Split pre-installation type electrical fire monitoring equipment

Abstract

The utility model provides split pre-installed electrical fire monitoring equipment, and relates to the technical field of electrical fire monitoring. According to the utility model, each sensor is installed on a corresponding distribution line; the signal processing unit is installed on a specified distribution line to be monitored; and the connecting base is respectively connected with the sensor and the signal processing unit. During use, firstly, the sensors and the connecting bases are pre-installed in all the distribution lines and are connected, then the distribution line to be monitored is specified, and the signal processing unit is installed, so that electrical fire monitoring of the specified line is completed; furthermore, a next power distribution line to be monitored can be specified, the signal processing unit is dismounted, the installation position is replaced, and the electrical fire monitoring work of all the power distribution lines is completed step by step. And compared with a single deployment mode of installing a sensor and a signal processing unit in a complete set, the use amount of the signal processing unit is reduced, the dismounting and reinstallation construction cost is reduced, the flexibility is high, and the economical efficiency is good.

Description

TECHNICAL FIELD

[0001] The utility model relates to electrical fire monitoring technical field, concretely relates to a split pre -installation type electrical fire monitoring equipment. BACKGROUND

[0002] In the related art, the electrical fire monitoring detector is composed of a sensor (the sensor of the residual current type electrical fire monitoring detector is a residual current transformer, and the sensor of the temperature measuring type electrical fire monitoring detector is a temperature measuring sensor) and a signal processing unit.

[0003] Specifically, in the technical and market practice for many years, some technical solutions change the combination mode of the sensor and the signal processing unit, integrate the sensor and the signal processing unit, and facilitate use, such as patents CN201310182010.7, CN201310182607.1 and CN201310181089.1. In addition, some technical solutions process the signal processing unit and the shell in a split mode, enhance the protection of the device body, or limit the wiring, such as patents CN202222592625.4 and CN202221212812.9.

[0004] However, in general, when using the electrical fire monitoring detector for power monitoring, the original technical solution is to install the sensor and the signal processing unit simultaneously in the selected installation position, monitor and alarm each monitored line for a long time, and the deployment mode is single and the construction cost is high when removing and reinstalling. UTILITY MODEL CONTENTS

[0005] (I) Technical problem solved

[0006] In view of the deficiencies of the prior art, the utility model provides a split pre -installation type electrical fire monitoring equipment, which solves the technical problems that the sensor and the signal processing unit are simultaneously installed in the selected installation position, each monitored line is monitored and alarmed for a long time, the deployment mode is single, and the construction cost is high when removing and reinstalling.

[0007] (II) Technical scheme

[0008] To achieve the above purpose, the utility model is realized by the following technical scheme:

[0009] A split pre -installation type electrical fire monitoring equipment, comprising a plurality of sensors, at least one signal processing unit and a connecting base;

[0010] Each of the sensors is installed on the corresponding power distribution line;

[0011] The signal processing unit is installed on a designated power distribution line to be monitored in all power distribution lines;

[0012] The connecting base is connected with the sensor and the signal processing unit respectively.

[0013] Preferably, the connecting base comprises a first terminal group, a second terminal group and a structure fastener.

[0014] The first terminal group is connected with the second terminal group, the first terminal group is connected with the sensor, and the second terminal group is connected with the signal processing unit.

[0015] The structure fastener is used for being installed on a wall body or in a power distribution box body.

[0016] Preferably, the connecting base comprises a cover plate.

[0017] The cover plate is installed above the second terminal group and forms a closed cavity with the structure fastener.

[0018] Preferably, the connecting base comprises a two-dimensional code or an NFC tag, which is used for completing device configuration online.

[0019] Preferably, the sensor comprises a residual current transformer, and one or a combination of a load current transformer, a voltage sampling line and a temperature detector.

[0020] (Three) beneficial effects

[0021] The utility model provides a kind of split pre-installation type electrical fire monitoring equipment.Compared with prior art, it has the following beneficial effects:

[0022] The utility model discloses a plurality of sensors, at least one signal processing unit and connecting base;Each sensor is installed on corresponding power distribution line respectively;Signal processing unit is installed on the designated power distribution line to be monitored in all power distribution lines;Connecting base is connected with sensor and signal processing unit respectively.Use, first pre-installation sensor and connecting base in all power distribution lines, and the both are connected, after specifying the power distribution line to be monitored and installing signal processing unit, to complete the electrical fire monitoring of specified line;Further, the next power distribution line to be monitored can be specified, signal processing unit is removed and replaced installation position, and the electrical fire monitoring work of all power distribution lines is completed in steps.Compared with the single deployment mode of complete installation sensor and signal processing unit, the use amount of signal processing unit is reduced, the removal and reinstallation construction cost is reduced, and it is high in flexibility and good in economy. DRAWINGS

[0023] In order to make the technical scheme of the embodiments of the present application or the prior art clearer, the accompanying drawings needed in the description of the embodiments or the prior art will be briefly introduced as follows. Obviously, the accompanying drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0024] Figure 1 A structure schematic diagram of a split pre-installation type electrical fire monitoring device provided by the embodiment of the present application is shown in the figure.

