CN2752745Y - Smoke gas sampling dilution probe - Google Patents
Smoke gas sampling dilution probe Download PDFInfo
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- CN2752745Y CN2752745Y CN 200420117187 CN200420117187U CN2752745Y CN 2752745 Y CN2752745 Y CN 2752745Y CN 200420117187 CN200420117187 CN 200420117187 CN 200420117187 U CN200420117187 U CN 200420117187U CN 2752745 Y CN2752745 Y CN 2752745Y
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Abstract
The utility model relates to a smoke gas sampling dilution probe. The utility model is characterized in that a pneumatic flow injecting device, a negative pressure shell and a heating filtering device of the utility model are three independent members and are tightly fixed with each other; the pneumatic flow injecting device is provided with a flow injecting seat, a gas seat which is arranged in the flow injecting seat and a nozzle, wherein the gas seat is provided with a step through hole which is provided with a negative pressure hole and a vertical axle hole, and an injecting nozzle of the nozzle extends in the negative pressure hole and is corresponding to the vertical axle hole; the negative pressure shell which is provided with a negative pressure cavity and the flow injecting seat of the pneumatic flow injecting device are fastened into an integral body, and the negative pressure cavity which is communicated with the vertical axle hole of the gas seat is communicated with the heating filtering device via a critical sound velocity hole; the heating filtering device is provided with a gas filtering shell, a bush, an electric heating plate, a fine filter plate, a caulking ring, a coarse filter plate and a press cover, wherein the fine filter plate, the caulking ring, the coarse filter plate and the press cover are arranged in the gas filter shell and are orderly overlapped, the negative pressure shell, the bush and the gas filter shell are orderly fastened together, the upper part and the lower part are respectively provided with a secondary chamber and a primary chamber, and a sampling pipe is arranged in a through hole of the press cover. The utility model has the advantages of difficult broken, convenient maintenance and disassembly and low cost.
Description
Affiliated technical field
The utility model relates to a kind of flue gas sampling dilution probe.
Background technology
Now in order to analyze the component content of contained harmful gas in the flue discharged flue gas, the flue gas sampling probe that is adopted generally is directly flue gas to be extracted out, after filtration, after the dehydration, dehumidifying, deliver to gas rigorous analysis instrument and carry out assay.Because gas rigorous analysis instrument requires tested gas pure, dry, otherwise, will have a strong impact on the serviceable life of measuring accuracy and dependability and instrument.Therefore, the gas of extracting out in the flue must strictly heat up, and prevents to condense, and installs dedusting more after filtration, is delivered to the cooling device cooled dehydrated, through dehumidifying, just can carry out gas analysis again.These treating apparatus complex structures, the processing cost height, and, be easy to generate shutoff because of analyzed gas concentration height, maintenance period is short.Developed the flue gas sampling dilution probe that a kind of pneumatic jet device and heating and filtering device are one abroad for this reason, this flue gas sampling dilution probe is a glass sampling dilution probe, with flue gas dilution, damage easily in the use, can not dismantle, consumable accessory can not be changed, and maintenance is inconvenient, the cost height is difficult to promote.
Summary of the invention
In order to overcome the above-mentioned deficiency of existing flue gas sampling dilution probe, the utility model provides a kind of flue gas sampling dilution probe reliable, easy to maintenance simple in structure, solid.
The technical solution of the utility model is to utilize the existing air compression station of general enterprise such as smelter, generating plant, the existing air compression station of cokery, the drying compression pure air that is produced, the air of promptly free from foreign meter, dew point-30 ℃, by the pneumatic jet device produce at its two ends, critical sound velocity hole greater than 53% vacuum tightness, and then a small amount of flue gas of continuous drawing behind two-stage filtration, mixed diluting by a certain percentage, the sample pneumatic transmission after the dilution is gone into gas rigorous analysis instrument and is analyzed.
The utility model mainly is made up of three parts, top is the pneumatic jet device, the middle part has the negative pressure shell of negative pressure cavity in being, the bottom is the heating and filtering device, will compress pure air and feed jet joint, and by the ejection of the jet blower on nozzle supersonic jet, because gas has certain viscosity, according to fluid mechanics principle, high-speed jet siphons away the gas in the negative pressure cavity, makes and forms very high vacuum tightness in the negative pressure cavity.Draw diluted flue gas in the negative pressure cavity, through gas seat ejection sample gas and be delivered to gas rigorous analysis instrument by the interface of jet seat and analyze.
