CN206832504U - Water sampler - Google Patents

Abstract

A kind of water sampler, including sampling container, the sampling container are provided with the first connector for inputting water sample and the second connector for discharging gas in sampling container.First connector is connected with sealed valve, and second connector is connected with the first trap for adsorbing volatile organic matter.Floating seal arrangement is installed, described floating seal arrangement includes the sleeve pipe being connected with the second connector, and is used in sleeve pipe by the float of the second connector closure in the sampling container.Described sleeve pipe side wall is provided with blow vent, and the blow vent is connected with reflux pipe, and described reflux pipe one end is located at the bottom of the sampling container.Water sampler can carry out closing collection, when water sample injects, gas can only be discharged by trap, make the volatile organic matter in water sample be caught storage absorption, will not be emitted in air, the loss of volatile organic matter is avoided, ensures the quality control in sampling process.

Description

Water sampler

Technical field

The utility model belongs to environmental monitoring, more particularly to a kind of water sample that can prevent that volatile materials from leaking is adopted Storage.

Background technology

Volatile organic matter (Volatile Organic Compounds, hereinafter referred to as abbreviation VOCs, VOCs) is used as O₃ And PM_2.5Common precursor thing, turn into the emphasis atmosphere pollution of China's management and control at present.In petrochemical industry, pharmacy, agricultural chemicals, printing and dyeing, painting The industries such as dress, chemical industry, the VOC dissolved in the defeated reclaimed water with processing procedure of effluent sewage collection can be evaporated, so as to spill into air, Pollute.There is data to show, the VOCs of sewage collection transmission processing and recirculating cooling water system loss is petrochemical industry VOCs pollutions The main contribution source of source item, accounting are generally higher than 40%.

Two links of VOCs monitoring needs spot sampling and lab analysis in water quality, the accuracy of testing result need two Individual link all carries out systematically quality control.In sampling process, traditional method is the sampling container with certain capacity, is passed through Outer connected with water faucet of pipeline etc. is exported, and detection water sample is directly attached in sampling container, and open collection is carried out to detection water sample.

But this kind of method be when water sample is transferred to sampling container, due to the dynamic change of physical environment, water sample, The dissolution equilibrium of VOCs scripts in the duct is destroyed, and the VOCs materials in water can be spilt into air by volatilizing, flashing.Therefore Sample VOCs materials in gatherer process can be caused just to have begun to loss, make final testing result less than normal.If pipeline band Pressure, then the loss in the case of this flash distillation can be more, and final testing result will be smaller.Therefore, traditional open sampling Device can not complete the accurate trapping sampling to the waste water containing VOCs.

Utility model content

The utility model easily makes VOCs materials be lost in because volatilizing, flashing for above-mentioned existing acquisition mode, detection knot Fruit accuracy difference technical problem, propose it is a kind of prevent volatile materials from leaking, the water sampler that detection accuracy is high.

In order to achieve the above object, the technical solution adopted in the utility model is：

A kind of water sampler, including sampling container, the sampling container are provided with the first connection for inputting water sample Mouth and the second connector for discharging gas in sampling container.

First connector is connected with sealed valve, and second connector is connected with for adsorbing volatile organic matter The first trap.

Floating seal arrangement is installed, described floating seal arrangement includes and the second connector phase in the sampling container Sleeve pipe even, and be used in sleeve pipe by the float of the second connector closure.

Described sleeve pipe side wall is provided with blow vent, and the blow vent is connected with reflux pipe, and described reflux pipe one end is located at institute State the bottom of sampling container.

Preferably, the width of the blow vent is less than the thickness of the float.

Preferably, second connector is shoulder hole, be divided into the counterbore section for accommodating float and internal diameter be less than it is heavy The linkage section of hole section, described sleeve pipe are connected with counterbore section, and the external diameter of the float is more than the internal diameter of linkage section.

Preferably, the thickness of the counterbore section is identical with the thickness of float, the internal diameter of the counterbore section and float it is outer Footpath is identical.

Preferably, the outer wall of the float and the inwall gap of sleeve pipe coordinate.

