CN218919962U - Protection device for weak current system voltage abnormality - Google Patents
Protection device for weak current system voltage abnormality Download PDFInfo
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- CN218919962U CN218919962U CN202222065725.1U CN202222065725U CN218919962U CN 218919962 U CN218919962 U CN 218919962U CN 202222065725 U CN202222065725 U CN 202222065725U CN 218919962 U CN218919962 U CN 218919962U
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Abstract
The utility model discloses a protection device for weak current system voltage abnormality, comprising: the input end of the device is connected with the output end of the circuit to be protected and is used for receiving the operation signal of the circuit to be protected; the output end of the device is connected with the input end of the circuit to be protected and is used for transmitting the protection signal of the protection device to the circuit to be protected; the multifunctional universal meter is connected with the relays and used for detecting the voltage of a circuit to be protected, and switching the closing state of each relay through the comparison result of the voltage and a preset voltage threshold value to determine different protection loops. The utility model is portable and easy to operate, acts rapidly in the protection process, has wide voltage detection range, can be repeatedly used, is simple to operate, and has no interference to the system; the simultaneous detection of alternating current and direct current and the automatic system reset can be realized; the weak current system of abnormal voltage is prevented from being continuously infringed, and the system stability is ensured.
Description
Technical Field
The utility model relates to the field of weak current and fire protection, in particular to a protection device for voltage abnormality of a weak current system.
Background
At present, in the weak current, fire protection field and secondary control loop system, after the installation of the weak current system is completed, system debugging is required, and the system is in an unstable state in the debugging stage. However, in the debugging process, the weak current system is often miswired due to drawing errors, negligence of constructors and the like, the system is influenced, meanwhile, because voltage which is abnormally operated in the debugging stage is invaded into the system due to system software loopholes, hardware anomalies, low-voltage professional cross wiring and the like, equipment insurance and a power module can be burnt out when the voltage is light, and a large amount of equipment of the system can be burnt out when the voltage is heavy. The equipment is damaged on site, the stability of the equipment is affected, the cost is increased, and the construction period of the system is delayed due to the problem of equipment maintenance and replacement.
Disclosure of Invention
Therefore, the embodiment of the utility model provides a protection device for voltage abnormality of a weak current system, which solves the problem that in the prior art, the system is unstable, so that abnormal working voltage invades the system.
According to a first aspect, an embodiment of the present utility model provides a protection device for voltage abnormality of a weak current system, where the protection device adopts a double-deck platform structure, and the protection device includes: the device input end, the device output end and the internal device, wherein the internal device comprises a multifunctional multimeter and a plurality of relays,
the input end of the device is connected with the output end of the circuit to be protected and is used for receiving the operation signal of the circuit to be protected;
the output end of the device is connected with the input end of the circuit to be protected and is used for transmitting the protection signal of the protection device to the circuit to be protected;
the multifunctional universal meter is connected with the relays and is used for detecting the voltage of the circuit to be protected, and switching the closing state of each relay through the comparison result of the voltage and a preset voltage threshold value to determine different protection loops.
The protection device for the voltage abnormality of the weak current system provided by the embodiment of the utility model is portable and easy to operate, acts rapidly in the protection process, has a wide voltage detection range, can be repeatedly used, is simple to operate, has no interference to the system, and has an alarm function. The simultaneous detection of alternating current and direct current and the automatic system reset can be realized; the weak current system of abnormal voltage is prevented from being continuously infringed, and the system stability is ensured.
With reference to the first aspect, in a first implementation manner of the first aspect, the protection device further includes: and the parameter setter is used for setting the preset voltage threshold value of the line to be protected.
With reference to the first aspect, in a second implementation manner of the first aspect, the protection device further includes: a polycarbonate housing for encapsulating the internal device, wherein,
the polycarbonate housing further includes a plurality of heat dissipation holes to enable heat dissipation from the internal device.
With reference to the first aspect, in a third implementation manner of the first aspect, the protection device further includes: and the alarm is used for alarming the voltage abnormality of the circuit to be protected.
With reference to the first aspect, in a fourth implementation manner of the first aspect, the protection device further includes: and the reset device is connected with the internal device and is used for disconnecting the protection loop through the reset device after the voltage detected by the multifunctional universal meter and the preset voltage threshold meet preset requirements so as to recover the access state of the weak current system.
With reference to the first aspect, in a fifth implementation manner of the first aspect, the protection device further includes: and the external power supply is used for supplying power to the internal device.