This flue gas sampling dilution probe comprises the pneumatic jet device, three parts of negative pressure shell and heating and filtering device, it is characterized in that: its three parts are three independently parts and tightening together, the pneumatic jet utensil has the jet seat, the gas seat, nozzle, the jet seat has an axial step through hole, one end of the vent port of axial step through hole is an exhaust nozzle, bigger is mounting hole, the gas seat also has an axial step through hole, what this ladder hole was bigger is negative pressure hole, the vertical axis hole that communicates with negative pressure hole is arranged at the gas seat, the mounting hole air nozzle than aperture interior and the gas seat that the gas seat is installed in the jet seat reaches in the vent port, nozzle also has an axially extending bore, one end of this axially extending bore is a jet blower, the end that nozzle is laminated on gas seat negative pressure hole also is installed in the mounting hole of jet seat, the jet blower of nozzle reaches in the negative pressure hole of gas seat, and the front end of jet blower is corresponding with vertical axis hole, and the other end of nozzle is jet joint.Seal between the mounting hole of the gas seat outside and jet seat, seal between the outside of nozzle and jet seat mounting hole and the gas seat.
Between pneumatic jet device and heating and filtering device, negative pressure shell is installed and both is linked together by negative pressure shell.The jet seat of negative pressure shell and pneumatic jet device fastens as one and at both contacted positions O-ring seal is set and seals, in the negative pressure shell is negative pressure cavity, the air hole that negative pressure shell has two ends to communicate with the vertical axis hole of negative pressure cavity and gas seat, and the air hole that has two ends to communicate with negative pressure cavity and heating and filtering device, in the critical sound velocity hole of this Kong Youyi diameter 0.1-0.3mm, also a ruby seat with critical sound velocity hole can be set in this hole.
The heating and filtering device has air filter shell, lining, electric boiling plate, thin filter, spacer ring, coarse filtration plate, gland and sampling pipe, the air filter shell has up-small and down-big ladder cavity, lining is flange-like, lining has a circular cylinder and middle part that the flat board of through hole is arranged, negative pressure shell and lining fasten as one, the circular cylinder of lining from the ladder cavity of last insertion air filter shell and between O-ring seal sealing is installed, the circular cylinder that the electric boiling plate middle part has a through hole, the through hole of electric boiling plate to be enclosed within lining is filled up between the flat board and air filter shell of lining outward.Thin filter, spacer ring, coarse filtration plate and gland overlap together successively under install the ladder cavity, on thin filter, multiple filter chamber is arranged, thin filter and coarse filtration plate are separated by spacer ring, form filter chamber just between the two, the top of gland is to recessed, constitute smoke chamber with top coarse filtration plate, there is the through hole that communicates with smoke chamber from down at the middle part of gland, sampling pipe is installed in this through hole, between spacer ring and thin filter and coarse filtration plate, the O-ring seal sealing is installed, the O-ring seal sealing also is installed between gland and the coarse filtration plate.
For the ease of processing, nozzle and jet joint are two body structures, and jet joint is installed with O-ring seal by being threaded in the jet seat and being pressed in the afterbody of nozzle between jet joint and the jet seat.The connector of negative pressure cavity through having air hole is connected logical with vertical axis hole.
For the ease of total system is regularly checked, calibrated, at the first clean room of the heating and filtering device of above-mentioned flue gas sampling probe one intake channel is arranged in addition, so that enter gas or blowback air.At the spacer ring circle air hole that distributes, in the ladder cavity inboard of air filter shell one position and the corresponding ring groove of air hole are arranged, the air filter shell be installed with can only from outside enter the Non-return air valve of ring groove.The admission piece of Non-return air valve and standard gas or blowback source of the gas are connected when inspection, calibration.