Preferably, the locating part for stopping float abjection sleeve pipe is provided with internal surface of sleeve pipe below the float.

Preferably, first trap is connected with the second trap.

Preferably, being provided with deflector in the sampling container, described deflector one end is connected with the first connector, separately One end is located at the bottom of sampling container.

Compared with prior art, it is the advantages of the utility model with good effect：

1st, water sampler can carry out closing collection, and when water sample injects, gas can only be discharged by trap, make water Volatile organic matter in sample be caught storage absorption, will not be emitted in air, avoid the loss of volatile organic matter, ensure to adopt Quality control during sample.

2nd, the floating seal arrangement set can carry out automatic constant volume sealing to sampling container.The reflux pipe of setting can incite somebody to action Float is blown open, while water sample is aerated, and structure brief introduction and realizes multiple functions.

3rd, another trap of installation prevents that existing volatile organic matter itself is made to detection accuracy in air Into influence.

4th, water sample can be directly sent to sampling container bottom by the deflector set, prevent water sample from being splashed in sampling container Rise, avoid water sample from being splashed into the second connector, cause to spill, while ensure that the stability of water sample, avoid " splashing type " from adopting Loss excessive VOCs caused by sample.Deflector also enables the purge gas of feeding sampling container fully be contacted with water sample, makes Volatile organic matter in water sample all can enter gas phase by stripping, improve detection accuracy.

Brief description of the drawings

Fig. 1 is the structural representation of water sampler；

Fig. 2 is the structural representation at the second connector in water sampler；

Above in each figure：1st, sampling container；2nd, the first connector；3rd, the second connector；4th, sealed valve；5th, the first trapping Device；6th, the second trap；7th, deflector；8.1st, sleeve pipe；8.2nd, float；8.3rd, blow vent；8.4th, locating part；8.5th, reflux pipe.

Embodiment

Below, the utility model is specifically described by exemplary embodiment.It should be appreciated, however, that do not having In the case of being further discussed below, element, structure and features in an embodiment can also be advantageously incorporated into other implementations In mode.

, it is necessary to explanation, term " interior ", " outer ", " on ", " under ", "front", "rear" etc. in description of the present utility model The orientation or position relationship of instruction are based on position relationship shown in the drawings, are for only for ease of description the utility model and simplification Description, rather than the device or element of instruction or hint meaning must have specific orientation, with specific azimuth configuration and behaviour Make, therefore it is not intended that to limitation of the present utility model.In addition, term " first ", " second ", " the 3rd " are only used for describing mesh , and it is not intended that instruction or hint relative importance.

As shown in Fig. 1 to 2, water sampler includes sampling container 1, sampling container 1 be provided with for input water sample One connector 2 and the second connector 3 for discharging gas in sampling container 1.

First connector 2 is connected with sealed valve 4, the second connector 3 be connected with for adsorb volatile organic matter One trap 5.

Sample lines are provided with the pipeline of the waste water containing volatile organic matter, Sampler valves are installed in sample lines, are opened Sampler valves, the liquid conveyed in pipeline can leave pipeline by sample lines.

Sealed valve 4 connects sample lines, opens Sampler valves and sealed valve 4, and the liquid in pipeline passes through sampling pipe Road, the connector 2 of sealed valve 4 and first are entered in sampling container 1.The water sample being gradually entered in sampling container 1 occupies, and Originally the gas in sampling container 1 was then squeezed by water sample, was discharged by the second connector 3 and the first trap 5.

After loading a certain amount of water sample in sampling container 1, close Sampler valves and sealed valve 4, by water sampling device with Sample lines disconnect, and sampling terminates, while the first connector 2 is sealed.During entering sampling container 1 due to water sample, water A volatile organic matter part in sample can be emitted in the gas-phase space in sampling container 1 more than liquid level, and passes through therewith Two connectors 3 enter the first trap 5, are adsorbed by the first trap 5, prevent the volatile organic matter to be detected from entering Air, cause damage, ensure sampling quality.The top surface inclination of sampling container 1 is set, and the first connector 2 is located at sampling container 1 and pushed up Portion, inclined top surface drain to gas, gas is focused at the first connector 2, so as to more glibly from sampling container 1 Discharge.

