CN214953218U - Mass spectrometer for VOCs (volatile organic compounds) navigation monitoring - Google Patents

Abstract

The utility model discloses a VOCs is walked by navigation and is monitored mass spectrograph relates to mass spectrograph technical field, including particle beam forming device and vacuum apparatus, particle beam forming device is including fixing the fixed pipe at the vacuum apparatus top, and fixed socle portion is provided with the particle beam export, and fixed pipe is located vacuum apparatus for one section, and fixed pipe is located vacuum apparatus for another section and the thread bush is equipped with the sampling pipe outward, and fixed intraductal threaded connection has the particle beam to form the pipe, is provided with a plurality of aerodynamic lens that from the top down arranged in the particle beam formation pipe, the utility model has the advantages of conveniently changing particle beam forming device, reducing use cost, increasing the utilization ratio.

Description

Mass spectrometer for VOCs (volatile organic compounds) navigation monitoring

Technical Field

The utility model relates to a mass spectrograph technical field, concretely relates to VOCs is walked to navigate and is monitored and use mass spectrograph.

Background

Volatile Organic Compounds (VOCs) are important precursors for forming secondary pollutants such as fine particulate matters (PM2.5) and ozone (O3), and further cause atmospheric environmental problems such as dust haze and photochemical smog. The navigation monitoring system is used for rapidly establishing a regional atmosphere VOCs pollution space-time 'portrait' and establishing a regional atmosphere VOCs 'dynamic direct reading' mode by means of detecting while moving a mobile monitoring vehicle, monitoring and analyzing online data in real time, establishing geographic position-species-concentration correlation and the like.

The core equipment in the navigation monitoring system is a detection mass spectrometer, and the physicochemical characteristics of single particles in detected particles are determined according to a measured mass spectrogram so as to help acquire the pollution condition analysis data of the current environmental area. When the aerodynamic particle size of a single particle needs to be detected, a collected gas sample is subjected to a series of processes of focusing, collecting, ionizing, analyzing and the like, before ionization is carried out, a plurality of dispersed particles need to form a particle beam in single-sequence arrangement through a particle beam forming device, a plurality of aerodynamic lenses are generally arranged in the device, and therefore the particle beam is quickly and stably formed by gathering the particles.

SUMMERY OF THE UTILITY MODEL

To the defect among the prior art, the utility model provides a VOCs walks to navigate and monitors and uses mass spectrograph to reach and conveniently change particle beam forming device, reduce use cost's effect.

In order to solve the technical problem, the utility model adopts the following technical scheme:

the utility model provides a VOCs is walked by navigation and is monitored and is used mass spectrograph, includes particle beam forming device and vacuum apparatus, and particle beam forming device is including fixing the fixed pipe at the vacuum apparatus top, and fixed socle portion is provided with the particle beam export, and fixed pipe is located vacuum apparatus for one section, and fixed pipe another section is located vacuum apparatus and the thread bush is equipped with the sampling pipe outward, and fixed intraductal threaded connection has the particle beam to form the pipe, is provided with a plurality of aerodynamic lens that arrange from the top down in the particle beam formation pipe.

Preferably, the particle beam forming device further comprises an installation auxiliary mechanism, the installation auxiliary mechanism comprises a clamping rod, a clamping groove matched with the end part of the clamping rod is formed in the inner wall of the particle beam forming tube, the clamping rod is vertically connected with a vertical rod, and the top of the vertical rod is vertically connected with a torsion rod.

Preferably, the sampling pipe includes advance appearance pipe, advances to be provided with the critical hole in the appearance intraductal, advances appearance socle portion and is connected with the buffer tube, and the buffer tube internal diameter is greater than advance appearance pipe, and the buffer tube bottom is connected with the internal thread pipe, and internal thread pipe thread bush is established on fixed pipe.

Preferably, the center of the aerodynamic lens is provided with a through hole, and the aperture of the through holes decreases gradually from top to bottom.

Preferably, the vacuum device comprises a housing, a first vacuum chamber, a second vacuum chamber and a third vacuum chamber are arranged in the housing in sequence from top to bottom, the lower section of the fixing tube is located in the first vacuum chamber, a partition plate is arranged between the second vacuum chamber and the third vacuum chamber, a particle through opening is arranged on the partition plate, a separation cone opening is arranged between the first vacuum chamber and the second vacuum chamber, the separation cone opening is located right above the particle through opening, and the separation cone opening is located right below the particle beam outlet.

Preferably, the bottom of the casing is connected with an ionization device, and the ionization device is electrically connected with a time-of-flight mass spectrometer.

Preferably, the bottom of the partition board is hinged with a plugging plate, the plugging plate can plug particle openings, the other end of the plugging plate is connected with a traction mechanism, and the traction mechanism is used for driving the plugging plate to rotate.

Preferably, the traction mechanism comprises a driving motor positioned outside the casing, an output shaft of the driving motor is connected with a winding wheel, a traction rope is wound on the winding wheel, and the traction rope movably penetrates through the side wall of the casing and is connected with the plugging plate.

The beneficial effects of the utility model are embodied in:

1. the utility model provides a particle beam forming device is detachable construction, and wherein fixed pipe and sampling pipe are the universal section and need not change, only the particle beam forming pipe that needs to be changed at every turn, consequently only need prepare out the particle beam forming pipe that corresponds the specification can to reduce use cost, and improved universal section's utilization ratio, also need not to carry out the dismouting with whole particle beam forming device during the change, operate convenient and fast more.

2. When the particle beam forming tube is installed, the auxiliary mechanism can be installed by using an auxiliary tool to screw the particle beam forming tube into the fixing tube, and the particle beam forming tube can be conveniently screwed out, so that the particle beam forming tube is convenient to disassemble and assemble.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

Fig. 1 is a schematic structural diagram of a mass spectrometer for VOCs voyage monitoring provided by the present invention;

FIG. 2 is a schematic structural view of the particle port of the present invention when closed;

FIG. 3 is a schematic structural view of a particle beam forming apparatus according to the present invention;

fig. 4 is an exploded view of the particle beam forming apparatus according to the present invention;

fig. 5 is a schematic structural view of the particle beam forming tube of the present invention when connected to the installation assisting mechanism.

Reference numerals:

100-vacuum device, 110-housing, 120-first vacuum chamber, 130-second vacuum chamber, 140-third vacuum chamber, 150-partition plate, 151-particle port, 160-separation cone, 200-particle beam forming device, 210-fixed tube, 211-particle beam outlet, 220-sampling tube, 221-sample tube, 222-critical hole, 223-buffer tube, 224-internal thread tube, 230-particle beam forming tube, 240-aerodynamic lens, 241-through hole, 300-installation auxiliary mechanism, 310-clamping rod, 320-vertical rod, 330-torsion rod, 400-ionization device, 500-flight time mass spectrometer, 600-blocking plate, 700-traction mechanism, 710-driving motor, 720-reel, 730-pulling the rope.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, the description is only for convenience of description of the present invention and simplification, but the indication or suggestion that the device or element to be referred must have a specific position, be constructed and operated in a specific position, and therefore, the present invention should not be construed as being limited thereto. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not require that the components be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the embodiments of the present invention, "a number" means at least 2.

In the description of the embodiments of the present invention, it should be further noted that unless explicitly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Examples

As shown in fig. 1 to 5, the present embodiment provides a mass spectrometer for VOCs navigation monitoring, including a particle beam forming device 200 and a vacuum device 100, the vacuum device 100 is used to ensure a vacuum degree during detection, the particle beam forming device 200 includes a fixed tube 210 fixed on the top of the vacuum device 100, a particle beam outlet 211 is provided at the bottom of the fixed tube 210, one section of the fixed tube 210 is located in the vacuum device 100, the other section of the fixed tube 210 is located outside the vacuum device 100 and is threaded with a sampling tube 220, a particle beam forming tube 230 is connected to the fixed tube 210 through a thread, and a plurality of aerodynamic lenses 240 arranged from top to bottom are provided in the particle beam forming tube 230.

In this embodiment, according to the type of the detected particles, when the particle beam forming device 200 needs to be replaced, the sampling tube 220 is first screwed out from the top of the fixed tube 210, then the particle beam forming tube 230 is screwed out, the particle beam forming tube 230 with the corresponding specification (the number, the model, and the like of the aerodynamic lenses 240 inside the particle beam forming tube) is selected and installed again in the fixed tube 210, and then the sampling tube 220 is sleeved on the top of the fixed tube 210, so as to rapidly complete the disassembly and assembly of the particle beam forming device 200, thereby improving the application range, the fixed tube 210 is fixed on the vacuum device 100 without disassembly, the fixed tube 210 and the sampling tube 220 are universal parts without replacement, only the particle beam forming tube 230 needs to be replaced each time, therefore, only the particle beam forming tube 230 with the corresponding specification needs to be prepared, thereby reducing the use cost and improving the utilization rate of the universal parts, the whole particle beam forming apparatus 200 does not need to be disassembled and assembled during replacement, so that the operation is more convenient and faster, and the practicability is high.

Specifically, the device further comprises an installation auxiliary mechanism 300, the installation auxiliary mechanism 300 comprises a clamping rod 310, a clamping groove matched with the end of the clamping rod 310 is formed in the inner wall of the particle beam forming tube 230, a vertical rod 320 is vertically connected to the clamping rod 310, and a torsion bar 330 is vertically connected to the top of the vertical rod 320.

When the particle beam forming tube 230 is mounted and dismounted, in order to completely screw the particle beam forming tube 230 into the fixing tube 210 and achieve the effect of saving power, the ends of the clamping rods 310 are clamped into the corresponding clamping grooves by using the mounting auxiliary mechanism 300, and the torsion bar 330 is driven to rotate by hand and automatic equipment, so that the particle beam forming tube 230 is screwed into or out of the fixing tube 210, and the operation is convenient.

Specifically, sampling pipe 220 includes sampling pipe 221, be provided with critical hole 222 in the sampling pipe 221, the velocity of motion after the particulate matter passes through critical hole 222 is accelerated, sampling pipe 221 bottom is connected with buffer tube 223, buffer tube 223 internal diameter is greater than sampling pipe 221, buffer tube 223 bottom is connected with internal thread pipe 224, internal thread pipe 224 threaded sleeve is established on fixed pipe 210, then the particulate matter cushions in buffer tube 223, speed reduces for the speed of particulate matter accords with the operating condition that the particle beam formed pipe 230.

Specifically, through-hole 241 has all been seted up at aerodynamic lens 240 center, and from the top down the aperture of a plurality of through-holes 241 diminishes in proper order, can carry out rapid and stable ground gathering to the particulate matter, can also reduce the particulate matter because the loss that hits the wall and cause.

Specifically, vacuum apparatus 100 includes a housing 110, a first vacuum chamber 120, a second vacuum chamber 130, and a third vacuum chamber 140 are disposed in the housing 110 in sequence from top to bottom, a lower section of a fixing tube 210 is located in first vacuum chamber 120, a partition plate 150 is disposed between second vacuum chamber 130 and third vacuum chamber 140, a particle passage 151 is disposed on partition plate 150, a separation cone 160 is disposed between first vacuum chamber 120 and second vacuum chamber 130, separation cone 160 is located directly above particle passage 151, and separation cone 160 is located directly below particle beam outlet 211. Here, a plurality of vacuum chambers are provided to increase the degree of vacuum during the inspection, and vacuum pumps (not shown) are connected to the first vacuum chamber 120, the second vacuum chamber 130, and the third vacuum chamber 140.

Specifically, the bottom of the housing 110 is connected to an ionization device 400, the ionization device 400 is electrically connected to a time-of-flight mass spectrometer 500, the particle beam is ionized into cations and anions after entering the ionization device 400, a mass spectrogram of the single particles in the particles to be detected is finally obtained, and the physicochemical properties of the single particles in the detected particles are determined according to the mass spectrogram.