Retaining valve of the present utility model can be taked following structure, at the air filter shell blind hole that communicates with ring groove is set, the tubular type valve seat is installed in blind hole, one end of valve seat has aditus laryngis, at aditus laryngis O-ring seal is being set, the valve skull is at the O-ring seal of aditus laryngis, valve stem passes aditus laryngis and reaches in the valve seat, and spring cup is installed in the valve seat and is fastened on the other end of valve stem, is overlapping spiral compression spring at valve stem, one end of this spring is pressed in the inboard of aditus laryngis, the other end withstands on spring cup, and at the spring cup axial air hole that distributes, valve gap covers outside spring cup and is fastened on the blind hole mouth, O-ring seal sealing is set between valve gap and the blind hole, valve gap have with valve seat in the admission piece that communicates.
Pneumatic jet device of the present utility model, negative pressure shell and three major parts of heating and filtering device are to be tightened together by three parts, and are solid firm, are not easy to damage, and are convenient to repair demolition, handle and change consumable accessory, and cost is low.All parts that contact with flue gas all adopt heat-resisting, corrosion resistant special stainless steel, and poly-tetrem alkene material is made.Adopt the different acoustic aperture to obtain the stable dilution ratio of different proportion, be not subjected to the influence of flue environment.High pressure gas blowback regularly guarantees that sampling conduit is unobstructed.Air path part adopts is convenient to thermostatically controlled electric boiling plate, avoids smoke condensation, and simple in structure, device is provided with complete, and both available blowback air cleaning systems inside also can feed normal concentration gas, can regularly check, calibrate system.
Description of drawings
Fig. 1 is the pneumatic jet device structural drawing of flue gas sampling dilution probe embodiment, and Fig. 2 amplifies relatively.
Fig. 2 is the structural drawing of flue gas sampling dilution probe embodiment.
Among the above-mentioned figure:
1, sample gas 2, exhaust nozzle 3, ladder hole 4, jet seat 5, exhaust nozzle 6, fillister head screw 7, O RunddichtringO 8, gas seat 9, negative pressure hole 10, jet blower 11, vertical axis hole 12, ring groove 13, O RunddichtringO 14, nozzle 15, mounting hole 16, jet joint 17, inlet suction port 18, compression pure air 19, O RunddichtringO 20, O RunddichtringO 21, air hole 22, connector 23, negative pressure shell 24, negative pressure cavity 25, O RunddichtringO 26, vacuum meter joint 27, air hole 28, air hole 29, O RunddichtringO 30, lining 31, dull and stereotyped 32, circular cylinder 33, O RunddichtringO 34, trim ring 35, trim ring groove 36, multiple filter chamber 37, ruby seat 38, critical sound velocity hole 39, O RunddichtringO 40, O RunddichtringO 41, fillister head screw 42, electric boiling plate 43, sealing gasket 44, O RunddichtringO 45, air hole 46, ring groove 47, thin filter 48, first filter chamber 49, coarse filtration plate 50, smoke chamber 51, connecting thread 52, coarse filtration plate gland 53, spiral cover 54, air hole 55, sampling pipe 56, flue gas 57, O RunddichtringO 58, O RunddichtringO 59, ladder cavity 60, spacer ring 61, air filter shell 62, air hole 63, blind hole 64, valve disc 65, aditus laryngis 66, O RunddichtringO 67, valve seat 68, valve stem 69, valve base cavity 70, spiral compression spring 71, spring cup 72, air hole 73, air admission hole 74, O RunddichtringO 75, standard gas 76, admission piece 77, air admission hole 78, valve gap
Embodiment
The embodiment of this flue gas sampling dilution probe is provided by following embodiment and accompanying drawing thereof, but this flue gas sampling dilution probe is not limited to following embodiment.
