CN211266782U - Switching circuit for fire-fighting special switch - Google Patents
Switching circuit for fire-fighting special switch Download PDFInfo
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- CN211266782U CN211266782U CN201922292861.2U CN201922292861U CN211266782U CN 211266782 U CN211266782 U CN 211266782U CN 201922292861 U CN201922292861 U CN 201922292861U CN 211266782 U CN211266782 U CN 211266782U
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Abstract
The utility model provides a special switch converting circuit of fire control relates to power electronics's technical field, include: the circuit comprises a rectifier bridge, a filter circuit, a voltage regulator tube D1, a triode Q1, a photoelectric coupler U1, a third capacitor C3 and a fourth resistor R4; the input end of the rectifier bridge is connected with an external power supply; the output end of the rectifier bridge is connected with the filter circuit; the filter circuit is connected with the cathode of a voltage regulator tube D1, and the anode of a voltage regulator tube D1 is connected with one end of a fourth resistor R4; the other end of the fourth resistor R4 is connected with the base electrode of the triode Q1; the emitter of the triode Q1 is grounded, and the collector of the triode Q1 is connected with the input end of the photoelectric coupler U1; the output end of the photoelectric coupler U1 is connected with one end of a third capacitor C3, and the other end of the third capacitor C3 is grounded; the filter circuit and the photoelectric coupler U1 are connected with an external power supply. The utility model provides a special switch converting circuit of fire control passes through photoelectric isolation and starts the threshold, has improved the reliability of special switch converting circuit of fire control among the prior art.
Description
Technical Field
The utility model belongs to the technical field of the power electronic technology and specifically relates to a special switch converting circuit of fire control is related to.
Background
According to the requirement of national mandatory standards, the automatic transfer switching equipment is required to be used in some fire-fighting related places, so the automatic transfer switching equipment has certain linkage capacity with fire-fighting facilities.
The automatic transfer switch fire-fighting special module on the market at present often has the following problems:
1) has no isolation capability and is easy to cause personal injury to users.
2) The starting device does not have a certain starting threshold, and is easy to trigger by mistake.
3) The lightning surge suppression device has no capability of suppressing the lightning surge and is easy to damage.
4) The common use of ac/dc signals cannot be realized.
5) And the wiring lightning protection design cannot be realized.
In summary, the safety and reliability of the special fire protection module of the transfer switch in the prior art need to be improved.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a special switch converting circuit of fire control to improve the interference killing feature and the reliability of the special module of converting switch fire control among the prior art, and reduced the cost of the special module of prior art converting switch fire control.
In a first aspect, an embodiment of the present invention provides a special switch converting circuit for fire protection, including: the circuit comprises a rectifier bridge, a filter circuit, a voltage regulator tube D1, a triode Q1, a photoelectric coupler U1, a third capacitor C3 and a fourth resistor R4;
the input end of the rectifier bridge is connected with an external power supply;
the output end of the rectifier bridge is connected with the filter circuit;
the filter circuit is connected with the cathode of the voltage regulator tube D1, and the anode of the voltage regulator tube D1 is connected with one end of the fourth resistor R4;
the other end of the fourth resistor R4 is connected with the base of the triode Q1;
the emitter of the triode Q1 is grounded, and the collector of the triode Q1 is connected with the input end of the optoelectronic coupler U1;
the output end of the photoelectric coupler U1 is connected with one end of a third capacitor C3, and the other end of the third capacitor C3 is grounded;
the filter circuit and the photoelectric coupler U1 are connected with an external power supply.
Preferably, the filter circuit comprises a first capacitor C1 and a fifth resistor R5;
one end of the first capacitor C1 is connected with an external power supply, and the other end of the first capacitor C1 is grounded;
one end of the fifth resistor R5 is respectively connected with one end of the first capacitor and the cathode of the voltage regulator tube D1;
the other end of the fifth resistor R5 is grounded.
Preferably, the rectifier bridge further comprises a surge protector D2, wherein one end of the surge protector D2 is connected with one end of the output end of the rectifier bridge;
the other end of the surge protector D2 is connected with the other end of the output end of the rectifier bridge.
