CN211718209U - Headspace sampling device with dual functions of quantitative ring and trapping trap - Google Patents
Headspace sampling device with dual functions of quantitative ring and trapping trap Download PDFInfo
- Publication number
- CN211718209U CN211718209U CN201922314633.0U CN201922314633U CN211718209U CN 211718209 U CN211718209 U CN 211718209U CN 201922314633 U CN201922314633 U CN 201922314633U CN 211718209 U CN211718209 U CN 211718209U
- Authority
- CN
- China
- Prior art keywords
- valve head
- trap
- valve
- ring
- sampling device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model discloses a headspace sampling device with dual functions of a quantitative ring and a trapping trap, which comprises a shell, a base and a ten-way valve, the shell is positioned outside the whole device, the bottom end of the shell is a base, the center of the base is fixedly provided with a ten-way valve, the utility model is scientific and reasonable, the use is safe and convenient, in order to improve the convenience of operators and the analysis accuracy of the analyzer, the utility model integrates a quantitative ring and a trap on a valve body of a headspace sample injector and is designed into a box body, can be communicated with external high-pressure gas, carrier gas, sample transmission pipeline and probe through pipeline connectors on the box body, and is designed in an intensive manner, so that two using modes can be conveniently switched, mutual interference is avoided, the dead volume is small, the possibility of substance residue is reduced, when another mode is needed for sample introduction, the operation of switching the sample feeding mode can be completed only by switching the ten-way valve without disassembly or additional assembly.
Description
Technical Field
The utility model relates to an analysis appearance sampling device technical field specifically is a headspace sampling device of ration ring and catch trap dual function.
Background
The headspace sampler is used for taking out gas from a headspace bottle and transferring the gas to an analyzer for analysis, and in most cases, the gas is quantified by adopting a quantification ring mode, but in some cases, because the concentration of the sample is lower than the detection limit of the analyzer, the gas in the headspace bottle can be extracted for multiple times, and then is injected after concentration (generally, a trap is adopted for concentration, the trap can adsorb substances at low temperature or normal temperature and release the adsorbed substances at higher temperature), the two sampling quantification modes usually exist independently, or an additional installation mode is required: 1. directly replace ration ring with the trap, this kind of mode makes the switching application method that the user can not be convenient, need make a round trip the dismouting, 2, install back six-way valve and ration ring and can use simultaneously additional, but will increase a valve body or other solenoid valves, this can show and increase user cost, and make the gas circuit dead volume grow because of installing the existence that connects additional, influence the analysis, and the thing that awaits measuring remained in pipeline joint department appears more easily, influence the accuracy of analysis result, two kinds of modes generally exist independently, when needing another kind of mode, need dismantle or additionally install additional, will increase relatively great cost, and the dead volume grow, it remains and influence the accuracy of analysis to take place the material more easily, so people need a ration ring and trap bifunctional headspace sampling device to solve above-mentioned problem.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a headspace sampling device of ration ring and entrapment well dual function to solve the problem that provides among the prior art.
In order to achieve the above object, the utility model provides a following technical scheme:
including casing, base, ten logical valve, ration ring, trapping well, the casing is located the whole equipment outside, the casing plays the effect of protecting the whole equipment, prevents that operating personnel from touching the internals and causing the internals to damage, the casing bottom is the base, the base plays the effect of supporting other parts of this device, base central authorities fixed mounting has the ten logical valve, the ten logical valve can adopt VICI's DC10WT type high temperature ten logical valve, the ten logical valve is convenient for accomplish the intercommunication effect between each gas circuit of cost device, base top one end fixed mounting has the ration ring, the ration ring is used for carrying out the ration to the sample and advances the appearance, ration ring one end fixed mounting is kept away from to the base top has the trapping well, the trapping well also is used for carrying out the ration to advance the appearance to the sample.
A plurality of pipeline joints are formed in two sides of the shell, and the pipeline joints are convenient for connecting and fixing an internal air circuit of the device and an external air circuit, so that the device becomes a whole body which can be detached and replaced at any time, and is convenient to replace, maintain and clean.
