CN102967627B - Catalytic hydrogen sensor - Google Patents
Catalytic hydrogen sensor Download PDFInfo
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- CN102967627B CN102967627B CN201210400678.XA CN201210400678A CN102967627B CN 102967627 B CN102967627 B CN 102967627B CN 201210400678 A CN201210400678 A CN 201210400678A CN 102967627 B CN102967627 B CN 102967627B
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Abstract
The invention discloses a catalytic hydrogen sensor, belonging to the technical field of concentration measurement of flammable and explosive gas. The sensor comprises a catalytic reactor (1), a explosion protection device (2), a protective outer cylinder (3), a first heat-sensitive component (4), a first cutting sleeve (5), a second cutting sleeve (6), an upper pattern plate (7), a positioning rod (8), a mounting rod (9), a second heat-sensitive component (10), a protective filtering layer (11), a supporting plate (12) and a lower pattern plate (13). The sensor enables a catalytic combination reaction of the hydrogen and the oxygen under a normal temperature, without external power, thereby reducing energy consumption and being stabile and safe during a using process.
Description
Technical field
The present invention relates to a kind of catalysis type hydrogen sensor, belong to flammable explosive gas measurement of concetration technical field.
Background technology
Under nuclear power plant's accident conditions, can produce a large amount of hydrogen, the source of hydrogen: 1) accident is early stage, zirconium-water reaction two-forty ground produces hydrogen.2) the accident middle and later periods, irradiation decomposition, the melt and dissolved thing of reactor core and the concrete reaction of water, also can produce a large amount of hydrogen.The gathering of a large amount of hydrogen makes concentration of hydrogen in containment vessel have the possibility over blast limit 4%, has the danger of blast.For avoiding hydrogen deflagration accident having to occur, destroy containment integrity, need to build hydrogen measurement system the hydrogen state of aggregation of containment diverse location is monitored, after occurring, accident implements effectively to intervene.
Under accident conditions, reactor is emitted a large amount of heats, and in containment, the rising of temperature is accompanied by the rising of pressure.As temperature after Er Dai He Erdaijia nuclear power plant accident can reach 150 degree, pressure can reach 6bar.Gas composition in containment is to take air and water vapor as main, the High Temperature High Pressure mixed gases that contains hydrogen and other gases.
Because gas in containment under accident conditions presents high temperature, high pressure, highly radioactive feature, therefore the measurement for density of hydrogen has increased very large difficulty.
For containment density of hydrogen, common metering system is that gas is extracted out outside transmission pipeline is delivered to containment as sample gas in a small amount of containment, outside containment after gas pre-service the density of hydrogen in hydrogen gas sensor measurement gas, measuring process comprises: gas pre-service, gas concentration analysis all complete outward at containment.This mode has application precedent both at home and abroad.This mode is due to the Pipe transfer existing radgas, has response lag, has the shortcoming of potential radioactivity disclosure risk.Owing to measuring the restriction of pipeline, be generally arranged as spot measurement simultaneously.Gas changes at transmitting procedure state, and the accuracy of measurement result is affected.Due to the existence of gas pre-service and gas transfer conduit, system is more complicated, and energy consumption equipment is many, power consumption is large.
Due to the above-mentioned shortcoming of pull-out type measuring system, after particularly Fukushima, Japan nuclear accident occurs, development is directly arranged in the hydrogen gas sensor of measuring in containment and is subject to extensive concern.Directly measuring system forms simply, and this mode is that sensor is directly measured in containment, output one-shot measurement electric signal, and rapid reaction hydrogen changes, and avoids lagging behind.Only there is the transmission of electric signal in system, does not have gas to pump to outside containment, is convenient to diverse location in containment a plurality of hydrogen gas sensors composition multi-point continuous monitoring systems are installed.By transmission cable, sensor one-shot measurement signal is outputed to outside containment, outside containment, measuring-signal is become and send, process and show.Be applied at present monitoring system in the containment shell of nuclear power plant and be the WS-85 hydrogen detection system that German Siemens company adopts thermocatalysis principle.The hydrogen sensing probe that WS-85 adopts is comprised of the platinum electrode and the contrast electrode that scribble catalyzer, by the interior platinum electrode of popping one's head in is continued to energising, guarantee when touching the potpourri of hydrogen and oxygen, in platinum electrode surface, there is efficient catalytic combination reaction, reaction heat causes platinum electrode resistance variations, and increased resistance value is the characteristic signal that hydrogen exists.This signal is sent to the analysis that completes density of hydrogen on Wheatstone bridge.
