CN213842774U

CN213842774U - Portable multipurpose semi-volatile organic matter sampler

Info

Publication number: CN213842774U
Application number: CN202022564033.2U
Authority: CN
Inventors: 杨洪庆; 解成辉; 魏茂祥; 邹慎浩; 何德生; 李涛; 张敏; 尚春林; 王桂军; 王成业; 朱高英; 徐晶; 王鹏; 陈敏
Original assignee: Qingdao Hengyuan Technology Development Co ltd
Current assignee: Qingdao Hengyuan Technology Development Co ltd
Priority date: 2020-11-09
Filing date: 2020-11-09
Publication date: 2021-07-30
Anticipated expiration: 2030-11-09

Abstract

The utility model belongs to the technical field of the environmental protection detecting instrument, a portable multipurpose semi-volatile organic compounds sample thief is disclosed, its characterized in that: the sampler comprises a sampler host, a sampling head interface, an elastic sealing sleeve and a bracket; the sampling head is hermetically connected with the sampling head interface, the air inlet of the sampler host and the sampling head interface are both inserted into the elastic sealing sleeve, and the elastic sealing sleeve is used for realizing the hermetic connection between the sampling head and the sampling head interface; the sampler host computer is detachably connected with the bracket. The sampler is convenient to transport and carry, particularly, the adsorption material PUF does not need to be wrapped by tinfoil before and after sampling, and the sampler can be used for multiple purposes and samples various samples.

Description

Portable multipurpose semi-volatile organic matter sampler

Technical Field

The utility model belongs to the technical field of the environmental protection detecting instrument, specifically be a portable multipurpose semi-volatile organic compounds sample thief.

Background

Since there are many kinds of semi-volatile organic compounds, including dioxin, polycyclic aromatic hydrocarbon, polychlorinated biphenyl, etc., and the sampling methods of the various organic compounds are different, generally, the samplers used for different samples are different when collecting semi-volatile organic compounds in ambient air. For example, a dioxin sample is collected, a sampler needs to sample at a large flow rate, and the sampling flow rate is about 700/min generally; when a polycyclic aromatic hydrocarbon sample is collected, the general sampling flow is 100/min, all sampling instruments are special, and a sampler capable of collecting a dioxin sample and a polycyclic aromatic hydrocarbon sample simultaneously is not available so far.

The existing sampler has the following defects:

1. the existing large-flow sampler at home and abroad is generally made into a fixed type according to the relevant standards of the world health organization, the main body of the sampler is square, the roof is provided with a ridge-shaped rain hat, the air inlet is downward and shaped like a Chinese character 'hui', the sampler is positioned above the host, the cross section of an air inlet channel is square, a fixed support of the sampler is integrated with the host, and the sampler is characterized by large volume, unadjustable height of a sampling port, generally needing more than two persons to carry, and inconvenient transportation and carrying as well as inconvenient use of field sampling because an ordinary sedan cannot be loaded with the next instrument.

2. The filter membrane of the existing large-flow sampler is generally square, the filter membrane of a domestic instrument has the size of 250 x 230mm, the filter membrane of an imported instrument has the size of 10 inches x 8 inches, and the filter membrane is very troublesome to take out and install; when the adsorption tanks are installed, the tightness of the gas circuit needs to be ensured, and the assembly process is very complicated.

3. Collecting a dioxin sample, wherein the sampling flow is about 700/min; when the polycyclic aromatic hydrocarbon sample is collected, the sampling flow is 100/min, so 2 sampling instruments are needed to complete the collection of the dioxin sample and the polycyclic aromatic hydrocarbon sample, and the sampling cost is high.

4. Adsorbing material PUF of sampling usefulness, will wrap up with the tinfoil around the sampling for prevent that the environment from causing the pollution to the sample, and sampling at every turn all need use a tinfoil, increased the sampling cost.

SUMMERY OF THE UTILITY MODEL

The utility model provides a portable multipurpose semi-volatile organic matter sample thief, the transportation of being convenient for with carry, its adsorbing material PUF need not the tinfoil parcel around especially sampling to can a tractor serves several purposes, sample multiple sample.