In order to be acquired constant volume to water sample, floating seal arrangement is installed in sampling container 1.Floating seal arrangement includes The sleeve pipe 8.1 being connected with the second connector 2, and the float 8.2 in sleeve pipe 8.1 for the second connector 3 to be blocked.

Because float 8.2 possesses buoyancy, when the liquid level of water sample in sampling container 1 is gradually increasing, float 8.2 is also in sleeve pipe Float in 8.1, until float 8.2 reaches the second connector 3, the second connector 3 is blocked therewith.Float 8.2 passes through closure the Two connectors 3, the second connector 3 is sealed, now the gas in sampling container 1 can not exclude, and water sample can not also continue Into the capacity of carrying water sample is fixed in sampling container 1.When sleeve pipe 8.1 makes the float 8.2 float to top, it can align Second connector 3, float 8.2 is set exactly to seal the second connector 3.

In order to which the second connector 3 is opened, while water sample in sampling container 1 is aerated, the side wall of sleeve pipe 8.1 is provided with logical Gas port 8.3, blow vent 8.3 are connected with reflux pipe 8.5, and the one end of reflux pipe 8.5 is located at the bottom of the sampling container 1.

After the completion of water sampling, purge and trap is carried out.First trap 5 is connected into pumping installations, opens sealed valve 4, And the 3rd trap is installed on sealed valve.Pumping installations pumps high-purity helium by the first trap 5 to the second connector 2 Or nitrogen, high-purity helium or nitrogen wash the float 8.2 on the second connector 2 open, and enter in sleeve pipe 8.1, then lead to again Cross blow vent 8.3 and enter reflux pipe 8.5, entered eventually through reflux pipe 8.5 in water sample, water sample is aerated.

Due to blasting for high-purity helium or nitrogen, the volatile organic matter in water sample is set to fully enter gas phase, and with drum The high-purity helium or nitrogen entered, by the first connector 2 and sealed valve 4, enter in the 3rd trap, the 3rd trap pair Volatile organic matter in gas phase is adsorbed.

After the completion of purge and trap, thermal desorption detection is carried out.By complete absorption the first trap 5 and the 3rd trap from water Pulled down on sample collector, and the first trap 5 and the 3rd trap are contacted, two trap one end connection gas phase color of series winding Mass spectrograph is composed, the other end connects hot helium, carries out the thermal desorption detection of volatile organic matter.

In order to prevent float 8.2 from leaving sleeve pipe 8.1 by blow vent 8.3, the width of blow vent 8.3 is less than the float 8.2 thickness.

In order to ensure the sealing effectiveness of float, as shown in Fig. 2 the second connector 3 is shoulder hole, it is divided into for accommodating float Counterbore section 3.1 and internal diameter be less than counterbore section 3.1 linkage section 3.2.Sleeve pipe 8.1 is connected with counterbore section 3.1, outside float 8.2 Footpath is more than the internal diameter of linkage section 3.2.

When float 8.2 seals the second connector 3, blocked in counterbore section 3.1, and by linkage section 3.2.Float 8.2 enters Enter in counterbore section 3.1, you can complete the sealing of the second connector 3.

In order to ensure that float 8.2 smoothly enters counterbore section 3.2, the outer wall of float 8.2 is matched somebody with somebody with the inwall gap of sleeve pipe 8.1 Close, and float 8.2 is coaxially disposed with sleeve pipe 8.1.

Float 8.2 can steadily lift in sleeve pipe 8.1, accurate to enter counterbore section 3.2, while the float that gap coordinates 8.2 and sleeve pipe 8.1, make gap between the two be present, gas in sleeve pipe 8.1 can by float 8.2, when making water sample sampling, Gas in sampling container 1 can be discharged by the second connector 3.

In order to further improve the sealing effectiveness of float 8.2, the thickness of counterbore section 3.1 is identical with the thickness of float 8.2, sinks The internal diameter of hole section 3.1 is identical with the external diameter of float 8.2, float 8.2 is matched with counterbore section 3.1.