The shortcoming of this system is: scribble the hydrogen sensing probe of catalyzer and the contact area of hydrogen is little, cause catalysis combined efficiency lower, for keeping higher catalysis combined efficiency, to catalysis electrode, need to continue to adopt externally fed to heat, energy consumption is large; And power supply or heating process can form igniting or the explosive source of damp when density of hydrogen is higher, use and there is unstable and insecurity.
Summary of the invention
The object of the present invention is to provide a kind of catalysis type hydrogen sensor, in described sensor, the reaction compartment of catalytic reactor is larger, the gas contact area in the catalyzer that fills and npp safety shell larger, can make hydrogen and oxygen that catalytic combination reaction occurs at normal temperatures, without externally fed, reduced energy consumption, and the burning and the blast that due to power supply or heating process, cause can avoid density of hydrogen higher time, guarantee in use stable and safety of described sensor.
Object of the present invention is realized by following technical scheme:
A catalysis type hydrogen sensor, described sensor comprises: catalytic reactor, explosion-proof apparatus, protection urceolus, the first heat-sensitive element, the first cutting ferrule, the second cutting ferrule, upper face plate, backstay, mounting rod, the second heat-sensitive element, protection filtering layer, supporting plate and lower face plate;
Wherein, catalytic reactor is the cylindrical structure of an end opening, and openend is with external thread; Explosion-proof apparatus is the cylindrical structure of an end opening, and openend is with internal thread, and opening internal diameter matches with catalytic reactor openend external diameter, and cylinder internal diameter is greater than the external diameter of catalytic reactor; Protection filtering layer is the cylindrical structure of an end opening, openend internal diameter matches with explosion-proof apparatus openend external diameter, protection filtering layer sidewall has the double-decker in space for the centre that consists of internal layer sidewall and outer sidewall, and the internal diameter of internal layer sidewall is greater than the external diameter of explosion-proof apparatus; Supporting plate is circular slab, and diameter is greater than the external diameter of the outer sidewall of protection filtering layer; The cylindrical structure that protection urceolus is both ends open; The diameter of upper face plate is identical with the external diameter of protection urceolus, and the diameter of lower face plate is identical with the internal diameter of protection urceolus, has equally distributed through hole on upper face plate and lower face plate, for gas, spreads;
In described sensor, the annexation of each assembly is as follows:
Upper face plate is positioned at protection urceolus top, and upper face plate bottom surface is connected with protection urceolus barrel top, and lower face plate is positioned at protection urceolus bottom inside, and fixedly connected to the inner side with protection urceolus barrel;
Catalytic reactor packs explosion-proof apparatus inside into, and all upward and be threaded connection, gap is left with explosion-proof apparatus bottom in catalytic reactor bottom for catalytic reactor openend and explosion-proof apparatus openend; Protection filtering layer is sleeved on explosion-proof apparatus outside, and openend upward, protection filtering layer top and antiriot device top are connected, protection filtering layer bottom is positioned at below, explosion-proof apparatus bottom, and be connected with explosion-proof apparatus bottom, between protection filtering layer internal layer sidewall and the sidewall of explosion-proof apparatus, leave space; Catalytic reactor, explosion-proof apparatus, protection filtering layer form hydrogen sensing assembly; Supporting plate is positioned at hydrogen sensing assembly below, is connected with protection filtering layer bottom; Hydrogen sensing assembly is fixed in protection urceolus by mounting rod, and mounting rod has 3, and its top and upper face plate are connected, and bottom and supporting plate are connected, and 3 mounting rods are uniformly distributed in the outside of hydrogen sensing assembly;
The first heat-sensitive element stretches in protection urceolus through upper face plate, between bottom and protection urceolus bottom, leaves space, and it is outside that upper end is positioned at protection urceolus, and be connected by the first cutting ferrule and upper face plate;
Backstay upper end and upper face plate are connected, lower end is relative with catalytic reactor open centre, the second heat-sensitive element stretches in protection urceolus through upper face plate, and locate by backstay, lower end is stretched in catalytic reactor, and and catalytic reactor bottom between leave space, it is outside that upper end is positioned at protection urceolus, and be connected by the second cutting ferrule and upper face plate;
Described sensor also can comprise 3 hanging supports, 3 vertical welding supports and anti-pouring cover, wherein, 3 hanging support one end are connected with protection urceolus respectively, and the other end supports and is connected with vertical welding respectively, form 3 groups of supporting constructions, be uniformly distributed in the outside of described protection urceolus; Anti-pouring cover diameter is greater than upper face plate diameter, and is connected with protection urceolus.
