CN107301758A - A kind of hydrogen prior-warning device - Google Patents
A kind of hydrogen prior-warning device Download PDFInfo
- Publication number
- CN107301758A CN107301758A CN201710672469.3A CN201710672469A CN107301758A CN 107301758 A CN107301758 A CN 107301758A CN 201710672469 A CN201710672469 A CN 201710672469A CN 107301758 A CN107301758 A CN 107301758A
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- China
- Prior art keywords
- alarm device
- palladium
- hydrogen
- graphene
- inductive reactance
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Classifications
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
- G08B21/12—Alarms for ensuring the safety of persons responsive to undesired emission of substances, e.g. pollution alarms
- G08B21/16—Combustible gas alarms
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C17/00—Apparatus or processes specially adapted for manufacturing resistors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
Abstract
The invention discloses a kind of hydrogen alarm device, it is characterised in that including hydrogen inductive reactance, fixed value resistance, control circuit, power supply, heating plate, siren, relay, shell and shift knob.The inductive reactance is made up of palladium graphene oxidized graphite composite material, and the mass ratio of the palladium graphene oxidized graphite composite material is 1：5~30：10~100.Present invention also offers the preparation method of the inductive reactance.The beneficial effects of the invention are as follows：Apparatus structure is simple, and raw material and production cost are low, control siren not trigger safety problem by relay, can be used under hydrogen environment.
Description
Technical field
The present invention relates to gas alarm device, more particularly to a kind of hydrogen prior-warning device.
Background technology
Hydrogen is known most light gas, and hydrogen has flammable and reproducibility in the world, thus petrochemical industry,
Electronics industry, metallurgical industry and aerospace field have a wide range of applications.However, hydrogen diffusion velocity is very fast, it is high in high temperature
In the environment of pressure, hydrogen even can penetrate very thick steel plate.Hydrogen in atmosphere content be 4% ~ 75% when, meet naked light be quick-fried
It is fried, so taking the hydrogen content in carving detection air in industries such as mining, coal minings.
Conventional inductive reactance is mainly prepared by metal-oxide semiconductor (MOS) at present, such as SnO2, ZnO etc., this kind of material is quick
Sensitivity is relatively low, and the response time is longer.
The content of the invention
Based on this, it is necessary to provide a kind of conveniently hydrogen alarm device.
A kind of hydrogen gas detector, it is characterised in that including hydrogen inductive reactance, fixed value resistance, control circuit, power supply electricity
Source, heating plate, siren, relay, shell and shift knob.
Further, the inductive reactance is made up of palladium-graphene-oxidized graphite composite material, the palladium-graphite
The mass ratio of alkene-oxidized graphite composite material is 1：5~30：10~100.
Further, the control circuit is used to control alarm device.
Further, the power supply be used for circuit to control provide power supply, the power supply be dc source or
One kind in AC power.
Further, the heating plate is electrothermal ceramic plate, for toasting inductive reactance, so that resistance, which is in, dries ring
Border, the temperature range of the heating plate is 60 ~ 100 degrees Celsius.
Further, the siren includes one kind in warning lamp, buzzer or its combination.
Further, the siren may be mounted on crust of the device, can also extend to crust of the device by electric wire
Optional position in addition, to monitor.
Further, the relay is used to control siren.
Further, the shift knob is used to control alarm device.
The material of the inductive reactance is palladium-graphene-oxidized graphite composite material, the palladium-graphene-graphite oxide
The mass ratio of composite is 1：5~30：10~100.Conductance can be caused by containing in above-mentioned inductive reactance after palladium, and palladium adsorbed hydrogen
The change of rate, so as to which inductive reactance is applied in sensor to detect the concentration of hydrogen.
