CN214876797U

CN214876797U - Waste gas sampling and storing device for gas chromatography detection

Info

Publication number: CN214876797U
Application number: CN202120791272.3U
Authority: CN
Inventors: 王舒敏; 盛勇; 黎中令
Original assignee: Nanjing Nuowei Testing Technology Co ltd
Current assignee: Nanjing Nuowei Testing Technology Co ltd
Priority date: 2021-04-16
Filing date: 2021-04-16
Publication date: 2021-11-26
Anticipated expiration: 2031-04-16

Abstract

The utility model discloses a waste gas sample save set for gas chromatography detects, including the air guide hose with be located air guide hose both ends and rather than the sampling device and the collection bag of intercommunication, be provided with gas inlet and outlet on the collection bag, gas inlet and outlet passes through the stop valve and is connected with the air guide hose, the stop valve is used for controlling the break-make between gas inlet and outlet and the air guide hose. The sampling device comprises a sampling tube which is sleeved at the end part of the air guide hose and is in interference fit with the air guide hose, and one end of the sampling tube, which is far away from the air guide hose, is detachably connected with a first filtering component. The sampling cover that one end extended the sampling tube is still cup jointed outside the sampling tube, is provided with the convulsions subassembly of extraction outside air in the sampling cover, and the convulsions subassembly includes can dismantle the first support of being connected and the air exhauster that is located first support with the sampling cover, and the air intake department of air exhauster is provided with the second filter screen that is located first support. Can carry out quick sampling to waste gas, and can filter the large-scale casing in the waste gas when the sample, improve the precision that the gaseous phase detected.

Description

Waste gas sampling and storing device for gas chromatography detection

Technical Field

The utility model relates to an exhaust-gas detection technical field, in particular to a waste gas sample save set for gas chromatography detects.

Background

The environmental protection detection mainly comprises water quality detection and air detection. In the factory production process, polluted waste water and waste gas can be generated, and the purpose of monitoring factory pollution discharge is realized by adopting a water sample and a gas sample and detecting and analyzing the discharge proportion of harmful substances in the water sample and the gas sample through a chemical test. Gas detection works by moving the exhaust gas collected on site to an "expensive" laboratory analyzer, a gas chromatograph (perhaps mass spectrometer), for comprehensive analytical testing, awaiting detailed analytical reporting of gas species, concentration ranges. Waste gas sample is preserved and is adopted direct sampling usually, to the collection of the detection waste gas of mill's tail gas to store the waste gas of gathering in the gas storage bag, once detect often can be in the waste gas of the quick different positions of the collection in same place, and save in the gas storage bag with convenient transportation. However, since the environment of the collection site is complex, large particles in the air can affect the detection effect, and how to quickly filter the large particles before the waste gas enters the gas storage bag so as to improve the accuracy of gas phase detection becomes a problem to be solved.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects, the utility model aims to provide a waste gas sampling and storing device for gas chromatography detection can carry out quick sampling to waste gas, and can filter the large-scale casing in the waste gas when taking a sample, improves the precision of gas phase detection.

In order to achieve the above purpose, the utility model discloses a technical scheme is: a waste gas sample save set for gas chromatography detects which characterized in that: including the air guide hose and be located air guide hose both ends and rather than the sampling device and the collection bag of intercommunication, it imports and exports to be provided with gas on the collection bag, gas imports and exports and is connected with the air guide hose through the stop valve, the stop valve is used for controlling the break-make between gaseous exit and the air guide hose, sampling device is including cup jointing the gas guide hose tip and rather than interference fit's sampling tube, the one end that the air guide hose was kept away from to the sampling tube can be dismantled and be connected with first filter assembly, the sampling tube has still cup jointed the sample cover that one end extends the sampling tube outward, be provided with the convulsions subassembly of extraction outside air in the sample cover, the convulsions subassembly includes the air exhauster that can dismantle the first support of being connected with the sample cover and be located first support, the air inlet department of air exhauster is provided with the second filter screen that is located first support.

The beneficial effects of the utility model reside in that: the air draft assembly collects the external waste gas from the sampling cover, and the external waste gas enters the collecting bag through the sampling tube and the air guide hose. After the waste gas is collected by the collecting bag, the gas inlet and the gas outlet are blocked by the medium valve, so that the collecting bag is convenient to transport. And before the waste gas is collected like collecting the bag, through second filter screen and the dual filtration of first filter component, reduce the large-scale granule in the waste gas, avoid influencing gas chromatography and detect. The second filter screen and the first filter assembly are convenient to disassemble and clean. The whole sampling and storing device is convenient to assemble and disassemble quickly and can be assembled and used according to actual needs.

Further say, first filter assembly includes the frame and is located the first filter screen of frame, the inner wall threaded connection of frame and sampling tube, the quick assembly disassembly of the frame of being convenient for, the inner wall of sampling tube inwards extends to have can support the first spacing bulge loop that leans on with the frame, and first spacing bulge loop extends towards the sampling tube axis for inject the frame and extend into the distance in the sampling tube.

Further, the second filter screen is a stainless steel filter screen, and the first filter screen is glass wool embedded in the frame. Double filtration, filtration precision is different, filters the large-scale granule in the waste gas.

Further, the sample cover is the stereoplasm injection molding of loudspeaker form, the little circle end of sample cover and the outer wall threaded connection of sampling tube, the outer wall of sampling tube outwards extends to have the spacing bulge loop of second that can support against with the sample cover, and the displacement of sample cover can be injectd to the spacing bulge loop of second, first support passes through the big circle end of bolt fastening at the sample cover.

Further, the sampling tube is an integrally formed hard injection molding piece, the sampling tube comprises a sampling section and a transmission section which are communicated with each other, the inner diameter of the sampling section is larger than that of the transmission section, the air guide hose is inserted into the transmission section, and the sampling section is connected with the first filtering assembly and the air draft assembly. The sampling section and the transmission section have different inner diameters, so that the connection of the air guide hose, the first filtering assembly and the air draft assembly is greatly facilitated.

Further, be provided with the handheld pole that makes things convenient for to hand on the sampling tube, but handheld pole is the telescopic link, takes a sample through the fixed sampling tube of handheld pole, and handheld pole is the telescopic link, the waste gas of the not co-altitude of the sample of being convenient for.

Further, the stop valve comprises a mouthpiece with an upper opening and a lower opening, the lower end of the mouthpiece is connected with the gas inlet and the gas outlet, the side wall of the mouthpiece is provided with a gas inlet pipe communicated with the mouthpiece, the end part of the sampling tube is inserted into the gas inlet pipe, the mouthpiece is inserted into the upper opening and provided with a plug capable of moving up and down along the mouthpiece, and the plug can block an inlet communicated with the gas inlet pipe. When the plug blocks the inlet communicated with the mouthpiece and the air inlet pipe, the collecting bag is disconnected with the outside air at the moment, so that the collecting bag is convenient to transport and store.

Further, the plug is an elastic part and is in interference connection with the mouthpiece, a third limiting convex ring extends inwards from the inner wall of the mouthpiece, and the third limiting convex ring is located at the lower end of an inlet where the mouthpiece is communicated with the air inlet pipe.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is an enlarged view of FIG. 1 at A;

FIG. 3 is an enlarged view of FIG. 1 at B;

fig. 4 is a structural view of a collecting bag in an embodiment of the present invention.

In the figure:

1. an air guide hose; 2. a collection bag; 3. a stop valve; 31. a mouthpiece; 32. an air inlet pipe; 33. a plug; 34. a third limit convex ring; 4. a sampling tube; 41. a first limit convex ring; 42. a second limit convex ring; 5. a first filter assembly; 51. a frame; 52. a first filter screen; 6. a sampling hood; 71. a first bracket; 72. an exhaust fan; 73. a second filter screen; 8. the rod is held in the hand.

Detailed Description

The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so as to enable those skilled in the art to more easily understand the advantages and features of the present invention, and thereby define the scope of the invention more clearly and clearly.