Catalytic reactor external diameter is 10～50mm, and thickness is 0.5～2mm, is highly 40～90mm; Catalytic reactor opening internal diameter is 1～8mm;
Explosion-proof apparatus external diameter is 15～60mm, and thickness is 0.5～2mm, is highly 50～100mm;
Protection filtering layer height is 80～120mm, and outer sidewall external diameter is 60～100mm, and the gross thickness of outer sidewall, internal layer sidewall and outer sidewall and internal layer sidewall intermediate gaps is 5～20mm, and outer sidewall and internal layer sidewall intermediate gaps are 3～8mm;
Protection urceolus external diameter is 160～200mm, and thickness is 2～5mm; Be highly 300～500mm;
Upper face plate diameter is 160～200mm, and thickness is 3～6mm, and wherein equally distributed through-hole diameter is 4～8mm;
Lower face plate diameter is 160～190mm, and thickness is 2～5mm, and wherein equally distributed through-hole diameter is 4～8mm;
The first heat-sensitive element is occasionally platinum resistance class temperature element of thermoelectricity, and its diameter is 2～6mm, and the degree of depth stretching in protection urceolus is 260～320mm;
The second sensitive element is occasionally platinum resistance class temperature element of thermoelectricity, and its diameter is 2～6mm, and the degree of depth stretching in protection urceolus is 160～200mm;
Backstay external diameter is 6～8mm, and thickness is 1～2mm, and length is 110～130mm;
Mounting rod diameter is 4～8mm, and length is 250～280mm;
Supporting plate diameter is 100～150mm, and thickness is 3～8mm;
Catalyzer is housed, the catalyzer of described catalyzer for making hydrogen and oxygen react at normal temperatures in catalytic reactor; Between protection filtering layer internal layer sidewall and outer sidewall, filler is housed, described filler is spherical Al
2o
3, spherical SiO
2or spherical Al
2o
3with spherical SiO
2potpourri;
In described sensor, except the first heat-sensitive element and the second heat-sensitive element, the material of all parts is stainless steel, and wherein, catalytic reactor and explosion-proof apparatus adopt stainless steel cloth, and protection filtering layer adopts 30～100 object stainless steel cloths; The first heat-sensitive element and the second heat-sensitive element adopt stainless steel casing.
Principle of work
When the explosive mixed gas that contains hydrogen occurs, catalytic reactor starts to start operation, hydrogen and oxygen generation combination reaction, emit heat, catalytic reactor temperature is raise, and at this moment the second heat-sensitive element can be measured the temperature of catalytic reactor, and the first heat-sensitive element is for measuring the environment temperature in npp safety shell, by the difference between these two temperature, obtain the temperature rise value of catalytic reaction, further can calculate the volumetric concentration of hydrogen.
Beneficial effect
(1) in sensor of the present invention, be provided with the catalytic reactor that catalyzer is housed, the probe size of the existing hydrogen gas sensor of volume ratio of catalytic reactor is large, the contact area of the catalyzer that fills and hydrogen also larger, can fully contact with the gas in npp safety shell, and under normal temperature condition, just can there is catalytic combination reaction and can realize normal temperature and start, without externally fed, reduced energy consumption, in the time of can avoiding like this density of hydrogen higher, due to burning and the blast of powering or heating process causes, guarantee in use stable and safety of described sensor.
(2) in sensor of the present invention, explosion-proof apparatus is positioned at the inside of protection filtering layer; can reduce the reaction heat of catalytic reactor; make environment temperature and catalytic reaction temperature sum be less than 600 ℃; working control is upper and lower at 550 ℃; away from 600 ℃ of the igniting blast temperatures of hydrogen; can guarantee in use procedure not can be to high concentration hydrogen igniting around, explosion caused, safe.
(3) protection filtering layer of the present invention has protective action to the pollutant of gasoloid and so on, and gas disperse state is had to protective effect, gas flowfield is changed catalytic reactor is not exerted an influence.
(4) upper face plate of the present invention and lower face plate all have through hole, and this makes to protect urceolus and lower face plate, upper face plate are combined formation nature diffusional environment, and protection hydrogen sensing assembly is not subject to the impact of gas flow field change.