The utility model comprises pneumatic jet device and negative pressure shell and heating and filtering device, the structure of pneumatic jet device is described by Fig. 1 earlier, the pneumatic jet utensil has jet seat 4, gas seat 8, nozzle 14, jet seat 4 has an axial step through hole 3, one end of the vent port of axial step through hole 3 is an exhaust nozzle 2, bigger is mounting hole 15, gas seat 8 also has an axial step through hole, the left end of this ladder hole is an exhaust nozzle 5, what end was bigger in addition is negative pressure hole 9, at gas seat 8 hang down axle ring groove 12 and six vertical axis holes 11 are arranged, the two ends of vertical axis hole 11 communicate with negative pressure hole 9 and ring groove 12 respectively, mounting hole 15 exhaust nozzles 5 interior and gas seat 8 that gas seat 8 is installed in jet seat 4 reach in the vent port that communicates with exhaust nozzle 2, nozzle 14 also has an axially extending bore, the left end of this axially extending bore is a jet blower 10, the end that nozzle 14 is laminated on gas seat 8 negative pressure holes 9 also is installed in the mounting hole 15 of jet seat 4, the jet blower 10 of nozzle 14 reaches in the negative pressure hole 9 of gas seat 8, the front end of jet blower 13 faces vertical axis hole 11, the right-hand member of nozzle 14 is jet joint 16, the nozzle 14 and the jet joint 16 of present embodiment are two body structures, jet joint 16 is by being threaded in jet seat 4 and withstanding on the afterbody of nozzle 14, the right-hand member of jet joint 16 is an inlet suction port 17 among Fig. 1, is used for input compression pure air 18.The left end of gas seat 8 and 15 ends of mounting hole, are installed with O RunddichtringO 7, between nozzle 14 and gas seat 8 rear ends and mounting hole 15 inboards O RunddichtringO 13 are installed, and between jet joint 16 and the jet seat 4 O RunddichtringO 19 are installed.
Fig. 2 has described the structure of this flue gas sampling probe, particularly the structure of heating and filtering device.The heating and filtering device has air filter shell 61, lining 30, electric boiling plate 42, thin filter 47, spacer ring 60, coarse filtration plate 49, coarse filtration plate gland 52, spiral cover 53 and sampling pipe 55, air filter shell 61 has up-small and down-big ladder cavity 59, lining 30 is flange-like, lining 30 has a circular cylinder 32 and middle part that the flat board 31 of through hole is arranged, the circular cylinder 32 of lining 30 from the ladder cavity 59 of last insertion air filter shell 61 and between O RunddichtringO 33 sealing is installed, there is a through hole at electric boiling plate 42 middle parts, and the through hole of electric boiling plate 42 is enclosed within the circular cylinder 32 outer pads of lining 30 between flat board 31 and air filter shell 61.Lining 30 and electric boiling plate 42 are tightened together by fillister head screw 41 and air filter shell 61.Thin filter 47, spacer ring 60, coarse filtration plate 49, coarse filtration plate gland 52 and spiral cover 53 overlap together successively under install the ladder cavity 59.Thin filter 47 covers at ladder cavity 59 ladder platforms through sealing gasket 43, on thin filter 47, there is a cavity to become multiple filter chamber 36, thin filter 47 is separated by spacer ring 60 with coarse filtration plate 49, form filter chamber 48 just between the two, the top of coarse filtration plate gland 52 is to recessed, constitute smoke chamber 50 with top coarse filtration plate 49, there is the air hole 54 that communicates with smoke chamber 50 from down at the middle part of coarse filtration plate gland 52, and sampling pipe 55 is installed in air hole 54.Between spacer ring 60 and thin filter 47 and coarse filtration plate 49, O-ring seal such as O RunddichtringO 44 are installed, between coarse filtration plate gland 52 and the coarse filtration plate 49 O RunddichtringO 58 are installed.
