CN207798497U - A kind of sampling apparatus - Google Patents

Abstract

The utility model discloses a kind of sampling apparatuses, including sampling pipe, internal that there is the inner cavity extended along its length, the both ends open of the sampling pipe to be respectively formed sample inlet and sample outlet that the inner cavity is flowed in and out for sample；Whirlwind generator is set in outside the sampling pipe；Air inlet and air outlet are respectively formed on the lateral wall and madial wall of the whirlwind generator, the whirlwind generator is used to be formed around the whirlwind for being located at outside the sampling pipe and being flowed towards the sample inlet direction by the sample outlet through the air outlet.Since the generation direction of cyclone gas is opposite with the direction that sample enters, it is possible to reduce the mixing of sample and cyclone gas, so as to improve the sample purity for entering detection device；In addition, the setting of sampling pipe can effectively be separated cyclone gas and the sample of sucking, ensure the degree of purity of sucking sample, to improve sampling efficiency.

Description

A kind of sampling apparatus

Technical field

The utility model is related to safety inspection fields, and in particular to a kind of sampling apparatus.

Background technology

Fluorescent quenching detect explosive or other similar in field of optical detection, be usually directly sucked in by air pump Mode, so that sample is drawn into detector by suction chamber, pass through spectrum detection instrument or fluorescent quenching etc. detect device carry out sample Product examine is surveyed, to be differentiated to sample.

Chinese patent literature CN104535379A discloses a kind of sampling apparatus, including gas curtain air guiding member, and is mounted on gas Wind guide chamber on curtain air guiding member bottom opening；Offer inclined air duct on the side wall of gas curtain air guiding member, gas curtain air guiding member it is outer Side offers the inflation entrance being connected to inclination air duct；Extraneous wind enters through inflating entrance in inclined air duct, is led in gas curtain Whirlwind is formed in the endoporus of wind body, whirlwind enters in wind guide chamber from top to bottom；The open top of gas curtain air guiding member as sample into Mouthful, the bottom opening of wind guide chamber is as sample outlet, under the suction function inside whirlwind, sample is sucked from sample inlet and is revolved It moves downward in the inner cavity of wind and constantly, last sampled outlet discharge, into subsequent detection device, completion sampled Journey.

But in the sampling apparatus of above structure, flowing to for the flow direction of whirlwind and sample is identical, and sample is also in whirlwind It being flowed in chamber, inevitable sample is in direct contact with whirlwind, and the part wind in whirlwind can be discharged with sample together sampled outlet, into Enter into detection device, causes the wind for the sample adulteration whirlwind taken to cause purity not high, influence subsequent detection properties of sample Detection accuracy.

Utility model content

Therefore, the technical problem to be solved by the utility model is to overcome sampling apparatus in the prior art collected Sample purity is not high, leads to the problem that subsequently the detection accuracy to sample is low.

For this purpose, the utility model provides a kind of sampling apparatus, including

Sampling pipe, it is internal that there is the inner cavity extended along its length, the both ends open of sampling pipe to be respectively formed for sample Product flow in and out the sample inlet and sample outlet of inner cavity；

Whirlwind generator, is set in outside sampling pipe；It is respectively formed with air inlet on the lateral wall and madial wall of whirlwind generator Mouthful and air outlet, whirlwind generator be used to be formed around being located at outside sampling pipe and by sample outlet towards sample inlet side through air outlet To the whirlwind of flowing.

It is further preferred that further including the diversion pipe being set in outside sampling pipe, installation is formed between diversion pipe and sampling pipe Cavity；

Whirlwind generator is mounted in installation cavity body, and the air inlet being connected to air inlet is offered on the side wall of diversion pipe, Air outlet is communicated in installation cavity.

It is further preferred that having ring-shaped step of the step surface towards sample outlet on the internal face of diversion pipe；

There is radially outwardly extending first outer, the first outer to be mounted on ring-shaped step in the outside wall surface of sampling pipe On；

Whirlwind generator is clamped between the first outer and step surface.