(5) in sensor of the present invention except the first heat-sensitive element and the second heat-sensitive element, all parts all adopt stainless steel material, the first heat-sensitive element and the second heat-sensitive element adopt stainless steel casing, sensor does not in use form igniting or the explosive source of inflammable or explosion hazard gaseous mixture, and security is good.
(6) sensor of the present invention can be arranged in npp safety shell, can measure rapidly and accurately the concentration of hydrogen, density of hydrogen is monitored in real time, so that density of hydrogen is taked effective safeguard procedures when too high in time, and can be met the demand of multimetering.
(7) in sensor of the present invention, the size of each assembly is all adjustable, makes the range of sensor adjustable, thereby can adapt to the measurement of different hydrogen concentration.
(8) because nuclear power plant has spray system under accident conditions, the anti-pouring cover in sensor of the present invention can make sensor avoid being sprayed, and can guarantee that the normal measurement of sensor is used.
Accompanying drawing explanation
Fig. 1 is the sectional view of sensor of the present invention;
Fig. 2 is the vertical view of lower face plate in sensor of the present invention;
Wherein, 1-catalytic reactor, 2-explosion-proof apparatus, 3-protection urceolus, 4-the first heat-sensitive element, 5-the first cutting ferrule, 6-the second cutting ferrule, 7-upper face plate, 8-backstay, 9-mounting rod, 10-the second heat-sensitive element, 11-protection filtering layer, 12-supporting plate, 13-lower face plate, the anti-pouring cover of 14-, 15-hanging support, the vertical welding of 16-are supported.
Embodiment
Below in conjunction with the drawings and specific embodiments in detail the present invention is described in detail, but is not limited to this.
Embodiment 1
As shown in Figure 1, a catalysis type hydrogen sensor, described sensor comprises: catalytic reactor 1, explosion-proof apparatus 2, protection urceolus 3, the first heat-sensitive element 4, the first cutting ferrule 5, the second cutting ferrule 6, upper face plate 7, backstay 8, mounting rod 9, the second heat-sensitive element 10, protection filtering layer 11, supporting plate 12 and lower face plate 13;
Wherein, catalytic reactor 1 is the cylindrical structure of an end opening, and openend is with external thread; Explosion-proof apparatus 2 is the cylindrical structure of an end opening, and openend is with internal thread, and opening internal diameter matches with catalytic reactor 1 openend external diameter, and cylinder internal diameter is greater than the external diameter of catalytic reactor 1; Protection filtering layer 11 is the cylindrical structure of an end opening, openend internal diameter matches with explosion-proof apparatus 2 openend external diameters, protection filtering layer 11 sidewalls have the double-decker in space for the centre that consists of internal layer sidewall and outer sidewall, and the internal diameter of internal layer sidewall is greater than the external diameter of explosion-proof apparatus 2; Supporting plate 12 is circular slab, and diameter is greater than the external diameter of protection filtering layer 11 outer sidewalls; The cylindrical structure that protection urceolus 3 is both ends open; The diameter of upper face plate 7 is identical with the external diameter of protection urceolus 3, and the diameter of lower face plate 13 is identical with the internal diameter of protection urceolus 3, on upper face plate 7 and lower face plate 13, has equally distributed through hole, for gas diffusion, as shown in Figure 2;
In described sensor, the annexation of each assembly is as follows:
Upper face plate 7 is positioned at protection urceolus 3 tops, and upper face plate 7 bottom surfaces weld together with protection urceolus 3 barrel tops, and lower face plate 13 is positioned at protection urceolus 3 bottom inside, and welds together with protection urceolus 3 barrel inner sides;
Catalytic reactor 1 packs explosion-proof apparatus 2 inside into, and all upward and be threaded connection, gap is left in catalytic reactor 1 bottom and explosion-proof apparatus 2 bottoms for catalytic reactor 1 openend and explosion-proof apparatus 2 openends; Protection filtering layer 11 is sleeved on explosion-proof apparatus 2 outsides, and openend upward, protection filtering layer 11 tops are together with antiriot device welded top, protection filtering layer 11 bottoms are positioned at explosion-proof apparatus 2 belows, bottom, and together with explosion-proof apparatus 2 bottom weldings, between protection filtering layer 11 internal layer sidewalls and the sidewall of explosion-proof apparatus 2, leave space; Catalytic reactor 1, explosion-proof apparatus 2, protection filtering layer 11 form hydrogen sensing assembly; Supporting plate 12 is positioned at hydrogen sensing assembly below, together with being bolted on protection filtering layer 11 bottoms; Hydrogen sensing assembly is fixed in protection urceolus 3 by mounting rod 9, and mounting rod 9 has 3, and its top and upper face plate 7 weld together, and together with bottom is bolted on supporting plate 12,3 mounting rods 9 are uniformly distributed in the outside of hydrogen sensing assembly;
The first heat-sensitive element 4 stretches in protection urceolus 3 through upper face plate 7, between bottom and protection urceolus 3 bottoms, leaves space, and upper end is positioned at protection urceolus 3 outsides, and is connected with upper face plate 7 by the first cutting ferrule 5;
Backstay 8 upper ends and upper face plate 7 weld together, lower end is relative with catalytic reactor 1 open centre, the second heat-sensitive element 10 stretches in protection urceolus 3 through upper face plate 7, and locate by backstay 8, lower end is stretched in catalytic reactor 1, and and catalytic reactor 1 bottom between leave space, upper end is positioned at protection urceolus 3 outsides, and is connected by the second cutting ferrule 6 and upper face plate 7;
Described sensor also can comprise 15,3 vertical welding supports 16 of 3 hanging supports and anti-pouring cover 14, wherein, 3 hanging support 15 one end weld together with protection urceolus 3 respectively, together with the other end is bolted with vertical welding support 16 respectively, form 3 groups of supporting constructions, be uniformly distributed in the outside of described protection urceolus 3; Anti-pouring is covered 14 diameters and is greater than upper face plate 7 diameters, and welds together with protection urceolus 3.
Catalytic reactor 1 external diameter is 10～50mm, and thickness is 0.5～2mm, is highly 40～90mm; Catalytic reactor 1 opening internal diameter is 1～8mm;
Explosion-proof apparatus 2 external diameters are 15～60mm, and thickness is 0.5～2mm, are highly 50～100mm;
Protection filtering layer 11 is highly 80～120mm, and outer sidewall external diameter is 60～100mm, and the gross thickness of outer sidewall, internal layer sidewall and outer sidewall and internal layer sidewall intermediate gaps is 5～20mm, and outer sidewall and internal layer sidewall intermediate gaps are 3～8mm;
Protection urceolus 3 external diameters are 160～200mm, and thickness is 2～5mm; Be highly 300～500mm;
Upper face plate 7 diameters are 160～200mm, and thickness is 3～6mm, and wherein equally distributed through-hole diameter is 4～8mm;
Lower face plate 13 diameters are 160～190mm, and thickness is 2～5mm, and wherein equally distributed through-hole diameter is 4～8mm;
The first heat-sensitive element 4 is occasionally platinum resistance class temperature element of thermoelectricity, and its diameter is 2～6mm, and the degree of depth stretching in protection urceolus 3 is 260～320mm, for measuring the environment temperature in npp safety shell;
The second sensitive element is occasionally platinum resistance class temperature element of thermoelectricity, and its diameter is 2～6mm, and the degree of depth stretching in protection urceolus 3 is 160～200mm, for measuring the temperature of oxyhydroxide reaction;
Backstay 8 external diameters are 6～8mm, and thickness is 1～2mm, and length is 110～130mm;
Mounting rod 9 diameters are 4～8mm, and length is 250～280mm;
Supporting plate 12 diameters are 100～150mm, and thickness is 3～8mm;
The catalyzer that can make hydrogen and oxygen react is at normal temperatures housed in catalytic reactor 1; For example: described catalyzer is the first catalyzer or the second catalyzer, and wherein, the first catalyzer is with Al
2o
3as carrier, Co, Au, Pt are active component, and the quality percentage composition that the gross mass of catalyzer of take is 100%, Co, Au, Pt is respectively 6.4%, 0.45%, 0.35%; The second catalyzer is with Al
2o
3as carrier, Pt, Pd, Rh are active component, and the mass percentage content that the gross mass of catalyzer of take is 100%, Pt, Pd, Rh is respectively 0.3%, 0.7%, 0.3%; Between protection filtering layer 11 internal layer sidewalls and outer sidewall, filler is housed, described filler is spherical Al
2o
3, spherical SiO
2or spherical Al
2o
3with spherical SiO
2potpourri, described protection filtering layer has protective action to the pollutant of gasoloid and so on, and gas disperse state is had to protective effect, gas flowfield is changed catalytic reactor is not exerted an influence.