It should be noted that the ionization device 400 is the prior art, a cation reflection electrode, an anion reflection electrode, a cation detector and an anion detector (none of which is shown in the figures) are arranged inside the ionization device, and the time-of-flight mass spectrometer 500 is also the prior art, and the specific structure and principle thereof are not described herein again.

Specifically, the bottom of the partition 150 is hinged with a blocking plate 600, the blocking plate 600 can block the particle through hole 151, the other end of the blocking plate 600 is connected with a traction mechanism 700, the traction mechanism 700 is used for driving the blocking plate 600 to rotate, the traction mechanism 700 comprises a driving motor 710 located outside the casing 110, an output shaft of the driving motor 710 is connected with a winding wheel 720, a traction rope 730 is wound on the winding wheel 720, and the traction rope 730 movably penetrates through the side wall of the casing 110 and is connected with the blocking plate 600.

For guaranteeing that the particle through the particle opening is single, after a particle gets into ionization device 400, driving motor 710 drives reel 720 and rotates to drive haulage rope 730 to receive line pulling closure plate 600 and rotate to the horizontality, can block up particle opening 151 automatically, avoid next waiting to detect the particle and get into ionization device 400, make driving motor 710 reversal pay-off to haulage rope 730 when needing to open, thereby open particle opening 151 fast.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.

Claims (8)

1. The utility model provides a VOCs is walked and is monitored and used mass spectrograph, includes particle beam forming device and vacuum apparatus, its characterized in that, particle beam forming device is including fixing the fixed pipe at the vacuum apparatus top, fixed socle portion is provided with the particle beam export, fixed pipe one section is located vacuum apparatus, fixed pipe another section is located vacuum apparatus and threaded sleeve is equipped with the sampling pipe, fixed intraductal threaded connection has the particle beam forming tube, be provided with a plurality of aerodynamic lens that arrange from the top down in the particle beam forming tube.

2. The mass spectrometer of claim 1, further comprising an installation assisting mechanism, wherein the installation assisting mechanism comprises a clamping rod, a clamping groove matched with an end of the clamping rod is formed in an inner wall of the particle beam forming tube, a vertical rod is vertically connected to the clamping rod, and a torsion rod is vertically connected to a top of the vertical rod.

3. The mass spectrometer of claim 1 or 2, wherein the sampling tube comprises a sampling tube, a critical hole is formed in the sampling tube, a buffer tube is connected to the bottom of the sampling tube, the inner diameter of the buffer tube is larger than that of the sampling tube, an internal thread tube is connected to the bottom of the buffer tube, and the internal thread tube is screwed on the fixing tube.

4. The mass spectrometer of claim 1, wherein the center of each of the aerodynamic lenses is provided with a through hole, and the apertures of the through holes decrease progressively from top to bottom.

5. The mass spectrometer of claim 4, wherein the vacuum device comprises a housing, the housing has a first vacuum chamber, a second vacuum chamber and a third vacuum chamber sequentially arranged from top to bottom, the lower section of the fixed tube is located in the first vacuum chamber, a partition plate is disposed between the second vacuum chamber and the third vacuum chamber, the partition plate has a particle opening, a separation cone is disposed between the first vacuum chamber and the second vacuum chamber, the separation cone is located directly above the particle opening, and the separation cone is located directly below the particle beam outlet.

6. A mass spectrometer for VOCs aviation monitoring according to claim 5, wherein an ionization device is connected to the bottom of the housing, and the ionization device is electrically connected to a time-of-flight mass spectrometer.

7. The mass spectrometer of claim 6, wherein a blocking plate is hinged to the bottom of the partition plate, the blocking plate can block the particle through hole, and a traction mechanism is connected to the other end of the blocking plate and used for driving the blocking plate to rotate.

8. The mass spectrometer of claim 7, wherein the pulling mechanism comprises a driving motor located outside the casing, an output shaft of the driving motor is connected with a winding wheel, a pulling rope is wound on the winding wheel, and the pulling rope movably penetrates through a side wall of the casing and is connected with the plugging plate.

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