For solving the technical problem, the utility model provides a following technical scheme:

a portable multipurpose semi-volatile organic compound sampler comprises a sampler host, a sampling head interface, an elastic sealing sleeve and a bracket; the sampling head is hermetically connected with the sampling head interface, the air inlet of the sampler host and the sampling head interface are both inserted into the elastic sealing sleeve, and the elastic sealing sleeve is used for realizing the hermetic connection between the sampling head and the sampling head interface; the sampler host computer is detachably connected with the bracket.

Preferably, the sampling head is formed by hermetically connecting and combining a membrane sampling device and an adsorption tank.

The membrane sampling device consists of a rain-proof cap, a nut, a compression ring, a filter membrane support, a filter membrane bracket and a connector; the rain-proof cap is fixedly connected with the nut, and the nut is spirally connected with the connector; a compression ring and a filter membrane bracket which are mutually matched are arranged between the nut and the connecting body, the filter membrane bracket is arranged above the connecting body, and the compression ring is arranged below the nut; and a filter membrane support are arranged between the compression ring and the filter membrane bracket, the filter membrane support is arranged on the filter membrane bracket, and the filter membrane is arranged between the compression ring and the filter membrane support.

The cross section of the filter membrane bracket is in a step shape with a high outer part and a low inner part, and the cross section of the compression ring is in a step shape with a low outer part and a high inner part.

Optimally, a sealing ring I is arranged between the compression ring and the nut, a sealing ring II is arranged between the compression ring and the filter membrane bracket, and a sealing ring III is arranged between the filter membrane bracket and the connector.

A support is arranged between the rain-proof cap and the nut, and the support is fixedly connected with the nut and fixedly connected with the rain-proof cap through a screw.

The adsorption tank consists of a lower protective cover, a lower sealing gasket, an absorption cup, an upper protective cover, an upper sealing gasket and a fastening hasp; the lower shield and the upper shield are detachably connected through fastening buckles; the absorption cup is arranged in a cavity defined by the lower protective cover and the upper protective cover, an upper sealing gasket is arranged between the upper end of the absorption cup and the upper protective cover, and a lower sealing gasket is arranged between the lower end of the absorption cup and the lower protective cover. When the adsorption tank is assembled, the absorption cup is placed between the upper shield and the lower shield, and after the fastening hasp is fastened, two end faces of the absorption cup are hermetically connected with the upper shield and the lower shield through the upper sealing gasket and the lower sealing gasket.

Preferably, an elastic sealing ring II is arranged on the outer circle surface of the lower end of the lower shield, and an elastic sealing ring I is arranged on the outer circle surface of the upper end of the upper shield.

The sampling head is inserted into the sampling head interface and is in sealing connection through the elastic sealing ring II.

The elastic sealing ring is tubular, N closed outer ring sealing lines are arranged on the outer surface of the elastic sealing ring, and N is more than or equal to 1 and less than or equal to 20.

The cross section of the outer ring sealing line is triangular, square or circular, and the outer ring sealing line is made of elastic materials such as rubber. The elastic sealing ring I on the outer surface of the upper end of the upper shield of the adsorption tank is matched with the inner surface of the end part of the connector on the membrane sampling device to realize the sealing connection between the elastic sealing ring I and the inner surface of the end part of the connector on the membrane sampling device; during assembly and combination, the adsorption tank is inserted into the connecting body of the membrane sampling device, so that the membrane sampling device and the adsorption tank are connected in a sealing manner, and the assembly and disassembly are fast and trouble-saving.

Preferably, the inner surface of the elastic sealing sleeve is provided with a closed outer ring sealing line. The cross section of the outer ring sealing line is triangular, square or circular.

Optimally, the upper end and the lower end of the adsorption tank are respectively provided with a sealing adaptive end cover, and the adsorption tank covered with the end covers forms a PUF storage bin; the upper end cover is hermetically connected with the upper protective cover through an elastic sealing ring I, and the lower end cover is hermetically connected with the lower protective cover through an elastic sealing ring II. Before sampling, putting the processed PUF into an adsorption tank, and covering an end cover on each of two ends of the adsorption tank to form a PUF storage bin; during sampling, after the two end covers are taken down, the adsorption tank is arranged between the membrane sampling device and the sampling head interface; after sampling, take off the adsorption tank, both ends cover upper end cover is sealed, both convenient to use can save the tinfoil again and prevent environmental pollution sample.

Preferably, the support is a height-adjustable support; in particular to a tripod capable of adjusting the height of the bracket, and a sampler host can be connected on the tripod in a self-locking way. The height of the sampling port of the portable multipurpose semi-volatile organic matter sampler is adjusted through the height-adjustable support, and the sampler main machine and the tripod support can be conveniently separated.

The utility model discloses a portable multipurpose semi-volatile organic compounds sample thief, its circuit system, including the singlechip, by ambient temperature sensor, atmospheric pressure sensor, the preceding pressure sensor of meter, the preceding temperature sensor of meter, flow sensor, the power of bleeding, keyboard, the display of being connected with the singlechip electricity constitute. The sampling gas circuit is formed by connecting a sampling head, a sampling head interface, an elastic sealing sleeve, a sampler host air inlet, a flow sensor, air extraction power and a connecting pipeline thereof in sequence. Compared with the prior art, its beneficial effect is:

1. the sampler has small volume, is convenient to carry and transport, and is suitable for field use.

2. The height of the sampling port is convenient to adjust.

3. The machine has multiple functions; the sampling device can be used for sampling large-flow dioxin and medium-flow polycyclic aromatic hydrocarbon, and can also be used for collecting fluoride and large-flow and medium-flow particle samples after different sampling heads are replaced, so that the purchasing, storage and transportation costs of instruments are saved, and the sampling device has remarkable economic benefits.

4. The assembly and disassembly between the sampling head interface and the host, between the adsorption tank and the sampling head interface, and between the membrane sampling device and the adsorption tank of the sampler are simple and reliable in sealing connection, time-saving and labor-saving, and high in working efficiency.

5. The PUF storage bin is used, so that pollution can be reduced, the PUF storage bin can be repeatedly used, the waste of tinfoil resources is avoided, the cost is saved, and the PUF storage bin also has the advantage of convenience in use.

Drawings

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

Fig. 2 is a schematic sectional structure diagram of a sampling head according to an embodiment of the present invention.

Fig. 3 is a schematic sectional structure diagram of a membrane sampling device according to an embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a section of an adsorption tank according to an embodiment of the present invention.

Fig. 5 is a schematic sectional structure diagram of an elastic sealing ring according to an embodiment of the present invention.

Fig. 6 is a schematic sectional structure view of an elastic sealing sleeve according to an embodiment of the present invention.

Fig. 7 is a schematic diagram of the operation principle of the embodiment of the present invention.

Fig. 8 is a schematic diagram of a cross-sectional structure of a PUF storage chamber according to an embodiment of the present invention.

In the figure: 1. A sampler host; 2. a sampling head; 3. an elastic sealing sleeve; 4. a support; 5. a membrane sampling device; 6. an adsorption tank; 7. a sampling head interface; 8. filtering the membrane; 9. a screw; 10. a pillar; 11. rain-proof caps; 12. a nut; 13. a compression ring; 14. a filter membrane bracket; 15. a filter membrane support; 16. a linker; 18. A lower shield; 19. a lower seal gasket; 20. an absorption cup; 21. an upper seal gasket; 22. an upper shield; 23. fastening a hasp; 101. a pre-metering temperature sensor; 102. a pre-metering pressure sensor; 103. a flow sensor; 104. Air extraction power; 105. a keyboard; 106 a display; 107. a single chip microcomputer; 108. an ambient temperature sensor; 109. an atmospheric pressure sensor; 1701. A sealing ring I; 1702. a sealing ring II; 1703. a sealing ring III; 2401. an elastic sealing ring I; 2402. an elastic sealing ring II; 2403. an outer ring seal line; 2501. an upper end cover; 2502. a lower end cover; 301. the inner ring seals the line.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Examples

As shown in figure 1, a portable multipurpose semi-volatile organic compound sampler comprises a sampler main body 1, a sampling head 2, a sampling head interface 7, an elastic sealing sleeve 3 and a bracket 4; the sampling head 2 is hermetically connected with a sampling head interface 7, the air inlet of the sampler host 1 and the sampling head interface 7 are both inserted into the elastic sealing sleeve 3, and the elastic sealing sleeve 3 is used for realizing the hermetic connection between the two; the sampler host 1 is detachably connected with the bracket 4.

