CN211740764U

CN211740764U - Atmosphere sampling instrument

Info

Publication number: CN211740764U
Application number: CN201922214353.2U
Authority: CN
Inventors: 赵扬; 郭曜嘉
Original assignee: Sanhe Zhengan Inspection Co ltd
Current assignee: Sanhe Zhengan Inspection Co ltd
Priority date: 2019-12-11
Filing date: 2019-12-11
Publication date: 2020-10-23
Anticipated expiration: 2029-12-11

Abstract

The utility model provides an atmospheric sampling appearance, it mainly includes sample thief body, drying cylinder and prevents suck-back subassembly. Wherein the drying cylinder is connected to the gas collection pipeline of the sampler body, and the inner cavity of the drying cylinder is filled with allochroic silica gel. The anti-suck-back component is arranged on a gas collecting pipeline behind the drying cylinder and comprises an anti-suck-back pipe, a rectangular cavity is formed in the anti-suck-back pipe, an anti-suck-back plate allowing air flow to pass through is arranged in the cavity, and a sealing plate is pivotally connected with the anti-suck-back plate. When the airflow flows along the collecting direction, the sealing plate can rotate relative to the anti-suck-back plate to form a structure allowing the airflow to flow through the anti-suck-back assembly, and when the airflow flows along the opposite collecting direction, the sealing plate is abutted against and attached to the anti-suck-back plate to form blocking for the reverse flow of the gas in the collector. The drying cylinder can effectively dry the collected gas, the anti-reverse suction pipe can prevent the reverse suction of the collected sample gas, and the accuracy of the analysis result of the sampled gas is jointly guaranteed by the anti-reverse suction pipe and the anti-reverse suction pipe.

Description

Atmosphere sampling instrument

Technical Field

The utility model relates to an empty gas detection surveys equipment technical field, in particular to atmospheric sampling appearance.

Background

Environmental sampling often involves the use of an atmospheric sampling instrument, which is an instrument or device that collects atmospheric contaminants or contaminated atmosphere. Under the great environment of humidity, the interior inevitable water droplet that can condense of gas acquisition pipeline of atmosphere sampling appearance, and some harmful gas are dissolved in water, will appear the result deviation when carrying out the analysis to the sampling gas like this, and the suck-back phenomenon can take place sometimes for the gas in the sampling bottle of gathering simultaneously, also can lead to the deviation of final analysis result. And if the drying device is installed too complicated, the maintenance difficulty of the sampling instrument is increased.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing an atmosphere sampling appearance to can effectively carry out the drying to the sampling gas, can effectively prevent that the sampling bottle from taking place the suck-back phenomenon simultaneously.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

an atmospheric sampling instrument, comprising a sampler body, the atmospheric sampling instrument further comprising:

the drying cylinder is detachably connected to the gas collecting pipeline of the sampler body, is transparent and is internally provided with a cavity, and granular allochroic silica gel is loaded in the cavity so as to dry the gas introduced into the gas collecting pipeline;

the anti-suck-back component is arranged on a gas collecting pipeline of the sampler body and is positioned behind the gas collecting pipeline where the drying cylinder is positioned, the anti-suck-back component comprises an anti-suck-back pipe, a rectangular cavity is formed in the anti-suck-back pipe, an anti-suck-back plate allowing only airflow to pass through and a sealing plate in pivot connection with the anti-suck-back plate are arranged in the cavity;

when the airflow flows along the collecting direction, the sealing plate can rotate relative to the anti-suck-back plate to form a structure allowing the airflow to flow through the anti-suck-back assembly, and when the airflow flows along the opposite collecting direction, the sealing plate is tightly abutted and attached to the anti-suck-back plate to form blocking for the reverse flow of the liquid in the collector.

Furthermore, a conical connecting joint with an accommodating hole formed inside is connected to the gas collecting pipeline, and the drying cylinder is inserted into the accommodating hole of the connecting joint.

Furthermore, a lug is formed on the drying cylinder; corresponding to the lug, forming a first sliding groove and a second sliding groove which are arranged at intervals on the inner wall of the connecting joint along the axial direction of the accommodating hole, wherein the first sliding groove penetrates through the opening end of the accommodating hole, a connecting sliding groove arranged along the circumferential direction of the drying cylinder is arranged between the first sliding groove and the second sliding groove, and the connecting sliding groove is communicated with the first sliding groove and the second sliding groove; the drying cylinder is inserted into the containing hole due to the embedding of the convex block in the first sliding groove, and is clamped in the containing hole due to the fact that the convex block enters the second sliding groove through the connecting sliding groove.