Examples

Referring to the attached fig. 1-4, the waste gas sampling and storing device for gas chromatography detection comprises an air guide hose 1, and a sampling device and a collecting bag 2 which are positioned at two ends of the air guide hose 1 and communicated with the air guide hose. The collecting bag 2 is provided with a gas inlet and outlet, the gas inlet and outlet is connected with the gas guide hose 1 through a stop valve 3, and the stop valve 3 is used for controlling the on-off between the gas inlet and outlet and the gas guide hose 1. The stop valve 3 comprises a mouthpiece 31 with an upper opening and a lower opening, the mouthpiece 31 is welded on the collecting bag 2 by ultrasonic welding, and the lower end of the mouthpiece 31 is connected with the gas inlet and outlet. The side wall of the mouthpiece 31 is provided with an air inlet pipe 32 communicated with the mouthpiece 31, the end part of the sampling pipe 4 is inserted in the air inlet pipe 32, the mouthpiece 31 is inserted from the upper end opening and is provided with a plug 33 capable of moving up and down along the mouthpiece, and the plug 33 can plug the inlet communicated with the mouthpiece 31 and the air inlet pipe 32. When the plug 33 blocks the inlet of the mouthpiece 31 and the air inlet tube 32, the collection bag 2 is disconnected from the outside air at this time, which is convenient for transportation and storage.

The plug 33 is an elastic member and is in interference connection with the mouthpiece 31, a third limiting convex ring 34 extends inwards from the inner wall of the mouthpiece 31, and the third limiting convex ring 34 is located at the lower end of an inlet where the mouthpiece 31 and the air inlet pipe 32 are communicated. The mouthpiece 31 and the air inlet tube 32 are integrally molded, and the air in the collecting bag 2 enters and exits from the air inlet tube 32.

Sampling device is including cup jointing at air guide hose 1 tip and rather than interference fit's sampling tube 4, the one end that air guide hose 1 was kept away from to sampling tube 4 can be dismantled and be connected with first filter assembly 5, sampling tube 4 has still cup jointed one end outward and has extended sampling tube 4's sample cover 6, be provided with the convulsions subassembly of extraction outside air in the sample cover 6, the convulsions subassembly includes can dismantle the first support 71 of being connected and the air exhauster 72 that is located first support 71 with sample cover 6, the air intake department of air exhauster 72 is provided with the second filter screen 73 that is located first support 71.

The first filter assembly 5 comprises a frame 51 and a first filter screen 52 positioned in the frame 51, the frame 51 is in threaded connection with the inner wall of the sampling tube 4, so as to facilitate quick assembly and disassembly of the frame 51, the inner wall of the sampling tube 4 extends inwards to form a first limiting convex ring 41 which can be abutted against the frame 51, and the first limiting convex ring 41 extends towards the axis of the sampling tube 4 and is used for limiting the distance that the frame 51 extends into the sampling tube 4. The second screen 73 is a stainless steel screen and the first screen 52 is a glass wool embedded in the frame 51. Double filtration, filtration precision is different, filters the large-scale granule in the waste gas.

Sample cover 6 is the stereoplasm injection molding of loudspeaker form, and the little circle end of sample cover 6 and the outer wall threaded connection of sampling tube 4, the outer wall of sampling tube 4 outwards extend have can with sample cover 6 support the spacing bulge loop 42 of second that leans on, the displacement of sample cover 6 can be injectd to the spacing bulge loop 42 of second, first support 71 passes through the bolt fastening and holds at the big circle of sample cover 6.

The convulsions subassembly is collected outside waste gas from sample hood 6, through sampling tube 4 and air guide hose 1 get into in collecting bag 2. After the collecting bag 2 collects the waste gas, the gas inlet and the gas outlet are blocked by the medium valve, so that the collecting bag 2 is convenient to transport. And before the waste gas is collected like collecting bag 2, through the double filtration of second filter screen 73 and first filter component 5, reduce the large-scale granule in the waste gas, avoid influencing gas chromatography and detect. The second filter and the first filter assembly 5 are easy to disassemble and clean. The whole sampling and storing device is convenient to assemble and disassemble quickly and can be assembled and used according to actual needs.

Sampling tube 4 is integrated into one piece's stereoplasm injection molding, and sampling tube 4 is greater than the transmission section including mutual intercommunication sampling section and transmission section, the internal diameter of sampling section, and air guide hose 1 pegs graft in the transmission section, and the sampling section is connected with first filtering component 5 and convulsions subassembly. The sampling section and the transmission section have different inner diameters, so that the connection of the air guide hose 1, the first filtering component 5 and the air draft component is greatly facilitated.