The casing is close to fixed mounting on the quantitative ring one end inside wall and has the motor, fixed mounting has the flabellum on the electric motor rotor, flabellum front side fixed mounting has the electric heat net, fixed mounting has the heat insulating board between trap and the quantitative ring, the heat insulating board divide into two regions with quantitative ring and trap, can avoid the heating wire of trap department to produce the temperature influence to quantitative ring or ten logical valve, also avoids the electric heat net to produce the heat influence to the trap equally, and the motor passes through the rotor and drives the flabellum rotation, blows around the heat flow of electric heat net reaches ten logical valve and quantitative ring to reach the heating effect, the motor passes through electric wire and external power source electric connection, the electric heat net passes through electric wire and external power source electric connection.
The collecting trap is characterized in that a heater is arranged outside the collecting trap, the heater can be heated by adopting a heating wire, the heating wire is wound on the collecting trap, the heating wire can be electrically connected with an external controller through an electric wire, the collecting trap is heated by the heating wire, a sample is analyzed from the collecting trap, different analyzing temperatures can be set for different substances, the collecting trap with the heating wire is wrapped by an aluminum block, a Peltier refrigerating sheet is tightly and fixedly installed on the aluminum block through heat-conducting silicone grease, when the collecting trap is in a sampling state, the refrigerating sheet works to enable the aluminum block to be cooled and conducted to the collecting trap, the collecting efficiency of the sample is improved in a low temperature state, the Peltier is connected with the external controller through an electric wire, the controller is controlled by software, the collecting trap can be refrigerated by utilizing the Peltier, low temperature generated when the Peltier is refrigerated is isolated by a heat insulation plate, the temperature of the quantitative ring and the area of the ten-way valve can not be influenced, so that the quantitative ring can still keep proper heating temperature.
The ten-way valve is provided with a first valve head, a second valve head, a third valve head, a fourth valve head, a fifth valve head, a sixth valve head, a seventh valve head, an eighth valve head, a ninth valve head and a tenth valve head, the seventh valve head and the tenth valve head are respectively communicated with two ends of the quantitative ring through pipe fittings, the second valve head and the fifth valve head are respectively communicated with two ends of the trapping trap through pipe fittings, the first valve head is fixedly connected with a pipeline joint through the pipe fittings, the third valve head is communicated with the ninth valve head through the pipe fittings, the fourth valve head is fixedly connected with the pipeline joint through the pipe fittings, and the eighth valve head is fixedly connected with the pipeline joint through the pipe fittings.
The ten-way valve is internally provided with two communication modes, wherein the first communication mode is as follows: in the process, carrier gas enters the ten-way valve from the fourth valve head, passes through the fifth valve head, a clean trapping trap, the second valve head, the third valve head and the ninth valve head, and finally flows out of the device through the eighth valve head, when the quantitative ring is full of the object to be detected, switching the ten-way valve, wherein the ten-way valve is changed into a second communication mode: the first valve head is communicated with the inside of the second valve head, the third valve head is communicated with the inside of the fourth valve head, the fifth valve head is communicated with the inside of the sixth valve head, the seventh valve head is communicated with the inside of the eighth valve head, the ninth valve head is communicated with the inside of the tenth valve head, after the ten-way valve is switched to a communication mode two, carrier gas flows through the third valve head, the ninth valve head and the tenth valve head from the fourth valve head, then the sample in the quantitative ring is conveyed to an external analyzer through the seventh valve head and the eighth valve head to complete sample injection, the trap in the process can be used as a section of empty pipeline, in the process, the probe is extracted out of the overhead bottle, pressurized gas is introduced into the device again to purge the pipeline containing the clean trap, the main function is to purge the probe, the complete process of sampling, quantitative ring sampling and sample injection is completed, and attention is that no sample passes through the clean trap, it will not interfere with the carrier gas and can be regarded as a section of pipeline.
When the quantitative sampling of the trap is adopted, the external controller controls the Peltier to refrigerate according to the program setting, the ten-way valve is firstly switched to the communication mode II, the pressurized gas passes through the sixth valve head, the fifth valve head, the trap, the second valve head and the first valve head once and enters the headspace bottle through the external probe, the pressurized gas supply is stopped at the moment, the gas phase part gas in the headspace bottle reaching the gas-liquid equilibrium state after the gas supply is stopped is discharged from the sixth valve head through the trap in the refrigeration state, the trap is filled with the object to be detected at the moment, then the circuit of the Peltier is disconnected, the refrigeration of the trap is stopped, the controller controls the heating wire to heat the trap according to the program setting, the ten-way valve is switched to the communication mode I, the carrier gas passes through the fourth valve head and the fifth valve head, then the object to be detected in the trap in the heating state is taken away, and passes through, And finally, the third valve head, the ninth valve head and the eighth valve head transmit the object to be detected to an external analyzer pipeline through a pipeline joint communicated with the eighth valve head, so that sample introduction is completed.