The protection device for the voltage abnormality of the weak current system provided by the embodiment of the utility model is portable and easy to operate, acts rapidly in the protection process, has a wide voltage detection range, can be repeatedly used, is simple to operate, has no interference to the system, and has an alarm function. The simultaneous detection of alternating current and direct current and the automatic system reset can be realized; the weak current system of abnormal voltage is prevented from being continuously infringed, and the system stability is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a protection device for weak current system voltage anomalies according to an embodiment of the utility model;
FIG. 2 is a schematic diagram of another weak current system voltage anomaly protection device in accordance with a preferred embodiment of the present utility model;
FIG. 3 is a schematic view showing a partial structure of a protection device for weak current system voltage abnormality according to a preferred embodiment of the present utility model;
FIG. 4-1 is a circuit under test of a protection device for weak current system voltage anomalies in accordance with a preferred embodiment of the present utility model;
FIG. 4-2 is a control loop of a protection device for weak current system voltage anomalies in accordance with a preferred embodiment of the present utility model;
fig. 4-3 are detection loops of a protection device for weak current system voltage anomalies according to a preferred embodiment of the present utility model.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In practical application, in the weak current, fire protection field and secondary control loop system, when the system is just installed, the system is in an unstable stage of system debugging, wrong lines are often caused by drawing errors, negligence of constructors and the like, abnormal voltages which are caused by system software loopholes, incomplete, abnormal hardware, low-voltage professional cross wiring and the like and work abnormally in the debugging stage invade the system, equipment insurance and a power module are burnt out if the voltage is light, and a large number of equipment of the system is burnt out if the voltage is heavy. The equipment is damaged on site, the cost is increased, the construction period is delayed due to equipment maintenance and replacement, and the stability of the equipment can be even affected.
In this embodiment, a protection device for voltage abnormality of a weak current system is also provided, and as used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. While the means described in the following embodiments are preferably implemented in software, implementation in hardware, or a combination of software and hardware, is also possible and contemplated.
The utility model discloses a protection device for weak current system voltage abnormality, which is suitable for subway weak current system, as shown in figure 1, the output port (1) of weak current, fire protection circuit and other protection circuit, the input port (2) of terminal equipment or module, the protection device of the embodiment comprises: device input (3), device output (4), internal device (01), wherein, internal device includes multi-functional universal meter (7) and a plurality of relay, including relay KA1 (5), relay KA2 (6) to the protection device that this embodiment provided can satisfy 0-380V, AC/DC (alternating current, direct current) voltage detection, sets up the function of protection range.
The device input end (3) is connected with the output end (1) of the circuit to be protected and is used for receiving the operation signal of the circuit to be protected; the device output end (4) is connected with the input end (2) of the circuit to be protected and is used for transmitting the protection signal of the protection device to the circuit to be protected; the multifunctional universal meter (7) is connected with the relays and used for detecting the voltage of a circuit to be protected, and switching the closing state of each relay through the comparison result of the voltage and a preset voltage threshold value to determine different protection loops.
It should be noted that the protection device may determine one protection circuit, or may implement protection of multiple circuits by adding input and output ports and relay KA as required. Specifically, the protection device provided in this embodiment can realize a function of controlling a higher voltage loop by changing the intermediate relay to a contactor.
The protection device for the voltage abnormality of the weak current system, which is provided by the embodiment, is portable and easy to operate, acts rapidly in the protection process, has a wide voltage detection range, can be repeatedly used, is simple to operate, has no interference to the system, and has an alarm function. The simultaneous detection of alternating current and direct current and the automatic system reset can be realized; the weak current system of abnormal voltage is prevented from being continuously infringed, and the system stability is ensured.
The protection device in this embodiment further includes an alarm (8), a restorer (9), a parameter setter (12), a polycarbonate housing (13) and an external power supply (11), as shown in fig. 2, where the alarm (8) is used to alarm the voltage abnormality of the circuit to be protected (the detected circuit). And the reset device (9) is connected with the internal device and is used for disconnecting the protection loop through the reset device and recovering the access state of the weak current system after the voltage detected by the multifunctional universal meter (7) and the preset voltage threshold meet the preset requirements.
Specifically, as shown in fig. 3, the protection device for weak current system voltage abnormality provided in this embodiment further includes: and the polycarbonate housing (13) is used for packaging the internal devices, wherein the polycarbonate housing (13) further comprises a plurality of heat dissipation holes (14) for realizing heat dissipation of the internal devices.
The method comprises the steps that a preset voltage threshold value of a circuit to be protected is set through a parameter setter (12); the power supply is carried out on the internal devices through an external power supply (11). Besides the power supply mode of the external power supply, the mode of power supply inside the storage battery can be adopted, so that portability is improved.