The preparation method of the inductive reactance, comprises the following steps：
Graphite oxide and palladium nitrate are added to the water, ultrasonic disperse formation suspension；
The suspension is dried at 40 DEG C ~ 60 DEG C, obtains being loaded with the graphene oxide of palladium nitrate；
In protective gas atmosphere toward reaction chamber venting 30min ~ 60min, then by the graphene oxide for being loaded with palladium nitrate
500 DEG C ~ 700 DEG C are warming up to 2 ~ 10 DEG C/s speed, and keeps 30min ~ 60min, and starts microwave irradiation simultaneously, power is
Palladium-graphene-oxidized graphite composite material is obtained after 50 ~ 200W, cooling；
By the palladium-graphene-oxidized graphite composite material is ground, it is pressed into column or square shape, and is connected at pillar two ends
Wire, that is, obtain the inductive reactance, the mass ratio of the palladium-graphene-oxidized graphite composite material is 1：5~30：10~
100。
In one of the embodiments, the mass ratio of the graphite oxide and palladium nitrate is 15 ~ 50:1.
In one of the embodiments, the solid-to-liquid ratio of the graphite oxide and water is 1 ~ 5g：1L.
It can cause conductance after containing palladium-graphene-oxidized graphite composite material, and palladium adsorbed hydrogen in above-mentioned inductive reactance
The change of rate, so as to which inductive reactance is applied in sensor to detect the concentration of hydrogen；Because graphene is lamella knot
Structure, palladium is uniformly dispersed between graphene and the lamella of graphite oxide, so that the sensitivity of inductive reactance is higher；
The beneficial effects of the invention are as follows：Apparatus structure is simple, and raw material and production cost are low, and siren is controlled by relay not
Safety problem can be triggered, can be used under hydrogen environment.
Brief description of the drawings
Fig. 1 is the alarm device schematic diagram of an embodiment.
Fig. 2 is the electric operation control circuit figure in an embodiment.
Embodiment
In order to facilitate the understanding of the purposes, features and advantages of the present invention, below in conjunction with the accompanying drawings to the present invention
Embodiment be described in detail.Many details are elaborated in the following description to fully understand this hair
It is bright.But the invention can be embodied in many other ways as described herein, those skilled in the art can be not
Similar improvement is done in the case of running counter to intension of the present invention, therefore the present invention is not limited to the specific embodiments disclosed below.
A kind of hydrogen gas detector, it is characterised in that including hydrogen inductive reactance, fixed value resistance, control circuit, power supply electricity
Source, heating plate, siren, relay, shell and shift knob.As shown in figure 1, the shell 100 is provided with air-vent 110, institute
Switch key 300 is stated installed in shell side, the siren 200 is extracted by electric wire, do not resided on shell, the control
Circuit arrangement processed is inside the housing.Control circuit wiring structure schematic diagram is illustrated in figure 2, wherein R1, R2, R3, R4, R5 is fixed
It is worth resistance, RH2For hydrogen inductive reactance, H is electric hot plate, and L is warning lamp, and KA is electromagnetic relay, and E is power supply, and K is to open
Close.Electromagnetic relay is connected with warning lamp, for controlling warning lamp, when inductive reactance adsorbed hydrogen causes resistance to change, so that
Make bridge circuit disequilibrium, when voltage reaches relay working voltage, relay and warning lamp branch road are connected, so as to send
Alarm.
Further, the inductive reactance is made up of palladium-graphene-oxidized graphite composite material, the palladium-graphite
The mass ratio of alkene-oxidized graphite composite material is 1：5~30：10~100.
Further, the control circuit is used to control detection means.
Further, the power supply be used for circuit to control provide power supply, the power supply be dc source or
One kind in AC power.
Further, the heating plate is electrothermal ceramic plate, below inductive reactance, for toasting inductive reactance,
So that resistance is in dry environment, the temperature range of the heating plate is 60 ~ 100 degrees Celsius.
Further, the siren includes one kind in warning lamp, buzzer or its combination.
Further, the siren may be mounted on crust of the device, can also extend to crust of the device by electric wire
Optional position in addition, to monitor.
Further, the relay is used to control siren.
Further, the shift knob is used to control detection means.
The material of the inductive reactance is palladium-graphene-oxidized graphite composite material, the palladium-graphene-graphite oxide
The mass ratio of composite is 1：5~30：10~100.Conductance can be caused by containing in above-mentioned inductive reactance after palladium, and palladium adsorbed hydrogen
The change of rate, so as to which inductive reactance is applied in sensor to detect the concentration of hydrogen.
The preparation method of the inductive reactance, comprises the following steps：
Graphite oxide and palladium nitrate are added to the water, ultrasonic disperse formation suspension；
The suspension is dried at 40 DEG C ~ 60 DEG C, obtains being loaded with the graphene oxide of palladium nitrate；
In protective gas atmosphere toward reaction chamber venting 30min ~ 60min, then by the graphene oxide for being loaded with palladium nitrate
500 DEG C ~ 700 DEG C are warming up to 2 ~ 10 DEG C/s speed, and keeps 30min ~ 60min, and starts microwave irradiation simultaneously, power is
Palladium-graphene-oxidized graphite composite material is obtained after 50 ~ 200W, cooling；
By the palladium-graphene-oxidized graphite composite material is ground, it is pressed into column or square shape, and is connected at pillar two ends
Wire, that is, obtain the inductive reactance, the mass ratio of the palladium-graphene-oxidized graphite composite material is 1：5~30：10~
100。
In one of the embodiments, the mass ratio of the graphite oxide and palladium nitrate is 15 ~ 50:1.
In one of the embodiments, the solid-to-liquid ratio of the graphite oxide and water is 1 ~ 5g：1L.
Further illustrated below in conjunction with specific embodiment.
Embodiment 1
A kind of hydrogen gas detector, it is characterised in that including hydrogen inductive reactance, fixed value resistance, control circuit, power supply, plus
Hot plate, siren, relay, shell and shift knob.As shown in figure 1, the shell 100 is provided with air-vent 110, the switch
Button 300 is arranged on shell side, and the siren 200 is extracted by electric wire, do not resided on shell, the control circuit
Arrangement is inside the housing.Control circuit wiring structure schematic diagram is illustrated in figure 2, wherein R1, R2, R3, R4, R5 is definite value electricity
Resistance, RH2For hydrogen inductive reactance, H is electric hot plate, and L is warning lamp, and KA is electromagnetic relay, and E is power supply, and K is switch.
Electromagnetic relay is connected with warning lamp, for controlling warning lamp, when inductive reactance adsorbed hydrogen causes resistance to change, so that electric
Bridge circuit disequilibrium, when voltage reaches relay working voltage, connects relay and warning lamp branch road, so as to send police
Report.
The inductive reactance is made up of palladium-graphene-oxidized graphite composite material, the palladium-graphene-graphite oxide
The mass ratio of composite is 1：10：70.
The control circuit is used to control alarm device.
The power supply is used to provide power supply to control circuit, and the power supply is 22V AC powers.
The heating plate is electrothermal ceramic plate, below inductive reactance, for toasting inductive reactance, so that at resistance
In dry environment, the temperature range of the heating plate is 80 degrees Celsius.
The siren includes warning lamp, and the optional position extended to by electric wire beyond crust of the device, to monitor.
The relay is used to control siren.
The shift knob is used to control detection means.
The preparation method of the inductive reactance, comprises the following steps：
Graphite oxide and palladium nitrate are added to the water, ultrasonic disperse formation suspension；
The suspension is dried at 60 DEG C, obtains being loaded with the graphene oxide of palladium nitrate；
In protective gas atmosphere toward reaction chamber venting 40min, then by the graphene oxide for being loaded with palladium nitrate with 5 DEG C/s
Speed be warming up to 550 DEG C, and start microwave irradiation simultaneously, power is 80W, and keeps obtaining palladium-graphite after 50min, cooling
Alkene-oxidized graphite composite material；
By the palladium-graphene-oxidized graphite composite material is ground, be pressed into column, and wire is connected at pillar two ends, i.e.,
The inductive reactance is obtained, the mass ratio of the palladium-graphene-oxidized graphite composite material is 1：10：70.
The mass ratio of the graphite oxide and palladium nitrate is 40:1.
The solid-to-liquid ratio of the graphite oxide and water is 2g：1L.
Obtained inductive reactance in this approach, after tested, its resistance are 18.283K Ω, when adsorbing 4% hydrogen, its resistance
For 83.711 K Ω, therefore R1=R2=R3=R is setH2=18.283K Ω, now bridge circuit is in poised state, electromagnetic relay
KA does not work, the non-signal an alert of warning lamp.When environment density of hydrogen rises to 4%, the resistance of inductive reactance rises to
83.711 K Ω, bridge circuit disequilibrium, now electromagnetic relay connection, while warning lamp is bright, signal an alert is informed
Environment density of hydrogen reaches 4%.
Embodiment described above only expresses the several embodiments of the present invention, and it describes more specific and detailed, but simultaneously
Therefore the limitation to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention
Protect scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of hydrogen alarm device, it is characterised in that including hydrogen inductive reactance, fixed value resistance, control circuit, power supply,
Heating plate, siren, relay, shell and shift knob.
2. a kind of hydrogen alarm device according to claim 1, the inductive reactance is by palladium-graphene-graphite oxide
Composite is made, and the mass ratio of the palladium-graphene-oxidized graphite composite material is 1：5~30：10~100.
3. a kind of hydrogen alarm device according to claim 1, the control circuit is used to control alarm device.
4. a kind of hydrogen alarm device according to claim 1, the power supply is used to provide power supply to control circuit,
The power supply is one kind in dc source or AC power.
5. a kind of hydrogen alarm device according to claim 1, the heating plate is electrothermal ceramic plate, for toasting sensing
Resistance, so that resistance is in dry environment, the temperature range of the heating plate is 60 ~ 100 degrees Celsius.
6. a kind of hydrogen alarm device according to claim 1, the siren includes one kind in warning lamp, buzzer
Or its combination.
7. a kind of hydrogen alarm device according to claim 1, the siren may be mounted on crust of the device, also may be used
With the optional position extended to by electric wire beyond crust of the device, to monitor.
8. a kind of hydrogen alarm device according to claim 1, the relay is used to control siren.
9. a kind of hydrogen alarm device according to claim 1, the shift knob is used to control alarm device.
10. a kind of preparation method of the inductive reactance of hydrogen alarm device according to claim 1 and claim 2, bag
Include following steps：
Graphite oxide and palladium nitrate are added to the water, ultrasonic disperse formation suspension；
The suspension is dried at 40 DEG C ~ 60 DEG C, obtains being loaded with the graphene oxide of palladium nitrate；
In protective gas atmosphere toward reaction chamber venting 30min ~ 60min, then by the graphene oxide for being loaded with palladium nitrate
500 DEG C ~ 700 DEG C are warming up to 2 ~ 10 DEG C/s speed, and keeps 30min ~ 60min, and starts microwave irradiation simultaneously, power is
Palladium-graphene-oxidized graphite composite material is obtained after 50 ~ 200W, cooling；
By the palladium-graphene-oxidized graphite composite material is ground, it is pressed into column or square shape, and is connected at pillar two ends
Wire, that is, obtain the inductive reactance, the mass ratio of the palladium-graphene-oxidized graphite composite material is 1：5~30：10~
100, the mass ratio of the graphite oxide and palladium nitrate is 15 ~ 50:1；The solid-to-liquid ratio of the graphite oxide and water is 1 ~ 5g：1L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710672469.3A CN107301758A (en) | 2017-08-08 | 2017-08-08 | A kind of hydrogen prior-warning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710672469.3A CN107301758A (en) | 2017-08-08 | 2017-08-08 | A kind of hydrogen prior-warning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107301758A true CN107301758A (en) | 2017-10-27 |
Family
ID=60133681
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710672469.3A Withdrawn CN107301758A (en) | 2017-08-08 | 2017-08-08 | A kind of hydrogen prior-warning device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109061304A (en) * | 2018-07-09 | 2018-12-21 | 兰州空间技术物理研究所 | A kind of palladium conductivity variations amount calculation method in extremely thin hydrogen environment |
-
2017
- 2017-08-08 CN CN201710672469.3A patent/CN107301758A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109061304A (en) * | 2018-07-09 | 2018-12-21 | 兰州空间技术物理研究所 | A kind of palladium conductivity variations amount calculation method in extremely thin hydrogen environment |
| CN109061304B (en) * | 2018-07-09 | 2020-08-18 | 兰州空间技术物理研究所 | Method for calculating conductivity variation of palladium in extremely dilute hydrogen environment |
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| PB01 | Publication | ||
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Application publication date: 20171027 |