It is further preferred that along the radial direction of sampling pipe, shape between the outside wall surface of whirlwind generator and the internal face of diversion pipe Air duct is circularized, air inlet is opened on the side wall of the diversion pipe where annular passage.

It is further preferred that whirlwind generator includes annular disk；Along the radial direction of annular disk, ecto-entad is opened in annular disk Towards at least one inclination air duct on the surface of step surface side, the both sides for accordingly tilting air duct form arc convex；

It is tilting in air duct on the preceding line direction of wind, the interior sidewall surface of arc convex is tangential on the periphery of the endoporus of annular disk Circle；The outer openings in air duct are tilted as air inlet, tilt the inside opening in air duct as air outlet.

It is further preferred that sampling pipe includes the first pipe with the first outer, and it is plugged on the first outer and installs The second pipe on diversion pipe internal face；The outlet of second pipe is as sample outlet, and the import of the first pipe is as sample inlet；

The outlet of second pipe is stretched out outside diversion pipe, and detection device is adapted to attach to.

It is further preferred that the first outer has annular protrusion, the second pipe direction on a side surface of ring-shaped step There is the annular slot suitable for annular protrusion grafting on one side surface of the first outer；And/or

The outside wall surface screw-thread fit of second pipe is on the internal face of diversion pipe.

It is further preferred that being additionally provided with filter core in the inner cavity of the second pipe.

It is further preferred that further including the negative pressure device being arranged outside the sample outlet of sampling pipe, being used for will be in sampling pipe Sample extraction.

It is further preferred that end of the diversion pipe at the sample inlet of sampling pipe is equipped with sleeve, the inner cavity of sleeve In the flaring structure by installation cavity towards extraneous amplification, sample inlet is located in sleeve；And/or heating is arranged on diversion pipe Device and/or insulating layer.

Technical solution provided by the utility model, has the following advantages that：

1. sampling apparatus provided by the utility model, including sampling pipe, internal interior with extending along its length Chamber, the both ends open of sampling pipe are respectively formed sample inlet and sample outlet that inner cavity is flowed in and out for sample；Whirlwind occurs Device is set in outside sampling pipe；Air inlet and air outlet, whirlwind hair are respectively formed on the lateral wall and madial wall of whirlwind generator Raw device is used to be formed around the whirlwind for being located at outside sampling pipe and being flowed towards sample inlet direction by sample outlet through air outlet.

The sampling apparatus of this structure, the whirlwind that whirlwind generator generates through air outlet by forming from sample outlet to sampling Inlet flow, since under the action of whirlwind, centre position forms negative pressure, to by extraneous sample sucking sampling pipe, revolve Air generator can provide motion-promotion force for sucking sample；Due to cyclone gas direction that direction and sample enter occurs on the contrary, The mixing that sample and cyclone gas can be reduced, so as to improve the sample purity for entering detection device；In addition, sampling pipe Being arranged can effectively be separated the air-flow that cyclone gas and sample suck, and ensured the degree of purity of sucking sample, reduced whirlwind The mixing of gas and sample further ensures that the purity of detected sample, to improve sampling efficiency.

2. sampling apparatus provided by the utility model further includes the diversion pipe being set in outside sampling pipe, diversion pipe and sampling Installation cavity is formed between pipe；Whirlwind generator is mounted in installation cavity body, is offered on the side wall of diversion pipe and is connected with air inlet Logical air inlet, air outlet are communicated in installation cavity.

The sampling apparatus of this structure, diversion pipe are equipped with whirlwind generator, ensure whirlwind can in diversion pipe and It is formed in cavity between sampling pipe, to the channel that offer whirlwind flows through, increases the negative pressure of sampling pipe position, be more convenient for It will be in the sampled import sucking sampling pipe of sample.

3. sampling apparatus provided by the utility model, there is ring of the step surface towards sample outlet on the internal face of diversion pipe Shape step；There is radially outwardly extending first outer, the first outer to be mounted on ring-shaped step in the outside wall surface of sampling pipe On；Whirlwind generator is clamped between the first outer and step surface.Ensure the compact installation between structure entirety.