The pipeline joint is a circular hole groove-shaped pipeline joint, so that the internal pipeline of the device is conveniently communicated with an external air supply device through the pipeline joint.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses an improve operating personnel's convenience and the accuracy of analysis appearance, it is integrated on a valve body of headspace injector with ration ring and concentrated part (trap), and design into a box body, pipeline on the accessible box body links up interface and external high-pressure gas, the carrier gas, sample transmission pipeline, the probe intercommunication, intensive design, both conveniently switch two kinds of using-way, do not interfere with each other again, the dead volume is little, reduce the remaining possibility of material, when needing another kind of mode to advance the appearance, do not need to dismantle or additionally install, only need to switch ten logical valve and can accomplish the operation of switching the appearance mode of advancing, great cost has been reduced, the material takes place remaining possibility and reduces, be favorable to the accuracy of analysis result.
Drawings
Fig. 1 is a schematic cross-sectional view of a headspace sampling device with dual functions of a quantitative ring and a trap according to the present invention in a quantitative ring sampling mode;
fig. 2 is a schematic cross-sectional view of a headspace sampling device with dual functions of a quantitative ring and a trap in a trap sampling mode according to the present invention;
fig. 3 is a schematic diagram of the valve head position structure of a ten-way valve of a headspace sampling device with dual functions of a quantitative ring and a trap of the present invention;
fig. 4 is a schematic diagram of a front view of a dual-function headspace sampling device with a dosing ring and a trap according to the present invention;
fig. 5 is a rear view structural diagram of the headspace sampling device with dual functions of the quantitative ring and the trapping trap of the present invention.
Reference numbers in the figures: 1. a housing; 2. a base; 3. a ten-way valve; 5. a dosing ring; 6. a trap; 7. heating wires; 8. a pipeline adaptor; 91. a first valve head; 92. a second valve head; 93. a third valve head; 94. a fourth valve head; 95. a fifth valve head; 96. a sixth valve head; 97. a seventh valve head; 98. an eighth valve head; 99. a ninth valve head; 90. a tenth valve head; 11. a motor; 12. a fan blade; 13. an electric heating net.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example (b): as shown in fig. 1-5, the utility model provides a headspace sampling device technical scheme of ration ring sum trapping well dual function, which comprises a housin 1, base 2, ten logical valve 3, ration ring 5, trapping well 6, casing 1 is located the complete equipment outside, casing 1 plays the effect of protecting the complete equipment, prevent that operating personnel from touching the internals and causing the internals to damage, casing 1 bottom is base 2, base 2 plays the effect of supporting other parts of this device, 2 central authorities fixed mounting of base has ten logical valve 3, ten logical valve 3 has been convenient for accomplish the intercommunication effect between each gas circuit of cost device, 2 top one end fixed mounting of base has ration ring 5, ration ring 5 is used for advancing the ration to the sample, 5 one end fixed mounting of ration ring has trapping well 6 is kept away from to base 2 top, trapping well 6 also is used for advancing the sample ration to the sample.
A plurality of pipeline joint ports 8 are formed in two sides of the shell 1, the pipeline joint ports 8 are convenient for connecting and fixing an internal air path of the device and an external air path, so that the device becomes a whole capable of being detached and replaced at any time, and replacement, maintenance and cleaning are convenient.
The heater is arranged on the outer side of the trap 6, the heater can be heated by adopting a heating wire 7, the heating wire 7 is wound on the trap 6, the heating wire 7 is electrically connected with an external power supply through an electric wire, the trap 6 is heated by the heating wire 7, and the quantitative ring 5 is heated by the heating pipe 4, so that the sample temperature of the trap 6 can be increased, and the sample is more suitable for the analysis temperature of the analyzer.
