Broadband track double-body mutual inductor

Abstract

The utility model discloses a broadband track double-body mutual inductor. The broadband track double-body mutual inductor comprises a first current transformer and a second current transformer, according to the utility model, the first current transformer and the second current transformer are arranged to be of an integrated structure and are in a double-ring 8 shape, so that the current of two paths of moving tracks can be measured at the same time, the overall size is reduced, the problem of small installation space is solved, the installation is simple and convenient, and the monitoring cost is reduced; and an annular magnetic core in the current transformer is a permalloy magnetic core and has a high-frequency characteristic, so that broadband measurement is realized, and the power of the mobile locomotive in the running process is monitored.

Description

TECHNICAL FIELD

[0001] The utility model relates to track circuit technical field especially relates to a wide frequency track double body mutual inductor. BACKGROUND

[0002] Track circuit is by steel rail line and steel rail insulation constitutes, is used for automatic, continuous detection whether this line is occupied by locomotive vehicle, also is used for control signal device or switch device, to guarantee the device of train safety.

[0003] With the continuous development of railway industry, digital track circuit realizes automatic detection and signal transmission to track occupation through digital technology, network technology and computer technology, ensures the safety and punctuality of train operation. The existing railway traction current measurement adopts a current transformer to measure a line, the traditional current transformer has the problem of narrow measurement frequency, and if multiple current transformers need to be mounted in a limited space to comprehensively monitor different lines, the volume of multiple current transformers is large, causing space congestion, installation inconvenience, low reliability and high monitoring cost. UTILITARIAN CONTENT

[0004] The main purpose of the utility model is to provide a wide frequency track double body mutual inductor, which aims to solve the problem of narrow measurement frequency of traditional current sensor, when multiple current transformers need to be mounted in a limited space to comprehensively monitor different lines, the volume of multiple current transformers is large, causing space congestion, installation inconvenience, low reliability and high monitoring cost.

[0005] In order to achieve the above purpose, the utility model provides a wide frequency track double body mutual inductor, which comprises:

[0006] The first current transformer and the second current transformer are arranged in an integrated structure in the shape of double ring 8.

[0007] The first current transformer and the second current transformer respectively have a first annular magnetic core and a second annular magnetic core, and the first annular magnetic core and the second annular magnetic core are permalloy magnetic cores.

[0008] In an embodiment, the permalloy magnetic core is wound with a main winding and a compensation winding.

[0009] In an embodiment, the wide frequency track double body mutual inductor further comprises an upper shell and a lower shell, and the upper shell and the lower shell are fastened and connected through a double fastening assembly.

[0010] In an embodiment, the double fastening assembly comprises an inner buckle and a screw.

[0011] In an embodiment, the wideband track double-body mutual inductor further comprises a waterproof assembly arranged on the coupling surface of the upper shell and the lower shell.

[0012] In an embodiment, the waterproof assembly is a silica gel ring.

[0013] In an embodiment, the wideband track double-body mutual inductor further comprises an open circuit protection circuit for protecting the first current transformer and the second current transformer when the first current transformer and the second current transformer are open.

[0014] The utility model discloses a technical scheme that the first current transformer and the second current transformer are integrally arranged in a double-ring 8-shaped structure, so as to measure the current of two moving tracks at the same time, reduce the overall size, solve the problem of small installation space, and facilitate installation and reduce monitoring cost. The annular magnetic core in the current transformer is a permalloy magnetic core, which has high-frequency characteristics, realizes wideband measurement, and monitors the power during the operation of the moving locomotive. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the overall structural drawing of the wideband track double-body mutual inductor of the utility model;

[0016] Figure 2 It is the structure three view of the wideband track double-body mutual inductor of the utility model;

[0017] Figure 3 It is the circuit diagram of the current transformer of the wideband track double-body mutual inductor of the utility model;

[0018] Figure 4 It is the wiring schematic diagram of the wideband track double-body mutual inductor of the utility model. DETAILED DESCRIPTION

[0019] To make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all the embodiments. The components of the embodiments of the utility model described and shown in the drawings can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the utility model.

[0021] It should be noted that similar reference numerals and letters indicate similar items throughout the drawings, and thus once an item is defined in one drawing, it is not necessary to further define and explain it in subsequent drawings.

