CN2847289Y - Intelligent early warning device for thermal desorption instrument - Google Patents
Intelligent early warning device for thermal desorption instrument Download PDFInfo
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- CN2847289Y CN2847289Y CN 200520114135 CN200520114135U CN2847289Y CN 2847289 Y CN2847289 Y CN 2847289Y CN 200520114135 CN200520114135 CN 200520114135 CN 200520114135 U CN200520114135 U CN 200520114135U CN 2847289 Y CN2847289 Y CN 2847289Y
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- warning device
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- early warning
- intelligent early
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Abstract
The utility model relates to an intelligent early warning device for a thermal desorption instrument, which is composed of a steel bottle, a manometer, a rotameter, a thermal desorption stove, an activated carbon adsorption tube which is sampled, a 100 ml syringe and an early warning device. The early warning device adopts a reflection type infrared sensor of which the infrared ejector and the infrared receiver are on the same side. When an object approaches the sensor, the infrared ray launched by the infrared ejector is reflected by the moving object, and then is received by the infrared receiver; a light signal is converted to an electrical signal through a special infrared receiving module to drive a buzzer warning. The 100 ml syringe is arranged on a bracket that is clamped on a housing socket and can not move backwards and forwards. The early warning device is also fixed on the housing of the early warning device behind the bracket of the 100 ml syringe, and a distance is kept between the syringe and the early warning device. When the volume of the gas in the syringe reaches a certain amount, the early warning device can give an audible alarm. The early warning device can raise work efficiency, ensure the quality and belongs to the preventive medicine field.
Description
Technical field
The utility model relates to a kind of thermal desorptioner, especially a kind of thermal desorptioner intelligent early-warning device.The utility model is that the intelligent early-warning device is installed on the thermal desorptioner, belongs to the preventive medicine field.
Background technology
The phase early 1980s, the many Tian Zhi of Japanese scholar at first use solid adsorbent such as acticarbon that cocoanut shell fires and silica gel and gather the airborne organic poison of operation site surrounding.In Japan, the thermal desorptioner that has directly is assemblied on the gas chromatographicanalyzer, and the solid adsorbent after the absorption organic poison is after thermal desorption, and rotating valve can directly carry out qualitative, quantitative test with the poisonous substance inject gas chromatograph.Two during the last ten years, and China is in the preventive medicine field, and the work with thermal desorptioner desorb solid adsorbent has produced huge economic benefit and social benefit to society.Instrument mainly is made up of control temperature system, heating furnace two parts.Airborne toxic gas adsorbs with solid adsorbent, for example, after activated carbon tube absorption, insertion thermal desorption stove heats frees (being thermal desorption), make stripping gas with nitrogen, with the desorption rate of poisonous substance with 30ml/min, nitrogen stream is pressed in the 100ml syringe by activated carbon tube and (makes the poisonous substance that is adsorbed in the activated carbon granule take off absorption).Then, the base of syringe from prior-warning device taken out, seal the air intake opening of glass syringe with little Capsule.After finishing these steps, just the toxic gas inject gas chromatograph in the syringe can have been analyzed.
Present thermal desorptioner by the high pressure nitrogen steel cylinder as the desorb source of the gas, heating furnace is as heating source, heating furnace needs a temperature controller, and under the situation of 300 ℃ of heating, nitrogen stream is separated do carrier gas and is drawn in 100 milliliters of (ml) syringes with the solid adsorbent activated carbon tube of gathering poisonous substance.About 3 minutes (min) is full of the 100ml syringe.
The defective of prior art is:
1, the clean level of every glass syringe, it is the difference in size (size of friction force also is quality problems sometimes) of friction force between inwall and the fuse, or because the subtle change of nitrogen steel cylinder top hole pressure, only, the gas after the desorb may be strict controlled in 100ml. by 3 minutes time control or the control of leaning on spinner-type flowmeter
2, present, the thermal desorption operation of sample needs 1 people, and the gas chromatographic analysis operation needs 1 people, also has dilution of sample in addition, and work such as preparation standard gas generally need 2-3 people.Even in a laboratory, the operative position of thermal desorptioner and chromatographic operative position often have certain distance, and both operations and monitoring can not go satisfactorily to finish under the taking into account of personnel.Operating personnel worry that the desorb volume surpasses 100ml, worry that desorption rate is too fast or slow excessively.