[0025] Figure 2 A structure schematic diagram of a connecting base (without a cover plate) provided by the embodiment of the present application is shown in the figure.

[0026] Figure 3 A structure schematic diagram of a connecting base (with a cover plate) provided by the embodiment of the present application is shown in the figure.

[0027] Figure 4 A flow chart of a split pre-installation type electrical fire monitoring method provided by the embodiment of the present application is shown in the figure.

[0028] Figure 5 A flow chart of another split pre-installation type electrical fire monitoring method provided by the embodiment of the present application is shown in the figure.

[0029] Among them, 101-first terminal group, 102-second terminal group, 103-structure fastener, 104-cover plate. DETAILED DESCRIPTION

[0030] In order to make the technical scheme of the embodiments of the present application or the prior art clearer, the accompanying drawings needed in the description of the embodiments or the prior art will be briefly introduced as follows. Obviously, the accompanying drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0031] The embodiment of the present application provides a split pre-installation type electrical fire monitoring device, which solves the technical problem that sensors and signal processing units are installed simultaneously in the selected installation position, each monitored line is monitored and alarmed for a long time, the deployment mode is single, and the construction cost is high when the device is removed and reinstalled, and the use amount of signal processing units in the power monitoring scheme is greatly reduced, and the economic efficiency of the step-by-step precise monitoring deployment mode of the electrical fire monitoring detector is significantly improved.

[0032] The technical scheme in the embodiment of the present application is as follows to solve the above technical problem:

[0033] The pre-installed split electrical fire monitoring device provided in this embodiment includes several sensors, at least one signal processing unit, and a connecting base; each sensor is installed on a corresponding power distribution line; the signal processing unit is installed on the designated power distribution line to be monitored in all power distribution lines; the connecting base is connected to the sensor and the signal processing unit respectively.

[0034] In use, first, sensors and connection bases are pre-installed in all power distribution lines and connected together. Then, the power distribution lines to be monitored are specified and signal processing units are installed to complete the electrical fire monitoring of the specified lines.

[0035] Furthermore, the next power distribution line to be monitored can be specified, and the signal processing unit can be removed and reinstalled in a different location to complete the electrical fire monitoring work for all power distribution lines in stages.

[0036] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0037] Example 1:

[0038] like Figure 1 As shown in the figure, this utility model embodiment provides a split pre-installed electrical fire monitoring device, including several sensors, at least one signal processing unit, and a connecting base.

[0039] Each of the sensors is installed on its respective power distribution line.

[0040] The signal processing unit is installed on the designated power distribution line to be monitored in all power distribution lines.

[0041] The connecting base is connected to the sensor and the signal processing unit respectively.

[0042] Compared with the single deployment mode of installing sensors and signal processing units as a set, the embodiments of this utility model reduce the number of signal processing units used, reduce the construction costs of dismantling and reinstallation, and are highly flexible and economical.

[0043] In an alternative implementation, such as Figure 2 As shown, the connecting base includes a first terminal group, a second terminal group, and structural fasteners.

[0044] The first terminal group and the second terminal group are connected to each other. The first terminal group is connected to the sensor, and the second terminal group is connected to the signal processing unit.

[0045] For example, such as Figure 2As shown, the first terminal group can be modularly designed, and specifically arranged in two parallel rows.

[0046] The structural fastener is used for being mounted on a wall or in a distribution box.

[0047] As shown, Figure 2 As shown, the structural fastener can be fixed by using a screw.

[0048] Further, as shown, Figure 3 As shown, the connecting base further comprises a cover plate.

[0049] The cover plate is mounted above the second terminal group, and forms a closed cavity with the structural fastener, for dust and water proofing when the signal processing unit is not installed, and protecting the second terminal group.

[0050] Further, the connecting base further comprises a two-dimensional code or an NFC tag, which is used for completing device configuration online.