The ten-way valve 3 is provided with a first valve head 91, a second valve head 92, a third valve head 93, a fourth valve head 94, a fifth valve head 95, a sixth valve head 96, a seventh valve head 97, an eighth valve head 98, a ninth valve head 99, and a tenth valve head 90, wherein the seventh valve head 97 and the tenth valve head 90 are respectively communicated with two ends of the dosing ring 5 through pipe fittings, the second valve head 92 and the fifth valve head 95 are respectively communicated with two ends of the trap 6 through pipe fittings, the first valve head 91 is fixedly connected with one pipeline adapter port 8 through pipe fittings, the third valve head 93 is communicated with the ninth valve head 99 through pipe fittings, the fourth valve head 94 is fixedly connected with one pipeline adapter port 8 through pipe fittings, and the eighth valve head 98 is fixedly connected with one pipeline adapter port 8 through pipe fittings.
The ten-way valve 3 has two communication modes inside, the communication mode is one: the second valve head 92 is communicated with the third valve head 93, the fourth valve head 94 is communicated with the fifth valve head 95, the sixth valve head 96 is communicated with the seventh valve head 97, the eighth valve head 98 is communicated with the ninth valve head 99, and the tenth valve head 90 is communicated with the first valve head 91, in the communication state, the outside pressurized gas enters the ten-way valve 3 through the sixth valve head 96, then sequentially flows through the sixth valve head 96, the seventh valve head 97, the quantitative ring 5, the tenth valve head 90 and the first valve head 91, finally enters the headspace bottle through the probe from the first valve head 91, then stops the gas supply of the pressurized gas, the gas phase part gas in the headspace bottle reaching the gas-liquid equilibrium state after stopping the gas supply is discharged from the sixth valve head 96 through the quantitative ring 5, at the moment, the quantitative ring 5 is filled with the object to be measured, in the process, the carrier gas enters the ten-way valve 3 from the fourth valve head 94, passes through the fifth 95, the fifth valve head 95, Clean trap 6, second valve head 92, third valve head 93, ninth valve head 99 flow out this device through eighth valve head 98 at last outside, when quantitative ring is full of the determinand, switch ten logical valve 3, ten logical valve 3 becomes communication mode two: the first valve head 91 is communicated with the inside of the second valve head 92, the third valve head 93 is communicated with the inside of the fourth valve head 94, the fifth valve head 95 is communicated with the inside of the sixth valve head 96, the seventh valve head 97 is communicated with the inside of the eighth valve head 98, the ninth valve head 99 is communicated with the inside of the tenth valve head 90, after the ten-way valve 3 is switched to a communication mode two, the carrier gas flows through the third valve head 93, the ninth valve head 99 and the tenth valve head 90 from the fourth valve head 94, then the sample in the quantitative ring 5 is taken out of the device through the seventh valve head 97 and the eighth valve head 98 to be transmitted to an external analyzer to finish sample injection, the trap 6 in the process can be used as a section of empty pipeline, in the process, the probe is taken out of a top empty bottle, the pressurized gas is re-introduced into the device to purge the pipeline containing the clean trap 6, the probe mainly acts as a purge probe, and the complete process of sampling, quantitative ring 5, note that the clean trap 6, which has no sample passing through it, does not interfere with the carrier gas and can be considered as a line.
When quantitative sampling is performed by adopting the trap 6, the ten-way valve 3 is firstly switched to a communication mode two, pressurized gas passes through the sixth valve head 96, the fifth valve head 95, the trap 6, the second valve head 92 and the first valve head 91 at one time and enters the headspace bottle through an external probe, the pressurized gas supply is stopped at this time, gas phase part gas in the headspace bottle reaching a gas-liquid balance state after the gas supply is stopped is discharged from the sixth valve head 96 through the trap 6, at this time, the trap 6 is filled with an object to be detected, then the ten-way valve 3 is switched to the communication mode one, carrier gas passes through the fourth valve head 94 and the fifth valve head 95, the object to be detected in the trap 6 is taken away, passes through the second valve head 92, the third valve head 93, the ninth valve head 99 and the eighth valve head 98, and finally is transmitted to an external analyzer pipeline through the pipeline adaptor 8 communicated with the eighth valve head 98, and sampling is completed.
The central part of the pipeline joint 8 is provided with a retainer ring 81, and the retainer ring 81 can prevent the phenomenon that any one of the internal pipeline or the external pipeline of the device is inserted too deeply into the pipeline joint 8 to cause that no residual space is left in the pipeline joint 8 for the other party to insert.