Furthermore, a sealing rubber ring is sleeved at the joint of the drying cylinder and the connecting joint.

Furthermore, the allochroic silicagel filled in the drying cylinder accounts for 1/2-3/4 of the volume of the drying cylinder.

Furthermore, the two ends of the anti-falling suction pipe are both connected with conical reducing joints, and the large-diameter end of each reducing joint is connected with the anti-falling suction pipe.

Furthermore, a plurality of air holes for air flow to pass through are formed on the anti-reverse suction plate, the anti-reverse suction plate is bonded on the upper surface of the cavity, and the air flow collection direction is arranged at an included angle.

Furthermore, a rotating shaft is arranged on one of the anti-suck-back plate and the sealing plate, and a rotating shaft hole for the rotating shaft to be in pivot connection is arranged on the other of the anti-suck-back plate and the sealing plate relative to the rotating shaft.

Compared with the prior art, the utility model discloses following advantage has:

(1) atmospheric sampling appearance, through the drying cylinder who sets up with prevent the suck-back subassembly, can effectively carry out drying process to the sample gas of gathering to can effectively prevent the emergence of suck-back, thereby improve the accuracy to the analysis result of sample gas, and better result of use has.

(2) The drying cylinder is arranged on the air inlet collecting pipeline, so that water drops condensed in the air inlet collecting pipeline can be effectively prevented from influencing an analysis result.

(3) The drying cylinder is convenient to install and disassemble, so that the maintenance difficulty can be reduced.

(4) The joint of the drying cylinder and the connector is sealed by a rubber ring, so that the leakage of collected gas can be effectively prevented, the drying effect of the collected gas is improved, and the gas entering the collecting pipeline is dry.

(5) The volume of the allochroic silica gel occupying the drying cylinder is 1/2-3/4, so that the collected gas is dried more fully.

(6) The anti-suck-back plate is bonded on the cavity in the anti-suck-back pipe and is easy to manufacture.

(7) The anti-suck-back plate is connected with the sealing plate shaft, so that air inlet can be ensured, and suck-back can be prevented.

(8) The two ends of the anti-falling suction pipe are conical, and the anti-falling suction pipe is connected with a gas collection pipeline of the atmosphere sampling instrument more firmly.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a schematic structural diagram of an atmospheric sampling instrument according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a connection joint according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a drying cylinder according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a suck-back prevention assembly according to an embodiment of the present invention;

FIG. 5 is a schematic structural view of the anti-backflow pipe according to the embodiment of the present invention;

FIG. 6 is a cross-sectional view of the anti-backflow pipe according to the embodiment of the present invention;

fig. 7 is a schematic structural view of an anti-suck back plate according to an embodiment of the present invention;

fig. 8 is a schematic structural view of a sealing plate according to an embodiment of the present invention;

description of reference numerals:

1-sampler body;

2-connecting joint, 21-first chute, 22-second chute and 23-connecting chute;

3-drying cylinder, 31-lug, 32-gas collection port;

4-anti-suck-back component, 41-anti-suck-back pipe, 42-reducer union, 411-cavity, 412-anti-suck-back plate, 413-sealing plate, 4121-vent hole, 4122 mounting column, 4123-rotating shaft hole and 4131-rotating shaft;

5-sampling bottle.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "back", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

The embodiment relates to an atmosphere sampling instrument which is used for sampling and retaining atmosphere. The atmosphere sampling instrument is characterized in that a drying cylinder and a backflow prevention suction pipe which are convenient to disassemble are additionally arranged on a gas collecting pipeline, so that the influence of condensed water on collected sample gas and the influence of a backflow phenomenon on retained gas are eliminated, and the accuracy of an analysis result of the retained sample gas is ensured.

Based on the above design concept, an exemplary structure of the atmosphere sampling instrument of this embodiment is as shown in fig. 1, and at first is a drying cylinder 3, can dismantle and connect on the gas collection pipeline of sample thief body 1, and drying cylinder 3 is transparent, inside is formed with the cavity, holds the graininess color-changing silica gel in the cavity for carry out the drying to the gas that lets in the gas collection pipeline. When the granular silica gel absorbs moisture, the color of the silica gel in the granular silica gel is changed, and the color change degree of the silica gel in the granular silica gel can be observed through the transparent drying cylinder 3 so as to determine whether the drying cylinder 3 needs to be replaced.