In described sensor, except the first heat-sensitive element 4 and the second heat-sensitive element 10, the material of all parts is stainless steel, and wherein, catalytic reactor 1 and explosion-proof apparatus 2 adopt stainless steel cloth, and protection filtering layer 11 adopts 30～100 object stainless steel cloths; The first heat-sensitive element 4 and the second heat-sensitive element 10 adopt stainless steel casing.
The present invention includes but be not limited to above embodiment, every any being equal to of carrying out under the principle of spirit of the present invention, replaces or local improvement, all will be considered as within protection scope of the present invention.
Claims (10)
1. a catalysis type hydrogen sensor, is characterized in that: described sensor comprises: catalytic reactor (1), explosion-proof apparatus (2), protection urceolus (3), the first heat-sensitive element (4), the first cutting ferrule (5), the second cutting ferrule (6), upper face plate (7), backstay (8), mounting rod (9), the second heat-sensitive element (10), protection filtering layer (11), supporting plate (12) and lower face plate (13);
Wherein, catalytic reactor (1) is the cylindrical structure of an end opening, and openend is with external thread; Explosion-proof apparatus (2) is the cylindrical structure of an end opening, and openend is with internal thread, and opening internal diameter matches with catalytic reactor (1) openend external diameter, and cylinder internal diameter is greater than the external diameter of catalytic reactor (1); Protection filtering layer (11) is the cylindrical structure of an end opening, openend internal diameter matches with explosion-proof apparatus (2) openend external diameter, protection filtering layer (11) sidewall has the double-decker in space for the centre that consists of internal layer sidewall and outer sidewall, and the internal diameter of internal layer sidewall is greater than the external diameter of explosion-proof apparatus (2); Supporting plate (12) is circular slab, and diameter is greater than the external diameter of the outer sidewall of protection filtering layer (11); The cylindrical structure that protection urceolus (3) is both ends open; The diameter of upper face plate (7) is identical with the external diameter of protection urceolus (3), and the diameter of lower face plate (13) is identical with the internal diameter of protection urceolus (3), on upper face plate (7) and lower face plate (13), has equally distributed through hole;
In described sensor, the annexation of each assembly is as follows:
Upper face plate (7) is positioned at protection urceolus (3) top, upper face plate (7) bottom surface is connected with protection urceolus (3) barrel top, lower face plate (13) is positioned at protection urceolus (3) bottom inside, and fixedly connected to the inner side with protection urceolus (3) barrel;
Catalytic reactor (1) packs explosion-proof apparatus (2) inside into, all upward and be threaded connection, gap is left with explosion-proof apparatus (2) bottom in catalytic reactor (1) bottom for catalytic reactor (1) openend and explosion-proof apparatus (2) openend; Protection filtering layer (11) is sleeved on explosion-proof apparatus (2) outside, and openend upward, protection filtering layer (11) top and explosion-proof apparatus top are connected, protection filtering layer (11) bottom is positioned at below, explosion-proof apparatus (2) bottom, and be connected with explosion-proof apparatus (2) bottom, between protection filtering layer (11) internal layer sidewall and the sidewall of explosion-proof apparatus (2), leave space; Catalytic reactor (1), explosion-proof apparatus (2), protection filtering layer (11) form hydrogen sensing assembly; Supporting plate (12) is positioned at hydrogen sensing assembly below, is connected with protection filtering layer (11) bottom; Hydrogen sensing assembly is fixed in protection urceolus (3) by mounting rod (9), mounting rod (9) has 3, its top and upper face plate (7) are connected, and bottom and supporting plate (12) are connected, and 3 mounting rods (9) are uniformly distributed in the outside of hydrogen sensing assembly;
The first heat-sensitive element (4) stretches in protection urceolus (3) through upper face plate (7), between bottom and protection urceolus (3) bottom, leave space, upper end is positioned at protection urceolus (3) outside, and is connected by the first cutting ferrule (5) and upper face plate (7);
Backstay (8) upper end and upper face plate (7) are connected, lower end is relative with catalytic reactor (1) open centre, the second heat-sensitive element (10) stretches in protection urceolus (3) through upper face plate (7), and by backstay (8) location, lower end is stretched in catalytic reactor (1), and and catalytic reactor (1) bottom between leave space, upper end is positioned at protection urceolus (3) outside, and is connected by the second cutting ferrule (6) and upper face plate (7).
