CN202330102U - Gas circuit buffering structure of detection instrument - Google Patents
Gas circuit buffering structure of detection instrument Download PDFInfo
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- CN202330102U CN202330102U CN2011201790752U CN201120179075U CN202330102U CN 202330102 U CN202330102 U CN 202330102U CN 2011201790752 U CN2011201790752 U CN 2011201790752U CN 201120179075 U CN201120179075 U CN 201120179075U CN 202330102 U CN202330102 U CN 202330102U
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- pressing plate
- gas path
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Abstract
The utility model provides a gas circuit buffering structure of a detection instrument, which is mainly used for an instrument and precise detection equipment of a gas circuit. Gas detection equipment utilizes a gas pump to suck sample gas into the detection equipment; the fluctuation and the noises of the pump are inevitable so that air flow fluctuation is caused, the detection of weak signals are extremely interfered and a detection result is directly influenced. Aiming to the problem, the gas circuit buffering structure is introduced; and the structure has functions of stabilizing an air flow rate in a gas circuit and reducing the interference to a gas circuit flow curve. The structure comprises a cavity (1), an elastic cushion (2), a pressing plate (3) and gas circuit connectors (4), wherein the middle part of structure is the cavity (1) and the structure is a squared hollow cavity; two gas circuit connectors (4) are arranged at the top and the outer layer has the same shape; a white silica gel plate and the elastic cushion (2) are fixedly arranged on the cavity (1) by a stainless steel plate through bolts, so as to form a closed cavity structure; and an air flow is introduced in and led out from an air inlet connector and an air outlet connector. The cavity provided by the utility model can buffer the passing air flow and stabilize the flow rate.
Description
One, technical field
The utility model relates to a kind of accurate gas analyzer, the gas circuit rock-steady structure of fine measuring instrument.Application is limited in the gas detection equipment, especially gas circuit is required accurate instrument and equipment.Exact instrument is used in the laboratory, and than higher, flow rate disturbance compares in the overall situation final detection signal to the instrument traffic requirement.
Two, background technology
Gas analysis instrument and gas detection equipment quantity are huge; Of a great variety; Wherein using aspiration pump comes the take a sample instrument that detects of gas circuit not within minority; Because air pump (no matter being sliding vane rotary pump or membrane pump) self principle causes the intrinsic fluctuation of gas circuit bring very perturbation can for the detection signal of gas, all must take periodic disturbance or external factor that a kind of effective measures reduce air-flow in the detection gas circuit that aspiration pump brings to detecting the interference of air-flow.
Three, utility model content
1. goal of the invention:
The purpose of the utility model is in order for accurate gas test instrument a reliable and stable stabilizing gas flow to be provided, to reduce gas tester, undesired signal and test curve fluctuation that gas analyzer brings because of the air-flow instability.
2. technical scheme
A kind of gas circuit buffer structure of detecting instrument is characterized in that: this structure comprises cavity (1), cushion (2), pressing plate (3), gas path joint (4); The intermediate portion is divided into cavity (1); Structure is square, and the centre is a circular port, and 2 gas path joints (4) are installed at cavity (1) top; Pressing plate (3) is a corrosion resistant plate; Through bolt white silica gel plate cushion (2) is press fit on the cavity (1), forms an annular seal space structure, the top is introduced air-flow and draw by the intake interface and the interface of giving vent to anger; A kind of gas circuit buffer structure of detecting instrument is characterized in that cavity (1) material is a duralumin by the hollow cavity of a circle of Precision Machining in the middle of the intermediate structure cavity (1), and the polishing oxidation processes is adopted in surface treatment; In process, this structure inside surface surfaceness is not more than Ra3.2, and 2 threaded holes are arranged at cavity (1) top, and hole depth cylinder direct and cavity (1) center connects; 2 conical gas path joints (4) are installed here, and gas path joint (4) adopts duralumin, and the true qualities anodization is adopted in surface treatment, when gas path joint (4) is installed; Earlier be coated with fluid sealant for gas path joint (4) root, then gas path joint (4) screwed in the corresponding threaded hole in cavity (1) top, cushion (2) is a resilient material, cleaning surfaces; No marking, no bubble, smooth; Cushion (2) selection is white silicane rubber plate, smooth cavity (1) both sides that are attached to of cushion (2), and the outside is pressed onto on the cavity (1) with pressing plate (3); With cross coiled hair screw retention, pressing plate (3) material selection corrosion resistant plate can prevent because of factor corrosions such as environment; Because this buffer structure requires impermeability, pressing plate (3) surface requirements is smooth, no marking; Surface planarity is not more than 0.15, and pressing plate (3) is shaped as square plate, and there is circular hollow out at the center; This cavity is to cushioning the effect with stability of flow through air-flow, its concrete structure is as shown in Figure 1, and gas detection equipment adopts aspiration pump that sample gas is sucked checkout equipment; Because the fluctuation and the noise of pump are inevitable, in gas circuit, play the stabilizing gas flow, reduce the effect that the gas circuit flow curve disturbs; The periodicity flow perturbation that is brought by aspiration pump disturbs maximum; Also be that inevitably we can only reduce the disturbing factor of aspiration pump here, the periodic disturbance that adopts this structure that aspiration pump is brought absorbs the vibrations of gas circuit through the high elastic rubber plate generation elastic deformation of buffering cavity both sides; The intracavity space of buffer structure is big more; High elastic rubber plate elastic deformation zone is big more, and is just good more to the absorption of air-flow periodic disturbance, just few more to the influence of final gas detection signals.