4. sampling apparatus provided by the utility model, along the radial direction of sampling pipe, the outside wall surface and diversion pipe of whirlwind generator Internal face between form annular passage, air inlet is opened on the side wall of the diversion pipe where annular passage.Whirlwind generator Including annular disk；Along the radial direction of annular disk, ecto-entad is opened in annular disk towards at least one on the surface of step surface side A inclination air duct, the both sides for accordingly tilting air duct form arc convex；On the preceding line direction along wind, the inner wall of arc convex Face is tangential on the periphery circle of the endoporus of annular disk；The outer openings in air duct are tilted as air inlet, tilt the inside opening in air duct As air outlet.

The sampling apparatus of this structure, gas by air inlet along the inclination air duct that annular passage enters whirlwind generator, by It is tangent in the internal face for the arc convex for tilting air duct both sides and the endoporus periphery circle of annular disk so that wind is after tilting air duct Realize the function of forming whirlwind.

5. sampling apparatus provided by the utility model, sampling pipe includes the first pipe with the first outer, and is plugged on the The second pipe on one outer and on diversion pipe internal face；The outlet of second pipe is as sample outlet, the import of the first pipe As sample inlet；The outlet of second pipe is stretched out outside diversion pipe, and detection device is adapted to attach to.First outer is backwards to ring-shaped step A side surface on there is annular protrusion, the second pipe is towards having suitable for annular protrusion grafting on a side surface of the first outer Annular slot；And/or second pipe outside wall surface screw-thread fit on the internal face of diversion pipe.

The sampling apparatus of this structure, annular protrusion carry out limit cooperation with annular slot, ensure the reliable of sampling pipe structure Property, sampling pipe are assemblied in by the second pipe in diversion pipe, do not influence the flow direction of the whirlwind formed between the first pipe and diversion pipe.

6. sampling apparatus provided by the utility model, filter core is additionally provided in the inner cavity of the second pipe.Stop the object of bulky grain Matter enters inside detection device, avoids causing to block.

7. sampling apparatus provided by the utility model further includes the negative pressure device being arranged outside the sample outlet of sampling pipe, For extracting the sample in sampling pipe out, the equipment of negative pressure device is accelerated sample and is entered in subsequent detection device, further carries High detection collection efficiency increases the capacity gauge of sampling apparatus.

8. sampling apparatus provided by the utility model, end of the diversion pipe at the sample inlet of sampling pipe is equipped with set Cylinder, the inner cavity of sleeve are in the flaring structure by installation cavity towards extraneous amplification, and sample inlet is located in sleeve；And/or water conservancy diversion Winding having heaters and/or insulating layer on pipe.Runner heater carries out auxiliary heating outside diversion pipe, increases the entirety of whirlwind Temperature blows to be correspondingly improved by the whirlwind temperature on the surface of sample thief, makes sample be easier to volatilize, further increases inspection Survey precision and detection efficiency；Being equipped with for sleeve forms whirlwind conducive to simulation.

Description of the drawings

It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art Specific implementation mode or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art Under the premise of labour, other drawings may also be obtained based on these drawings.

Fig. 1 is the sampling apparatus structural schematic diagram provided in embodiment 1；

Fig. 2 is the sampling apparatus cross-sectional view provided in embodiment 1；

Fig. 3 is the whirlwind generator architecture schematic diagram provided in embodiment 1；

Reference sign：

11- sample inlets；12- sample outlets；13- first is managed；The first outers 131-；14- second is managed；

2- whirlwind generators；21- air inlets；22- air outlets；23- tilts air duct；24- arc convex；

3- diversion pipes；31- air inlets；

4- filter cores；

5- sleeves；

6- heaters.

Specific implementation mode

The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described Embodiment is the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, originally The every other embodiment that field those of ordinary skill is obtained without making creative work, belongs to this practicality Novel protected range.

