CN217180955U - Auxiliary sample introduction device of analytical instrument - Google Patents
Auxiliary sample introduction device of analytical instrument Download PDFInfo
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- CN217180955U CN217180955U CN202123409223.8U CN202123409223U CN217180955U CN 217180955 U CN217180955 U CN 217180955U CN 202123409223 U CN202123409223 U CN 202123409223U CN 217180955 U CN217180955 U CN 217180955U
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Abstract
The utility model discloses an analytical instrument assists sampling device, including the sampling valve structure, the sample advances a structure, heat desorption cavity structure, advance appearance interface and control assembly, heat desorption cavity structure includes bushing pipe and furnace chamber heating structure, it adds interface heating structure to advance to be provided with between appearance interface and the heat desorption cavity structure, the sampling valve structure includes sampling valve and sampling valve heating structure, interface heating structure is provided with interface heat preservation box outward, sampling valve heating structure is provided with sampling valve heat preservation box outward, control assembly is used for controlling furnace chamber heating structure respectively, interface heating structure, sampling valve heating structure's temperature and be used for controlling the sampling valve and be in different operating condition. The utility model discloses an auxiliary sampling device of analytical instrument through setting up furnace chamber heating structure, interface heating structure, sampling valve heating structure and control assembly respectively, heats each structure of auxiliary sampling device and keeps warm, realizes full automatic control temperature and reduction temperature attenuation degree.
Description
Technical Field
The utility model relates to a chromatogram, mass spectrometry technical field especially relate to an analytical instrument assists sampling device.
Background
In the instrument analysis, the sample content, the sample composition, the sample state, the analysis purpose, the analysis requirement and the like have different requirements on a sample introduction system. Common sample injection systems comprise an automatic sample injector, a thermal desorption instrument, a headspace device, a thermal analyzer, a thermal cracker and the like, the temperature of a transmission line of the existing auxiliary sample injection system is set to be low and cannot reach higher temperature, and condensation is easy to generate when semi-volatile substances and substances with higher boiling points are tested; some sampling systems do not set up heat preservation heat-proof device, and the sample can appear condensing when flowing to low temperature by high temperature, adheres to on the bushing pipe or kneck, and is difficult to wash, consequently can produce the residual phenomenon. Some sample injectors are far away from the sample inlet of the instrument, and the temperature is attenuated quickly. Therefore, it is necessary to design a new system to realize a sample injection device capable of fully automatically controlling the temperature and reducing the temperature attenuation degree.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to prior art's weak point, provide an analytical instrument auxiliary sampling device, can realize full automatic control temperature and reduce temperature attenuation degree.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an auxiliary sample introduction device of an analytical instrument comprises a fixed base, wherein a sample introduction valve structure, a sample introduction structure, a thermal desorption cavity structure, a sample introduction interface and a control assembly are arranged on the fixed base, the sample introduction structure, the thermal desorption cavity structure and the sample introduction interface are sequentially arranged from top to bottom, the sample introduction valve structure is arranged on the left side or the right side of the thermal desorption cavity structure, the sample introduction valve structure is connected with the sample introduction interface and the thermal desorption cavity structure through a transmission line, the thermal desorption cavity structure comprises a cavity structure, the cavity structure comprises a liner tube and a cavity heating structure for heating the liner tube, an interface heating structure is arranged between the sample introduction interface and the thermal desorption cavity structure, the sample introduction valve structure comprises a sample introduction valve and a sample introduction valve heating structure fixed on the sample introduction valve, the interface heating structure is provided with the interface heat preservation box outward, the sampling valve heating structure is provided with the sampling valve heat preservation box outward, control assembly is used for controlling respectively furnace chamber heating structure interface heating structure the sampling valve heating structure's temperature and be used for control the sampling valve is in different operating condition with control supplementary sampling device is in different states. Through setting up furnace chamber heating structure, interface heating structure, sampling valve heating structure and control assembly respectively, the cooperation sets up interface heat preservation box and sampling valve heat preservation box, has carried out heating heat preservation to each structure of supplementary sampling device to can realize full automatic control temperature and reduce the temperature attenuation degree.
In the above technical scheme, preferably, the interface heat preservation box and the sample injection valve heat preservation box are both provided with heat insulation cotton. The arrangement of the heat insulation cotton further ensures the heat insulation effect.
Among the above-mentioned technical scheme, further preferably, the sample advances a kind structure and includes clamping ring, clamping ring nut, handle, fixation nut, advances appearance pipe, sample boat and first sealing washer, the handle cover is established advance the upper portion of appearance pipe, the clamping ring set up in advance the upper end of appearance pipe and stretch into in the handle, the clamping ring nut cover is established the upper portion of handle, the fixation nut cover is established the lower part of handle, first sealing washer is located advance the appearance pipe with between the handle, the sample boat place in the appearance pipe, the sample boat is used for holding the sample. Wherein, first sealing washer is used for fixed sample tube and sealing action, and sample tube can be extracted from and insert.
In the above technical solution, it is further preferred that the thermal desorption chamber structure further comprises a chamber upper end fixing structure disposed at the upper end of the liner tube and a chamber lower end fixing structure disposed at the lower end of the liner tube, the chamber upper end fixing structure comprises a gas carrying pipe, a sealing pressure plate, a fixing plate, a second sealing ring and a third sealing ring, the fixing plate and the sealing pressure plate are disposed at the upper end of the liner tube, the fixing plate is sleeved on the liner tube, the second sealing ring is disposed between the fixing plate and the liner tube, the sealing pressure plate is sleeved on the fixing plate and press-fitted at the upper end of the liner tube, the third sealing ring is disposed between the sealing pressure plate and the liner tube, the gas carrying pipe is disposed on the sealing pressure plate, the chamber lower end fixing structure comprises a chamber fixing flange, a fourth sealing ring and a sealing flange, the chamber fixing flange is sleeved on the liner tube, the sealing flange sleeve is established the lower extreme of bushing pipe, the fourth sealing washer set up in the bushing pipe with between the furnace chamber mounting flange, the sealing flange is used for compressing tightly the fourth sealing washer. Wherein, sealed pressure disk is used for compressing tightly the third sealing washer, and second sealing washer and third sealing washer are used for sealed furnace chamber structure upper end, and sealing flange is used for compressing tightly the fourth sealing washer, and the fourth sealing washer is used for sealed furnace chamber structure lower extreme. The furnace chamber heating structure can be made of ceramic, stainless steel, aluminum and other materials, and the liner tube can be an inerting quartz tube or an inerting stainless steel tube.
In the above technical solution, it is still further preferable that the fixing structure at the upper end of the furnace chamber is connected with the fixing structure at the lower end of the furnace chamber by a thermal desorption chamber support.
Among the above-mentioned technical scheme, still further preferably, the appearance interface of advancing includes and advances a kind flange, advance a kind nut, advance a kind needle and fifth seal ring, advance a kind needle and be used for being connected with analytical instrument's appearance interface.
In the above technical solution, and further preferably, the sample introduction flange and the furnace chamber fixing flange are respectively fixed on the interface heat preservation box.
In the above technical solution, it is further preferred that the injection valve structure further includes a cylinder, an injection rod and a fixing ring, the injection rod connects the injection valve with the cylinder, and the fixing ring is fixed on the injection rod and mounted on the injection valve heat preservation box. The sampling valve heating structure can be made of ceramic, stainless steel, aluminum and other materials; the sample injection valve can be a six-way valve, an eight-way valve, a ten-way valve and other sample injection valves capable of changing flow paths. The cylinder can also be a stepping rotating motor.
In the above technical solution, it is still further preferred that the interface heating structure, the furnace chamber heating structure, and the injection valve heating structure are respectively provided with a heater fixing hole and a temperature sensor fixing hole. Wherein, the heater can be a heating rod or a heating wire; the temperature sensor can be a thermocouple or a thermal resistor.
In the above technical solution, still further preferably, the first to fifth sealing rings are graphite gaskets, metal pressure rings, high temperature resistant fluorine rubber rings, or high temperature resistant silicon rubber rings.
The utility model discloses an auxiliary sample introduction device of analytical instrument has following beneficial effect:
1. through setting up furnace chamber heating structure, interface heating structure, sampling valve heating structure and control assembly respectively, the cooperation sets up interface heat preservation box and sampling valve heat preservation box, has carried out heating heat preservation to each structure of supplementary sampling device to can realize full automatic control temperature and reduce the temperature attenuation degree.
2. Through set up corresponding sealing washer at injection valve structure, sample introduction structure, heat desorption chamber structure, appearance interface, the gas leakage phenomenon can not appear in the instrument and can make the work of auxiliary sample introduction system at higher temperature.
Drawings
FIG. 1 is a schematic structural diagram of an auxiliary sample injection device of the analytical instrument according to the present embodiment;
FIG. 2 is a schematic view of an internal structure of an auxiliary sample injection device of the analysis instrument according to the present embodiment;
FIG. 3 is a schematic structural diagram of the thermal desorption cavity structure and the sample injection interface of the auxiliary sample injection device of the analysis instrument according to the present embodiment;
FIG. 4 is a schematic structural diagram of a sample injection structure in an auxiliary sample injection device of the analysis instrument according to the present embodiment;
FIG. 5 is a schematic structural diagram of a thermal desorption cavity structure in an auxiliary sample injection device of the analyzer according to the embodiment;
FIG. 6 is a schematic structural diagram of a sample inlet interface of the auxiliary sample injection device of the analysis instrument in this embodiment;
FIG. 7 is a schematic structural diagram of a furnace chamber structure in an auxiliary sample introduction device of an analytical instrument according to this embodiment;
fig. 8 is a schematic structural diagram of a sample injection valve structure in an auxiliary sample injection device of an analysis instrument according to this embodiment.
In the figure: -a housing-100; a stationary base-110; a sample injection structure-200; a compression ring-210; a compression ring nut-220; a handle-230; a fixing nut-240; a sample inlet pipe-250; sample boat-260; a first seal ring-270; a furnace chamber upper end fixing structure-310; a carrier gas pipe-311; a sealing platen-312; a stationary pan-313; a second seal-ring-314; a third seal ring-315; a furnace chamber lower end fixing structure-320; an oven cavity fixing flange-321; a fourth seal ring-322; a sealing flange-323; a furnace chamber structure-330; a liner-331; oven cavity heater fixing hole-332; a heating hole-333 of a furnace chamber temperature sensor; thermal desorption chamber support-340; a sample introduction interface-400; a sample injection flange-410; a sample injection screw cap-420; a sample injection needle-430; a fifth sealing gasket-440; interface heating structure-450; interface heater fixing hole-451; interface temperature sensor mounting holes-452; interface insulation box-460; a cylinder-510; a sample injection rod-520; a stationary ring-530; a sample injection valve-540; a sample injection valve heating structure-550; and a sample injection valve heat preservation box-560.
Detailed Description
Example (b): referring to fig. 1 to 8, an auxiliary sample injection device for an analytical instrument includes a housing 100 and a fixing base 110, wherein a sample injection valve structure, a sample injection structure 200, a thermal desorption cavity structure, a sample injection interface 400 and a control component are arranged on the fixing base 110, the sample injection structure 200, the thermal desorption cavity structure and the sample injection interface 400 are sequentially arranged from top to bottom, and the sample injection valve structure is arranged on the left side or the right side of the thermal desorption cavity structure.
The thermal desorption cavity structure comprises a furnace cavity structure 330, a furnace cavity upper end fixing structure 310 arranged at the upper end of the furnace cavity structure 330 and a furnace cavity lower end fixing structure 320 arranged at the lower end of the furnace cavity structure 330, wherein the furnace cavity upper end fixing structure 310 comprises a gas carrying pipe 311, a sealing pressure plate 312, a fixed disc 313, a second sealing ring 314 and a third sealing ring 315, the furnace cavity structure 330 comprises a liner pipe 331 and a furnace cavity heating structure for heating the liner pipe 331, the fixed disc 313 and the sealing pressure plate 312 are arranged at the upper end of the liner pipe 331, specifically, the fixed disc 313 is sleeved on the liner pipe 331, the second sealing ring 314 is arranged between the fixed disc 313 and the liner pipe 331, the sealing pressure plate 312 is sleeved on the fixed disc 313 and is pressed on the upper end of the liner pipe 331, the third sealing ring 315 is arranged between the sealing pressure plate 312 and the liner pipe 331, the gas carrying pipe 311 is welded on the sealing pressure plate 312, and the furnace cavity lower end fixing structure 320 comprises a furnace cavity fixing flange 321, a third sealing flange 321, The furnace chamber fixing flange 321 is sleeved on the liner tube 331, the sealing flange 323 is sleeved at the lower end of the liner tube 331, the fourth sealing ring 322 is arranged between the liner tube 331 and the furnace chamber fixing flange 321, and the sealing flange 323 is used for pressing the fourth sealing ring 322. The sealing platen 312 is used for pressing the third sealing ring 315, the second sealing ring 314 and the third sealing ring 315 are used for sealing the upper end of the furnace chamber structure 330, the sealing flange 323 is used for pressing the fourth sealing ring 322, and the fourth sealing ring 322 is used for sealing the lower end of the furnace chamber structure 330. The furnace chamber heating structure can be made of ceramic, stainless steel, aluminum and the like, and the liner tube 331 can be an inerting quartz tube or an inerting stainless steel tube. In addition, the oven cavity upper end fixing structure 310 and the oven cavity lower end fixing structure 320 are connected by a thermal desorption cavity support 340.
The sample inlet interface 400 includes a sample flange 410, a sample nut 420, a sample needle 430, and a fifth sealing gasket 440, where the sample needle 430 is used to connect with a sample inlet of the analysis instrument. In addition, an interface heating structure 450 is disposed between the sample inlet interface 400 and the thermal desorption cavity structure, specifically, the interface heating structure 450 is fixed on the fixing structure 320 at the lower end of the cavity and the sample inlet flange 410, the interface heating structure 450 may be made of ceramic, stainless steel, aluminum, etc., and an interface heat preservation box 460 is disposed outside the interface heating structure 450. And the sample introduction flange 410 and the furnace chamber fixing flange 321 are respectively fixed on the interface heat preservation box 460. The interface heat preservation box 460 is internally provided with heat insulation cotton.
The sample injection valve structure comprises an air cylinder 510, a sample injection rod 520, a fixing ring 530, a sample injection valve 540 and a sample injection valve heating structure 550, a sample injection valve heat preservation box 560 is arranged outside the sample injection valve 540 and the sample injection valve heating structure 550, and heat insulation cotton is arranged in the sample injection valve heat preservation box 560. The sample injection valve 540 is connected with the cylinder 510 by the sample injection rod 520, the fixing ring 530 is fixed on the sample injection rod 520 and is installed on the sample injection valve heat preservation box 560, and the sample injection valve heating structure 550 is fixed on the sample injection valve 540. Wherein, the injection valve heating structure 550 can be made of ceramic, stainless steel, aluminum, etc.; the sample injection valve 540 can be a six-way valve, an eight-way valve, a ten-way valve, or other sample injection valves capable of changing flow paths; the air cylinder 540 may also be a step rotating motor.
In addition, the interface heating structure 450 is provided with an interface heater fixing hole 451 and an interface temperature sensor fixing hole 452, the furnace chamber heating structure is provided with a furnace chamber heater fixing hole 332 and a furnace chamber temperature sensor fixing hole 332, and the injection valve heating structure 550 is provided with an injection valve heater fixing hole 551 and an injection valve temperature sensor fixing hole 552; the heaters can be heating rods and heating wires; the temperature sensors may be thermocouples or thermal resistors.
The first, second, third, fourth and fifth sealing rings 270, 314, 315, 322 and 450 are graphite gaskets, metal press rings, refractory fluorine rubber rings or refractory silica rubber rings.
And the thermal desorption cavity structure and the sample injection valve structure are connected through transmission lines, and the sample injection valve structure and the sample injection interface 400 are connected through transmission lines, wherein the transmission lines are inert stainless steel tubes.
In addition, the auxiliary sample introduction device of the analysis instrument further comprises a control assembly, and the control assembly comprises a control circuit board, a furnace chamber heater, a sample introduction valve heater, an interface heater, a furnace chamber temperature sensor, a sample introduction valve temperature sensor, an interface temperature sensor, a first electromagnetic valve, a second electromagnetic valve, a two-position five-way electromagnetic valve, a pressure reducing valve, a throttle valve, a pressure gauge, a display screen, a power supply and a filter. The furnace chamber heater, the sampling valve heater, the interface heater, the furnace chamber temperature sensor, the sampling valve temperature sensor, the interface temperature sensor, the first electromagnetic valve, the second electromagnetic valve and the two-position five-way electromagnetic valve are connected with the circuit board through wires. The first electromagnetic valve and the second electromagnetic valve are connected with the sample injection valve through a gas circuit. The two-position five-way electromagnetic valve is connected with the cylinder through an air path. The circuit board is connected with a power supply.
The display screen is connected with the circuit board and used for editing the control logic of the sample feeding device and displaying the real-time state of the sample feeding device. The pressure stabilizing valve is used for adjusting the sample introduction pressure; the pressure gauge is used for displaying sample introduction pressure; the throttle valve is used to control the gas flow.
The circuit board is internally provided with a control program which respectively controls the temperature of the interface heating structure 450, the furnace chamber heating structure and the sampling valve heating structure 550 and the on-off state of the first electromagnetic valve, the second electromagnetic valve and the two-position five-way electromagnetic valve; different control logics are used for realizing that the sampling valve is in different working states, so that the sampling device is in different states. The working state of the sample injection device mainly comprises five states of purging, resolving, sample injection, cleaning and cooling.
When the sample introduction device is in a sample introduction state, the sample carrier gas introduces the gasified sample into the sample introduction port of the analyzer through the sample introduction needle 430, and the circuit board sends out a trigger signal to trigger the analyzer to start analysis. The analyzer can be a gas chromatograph, a gas chromatograph-mass spectrometer or a mass spectrometer.
The auxiliary sample introduction device of the analysis instrument of this embodiment is through setting up furnace chamber heating structure respectively on the one hand, interface heating structure, sampling valve heating structure and control assembly, the cooperation sets up interface heat preservation box and sampling valve heat preservation box, each structure of auxiliary sample introduction device has carried out heating heat preservation, thereby can realize full automatic control temperature and reduce the temperature attenuation degree, on the other hand is through at the sampling valve structure, the sample advances a kind structure, heat desorption chamber structure, the sampling interface sets up corresponding sealing washer, gas leakage phenomenon instrument performance can not appear in the instrument and is ensured and can make auxiliary sample introduction system work at higher temperature.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, so as not to limit the protection scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.
Claims (10)
1. An auxiliary sample introduction device of an analytical instrument is characterized by comprising a sample introduction valve structure, a sample introduction structure, a thermal desorption cavity structure, a sample introduction interface and a control assembly, wherein the sample introduction structure, the thermal desorption cavity structure and the sample introduction interface are sequentially arranged from top to bottom, the sample introduction valve structure is arranged on the left side or the right side of the thermal desorption cavity structure, the sample introduction valve structure is connected with the sample introduction interface and the thermal desorption cavity structure through transmission lines, the thermal desorption cavity structure comprises a cavity structure, the cavity structure comprises a liner tube and a cavity heating structure for heating the liner tube, an interface heating structure is arranged between the sample introduction interface and the thermal desorption cavity structure, the sample introduction valve structure comprises a sample introduction valve and a sample introduction valve heating structure fixed on the sample introduction valve, and an interface heat preservation box is arranged outside the interface heating structure, the utility model discloses a sampling valve heating structure, including sampling valve heating structure, interface heating structure, sampling valve heating structure, control assembly, sampling valve heating structure, the control assembly is used for controlling respectively the furnace chamber heating structure interface heating structure the sampling valve heating structure's temperature and be used for control the sampling valve is in different operating condition with control supplementary sampling device is in different states.
2. The auxiliary sample introduction device of an analytical instrument as recited in claim 1, wherein heat insulation cotton is disposed in each of the interface heat preservation box and the sample introduction valve heat preservation box.
3. The auxiliary sample introduction device of the analysis instrument as claimed in claim 2, wherein the sample introduction structure comprises a compression ring, a compression ring nut, a handle, a fixing nut, a sample introduction tube, a sample boat and a first sealing ring, the handle is arranged on the upper portion of the sample introduction tube, the compression ring is arranged on the upper end of the sample introduction tube and extends into the handle, the compression ring nut is arranged on the upper portion of the handle, the fixing nut is arranged on the lower portion of the handle, the first sealing ring is arranged between the sample introduction tube and the handle, the sample boat is arranged in the sample introduction tube, and the sample boat is used for containing samples.
4. The auxiliary sample introduction device for analytical instruments according to claim 3, wherein the thermal desorption chamber structure further comprises a chamber upper end fixing structure disposed at the upper end of the liner tube and a chamber lower end fixing structure disposed at the lower end of the liner tube, the chamber upper end fixing structure comprises a gas carrying tube, a sealing platen, a fixed platen, a second sealing ring and a third sealing ring, the fixed platen and the sealing platen are disposed at the upper end of the liner tube, the fixed platen is sleeved on the liner tube, the second sealing ring is disposed between the fixed platen and the liner tube, the sealing platen is sleeved on the fixed platen and pressed on the upper end of the liner tube, the third sealing ring is disposed between the sealing platen and the liner tube, the gas carrying tube chamber is disposed on the sealing platen, the lower end fixing structure comprises a chamber fixing flange, a fourth sealing ring and a sealing flange, the furnace chamber mounting flange cover is established on the bushing pipe, the sealing flange cover is established the lower extreme of bushing pipe, the fourth sealing washer set up in the bushing pipe with between the furnace chamber mounting flange, the sealing flange is used for compressing tightly the fourth sealing washer.
5. The auxiliary sample introduction device of claim 4, wherein the fixing structure at the upper end of the furnace chamber is connected with the fixing structure at the lower end of the furnace chamber by a thermal desorption chamber bracket.
6. The auxiliary sample introduction device of claim 5, wherein the sample introduction port comprises a sample introduction flange, a sample introduction nut, a sample introduction needle and a fifth sealing gasket, and the sample introduction needle is used for being connected with the sample introduction port of the analyzer.
7. The auxiliary sample introduction device of claim 6, wherein the sample introduction flange and the furnace chamber fixing flange are respectively fixed on the interface heat preservation box.
8. The auxiliary sample introduction device of claim 7, wherein the sample introduction valve structure further comprises a cylinder, a sample introduction rod and a fixing ring, the sample introduction rod connects the sample introduction valve and the cylinder together, and the fixing ring is fixed on the sample introduction rod and mounted on the sample introduction valve heat preservation box.
9. The auxiliary sample introduction device for analytical instruments according to claim 8, wherein the interface heating structure, the furnace chamber heating structure, and the sample introduction valve heating structure are respectively provided with a heater fixing hole and a temperature sensor fixing hole.
10. The auxiliary sample introduction device of the analytical instrument of claim 9, wherein the first to fifth sealing rings are graphite gaskets, metal compression rings, refractory fluorine rubber rings, or refractory silica rubber rings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123409223.8U CN217180955U (en) | 2021-12-31 | 2021-12-31 | Auxiliary sample introduction device of analytical instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123409223.8U CN217180955U (en) | 2021-12-31 | 2021-12-31 | Auxiliary sample introduction device of analytical instrument |
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| Publication Number | Publication Date |
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| CN217180955U true CN217180955U (en) | 2022-08-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN202123409223.8U Active CN217180955U (en) | 2021-12-31 | 2021-12-31 | Auxiliary sample introduction device of analytical instrument |
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| CN (1) | CN217180955U (en) |
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2021
- 2021-12-31 CN CN202123409223.8U patent/CN217180955U/en active Active
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