[0051] In an optional embodiment, the sensor comprises a residual current transformer, and one or any combination of a load current transformer, a voltage sampling line and a temperature detector.

[0052] It should be noted that the sensor at least comprises a residual current transformer, otherwise the functional requirements of the product national standard GB14287.2 "Residual Current Electrical Fire Monitoring Detector" cannot be met.

[0053] Embodiment 2:

[0054] As shown, Figure 4 The utility model embodiment provides a kind of split pre-installation type electrical fire monitoring method based on the split pre-installation type electrical fire monitoring device described in embodiment 1, comprising:

[0055] S1, by the structure fastener of connecting base is fixed, and after pre-installing sensor on all monitored distribution line, the sensor is connected with the first terminal group of connecting base.

[0056] S2, in all distribution line, specified distribution line to be monitored.

[0057] S3, install signal processing unit on specified distribution line, and the second terminal group of connecting base is connected with the signal processing unit.

[0058] S4, using the connecting base and the sensor and signal processing unit on the specified power distribution line, performing electrical fire monitoring on the specified power distribution line, and based on the monitoring result, performing risk early warning and / or providing management and control processing suggestions.

[0059] The embodiment of the utility model under the premise of limited signal processing unit quantity, specified one or part more dangerous or more important power distribution line to be monitored is given priority to to carry out electrical fire monitoring, can promote the pertinence of electrical safety hidden danger governance resource investment, promote the comprehensive efficiency of electrical safety management work.

[0060] In an optional embodiment, as shown in Figure 5 The split pre-installation type electrical fire monitoring method provided by the embodiment of the utility model further comprises:

[0061] S5, remove the signal processing unit on the current specified power distribution line, install the cover plate of the connecting base, and specify the next power distribution line to be monitored, remove the cover plate of the connecting base on the new specified power distribution line and install the signal processing unit, perform electrical fire monitoring on the new specified power distribution line, repeat the above operation until all power distribution lines are monitored.

[0062] The embodiment of the utility model completes all power distribution line monitoring in steps, which is a deployment mode of electrical fire monitoring equipment that reduces initial construction cost at the cost of improving operation and maintenance cost, and is suitable for user units with tight construction funds but strong operation and maintenance capability. Based on the innovative structure of the above split pre-installation type electrical fire monitoring equipment, the construction cost of the step-by-step monitoring deployment mode can be significantly reduced, and the economy can be improved.

[0063] In an optional embodiment, the structure fastener of the connecting base is fixed in step S1, and the fixed position can be on the wall or in the power distribution box body, which is not limited to be unique.

[0064] In addition, the power distribution line is a single-phase line or a three-phase line, and the sensor is pre-installed on all power distribution lines in step S1.

[0065] (1) when the sensor is a residual current transformer, each residual current transformer is used to cover the fire wire and zero wire or three-phase wire and zero wire of the power distribution line, and the signal line of the residual current transformer is connected to the first terminal group.

[0066] (2) when the sensor is a residual current transformer, and one or any combination of a load current transformer, a voltage sampling line and a temperature detector, each residual current transformer is used to cover the fire wire and zero wire or three-phase wire and zero wire of the power distribution line.

[0067] and the voltage sampling line is connected with the terminal of the fire wire or three-phase phase wire of the power distribution line, and the temperature detector is tied near the terminal of the power distribution line;

[0068] and the signal lines of all the above sensors are connected with the first terminal group.

[0069] In an optional embodiment, the power distribution lines to be monitored are designated in all the power distribution lines in step S2; and the designation can be divided into several typical cases:

[0070] (1) all the power distribution lines are the same level lines and there is an upper level line, the power distribution lines to be monitored are designated in all the power distribution lines based on the electrical fire monitoring result of the upper level line.

[0071] Specifically, the original electrical fire monitoring detector is installed on the upper level power distribution line of all the power distribution lines (for example, if all the power distribution lines are the secondary power distribution lines of a project, the upper level power distribution line is the primary power distribution line of the project), and the power distribution lines to be monitored are selected based on the electrical fire monitoring result of the upper level power distribution line (for example, if the primary power distribution line detects that some secondary power distribution lines have long-term leakage exceeding the standard and alarm, these lines are selected).

[0072] (2) all the power distribution lines are preliminarily detected for electrical fire prevention, and the power distribution lines to be monitored are designated in all the power distribution lines based on the detection result.

[0073] Specifically, a round of detection (such as fire electrical fire prevention detection) is carried out, and the power distribution lines to be monitored are selected based on the detection result (for example, if the fire electrical fire prevention detection finds that some lines have electrical safety hazards, these lines are selected).