It should be noted that, for convenience of description, the gas collection pipeline in this embodiment is a pipeline disposed on a side where the atmosphere sampler is connected to the drying cylinder, and the gas collection pipeline is a pipeline disposed on a side opposite to the drying cylinder, that is, a side where the atmosphere sampler is connected to the suck-back prevention assembly.

Next, as shown in fig. 1, the suck back prevention assembly 4 is inserted into the gas collection pipe of the sampler body 1 and is located behind the gas collection pipe where the above-mentioned drying cylinder 3 is located. The suck back prevention assembly 4 includes a suck back prevention pipe 41, a rectangular cavity 411 is formed in the suck back prevention pipe 41, and a suck back prevention plate 412 allowing only airflow to pass through and a sealing plate 413 pivotally connected to the suck back prevention plate 412 are bonded in the cavity 411. When the airflow flows along the collecting direction, the sealing plate 413 can rotate relative to the suck-back prevention plate 412 under the pushing of the airflow, so as to allow the airflow to flow through the suck-back prevention assembly 4, and when the airflow flows along the collecting direction in the opposite direction, the sealing plate 413 abuts against and is attached to the suck-back prevention plate 412, so as to form a blocking for the reverse flow of the gas in the collector. The connection mode of the suck-back prevention component 4 and the gas collection pipeline is not limited to insertion connection, and other fixed connection modes such as adhesion can be selected. The connection between the suck-back prevention plate 412 and the cavity 411 is not limited to adhesion, and other fixing connection methods such as welding may be used.

Furthermore, as shown in fig. 1, a conical connection joint 2 with a containing hole formed therein is connected to the gas collection pipe, and a drying cylinder 3 is inserted into the containing hole of the connection joint. The conical joint is beneficial to more fastening connection, and meanwhile, the drying cylinder 3 is connected in a plug-in mounting manner, so that the drying cylinder is more simple and convenient to disassemble, and the maintenance difficulty is reduced.

Then, as shown in fig. 3, a projection 31 is formed on the drying cylinder 3, corresponding to the projection 31, and with reference to fig. 2, a first sliding groove 21 and a second sliding groove 22 are formed on the inner wall of the connecting joint 2 at intervals along the axial direction of the accommodating hole, the first sliding groove 21 penetrates through the opening end of the accommodating hole, a connecting sliding groove 23 is formed between the first sliding groove 21 and the second sliding groove 22 and arranged along the circumferential direction of the drying cylinder, and the connecting sliding groove 23 is communicated with both the first sliding groove 21 and the second sliding groove 22; the drying cylinder 3 is inserted into the accommodating hole due to the insertion of the projection 31 into the first sliding groove 21, and is clamped in the accommodating hole due to the projection 21 entering the second sliding groove 22 through the connecting sliding groove 23. The drying cylinder 3 is in a suspended state, and the protrusion 31 is tightly caught in the second sliding groove 22 by gravity.

In order to improve the gas tightness of junction, in this embodiment, the cover is equipped with the sealing rubber circle in the junction of drying cylinder 3 and attach fitting 2 to make the gas that gets into gaseous collection pipeline must be by the gaseous collection mouth 32 entering and through the dry gas of drying cylinder 3, let gather gaseous dry more abundant, can not condense out the water droplet in gaseous collection pipeline, influence the composition of gathering gas. The allochroic silica gel filled in the drying cylinder accounts for 1/2-3/4 of the volume of the drying cylinder.

Meanwhile, as shown in fig. 4, the two ends of the anti-falling suction pipe 41 are connected with conical reducing joints 42, and the large-diameter end of the reducing joint 42 is connected with the anti-falling suction pipe 41. The conical small-diameter end of the variable joint can be slightly smaller than a gas collecting pipeline of an atmosphere sampling instrument, so that the variable joint is easier to insert, and the tapered diameter can ensure that the insertion is more tight.

Referring to fig. 6 and 7, a plurality of vent holes 4121 are formed in the suck-back prevention plate 412 for airflow to pass through, and the suck-back prevention plate 412 is adhered to the upper surface of the cavity 411 and forms an included angle with the airflow collecting direction. When no gas flows in the collecting direction, due to the gravity, a sealing plate 413 mentioned below abuts against and fits the suck back preventing plate 412 to prevent the suck back of the remaining gas.

Finally, referring to fig. 7 and 8, a rotating shaft 4123 is provided on one of the suck back prevention plate 412 and the sealing plate 413, and a rotating shaft hole 4131 for pivotally connecting the rotating shaft 4123 is provided on the other of the suck back prevention plate 412 and the sealing plate 413, so that a pivotal connection can be formed therebetween, so that the sealing plate 413 can rotate relative to the suck back prevention plate 412 to form an air inlet passage during sampling.

This embodiment is when using, and gaseous by 3 entering of drying cylinder, with in 3 drying cylinder get into the gaseous collection pipeline of sampling appearance after absorbing moisture by granular allochroic silica gel granule, then remain in sampling bottle 5 at last via putting the suck-back subassembly. The drying cylinder 3 and the put-suck-back component 4 jointly ensure the accuracy of the final detection and analysis result of the retained gas. Meanwhile, the drying cylinder 3 is transparent, so that the color change condition of the drying agent in the cylinder, namely the color-changing silica gel particles, can be visually observed, and the drying agent is convenient to replace in time. The connection mode of the plug-in connection and the clamping connection is convenient to disassemble and simple to maintain.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An atmospheric sampling instrument, comprising a sampler body (1), characterized in that it further comprises:

the drying cylinder (3) is detachably connected to the gas collecting pipeline of the sampler body (1), the drying cylinder (3) is transparent, a cavity is formed inside the drying cylinder, and granular allochroic silica gel is loaded in the cavity to dry the gas introduced into the gas collecting pipeline;

the anti-suck-back component (4) is arranged on a gas collection pipeline of the sampler body (1) and is positioned behind the gas collection pipeline where the drying cylinder (3) is positioned, the anti-suck-back component (4) comprises an anti-suck-back pipe (41), a rectangular cavity (411) is formed in the anti-suck-back pipe (41), and an anti-suck-back plate (412) allowing only airflow to pass through and a sealing plate (413) in pivotal connection with the anti-suck-back plate (412) are arranged in the cavity (411);

when the airflow flows along the collection direction, the sealing plate (413) can rotate relative to the suck-back prevention plate (412), so that circulation of the airflow flowing through the suck-back prevention assembly (4) is allowed, and when the airflow flows along the opposite collection direction, the sealing plate (413) is abutted against and attached to the suck-back prevention plate (412), so that blocking of reverse flow of the gas in the collector is formed.

2. The atmospheric sampling instrument of claim 1, wherein: the gas collecting pipeline is connected with a conical connecting joint (2) with an accommodating hole formed inside, and the drying cylinder (3) is inserted into the accommodating hole of the connecting joint (2).

3. The atmospheric sampling instrument of claim 2, wherein: a lug (31) is formed on the drying cylinder (3); corresponding to the bump (31), forming a first sliding groove (21) and a second sliding groove (22) which are arranged at intervals on the inner wall of the connecting joint (2) along the axial direction of the accommodating hole, wherein the first sliding groove (21) penetrates through the opening end of the accommodating hole, a connecting sliding groove (23) which is arranged along the circumferential direction of the drying cylinder (3) is arranged between the first sliding groove (21) and the second sliding groove (22), and the connecting sliding groove (23) is communicated with the first sliding groove (21) and the second sliding groove (22); the drying cylinder (3) is inserted into the accommodating hole due to the embedding of the convex block (31) in the first sliding groove (21), and is clamped in the accommodating hole due to the fact that the convex block (31) enters the second sliding groove through the connecting sliding groove (23).

4. The atmospheric sampling instrument of claim 3, wherein: and a sealing rubber ring is sleeved at the joint of the drying cylinder (3) and the connecting joint (2).

5. The atmospheric sampling instrument of claim 1, wherein: the allochroic silicagel filled in the drying cylinder (3) accounts for 1/2-3/4 of the volume of the drying cylinder.

6. The atmospheric sampling instrument of claim 1, wherein: the two ends of the anti-falling suction pipe (41) are connected with conical reducing joints (42), and the large-diameter end of each reducing joint (42) is connected with the anti-falling suction pipe (41).

7. The atmospheric sampling instrument of any one of claims 1-6, wherein: a plurality of vent holes (4121) for air flow to pass through are formed in the anti-suck-back plate (412), and the anti-suck-back plate (412) is bonded on the upper surface of the cavity (411) and forms an included angle with the air flow collecting direction.

8. The atmospheric sampling instrument of claim 7, wherein: one of the suck-back preventing plate (412) and the sealing plate (413) is provided with a rotating shaft (4131), and the other of the suck-back preventing plate and the sealing plate is provided with a rotating shaft hole (4123) for the rotating shaft to be in pivot connection with relative to the rotating shaft (4131).