As shown in fig. 1 and 2, the sampling head 2 is formed by hermetically connecting and combining a membrane sampling device 5 and an adsorption tank 6.

As shown in fig. 1, 2, 3 and 4, the membrane sampling device 5 is composed of a rain-proof cap 11, a nut 12, a compression ring 13, a filter membrane 8, a filter membrane holder 15, a filter membrane bracket 14 and a connector 16; the rain hat 11 is fixedly connected with a nut 12, and the nut 12 is in threaded connection with a connecting body 16; a compression ring 13 and a filter membrane bracket 14 which are mutually matched are arranged between the nut 12 and the connecting body 16, the filter membrane bracket 14 is arranged above the connecting body 16, and the compression ring 13 is arranged below the nut 12; a filter membrane 8 and a filter membrane holder 15 are arranged between the compression ring 13 and the filter membrane bracket 14, the filter membrane holder 15 is arranged on the filter membrane bracket 14, and the filter membrane 8 is arranged between the compression ring 13 and the filter membrane holder 15. It can be seen that the filter membrane carrier 14 has a stepped cross-sectional shape with a high outer portion and a low inner portion, and the clamp ring 13 has a stepped cross-sectional shape with a low outer portion and a high inner portion. A sealing ring I1701 is arranged between the compression ring 13 and the nut 12, a sealing ring II 1702 is arranged between the compression ring 13 and the filter membrane bracket 14, and a sealing ring III 1703 is arranged between the filter membrane bracket 14 and the connecting body 16.

A support post 10 is arranged between the rain hat 11 and the nut 12, and the support post 10 is fixedly connected with the nut 12 and fixedly connected with the rain hat 11 through a screw 9.

As shown in fig. 1, 2, 4 and 8, the adsorption tank 6 is composed of a lower shield 18, a lower sealing gasket 19, an absorption cup 20, an upper shield 22, an upper sealing gasket 21 and a fastening buckle 23; the lower shield 18 is detachably connected with the upper shield 22 through a fastening buckle 23; the absorption cup 20 is arranged in a cavity defined by the lower protective cover 18 and the upper protective cover 22, an upper sealing gasket 21 is arranged between the upper end of the absorption cup 20 and the upper protective cover 22, and a lower sealing gasket 19 is arranged between the lower end of the absorption cup 20 and the lower protective cover 18. When the adsorption tank 6 is assembled, the absorption cup 20 is placed between the upper shield and the lower shield, and after the fastening hasp 23 is fastened, two end faces of the absorption cup 20 are respectively connected with the upper shield and the lower shield in a sealing manner through the upper sealing gasket and the lower sealing gasket. An elastic sealing ring II 2402 is arranged on the outer circular surface of the lower end of the lower protective cover 18, and an elastic sealing ring I2401 is arranged on the outer circular surface of the upper end of the upper protective cover 22.

The sampling head 2 is inserted into the sampling head interface 7 and is in sealing connection through an elastic sealing ring II 2402.

As shown in FIG. 5, the elastic sealing ring comprises an elastic sealing ring I2401 and an elastic sealing ring II 2402 which are tubular, and 4 closed outer ring sealing lines 2403 are arranged on the outer surface of the elastic sealing ring. The cross section of the outer ring sealing line 2403 is triangular, but may also be square, circular or other cross section, and the material thereof is an elastic material such as rubber.

As shown in fig. 1, 2, 4 and 5, the elastic sealing ring i 2401 on the outer surface of the upper end of the upper shield 22 of the adsorption tank 6 is matched with the inner surface of the end part of the connecting body 16 on the membrane sampling device 5 to realize the sealing connection between the two; during assembly and combination, the adsorption tank 6 is inserted into the connector 16 of the membrane sampling device 5, so that the membrane sampling device 5 and the adsorption tank 6 are connected in a sealing manner, and the assembly and disassembly are fast and trouble-saving.

As shown in fig. 1 and 6, the inner surface of the elastic sealing sleeve 3 is provided with a closed outer ring sealing line 301. The cross section of the outer ring sealing line 301 is triangular, but may also be square, circular or other cross-sectional shapes.

As shown in fig. 2, 4 and 8, the upper end and the lower end of the adsorption tank 6 are respectively provided with a hermetically matched end cap, and the adsorption tank 6 covered with the end caps forms the PUF storage bin shown in fig. 8; the upper end cap 2501 is connected with the upper shield 22 in a sealing way through an elastic sealing ring I2401, and the lower end cap 2502 is connected with the lower shield 18 in a sealing way through an elastic sealing ring II 2402. Before sampling, the processed PUF is placed into an adsorption tank 6, and two end covers are respectively covered at two ends of the adsorption tank 6 to form a PUF storage bin as shown in figure 8; during sampling, after two end covers are taken down, the adsorption tank 6 is arranged between the membrane sampling device 5 and the sampling head interface 7; after sampling is finished, the adsorption tank 6 is taken down and is sealed by covering two end covers to form the PUF storage bin shown in figure 8. Not only is convenient to use, but also can save the tinfoil and prevent the environmental pollution of samples.

As shown in fig. 1, the support 4 is a height-adjustable support; in the embodiment, the sampler host 1 is a tripod 4 with adjustable bracket height and is connected to the tripod 4 in a self-locking manner. The height of the sampling port of the portable multipurpose semi-volatile organic compound sampler of the embodiment is adjusted through the tripod 4 with adjustable height, and the sampler host 1 and the tripod 4 can be conveniently separated.

As shown in fig. 1 and 7, the circuit system of the portable multipurpose semi-volatile organic compound sampler of the present embodiment includes a single chip 107, and is composed of an ambient temperature sensor 108, an atmospheric pressure sensor 109, a pre-measurement pressure sensor 102, a pre-measurement temperature sensor 101, a flow sensor 103, an air-extracting power 104, a keyboard 105, and a display 106, which are electrically connected to the single chip 107. The sampling gas circuit of the sampler is formed by sequentially connecting a sampling head 2, a sampling head interface 7, an elastic sealing sleeve 3, a sampler main machine 1 gas inlet, a flow sensor 103, an air extraction power 104 and a connecting pipeline thereof.

The flow measurement range of the flow sensor of the portable multipurpose semi-volatile organic compound sampler is 10-1300L/min; therefore, when the fluoride sampling head is matched, the sampling head can also be used for sampling the fluoride with the sampling flow of 50L/min; when the particulate matter cutter with the working point flow of 100L/min or the working point flow of 16.7L/min is matched, the particulate matter cutter can be used for collecting corresponding particulate matter samples such as TSP \ PM10\ PM2.5 and the like.

Before sampling, the filter membrane 8 and the adsorbent are respectively arranged in the membrane sampling device 5 and the adsorption tank 6, and the height of a sampling port is adjusted to 1.5 m. During sampling, under the negative pressure effect of air exhaust power, ambient air enters the membrane sampling device, when the ambient air passes through the filter membrane, a reservoir internal state sample in the air is blocked on the filter membrane, the gaseous sample passes through the filter membrane and is absorbed by the adsorbent in the adsorption tank, and the rest air is exhausted to the atmosphere after passing through the flow sensor and the air exhaust power. And after sampling is finished, taking the filter membrane out of the membrane sampling device, putting the filter membrane into a sample box, taking the adsorption tank down, sealing and covering two end faces to form a PUF sealed bin, and sending the PUF sealed bin to a laboratory for analysis.

The working process of the portable multipurpose semi-volatile organic compound sampler in this embodiment takes large flow rate dioxin sampling, the flow rate 700L/min as an example, and is described as follows:

before sampling, sampling according to a method of HJ77.2-2008 'isotope dilution high-resolution gas chromatography-high-resolution mass spectrometry for determining environmental air and waste gas dioxins', and quantitatively sampling 1000 m for carrying out heavy planting; after the system is started, the single chip microcomputer starts air extraction power to work according to the set flow rate of 700L/min, numerical values measured by the ambient temperature sensor, the atmospheric pressure sensor, the pre-metering temperature sensor and the flow sensor are all transmitted to the single chip microcomputer, and the single chip microcomputer converts the data into a flow rate value at a sampling port, compares the flow rate value with the set flow rate value and adjusts the flow rate value; when the actual sampling flow value is larger than the set value, the singlechip controls the air exhaust power to reduce the rotating speed, so that the sampling flow value is consistent with the set value; otherwise, the singlechip controls the air exhaust power to increase the rotating speed, so that the sampling flow value is consistent with the set value, and constant flow sampling is realized. When the accumulated sample volume reaches sample quantification 1000 m, the sampler ends sampling.