The utility model discloses a theory of operation is:
when quantitative sampling is carried out by adopting a headspace bottle, the ten-way valve 3 is firstly switched to a first communication mode, the second valve head 92 is communicated with the inside of the third valve head 93, the fourth valve head 94 is communicated with the inside of the fifth valve head 95, the sixth valve head 96 is communicated with the inside of the seventh valve head 97, the eighth valve head 98 is communicated with the inside of the ninth valve head 99, the tenth valve head 90 is communicated with the inside of the first valve head 91, external pressurized gas enters the ten-way valve 3 through the sixth valve head 96, then the external pressurized gas sequentially flows through the sixth valve head 96, the seventh valve head 97, the quantitative ring 5, the tenth valve head 90 and the first valve head 91, finally enters the headspace bottle through a probe from the first valve head 91, then the gas supply of the pressurized gas is stopped, the gas phase part of the gas in the headspace bottle which reaches a gas-liquid equilibrium state after the gas supply is stopped is discharged from the sixth valve head 96 through the quantitative ring 5, at the moment, the quantitative ring 5 is filled with a substance, through fifth valve head 95, clean trap 6, second valve head 92, third valve head 93, ninth valve head 99, flow out this device through eighth valve head 98 at last outside, when quantitative ring is full of the determinand, switch ten way valve 3, ten way valve 3 becomes communication mode two: the first valve head 91 is communicated with the inside of the second valve head 92, the third valve head 93 is communicated with the inside of the fourth valve head 94, the fifth valve head 95 is communicated with the inside of the sixth valve head 96, the seventh valve head 97 is communicated with the inside of the eighth valve head 98, the ninth valve head 99 is communicated with the inside of the tenth valve head 90, after the ten-way valve 3 is switched to a communication mode two, the carrier gas flows through the third valve head 93, the ninth valve head 99 and the tenth valve head 90 from the fourth valve head 94, then the sample in the quantitative ring 5 is taken out of the device through the seventh valve head 97 and the eighth valve head 98 to be transmitted to an external analyzer to finish sample injection, the trap 6 in the process can be used as a section of empty pipeline, in the process, the probe is taken out of a top empty bottle, the pressurized gas is re-introduced into the device to purge the pipeline containing the clean trap 6, the probe mainly acts as a purge probe, and the complete process of sampling, quantitative ring 5, note that the clean trap 6, which has no sample passing through it, does not interfere with the carrier gas and can be considered as a line.
When quantitative sampling is performed by adopting the trap 6, the ten-way valve 3 is firstly switched to a communication mode two, pressurized gas passes through the sixth valve head 96, the fifth valve head 95, the trap 6, the second valve head 92 and the first valve head 91 at one time and enters the headspace bottle through an external probe, the pressurized gas supply is stopped at this time, gas phase part gas in the headspace bottle reaching a gas-liquid balance state after the gas supply is stopped is discharged from the sixth valve head 96 through the trap 6, at this time, the trap 6 is filled with an object to be detected, then the ten-way valve 3 is switched to the communication mode one, carrier gas passes through the fourth valve head 94 and the fifth valve head 95, the object to be detected in the trap 6 is taken away, passes through the second valve head 92, the third valve head 93, the ninth valve head 99 and the eighth valve head 98, and finally is transmitted to an external analyzer pipeline through the pipeline adaptor 8 communicated with the eighth valve head 98, and sampling is completed.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (6)
1. The utility model provides a headspace sampling device of ration ring and capture trap dual function which characterized in that: including casing (1), base (2), ten logical valve (3), ration ring (5), trapping well (6), casing (1) is located the whole device outside, casing (1) bottom is base (2), base (2) central authorities fixed mounting has ten logical valve (3), base (2) top one end fixed mounting has ration ring (5), base (2) top is kept away from ration ring (5) one end fixed mounting and is had trapping well (6).
2. The dual function headspace sampling device of claim 1, wherein: a plurality of pipeline connecting ports (8) are formed in the two sides of the shell (1).