It is in the description of the present invention, it should be noted that term "center", "upper", "lower", "left", "right", " perpendicular Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only The utility model and simplifying describes for ease of description, do not indicate or imply the indicated device or element must have it is specific Orientation, with specific azimuth configuration and operation, therefore should not be understood as limiting the present invention.In addition, term " the One ", " second ", " third " are used for description purposes only, and are not understood to indicate or imply relative importance.

In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally Connection；It can be mechanical connection, can also be electrical connection；Can be directly connected, can also indirectly connected through an intermediary, It can be the connection inside two elements.For the ordinary skill in the art, it can understand above-mentioned art with concrete condition The concrete meaning of language in the present invention.

In addition, as long as technical characteristic involved in the utility model different embodiments disclosed below is each other Not constituting conflict can be combined with each other.

Embodiment 1

Sampling apparatus provided in this embodiment, as depicted in figs. 1 and 2, including：Sampling pipe 1, whirlwind generator 22 and water conservancy diversion Pipe 33.Wherein, diversion pipe 3 is set in outside sampling pipe, and installation cavity is formed between diversion pipe 3 and sampling pipe；2 sets of whirlwind generator It is located at outside sampling pipe and in installation cavity body.

The inside of sampling pipe has the inner cavity that extends along its length, both ends open be respectively formed flowed into for sample and Flow out the sample inlet 11 and sample outlet 12 of inner cavity；It is respectively formed with air inlet on the lateral wall and madial wall of whirlwind generator 2 Mouthfuls 21 and air outlet 22, whirlwind generator 2 is used to be formed around being located at outside sampling pipe and by 12 direction of sample outlet through air outlet 22 The whirlwind of 11 direction of sample inlet flowing；The air inlet 31 being connected to air inlet 21, air outlet are offered on the side wall of diversion pipe 3 22 are communicated in installation cavity.Diversion pipe 3 is equipped with whirlwind generator 2, ensures that whirlwind can be in diversion pipe 3 and sampling pipe Between cavity in formed, provide the channel that flows through to whirlwind, reduce whirlwind and external influence and increasing in whirlwind inner cavity is adopted The negative pressure of sample pipe position, convenient for extraneous sample to be easier to suck in sampling pipe.Wherein, sample is solid, gas Or volatile particle, it is specifically volatile particle in the present embodiment.

In the present embodiment, there is ring-shaped step of the step surface towards sample outlet 12 on the internal face of diversion pipe 3；Sampling There is radially outwardly extending first outer 131, the first outer 131 are mounted in the outside wall surface of pipe on ring-shaped step；Rotation Air generator 2 is clamped between the first outer 131 and step surface.The compact installation being further ensured that between structure entirety.

In the present embodiment, between the radial direction of sampling pipe, the outside wall surface and the internal face of diversion pipe 3 of whirlwind generator 2 Annular passage is formed, air inlet 31 is opened on the side wall of the diversion pipe 3 where annular passage.

As shown in figure 3, whirlwind generator 2 includes annular disk；Along the radial direction of annular disk, ecto-entad is opened in annular disk court Multiple inclination air ducts 23 on the surface of step surface side accordingly form an arc between two neighboring inclination air duct 23 Protrusion 24.It is tilting in air duct 23 on the preceding line direction of wind, the interior sidewall surface of arc convex 24 is tangential on the endoporus of annular disk Justify periphery；The outer openings in air duct 23 are tilted as air inlet 21, tilt the inside opening in air duct 23 as air outlet 22.Gas By air inlet 31 along the inclination air duct 23 that annular passage enters whirlwind generator, due to tilting the arc convex of 23 both sides of air duct 24 internal face and the endoporus periphery circle of annular disk are tangent so that wind realizes the function of forming whirlwind after tilting air duct 23； Meanwhile enter the gas of annular passage, due to tilt 23 both sides of air duct arc convex 24 and arc convex 24 it is interior The endoporus periphery of wall surface and annular disk circle is tangent, and advantage is provided for what whirlwind was formed.The table of the present embodiment annular disc Six inclination air ducts 23 are uniformly provided on face, each angle of inclination for tilting air duct 23 is identical.Be conducive to stabilization and form whirlwind.

