CN105092314A - Apparatus for collecting head-space gas, and method using apparatus - Google Patents
Apparatus for collecting head-space gas, and method using apparatus Download PDFInfo
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- CN105092314A CN105092314A CN201410222849.3A CN201410222849A CN105092314A CN 105092314 A CN105092314 A CN 105092314A CN 201410222849 A CN201410222849 A CN 201410222849A CN 105092314 A CN105092314 A CN 105092314A
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Abstract
The invention provides an apparatus for collecting head-space gas. The apparatus comprises a container, a sealing cover detachably connected with the container, a gas hole and a liquid hole which are arranged on the sealing cover and are used for connecting the inside and the outside of the container, a gas hole sealing cover and a liquid hole sealing cover respectively detachably connected with the gas hole and the liquid hole, a gas hole sealing gasket arranged between the gas hole and the gas hole sealing cover, and a liquid hole sealing gasket arranged between the liquid hole and the liquid hole sealing gasket, wherein the end surface of the opening of the container is circumferentially provided with a first slot, the end surface of the opening of the sealing cover is circumferentially provided with a second slot, a wall for limiting the second slot is accommodated in the first slot, a wall for limiting the first slot is accommodated in the second slot, a sealing ring is arranged in each of the first slot and the second slot, the wall of the second slot corresponding to the first slot is a sealing ring in sealed contact with the first slot, and the wall of the first slot corresponding to the second slot is a sealing ring in sealed contact with the second slot. The invention also provides a method using the apparatus.
Description
Technical field
The present invention relates to oil and gas geochemical exploration and environmental surveys field, be specifically related to a kind of for the device of static headspace gas collection and the method for operative installations.
Background technology
In geochemical prospecting, the acquisition technique of static headspace gas is mainly by loading in container by sample, and leave certain space sealing preservation, be discharged in container at the weakly stable state gas of solid (liquid) body particle surface by nature desorb, after the gas of headroom and the weakly stable state gas equilibrium of solid (liquid) body particle surface, the gas in inspection instrument.
Static headspace gas sample preserved by normal glass saline bottle or the sealing cylinder of adopting at present, but in analysis of experiments process, often find some glass saline bottle or the gas leakage of sealing cylinder, and glass saline bottle occurs damaged even in transit.And the distortion that these samples produce due to damaged and gas leakage, cause very large error to geologic interpretation, thus have impact on analysis quality.
Summary of the invention
For the problems referred to above existing in prior art, the present invention proposes a kind of device gathered for static headspace gas, its structure is simple, good sealing effect, easy to use.The invention still further relates to the method using this device.
According to an aspect of the present invention, provide a kind of device gathered for static headspace gas, comprise container, the capping be connected with container energy detachable, be arranged on inside and outside gas port and the liquid mouth of energy connection container in capping, the gas port capping be connected with gas port and liquid mouth difference energy detachable and the capping of liquid mouth, and the gas port sealing gasket be arranged between gas port and gas port capping and the liquid mouth sealing gasket be arranged between liquid mouth and the capping of liquid mouth, wherein, the open end of container circumferentially arranges the first groove, the open end of capping circumferentially arranges the second groove, wall for limiting the second groove is contained in the first groove, wall for limiting the first groove is contained in the second groove, in first groove and in the second groove, all O-ring seal is set, the wall of second groove corresponding with the first groove is set to the O-ring seal that energy enclosure-type touches the first groove, the wall of first groove corresponding with the second groove is set to the O-ring seal that energy enclosure-type touches the second groove.
Thus, after by soil sample embedding device, capping is covered on container, the wall of the O-ring seal of the first groove of container and the second groove of corresponding capping coordinates, the O-ring seal of the second groove of capping simultaneously coordinates with the wall of the first groove of cell therefor, define two seals, enhance sealing effectiveness, avoid the generation of gas leak phenomenon.
In one embodiment, the ratio that the width of the first groove is wide with the wall of the second corresponding groove is 1.05 ~ 2, and/or the width of the second groove ratio wide with the wall of the first corresponding groove is 1.05 ~ 2.By this arrangement achieve that the wall of the first groove and the second corresponding groove is clearance fit, and/or the second groove is clearance fit with the wall of the first corresponding groove, thus together with being conducive to capping to be installed to container, achieves Fast Installation.Meanwhile, make the O-ring seal of the wall energy of the second groove and the first groove have rational contact area by above-mentioned setting, and/or the O-ring seal of the wall energy of the first groove and the second groove has rational contact area, thus ensure that equalization of pressure, be conducive to better sealing.And ensure that the wall of the first groove is wide by above-mentioned setting, and/or the self-strength that the wall of the second groove is wide, facilitate manufacture simultaneously.
