Double-machine alternating-current open-phase protector

Abstract

The invention relates to the technical field of railway signal control, in particular to a double-machine alternating-current open-phase protector. By arranging the dual-machine subsystem, the standby machine can be switched for use according to the fault mode of the current working subsystem, so that the fault probability of the open-phase protector is greatly reduced, and the operation safety of the speed-up turnout is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of railway signal control, and is a dual-machine AC phase-failure protector. Background Art

[0002] In the speed-up turnout circuit, in order to protect the AC three-phase motor, a phase-failure protector is usually set. This device is an electronic product with a high failure rate. At present, there are mainly two types of phase-failure protector failures on the track: one is that the phase-failure protector has no DC output or instantaneous output, so that the protection relay BHJ cannot be excited or falls quickly after excitation; the other is that there is still DC output after the phase is broken, causing the protection relay BHJ not to fall. Summary of the invention

[0003] In order to address the technical gap in the prior art, an embodiment of the present application provides a dual-machine AC phase failure protector, which adopts dual-machine complete isolation technology and has two sets of hot standby structures to ensure that any damage to the host components will not affect the normal operation and switching of the standby machine.

[0004] In order to achieve the above purpose, the technical solution adopted in the embodiment of the present application is as follows:

[0005] In a first aspect, a dual-machine AC phase-failure protector is provided, which is applied to a speed-up turnout circuit, and includes: a main machine subsystem and a backup machine subsystem, wherein a plurality of detection units are arranged in the main machine subsystem and the backup machine subsystem for detecting the operating status of the two subsystems; and a switching unit for switching the power-on status of the main machine subsystem and the backup machine subsystem, wherein the switching unit performs power-on switching of the main machine subsystem and the backup machine subsystem according to the operating status.

[0006] In another practicable manner, the detection unit includes a power detection unit, a current detection unit and a drive output detection unit.

[0007] In another practicable manner, the power supply detection unit is used to collect power supply voltage data.

[0008] In another practicable manner, the current detection unit is used to collect current data.

[0009] In another practicable manner, the drive detection output unit is used to obtain an output voltage.

[0010] Another practicable manner is characterized in that the switching unit performs power-on switching of the host subsystem and the standby subsystem according to any operating state.

[0011] In another practicable manner, when the power supply voltage data is abnormal, the host subsystem in the current path is switched to the standby subsystem, or the standby subsystem in the current path is switched to the host subsystem.

[0012] In another practicable manner, when the current data is abnormal, the host subsystem in the current path is switched to the standby subsystem, or the standby subsystem in the current path is switched to the host subsystem.

[0013] In another practicable manner, when the output voltage is abnormal, the host subsystem in the current path is switched to the standby subsystem, or the standby subsystem in the current path is switched to the host subsystem.

[0014] In another practicable manner, the detection time point of the power detection unit, the current detection unit and the drive output detection unit is when the switch is pulled.

[0015] The embodiments of the present invention bring the following beneficial effects:

[0016] In the technical solution provided in the embodiment of the present application, by setting up a dual-machine subsystem, the backup machine can be switched for use according to the failure mode of the current working subsystem, greatly reducing the failure probability of the phase protector and ensuring the safe operation of the speed-up turnout.

[0017] Other features and advantages of the present disclosure will be set forth in the following description, or some features and advantages may be inferred or unambiguously determined from the description, or may be learned by implementing the above-mentioned technology of the present disclosure.

[0018] In order to make the above-mentioned objectives, features and advantages of the present disclosure more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] The methods, systems and / or programs in the accompanying drawings will be further described according to exemplary embodiments. These exemplary embodiments will be described in detail with reference to the drawings. These exemplary embodiments are non-limiting exemplary embodiments, wherein example numbers represent similar mechanisms in the various views of the accompanying drawings.

[0021] Figure 1 This is a schematic diagram of the structure of a dual-machine AC phase-failure protector. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships described in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be connected, detachably connected, or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0028] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0029] The speed-up turnout circuit is an important part of the railway signal system, which involves the control and monitoring of the turnout to ensure that the train passes through the turnout area safely and efficiently. Among them, the AC phase failure protector in the speed-up turnout circuit is an important safety device, and its main function is to protect the three-phase motor from being burned out when the three-phase power supply is missing or the three-phase load is missing.

[0030] DBQ-S type phase failure protector and BHJ type phase failure protector are currently the protectors commonly used in railway AC electric switch motor control. However, in the actual scenarios of the prior art, it is found that the above two protectors have certain working defects, resulting in the relay not falling and causing working risks.