3. technique effect
Fig. 2 is that it is smoother that the detector signal end is measured signal waveforms, as shown in Figure 3 when inserting the gas circuit buffer structure in the gas circuit; When inserting the gas circuit buffer structure in the gas circuit not; Promptly when the pipeline of flow sensor endpiece directly inserts the suction end of aspiration pump; It is as shown in Figure 4 promptly not insert the gas circuit buffer structure; From detecting signal that tolerance gets shown in Fig. 5 oscillogram, the cosine wave (CW) of its 2.0kHz disturbs big especially, due to gas circuit that Here it is is disturbed.
Conclusion: it is as shown in Figure 5 to measure signal waveform from the detector signal end: whole signal noise is bigger, this shows, the gas circuit buffer structure is significant for small-signal gas suction-type test facilities and instruments.
Four, description of drawings
Fig. 1 is a gas circuit buffer structure wiring layout, and wherein (1) is cavity, and material is a duralumin, and surface treatment is the true qualities oxidation; (2) be cushion, material is white silicon rubber, and (3) are pressing plate, and material is a stainless steel; (4) be gas path joint, material is a duralumin, and surface treatment is the true qualities oxidation;
Fig. 2 is the installation diagram that the gas circuit buffer structure is installed in the instrument;
Fig. 3 demonstrates level and smooth oscillogram for instrument after in the instrument gas circuit buffer structure being installed;
Fig. 4 is for removing the installation diagram of gas circuit buffer structure in the instrument;
Fig. 5 is for having removed the very large oscillogram of interference that instrument demonstrates behind the gas circuit buffer structure in the instrument.
Five, embodiment
Below in conjunction with accompanying drawing further detailed description is done in the enforcement of the utility model.As shown in Figure 1, he is mainly by cavity (1), cushion (2), and pressing plate (3), gas path joint (4) is formed.
At first 2 the threaded gas path joints in top (4) root is coated with fluid sealant, then it is screwed in corresponding 2 threaded holes in cavity (1) top, screw; Then; Get cushion (2), its material is white transparent silicon rubber slab, and it is attached to cavity (1) surface; Guarantee that on it align with the hole on the cavity (1) one by one in 8 holes, note keeping smooth; Pressure plate again, its material is a corrosion resistant plate, with its with cushion on the hole align one by one, with the cross pan head screw cushion, pressing plate are fixed on the cavity (1) at last; In like manner, cavity (1) opposite side is also fixing in the same way, forms a resilient seal chamber, and for reducing weight, cavity (1) material is used duralumin here, and both ends of the surface and inside surface machining precision remain on below 3.2, and flatness is below 0.15; Install the inspection impermeability; It is smooth to note keeping the cleaning of cushion in the installation process, after test finishes, just can this gas circuit buffer structure be connected in series in the gas circuit.
Claims (2)
1. the gas circuit buffer structure of a detecting instrument, it is characterized in that: this structure comprises cavity (1), cushion (2), pressing plate (3), gas path joint (4); The intermediate portion is divided into cavity (1); Structure is square, and the centre is a circular port, and 2 gas path joints (4) are installed at cavity (1) top; Pressing plate (3) is a corrosion resistant plate; Through bolt white silica gel plate cushion (2) is press fit on the cavity (1), forms an annular seal space structure, the top is introduced air-flow and draw by the intake interface and the interface of giving vent to anger.
2. the gas circuit buffer structure of a kind of detecting instrument according to claim 1 is characterized in that cavity (1) material is a duralumin by the hollow cavity of a circle of Precision Machining in the middle of the intermediate structure cavity (1), and the polishing oxidation processes is adopted in surface treatment; In process, this structure inside surface surfaceness is not more than Ra3.2, and 2 threaded holes are arranged at cavity (1) top; Hole depth cylinder direct and cavity (1) center connects, and 2 conical gas path joints (4) are installed here, and gas path joint (4) adopts duralumin; The true qualities anodization is adopted in surface treatment, when gas path joint (4) is installed, is coated with fluid sealant at gas path joint (4) root earlier; Then gas path joint (4) is screwed in the corresponding threaded hole in cavity (1) top, cushion (2) is a resilient material, and selection is white silicane rubber plate; Relatively soft, smooth cavity (1) both sides that are attached to of cushion (2), the outside is pressed onto on the cavity (1) with pressing plate (3); With cross coiled hair screw retention, pressing plate (3) material selection corrosion resistant plate can prevent because of factor corrosions such as environment; Because this buffer structure requires impermeability, pressing plate (3) surface requirements is smooth, no marking; Surface planarity is not more than 0.15, and pressing plate (3) is shaped as square plate, and there is circular hollow out at the center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201790752U CN202330102U (en) | 2011-05-31 | 2011-05-31 | Gas circuit buffering structure of detection instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201790752U CN202330102U (en) | 2011-05-31 | 2011-05-31 | Gas circuit buffering structure of detection instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202330102U true CN202330102U (en) | 2012-07-11 |
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ID=46442080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201790752U Expired - Lifetime CN202330102U (en) | 2011-05-31 | 2011-05-31 | Gas circuit buffering structure of detection instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202330102U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106645472A (en) * | 2016-12-08 | 2017-05-10 | 同方威视技术股份有限公司 | Gas chromatography-ion mobility spectrometry device |
| CN112129091A (en) * | 2020-09-22 | 2020-12-25 | 中广核核电运营有限公司 | Capillary line sweeps drying system |
-
2011
- 2011-05-31 CN CN2011201790752U patent/CN202330102U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106645472A (en) * | 2016-12-08 | 2017-05-10 | 同方威视技术股份有限公司 | Gas chromatography-ion mobility spectrometry device |
| CN112129091A (en) * | 2020-09-22 | 2020-12-25 | 中广核核电运营有限公司 | Capillary line sweeps drying system |
| WO2022062913A1 (en) * | 2020-09-22 | 2022-03-31 | 中广核核电运营有限公司 | Capillary line purge drying system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120711 |
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| CX01 | Expiry of patent term |