Be provided with the handheld pole 8 that makes things convenient for to hand on the sampling tube 4, handheld pole 8 is scalable pole, takes a sample through the fixed sampling tube 4 of handheld pole 8, and handheld pole 8 is the telescopic link, the not co-altitude waste gas of the sample of being convenient for.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, so as not to limit the protection scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered in the protection scope of the present invention.

Claims

1. A waste gas sample save set for gas chromatography detects which characterized in that: comprises an air guide hose (1), a sampling device and a collection bag (2), wherein the sampling device and the collection bag are positioned at two ends of the air guide hose (1) and communicated with the air guide hose (1), the collection bag (2) is provided with a gas inlet and outlet, the gas inlet and outlet is connected with the air guide hose (1) through a stop valve (3), the stop valve (3) is used for controlling the on-off between the gas inlet and outlet and the air guide hose (1), the sampling device comprises a sampling pipe (4) which is sleeved at the end part of the air guide hose (1) and is in interference fit with the air guide hose, one end of the sampling pipe (4) far away from the air guide hose (1) is detachably connected with a first filtering component (5), the sampling pipe (4) is also sleeved with a sampling cover (6) of which one end extends out of the sampling pipe (4), an air draft component for extracting external air is arranged in the sampling cover (6), the air draft component comprises a first support (71) detachably connected with the sampling cover (6) and an exhaust fan (72) positioned in the first support (71), and a second filter screen (73) positioned in the first bracket (71) is arranged at the air inlet of the exhaust fan (72).

2. The exhaust gas sampling and holding device for gas chromatography detection according to claim 1, characterized in that: first filter assembly (5) include frame (51) and be located first filter screen (52) of frame, the inner wall threaded connection of frame (51) and sampling tube (4), the inside extension of inner wall of sampling tube (4) has first spacing bulge loop (41) that can support against with frame (51).

3. The exhaust gas sampling and holding device for gas chromatography detection according to claim 2, characterized in that: the second filter screen (73) is a stainless steel filter screen, and the first filter screen (52) is glass wool embedded in the frame (51).

4. The exhaust gas sampling and holding device for gas chromatography detection according to claim 1, characterized in that: sample cover (6) are loudspeaker form's stereoplasm injection molding, the little circle end of sample cover (6) and the outer wall threaded connection of sampling tube (4), the outer wall of sampling tube (4) outwards extends to have can support spacing bulge loop (42) of second that leans on with sample cover (6), first support (71) are held at the great circle of sample cover (6) through the bolt fastening.

5. The exhaust gas sampling and holding device for gas chromatography detection according to claim 1, characterized in that: the sampling pipe (4) is integrated into one piece's stereoplasm injection molding, sampling pipe (4) are including mutual intercommunication sampling section and transmission section, the internal diameter of sampling section is greater than the transmission section, air guide hose (1) is pegged graft in the transmission section, the sampling section is connected with first filtering component (5) and convulsions subassembly.

6. The exhaust gas sampling and holding device for gas chromatography detection according to claim 1, characterized in that: be provided with convenient handheld pole (8) of handing on sampling tube (4), but handheld pole (8) are telescopic link.

7. The exhaust gas sampling and holding device for gas chromatography detection according to claim 1, characterized in that: the stop valve (3) comprises a mouthpiece (31) with an upper opening and a lower opening, the lower end of the mouthpiece (31) is connected with the gas inlet and outlet, the side wall of the mouthpiece (31) is provided with a gas inlet pipe (32) communicated with the mouthpiece, the end part of the sampling pipe (4) is inserted in the gas inlet pipe (32), the mouthpiece (31) is inserted from the upper opening and is provided with a plug (33) capable of moving up and down along the mouthpiece, and the plug (33) can plug the inlet communicated with the mouthpiece (31) and the gas inlet pipe (32).

8. The exhaust gas sampling and holding device for gas chromatography detection according to claim 7, wherein: the plug (33) is an elastic part and is in interference connection with the mouthpiece (31), a third limiting convex ring (34) extends inwards from the inner wall of the mouthpiece (31), and the third limiting convex ring (34) is located at the lower end of an inlet communicated with the mouthpiece (31) and the air inlet pipe (32).