In one embodiment, the degree of depth of the first groove and/or the degree of depth of the second groove are 3 ~ 20mm.By this arrangement ensure that coordinating of the wall of the first groove and the second groove, and/or ensure that the coordinating of wall of the second groove and the first groove, thus ensure that sealing effectiveness.It is convenient to processing simultaneously, is easy to realize.
Preferably, the degree of depth of the first groove is identical with the degree of depth of the second groove.Made by this set the acting force of the wall of the acting force of the wall of the O-ring seal of the first groove and corresponding second groove and the O-ring seal of the second groove and the first corresponding groove balance each other, ensure that the wall of the second groove and the wall energy of the first groove push against the O-ring seal of the first groove and the O-ring seal of the second groove respectively.Which thereby enhance sealing effectiveness.This structure is simple simultaneously, is easy to realize.
In one embodiment, in the outside of the outer wall of the first groove, the buckle matched is set with the inner side of the outer wall of the second groove, or at the buckle matched with the arranged outside of the outer wall of the second groove in the inner side of the outer wall of the first groove.Together with container being advantageously connected to capping by this set, achieve Fast Installation.Meanwhile, this kind of structure can avoid capping loosen relative to container and produce gas leak phenomenon.Thus, enhance sealingly secure, ensure precision of analysis.
In one embodiment, capping is set to the inner chamber of arcuation.Preferably, gas port is arranged on the top place of the inner chamber of arcuation.Facilitated the air accumulation in container by this set, ensure that the accuracy of analysis result.
Preferably, container is made up of polycarbonate.Utilize the features such as its hardness is high, quality light, good weatherability, be applicable to the preservation transport of sample and recycle.
Preferably, container is provided with containing mark.Can quantitative sample volume by this set.
According to a further aspect in the invention, provide a kind of method using said apparatus, comprise the following steps:
Step one: enter a certain amount of saturated nacl aqueous solution toward container content;
Step 2: fresh soil samples is put into container, makes the liquid level of saturated nacl aqueous solution arrive second quantitative;
Step 3: utilize lidstock container;
Step 4: the device of pedotheque is equipped with in concussion, makes headspace gas in the gas of pedotheque surface weakly stable state and device exchange;
Step 5: stationary apparatus makes headspace gas balance in it, injects saturated nacl aqueous solution, make the gaseous tension high pressure outer air pressure in device from liquid mouth in device;
Step 6: collect gas by gas port.
In above process, ensure that gas sealing in a device, ensure that the accuracy of sample analysis.
Preferably, before step 3, namely before capping is installed to container, in the first groove, add saturated nacl aqueous solution.Thus fluid-tight is defined between capping and container, more ensure that the sealing effectiveness of container and capping.
Compared with prior art, the invention has the advantages that, apparatus structure is simple, good sealing effect, can quick-mounting sample soon, is convenient to transport, reusable, and easy to operate.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail.In the drawings:
Fig. 1 shows according to the device gathered for static headspace gas of the present invention;
Fig. 2 shows the vertical view of the container of the device from Fig. 1.
In the accompanying drawings, identical parts use identical Reference numeral.Accompanying drawing is not according to the scale of reality.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described.
Fig. 1 shows according to the device 50 gathered for static headspace gas of the present invention.As shown in Figure 1, device 50 comprise container 2, with container 2 can detachable is connected capping 1, the gas port 3 be arranged in capping 1, the liquid mouth 4 be arranged in capping 1, the gas port capping 15 be connected with gas port 3 energy detachable, with the liquid mouth capping 16 that is connected of liquid mouth 4 energy detachable, and the gas port sealing gasket 17 be arranged between gas port 3 and gas port capping 15 and the liquid mouth sealing gasket 18 be arranged between liquid mouth 4 and liquid mouth capping 16.The circumference of the open end 5 of container 2 arranges the first groove 6, the circumference of the open end 7 of capping 1 arranges the second groove 8, wall (inwall 14 or outer wall 13) for limiting the second groove 8 is contained in the first groove 6, wall (outer wall 11 or inwall 12) for limiting the first groove 6 is contained in the second groove 8, in first groove 6, O-ring seal 9 is set, in the second groove 8, O-ring seal 10 is set.In the state that container 2 and capping 1 are installed, the wall (inwall 14 or outer wall 13) of second groove 8 corresponding with the first groove 6 is set to the O-ring seal 9 that energy enclosure-type touches the first groove 6, and the wall (outer wall 11 or inwall 12) of first groove 6 corresponding with described second groove 8 is set to the O-ring seal 10 that energy enclosure-type touches the second groove 8.Thus form double-layer seal, add the sealing effectiveness of device 50, avoid the generation of gas leak phenomenon in preservation, transport or process of the test.
As depicted in figs. 1 and 2, preferably, O-ring seal 9 and O-ring seal 10 are elastic silica gel O RunddichtringO.
If the circumferential size of capping 1 is greater than the circumferential size of container 2, as shown in Figure 1, namely the outer wall 11 of the first groove 6 is matched with in the second groove 8, and the inwall 14 of the second groove 8 is matched with in the first groove 6.The width of the first groove 6 is 1.05 ~ 2 with the ratio of the width of the inwall 14 of the second corresponding groove 8, and/or the width of the second groove 8 is 1.05 ~ 2 with the width ratio of the inwall 11 of the first corresponding groove 6.First groove 6 and inwall 14 are clearance fit, and/or the second groove 8 is clearance fit with inwall 11, thus together with being conducive to capping 1 to be installed to easily with container 2, realize Fast Installation.Meanwhile, inwall 14 can have rational contact area with the O-ring seal 9 of the first groove 6, and/or inwall 11 can have rational contact area with the O-ring seal 10 of the second groove 8, thus ensure that equalization of pressure, is conducive to better sealing.Convenient manufacture simultaneously.That the term " width " in this application is radial dimension with should be noted that.
In order to ensure better sealing effectiveness, the degree of depth of the first groove 6 and/or the degree of depth of the second groove 8 are 3 ~ 20mm.Be that the degree of depth of the first groove 6 is the distance of bottom land to end face 5 of the first groove 6 with should be noted that, the degree of depth of the second groove 8 is the distance of bottom land to end face 7 of the second groove 8.Preferably, the degree of depth of the first groove 6 is identical with the degree of depth of the second groove 8.The acting force of the outer wall 11 of the O-ring seal 9 of the first groove 6 and the acting force of inwall 14 of corresponding second groove 8 and the O-ring seal 10 of the second groove 8 and the first corresponding groove 6 balances each other, and ensure that the inwall 14 of the second groove 8 and the outer wall 11 of the first groove 6 can push against O-ring seal 9 and O-ring seal 10 respectively.Which thereby enhance sealing effectiveness.This structure is simple simultaneously, is conducive to processing and manufacturing.
As shown in Figure 1, on the outside of the outer wall 11 of the first groove 6 and on the inner side of the outer wall 13 of the second groove 8, the buckle 19,20 cooperatively interacted is set, for container 2 and capping 1 being fixed together.This syndeton is simple, is easy to realize, and ensure that quick connection.Not easily lost efficacy in preservation sample or transportation simultaneously, effectively ensure that sealing.
It should be noted that, if the circumferential size of capping 1 is less than the circumferential size (not shown) of container 2, namely in capping 1 with container 2 engagement process, the first groove 6 holds the outer wall 13 of the second groove 8, and the second groove 8 holds the inwall 12 of the first groove 6.Meanwhile, at the buckle matched with the arranged outside of the outer wall 13 of the second groove 8 in the inner side of the outer wall 11 of the first groove 6.In like manner this set also can realize double seal.Protection scope of the present invention should be fallen into thus.Its structure and matching relationship same as described above or similar, omit detailed description at this.
Preferably, container 2 is cylindric.The outer wall of container 2 is provided with volume scale.Further preferably, container 2 is made up of polycarbonate.Utilize the features such as its hardness is high, quality light, good weatherability, be applicable to the preservation transport of sample and recycle, and there is the transparency, achieving the quantitative of sample.
Air accumulation conveniently in device 50, guarantees the authenticity of sample, and as shown in Figure 1, the inner chamber of capping 1 is set to arcuation.Preferably, gas port 3 is arranged on arcuation inner chamber top, is more conducive to getting gas from gas port 3.
The method that operative installations 50 gathers static headspace gas is described below in detail:
First, in container 2, load the saturated nacl aqueous solution of 200ml; Secondly, fresh soil samples is put into container 2, make liquid level of solution arrive the scale of container 500ml; Again, capping 1 is coordinated with container 2, rotate, utilize buckle 19,20 to coordinate, capping 1 and container 2 are snapped together (fractional saturation sodium chloride solution can also be added in the first groove 6, make the sealing effectiveness between container 2 and capping 1 better); Then, the packoff 50 that sample is housed to be placed in oscillator, and with the speed of 60 times/min concussion 60min, make the gas of sample surfaces weakly stable state fully and device 50 headspace gas exchange; Then, static for device 50 30min is made headspace gas balance in it, in device 50, inject a certain amount of saturated nacl aqueous solution from liquid mouth 4, make the gas in container 2 be barotropic state; Finally, from gas port 3, utilize the gas in syringe or sampler evacuation container 2.
The foregoing is only the preferred embodiment of the present invention; but scope is not limited thereto; any those skilled in the art, in technical scope disclosed by the invention, can easily carry out changing or changing, and this change or change all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (11)
1. the device gathered for static headspace gas, comprise container, the capping be connected with described container energy detachable, be arranged on the inside and outside gas port and liquid mouth that described capping can be communicated with described container, the gas port capping be connected with described gas port and described liquid mouth difference energy detachable and the capping of liquid mouth, and the gas port sealing gasket be arranged between described gas port and described gas port capping and the liquid mouth sealing gasket be arranged between described liquid mouth and the capping of described liquid mouth, wherein, the open end of described container circumferentially arranges the first groove, the open end of described capping circumferentially arranges the second groove, wall for limiting described second groove is contained in described first groove, wall for limiting described first groove is contained in described second groove, in described first groove and in described second groove, all O-ring seal is set, the wall of described second groove corresponding with described first groove is set to the O-ring seal that energy enclosure-type touches described first groove, the wall of described first groove corresponding with described second groove is set to the O-ring seal that energy enclosure-type touches described second groove.
2. device according to claim 1, is characterized in that, the ratio that the width of described first groove is wide with the wall of corresponding described second groove is 1.05 ~ 2, and/or the width of the described second groove ratio wide with the wall of corresponding described first groove is 1.05 ~ 2.
3. device according to claim 1 and 2, is characterized in that, the degree of depth of described first groove and/or the degree of depth of described second groove are 3 ~ 20mm.
4. the device according to any one of Claim 1-3, is characterized in that, the degree of depth of described first groove is identical with the degree of depth of described second groove.
5. the device according to any one of claim 1 to 4, it is characterized in that, in the outside of the outer wall of described first groove, the buckle matched is set with the inner side of the outer wall of described second groove, or at the buckle matched with the arranged outside of the outer wall of described second groove in the inner side of the outer wall of described first groove.
6. device according to claim 1, is characterized in that, described capping is set to the inner chamber of arcuation.
7. device according to claim 6, is characterized in that, described gas port is arranged on the top place of the inner chamber of described arcuation.
8. device according to claim 1, is characterized in that, described container is made up of polycarbonate.
9. device according to claim 1, is characterized in that, described container is provided with containing mark.
10. use the device according to any one of claim 1 to 9 to gather a method for static headspace gas, comprise the following steps:
Step one: enter a certain amount of saturated nacl aqueous solution toward described container content;
Step 2: fresh soil samples is put into described container, makes the liquid level of described saturated nacl aqueous solution arrive second quantitative;
Step 3: utilize container described in described lidstock;
Step 4: the described device of pedotheque is equipped with in concussion, makes headspace gas in the gas of pedotheque surface weakly stable state and described device exchange;
Step 5: static described device makes headspace gas balance in it, injects described saturated nacl aqueous solution, make the gaseous tension high pressure outer air pressure in described device from described liquid mouth in described device;
Step 6: collect gas by gas port.
11. methods according to claim 10, is characterized in that, before described step 3, in described first groove, add saturated nacl aqueous solution.
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| CN201410222849.3A CN105092314B (en) | 2014-05-23 | 2014-05-23 | Apparatus for headspace collection and method of using the same |
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| CN201410222849.3A CN105092314B (en) | 2014-05-23 | 2014-05-23 | Apparatus for headspace collection and method of using the same |
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| CN107271226A (en) * | 2017-07-18 | 2017-10-20 | 上海化工研究院有限公司 | A kind of direct sampling apparatus of ml headspace bottle carried for aerial photography device |
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| CN108918338A (en) * | 2018-07-06 | 2018-11-30 | 苏州冠德能源科技有限公司 | Landwaste storage device for shale gas isotope analysis |
| CN112255385A (en) * | 2020-10-30 | 2021-01-22 | 华东师范大学 | System and method for in-situ continuous determination of concentration of greenhouse gas in high-turbidity water body and application |
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