The float 8.2 and counterbore section 3.1 that match completely reduce space between the two, and increase float 8.2 and second connects The tightness degree sealed between interface 3, improve sealing effectiveness.

After declining in order to avoid liquid level, float is deviate from from sleeve pipe, is provided with the inwall of sleeve pipe 8.1 of the lower section of float 8.2 Stop that float 8.2 deviates from the locating part 8.4 of sleeve pipe 8.1.Locating part 8.4 is that limited block, spacing ring etc. are convex in the inwall of sleeve pipe 8.1 The structure risen, support and stop float 8.2, avoid falling on the bottom of sleeve pipe 8.1 under float 8.2 and deviate from.

In order to avoid influence of the volatile organic matter in air to testing result, the first trap 5 is connected with the second trapping Device 6.

The one end of first trap 5 connects collection container 1, other end connection air.Volatile organic matter in air can Contact with the first trap 5, and adsorbed by it.

Second trap 6 obstructs the first trap 5 with air, and the volatile organic matter in air is adsorbed, kept away Exempt from the volatile organic matter in air by the first trap 5, the volatile organic matter for ensureing to adsorb in the first trap 5 is all from Water sample, make testing result accurate.

First trap 5 and the second trap 6 and the second connector 3 can directly pass through dismountable connection side such as grafting Formula, make the first trap 5 and the second trap 6 be easy to pull down, be easy to carry out subsequent analysis to the first trap 5.

In order to avoid water sample is splash in collection container, deflector 7 is provided with sampling container 1, one end of deflector 7 and the One connector 2 is connected, and the other end is located at the bottom of sampling container 1.

Deflector 7 is obliquely installed, and plate face is alignd with the second connector 2, is entered by the first connector 2 in sampling container 1 Water sample, by the surface of deflector 7 drain, be sent to the bottom of sampling container 1, avoid water sample from splashing, ensure that the stabilization of water sample Property.

Claims (8)

1. a kind of water sampler, it is characterised in that including sampling container (1), the sampling container (1) is provided with for inputting The first connector (2) of water sample and the second connector (3) for discharging sampling container (1) interior gas,

First connector (2) is connected with sealed valve (4), and second connector (3) is connected with for adsorbing volatility The first trap (5) of organic matter,

Floating seal arrangement is installed, described floating seal arrangement includes and the second connector (2) in the sampling container (1) Connected sleeve pipe (8.1), and be used in sleeve pipe (8.1) by the float (8.2) of the second connector (3) closure,

Described sleeve pipe (8.1) side wall is provided with blow vent (8.3), and the blow vent (8.3) is connected with reflux pipe (8.5), described Reflux pipe (8.5) one end is located at the bottom of the sampling container (1).

2. water sampler according to claim 1, it is characterised in that the width of the blow vent (8.3) is less than described The thickness of float (8.2).

3. water sampler according to claim 1, it is characterised in that second connector (3) is shoulder hole, is divided into Counterbore section (3.1) and internal diameter for accommodating float are less than the linkage section (3.2) of counterbore section (3.1), and described sleeve pipe (8.1) is with sinking Hole section (3.1) is connected, and the external diameter of the float (8.2) is more than the internal diameter of linkage section (3.2).

4. water sampler according to claim 3, it is characterised in that the thickness and float of the counterbore section (3.1) (8.2) thickness is identical, and the internal diameter of the counterbore section (3.1) is identical with the external diameter of float (8.2).

5. the water sampler according to claim 3 or 4, it is characterised in that the outer wall and sleeve pipe of the float (8.2) (8.1) inwall gap coordinates.

6. water sampler according to claim 1, it is characterised in that in the sleeve pipe (8.1) below the float (8.2) The locating part (8.4) for stopping float (8.2) abjection sleeve pipe (8.1) is provided with wall.

7. water sampler according to claim 1, it is characterised in that first trap (5) is connected with second and caught Storage (6).

8. water sampler according to claim 1, it is characterised in that be provided with deflector in the sampling container (1) (7), described deflector (7) one end is connected with the first connector (2), and the other end is located at the bottom of sampling container (1).