3. The dual function headspace sampling device of claim 2, wherein: casing (1) is close to fixed mounting on quantitative ring (5) one end inside wall and has motor (11), fixed mounting has flabellum (12) on motor (11) rotor, flabellum front side fixed mounting has electric heat net (13), fixed mounting has the heat insulating board between trap (6) and quantitative ring (5).
4. The dual function headspace sampling device of claim 1, wherein: and a heater is arranged outside the trap (6).
5. The dual function headspace sampling device of claim 2, wherein: the ten-way valve (3) is provided with a first valve head (91), a second valve head (92), a third valve head (93), a fourth valve head (94), a fifth valve head (95), a sixth valve head (96), a seventh valve head (97), an eighth valve head (98), a ninth valve head (99) and a tenth valve head (90), the seventh valve head (97) and the tenth valve head (90) are respectively communicated with the two ends of the quantitative ring (5) through pipe fittings, the second valve head (92) and the fifth valve head (95) are respectively communicated with the two ends of the trap (6) through pipe fittings, the first valve head (91) is fixedly connected with a pipeline joint (8) through a pipe fitting, the third valve head (93) is communicated with the ninth valve head (99) through a pipe fitting, the fourth valve head (94) is fixedly connected with a pipeline joint port (8) through the pipe fitting, the eighth valve head (98) is fixedly connected with a pipeline adapter port (8) through a pipe fitting.
6. The dual function headspace sampling device of claim 5, wherein: the pipeline connecting port (8) is a circular hole-shaped pipeline connecting port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922314633.0U CN211718209U (en) | 2019-12-20 | 2019-12-20 | Headspace sampling device with dual functions of quantitative ring and trapping trap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922314633.0U CN211718209U (en) | 2019-12-20 | 2019-12-20 | Headspace sampling device with dual functions of quantitative ring and trapping trap |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211718209U true CN211718209U (en) | 2020-10-20 |
Family
ID=72819369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922314633.0U Active CN211718209U (en) | 2019-12-20 | 2019-12-20 | Headspace sampling device with dual functions of quantitative ring and trapping trap |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211718209U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112666276A (en) * | 2020-11-30 | 2021-04-16 | 浙江必利夫检测科技有限公司 | Gas chromatograph for detecting alcohols and detection method thereof |
-
2019
- 2019-12-20 CN CN201922314633.0U patent/CN211718209U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112666276A (en) * | 2020-11-30 | 2021-04-16 | 浙江必利夫检测科技有限公司 | Gas chromatograph for detecting alcohols and detection method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN211718209U (en) | Headspace sampling device with dual functions of quantitative ring and trapping trap | |
| CN102607979B (en) | Vacuum glass thermal cycling fatigue test device | |
| CN204115520U (en) | For heat exchanger and the dynamical system of dynamical system | |
| CN108023451B (en) | Positive pressure explosion-proof generator | |
| CN203869931U (en) | Adsorption and heat desorption device | |
| CN103314490B (en) | The equipment rack distribution system of band cooling | |
| CN213989802U (en) | In put cabinet heat radiation structure | |
| CN206670186U (en) | Blood analyser and its reagent bottle cold storage plant | |
| CN203798622U (en) | Device for absorbing mineral oil in sulfur hexafluoride gas | |
| CN106546646B (en) | A kind of low-concentration hydrogen phosphide concentration on-line monitoring method | |
| CN210401334U (en) | Integrated gas chromatograph | |
| CN204740110U (en) | Urea heating pipe detection device | |
| CN211426393U (en) | Superheated decomposition gas component detection device | |
| CN211311469U (en) | Fluorescent quantitative PCR instrument easy to dissipate heat | |
| CN209978527U (en) | Electric heating constant temperature drying cabinet | |
| CN210294504U (en) | Socket safety performance detection device | |
| JP6676787B2 (en) | Switch cabinet for exhaust gas measurement device | |
| CN202813613U (en) | Evaporative cooling fan | |
| CN201191383Y (en) | Temperature control device | |
| US20030159527A1 (en) | Sample flow path assembly for electronic gas leak detectors | |
| CN218917310U (en) | Column incubator with heating constant temperature function and ion chromatograph | |
| CN217033311U (en) | Digestion instrument | |
| CN103738049B (en) | Vacuum heat transfer machine | |
| CN101701584B (en) | Special external transducer speeder for mine ventilator | |
| CN211235674U (en) | Novel gas chromatograph |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |