CN209132922U - The point-type flammable gas alarm of electromagnetism interference - Google Patents
The point-type flammable gas alarm of electromagnetism interference Download PDFInfo
- Publication number
- CN209132922U CN209132922U CN201822268920.8U CN201822268920U CN209132922U CN 209132922 U CN209132922 U CN 209132922U CN 201822268920 U CN201822268920 U CN 201822268920U CN 209132922 U CN209132922 U CN 209132922U
- Authority
- CN
- China
- Prior art keywords
- power supply
- circuit
- alarm
- flammable gas
- electromagnetic interference
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Emergency Alarm Devices (AREA)
Abstract
The utility model relates to a kind of point-type flammable gas alarms of electromagnetism interference, including 24V DC power supply, alarm internal circuit and the anti-electromagnetic interference circuit being connected between power supply and alarm internal circuit；Wherein anti-electromagnetic interference circuit further includes sequentially connected slow fuse wire, varistor, large capacity alminium electrolytic condenser, LC filter circuit, high pressure ceramic disc capacitor and DCDC isolated power supply, compared to traditional alarm, the utility model increases anti-electromagnetic interference circuit between power supply and alarm internal circuit, by filtering out the electromagnetic interference signal in working environment, it can prevent external electromagnetic interference from entering flammable gas alarm internal circuit, it ensure that flammable gas alarm under severe electromagnetic environment, reliably working, and then it ensure that industrial safe and reliable.
Description
Technical field
The utility model relates to a kind of flammable gas alarms, and in particular to a kind of point-type fuel gas of electromagnetism interference
Alarm.
Background technique
With the development of economy, to safety in production pay attention to day by day, flammable gas alarm is used as can in safety in production in China
The detection device of explosive gas is fired, quality is directly concerning the life security of shop personnel.Combustible gas alarm
Device belongs to industrial instrument, and various electromagnetic interferences, wireless signal, the radio of such as handset emissions can be flooded in use environment
Electric fast-pulse group congruences, lightning stroke, the static discharge etc. that FM FM signal, PLC control cabinet start and stop generate.These electromagnetic interferences are
Influence the key factor of flammable gas alarm reliability.Traditional flammable gas alarm structure is as shown in Figure 1, due to reporting
The power unit of alert device does not design electromagnetism interference equipment, directly powers for signal processing circuit and display circuit, thus externally
The electromagnetic interference resistivity of boundary's transmitting is lower, such as may interfere with the normal operation of alarm, thunder using mobile phone in workshop
Its damage may directly be caused by hitting, autumn and winter, dry, can if instrument service engineer's hand strap electrostatic touches alarm
It can cause its damage, inevitable electromagnetic interference directly affects the normal use of alarm.
Utility model content
Aiming at the shortcomings in the prior art, the purpose of the utility model is to provide a kind of point-type combustible gases of electromagnetism interference
Body alarm prevents external electromagnetic interference from entering flammable gas alarm internal circuit, to influence the normal use of alarm.
The purpose of this utility model adopts the following technical solutions realization:
A kind of point-type flammable gas alarm of electromagnetism interference, including power supply 1, alarm internal circuit 3 and connection
Anti-electromagnetic interference circuit 2 between power supply 1 and alarm internal circuit 3；Wherein anti-electromagnetic interference circuit 2 further includes successively connecting
Slow fuse wire 2-1, varistor 2-2, large capacity alminium electrolytic condenser 2-3, LC filter circuit 2-4, the high pressure tile electricity connect
Hold 2-5 and DCDC isolated power supply 2-6, the anti-electromagnetic interference circuit 2 is for filtering out electromagnetic interference signal, to protect alarm
Internal circuit 3 is influenced from electromagnetic interference signal.
Further, the power supply 1 is 24V DC power supply, for powering for alarm internal circuit 3.
Further, the alarm internal circuit 3 further includes the signal processing connecting respectively with anti-electromagnetic interference circuit 2
Circuit 3-1 and display circuit 3-2, wherein signal processing circuit 3-1 is for handling fuel gas detection signal and exporting alarm signal
Breath, fuel gas information and warning message of the display circuit 3-2 for display alarm detection.
Further, the slow fuse wire 2-1 is connected with power supply 1, disengagement failure power supply is used for, to protect alarm
Internal circuit.
Further, one end of the varistor 2-2 is connected with slow fuse wire 2-1, and other end ground connection is used for
Circuit bears to carry out voltage clamping when over-voltage, consumes unwanted currents.
Further, the large capacity alminium electrolytic condenser 2-3 is parallel to the both ends of varistor 2-2, described for filtering out
100Hz low-frequency ripple interference signal below in power supply 1.
Further, the LC filter circuit 2-4 is parallel to the both ends of large capacity alminium electrolytic condenser 2-3, for filtering out electricity
The high frequency ripple interference signal of 1kHz~10kHz in source 1.
Further, the high pressure ceramic disc capacitor 2-5 is in parallel with DCDC isolated power supply 2-6 as shunt capacitance, for filtering
Except the high-frequency interferencing signal for the 1GHz or more that power supply line introduces, and lightning stroke, electrostatic pulse signal.
Further, the DCDC isolated power supply 2-6 is connected with LC filter circuit 2-4, isolation voltage 1.5kVDC,
For isolated power supply 1 and alarm internal circuit 3, influence alarm internal circuit 3 by the failure of power supply 1.
Further, the alarm can work normally in electromagnetism interference indication range, the electromagnetism interference
Index are as follows:
Static discharge voltage ± 4kV；
Radio-frequency radiation field strength intensity: frequency 80MHz~1GHz, 10V/m；
Electrical fast transient (eft) voltage ± 2kV；
Be struck by lightning voltage ± 2kV.
Compared with the immediate prior art, technical solution provided by the present application be can include the following benefits:
A kind of point-type flammable gas alarm of electromagnetism interference provided by the utility model, compared to traditional alarm,
Anti-electromagnetic interference circuit is increased between power supply and alarm internal circuit, the circuit is by filtering out the electromagnetism in working environment
Interference signal can prevent external electromagnetic interference from entering flammable gas alarm internal circuit, ensure that flammable gas alarm exists
Under severe electromagnetic environment, reliably working be ensure that industrial safe and reliable.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is traditional flammable gas alarm structural schematic diagram；
Fig. 2 is electromagnetism interference point-type flammable gas alarm structural schematic diagram；
Fig. 3 is anti-electromagnetic interference circuit structure chart；
Appended drawing reference:
1- power supply；2- anti-electromagnetic interference circuit；3- alarm internal circuit；
The slow fuse wire of 2-1-；2-2- varistor；2-3- large capacity alminium electrolytic condenser；2-4-LC filter circuit；2-
5- high pressure ceramic disc capacitor；2-6-DCDC isolated power supply；
3-1- signal processing circuit；3-2- display circuit；
Specific embodiment
To keep the purpose of this utility model, technical solution and advantage clearer, below by the technology to the utility model
Scheme is described in detail.Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are not before making creative work
Obtained all other embodiment is put, the range that the utility model is protected is belonged to.
First optimal technical scheme
The point-type flammable gas alarm of a kind of electromagnetism interference provided by the utility model, on the basis of traditional alarm
On, electromagnetism interference design is increased in power unit, i.e., increases electromagnetism interference between power supply and alarm internal circuit
Circuit, which can prevent external electromagnetic interference from entering flammable gas alarm internal circuit, and then influence the normal of alarm
It uses.
Fig. 2 is electromagnetism interference point-type flammable gas alarm structural schematic diagram, as shown in Fig. 2, the fuel gas report
Alert device includes power supply 1, alarm internal circuit 3 and the electromagnetism interference being connected between power supply 1 and alarm internal circuit 3
Circuit 2.The power supply 1 is 24V DC power supply, for powering for alarm internal circuit 3.The anti-electromagnetic interference circuit 2 is used
In filtering out electromagnetic interference signal, to protect alarm internal circuit 3 to influence from electromagnetic interference signal.Electricity inside the alarm
Road 3 further includes the signal processing circuit 3-1 and display circuit 3-2 connecting respectively with anti-electromagnetic interference circuit 2；Wherein signal processing
Circuit 3-1 is for handling fuel gas detection signal and exporting warning message, and display circuit 3-2 is for display alarm detection
Fuel gas information and warning message.
Second optimal technical scheme
Fig. 3 is anti-electromagnetic interference circuit structure chart, as shown in figure 3, the anti-electromagnetic interference circuit 2 further includes that slow fusing is protected
Dangerous silk 2-1, varistor 2-2, large capacity alminium electrolytic condenser 2-3, LC filter circuit 2-4, high pressure ceramic disc capacitor 2-5 and DCDC every
From power supply 2-6；The slow fuse wire 2-1 is connected with power supply 1, is used for disengagement failure power supply, such as 24 DC power supply wiring
There are positive and negative anodes to be shorted, slow fuse wire 2-1 fuses at once, carries out reliably protecting to alarm internal circuit.It is described pressure-sensitive
Resistance 2-2 is parallel to the both ends of power supply 1, for carrying out voltage clamping when circuit bears over-voltage, consumes unwanted currents, pressure-sensitive electricity
Resistance is a kind of votage limit type protection device, and when overvoltage appears in two interpolars of varistor, varistor can be by voltage clamping
To a relatively-stationary voltage value.I.e. when up to several kilovolts of lightning strike signals enter alarm internal circuit by power supply line
When, when it passes through varistor, varistor can be connected in ns grades of time, by lightning strike signals consumption on varistor, with
Achieve the purpose that protect alarm internal circuit.The large capacity alminium electrolytic condenser 2-3 is parallel to the both ends of varistor 2-2,
For filtering out in 24V DC power supply frequency in 100Hz low-frequency ripple interference below.The LC filter circuit 2-4 is parallel to greatly
The both ends of capacity alminium electrolytic condenser 2-3, for filtering out frequency in power supply 1 in the high frequency ripple interference signal of 1kHz~10kHz, into
One step filters out the interference of the ripple in 24V DC power supply, and pure electric signal is provided for alarm internal circuit.The high pressure tile
Capacitor 2-5 is parallel to the both ends of DCDC isolated power supply 2-6 as shunt capacitance, for filtering out power supply line's pull-in frequency in 1GHz
Above high-frequency interferencing signal, while being used to filter out lightning stroke, electrostatic isopulse energy, to reach protection alarm internal circuit
Purpose.The DCDC isolated power supply 2-6 is connected with LC filter circuit 2-4, isolation voltage 1.5kVDC, have output overvoltage,
Short-circuit protection function, the both ends also shunt capacitance C2 of the DCDC isolated power supply 2-6, for filtering out 1kV ripple voltage below
Interference, external power supply power supply is isolated with alarm internal circuit by DCDC isolated power supply 2-6, so that external power supply is sent out
When changing, the reliably working of alarm internal circuit is not influenced, further increases the functional reliability of alarm.
Third optimal technical scheme
Anti-electromagnetic interference circuit structure chart as shown in Figure 3, the preferred 1A/63V of model of slow fuse wire F0, pressure in figure
The preferred 330uF/50V of model of the preferred 14D470K of model of quick resistance R1, large capacity alminium electrolytic condenser C0, in LC filter circuit,
The model of the preferred 1uF/50V of capacitor C1 model, the preferred 4.7uH/650W of inductance L1 model, high pressure ceramic disc capacitor CY1, CY2 are preferred
The preferred VRB2412YMD-6WR2 of model of 1nF/2kV, DCDC isolated power supply VR1, capacitor C2 model preferred 10uF/25V, Fig. 3
In, anti-electromagnetic interference circuit is powered by 24V DC power supply, and electric power outputting current enters circuit through slow fuse wire F0, successively
By varistor R1, large capacity alminium electrolytic condenser C0, the LC filter circuit being made of C1 and L1, high pressure ceramic disc capacitor CY1,
CY2, DCDC isolated power supply VR1 and the capacitor C2 for being connected in parallel on the both ends DCDC isolated power supply VR1, will finally filter out electromagnetic interference
The signal processing circuit and display circuit that signal is transferred to alarm internal circuit are made by the anti-electromagnetic interference circuit in Fig. 3
The utility model compared to traditional flammable gas alarm, can under severe electromagnetic environment reliably working.By anti-electricity
Processing of the magnetic disturbance circuit to electromagnetic interference signal enables the flammable gas alarm of the utility model in following anti-electromagnetism
It interferes in indication range and works normally, electromagnetism interference index are as follows:
1, static discharge voltage ± 4kV；
2, radio-frequency radiation field strength intensity reaches frequency 80MHz~1GHz, 10V/m；
3, electrical fast transient (eft) voltage ± 2kV；
4, be struck by lightning voltage ± 2kV.
The utility model avoids the influence of electromagnetic interference, to ensure that flammable gas alarm in severe electromagnetism ring
Under border, reliably working be ensure that industrial safe and reliable.
Above description is only a specific implementation of the present invention, but the protection scope of the utility model is not limited to
In this, anyone skilled in the art within the technical scope disclosed by the utility model, can readily occur in variation
Or replacement, it should be covered within the scope of the utility model.Therefore, the protection scope of the utility model should be with the power
Subject to the protection scope that benefit requires.
Claims (10)
1. a kind of point-type flammable gas alarm of electromagnetism interference, which is characterized in that including electricity inside power supply (1), alarm
Road (3) and the anti-electromagnetic interference circuit (2) being connected between power supply (1) and alarm internal circuit (3)；Wherein anti-electromagnetism is dry
Disturbing circuit (2) further includes sequentially connected slow fuse wire (2-1), varistor (2-2), large capacity alminium electrolytic condenser (2-
3), LC filter circuit (2-4), high pressure ceramic disc capacitor (2-5) and DCDC isolated power supply (2-6), the anti-electromagnetic interference circuit
(2) for filtering out electromagnetic interference signal, to protect alarm internal circuit (3) to influence from electromagnetic interference signal.
2. flammable gas alarm according to claim 1, which is characterized in that the power supply (1) is 24V DC power supply,
For powering for alarm internal circuit (3).
3. flammable gas alarm according to claim 1, which is characterized in that the alarm internal circuit (3) is also wrapped
The signal processing circuit (3-1) connecting respectively with anti-electromagnetic interference circuit (2) and display circuit (3-2) are included, wherein signal processing
Circuit (3-1) for handling fuel gas detection signal and exporting warning message, examine for display alarm by display circuit (3-2)
The fuel gas information and warning message of survey.
4. flammable gas alarm according to claim 1, which is characterized in that the slow fuse wire (2-1) and electricity
Source (1) is connected, and disengagement failure power supply is used for, to protect alarm internal circuit.
5. flammable gas alarm according to claim 1, which is characterized in that one end of the varistor (2-2) with
Slow fuse wire (2-1) is connected, and other end ground connection consumes extra electricity for carrying out voltage clamping when circuit bears over-voltage
Stream.
6. flammable gas alarm according to claim 1, which is characterized in that the large capacity alminium electrolytic condenser (2-3)
The both ends of varistor (2-2) are parallel to, for filtering out 100Hz low-frequency ripple interference signal below in the power supply (1).
7. flammable gas alarm according to claim 1, which is characterized in that the LC filter circuit (2-4) is parallel to
The both ends of large capacity alminium electrolytic condenser (2-3), for filtering out the high frequency ripple interference signal of 1kHz~10kHz in power supply (1).
8. flammable gas alarm according to claim 1, which is characterized in that high pressure ceramic disc capacitor (2-5) conduct
Shunt capacitance is in parallel with DCDC isolated power supply (2-6), the high-frequency interferencing signal of the 1GHz or more for filtering out power supply line's introducing,
And lightning stroke, electrostatic pulse signal.
9. flammable gas alarm according to claim 1, which is characterized in that the DCDC isolated power supply (2-6) and LC
Filter circuit (2-4) is connected, isolation voltage 1.5kVDC, for isolated power supply (1) and alarm internal circuit (3), makes to report
Alert device internal circuit (3) are not influenced by the failure of power supply (1).
10. flammable gas alarm according to claim 1, which is characterized in that the alarm can be dry in anti-electromagnetism
It disturbs in indication range and works normally, the electromagnetism interference index are as follows:
Static discharge voltage ± 4kV；
Radio-frequency radiation field strength intensity: frequency 80MHz~1GHz, 10V/m；
Electrical fast transient (eft) voltage ± 2kV；
Be struck by lightning voltage ± 2kV.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822268920.8U CN209132922U (en) | 2018-12-29 | 2018-12-29 | The point-type flammable gas alarm of electromagnetism interference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822268920.8U CN209132922U (en) | 2018-12-29 | 2018-12-29 | The point-type flammable gas alarm of electromagnetism interference |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209132922U true CN209132922U (en) | 2019-07-19 |
Family
ID=67249780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822268920.8U Active CN209132922U (en) | 2018-12-29 | 2018-12-29 | The point-type flammable gas alarm of electromagnetism interference |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209132922U (en) |
-
2018
- 2018-12-29 CN CN201822268920.8U patent/CN209132922U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103606483B (en) | Vacuum degree monitoring device for high voltage vacuum circuit breaker arc extinguish chamber | |
| CN104638629B (en) | Divide the symmetrical overvoltage lightning protection circuit of triggering | |
| CN206164354U (en) | Power lightning protection circuit and power adapter | |
| CN103414155A (en) | Neutral point installation electronic type rapid harmonic-vibration eliminating device | |
| CN206135409U (en) | Novel convenient practical arc extinction harmonic elimination and overvoltage protection three way device | |
| CN209132922U (en) | The point-type flammable gas alarm of electromagnetism interference | |
| CN210295399U (en) | Comprehensive microcomputer resonance elimination device capable of achieving WIFI communication | |
| CN205620504U (en) | 10 passive warning monitoring arrangement of kilovolt arrester insulation breakdown | |
| CN201868869U (en) | Combined type large-capacity self-separating overvoltage protector | |
| CN204741609U (en) | Electronic ballast suitable for metal halogen lamp | |
| CN102608459B (en) | Status monitoring method for spark gap trigger circuit | |
| CN203103948U (en) | Controller for arc extinction and over-voltage protection device | |
| CN207099409U (en) | Electric ballast with surge protection circuit | |
| CN105958463A (en) | Single-chip microcomputer-based lightning protection online detection integrated box and lightning protection detection method thereof | |
| CN103885343A (en) | Wireless gateway device with explosion suppression and electromagnetic shielding function | |
| CN205811540U (en) | A kind of SCM Based lightning protection on-line checking integrated box | |
| CN202014076U (en) | Protection device for arc faults | |
| CN202888821U (en) | A network signal surge protective device | |
| CN209516624U (en) | A kind of combined lightning protection device with detection warning function | |
| CN102055182B (en) | Lightening protector without ground wire | |
| CN202678942U (en) | Overvoltage protection capacitor apparatus | |
| CN206057421U (en) | A kind of industrial and mineral type locomotive storage battery low-voltage warning circuit | |
| CN102738774A (en) | Overvoltage protection capacitor device | |
| CN213091706U (en) | Connecting structure of alternating current component online monitoring device connected in series in direct current system | |
| CN109089366A (en) | Electric ballast with surge protection circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |