CN219832338U - Current transformer - Google Patents

Abstract

The utility model provides a current transformer which can solve the problem that the current transformer in the prior art cannot collect temperature data of a tested line. The current transformer includes: the shell comprises an upper shell and a lower shell which are mutually matched, and notches are respectively arranged on two opposite sides of a closed position of the upper shell and the lower shell; the iron core is wound with a current induction coil and comprises a first semi-annular iron core arranged in the upper shell and a second semi-annular iron core arranged in the lower shell; the electricity taking and energy storage module is arranged in the lower shell and used for storing electric energy output by the current induction coil; the microprocessor module is arranged in the lower shell; the wireless communication module is arranged in the lower shell; the temperature sensor is arranged at the notch of the lower shell and is connected with the microprocessor module; the temperature sensor is used for collecting temperature data of a measured line passing through the notch and the iron core when the upper shell and the lower shell are in a closed state, and the microprocessor module uploads the temperature data through the wireless communication module.

Description

Current transformer

Technical Field

The utility model relates to the technical field of sensing, in particular to a current transformer.

Background

The current transformer is generally used for current sampling of a tested line in a power system, however, the traditional current transformer generally adopts wired transmission for sampling signals, and the defects of complex wiring, high installation cost and the like exist in practical application; although the wireless communication module and the power supply can be integrated on the current transformer to realize wireless transmission of sampling data, the volume and the operation and maintenance cost of the current transformer can be increased.

The utility model with the publication number of CN217587364U is related patent applied by the inventor in 21 years, and provides a self-powered wireless current transformer for energy consumption monitoring.

Since the temperature data of the measured line is also an important data, the current transformers in the prior art lack the capability of collecting the temperature data of the measured line.

Disclosure of Invention

The utility model aims to provide a current transformer so as to solve the problem that the current transformer in the prior art cannot collect temperature data of a tested line.

To solve the above technical problem, in a first aspect, the present utility model provides a current transformer, including:

the shell comprises an upper shell and a lower shell which are mutually matched, and notches are respectively arranged on two opposite sides of a closed position of the upper shell and the lower shell;

the annular iron core is wound with a current induction coil and comprises a first semi-annular iron core arranged on the upper shell and a second semi-annular iron core arranged in the lower shell; when the upper shell and the lower shell are closed, the notches of the upper shell and the lower shell are combined to form a channel, the first semi-annular iron core and the second semi-annular iron core are combined to form a closed annular iron core, and the channel corresponds to an annular hole of the annular iron core;

the electricity taking and energy storage module is arranged in the lower shell and used for storing electric energy output by the current induction coil;

the microprocessor module is arranged in the lower shell and connected with the electricity taking and energy storage module;

the wireless communication module is arranged in the lower shell and connected with the electricity taking energy storage module and the microprocessor module;

the temperature sensor is arranged at the notch of the lower shell and is connected with the microprocessor module;

the temperature sensor is used for collecting temperature data of a tested line passing through the notch and the iron core when the upper shell and the lower shell are in a closed state, and the microprocessor module uploads the temperature data through the wireless communication module.

Optionally, the notch of the lower shell is convexly provided with a lower clamping seat, the lower clamping seat is provided with a hole, the temperature sensor is arranged in the lower clamping seat, and the temperature probe of the temperature sensor is positioned in the hole.

Optionally, the temperature sensor is a contact temperature sensor, and the temperature probe protrudes out of the top of the lower clamping seat or is flush with the hole opening.

Optionally, an upper clamping seat corresponding to the lower clamping seat is convexly arranged at the notch of the upper shell; when the upper shell and the lower shell are closed, the upper clamping seat and the lower clamping seat are used for clamping the tested circuit.

Optionally, the upper clamping seat is movably embedded in the upper shell, and/or the lower clamping seat is movably embedded in the lower shell.

Optionally, a spring is fixed at the top of the upper clamping seat and/or at the bottom of the lower clamping seat.

Optionally, the method further comprises:

the shell state detection module is connected with the power-taking energy storage module and the microprocessor module;

the shell state detection module is used for outputting different signals to the microprocessor module when the upper shell and the lower shell are in a closed state or a non-closed state, and the microprocessor module is used for outputting prompt information through the wireless communication module when the upper shell and the lower shell are in the non-closed state.

Optionally, the shell state detection module comprises a switch circuit, wherein a switch is arranged on the switch circuit, and the switch is arranged at the closing position of the upper shell and the lower shell; the switch circuit outputs corresponding high-low level signals to the microprocessor module when the upper shell and the lower shell are in a non-closed state and a closed state.