[0074] (3) all the power distribution lines are investigated in advance, and the power distribution lines to be monitored are designated in all the power distribution lines based on the investigation result.

[0075] Specifically, all the power distribution lines are divided into several groups (for example, the power distribution lines of each floor in a park are regarded as the lines to be monitored, and each building or a plurality of buildings can be divided into a group), and the groups are reasonably sorted (for example, the buildings are sorted in descending order of the building completion and use year, or in descending order of the power consumption, etc.), and each group is sequentially regarded as the power distribution line to be monitored.

[0076] In an optional embodiment, step S3 can further include starting the online mode of the device configuration required for the electrical monitoring of the designated power distribution line.

[0077] In fact, from the perspective of feasibility, this can be either the most basic post-installation cloud manual selection or entry of the monitored line name, or a more specific technical means, for example:

[0078] (1) Set a two-dimensional code on the connection base and the signal processing unit. After reinstalling the cover plate of the connection base, complete the device configuration online by scanning the code with a mobile phone.

[0079] (2) Add an NFC tag to the connection base and an NFC tag sensing device to the signal processing unit. When the signal processing unit is powered on and started, the signal processing unit automatically reads the information of the NFC tag on the connection base, and automatically completes the device configuration online.

[0080] In an optional embodiment, the electrical fire monitoring of the specified power distribution line in step S4 is based on the type of sensor and by selecting the appropriate type of signal processing unit, the following monitoring methods can be given:

[0081] (1) When the sensor is a residual current transformer, the signal processing unit performs residual current threshold monitoring.

[0082] (2) When the sensor is a residual current transformer and a load current transformer and a voltage sampling line, the signal processing unit performs residual current threshold monitoring, and one or a combination of DC component monitoring, non-intrusive load identification, and resistive leakage component monitoring. Among them:

[0083] 1) DC component monitoring: Based on the real-time monitoring data of the sensor, the signal processing unit calculates the DC component in the specified power distribution line and performs threshold alarm.

[0084] The formula for calculating the signal DC component is:

[0085]

[0086] Where, is the DC component of voltage, current or residual current, is the time series of load voltage monitored by the voltage sampling line, load current monitored by the load current transformer, or residual current monitored by the residual current transformer.

[0087] In actual product design, only the corresponding voltage, current, and residual current signals need to be filtered and connected to a chip with DC component calculation function, and the DC component data of the load voltage, load current, and residual current of the line can be obtained at the corresponding output pin.

[0088] It is additionally explained that the direct current component can cause transformer magnetic bias, vibration, and insulation winding heating of various electric appliances, accelerate insulation aging, and affect the action of leakage protection equipment, and is an electrical safety hazard. Therefore, the embodiment of the utility model introduces the above direct current component monitoring content.

[0089] 2) Non-intrusive load identification: through real-time monitoring data of the sensor, specific electrical equipment (such as voltage regulating sockets, air conditioners, and pure resistive heating devices) are identified based on a signal processing unit.

[0090] The implementation mainly defines the electric parameter change characteristics of the specific electrical equipment start-stop time, specifically refers to the fundamental wave, harmonic component, change absolute value, extreme value, and change percentage data characteristics of the load current signal monitored by the load current transformer within a few seconds, and the monitoring data is determined in real time. Since the determination methods in the prior art are various, this place is not limited to be unique.

[0091] 3) Resistive leakage component monitoring: through real-time monitoring data of the sensor, the resistive leakage component (also known as resistive residual power) in the specified distribution line is calculated based on a signal processing unit.

[0092] The calculation formula of the resistive leakage component is:

[0093] In a single-phase line, wherein is the single-phase resistive residual power, is the fire line voltage, is the residual current, is and is the phase angle difference.

[0094] In a three-phase line, wherein is the three-phase resistive residual power, , , are the voltages of the three-phase phase lines, is the residual current, A, B, and C correspond to , , and is the phase angle difference.

[0095] In actual product design, the signal processing unit uses the residual current signal monitored by the residual current transformer to replace the load current signal, and inputs the voltage signal monitored by the voltage sampling line into the electric energy metering chip, so that the chip pin originally (according to the original intention of the electric energy metering chip design) used to obtain active power obtains resistive residual power, and further residual active electric energy (resistive leakage electric energy) in a certain period can be obtained through the integrator. The unit electricity consumption corresponding to the resistive leakage electric energy formed by dividing the residual active electric energy of the distribution line in a certain period by the demand (average apparent power) of the line in the period can well correspond to the real fire risk of the line, and the index can be used for line electrical safety hazard degree sorting or threshold alarm.

