CN214121724U

CN214121724U - Gas sampling supercharging device

Info

Publication number: CN214121724U
Application number: CN202021949842.9U
Authority: CN
Inventors: 不公告发明人
Original assignee: 63653 Troops of PLA
Current assignee: 63653 Troops of PLA
Priority date: 2020-09-08
Filing date: 2020-09-08
Publication date: 2021-09-03
Anticipated expiration: 2030-09-08

Abstract

The utility model belongs to the technical field of gaseous sample, be for gaseous sample design a portable gaseous sampling equipment based on syringe pressure regulating, especially gaseous sample supercharging device, including corresponding casing, handle, airtight syringe, manual three way switch valve, first advance/outlet duct, second advance/outlet duct, linear electric motor, pressure sensor, air duct, the filler block of assembling together. The utility model relates to a reasonable in design and commonality are strong, the portability is good and open-air strong adaptability's gas sampling equipment, compact structure, the portability is good, and open-air strong adaptability adjusts the pressure of gas sample through airtight syringe, under the condition that does not destroy original sample, with the sample of gathering with malleation state storage, the realization is to the air supply sample collection that is negative pressure or ordinary pressure state to satisfy the demand of gas sample multiple analysis. The utility model discloses when being used for negative pressure air supply and open-air extensive gaseous sample collection, technical advantage is quite obvious.

Description

Gas sampling supercharging device

Technical Field

The utility model belongs to the technical field of the gas sampling, be for the gas sampling design a portable gas sampling equipment based on syringe pressure regulating, especially gaseous sample supercharging device.

Background

Currently, the commonly used gas sampling devices mainly include: syringes, vacuum sampling bottles, air samplers, air compressors, and the like. The injector can be used for collecting a normal pressure or positive pressure gas source, the collected gas sample is stored in a normal pressure state, but a sealing valve is required to be additionally arranged for sampling the negative pressure gas source, so that gas sampling is difficult, and impurity gas is easily introduced. When the vacuum sampling bottle collects a gas sample, the vacuum pump is used for pumping the sampling bottle into negative pressure, and then the sampling bottle is in butt joint with an air source, and the collected gas sample is usually in a negative pressure or normal pressure state, so that the subsequent multiple analyses of the sample are inconvenient. The air sampler is used for collecting a normal-pressure air sample, storing the sample in a gas sampling bag and has no effect on the collection of a negative-pressure air source. The air compressor can store the sample in a positive pressure state, but cross contamination exists for the collection of gas samples with different concentrations, and the portability and the field adaptability are not strong.

The prior art literature contrasts and analyses show that the existing gas sampling devices are various in types, but hardware structures are not compact enough, the general portability is not high, the field adaptability is not strong, the sampling device is not suitable for collecting a negative pressure gas source, the risk of gas cross contamination exists, and the utilization rate of samples is not high.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a gas sampling supercharging device is applicable to the collection of negative pressure air supply, avoids the cross contamination among the gas sampling process, and the portability is better, and open-air gas acquisition adaptability is good.

The purpose of the utility model is realized like this: a gas sampling supercharging device comprises a shell, a handle, an airtight injector, a manual three-way switch valve, a first air inlet/outlet pipe, a second air inlet/outlet pipe, a linear motor, a pressure sensor, an air guide pipe and a filling filler block; three openings have been seted up to manual three way switch valve self: the shell is cylindrical and is made of aluminum alloy plates, the manual three-way switch valve is used for driving a valve core positioned in a valve cavity to move so as to respectively and correspondingly open or close the first air inlet/outlet, the second air inlet/outlet and the third air inlet/outlet, the front end of the shell is fixedly provided with a handle, a linear motor, an airtight injector, an air guide pipe, a manual three-way switch valve and a hollow part are sequentially and fixedly arranged in the shell towards the direction from the rear end of the shell to the front end of the shell, an annular part adjacent to and surrounding the hollow part of the peripheral wall of the shell is provided with an operation opening penetrating through the peripheral wall of the shell in the thickness direction in a mirror symmetry mode, the operation opening is communicated with the hollow part, the hollow part is a gap reserved between the front end wall of the shell and the manual three-way switch valve, and the manual three-way switch valve is provided with a rotating handle which is correspondingly adjacent to the hollow part, the opening of the operation opening can facilitate the manual hand to extend into the front part of the shell through the manual three-way switch valve to control the opening and closing state of a corresponding port of the manual three-way switch valve through a rotating handle manually rotated by a person, the front end of a telescopic shaft of a linear motor is fixedly connected with the rear end of a piston rod of an airtight injector, the linear motor reciprocates through the piston rod of the airtight injector in a mode of extending out or retracting in the telescopic shaft of the linear motor so as to drive the airtight injector to suck or discharge gas, a nipple (namely, a pipe orifice communicated with an empty cylinder is arranged at the front end of the empty cylinder of the existing airtight injector, and a piston of the airtight injector reciprocates and slides in the empty cylinder along the length direction of the empty cylinder in a dynamic seal way, so that external gas can be pumped into the empty cylinder through the pipe orifice or the gas in the empty cylinder is discharged to the outside through the pipe orifice) and is fixedly sealed and communicated with a second gas inlet/outlet of the manual three-way switch valve through a gas guide pipe, the first air inlet/outlet pipe and the second air inlet/outlet pipe are symmetrically arranged by taking the manual three-way switch valve as a central shaft, and respectively penetrate through the peripheral wall of the shell along the thickness direction of the peripheral wall through the through holes formed in the peripheral wall of the shell, the inner end pipe orifices of the first air inlet/outlet pipe and the second air inlet/outlet pipe are arranged in the shell, the outer end pipe orifices of the first air inlet/outlet pipe and the second air inlet/outlet pipe are arranged outside the shell, the first air inlet/outlet pipe of the manual three-way switch valve is fixedly and hermetically communicated with the inner end pipe orifice of the first air inlet/outlet pipe, and the third air inlet/outlet port of the manual three-way switch valve is fixedly and hermetically communicated with the inner end pipe orifice of the second air inlet/outlet pipe; the filler pads are divided into a first filler pad, a second filler pad and a third filler pad, the first filler pad shaft is filled in pairs in a gap between a housing wall thereof and the airtight injector in the housing to fix the airtight injector in the housing in an axisymmetric manner with respect to the airtight injector; the first filling filler blocks are axially symmetrical relative to the airtight injector to fill a vacant space between the peripheral wall of the shell and the front part of the shell in the airtight injector, the airtight injector is fixed with the peripheral wall of the shell through the first filling filler blocks in a mode of being arranged between the two first filling filler blocks, and the second filling filler blocks (composed of aluminum alloy fixed blocks) and the third filling filler blocks (composed of plastic filling blocks) are respectively filled in pairs in a gap between the shell wall of the shell and the linear motor to fix the linear motor shell body in the shell in a mode of being symmetrical relative to a linear motor shaft.

Note: the specific and clear operation flow and working principle of the present invention are described in the detailed description of the present specification, and the detailed description of the specific and clear operation flow and working principle of the present invention is provided in the detailed description of the specific embodiment.

The utility model has the advantages of: the utility model relates to a reasonable in design and commonality are strong, the portability is good and open-air strong adaptability's gas sampling equipment, compact structure, the portability is good, and open-air strong adaptability adjusts the pressure of gas sample through airtight syringe, under the condition that does not destroy original sample, with the sample of gathering with malleation state storage, the realization is to the air supply sample collection that is negative pressure or ordinary pressure state to satisfy the demand of gas sample multiple analysis. The utility model discloses when being used for negative pressure air supply and open-air extensive gaseous sample collection, technical advantage is quite obvious.

Drawings

The present invention will be further explained with reference to the accompanying drawings.

Fig. 1 is a perspective structure diagram of the main body of the present invention.

Detailed Description

A gas sampling supercharging device is shown in figure 1, and comprises a shell 16, a handle 11, an airtight injector 9, a manual three-way switch valve 6, a first air inlet/outlet pipe 2, a second air inlet/outlet pipe 7, a linear motor 5, a pressure sensor 3, an air guide pipe 8 and a filling filler block which are correspondingly assembled together; three openings have been seted up to manual three way switch valve 6 self: a first air inlet/outlet 12, a second air inlet/outlet 14 and a third air inlet/outlet 15, wherein the housing 16 is cylindrical and made of aluminum alloy plate, the manual three-way switch valve 6 respectively and correspondingly opens or closes the first air inlet/outlet 12, the second air inlet/outlet 14 and the third air inlet/outlet 15 by driving the valve core located in the valve cavity to move, a handle 11 is fixedly arranged at the front end of the housing 16, the design of the handle 11 can facilitate the hand to carry the utility model by holding the handle 11 by hand, the linear motor 5, the airtight injector 9, the air duct 8, the manual three-way switch valve 6 and the hollow part 1 are fixedly arranged in the housing 16 in sequence towards the direction from the rear end of the housing 16 to the front end thereof, and an operation opening 18 penetrating through the peripheral wall of the housing 16 along the thickness direction of the peripheral wall is arranged in the vicinity of the peripheral wall of the housing 16 and in mirror symmetry around the annular part of the hollow part 1, the operation opening 18 is communicated with the hollow part 1, the hollow part 1 is a gap reserved between the front end wall of the shell 16 and the manual three-way switch valve 6, the manual three-way switch valve 6 is correspondingly adjacent to the hollow part 1 by a rotating handle 13, the operation opening 18 can be conveniently opened and closed by a human hand extending into the front part of the shell 16 through the manual three-way switch valve 6 by manually rotating the manual three-way switch valve 6 by the manual three-way switch valve 13, the opening and closing state of a corresponding port of the manual three-way switch valve 6 is controlled by the linear motor 5 by manually rotating the manual three-way switch valve 6 by the manual three-way switch valve, the front end of the linear motor 5 is fixedly connected with the rear end of a piston rod of the airtight syringe 9, the linear motor 5 reciprocates through the piston rod of the airtight syringe 9 by extending or retracting the telescopic shaft 5c thereof, and then drives the airtight syringe 9 to suck or discharge gas, the front end of the airtight syringe 9 is provided with a nipple 9d (namely, a pipe orifice communicated with the empty cylinder 9a is opened at the front end of the existing airtight syringe 9a, a piston 9b of the airtight injector 9 slides in the hollow cylinder 9a in a reciprocating manner along the length direction of the hollow cylinder 9a in a dynamic sealing manner to extract outside air into the hollow cylinder 9a through the pipe orifice or discharge the air in the hollow cylinder 9a to the outside through the pipe orifice), and is fixedly and hermetically communicated with a second air inlet/outlet port 14 of the manual three-way switch valve 6 through an air duct 8, a first air inlet/outlet pipe 2 and a second air inlet/outlet pipe 7 are symmetrically arranged by taking the manual three-way switch valve 6 as a central axis and respectively penetrate through the peripheral wall of the shell 16 along the thickness direction of the peripheral wall through a perforation arranged on the peripheral wall of the shell 16, respective inner pipe orifices of the first air inlet/outlet pipe 2 and the second air inlet/outlet pipe 7 are arranged in the shell 16, the outer ends of the respective pipe orifices are arranged outside the shell 16, the first air inlet/outlet pipe 2 of the manual three-way switch valve 6 is fixedly and hermetically communicated with the inner pipe orifice of the first air inlet/outlet pipe 2, a third air inlet/outlet 15 of the manual three-way switch valve 6 is fixedly and hermetically communicated with an inner end pipe orifice of the second air inlet/outlet pipe 7; the filler pads are divided into a first filler pad 17, a second filler pad 4 and a third filler pad 10, the first filler pad 17 being axially filled in pairs in the space between its wall and the airtight injector 9 inside the housing 16 to fix the airtight injector 9 inside the housing 16 in an axisymmetrical manner with respect to the airtight injector 9; the first filler pads 17 axially symmetrically fill the empty space provided between the peripheral wall of the housing 16 and the case front portion 5 in the airtight injector 9 with respect to the airtight injector 9, the airtight injector 9 is fixed to the peripheral wall of the housing 16 by the first filler pads 17 in such a manner as to be interposed between the two first filler pads 17, and the second filler pads 4 (constituted by fixed blocks of aluminum alloy) and the third filler pads 10 (constituted by plastic filler blocks) are respectively filled in pairs in the space between the case wall thereof and the linear motor 5 in the housing 16 to fix the case body of the linear motor 5 in the housing 16 in such a manner as to be axially symmetric with respect to the linear motor 5.

The linear motor 5 is a 57000 series through shaft linear stepping motor manufactured and sold by Haydon (HAYDON) company of America and having the model number of 57H4A-12V, a casing of the linear motor 5 is composed of a casing front part 5a and a casing rear part 5b, the casing front part 5a of the linear motor 5(57000 series linear stepping motor) is fixed with the casing rear part 5 at the right front part of the casing rear part 5b, the casing front part 5a and the casing rear part 5b are both cylindrical in shape, the axial length of the casing front part 5a is greater than that of the casing rear part 5b, the outer diameter of the casing front part 5a is significantly smaller than that of the casing rear part 5b, a telescopic shaft 5c in the linear motor 5 penetrates through the casing in the casing length direction, the front end of the telescopic shaft 5c extends from the casing front part 5a, and the rear end of the telescopic shaft 5c extends from the casing rear part 5 b.

The second filler pad 4 is axisymmetrically filled with respect to a case front portion 5a in the linear motor 5 in a vacant space provided between a peripheral wall of the case 16 and the case front portion 5a, and the case front portion 5a is fixed to an inner wall of the case 16 by the second filler pad 4 in such a manner as to be interposed between two second filler pads 4;

the third filling lining block 10 is axially symmetrically filled in a vacant position which is arranged in the shell 16 and is positioned right behind the shell of the linear motor 5 relative to the telescopic shaft 5c in the linear motor 5, the rear end wall of the shell 16 is pressed and contacted on the rear end wall of the shell of the linear motor 5 through the third filling lining block 10, the rear end of the telescopic shaft 5c extending out of the rear part of the shell of the linear motor 5 is in clearance fit with the third filling lining block 10, the telescopic shaft 5c can conveniently and axially reciprocate along the linear motor 5, the third filling lining block 10 and the second filling lining block 4 limit, clamp and fix the rear part 5b of the shell in the shell 16, and the air duct 8 is internally provided with a pressure sensor 3 which is fixed on the inner surface of the peripheral wall of the air duct 8 to measure the pressure of the air flowing through the air duct 8.

The air duct 8 is essentially a pipe diameter conversion communicating pipe/reducing pipe, and because the pipe diameter of the nipple 9d of the airtight injector 9 is not matched with the pipe diameter of the second air inlet/outlet 14 of the manual three-way switch valve 6, the pipe diameter conversion communicating pipe/reducing pipe is needed to be adopted to match, fix and seal the nipple 9d of the airtight injector 9 and the second air inlet/outlet 14 of the manual three-way switch valve 6, namely: the inner diameter of the rear end orifice of the pipe diameter conversion communication pipe/reducing pipe is matched with the outer diameter of the nipple 9d (the rear end orifice of the pipe diameter conversion communication pipe/reducing pipe is fixedly and hermetically sleeved on the nipple 9 d), and the outer diameter of the front end orifice of the pipe diameter conversion communication pipe/reducing pipe is matched with the inner diameter of the second air inlet/outlet 14 (the second air inlet/outlet 14 is fixedly and hermetically sleeved on the front end orifice of the pipe diameter conversion communication pipe/reducing pipe).

The utility model discloses need and arrange in the cooperation of the lithium cell outside its casing 16, chip type electronic signal processor, current reversing switch, portable notebook computer etc. and use.

Before the pressure sensor 3 is arranged in a valve cavity of a manual three-way switch valve 6 and the air guide tube 8 is matched and connected with a nipple 9d of an airtight injector 9, a threading hole penetrating through the peripheral wall of the air guide tube 8 towards the thickness direction of the peripheral wall of the rear end of the air guide tube 8 is arranged on the peripheral wall of the air guide tube 8, the aperture of the threading hole is obviously smaller than the minimum radial dimension of the pressure sensor 3, then the pressure sensor 3 is fixed on an annular part close to the inner surface of the peripheral wall of the air guide tube 8 and surrounding an inner end orifice of the threading hole (an orifice at one end of the threading hole close to the inner surface of the peripheral wall of the air guide tube 8), the rear end face of a leading-out insulated conducting wire (the insulated signal sending wire and the insulated power supply wire) of the pressure sensor 3 is sealed against the inner end orifice of the threading hole, and then the insulated signal sending wire and the insulated power supply wire penetrate out of the air guide tube 8 from the air guide tube 8 along the radial direction of the air guide tube 8 through the threading hole, scribble the insulating soldering tin connection position of marginal signal transmission line and insulating power supply line and pressure sensor 3 rear end face to waterproof sealant on the surface, keep soldering tin connection position can not leak because of the liquid drop that congeals into among the accidental contact gas, and, put into the through wires hole with waterproof sealant, make waterproof sealant fill the space that lies in between insulating wire and the inner peripheral surface, with thorough airtight through wires hole, prevent to flow through air duct 8 or static gas in air duct 8 and leak out through the through wires hole, avoid the gas pressure numerical value that pressure sensor 3 measured to appear the deviation, be convenient for use the utility model discloses before with stretch out in the insulating wire the end outside air duct 8 correspond wired cooperation electricity and connect electronic signal processor and DC power supply (lithium cell). In addition, the rear end face of the pressure sensor 3 is firmly fixed on the inner surface of the air duct 8 at an annular part which is adjacent to the surrounding threading hole through sealant.

The chip-type electronic signal processor is a single chip Microcomputer (MCU)/Microcontroller (model STC12C5616AD-35I-QFP32) manufactured by Hongzhen Macro science and technology Limited and provided with a signal output end (I for outputting an electric signal)²Interface C) is connected with a corresponding signal receiving pin of an electronic signal processor in a wired mode through an insulated signal transmitting line, the signal transmitting pin of the electronic signal processor is electrically connected with a USB female interface of the portable notebook computer in a wired mode through a USB-COM chip/RS 232-USB interface converter (the type is PL2303 or PL2302 which is commercially available from Prolific corporation of Taiwan), a direct-current power supply is a lithium battery, and the lithium battery is divided into a first lithium battery and a second lithium battery and consists of the first lithium battery with the power supply voltage of 3.0V and the second lithium battery with the power supply voltage of 12.0V.

The utility model discloses need and arrange in the cooperation of lithium cell outside its casing, chip type electronic signal processor, current reversing switch, portable notebook computer etc. and use. The utility model discloses a pressure sensor 3, linear electric motor 5 and lithium cell, chip type electronic signal processor, current reversing switch, portable notebook computer's circuit matching connection relation as follows: the electrode of the first lithium battery is in wired electric connection with the power input end of the pressure sensor 3 and the respective power signal input pin of the electronic signal processor (singlechip) through an insulated power supply wire, the USB female interface of the portable notebook computer is in wired electric connection with the signal sending pin of the electronic signal processor (singlechip) through an RS232-USB interface converter, and the signal receiving pin of the electronic signal processor is in wired electric connection with the signal output end of the pressure sensor 3 through an insulated signal sending wire; the first lithium battery supplies the pressure sensor 3 with its required electrical energy through an insulated power supply line and supplies the electronic signal processor with operating electrical energy through an insulated conductor. The electrode of the second lithium battery is electrically connected with the power input end of the linear motor 5 through an insulated weak current lead and a current reversing switch in a wired mode, the current reversing switch is a fireproof boat-shaped switch, the current reversing switch is commercially available in an electronics factory (a factory with four electronic accessories in the rainbow bridge in the city of the le) and is 308A or KCD4 in model, the second lithium battery provides driving power for the linear motor 5, the forward and reverse rotation of a built-in rotor of the linear motor 5 can be realized through manually operating the current reversing switch, and then the corresponding forward movement or backward movement of the telescopic shaft 5c is realized.

The manual three-way switch valve 6 is a manual three-way ball valve which is commercially available from the American swagelok company and has the model number of SS-42GXS 4; the airtight syringe 9 (airtight injector) was custom-made commercially available from Shanghai glass pigeon industry Co., Ltd and was of a 50ml series model; the linear motor 5 is commercially available from HAYDON of America and has the model number of 57H 4A-12V; the pressure sensor 3 is commercially available from TE Connectivity ltd, and is of the type MS5837-30 BA; the first lithium battery is commercially available from Fuzhen YuanLai energy Co., Ltd and has the model CR123A, the nominal output direct-current voltage is 3.0V, the second lithium battery is commercially available from Shenzhen Dingshi science and technology Co., Ltd and has the model 18650-3S, and the nominal output direct-current voltage is 12.0V.

The utility model discloses before being used, should additionally prepare portable notebook computer, first lithium cell, second lithium cell, current reversing switch, singlechip (model: STC12C5616AD-35I-QFP32), current reversing switch, the insulating weak current wire that length is fit for etc. earlier, according to the utility model discloses a pressure sensor 3, linear electric motor 5 and lithium cell, chip type electronic signal processor, current reversing switch, portable notebook computer's circuit matching connection relation reliably connect, start portable notebook computer, through the computer debugging, confirm that it can effective communication each other with the singlechip. The utility model discloses an operation sample flow does:

manually opening a manual valve which is arranged on a tank opening of a first storage tank and used for opening and closing the tank opening of the first storage tank in advance, fixedly and hermetically communicating an outer end pipe orifice of a first air inlet/outlet pipe 2 of a manual three-way switch valve 6 with the tank opening of the first storage tank through a manual valve cavity which opens the tank opening of the first storage tank and a first air guide hose, manually opening a manual valve which is arranged on a tank opening of a second storage tank and used for opening and closing the tank opening of the second storage tank in advance, and fixedly and hermetically communicating an outer end pipe orifice of a second air inlet/outlet pipe 7 of the manual three-way switch valve 6 with the tank opening of the second storage tank through a manual valve cavity which opens the tank opening of the second storage tank and a tank opening of the second storage tank through a second air guide hose; secondly, a hand extends into the hollow part 1 through the operation opening 18, a rotating handle 13 of the manual three-way switch valve 6 is rotated towards corresponding direction, the first air inlet/outlet pipe 12 and the second air inlet/outlet pipe 14 are opened, the third air inlet/outlet pipe 15 is closed, the first gas storage tank is communicated with the air guide pipe 8 through the first air guide hose, the first air inlet/outlet pipe 2 and the manual three-way switch valve 6, the telescopic shaft 5c of the direct current motor 5 is driven to move backwards through the manually operated current reversing switch, a piston rod 9c (made of corrosion-resistant stainless steel materials) and a piston 9b (made of polytetrafluoroethylene/PTFE) of the airtight injector 9 correspondingly move backwards, and the sample gas in the first gas storage tank sequentially passes through the first air inlet/outlet pipe in a strong negative pressure state (the vacuum degree in the hollow cylinder 9a is greater than the vacuum degree in the first storage tank) formed by the volume expansion sealed in the hollow cylinder 9a (made of high borosilicate glass material) of the airtight injector 9 The air outlet pipe 2, the valve cavity of the manual three-way switch valve 6, the air duct 8 and the nipple 9d of the airtight injector 9 are continuously pumped into the hollow cylinder 9a, the pressure sensor 3 fixedly arranged in the valve cavity of the manual three-way switch valve 6 sends the sensed pressure digital signal to the computer through the singlechip, and the computer converts the pressure digital signal into a pressure numerical value which can be read by naked eyes and displays the pressure numerical value on the display screen; when the pressure value observed by naked eyes is reduced to the minimum stable target value, the telescopic shaft 5c of the direct current motor 5 stops moving backwards through manually operating the current reversing switch, the piston rod 9c and the piston 9b of the airtight syringe 9 correspondingly stop moving backwards, at the same time, the piston 9b is stationary at a position close to but not in contact with the rear end wall of the hollow cylinder 9a, to prevent the telescopic shaft 5c of the linear motor 4, the piston 9b and the rear end shell wall of the hollow cylinder 9a from being damaged by extrusion deformation, extend the hand into the hollow part 1 through the operation opening 18, by turning the stem 13 in the respective direction of rotation, the first inlet/outlet port 12 and the third inlet/outlet port 15 are closed and/or the second inlet/outlet port 14 is closed, and, manually close the manual valve installed on jar mouth of the first storage jar, guarantee to be pumped and flowed to the sample gas in the empty tube 9a and keep the quantitative storage of pressure; thirdly, by rotating the rotating handle 13 towards the corresponding direction, the second air inlet/outlet port 14 and the third air inlet/outlet port 15 are opened and the first air inlet/outlet port 12 is closed, so that the second gas storage tank is communicated with the air duct 8 through the second air guide hose, the second air inlet/outlet pipe 7 and the manual three-way switch valve 6, the telescopic shaft of the direct current motor 5 is driven to move forwards through the manually operated current reversing switch, the piston rod 9c and the piston 9b of the airtight injector 9 correspondingly move forwards, the sample gas in the empty cylinder 9a is continuously pressed and flows into the second gas storage tank through the nipple 9d of the airtight injector 9, the air duct 8, the valve cavity of the manual three-way switch valve 6, the second air inlet/outlet pipe 7 and the second air guide hose in sequence under the strong positive pressure state formed by the reduction of the sealed volume in the empty cylinder 9a of the airtight injector 9 (the vacuum degree in the empty cylinder 9a is smaller than the vacuum degree in, the pressure sensor 3 fixedly arranged in the valve cavity of the manual three-way switch valve 6 sends the sensed pressure digital signal to the computer through the singlechip, and the computer converts the pressure digital signal into a pressure numerical value readable by naked eyes and displays the numerical value on a display screen of the computer; when the pressure value observed by naked eyes is increased to the maximum stable target value, the telescopic shaft 5c of the direct current motor 5 is stopped to move forwards by manually operating the current reversing switch, the piston rod 9c and the piston 9b of the airtight syringe 9 are correspondingly stopped to move forwards, at the same time, the piston 9b is stationary at a position close to but not in contact with the wall of the front end of the hollow cylinder 9a where the nipple 9d is opened, so as to prevent the telescopic shaft 5c of the linear motor 4, the piston 9b and the front end shell wall of the hollow cylinder 9a from being damaged by extrusion deformation, extend the hand into the hollow part 1 through the operation opening 18, by turning the stem 13 in the respective direction of rotation, the third inlet/outlet port 15, the second inlet/outlet port 14 and the first inlet/outlet port 12 are closed, and manually closing a manual valve arranged on the tank opening of the second storage tank to ensure the sample gas pumped and flowed into the second gas storage tank to be stored in a constant quantity under the condition of pressure maintaining; at this point, the complete gas sampling process is complete.

The utility model discloses a key core device in the casing constitutes the explanation: (1) manual three-way switching valve 6: for gas circuit switching, the on/off state of the gas inlet/outlet of the manual three-way switch valve 6 comprises: keeping the first inlet/outlet port 12 and the second inlet/outlet port 14 open and the third inlet/outlet port 15 closed, keeping the first inlet/outlet port 12 and the third inlet/outlet port 15 closed, keeping the second inlet/outlet port 14 and the third inlet/outlet port 15 open and the first inlet/outlet port 12 closed, keeping the third inlet/outlet port 15, the second inlet/outlet port 14 and the first inlet/outlet port 12 closed, (2) the airtight injector 9: the second gas storage tank is used for extracting a gas source in the first gas storage tank, adjusting the gas pressure and pushing the gas to be used as a target container; (3) the linear motor 5: the piston rod is used for driving the airtight syringe to move back and forth; (4) the pressure sensor 3: the pressure sensor is used for sending the sensed pressure value of the sample gas to a computer through a single chip microcomputer, when a first gas inlet/outlet 12 of the manual three-way switch valve 6 is communicated with a gas source, the pressure sensor correspondingly detects the pressure transmitted by the gas source, and when a third gas inlet/outlet 15 of the manual three-way switch valve 6 is communicated with a target container, the pressure sensor correspondingly detects the pressure transmitted by the target container.

The utility model discloses the sealing performance of gas circuit structure detects: deposit in proper amount gas earlier in airtight syringe 9's empty section of thick bamboo 9a, then, will the utility model discloses a first gas inlet/outlet 12 and third gas inlet/outlet 15 shutoff promote the syringe, make the gas in the gas circuit be in the malleation state, at this moment, adopt the soap lye to detect interface sealing performance between nipple 9d and the air duct 8 and the interface sealing performance between air duct 8 and manual three way switch valve 6's the second gas inlet/outlet 14, ensure that all interface sealing performance is qualified.

The utility model discloses the notice before being used: and (3) detecting the humidity of the negative pressure air source to be collected: adopt the hygrometer to detect the humidity of waiting to gather the air supply to set up suitable target pressure value during the sample, prevent that steam from being brought into by the air current at the condensation state the utility model discloses in and the target container, avoid its true composition that changes gas sample then.

The utility model discloses a user can calculate according to linear electric motor's thrust, the cross sectional area and the pressure-bearing limit of syringe the utility model discloses the target atmospheric pressure extreme value that interior gas circuit can bear.

The utility model discloses a main characteristic technical essential has: (1) can convert negative pressure gas into positive pressure gas: through the utility model discloses gather the negative pressure air supply, can convert the negative pressure air supply to positive pressure air supply storage under the condition of not destroying original sample, make things convenient for the gaseous analysis of follow-up sample. (2) The portability is better: the total weight is less than 2kg, the whole structure is small and compact, the occupied space is small, and the portable cleaning machine is convenient to carry and clean; (3) the field adaptability is strong; the utility model can be powered by lithium battery, and the battery can be replaced when the power supply is insufficient; (4) the cross contamination caused by the air source conversion process is very little.

Claims

1. A gas sampling supercharging device which characterized in that: comprises a shell (16), a handle (11), an airtight injector (9), a manual three-way switch valve (6), a first air inlet/outlet pipe (2), a second air inlet/outlet pipe (7), a linear motor (5), a pressure sensor (3), an air duct (8) and a filling filler block; three openings have been seted up to manual three way switch valve (6) self: a first air inlet/outlet (12), a second air inlet/outlet (14) and a third air inlet/outlet (15), wherein the shell (16) is cylindrical and is made of aluminum alloy plates, the manual three-way switch valve (6) respectively and correspondingly opens or closes the first air inlet/outlet (12), the second air inlet/outlet (14) and the third air inlet/outlet (15) by driving the valve core positioned in the valve cavity to move, a handle (11) is fixedly arranged at the front end of the shell (16), the linear motor (5), the airtight injector (9), the air duct (8), the manual three-way switch valve (6) and the hollow part (1) are sequentially and fixedly arranged in the shell (16) towards the direction from the rear end to the front end of the shell (16), and an operation opening (18) penetrating through the peripheral wall of the shell (16) along the thickness direction of the peripheral wall of the shell (16) is arranged on the annular part adjacent to and surrounding the hollow part (1) of the peripheral wall of the shell (16) in a mirror symmetry manner, the operation opening (18) is communicated with the hollow part (1), the hollow part (1) is a gap reserved between the front end wall of the shell (16) and the manual three-way switch valve (6), the manual three-way switch valve (6) is correspondingly adjacent to the hollow part (1) through a rotating handle (13) arranged on the manual three-way switch valve (6), the operation opening (18) can be opened to facilitate a hand to stretch into the front part of the shell (16) through the manual three-way switch valve (6) to control the opening and closing state of a corresponding opening of the manual three-way switch valve (6) through manually rotating the rotating handle (13) arranged on the manual three-way switch valve (6), the front end of a telescopic shaft arranged on the linear motor (5) is fixedly connected with the rear end of a piston rod arranged on the airtight injector (9), the linear motor (5) reciprocates through the piston rod of the airtight injector (9) in a mode of stretching out or retracting the telescopic shaft of the linear motor to drive the airtight injector (9) to suck or exhaust gas, and the front end of the airtight injector (9) is fixedly communicated with the manual three-way through a nipple (8) in a sealing mode A second air inlet/outlet (14) communicated with the switch valve (6), a first air inlet/outlet pipe (2) and a second air inlet/outlet pipe (7) are symmetrically arranged by taking the manual three-way switch valve (6) as a central shaft, and respectively penetrate through the peripheral wall of the shell (16) along the thickness direction of the peripheral wall through a perforation arranged on the peripheral wall of the shell (16), the inner pipe orifices of the first air inlet/outlet pipe (2) and the second air inlet/outlet pipe (7) are arranged in the shell (16), the outer pipe orifices of the first air inlet/outlet pipe are arranged outside the shell (16), the first air inlet/outlet pipe (2) of the manual three-way switch valve (6) is fixedly and hermetically communicated with the inner pipe orifice of the first air inlet/outlet pipe (2), and the third air inlet/outlet (15) of the manual three-way switch valve (6) is fixedly and hermetically communicated with the inner pipe orifice of the second air inlet/outlet pipe (7); the filler pads are divided into a first filler pad (17), a second filler pad (4) and a third filler pad (10), the first filler pad (17) being axially filled in pairs in the space between its housing wall and the airtight injector (9) in the housing (16) to fix the airtight injector (9) in the housing (16) in an axisymmetric manner with respect to the airtight injector (9); the first filler pads (17) axially symmetrically fill the empty space between the peripheral wall of the housing (16) and the housing front part (5) in the airtight injector (9) relative to the airtight injector (9), the airtight injector (9) is fixed together with the peripheral wall of the housing (16) by the first filler pads (17) in a manner of being interposed between the two first filler pads (17), and the second filler pads (4) and the third filler pads (10) are respectively filled in pairs in the space between the housing wall of the housing (16) and the linear motor (5) to fix the housing body of the linear motor (5) in the housing (16) in an axially symmetric manner relative to the linear motor (5).