The utility model discloses a portable multipurpose semi-volatile organic compounds sample thief, compared with the prior art, its beneficial effect is:

2. The height of the sampling port is convenient to adjust.

Claims

1. A portable multipurpose semi-volatile organic compound sampler is characterized in that: the sampler comprises a sampler host, a sampling head interface, an elastic sealing sleeve and a bracket; the sampling head is hermetically connected with the sampling head interface, the air inlet of the sampler host and the sampling head interface are both inserted into the elastic sealing sleeve, and the elastic sealing sleeve is used for realizing the hermetic connection between the sampling head and the sampling head interface; the sampler host computer is detachably connected with the bracket.

2. The sampler of claim 1, wherein: the sampling head is formed by hermetically connecting and combining a membrane sampling device and an adsorption tank.

3. The sampler of claim 2, wherein: the membrane sampling device consists of a rain-proof cap, a nut, a compression ring, a filter membrane support, a filter membrane bracket and a connector; the rain-proof cap is fixedly connected with the nut, and the nut is spirally connected with the connector; a compression ring and a filter membrane bracket which are mutually matched are arranged between the nut and the connecting body, the filter membrane bracket is arranged above the connecting body, and the compression ring is arranged below the nut; and a filter membrane support are arranged between the compression ring and the filter membrane bracket, the filter membrane support is arranged on the filter membrane bracket, and the filter membrane is arranged between the compression ring and the filter membrane support.

4. The sampler of claim 3, wherein: a sealing ring I is arranged between the compression ring and the nut, a sealing ring II is arranged between the compression ring and the filter membrane bracket, and a sealing ring III is arranged between the filter membrane bracket and the connector; the cross section of the filter membrane bracket is in a step shape with a high outer part and a low inner part, and the cross section of the compression ring is in a step shape with a low outer part and a high inner part.

5. The sampler of claim 4, wherein: a support is arranged between the rain-proof cap and the nut, and the support is fixedly connected with the nut and fixedly connected with the rain-proof cap through a screw.

6. The sampler of claim 2, wherein: the adsorption tank consists of a lower protective cover, a lower sealing gasket, an absorption cup, an upper protective cover, an upper sealing gasket and a fastening hasp; the lower shield and the upper shield are detachably connected through fastening buckles; the absorption cup is arranged in a cavity defined by the lower protective cover and the upper protective cover, an upper sealing gasket is arranged between the upper end of the absorption cup and the upper protective cover, and a lower sealing gasket is arranged between the lower end of the absorption cup and the lower protective cover.

7. The sampler of claim 6, wherein: an elastic sealing ring II is arranged on the surface of the excircle of the lower end of the lower shield, and the sampling head is hermetically connected with a sampling head interface through the elastic sealing ring II; an elastic sealing ring I is arranged on the outer circle surface of the upper end of the upper shield; the elastic sealing rings I and II are both tubular, N closed outer ring sealing lines are arranged on the outer surfaces of the elastic sealing rings I and II, N is more than or equal to 1 and less than or equal to 20, and the cross sections of the outer ring sealing lines are triangular, square or circular.

8. The sampler of claim 7, wherein: the upper end and the lower end of the adsorption tank are respectively provided with a sealing adaptive end cover, and the adsorption tank covered with the end cover forms a PUF storage bin; the upper end cover is hermetically connected with the upper protective cover through an elastic sealing ring I, and the lower end cover is hermetically connected with the lower protective cover through an elastic sealing ring II.

9. The sampler of claim 2, wherein: the inner surface of the elastic sealing sleeve is provided with a closed inner ring sealing line; the cross section of the inner ring sealing line is triangular, square or circular; the bracket is a tripod bracket with adjustable bracket height, and the sampler host can be connected on the tripod bracket in a self-locking manner.