3, owing to be subjected to the influence of factors such as friction force between syringe shell inwall and the inner core, stripping gas (nitrogen) is difficult for being strict controlled in the flow velocity of 30ml/min, and desorption rate is variant with every syringe, but the also variation of invar bottle top hole pressure and changing sometimes.The slow phenomenon of desorption rate neglecting suddenly soon causes the desorb volume to surpass 100ml, even because carelessness, the syringe fuse is ejected the syringe outer wall by gas fully, and plunger is thrown off mutually with shell, and the gas after the desorb has all been run away, and promptly sample is lost.The desorb volume surpasses 100ml, wants correction volume during result of calculation.Sample is lost, and then belongs to operating irregularity.Every day tens samples, every desorption time that sample is about 3 minutes belongs to promptly and takes it easy, the single repetition duty that can not relax, the staff diverts one's attention on the contrary easily, energy is not concentrated.Such as: speak with other people, do a little other things, very easily cause the excessive problem of desorb volume.
The utility model content
The present utility model purpose is to overcome the deficiencies in the prior art, increases work efficiency, ensures the quality of products, and has developed thermal desorptioner intelligent early-warning device.
The utility model is made up of steel cylinder, tensimeter (generally using oxygen pressure reducer), spinner-type flowmeter, thermal desorption stove, the charcoal absorption pipe of adopting sample, 100ml syringe, precaution device, support and prior-warning device shell.Precaution device adopts infrared emission and the infrared reflection infrared sensor that is received in the same side, when object when sensor moves, the infrared ray of infrared transmitter emission, be moved the object reflection, then received by infrared remote receiver, infrared receiving module through special use converts light signal to electric signal, drives buzzer warning.The 100ml syringe is placed on the support, and bracket clamp can not move forward and backward on outer casing base.Precaution device is also on the prior-warning device shell of stuck-at-00ml syringe rack back, and makes syringe and precaution device keep certain distance.When gas reaches certain volume in the syringe, the precaution device warning of sounding.
In the thermal desorption process, the gas in the 100ml syringe is to be filled to 100ml gradually from 0ml, and this is a change procedure, utilize the principle of light reflection, when the fuse of syringe reaches when with precaution device certain distance being arranged, the light reflection produces response, cause the variation of electric signal, produce again and report to the police.First function of the utility model is to separate when being drawn onto 90ml when sample, and precaution device begins to give the alarm, and reminds operating personnel, and sample is about to resolve and finishes.Supervise the personnel that are busy with other work, get back to by the desorption instrument, separate by the time when being drawn onto 100ml gas, take off syringe.The specification that second function is the 100ml syringe all is consistent, therefore, takes off syringe if operating personnel can not be have in time separated at gas when being drawn onto 100ml, and alarm sound can be sustained, and reaches 140ml up to gas in syringe.
The utility model advantage is:
1, necessity: for carrying out " People's Republic of China's law on prevention and cure of occupational disease ", advance occupational health monitoring work for inspection, increase work efficiency, improve work quality.Thermal desorption work and the analytical work of chromatograph sample introduction are born by two people at present.If when bearing, attend to one thing and lose sight of another by a people.Even for operating personnel that know a thing or two, also can cause work to put upon the full stretch.After prior-warning device used, the work of being responsible for original two people by a people became lighter.Simultaneously, prevent that desorb is excessive, even sample loss.
2, science and practicality: device has reliability, easy operating and repairing, low cost.If when 90ml reported to the police, the staff took into account less than desorption instrument for a certain reason temporarily, in addition separate also take into account when being drawn onto 100ml less than, alarm sound can be sustained, and reaches 140ml up to gas in syringe.
Description of drawings
Fig. 1 is the utility model structural representation.1 is steel cylinder, 2 is to press table in the steel cylinder, 3 is delivery gauge, and 4 is the silicone rubber air body canal, and 5 is the 100ml spinner-type flowmeter, 6 are the thermal desorption stove, 7 for inserting the activated carbon tube of thermal desorption stove, and 8 is the 100ml syringe, and 9 is precaution device, 10 for putting the support of 100ml syringe, and 11 is prior-warning device base and shell.
Fig. 2 is that the utility model 100ml syringe uses synoptic diagram.The a point connects activated carbon tube, and b is a syringe shell, and c is the syringe fuse.3 syringes among Fig. 2 are represented the progressive process of syringe air inlet.Be followed successively by: syringe total length 20.5cm during air inlet not, air inlet is total length 29.5cm during to 90ml, and air inlet is total length 34.5cm during to 140ml,
Fig. 3 is the utility model thermal desorption stove, 100ml syringe, precaution device side schematic view.The d point advances stripping gas, and the e point connects syringe, f point emission infrared ray, g point receiving infrared-ray.
Fig. 4 be the utility model 100ml syringe and precaution device apart from synoptic diagram.When 90ml was arrived in air inlet, the face of syringe fuse and the distance of precaution device were 10.5cm.The alarm that begin to sound this moment.This moment syringe total length 29.5cm.
Fig. 5 is the utility model precaution device circuit diagram.The 12nd, infrared transmitter, the 13rd, infrared remote receiver.
Embodiment
Below in conjunction with description of drawings embodiment of the present utility model.
Each parts as shown in Figure 1:
1, tensimeter (generally using oxygen pressure reducer) and spinner-type flowmeter.After steel cylinder was turned on, a tensimeter showed the steel cylinder internal pressure, and another shows output pressure.Output pressure is big, and then delivery rate is big.Delivery rate can be regulated with the adjusting handle on the decompressor.Because used flow is less, delivery gauge can not show pressure, therefore, with a spinner-type flowmeter, shows roughly flow.We are with about 30ml/min.Just less owing to used flow, and the adjusting of adjusting handle is not very meticulous, within several hrs, delivery rate can not keep 30ml/min constant.
2, high accuracy temperature control thermal desorptioner (claiming the thermal desorption stove again).The JXL-4 type of Beijing Disease Prevention and Control Centre design, volume 6cm * 12.5cm * 20cm mainly is that electron device temperature regulating device, ring-type electrical heating wire, heater strip outsourcing heat-insulation layer in the box.On panel, can set heating-up temperature, show present temperature.The activated charcoal sampling pipe passes ring-type electrical heating wire (as dotted portion between Fig. 3 d, e) and is heated.
3, activated charcoal sampling pipe: internal diameter 3.5-4mm, external diameter 6mm, the glass tube of long 200mm, inner dress activated carbon granule, the activated carbon granule two ends clog with glass wool.The stripping gas of one end and flowmeter Control Flow joins during thermal desorption, and the other end joins with a bit of silicone rubber tube and syringe.
4,100ml syringe: adopt Shanghai laser device factory system medicine flying pigeon board human all-glass syringe, be unified specification, the long 17cm of shell, diameter 4.2cm.At 0ml, the length of syringe own is 20.5cm; When 90ml, injector length is 29.5cm; When 140ml, injector length is 34.5cm.As Fig. 2, a point connects activated carbon tube, and the toxic gas after the thermal desorption enters syringe.B is a syringe shell, and it is placed on the support fixed position, and purpose is to be maintained fixed constant distance with precaution device.C is the syringe fuse, and along with increasing of organic poison gas in the syringe, fuse moves backward, when with precaution device near when certain distance is 90ml, precaution device sends alarm like the pager sound, continues to report to the police until 140ml, urges the staff to take out syringe.
5, the rectangular parallelepiped box of precaution device: 12cm * 10cm * 6cm.As f point emission infrared ray among Fig. 3, g point receiving infrared-ray.F point and g point are at a distance of 0.5cm.Precaution device is just necessarily aimed at the syringe fuse facing to piston, particularly infrared emission point and acceptance point, because lean on the face reflected infrared of fuse.As shown in Figure 4, on the prior-warning device shell of precaution device stuck-at-00ml syringe rack back, syringe front end and precaution device front end distance are 40cm.As shown in Figure 5, precaution device adopts infrared emission and the infrared reflection infrared sensor that is received in the same side, when object when sensor moves, form the infrared ray that high harmonic oscillator produces certain frequency by 555 time base circuits, be moved the object reflection, then the infrared receiving diode that is received in the device receives, and converts light signal to electric signal through the infrared receiving module of special use, drives buzzer warning.Special-purpose infrared receiving module, its principle is through emitter follower with reception diode, insert operational amplification circuit, faint reflected signal is amplified, by close nernst voltage discriminator circuit, the signal voltage that the energy effective recognition has certain intensity prevents misoperation again,, promote the buzzing Normal Alarm after driving circuit amplifies.Infrared remote receiver has increased by the leaded multilayer ceramic capacitor C of 0.01 μ., it must be close to the input pin of infrared reception special chip.Because its filter function has strengthened the stability of system, when having prevented thermal desorptioner work to the interference of infrared acceptance division.Infrared reception special chip market is on sale.
6, prior-warning device shell: 50cm length * 13cm is wide * the 6cm height, the rectangle box-like body of top uncovered.The top uncovered is to pick and place syringe and insertion, taking-up activated charcoal sampling pipe for convenience.Outer casing bottom is as base, plays fixedly syringe and precaution device distance between the two.After the 100ml syringe is put into support, be stuck on the base, can not move forward and backward.The syringe fuse during to 90ml, reaches setpoint distance with precaution device along with desorption gas is full of, and precaution device is sounded.
Claims (5)
1, a kind of thermal desorptioner intelligent early-warning device, it has steel cylinder, tensimeter, spinner-type flowmeter, thermal desorption stove, the charcoal absorption pipe of adopting sample, 100ml syringe, it is characterized in that: described thermal desorptioner intelligent early-warning device also has precaution device, support and prior-warning device shell; The 100ml syringe is placed on the described support, and bracket clamp on the prior-warning device shell of described precaution device stuck-at-00ml syringe rack back, and makes syringe and precaution device maintain distance on described prior-warning device outer casing base.
2, thermal desorptioner intelligent early-warning device according to claim 1, it is characterized in that: described precaution device adopts infrared emission and the infrared reflection infrared sensor that is received in the same side, precaution device is just facing to piston, and infrared emission point and acceptance point are necessarily aimed at the syringe fuse.
3, thermal desorptioner intelligent early-warning device according to claim 2 is characterized in that: described infrared emission point and infrared acceptance point are at a distance of 0.5cm.
4, thermal desorptioner intelligent early-warning device according to claim 1 and 2 is characterized in that: described syringe front end and described precaution device front end distance are 40cm.
5, thermal desorptioner intelligent early-warning device according to claim 1 and 2, it is characterized in that: described precaution device transmitter is formed the infrared ray that high harmonic oscillator produces certain frequency by 555 time base circuits, in the receiver by the leaded multilayer ceramic capacitor C of infrared receiving diode, special-purpose infrared receiving module, hummer and 0.01 μ
oForm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520114135 CN2847289Y (en) | 2005-07-19 | 2005-07-19 | Intelligent early warning device for thermal desorption instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520114135 CN2847289Y (en) | 2005-07-19 | 2005-07-19 | Intelligent early warning device for thermal desorption instrument |
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| CN2847289Y true CN2847289Y (en) | 2006-12-13 |
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| CN 200520114135 Expired - Fee Related CN2847289Y (en) | 2005-07-19 | 2005-07-19 | Intelligent early warning device for thermal desorption instrument |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109442994A (en) * | 2017-03-02 | 2019-03-08 | 叶柳竹 | A kind of chemical industry smelting device quantitatively conveying chemical agent |
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2005
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109442994A (en) * | 2017-03-02 | 2019-03-08 | 叶柳竹 | A kind of chemical industry smelting device quantitatively conveying chemical agent |
| CN109442994B (en) * | 2017-03-02 | 2019-11-26 | 诸暨企周企业管理有限公司 | A kind of chemical industry smelting device quantitatively conveying chemical agent |
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| 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 |