The protection device of this embodiment is by device input (detection) end (3), and output (4) of device connect wait output (1), input (2) of protection circuit, and the device user only need select through (set button) parameter setting ware (12) to set for the detection range, has equivalent security. The connection work is simple, convenient and reliable, and the requirements on the technical level of constructors can be reduced. The device is quick in response, the response time is 15-100ms of the action time of the relay, the condition that the equipment main board is burnt out due to voltage abnormality can be greatly avoided, the consequences caused by insufficient experience of workers, abnormal equipment, abnormal power supply and the like can be reduced in construction and debugging engineering, the construction efficiency is improved, the detected equipment is protected, and the requirements of practical engineering can be guaranteed, and the device is safe and reliable.
The working principle of the protection device is as follows: as shown in fig. 4-1, the relay KA2 in the device is connected in series to detect the circuit, and in a normal state, the relay KA2 maintains a channel state, and the circuit to be protected is normally powered. As shown in fig. 4-3, the detection range is set by the multifunctional multimeter (7), and when the detected voltage exceeds the detection range, the multifunctional multimeter outputs a control signal to act on the relay KA1. As shown in fig. 4-2, after the KA1 obtains the control signal, the control signal is converted from an open state to a channel state, the KA2 is converted into a switch state due to the closing of a circuit, at this time, the detected loop is disconnected, the external circuit continuously supplies power to the KA2, the KA2 is kept in an existing state, and an alarm (buzzer) continuously alarms. When the circuit is recovered normally and needs to be reset as shown in fig. 4-2, a reset device (reset button) is pressed, the circuit is disconnected, KA2 is powered off, the state before the circuit is recovered, the detected circuit is recovered to the state of the circuit as shown in fig. 4-1, and the reset is completed. It should be noted that, in the present embodiment, the protection device and the corresponding loop circuit diagram for protecting the weak current system from voltage abnormality only, and the specific control method is that the prior art is not in the protection scope of the present embodiment.
The protection device for the voltage abnormality of the weak current system, which is provided by the embodiment, is portable and easy to operate, acts rapidly in the protection process, has a wide voltage detection range, can be repeatedly used, is simple to operate, has no interference to the system, and has an alarm function. The simultaneous detection of alternating current and direct current and the automatic system reset can be realized; the weak current system for protecting abnormal voltage is continuously infringed, the system stability is ensured, the purpose of alarming an operator is achieved, the method is particularly suitable for the debugging stage of weak current and unstable fire-fighting system, and the condition that high voltage invades and damages equipment caused by human factors, hardware, software and other problems can be greatly prevented.
Claims (6)
1. The utility model provides a protection device of weak current system voltage abnormality which characterized in that includes: the device input end, the device output end and the internal device, wherein the internal device comprises a multifunctional multimeter and a plurality of relays,
the input end of the device is connected with the output end of the circuit to be protected and is used for receiving the operation signal of the circuit to be protected;
the output end of the device is connected with the input end of the circuit to be protected and is used for transmitting the protection signal of the protection device to the circuit to be protected;
the multifunctional universal meter is connected with the relays and is used for detecting the voltage of the circuit to be protected, and switching the closing state of each relay through the comparison result of the voltage and a preset voltage threshold value to determine different protection loops.
2. The protection device of claim 1, further comprising: and the parameter setter is used for setting the preset voltage threshold value of the line to be protected.
3. The protection device of claim 1, further comprising: a polycarbonate housing for encapsulating the internal device, wherein,
the polycarbonate housing further includes a plurality of heat dissipation holes to enable heat dissipation from the internal device.
4. The protection device of claim 1, further comprising: and the alarm is used for alarming the voltage abnormality of the circuit to be protected.
5. The protection device of claim 1, further comprising: and the reset device is connected with the internal device and is used for disconnecting the protection loop through the reset device after the voltage detected by the multifunctional universal meter and the preset voltage threshold meet preset requirements so as to recover the access state of the weak current system.
6. The protection device of claim 1, further comprising: and the external power supply is used for supplying power to the internal device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222065725.1U CN218919962U (en) | 2022-08-08 | 2022-08-08 | Protection device for weak current system voltage abnormality |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222065725.1U CN218919962U (en) | 2022-08-08 | 2022-08-08 | Protection device for weak current system voltage abnormality |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218919962U true CN218919962U (en) | 2023-04-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222065725.1U Active CN218919962U (en) | 2022-08-08 | 2022-08-08 | Protection device for weak current system voltage abnormality |
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| Country | Link |
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| CN (1) | CN218919962U (en) |
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2022
- 2022-08-08 CN CN202222065725.1U patent/CN218919962U/en active Active
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