Preferably, the transistor Q1 is an NPN transistor.
The embodiment of the utility model provides a following beneficial effect has been brought: the utility model provides a special switch converting circuit of fire control, include: the circuit comprises a rectifier bridge, a filter circuit, a voltage regulator tube D1, a triode Q1, a photoelectric coupler U1, a third capacitor C3 and a fourth resistor R4; the input end of the rectifier bridge is connected with an external power supply; the output end of the rectifier bridge is connected with the filter circuit; the filter circuit is connected with the cathode of a voltage regulator tube D1, and the anode of a voltage regulator tube D1 is connected with one end of a fourth resistor R4; the other end of the fourth resistor R4 is connected with the base electrode of the triode Q1; the emitter of the triode Q1 is grounded, and the collector of the triode Q1 is connected with the input end of the photoelectric coupler U1; the output end of the photoelectric coupler U1 is connected with one end of a third capacitor C3, and the other end of the third capacitor C3 is grounded; the filter circuit and the photoelectric coupler U1 are connected with an external power supply. Through the utility model provides a special switch converting circuit of fire control has realized photoelectric isolation to set up the start threshold, improved the special switch converting circuit of fire control's among the prior art reliability and staff's security.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a circuit diagram of a switch switching circuit dedicated for fire protection provided by an embodiment of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The special module of change over switch fire control among the prior art is because unable realization is kept apart, can't set up the start threshold simultaneously, therefore reliability and security remain to be improved, consequently, based on this, the embodiment of the utility model provides a special switch converting circuit of fire control can improve the interference killing feature and the reliability of the special module of change over switch fire control among the prior art to the cost of the special module of prior art change over switch fire control has been reduced.
In order to understand the present embodiment, a switching circuit for fire protection, which is disclosed in the embodiments of the present invention, is first described in detail.
The first embodiment is as follows:
the embodiment of the utility model provides a special switch converting circuit of fire control is provided, include: the circuit comprises a rectifier bridge, a filter circuit, a voltage regulator tube D1, a triode Q1, a photoelectric coupler U1, a third capacitor C3 and a fourth resistor R4;
the input end of the rectifier bridge is connected with an external power supply;
the output end of the rectifier bridge is connected with the filter circuit;
the filter circuit is connected with the cathode of the voltage regulator tube D1, and the anode of the voltage regulator tube D1 is connected with one end of the fourth resistor R4;
the other end of the fourth resistor R4 is connected with the base of the triode Q1;
the emitter of the triode Q1 is grounded, and the collector of the triode Q1 is connected with the input end of the optoelectronic coupler U1;
the output end of the photoelectric coupler U1 is connected with one end of a third capacitor C3, and the other end of the third capacitor C3 is grounded;
the filter circuit and the photoelectric coupler U1 are connected with an external power supply.
It should be noted that, in the embodiment provided by the present invention, in order to filter the output end of the rectifier bridge, the filter circuit includes a first capacitor C1 and a fifth resistor R5;
one end of the first capacitor C1 is connected with an external power supply, and the other end of the first capacitor C1 is grounded;
one end of the fifth resistor R5 is respectively connected with one end of the first capacitor and the cathode of the voltage regulator tube D1;
the other end of the fifth resistor R5 is grounded;
the utility model provides an embodiment, still include surge protector D2, one end of the said surge protector D2 links to each other with one end of the output end of the said rectifier bridge;
the other end of the surge protector D2 is connected with the other end of the output end of the rectifier bridge;
specifically, the surge protector D2 is used to ensure that a voltage-sensitive device at the output end of the rectifier bridge is not damaged by an overvoltage when the voltage input at the input end of the rectifier bridge is higher than a threshold value or when a circuit is abnormal;
furthermore, a seventh resistor R7 is connected in parallel to two ends of the third capacitor C3, that is, one end of the seventh resistor R7 is connected to one end of the third capacitor C3, and the other end of the seventh resistor R7 is grounded; a fourth capacitor C4 is connected between the external power supply and the ground in series.