Optionally, the switching circuit includes:

the first metal contact and the second metal contact are arranged at the closing position of the lower shell at intervals;

a metal sheet arranged at the closing position of the upper shell; when the upper shell and the lower shell are in a closed state, the metal sheet is connected with the first metal contact and the second metal contact;

wherein the first metal contact is grounded; the second metal contact is connected in parallel with the electricity-taking energy storage module and the microprocessor module.

Optionally, a protection resistor is connected in series between the second metal contact and the electricity-taking energy storage module.

Based on the current transformer, because the current transformer needs to be closed to be sleeved on the tested line when in use, when the upper shell and the lower shell are in a closed state, the temperature sensor arranged at the notch of the lower shell can collect the temperature data of the tested line passing through the notch and the iron core, and the problem that the current transformer in the prior art cannot collect the temperature data of the tested line can be solved by uploading the temperature data through the wireless communication module.

Drawings

Fig. 1 is an open state diagram of a current transformer according to an exemplary embodiment of the present utility model;

fig. 2 is an exploded view of a current transformer according to an exemplary embodiment of the present utility model;

fig. 3 is a diagram illustrating a closed state of a current transformer according to an exemplary embodiment of the present utility model;

fig. 4 is a second closed state diagram of a current transformer according to an exemplary embodiment of the present utility model;

FIG. 5 is a schematic diagram of a current transformer with a line under test placed in an open state according to an exemplary embodiment of the present utility model;

FIG. 6 is a schematic diagram of a current transformer with a circuit under test placed in a closed state according to an exemplary embodiment of the present utility model;

fig. 7 is a schematic circuit diagram of a shell status detection module in a current transformer according to an exemplary embodiment of the present utility model.

Detailed Description

Specific embodiments of the present utility model will be described in more detail below with reference to the drawings. Advantages and features of the utility model will become more apparent from the following description and claims. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for convenience and clarity in aiding in the description of embodiments of the utility model.

In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements 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 utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

The embodiment of the utility model firstly provides a current transformer, and the structure of the current transformer provided by the embodiment of the utility model is further described below.

Referring to fig. 1 and 2, fig. 1 is an open state diagram of a current transformer according to an exemplary embodiment of the present utility model, and fig. 2 is an exploded view of a current transformer according to an exemplary embodiment of the present utility model. As shown in fig. 1 and 2, the current transformer includes a housing, a toroidal core, a power-taking energy storage module 30, a microprocessor module 40, a wireless communication module 41, a temperature sensor 50, and a housing state detection module.

As shown in fig. 1, the housing comprises an upper housing 11 and a lower housing 12 which are mutually matched, and notches 110 and 120 are respectively arranged on two opposite sides of a closing position of the upper housing 11 and the lower housing 12. Referring to fig. 4 and 6, when the upper housing 11 and the lower housing 12 are closed, the notches 110 and 120 are combined into the channel 100, and the tested line 70 can penetrate through the channel 100.

More specifically, as shown in fig. 1 and 2, the upper case 11 includes a first upper case 111 and a second upper case 112, the first upper case 111 is covered on the second upper case 112, and a closing position of the upper case 11 is located at a bottom of the first upper case 111. After the first upper casing 111 covers the second upper casing 112, a space between the first upper casing 111 and the second upper casing 112 is used for accommodating components.

As shown in fig. 1 and 2, the lower housing 12 includes a first lower housing 121 and a second lower housing 122, the first lower housing 121 is covered on the second lower housing 122, and a closing portion of the lower housing 12 is located at the top of the first lower housing 121. The first lower case 121 covers the second lower case 122, and a space between the first lower case 121 and the second lower case 122 is used for accommodating components.

Further, as shown in fig. 1 and 2, the current transformer further includes a hinge structure formed by a rotation shaft 142 and two connection holes 141, the two connection holes 141 are fixed to one side of the lower case 12, and the rotation shaft 142 may be fixed to a corresponding side of the upper case 11. Two ends of the rotation shaft 142 may be correspondingly inserted into the two connection holes 141, and the corresponding sides of the upper and lower cases 11 and 12 are hinged by the hinge structure. That is, when the upper case 11 and the lower case 12 are in the open state, the upper case 11 can rotate relative to the lower case 12 without separating from the lower case 12, so that it is avoided that the upper case 11 or the lower case 12 falls to a plurality of wires at the bottom of the power distribution cabinet and is hard to find when the current transformer is used in the power distribution cabinet after the upper case 11 is opened.

Further, as shown in fig. 1 and 2, the current transformer further includes a fastening structure formed by a fastening 131 and a limiting bump 132, and the fastening structure and the hinge structure are located at two opposite sides of the housing. Wherein, the buckle 131 is located on the upper housing 11, the limit bump 132 is located on the lower housing 12, and when the upper housing 11 and the lower housing 12 are in a closed state, the buckle 131 is clamped on the limit bump 132, so that the housing is closed more tightly, and is not easy to be opened due to external factors.

With continued reference to fig. 1 and 2, the toroidal core includes a first semi-toroidal core 21 provided in the upper case 11 and a second semi-toroidal core 22 provided in the lower case 12, and the current induction coil 20 is wound on the second semi-toroidal core 22. When the upper and lower cases 11, 12 are in the closed state, the first and second half toroidal cores 21, 22 are combined into the toroidal core, and the channels 100 combined by the notches 110, 120 are aligned with the toroidal holes of the toroidal core.

As shown in fig. 2, the first semi-toroidal core 21 may be disposed astride the second upper casing 112, and a first spring 211 is disposed between the top of the first semi-toroidal core 21 and the first upper casing 111, and two ends of the first spring 211 are respectively fixed on the top of the first semi-toroidal core 21 and the first upper casing 111, so that the first semi-toroidal core 21 may be elastically connected to the first upper casing 111. When the upper case 11 and the lower case 12 are in an open state, the first semi-toroidal core 21 may partially protrude from the closed position of the upper case 11; when the upper case 11 and the lower case 12 are in the closed state, the second half toroidal core 22 can be abutted against the first half toroidal core 21, so that the first half toroidal core 21 is partially retracted into the upper case 11, and further, the half toroidal core 21 and the second half toroidal core 22 can be more tightly connected.

As shown in fig. 2, two sealing rings 200 are provided at the closing position of the lower housing 12, and the two sealing rings 200 are correspondingly sealed at two ends of the second semi-annular iron core 22. When the upper case 11 and the lower case 12 are in the closed state and the first and second half toroidal cores 21 and 22 are combined into the cores, the sealing ring 200 can well seal the junction of the first and second half toroidal cores 21 and 22.

As shown in fig. 2, the electricity-taking and energy-storing module 30, the microprocessor module 40 and the wireless communication module 41 are located in the lower housing 12, the electricity-taking and energy-storing module 30 is used for storing the electric energy output by the current induction coil 20, and the electricity-taking and energy-storing module 30 and the wireless communication module 41 are connected to the microprocessor module 40. In fig. 2, the power-taking energy storage module 30 may be a super capacitor fixed at the bottom of the microprocessor module 40, and the wireless communication module 41 is fixed at the top of the microprocessor module 40. The wireless communication module 41 may be a LORA module, a bluetooth module, a 4G or 5G wireless transmission module.

With continued reference to fig. 1 and 2, the housing state detection module is coupled to the power take-off energy storage module 30 and the microprocessor module 40. Wherein the housing state detection module outputs different signals to the microprocessor module 40 when the upper housing 11 and the lower housing 12 are in a closed state and a non-closed state, and the microprocessor module 40 outputs prompt information through the wireless communication module 41 when the upper housing 11 and the lower housing 12 are in a non-closed state.

Further, the shell state detection module comprises a switch circuit, wherein a switch is arranged on the switch circuit, and the switch is arranged at the closing position of the upper shell 11 and the lower shell 12; the switching circuit outputs corresponding high and low level signals to the microprocessor module 40 when the upper and lower cases 11 and 12 are in the non-closed state and the closed state. For example, the switching circuit outputs a high level signal to the microprocessor module 40 when the upper case 11 and the lower case 12 are in a non-closed state; the switching circuit outputs a low level signal to the microprocessor module 40 when the upper and lower cases 11 and 12 are in a closed state.

Still further referring to fig. 1 and 2, the switching circuit includes a first metal contact 61, a second metal contact 62, and a metal plate 63. Wherein the first metal contact 61 and the second metal contact 62 are arranged at the closing position of the lower shell 12 at intervals; the metal sheet 63 is disposed at the closing position of the upper housing 11, the first metal contact 61 is grounded, and the second metal contact 62 is connected in parallel to the power-taking energy storage module 30 and the microprocessor module 40. When the upper case 11 and the lower case 12 are in a closed state, the metal piece 63 connects the first metal contact 61 and the second metal contact 62. In order to protect the switching circuit, a protection resistor may be provided on the connection line of the power take-off energy storage module 30 and the second metal contact 62.

Referring to fig. 7, fig. 7 is a schematic circuit diagram of a housing state detection module in a current transformer according to an exemplary embodiment of the utility model. As shown in fig. 1, 2 and 7, when the metal piece 63 connects the first metal contact 61 and the second metal contact 62, the switching circuit of the case state detection module is closed. At this time, the current outputted from the electricity-taking energy storage module 30 flows to the protection resistor, the second metal contact 62, the metal sheet 63, the first metal contact 61, and the ground in this order. That is, the microprocessor module 40 does not receive the current output from the switching circuit of the case state detection module, that is, the switching circuit outputs a low level signal to the microprocessor module 40 when the upper case 11 and the lower case 12 are in a closed state. When the metal piece 63 is disconnected from the first metal contact 61 and the second metal contact 62, the switching circuit of the case state detection module is opened. At this time, the current output from the power-taking energy storage module 30 flows to the microprocessor module 40 through the protection resistor. That is, the microprocessor module 40 receives a current output from the switching circuit of the case state detection module, that is, outputs a high level signal to the microprocessor module 40 when the switching circuit is in an open state between the upper case 11 and the lower case 12.

Through setting up the casing state detection module that is used for monitoring the closed state between last casing and the lower casing, when someone opened the casing, casing state detection module can in time monitor this state to through wireless communication module output prompt message, solved among the prior art current transformer can not monitor self in non-closed state and lead to reminding untimely problem, increased the steal and torn open and remind the function.

Referring to fig. 1 and 2, the current transformer may further include a temperature sensor 50. The temperature sensor 50 is disposed at the notch of the lower housing 12 and connected to the microprocessor module 40. When the upper and lower housings 11 and 12 are in a closed state, the measured line 70 passes through the channel 100 formed by the notches 110 and 120 and the iron core, the temperature sensor 50 is used for collecting temperature data of the measured line 70, and the microprocessor module 40 uploads the temperature data of the measured line 70 through the wireless communication module 41.

Further, as shown in fig. 1 and 2, a lower clamping seat 51 is protruding at the notch of the lower housing 12, a hole is formed in the lower clamping seat 51, the temperature sensor 50 is disposed in the lower clamping seat 51, and the temperature probe of the temperature sensor 50 is located in the hole.

Further, as shown in fig. 1 and 2, the temperature sensor 50 is a contact temperature sensor, and the temperature probe of the temperature sensor 50 protrudes out of the top of the lower clamping seat 51 or is flush with the hole opening, so that the temperature probe of the temperature sensor 50 can be contacted by the tested line 70.

Preferably, as shown in fig. 1 and 2, an upper clamping seat 52 corresponding to the lower clamping seat 51 is protruding from the notch of the upper housing 11. Alternatively, as shown in fig. 2, the upper clamping seat 52 is movably embedded in the upper housing 11, and the lower clamping seat 51 is movably embedded in the lower housing 12. Specifically, a second spring 511 is fixed at the bottom of the lower card seat 51, and two ends of the second spring 511 are respectively fixed at the bottom of the lower card seat 51 and the microprocessor module 40; a third spring 521 is fixed on the top of the upper clamping seat 52, and two ends of the third spring 521 are respectively fixed on the top of the upper clamping seat 52 and the first upper shell 111.

Referring to fig. 3, when the upper housing 11 and the lower housing 12 are closed, the upper clamping seat 52 protrudes from the notch 110, the lower clamping seat 51 protrudes from the notch 120, and a testing circuit is sandwiched between the upper clamping seat 52 and the lower clamping seat 51. In use, as shown in fig. 5, when the upper housing 11 and the lower housing 12 are in an open state, the tested line 70 is transversely placed on the notch 120 of the lower housing 12, and then the upper housing 11 is closed. After closing, as shown in fig. 5, when the tested circuit 70 passes through the channel 100 formed by the notches 110 and 120 and the metal sheet 63 connects the first metal contact 61 and the second metal contact 62, the switch circuit of the housing state detection module is closed, and the temperature probe of the temperature sensor 50 contacts the tested circuit 70.

Compared with the prior art, based on the current transformer shown in fig. 1, because the current transformer needs to be closed to be sleeved on the tested line when in use, when the upper shell and the lower shell are in a closed state, the temperature sensor arranged at the notch of the lower shell can collect the temperature data of the tested line passing through the notch and the iron core, and the problem that the current transformer in the prior art cannot collect the temperature data of the tested line can be solved by uploading the temperature data through the wireless communication module.