[0096] (3) When the sensor is a residual current transformer and a temperature detector, the signal processing unit performs residual current threshold monitoring and over-temperature early warning monitoring based on the signal processing unit.

[0097] (4) When the sensor is a residual current transformer, a load current transformer, a voltage sampling line and a temperature detector, the signal processing unit performs residual current threshold monitoring, DC component monitoring, non-intrusive load identification, resistive leakage component monitoring, one or a combination of any of the above, and over-temperature early warning monitoring based on the signal processing unit.

[0098] It can be understood that the signal processing unit in the embodiment of the utility model can select a chip (for example, ATT7022EU) with simple circuit structure and single function, or a chip supporting higher intelligent function, increase the circuit structure, and integrate high-order electrical safety hazard monitoring functions that traditional electrical fire monitoring detectors cannot integrate, which is not limited to be unique.

[0099] In addition, it also needs to be supplemented that the split pre-installation type electrical fire monitoring method provided by the embodiment of the utility model precisely monitors as a kind of monitoring terminal deployment mode, which can reduce initial construction cost at the cost of increasing subsequent operation and maintenance cost, and therefore is preferably applicable to the user unit with relatively strong electrical operation and maintenance capacity but relatively tight budget to implement electrical fire monitoring.

[0100] In summary, compared with the prior art, the following beneficial effects are obtained:

[0101] 1. Compared with the single deployment mode of complete installation of sensors and signal processing units, the embodiment of the utility model reduces the amount of signal processing units, is high in flexibility and good in economy.

[0102] 2. The utility model discloses, the cover plate is installed above the second terminal group, with the signal line short circuit of mutual inductor, to ensure that mutual inductor is not in open circuit state when not through the connection base and the signal processing unit intercommunication. And, the cover plate and structure fastener form closed cavity, to protect the plug connection surface of connection base and signal processing unit, play dustproof waterproof effect.

[0103] 3. The utility model discloses under the premise of the limited number of signal processing units, the power distribution line of one or part more dangerous or more important to monitor is given priority to and carries out electrical fire monitoring, can promote the pertinence of electrical fire control resource investment, promotes electrical safety control work comprehensive efficiency.

[0104] 4. The utility model discloses based on the innovative structure of above-mentioned split preinstallation type electrical fire monitoring equipment, can significantly reduce the construction cost of step-by-step monitoring deployment mode dismantling and reinstallation link, improve the economy.

[0105] 5. The signal processing unit of the utility model discloses can select the chip of simple function single circuit structure, also can select the chip of supporting higher intelligent function, increase circuit structure, integrate the high -order electrical safety hidden danger monitoring function that traditional electrical fire monitoring detector cannot integrate.

[0106] 6. Because the equipment hardware cost in total cost is relative to construction cost and operation and maintenance expense, the proportion that occupies is much lower, and simultaneously considering the number of signal processing units is less, therefore, the cost difference between two different types of selection can be almost ignored in the influence of scheme economy, therefore, under the consideration of possible function upgrade of signal processing unit, the utility model discloses can make the user with less cost increase and obtain greater function benefit.

[0107] It should be noted that in this document, relationship terms such as first and second are used only to differentiate one entity or action from another, and do not necessarily require or imply these entities or actions are in any order from one another. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element preceded by "comprises... " does not, without more constraints, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the recited element.

[0108] The above examples are only used to illustrate the technical solutions of the present application, and are not intended to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can still be modified, or some technical features therein can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A split pre-installed electrical fire monitoring device, characterized in that, The connection base comprises a first terminal group, a second terminal group and a structure fastener. The first terminal group is connected with the second terminal group, the first terminal group is connected with the sensor, and the second terminal group is connected with the signal processing unit. The structure fastener is used for being installed on a wall body or in a distribution box body. The connection base comprises a cover plate.

2. The split pre-installation electrical fire monitoring device of claim 1, wherein, The cover plate is installed above the second terminal group and forms a closed cavity with the structure fastener. The connection base comprises a two-dimensional code or an NFC label, which is used for completing device configuration online. The sensor comprises a residual current transformer, and one or any combination of a load current transformer, a voltage sampling line and a temperature detector.

3. The split pre-installation electrical fire monitoring device of claim 2, wherein, ​ ​ 4. The split pre-installation electrical fire monitoring device of claim 1, wherein, ​ 5. The pre-installed electrical fire monitoring apparatus of claim 1, wherein ​

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