As shown in Fig. 2, sampling pipe includes the first pipe 13 with the first outer 131, and it is plugged on the first outer 131 simultaneously The second pipe 14 on 3 internal face of diversion pipe；Make as sample outlet 12, the import of the first pipe 13 outlet of second pipe 14 For sample inlet 11；The outlet of second pipe 14 is stretched out outside diversion pipe 3, and detection device is adapted to attach to.

Specifically, the first outer 131 has annular protrusion, 14 direction of the second pipe on a side surface of ring-shaped step There is the annular slot suitable for annular protrusion grafting on one side surface of the first outer 131；Meanwhile second pipe 14 outside wall surface spiral shell Line coordinates on the internal face of diversion pipe 3.Annular protrusion carries out limit cooperation with annular slot, ensures reliability of structure, together When the first pipe 13 and the inner diameter hole of the second pipe 14 be same internal diameter, be assemblied in jointly in diversion pipe 3, do not influence the first pipe 13 with The flow direction of the whirlwind formed between diversion pipe 3.

As shown in Figure 1, being additionally provided with filter core 4 in the inner cavity of the second pipe 14.Filter core 4 can stop that the substance of bulky grain enters Inside detection device, avoid causing to block.In the present embodiment, limit is fixed by gasket and the first pipe 13 in filter core 4, ensures The stability of sampling apparatus.

In the present embodiment, it is additionally provided with negative pressure device outside the sample outlet of sampling pipe 12, be used for the sample in sampling pipe Product are extracted out.Accelerate sample to enter in subsequent detection device, further increases detection collection efficiency, increase the collection of sampling apparatus Ability.For example, negative pressure device is negative pressure pump.

In the present embodiment, end of the diversion pipe 3 at the sample inlet 11 of sampling pipe is equipped with sleeve 5, sleeve 5 Inner cavity is in that the flaring structure towards extraneous amplification, sample inlet 11 are located in sleeve 5 by installation cavity；Meanwhile on diversion pipe 3 around Equipped with heater 6, in general, being also arranged with insulating layer in 6 periphery of heater.Runner heater 6 carries out auxiliary outside diversion pipe 3 and adds Heat increases the bulk temperature of whirlwind, is blown to by the whirlwind temperature on the surface of sample thief to be correspondingly improved, sample is made to be easier Volatilization, it is easier to be inhaled into sampling pipe, further improve accuracy of detection and detection efficiency；Insulating layer can be to sampling apparatus outside Portion is thermally shielded, and prevents external scald.In the present embodiment, 5 internal face of sleeve is circular conical surface, is circular conical surface close to determinand one end Rounded ends corresponding position.Sleeve 5 is fixed with diversion pipe 3 by screw-thread fit.

The use process of sampling apparatus in the present embodiment is：

Gas enters air-flow by air inlet 31, and air-flow is put aside inside annular passage, and is passed through along several inclination air ducts 23 Whirlwind generator 2 forms the whirlwind towards 11 direction of sample inlet between diversion pipe 3 and the first pipe 13, and by sample inlet Flow out diversion pipe 3 at 11 ends, and under the collective effect by negative pressure device and cyclone gas outside sample outlet 12, sample is by sampling Import 11 is flowed to 12 direction of sample outlet, and the filter core 4 by being arranged between the first pipe 13 and the second pipe 14 is to bulky grain Sample is isolated, and is finally flowed into the detection device being subsequently arranged, and so far, is completed to sample collection.

Sampling apparatus provided in this embodiment, the whirlwind that whirlwind generator 2 generates through air outlet 22 by forming by adopting Sample outlet 12 is flowed to sample inlet 11, and due to revolving wind action, the centre position of whirlwind forms negative pressure, to suck the sample into Into in sampling pipe, whirlwind generator 2 can provide motion-promotion force for sucking sample；Due to cyclone gas generation direction and sample into The direction entered is opposite, it is possible to reduce the mixing of sample and cyclone gas, so as to improve the sample purity for entering detection device； In addition, the setting of sampling pipe can effectively be separated the air-flow that cyclone gas and sample suck, ensure the pure of sucking sample Cleanliness reduces the mixing of cyclone gas and sample, the purity of further detected sample, to improve sampling efficiency.