Present embodiment has an intake channel in addition at the first filter chamber 48 of heating and filtering device, this intake channel mainly is at spacer ring 60 even four air holes 45 that distribute, one position and air hole 45 corresponding ring grooves 46 are arranged in ladder cavity 59 inboards of air filter shell 61, air filter shell 61 be installed with gas can only from outside enter the Non-return air valve of ring groove 46.The admission piece of Non-return air valve and standard gas or blowback source of the gas are connected when inspection, calibration.The retaining valve of present embodiment is taked following structure; At air filter shell 61 blind hole 63 that communicates with ring groove 46 is set, tubular type valve seat 67 is installed in blind hole 63, one end of valve seat 67 has aditus laryngis 65, at aditus laryngis 65 O RunddichtringO 66 is installed, valve disc 64 covers at the O of aditus laryngis 65 RunddichtringO 66, valve stem 68 passes aditus laryngis 65 and reaches valve base cavity 69, spring cup 71 is installed in valve base cavity 69 and is fastened on the upper end of valve stem 68, overlapping spiral compression spring 70 at valve stem 68, the lower end of spiral compression spring 70 is pressed in the inboard of aditus laryngis 65, the upper end withstands on spring cup 71, at spring cup 71 six the axial air holes 72 that distributing, valve gap 78 covers outside spring cup 71 and by the aperture of screw threads for fastening blind hole 63, between valve gap 78 and the blind hole 63 O RunddichtringO 74 is set, at valve gap 78 air admission hole 73 that communicates with valve base cavity 69 is arranged, valve gap 78 is an one with horizontal admission piece 76, admission piece 76 has air admission hole 77, and air admission hole 77 communicates with vertical air admission hole 73.Be embedded with the jewel aperture on ruby seat 37, the negative pressure of vacuum value in its diameter may command negative pressure cavity 24 and the blending ratio of flue gas kind carrier gas are dilution ratio, and general dilution ratio is 1: 30-1: 300.It is positive temperature coefficient (PTC) thermal resistance heating plate that present embodiment adopts the PTC electric boiling plate, guarantees that the aqueous vapor in the flue gas is noncondensing.
During sampling, because sampling pipe 55 directly inserts in the boiler flue, because of the inner chamber of negative pressure cavity 24 is in negative pressure, the flue gas in the critical sound velocity hole 38 by betrothal gifts stone seat 37 passes through coarse filtration plate 49 and the 47 two-layer filtrations of thin filter, removes grit, is sucked into negative pressure cavity 24.After entering gas seat 8 and compression pure air 18 carrier gas and mixing, composition sample gas 1 is delivered to gas rigorous analysis instrument and analyzes.
It is the blowback retaining valve that present embodiment is installed with back-blowing device, can regularly compression pure air 18 be blown into from admission piece 76, blow the valve stem 68 that spring cup 71 is connected with it, press down spiral compression spring 70, gap after blowback air moves down by spring cup 71 and valve stem 68 and valve disc 64 is blown into spacer ring 60, sees through coarse filtration plate 49 then, in the grit blowback air-returen flue in the flue gas, guarantee the airway patency of sampling pipe 55 and coarse filtration plate gland 52.Stop to feed blowback air, valve stem 68 relies on the elastic force of spiral compression spring 70 with aditus laryngis 65 sealings.Regular feeding standard gas can carry out system testing is demarcated from the admission piece 76 of blowback gas circuit.
Claims (7)
1, a kind of novel flue gas sampling dilution probe, it comprises pneumatic jet device, negative pressure shell and three parts of heating and filtering device, it is characterized in that: its three parts are three independently parts and tightening together; The pneumatic jet utensil has the jet seat, the gas seat, nozzle, the jet seat has an axial step through hole, one end of the vent port of axial step through hole is an exhaust nozzle, bigger is mounting hole, the gas seat also has an axial step through hole, what this ladder hole was bigger is negative pressure hole, at the gas seat vertical axis hole is arranged, the mounting hole air nozzle than aperture interior and the gas seat that the gas seat is installed in the jet seat reaches in the vent port, nozzle also has an axially extending bore, one end of this axially extending bore is a jet blower, the end that nozzle is laminated on gas seat negative pressure hole also is installed in the mounting hole of jet seat, the jet blower of nozzle reaches in the negative pressure hole of gas seat, and the front end of jet blower is corresponding with vertical axis hole, and the other end of nozzle is jet joint; Seal between the mounting hole of the gas seat outside and jet seat, seal between the outside of nozzle and jet seat mounting hole and the gas seat; Between pneumatic jet device and heating and filtering device, negative pressure shell is installed and both is linked together by negative pressure shell, the jet seat of negative pressure shell and pneumatic jet device tightens together and at both contacted positions O-ring seal is set and seals, in the negative pressure shell is negative pressure cavity, the air hole that negative pressure shell has two ends to communicate with the vertical axis hole of negative pressure cavity and gas seat, and the air hole that has two ends to communicate with negative pressure cavity and heating and filtering device, in the critical sound velocity hole of this Kong Youyi diameter 0.1-0.3mm; The heating and filtering device has air filter shell, lining, electric boiling plate, thin filter, spacer ring, coarse filtration plate, gland and sampling pipe, the air filter shell has up-small and down-big ladder cavity, lining is flange-like, lining has a circular cylinder and middle part that the flat board of through hole is arranged, negative pressure shell and lining fasten as one, the circular cylinder of lining from the ladder cavity of last insertion air filter shell and between O-ring seal sealing is installed, the circular cylinder that the electric boiling plate middle part has a through hole, the through hole of electric boiling plate to be enclosed within lining is filled up between the flat board and air filter shell of lining outward; Thin filter, spacer ring, coarse filtration plate and gland overlap together successively under install the ladder cavity, on thin filter, multiple filter chamber is arranged, thin filter and coarse filtration plate are separated by spacer ring, form filter chamber just between the two, the top of gland is to recessed, constitute smoke chamber with top coarse filtration plate, there is the through hole that communicates with smoke chamber from down at the middle part of gland, sampling pipe is installed in this through hole, between spacer ring and thin filter and coarse filtration plate, the O-ring seal sealing is installed, the O-ring seal sealing also is installed between gland and the coarse filtration plate.
