CN210775403U - Gas sampling hand-held device and leakage point gas detection equipment - Google Patents

Abstract

The utility model provides a gas sampling handheld device and a leakage point gas detection device, wherein the gas sampling handheld device comprises a sampling conduit and a main cavity body; the inner surface of the sampling conduit is provided with a spiral groove; the gas inlet of the main cavity body is connected and communicated with the exhaust end of the sampling conduit, the main cavity body comprises a head part provided with the gas inlet, a tail part opposite to the head part, and a middle part connecting the head part and the tail part, wherein the head part of the main cavity body is provided with a dewatering filter membrane arranged opposite to the gas outlet, the head part and the middle part of the main cavity body are separated, a gas-liquid separation cavity is formed between the gas inlet and the dewatering filter membrane, the gas inlet and the dewatering filter membrane are exposed from the gas-liquid separation cavity, the side surface of the gas-liquid separation cavity is provided with absorption cotton, the; the detection apparatus comprises the gas sampling handset and an analyser. The gas sample is dried through multiple liquid removal processes, and can be used in rainy days or when liquid leakage media exist, so that the damage of equipment water inlet is avoided.

Description

Gas sampling hand-held device and leakage point gas detection equipment

Technical Field

The utility model relates to a gas leakage detection field, concretely relates to gas sampling handheld ware and leakage point gas detection equipment.

Background

Because the national regulation on environmental protection is increasingly strengthened, the Volatile Organic Compounds (VOCs) from chemical plants have high emission intensity, high concentration and multiple pollutant types, and belong to the major households causing pollution. Along with the enhancement of environmental awareness, more and more enterprises begin to perform regular leakage point detection work on sealing points in a factory area, and at present, the leakage point detection work is mainly performed manually on-site on various valves, flanges, movable joints, safety valves and the like on container pipelines in chemical engineering devices, clapboards, regulating valves and the like on instruments, sealing surfaces of bodies of static equipment bodies and accessories, sealing surfaces of pressure gauges, liquid level meters and the like, sealing pairs of continuous operation of movable equipment, sealing surfaces of the bodies and pipelines and other parts where VOCs gas leakage easily occurs, and the like.

But in the actual detection process, there are some problems in current check out test set, mainly reflect that the main mode of current liquid removal is to install the water removal filter membrane additional and remove water, and the main shortcoming of water removal filter membrane includes: 1. if the water amount sucked at one time is too large, the filter membrane cannot completely absorb the water and enters a gas analyzer to cause equipment damage; 2. the dewatering filter membrane has limited adsorption capacity, the use condition must be checked frequently and replaced regularly, and the use efficiency is low; 3. the dewatering filter membrane itself is designed for dewatering, lacks the function of removing to the liquid medium that leaks, if the on-the-spot measurement personnel do not see the liquid medium and inhale the analysis appearance, also can cause the damage of analysis appearance. Based on the problems existing at present, when the existing detection equipment is used for detecting leakage points, the detection must be carried out under the condition of fine weather, and if a small amount of liquid medium leaked from a detected sealing surface is not found in time, the liquid medium is directly sucked by a gas sampling handheld device and enters an analyzer of the detection equipment, so that the liquid inlet of the equipment is possibly damaged.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that traditional leakage point gas detection equipment can't use under the condition that rainwater weather perhaps has liquid leakage medium, the utility model provides a gas sampling handheld ware and leakage point gas detection equipment.

According to the utility model discloses a first aspect, the utility model provides a gas sampling handheld ware, include:

a sampling conduit having an air intake end and an air exhaust end, the sampling conduit having an inner surface provided with a helical groove;

the main cavity body, the air inlet of the main cavity body with the exhaust end of sampling pipe is connected and is linked together, the main cavity body is including being provided with the head of air inlet, with afterbody that the head is relative and connection the head with the middle part of afterbody, wherein, the head of the main cavity body have for the dewatering filter membrane that the air inlet set up, the dewatering filter membrane separates the head and the middle part of the main cavity body, the air inlet with be formed with the gas-liquid separation chamber between the dewatering filter membrane, the gas-liquid separation chamber exposes the air inlet and the dewatering filter membrane, the side in gas-liquid separation chamber is provided with the absorption cotton, the middle part of the main cavity body is provided with air exhaust device, the afterbody of the main cavity body is provided.

Optionally, the air extracting device comprises a turbine and an electric motor, and the turbine is connected with the electric motor through a transmission shaft.

Optionally, the turbine is disposed towards the water removal filter membrane, and the air extraction device is configured to generate a negative pressure between the water removal filter membrane and the turbine by rotation of the turbine.

Optionally, a support frame is arranged between the electric motor and the inner wall of the main cavity.

Optionally, the support frame includes a plurality of legs, and both ends of each leg are respectively fixed with the electric motor and the inner wall of the main cavity.

Optionally, the tail of the main cavity is frustum-shaped, the larger end of the tail is connected with the middle of the main cavity, and the exhaust port is located at the smaller end of the tail.

Optionally, the head and the middle of the main cavity are cylindrical and have equal diameters.

Optionally, a gas rectification structure is arranged in the tail portion of the main cavity body, and the gas rectification structure comprises a plurality of partition plates arranged in the tail portion of the main cavity body.

According to the utility model discloses a second aspect, the utility model provides a leakage point gas detection equipment, include any one technical scheme the gas sampling handheld ware and with the gas vent of gas sampling handheld ware is connected and the analysis appearance of intercommunication.

Optionally, the gas detection device further comprises a PDA in communication with the analyzer.

The utility model discloses a gas sampling handheld ware, including the sampling pipe and with the main cavity body of sampling pipe intercommunication. The sampling conduit is provided with an air inlet end and an air outlet end, and the inner surface of the sampling conduit is provided with a spiral groove; the air inlet of the main cavity body with the exhaust end of sampling pipe is connected and is linked together, the main cavity body is including being provided with the head of air inlet, with afterbody that the head is relative and connection the head with the middle part of afterbody, wherein, the head of the main cavity body have for the dewatering filter membrane that the air inlet set up, the dewatering filter membrane separates the head and the middle part of the main cavity body, the air inlet with be formed with the gas-liquid separation chamber between the dewatering filter membrane, the gas-liquid separation chamber exposes the air inlet and the dewatering filter membrane, the side in gas-liquid separation chamber is provided with the absorption cotton, the middle part of the main cavity body is provided with air exhaust device, the afterbody of the main cavity body is provided with the.

Utilize the utility model discloses a when gas sampling handheld ware samples, utilize the air exhaust device in the main cavity, gaseous entering sampling pipe becomes rotatory air current through the heliciform recess of sampling pipe internal surface, and the centrifugal force that produces during the rotation can throw away some probably liquid that exist in the sampling gas, thereby the deposit gets into the main cavity body at the recess bottom following current, the head of main cavity body is provided with the gas-liquid separation chamber, and the gas-liquid separation intracavity is provided with absorbs the cotton, can adsorb the liquid that flows into the main cavity body from the recess bottom, also can adsorb the liquid that is thrown away by centrifugal force behind the sampling pipe entering main cavity body to make the liquid in the sampling gas reduce, and then, the air current passes the water removal filter membrane, can further get rid of the liquid composition in the sampling gas.

It can be seen that, the utility model discloses a gas sampling handheld ware has multiple except that the liquid process, absorbs cotton and uses with the cooperation of dewatering filter membrane, not only helps reducing the moisture in the sampling gas, can also get rid of other liquid medium beyond the water to the sampling gas that obtains from the gas vent is difficult to damage check out test set. The gas sampling hand-held device can be used not only in sunny weather but also in rainwater weather, can also be used under the condition of sucking a small amount of liquid leakage medium, and is flexible and convenient to use.

The utility model discloses a leakage point gas detection equipment, including above-mentioned gas sampling handheld ware and analysis appearance, the sampling gas that the analysis appearance detected is through gas sampling handheld ware, and liquid content is low, therefore is difficult to intake water and damages, can use under various weather, and the flexibility is high to help increase of service life.

Drawings

Fig. 1 is a schematic structural diagram of a gas sampling handset according to an embodiment of the present invention.

Fig. 2a to 2C are schematic cross-sectional views taken along the line a-A, B-B, C-C in fig. 1, respectively.

Fig. 3 is an enlarged schematic view of a portion of structure D in fig. 1.

Description of reference numerals:

1-a sampling catheter; 2-absorbent cotton; 3-a turbine; 4-an electric motor; 5-dewatering filter membrane; 6-a transmission shaft; 7-a stilt; 8-gas rectification structure.

Detailed Description

In order to make the contents of the present invention more clear and understandable, the present invention is further described below with reference to the attached drawings of the specification. Of course, the invention is not limited to this specific embodiment, and general alternatives known to those skilled in the art are also covered by the scope of the invention. Secondly, the present invention has been described in detail by using schematic diagrams, but these schematic diagrams are only for convenience of describing the examples of the present invention in detail, and should not be taken as limitations of the present invention.

The following disclosure provides many different embodiments for implementing different features of the invention. Specific embodiments of components and arrangements are described below to simplify the present disclosure. Of course, these are merely examples and are not intended to limit the present invention. Spatial terms such as "below …", "below …", "below", "above" and the like are used for ease of describing the positional relationship of one element to another element as illustrated in the drawings, and shall encompass a variety of different orientations of the device in use or operation in addition to the orientation depicted in the drawings. The device may be otherwise oriented, such as rotated 90 degrees or at other orientations, and the spatially relative descriptors used herein interpreted accordingly. The singular forms "a", "an" and "the" include plural referents unless the content clearly dictates otherwise. The term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise.

As described in the background, in the case of rain weather or the presence of liquid leakage medium, the existing detection device may cause damage to the device due to water inflow by performing gas sampling analysis on a point to be detected. Therefore, the utility model provides a gaseous sampling handheld ware and leakage point gas detection equipment carries out multiple liquid that removes to the gas sample in sampling process, avoids equipment to intake and damages, can use under the condition that rainwater weather perhaps has liquid leakage medium.

The gas sampling handset and the leak gas detection apparatus according to an embodiment of the present invention will be described in detail with reference to fig. 1 to 3.

As shown in fig. 1, the structure of a gas sampling handset according to an embodiment of the present invention is shown. The gas sampling handset comprises a sampling tube 1 and a main chamber. The sampling conduit 1 has an inlet end from which the aspirated gas enters the interior of the sampling conduit 1 and an outlet end from which it enters the main chamber.

As shown in fig. 3, an enlarged schematic view of the partial structure D of fig. 1 is shown. Referring to fig. 1 and 3, a helical groove is arranged inside the sampling conduit 1, gas is changed into rotating gas flow through the helical groove, liquid possibly carried in the gas flow, such as leaked liquid medium and moisture, also rotate together, and centrifugal force generated by rotation deposits the liquid so as to flow into the main cavity along the groove.

The air inlet of the main cavity body is connected and communicated with the exhaust end of the sampling conduit 1, and the main cavity body comprises a head part provided with the air inlet, a tail part opposite to the head part, and a middle part connecting the head part and the tail part. As shown in fig. 2a, a cross-sectional view along a-a of fig. 1 is shown. Referring to figures 1 and 2a, wherein the head of the main chamber has a water scavenging filter 5 positioned relative to the air inlet, the water scavenging filter 5 separating the head and middle of the main chamber. A gas-liquid separation cavity is formed between the gas inlet and the dewatering filter membrane 5, the gas inlet and the dewatering filter membrane 5 are exposed out of the gas-liquid separation cavity, and the side face of the gas-liquid separation cavity is provided with the absorbent cotton 2, so that gas flow entering the gas-liquid separation cavity from the gas inlet can pass through the inner space of the absorbent cotton 2 and passes through the dewatering filter membrane 5 to leave.

The gas flow passes through the spiral groove in the sampling conduit 1, the liquid separated and deposited by centrifugal force flows downstream to the gas-liquid separation cavity at the head of the main cavity along the groove, and is absorbed by the absorbent cotton 2, and the leaked liquid medium and most of water are removed. The gas flow in the gas-liquid separation chamber may continue to rotate, so that a part of the liquid which may not be separated is directly thrown onto the absorbent cotton and removed by the absorbent cotton 2. The inner surface of the absorbent cotton 2 may be provided in a circular, spiral or other regular or irregular shape.

Further, as the gas stream passes through the water removal filter membrane 5, a portion of the water that may remain is removed by the water removal filter membrane 5. Through the liquid removing process, even if the operation is carried out in rainy days or under the condition that the leaked liquid medium exists, the storage amount and the water content of the leaked medium of the gas sample can be reduced to a lower level, and the equipment cannot be damaged.

As shown in fig. 2B, a cross-sectional view along B-B of fig. 1 is shown. Referring to fig. 1 and 2b, an air extractor is disposed in the middle of the main chamber for forming negative pressure in the main chamber to suck air. In the present embodiment, the air extraction device comprises an electric motor 4 and a turbine 3, and the electric motor 4 and the turbine 3 are connected by a transmission shaft 6. The turbine 3 may be arranged towards the water scavenging filter membrane 5, the air extraction device being configured to generate a negative pressure between the water scavenging filter membrane 5 and the turbine 3 by rotation of the turbine 3.

A support frame is arranged between the electric motor 4 and the inner wall of the main cavity body. In this embodiment, the support frame includes a plurality of legs, and both ends of each leg are respectively fixed with the electric motor 4 and the inner wall of the main cavity. Optionally, the front end and the rear end of the electric motor 4 may be respectively connected and fixed to the main cavity by three legs. In the embodiment, the electric motor 4 is adopted to drive the turbine 3, so that the electric energy conversion rate can be effectively improved. The air extracting device can also adopt other arrangement modes, such as arranging an air extracting pump, arranging a peristaltic pump and the like, and forming negative pressure to suck air.

As shown in fig. 2C, a cross-sectional view along the direction C-C of fig. 1 is shown. Referring to fig. 1 and 2c, the head and the middle of the main cavity are arranged in a cylindrical shape with the same diameter, the tail of the main cavity is gradually reduced to be in a frustum shape, the larger end of the tail is connected with the middle of the main cavity, and the exhaust port of the main cavity is located at the smaller end of the tail. The frustum shape afterbody of the main cavity body can set up gaseous fairing structure 8, and gaseous fairing structure 8 can be gaseous to the advection with turbulent flow shaping including setting up the polylith baffle in the frustum shape afterbody of the main cavity body for gaseous sample gets into the analysis appearance (not shown) comparatively steadily from the gas vent of the main cavity body. The head, middle and tail portions of the main cavity may also be arranged in a triangular prism shape, a quadrangular prism shape, a pentagonal prism shape or other regular or irregular shapes.

In this embodiment, the frustum-shaped tail portion is in a shape of a circular truncated cone. Optionally, the length of the frustum-shaped tail part is 1-2 times of the diameter of the bottom of the frustum. The baffle can set up to the dull and stereotyped of axial symmetry, including diaphragm and riser. The symmetry axis of the transverse plate is arranged along a generatrix of a virtual cone coaxial with the circular truncated cone, and the symmetry axis of the vertical plate is arranged along a direction parallel to the symmetry axis of the circular truncated cone. The number of the transverse plates and the vertical plates can be set into a plurality of blocks, the symmetrical shafts of the transverse plates are located on a first longitudinal section of the circular truncated cone, the symmetrical shafts of the vertical plates are located on a second longitudinal section of the circular truncated cone, and the first longitudinal section is perpendicular to the second longitudinal section. Optionally, the plurality of transverse plates are symmetrical along the first longitudinal cross section, and the plurality of vertical plates are symmetrical along the second longitudinal cross section. The cone-shaped tail part is divided into a plurality of small cavities by the aid of the transverse plates and the vertical plates, the cross-sectional area of a channel of each small cavity is gradually reduced along the outflow direction of the sampled gas, and the cross-sectional areas of the channels of two adjacent small cavities are also gradually reduced, so that turbulent gas can be gradually rectified into advection gas when passing through the small cavities, and a gas sample can stably enter the analyzer to be analyzed.

For the case that the frustum-shaped tail part is in the shape of a circular truncated cone, in another embodiment, the partition plate can be arranged as an axisymmetric flat plate, including a horizontal plate and a vertical plate, and the symmetry axis of the partition plate is arranged along the generatrix of a virtual cone coaxial with the circular truncated cone. The number of the transverse plates and the vertical plates can be set to be multiple, the symmetrical shafts of the transverse plates are located on a first longitudinal section of the circular truncated cone, the symmetrical shafts of the vertical plates are located on a second longitudinal section of the circular truncated cone, and the first longitudinal section is perpendicular to the second longitudinal section. Optionally, the plurality of transverse plates are symmetrical along the first longitudinal cross section, and the plurality of vertical plates are symmetrical along the second longitudinal cross section.

In another embodiment, the partition board can be a flat board with axial symmetry, including a horizontal board and a vertical board, and the symmetry axis is arranged along the direction parallel to the symmetry axis of the circular truncated cone. The number of the transverse plates and the vertical plates can be set into a plurality of blocks. The symmetry axes of the transverse plates are located on a first longitudinal section of the circular truncated cone, the symmetry axes of the vertical plates are located on a second longitudinal section of the circular truncated cone, and the first longitudinal section is perpendicular to the second longitudinal section. Optionally, the plurality of transverse plates are symmetrical along the first longitudinal cross section, and the plurality of vertical plates are symmetrical along the second longitudinal cross section.

For the case that the frustum-shaped tail part is in a frustum shape, the arrangement mode of the partition plates is correspondingly deformed, for example, the partition plates are not arranged to be axisymmetric, and are arranged in a mode that the geometric lines such as the central lines are parallel to the symmetry axis of the frustum; or the first longitudinal section and the second longitudinal section are not perpendicular to each other, and the like, and the invention also belongs to the protection scope of the invention. Even, except the diaphragm that sets up in groups and the riser that sets up in groups of foretell, can also set up another series of baffle of at least one group as required, can cut apart more little cavitys with frustum shape afterbody to obtain the gaseous rectification effect that accords with the demand.

The frustum-shaped tail part can also be arranged into a non-circular truncated cone shape, such as a triangular truncated cone shape, a quadrangular truncated cone shape, a pentagonal truncated cone shape or other types of regular or irregular regular frustum-shaped or deformed frustum-shaped shapes. Above-mentioned baffle setting mode of adaptation round platform shape cavity is through doing corresponding adjustment deformation to length and width, figure, the interval of baffle to be applicable to the corresponding variety of non-round platform shape afterbody, also should belong to within the scope of protection of the utility model.

In this embodiment, the external dimension of the main cavity body sets up to handheld, and sampling pipe 1 and main cavity body threaded connection absorb cotton 2 detachably and set up in the head of the main cavity body, and dewatering filter membrane 5 also can set up to detachable. The sampling catheter 1 and the main cavity body can be made of metal, plastic and other materials. Optionally, the sampling catheter 1 and the main cavity are both in a straight cylinder shape and can be arranged coaxially. Alternatively, the cross-sectional area of the gas passage of the sampling conduit 1 is set to 1/6-1/3 of the cross-sectional area of the gas passage of the main chamber. The length of the sampling catheter 1 can be set to 10cm-20 cm.

The sampling conduit 1 and the main cavity may be arranged in other manners, for example, the sampling conduit 1 may be arranged in a ring shape, a spiral shape, or other regular or irregular shapes and combinations of one to more of them, and the main cavity may be designed as a rectangular body, a polygonal column, or other regular or irregular shapes and combinations of one to more of them; the main cavity can also provide at least part of the section as a flexible material cavity; the sampling conduit 1 and the main chamber may also communicate through a plurality of communication ports.

The utility model also provides a leakage point gas detection equipment, including above-mentioned sampling handheld ware and the analysis appearance of being connected and the intercommunication with the gas vent of the main cavity body. The analyzer may be an on-line gas chromatograph or the like. Optionally, the detection device may also include a PDA. PDA (personal Digital assistant), such as a palm top computer, a smart phone, a tablet computer, a handheld game console, etc. Utilize the utility model discloses a leakage point gas detection equipment can use the sampling handheld ware in possible leakage point collection gas sample, and gas sample is sent into the analysis appearance and is carried out the analysis afterwards, and the analysis appearance can be carried analysis result for PDA.

The working principle of the present invention will be described below by taking a leakage point gas detection device as an example. During operation, the electric motor 4 is started to drive the turbine 3 to work, negative pressure is formed in the main cavity body, and gas sampling is carried out on possible leakage points at each position. Gaseous sampling pipe 1 along sampling handheld ware inhales the main cavity body, and the inside of sampling pipe 1 is provided with the heliciform recess, and gaseous becoming rotatory air current when passing through, the liquid that it probably carried also rotates together, utilizes rotatory centrifugal force to deposit in the recess to following current to the main cavity body. The head of the main chamber is provided with absorbent cotton 2, and the leaked liquid medium and most of the moisture which may be present are absorbed by the absorbent cotton 2. Further, the head of the main chamber is provided with a water removal filter membrane 5, and a small amount of water left is removed by the water removal filter membrane 5 when the air flow passes through the same. The dried gas flow finally passes through a gas rectification structure 8 at the tail of the main chamber to rectify the turbulence into advection and then sent to an analyzer (not shown) for analysis, and the analysis result is sent to a PDA (not shown).

According to the above, the utility model discloses a gaseous inspiratory heliciform recess of sampling pipe 1 becomes rotatory air current, utilizes centrifugal force to go into recess and following current with liquid deposition to absorbing cotton 2, detach the liquid medium of most moisture and the leakage that probably exists, and the remaining partial moisture that the air current probably carried is detached when passing through dewatering filter membrane 5, utilizes gaseous rectification structure 8 to become the advection gas with turbulent gas rectification at last, sends into follow-up analysis appearance and detects. Utilize the utility model discloses a multiple liquid process that removes of gas sampling handheld ware even under rainwater weather and the condition such as existence leakage liquid medium, also can carry out leakage point detection work, is unlikely to cause the analysis appearance feed liquor to damage.

The above description is only for the description of some embodiments of the present invention, and not for any limitation of the scope of the present invention, and any modification and modification made by those skilled in the art according to the above disclosure are all included in the protection scope of the claims.

Claims (10)

1. A gas sampling handset, comprising:

a sampling conduit having an air intake end and an air exhaust end, the sampling conduit having an inner surface provided with a helical groove;

the main cavity body, the air inlet of the main cavity body with the exhaust end of sampling pipe is connected and is linked together, the main cavity body is including being provided with the head of air inlet, with afterbody that the head is relative and connection the head with the middle part of afterbody, wherein, the head of the main cavity body have for the dewatering filter membrane that the air inlet set up, the dewatering filter membrane separates the head and the middle part of the main cavity body, the air inlet with be formed with the gas-liquid separation chamber between the dewatering filter membrane, the gas-liquid separation chamber exposes the air inlet and the dewatering filter membrane, the side in gas-liquid separation chamber is provided with the absorption cotton, the middle part of the main cavity body is provided with air exhaust device, the afterbody of the main cavity body is provided.

2. A gas sampling handset as claimed in claim 1 wherein the suction means comprises a turbine and an electric motor, the turbine being connected to the electric motor by a drive shaft.

3. The gas sampling handset of claim 2, wherein the turbine is disposed towards the water scavenging filter, the gas evacuation device being configured to generate a negative pressure between the water scavenging filter and the turbine by rotation of the turbine.

4. A gas sampling handset as claimed in claim 2 wherein a support frame is provided between the electric motor and the inner wall of the main chamber.

5. The gas sampling handset of claim 4, wherein the support frame comprises a plurality of legs, each leg having ends secured to the electric motor and an inner wall of the main chamber, respectively.

6. The gas sampling handset of claim 1, wherein the tail portion of the main housing is frustoconical, the larger end of the tail portion being connected to a middle portion of the main housing, and the exhaust port being located at the smaller end of the tail portion.

7. The gas sampling handset of claim 1, wherein the head and middle portions of the main chamber are cylindrical and of equal diameter.

8. The gas sampling handset of claim 6, wherein the tail portion of the main cavity has a gas rectification structure disposed therein, the gas rectification structure comprising a plurality of baffles disposed within the tail portion of the main cavity.

9. A leak gas testing apparatus comprising a gas sampling handset as claimed in any one of claims 1 to 8 and an analyser connected to and in communication with the gas outlet of the gas sampling handset.

10. The leak point gas detection apparatus of claim 9, further comprising a PDA in communication with the analyzer.

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