Embodiment 2

The present embodiment provides a kind of sampling apparatus, the sampling apparatus compared with being provided in embodiment 1, existing difference spy Sign is,

Heater 6 is set to 31 end of air inlet, will enter whirlwind generator 2 gas directly heat, ensure into The gas for entering air inlet 31 is heated, and to accelerate the volatilization of sample, improves detection efficiency.

As further deformation, heater 6 can also be arranged on the wall surface of the first pipe 13, can be simultaneously to outside The sample of cyclone gas and 13 internal circulation of the first pipe is heated.

Embodiment 3

The present embodiment provides a kind of sampling apparatuses to deposit compared with the sampling apparatus provided in embodiment 1 or embodiment 2 Difference lies in：

The shape of sleeve 5 can also be a part for spherical shape, and the internal face of 5 internal cavity of sleeve is arc surface, ensures gas Internal portion can form stable cyclonic air flow.

As the deformation of 5 mounting means of the present embodiment middle sleeve, sleeve 5 can also be integrated design with diversion pipe 3.

Embodiment 4

The present embodiment provides a kind of sampling apparatus, the sampling provided to any of embodiment 3 embodiment with embodiment 1 Device is compared, it is existing difference lies in：

It can be not provided with negative pressure device outside the sample outlet 12 of sampling pipe, can only be incited somebody to action by the way that whirlwind generator 2 is arranged still Sample sucks in sampling pipe, and enters in subsequent detection device.

Embodiment 5

The present embodiment provides a kind of sampling apparatus, the sampling provided with any of embodiment 1 to embodiment 4 embodiment Device is compared, it is existing difference lies in：

The first pipe 13 and the second pipe 14 of sampling pipe can also be not provided with arc convex 24 and arc groove, only by wall surface into Row limitation positioning compresses the first pipe 13 after ensureing the second pipe 14 by being coordinated with diversion pipe 3.

Embodiment 6

The present embodiment provides a kind of sampling apparatus, the sampling provided to any of embodiment 5 embodiment with embodiment 1 Device is compared, it is existing difference lies in：

Filter core 4 can be arranged in 11 one end of sample inlet of the second pipe 14, be carried out to sample while sucking sample Screen selects, and to ensure the purity of the sample sampled, improves the precision of detection.

As further deformation, the first pipe 13 and the second pipe 14 of sampling apparatus can be wholely set, and only need to ensure to adopt Sampling device reliably install.

Embodiment 7

The present embodiment provides a kind of sampling apparatus, the sampling provided to any of embodiment 6 embodiment with embodiment 1 Device is compared, it is existing difference lies in：

The inclination air duct 23 of whirlwind generator 2 can be spaced any angle setting, only need to ensure to form corresponding whirlwind i.e. It can.

As further deformation, the number for tilting air duct 23 can be one, two, three etc., tilt air duct 23 The number of setting is more, and the stability for forming whirlwind is also relatively higher.Specific setting number, depending on actual use situation.

Embodiment 8

The present embodiment provides a kind of sampling apparatus, the sampling provided to any of embodiment 7 embodiment with embodiment 1 Device is compared, it is existing difference lies in：

Whirlwind generator 2 can be wholely set with sampling pipe, and sampling pipe is with diversion pipe 3 by being positioned close to sample outlet The fixing device of 12 one end is directly attached, above-mentioned sampling apparatus, without to the first outer 131 of sampling pipe and step Face is configured.

Obviously, above-described embodiment is only intended to clearly illustrate the citing of work, and does not limit the embodiments.For For those of ordinary skill in the art, other various forms of variations or change can also be made on the basis of the above description It is dynamic.There is no necessity and possibility to exhaust all the enbodiments.And obvious variation extended from this or change Among moving still in the protection domain of innovation and creation.