[0022] In the description of the utility model, it needs to be understood that the orientation or position relationship indicated by the terms "upper", "lower", "inner", "outer", "left", "right" and the like is based on the orientation or position relationship shown in the drawings, or is the orientation or position relationship commonly placed when the utility model product is used, or is the orientation or position relationship commonly understood by those skilled in the art, and is only for the convenience of describing the utility model and simplifying the description, and thus cannot be understood as indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as limiting the utility model.

[0023] In addition, the terms "first", "second" and the like are only used for differentiation in description and cannot be understood as indicating or implying relative importance.

[0024] In the description of the utility model, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms "arrange", "connect" and the like should be understood in a broad sense, for example, "connect" can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be direct connection, can also be indirect connection through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0025] With the continuous development of the railway industry, the digital track circuit realizes the automatic detection of the track occupation condition and the signal transmission through digital technology, network technology and computer technology, and ensures the safety and punctuality of train operation. The existing railway traction current measurement adopts one current transformer to measure one line, and the traditional current transformer has the problem of narrow measurement frequency; and if multiple current transformers need to be mounted in a limited space to comprehensively monitor different lines, the volume of multiple current transformers is large, causing space congestion, inconvenient installation, low reliability and high monitoring cost.

[0026] In order to solve the above problems, the utility model provides a wide frequency track double-body mutual inductor, and the specific implementation manner of the present application is described in detail below in combination with the drawings.

[0027] As shown in the figure, the wide frequency track double-body mutual inductor comprises: Figures 1-4

[0028] The first current transformer and the second current transformer are arranged in an integrated structure in a double-ring 8-shaped manner.​

[0029] The first current transformer and the second current transformer have a first toroidal magnetic core and a second toroidal magnetic core respectively, and the first toroidal magnetic core and the second toroidal magnetic core are permalloy magnetic cores.

[0030] In an embodiment, the permalloy magnetic core is wound with a main winding and a compensation winding.

[0031] In the embodiment, the current transformer comprises a toroidal magnetic core, a main winding and a compensation winding; the toroidal magnetic core is a permalloy magnetic core made of a permalloy magnetic material with high frequency characteristics, the measurement frequency range is 10Hz-5KHz, wide frequency measurement is realized, and the influence between the two toroidal magnetic cores due to the material of the magnetic cores is reduced to ensure the measurement accuracy; the compact layout of the main winding and the compensation winding is combined to improve the response sensitivity of the current transformer under high frequency signals; the output of the current transformer is compensated by the compensation winding to improve the output linearity, thereby improving the accuracy and reliability of the measurement.

[0032] In actual application, the current transformer is based on the principle of electromagnetic induction to convert a large current into a small current for measurement, and has a large volume. Figure 3 As shown in the figure, the peak value I1 of the primary input single frequency alternating current and the peak value U2 of the secondary output single frequency alternating voltage are in a linear relationship, the output signal Uo=U2 after the rectifier circuit and the filter circuit, and thus the peak value I1 of the primary input single frequency alternating current and the output signal Uo are in a proportional function relationship.

[0033] The first current transformer and the second current transformer are of an integrated structure and in a double-ring 8-shaped structure, compared with a single current transformer, the double-body sensor can measure two currents at the same time, the overall volume is reduced, the problem of crowded installation space is solved, installation is simple, and the monitoring cost is lower. In addition, the wide frequency track double-body transformer does not need to be provided with an additional working power supply, it can convert the input measured current into a corresponding current output, has a extension line protection function, has a simple structure, and stable electrical performance. It should be noted that when the wide frequency track double-body transformer is installed in a centralized manner, the minimum installation interval distance value is set to 10mm to ensure the safety distance.

[0034] The wide frequency track double-body transformer of the utility model through setting first current transformer and second current transformer are of an integrated structure and in a double-ring 8-shaped structure, to measure the current of two moving tracks at the same time, reduce the overall volume, solve the problem of small installation space, installation is simple, reduce the monitoring cost, and the toroidal magnetic core in the current transformer is a permalloy magnetic core, which has high frequency characteristics, realizes wide frequency measurement, and monitors the power in the running process of the mobile locomotive.

[0035] In one embodiment, the broadband track dual-body current transformer further includes an upper housing and a lower housing, which are fastened together by a double fastening assembly.

[0036] In one embodiment, the dual fastening assembly includes an inner clip and a screw.

[0037] In this embodiment, a first current transformer and a second current transformer are provided between the upper and lower housings, and the upper and lower housings are fastened together by a double fastening assembly to prevent vibration. The double fastening assembly can be any double fastening assembly with a fastening function; in this example, the double fastening assembly uses internal clips and screws for installation and fixation, improving the vibration resistance. It should be noted that when opening, the screws should be opened first, followed by the internal clips; otherwise, the retaining pin may be damaged. Furthermore, the aperture of the upper and lower housings is set to Ф31mm, and flame-retardant materials are used to resist aging, prevent deformation, and protect against ultraviolet rays, thereby effectively extending the service life of the broadband track dual-body current transformer.

[0038] In one embodiment, the broadband track dual-body current transformer further includes a waterproof component disposed on the coupling surface of the upper housing and the lower housing.

[0039] In one embodiment, the waterproof component is a silicone ring.

[0040] This embodiment provides a waterproof component on the coupling surface of the upper and lower housings, specifically at the air gap of the wideband track double-body current transformer. The waterproof component can be any waterproof component, such as a silicone ring, to prevent the wideband track double-body current transformer from being exposed to water outdoors for extended periods, thereby improving measurement accuracy and reliability.

[0041] In one embodiment, the broadband track dual-body current transformer further includes an open-circuit protection circuit, which is used to protect the first current transformer and the second current transformer when the first current transformer and the second current transformer are open-circuited.

[0042] Because existing single-hole current transformers lack secondary output open-circuit protection, abnormally high voltages can be generated, posing a serious threat to equipment and personnel safety. This embodiment limits the generation of high voltage by setting up an open-circuit protection circuit to protect the current transformer and improve safety. It is understood that when the current transformer is working normally, the open-circuit protection impedance is infinite; when the secondary circuit of the current transformer is open, the open-circuit protection circuit activates to protect the current transformer. Furthermore, the wiring diagram of the broadband track double-body current transformer is shown below. Figure 4 As shown, the wiring principle is that the secondary side of the wideband track double-body current transformer must not be open-circuited.

[0043] The wideband track double-body mutual inductor is integrally provided with the first current sensor and the second current sensor and is in double-ring 8-shaped form, so that the overall volume is reduced, the problem of space congestion is solved, the waterproof function is increased, the measurement reliability is improved, and the cost is lower.

[0044] The above only describes the preferred embodiments of the present application, and it should be noted that those skilled in the art can make some improvements and refinements without departing from the technical principles of the present application, and these improvements and refinements should also be considered within the protection scope of the present application.

Claims

1. A broadband track dual-body current transformer, characterized in that, The broadband track dual-body current transformer includes: The first current transformer and the second current transformer are configured as an integral structure in a double-ring figure-eight shape. The first current transformer and the second current transformer each have a first toroidal core and a second toroidal core, and the first toroidal core and the second toroidal core are permalloy cores.

2. The broadband track double-body current transformer according to claim 1, characterized in that, The permalloy magnetic core is wound with a main winding and a compensation winding.

3. The broadband track double-body current transformer according to claim 1, characterized in that, The broadband track dual-body current transformer also includes an upper housing and a lower housing, which are fastened together by a double fastening assembly.

4. The broadband track double-body current transformer according to claim 3, characterized in that, The dual fastening assembly includes an inner clip and a screw.

5. The broadband track double-body current transformer according to claim 3, characterized in that, The broadband track dual-body current transformer also includes a waterproof component, which is disposed on the coupling surface of the upper housing and the lower housing.

6. The broadband track double-body current transformer according to claim 5, characterized in that, The waterproof component is a silicone ring.

7. The broadband track double-body current transformer according to claim 1, characterized in that, The wideband track dual-body current transformer also includes an open-circuit protection circuit, which is used to protect the first current transformer and the second current transformer when the first current transformer and the second current transformer are open-circuited.

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