Preferably, the transistor Q1 is an NPN transistor;
it should be noted that, in the embodiment provided by the present invention, the present invention further includes a second capacitor C2 and a sixth resistor R6, one end of the second capacitor C2 is connected to the input end of the photocoupler U1, the other end of the second capacitor C2 is grounded, one end of the sixth resistor R6 is connected to the anode of the voltage regulator D1, and the other end of the sixth resistor R6 is grounded.
Example two:
the embodiment of the utility model provides a second mode of operation of aforementioned special switch converting circuit for fire control, specifically, behind the filter circuit, stabilivolt D1, when the direct current voltage of the output of rectifier bridge was greater than stabilivolt steady voltage value, trigger triode Q1 worked, and then trigger optoelectronic coupler U1 worked, and third electric capacity C3 continued the power supply at this moment, triggered the fire alarm in the picture to send out the police dispatch newspaper;
the utility model provides an in the embodiment, external power supply's voltage is 3.3V, and optoelectronic coupler U1's effect is kept apart input and output, reaches the purpose that the signal can not mutual interference, also can improve user's people simultaneously.
The utility model has the advantages of as follows:
1) the rectifier bridge is utilized to realize the universal AC/DC signal which can not be realized by the existing fire-fighting module
2) The signal isolation is realized by using the photoelectric coupler, and the safety of the fire-fighting module in the prior art is improved;
3) the avalanche effect of the voltage stabilizing tube is utilized to set a starting threshold, and the possibility of misoperation is reduced.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the system and the apparatus described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In addition, in the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element 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 invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the technical solution of the present invention, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: those skilled in the art can still modify or easily conceive of changes in the technical solutions described in the foregoing embodiments or make equivalent substitutions for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (4)
1. A fire control special switch converting circuit is characterized by comprising: the circuit comprises a rectifier bridge, a filter circuit, a voltage regulator tube D1, a triode Q1, a photoelectric coupler U1, a third capacitor C3 and a fourth resistor R4;
the input end of the rectifier bridge is connected with an external power supply;
the output end of the rectifier bridge is connected with the filter circuit;
the filter circuit is connected with the cathode of the voltage regulator tube D1, and the anode of the voltage regulator tube D1 is connected with one end of the fourth resistor R4;
the other end of the fourth resistor R4 is connected with the base of the triode Q1;
the emitter of the triode Q1 is grounded, and the collector of the triode Q1 is connected with the input end of the optoelectronic coupler U1;
the output end of the photoelectric coupler U1 is connected with one end of a third capacitor C3, and the other end of the third capacitor C3 is grounded;
the filter circuit and the photoelectric coupler U1 are connected with an external power supply.
2. The circuit of claim 1, wherein the filter circuit comprises a first capacitor C1 and a fifth resistor R5;
one end of the first capacitor C1 is connected with an external power supply, and the other end of the first capacitor C1 is grounded;
one end of the fifth resistor R5 is respectively connected with one end of the first capacitor and the cathode of the voltage regulator tube D1;
the other end of the fifth resistor R5 is grounded.
3. The circuit of claim 1, further comprising a surge protector D2, wherein one end of the surge protector D2 is connected to one end of the output terminal of the rectifier bridge;
the other end of the surge protector D2 is connected with the other end of the output end of the rectifier bridge.
4. The circuit of claim 1, wherein the transistor Q1 is an NPN transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922292861.2U CN211266782U (en) | 2019-12-19 | 2019-12-19 | Switching circuit for fire-fighting special switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922292861.2U CN211266782U (en) | 2019-12-19 | 2019-12-19 | Switching circuit for fire-fighting special switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211266782U true CN211266782U (en) | 2020-08-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922292861.2U Active CN211266782U (en) | 2019-12-19 | 2019-12-19 | Switching circuit for fire-fighting special switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211266782U (en) |
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2019
- 2019-12-19 CN CN201922292861.2U patent/CN211266782U/en active Active
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