2. a kind of catalysis type hydrogen sensor according to claim 1, it is characterized in that: described sensor also comprises 3 hanging supports (15), 3 vertical welding support (16) and anti-pouring covers (14), wherein, 3 hanging supports (15) one end is connected with protection urceolus (3) respectively, the other end supports (16) with vertical welding respectively and is connected, form 3 groups of supporting constructions, be uniformly distributed in the outside of described protection urceolus (3); Anti-pouring cover (14) diameter is greater than upper face plate (7) diameter, and is connected with protection urceolus (3).
3. a kind of catalysis type hydrogen sensor according to claim 1, is characterized in that: described catalytic reactor (1) external diameter is 10～50mm, and thickness is 0.5～2mm, is highly 40～90mm; Catalytic reactor (1) opening internal diameter is 1～8mm;
Explosion-proof apparatus (2) external diameter is 15～60mm, and thickness is 0.5～2mm, is highly 50～100mm;
Protection filtering layer (11) is highly 80～120mm; outer sidewall external diameter is 60～100mm; the gross thickness of outer sidewall, internal layer sidewall and outer sidewall and internal layer sidewall intermediate gaps is 5～20mm, and outer sidewall and internal layer sidewall intermediate gaps are 3～8mm.
4. a kind of catalysis type hydrogen sensor according to claim 1, is characterized in that: described protection urceolus (3) external diameter is 160～200mm, and thickness is 2～5mm; Be highly 300～500mm;
Upper face plate (7) diameter is 160～200mm, and thickness is 3～6mm, and wherein equally distributed through-hole diameter is 4～8mm;
Lower face plate (13) diameter is 160～190mm, and thickness is 2～5mm, and wherein equally distributed through-hole diameter is 4～8mm.
5. a kind of catalysis type hydrogen sensor according to claim 1, it is characterized in that: described the first heat-sensitive element (4) is occasionally platinum resistance class temperature element of thermoelectricity, its diameter is 2～6mm, and the degree of depth stretching in protection urceolus (3) is 260～320mm;
The second sensitive element is occasionally platinum resistance class temperature element of thermoelectricity, and its diameter is 2～6mm, and the degree of depth stretching in protection urceolus (3) is 160～200mm.
6. a kind of catalysis type hydrogen sensor according to claim 1, is characterized in that: described backstay (8) external diameter is 6～8mm, and thickness is 1～2mm, and length is 110～130mm.
7. a kind of catalysis type hydrogen sensor according to claim 1, is characterized in that: described mounting rod (9) diameter is 4～8mm, and length is 250～280mm.
8. a kind of catalysis type hydrogen sensor according to claim 1, is characterized in that: described supporting plate (12) diameter is 100～150mm, and thickness is 3～8mm.
9. a kind of catalysis type hydrogen sensor according to claim 1, is characterized in that: described catalytic reactor is equipped with catalyzer in (1), the catalyzer of described catalyzer for making hydrogen and oxygen react at normal temperatures; Between protection filtering layer (11) internal layer sidewall and outer sidewall, filler is housed, described filler is spherical Al
2o
3, spherical SiO
2or spherical Al
2o
3with spherical SiO
2potpourri.
10. a kind of catalysis type hydrogen sensor according to claim 1, it is characterized in that: in described sensor except the heart portion of the first heat-sensitive element (4) and the second heat-sensitive element (10), the material of all parts is stainless steel, wherein, catalytic reactor (1) and explosion-proof apparatus (2) adopt stainless steel cloth, and protection filtering layer (11) adopts 30～100 object stainless steel cloths; The first heat-sensitive element (4) and the second heat-sensitive element (10) adopt stainless steel casing.
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| CN103616408B (en) * | 2013-11-19 | 2015-10-14 | 昆明理工大学 | A kind of catalytic combustion type gas concentration meter based on optical fiber Bragg raster and using method thereof |
| CN107607589B (en) * | 2017-07-31 | 2020-05-19 | 兰州空间技术物理研究所 | Space hydrogen atom in-situ miniature detector and detection method |
| CN107561117B (en) * | 2017-08-22 | 2022-07-26 | 中国船舶重工集团公司第七一八研究所 | Hydrogen sensor based on thermal conduction principle |
| JP7129580B1 (en) * | 2022-04-11 | 2022-09-01 | 東京瓦斯株式会社 | Hydrogen gas concentration meter |
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