[0031] Therefore, in view of the above background technology, an embodiment of the present application provides a dual-machine AC phase-failure protector, which ensures that when the main machine fails, the backup machine is automatically switched for use by adopting a combination of a main machine and a backup machine, thereby greatly reducing the failure probability of the phase-failure protector and ensuring the safe operation of the speed-up turnout.

[0032] For more information about this phase failure protector, please refer to Figure 1 The structure shown includes a host subsystem, a standby subsystem and a switching unit. The switching unit is controlled by a single chip microcomputer, and the switching unit can determine whether the working status of the host A and the standby B is normal by detecting multiple status data of the above two subsystems.

[0033] The multiple status data in the host subsystem and the standby subsystem are power supply voltage data, current data and output voltage data respectively.

[0034] The above data are collected through the power supply detection unit, current detection unit and drive output detection unit set in the host subsystem and the standby subsystem. Specifically, the power supply voltage data is collected through the power supply detection unit, and the current data and output voltage data are collected through the current detection unit and the drive output detection unit respectively.

[0035] In this embodiment, the working logic of the switching unit is to switch the currently working subsystem when any of the above data is abnormal, that is, when any of the power supply voltage data, current data and output voltage data is abnormal, the currently working subsystem is switched.

[0036] However, it is worth noting that in this embodiment, the host subsystem is selected as the execution subsystem, and when any of the above data in the host subsystem has a problem, it is switched to the standby subsystem. The time point for detection is when the switch is pulled.

[0037] Specifically, for abnormal judgment conditions:

[0038] (1) Power supply detection unit: When the switch is turned, there is no voltage in any power supply of the phase protection device;

[0039] (2) Current detection unit: when any current is 0 when the switch is turned;

[0040] (3) Drive output detection unit: When the switch is turned, the output voltage of the phase protection device is less than 20V.

[0041] The dual-machine AC phase failure protector provided in this embodiment has the following specific performances:

[0042] 1. Supports manual switching. After a failure occurs, it will automatically switch to the backup machine and cannot be switched back again.

[0043] 2. Using dynamic monitoring technology, the slave mode automatically monitors the working status of the host mode.

[0044] 3. Real-time display of A, B, C three-phase current and output drive voltage, and can display the working status and fault status of the main machine and standby machine.

[0045] 4.Support 13s and 30s fault alarm.

[0046] 5. The single chip microcomputer precisely controls the time-limited protection; the output voltage is stable and meets the requirements.

[0047] 6. The lead-out terminals are the same as the existing phase-failure protectors and can be directly replaced by hot plugging.

[0048] By setting up a dual-machine subsystem, the embodiment of the present application can switch to a backup machine according to the failure mode of the current working subsystem, greatly reducing the probability of phase-break protector failure and ensuring the safe operation of the speed-up turnout.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A dual-machine AC phase failure protector, characterized in that: The invention is applied to a speed-up turnout circuit, and comprises: a main subsystem and a standby subsystem, wherein a plurality of detection units are arranged in the main subsystem and the standby subsystem for detecting the operation status of the two subsystems; and a switching unit for switching the power-on status of the main subsystem and the standby subsystem, wherein the switching unit performs power-on switching of the main subsystem and the standby subsystem according to the operation status.

2. The dual-machine AC phase failure protector according to claim 1 is characterized in that: The detection unit includes a power detection unit, a current detection unit and a drive output detection unit.

3. The dual-machine AC phase failure protector according to claim 2 is characterized in that: The power supply detection unit is used to collect power supply voltage data.

4. The dual-machine AC phase failure protector according to claim 2 is characterized in that: The current detection unit is used to collect current data.

5. The dual-machine AC phase failure protector according to claim 2 is characterized in that: The drive detection output unit is used to obtain an output voltage.

6. The dual-machine AC phase failure protector according to any one of claims 1 to 5, characterized in that: The switching unit performs power-on switching between the host subsystem and the standby subsystem according to any operating state.

7. The dual-machine AC phase failure protector according to claim 6 is characterized in that: When the power supply voltage data is abnormal, the host subsystem in the current path is switched to the standby subsystem, or the standby subsystem in the current path is switched to the host subsystem.

8. The dual-machine AC phase failure protector according to claim 6, characterized in that: When the current data is abnormal, the host subsystem in the current path is switched to the standby subsystem, or the standby subsystem in the current path is switched to the host subsystem.

9. The dual-machine AC phase failure protector according to claim 6, characterized in that: When the output voltage is abnormal, the host subsystem in the current path is switched to the standby subsystem, or the standby subsystem in the current path is switched to the host subsystem.

10. The dual-machine AC phase failure protector according to claim 7 or 9, characterized in that: The detection time point of the power detection unit, the current detection unit and the drive output detection unit is when the turnout is pulled.

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