Claims (10)

1. a kind of sampling apparatus, which is characterized in that including

Sampling pipe, it is internal that there is the inner cavity extended along its length, the both ends open of the sampling pipe to be respectively formed for sample Product flow in and out the sample inlet (11) and sample outlet (12) of the inner cavity；

Whirlwind generator (2), is set in outside the sampling pipe；On the lateral wall and madial wall of the whirlwind generator (2) respectively It is formed with air inlet (21) and air outlet (22), the whirlwind generator (2) is used to be formed around being located at through the air outlet (22) The whirlwind flowed outside the sampling pipe and towards the sample inlet (11) direction by the sample outlet (12).

2. sampling apparatus according to claim 1, which is characterized in that further include the diversion pipe being set in outside the sampling pipe (3), installation cavity is formed between the diversion pipe (3) and the sampling pipe；

The whirlwind generator (2) be mounted on the installation cavity body in, offered on the side wall of the diversion pipe (3) with it is described into The air inlet (31) of air port (21) connection, the air outlet (22) are communicated in the installation cavity.

3. sampling apparatus according to claim 2, which is characterized in that have step on the internal face of the diversion pipe (3) Facing towards the ring-shaped step of the sample outlet (12)；

There is radially outwardly extending first outer (131), first outer (131) in the outside wall surface of the sampling pipe On the ring-shaped step；

The whirlwind generator (2) is clamped between first outer (131) and the step surface.

4. sampling apparatus according to claim 3, which is characterized in that along the radial direction of the sampling pipe, the whirlwind occurs Annular passage is formed between the outside wall surface and the internal face of the diversion pipe (3) of device (2), the air inlet (31) is opened in described On the side wall of the diversion pipe (3) where annular passage.

5. sampling apparatus according to claim 3 or 4, which is characterized in that the whirlwind generator (2) includes annular disk； Along the radial direction of the annular disk, ecto-entad is opened in the annular disk towards at least one on the surface of the step surface side A inclination air duct (23), accordingly, the both sides for tilting air duct (23) form arc convex (24)；

On the preceding line direction for tilting air duct (23) interior wind, the interior sidewall surface of the arc convex (24) is tangential on the ring Justify the periphery of the endoporus of shape disk；The outer openings for tilting air duct (23) are as the air inlet (21), the inclination air duct (23) inside opening is as the air outlet (22).

6. sampling apparatus according to claim 3 or 4, which is characterized in that the sampling pipe includes having outside described first The first pipe (13) along (131), and be plugged on first outer (131) and be mounted on the diversion pipe (3) internal face Second pipe (14)；Make as the sample outlet (12), the import of first pipe (13) outlet of second pipe (14) For the sample inlet (11)；

The diversion pipe (3) is stretched out outside in the outlet of second pipe (14), is adapted to attach to detection device.

7. sampling apparatus according to claim 6, which is characterized in that first outer (131) is backwards to the annular table There is annular protrusion, second pipe (14) is towards having on a side surface of first outer (131) on one side surface of rank There is the annular slot suitable for the annular protrusion grafting；And/or

The outside wall surface screw-thread fit of second pipe (14) is on the internal face of the diversion pipe (3).

8. sampling apparatus according to claim 6, which is characterized in that be additionally provided with filter in the inner cavity of second pipe (14) Core (4).

9. according to the sampling apparatus described in any one of claim 1-4, which is characterized in that further include being arranged in the sampling pipe The outer negative pressure device of sample outlet (12), for the sample in the sampling pipe to be extracted out.

10. according to any one of the claim 2-4 sampling apparatuses, which is characterized in that the diversion pipe (3) is adopted close to described End at the sample inlet (11) of sample pipe is equipped with sleeve (5), and the inner cavity of the sleeve (5) is in by the installation cavity direction The flaring structure of external world's amplification, the sample inlet (11) are located in the sleeve (5)；And/or

Winding having heaters (6) and/or insulating layer on the diversion pipe (3).