It should be understood that the term "and/or" is merely an association relationship describing the associated object, and means that three relationships may exist, for example, a and/or B may mean: there are three cases, a alone, a and B together, and B alone, wherein a, B may be singular or plural. In addition, the character "/" herein generally indicates that the associated object is an "or" relationship, but may also indicate an "and/or" relationship, and may be understood by referring to the context.

In the present utility model, "at least one" means one or more, and "a plurality" means two or more. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b, or c may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or plural.

It should be understood that, in various embodiments of the present utility model, the sequence numbers of the foregoing processes do not mean the order of execution, and the order of execution of the processes should be determined by the functions and internal logic thereof, and should not constitute any limitation on the implementation process of the embodiments of the present utility model.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present utility model.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the several embodiments provided by the present utility model, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in the embodiments of the present utility model may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present utility model may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present utility model. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, or other various media capable of storing program codes.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims (10)

1. A current transformer, comprising:

the shell comprises an upper shell and a lower shell which are mutually matched, and notches are respectively arranged on two opposite sides of a closed position of the upper shell and the lower shell;

the annular iron core is wound with a current induction coil and comprises a first semi-annular iron core arranged on the upper shell and a second semi-annular iron core arranged in the lower shell; when the upper shell and the lower shell are closed, the notches of the upper shell and the lower shell are combined to form a channel, the first semi-annular iron core and the second semi-annular iron core are combined to form a closed annular iron core, and the channel corresponds to an annular hole of the annular iron core;

the electricity taking and energy storage module is arranged in the lower shell and used for storing electric energy output by the current induction coil;

the microprocessor module is arranged in the lower shell and connected with the electricity taking and energy storage module;

the wireless communication module is arranged in the lower shell and connected with the electricity taking energy storage module and the microprocessor module;

the temperature sensor is arranged at the notch of the lower shell and is connected with the microprocessor module;

the temperature sensor is used for collecting temperature data of a tested line passing through the notch and the iron core when the upper shell and the lower shell are in a closed state, and the microprocessor module uploads the temperature data through the wireless communication module.

2. The current transformer of claim 1, wherein a lower clamping seat is convexly arranged at the notch of the lower shell, a hole is formed in the lower clamping seat, the temperature sensor is arranged in the lower clamping seat, and a temperature probe of the temperature sensor is positioned in the hole.

3. The current transformer of claim 2, wherein the temperature sensor is a contact temperature sensor, and the temperature probe protrudes from the top of the lower clamping seat or is flush with the hole opening.

4. The current transformer according to claim 2, wherein an upper clamping seat corresponding to the lower clamping seat is convexly arranged at the notch of the upper shell; when the upper shell and the lower shell are closed, the upper clamping seat and the lower clamping seat are used for clamping the tested circuit.

5. The current transformer of claim 4, wherein the upper clamping seat is movably embedded in the upper shell, and/or the lower clamping seat is movably embedded in the lower shell.

6. The current transformer of claim 5, wherein springs are secured to the top of the upper cartridge and/or the bottom of the lower cartridge.

7. The current transformer of claim 1, further comprising:

the shell state detection module is connected with the power-taking energy storage module and the microprocessor module;

the shell state detection module is used for outputting different signals to the microprocessor module when the upper shell and the lower shell are in a closed state or a non-closed state, and the microprocessor module is used for outputting prompt information through the wireless communication module when the upper shell and the lower shell are in the non-closed state.

8. The current transformer of claim 7, wherein the housing state detection module comprises a switch circuit, the switch circuit is provided with a switch, and the switch is arranged at the closing position of the upper housing and the lower housing; the switch circuit outputs corresponding high-low level signals to the microprocessor module when the upper shell and the lower shell are in a non-closed state and a closed state.

9. The current transformer of claim 8, wherein the switching circuit comprises:

the first metal contact and the second metal contact are arranged at the closing position of the lower shell at intervals;

a metal sheet arranged at the closing position of the upper shell; when the upper shell and the lower shell are in a closed state, the metal sheet is connected with the first metal contact and the second metal contact;

wherein the first metal contact is grounded; the second metal contact is connected in parallel with the electricity-taking energy storage module and the microprocessor module.

10. The current transformer of claim 9, wherein a protection resistor is connected in series between the second metal contact and the power take-off energy storage module.