2, flue gas sampling dilution probe according to claim 1, it is characterized in that: at the first spacer ring of the clean room air hole that distributing of heating and filtering device, in the ladder cavity inboard of air filter shell one position and the corresponding ring groove of these air holes are arranged, the air filter shell be installed with can only from outside enter the Non-return air valve of ring groove.
3, flue gas sampling dilution probe according to claim 2, it is characterized in that: said retaining valve is at the air filter shell blind hole that communicates with ring groove to be set, the tubular type valve seat is installed in blind hole, one end of valve seat has aditus laryngis, at aditus laryngis O-ring seal is being set, the valve skull is at the O-ring seal of aditus laryngis, valve stem passes aditus laryngis and reaches in the valve seat, spring cup is installed in the valve seat and is fastened on the other end of valve stem, overlapping spiral compression spring at valve stem, one end of this spring is pressed in the inboard of aditus laryngis, the other end withstands on spring cup, and at the spring cup axial air hole that distributes, valve gap covers outside spring cup and is fastened on the blind hole mouth, O-ring seal sealing is set between valve gap and the blind hole, valve gap have with valve seat in the admission piece that communicates.
4, flue gas sampling dilution probe according to claim 3 is characterized in that: said electric boiling plate is a positive temperature coefficient (PTC) thermal resistance heating plate.
5, according to claim 1,2,3 or 4 described flue gas sampling dilution probes, it is characterized in that:, the ruby seat with critical sound velocity hole is being set at negative pressure cavity and the air hole that the vertical axis hole of gas seat communicates.
6, flue gas sampling dilution probe according to claim 5 is characterized in that: nozzle and jet joint are two body structures, and jet joint is installed with O-ring seal by being threaded in the jet seat and being pressed in the afterbody of nozzle between jet joint and the jet seat; The connector of negative pressure cavity through having air hole is connected logical with vertical axis hole.
7, according to claim 1,2,3 or 4 described flue gas sampling dilution probes, it is characterized in that: nozzle and jet joint are two body structures, jet joint is installed with O-ring seal by being threaded in the jet seat and being pressed in the afterbody of nozzle between jet joint and the jet seat; The connector of negative pressure cavity through having air hole is connected logical with vertical axis hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420117187 CN2752745Y (en) | 2004-12-14 | 2004-12-14 | Smoke gas sampling dilution probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420117187 CN2752745Y (en) | 2004-12-14 | 2004-12-14 | Smoke gas sampling dilution probe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2752745Y true CN2752745Y (en) | 2006-01-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420117187 Expired - Fee Related CN2752745Y (en) | 2004-12-14 | 2004-12-14 | Smoke gas sampling dilution probe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2752745Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1924544B (en) * | 2006-09-09 | 2011-01-19 | 聚光科技(杭州)股份有限公司 | Method for gas sampling pre-treatment for gas detecting |
-
2004
- 2004-12-14 CN CN 200420117187 patent/CN2752745Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1924544B (en) * | 2006-09-09 | 2011-01-19 | 聚光科技(杭州)股份有限公司 | Method for gas sampling pre-treatment for gas detecting |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |