CN212568362U - High-precision sample inlet unit of automatic viscometer and automatic sample injector of viscometer - Google Patents
High-precision sample inlet unit of automatic viscometer and automatic sample injector of viscometer Download PDFInfo
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- CN212568362U CN212568362U CN202020694936.XU CN202020694936U CN212568362U CN 212568362 U CN212568362 U CN 212568362U CN 202020694936 U CN202020694936 U CN 202020694936U CN 212568362 U CN212568362 U CN 212568362U
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Abstract
The utility model discloses a high-precision sample inlet unit of an automatic viscometer and an automatic sample injector of the viscometer, which comprises a sample inlet guide unit, a three-way joint, a gas inlet screw and a sample inlet pipe, wherein the output port of the sample inlet guide unit is hermetically arranged with a first interface of the three-way joint, and the gas inlet screw is hermetically arranged with a second interface of the three-way joint; one end of the sample inlet pipe is hermetically arranged with the third interface of the three-way joint, and the other end of the sample inlet pipe is communicated with a sample inlet of the chromatograph. The utility model discloses a set up on advance kind station with the automatic viscosity meter introduction port unit of syringe complex high accuracy, not only can realize the demand that the syringe advanced, can also realize advancing the sample and can enter into the instrument equipment after accomplishing remaining sample at every turn, not only guaranteed the cleanness of appearance pipeline, when overcoming the unmatched problem of current automatic sampler and sampling equipment interface moreover, improved the precision of appearance greatly.
Description
Technical Field
The utility model relates to a liquid sampling equipment technical field especially relates to an automatic viscometer sample inlet unit and viscometer automatic sample injector of high accuracy.
Background
At present, most of sampling needle type full-automatic sampling systems use the sampling port of a chromatographic instrument as a sample injection device, for a full-automatic sample introduction system which can not butt joint a sample introduction port of an instrument, such as a full-automatic viscosity tester and other instruments, because a sample introduction needle and the sample introduction port can not be directly butt jointed during sample introduction, therefore, the injection is basically carried out by adopting a quantitative pump type sample injection mode, but based on the self limitation of the quantitative pump, the conditions of low precision and large standard deviation are often generated when the quantitative pump type sample injection is used, thereby causing certain influence on the using effect, especially under the situation of higher sample feeding precision requirement, the sample feeding requirement can not be met by using the common quantitative pump type sample feeding, and if the high-precision quantitative pump is purchased, the instrument cost is greatly increased, therefore, how to realize the matching of the existing needle type automatic sample introduction system and the sample introduction port of the viscosity tester is a problem which needs to be solved urgently.
Most of the existing viscosity testers adopt manual sampling mode, part adopts quantitative pump type sampling, the sampling step does not completely meet the national standard requirement, and no sampling needle type automatic sampling device exists in the existing market.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an automatic viscometer sample inlet unit and viscometer automatic sample injector of high accuracy can realize that full-automatic viscosity tester uses with the automatic sample injector cooperation, and during the autoinjection, the two sample inlet can directly dock, and can use trace or constant sampling needle to advance the appearance to improve the sampling precision greatly.
The utility model adopts the technical proposal that:
a high-precision sample inlet unit of an automatic viscometer comprises a sample inlet guide unit, a three-way joint, a gas inlet screw and a sample inlet pipe, wherein the sample inlet guide unit is used for being matched with a sample inlet of a full-automatic sample injector; one end of the sample inlet pipe is hermetically arranged with the third interface of the three-way joint, and the other end of the sample inlet pipe is used for being communicated with a sample inlet of the viscosity tester;
the sample injection needle guiding unit comprises a cylinder body, a guiding channel is axially arranged in the cylinder body, an external thread is arranged on the outer circumference of the lower part of the cylinder body, and the diameter of the guiding channel is matched with the diameter of a metal core of the sample injection needle and used for guiding the metal core of the sample injection needle to enter a first sealing interface of a three-way joint.
The guide passage comprises a first passage and a second passage which are arranged up and down, the first passage is a tapered passage, the second passage is a cylindrical passage, the diameter of the upper end of the first passage is larger than that of the lower end of the first passage, and the diameter of the lower end of the first passage is the same as that of the second passage.
The first sealing assembly comprises a first screw and a solvent pipe, wherein the first screw is axially provided with a through hole, one end of the solvent pipe is circumferentially provided with an extending lug, the extending lug is axially vertical to the solvent pipe, and the cylinder compresses the extending lug to enable the upper end of the solvent pipe to be hermetically arranged with the first interface; the upper part of the first screw is provided with an axial inner screw hole matched with the outer thread at the lower part of the column, and the lower part of the first screw is fixed with the first interface; the solvent pipe passes through the through hole of first screw setting, and the other end and the first interface intercommunication of solvent pipe.
The other end of the solvent pipe is also provided with an extension lug along the circumference, the extension lug is axially vertical to the solvent pipe, the extension lug at one end of the solvent pipe compresses the extension lug through a cylinder to enable the upper end of the solvent pipe to be in sealing arrangement with the first screw, the extension lug at the other end of the solvent pipe compresses the extension lug through the first screw to enable the lower end of the solvent pipe to be in sealing arrangement with the first interface, and the length of the solvent pipe is the same as that of the through hole of the first screw.
The sampling tube is sealed with the third interface through the second sealing component.
The second sealing assembly comprises a second screw with a through hole in the axial direction, an extending lug is arranged at the end part of one end of the sampling tube along the circumference, and the extending lug is axially vertical to the sampling tube; the sampling tube penetrates through the through hole of the second screw, and the extending lug is compressed through the second screw to enable the upper end of the sampling tube to be hermetically arranged with the second interface.
Still include advance appearance pipe locking portion, advance appearance pipe locking portion including the third screw of taking axial through-hole and locking clamping ring, second screw upper portion be provided with third screw external screw thread complex axial interior screw hole, the locking clamping ring sets up in the cooperation department of second screw and third screw for the two further fixed seal.
The locking clamping ring is a tapered plastic locking clamping ring.
The solvent pipe is a plastic pipe.
The utility model provides a viscosimeter autosampler, includes viscosimeter autosampler body, still includes the liquid introduction port device of high accuracy.
The utility model discloses a set up on advance kind station with the liquid sample introduction port device of syringe complex high accuracy, the liquid sample introduction port device of high accuracy not only can realize the demand that the syringe advanced a kind, can also realize advancing a kind at every turn and accomplish the back, the gas of by the auto-sampler control air supply blows to the device self after advancing a kind through gas access mouth screw, make remaining sample can enter into instrument and equipment, the unmatched problem of current full-automatic viscosity tester and viscosity agent auto-sampler interface has been overcome, and the needle type advances a kind and compare the appearance of quantitative pump and improved the precision of advancing a kind greatly.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a cross-sectional view of the present invention.
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 any creative effort belong to the protection scope of the present invention.
As shown in fig. 1 and 2, the utility model comprises a sample injection needle guide unit, a three-way joint 5, a gas inlet screw 4 and a sample injection tube 9, wherein the sample injection needle guide unit is matched with the sample injection needle of the full-automatic sample injector in a sample injection way, the output port of the sample injection needle guide unit is hermetically arranged with a first interface 10 of the three-way joint 5, the gas inlet screw 4 is hermetically arranged with a second interface 11 of the three-way joint, and the gas inlet screw 4 is used for connecting a gas source gas circuit; one end of the sample inlet pipe 9 is hermetically arranged with a third interface 12 of the three-way joint, and the other end of the sample inlet pipe 9 is used for being communicated with a sample inlet of the viscosity tester;
the sample injection needle guide unit is hermetically arranged with the first interface 10 through a first sealing component; sample introduction needle guide unit include cylinder 1, axial is provided with guide channel in the cylinder 1, 1 lower part of cylinder is provided with the external screw thread, guide channel including first passageway 13 and the second passageway 14 that sets up from top to bottom, first passageway 13 be the tapered passageway, second passageway 14 is the cylinder passageway, the upper end diameter of first passageway 13 is greater than the lower extreme diameter, the lower extreme diameter of first passageway 13 is the same with the diameter of second passageway 14, the diameter and the sample introduction needle metal core diameter of second passageway 14 match for guide sample introduction needle metal core gets into three way connection 5. The upper end opening of the sample injection needle guide unit is larger, the lower part of the sample injection needle guide unit is a through hole slightly wider than the outer diameter of the sample injection needle, and a taper hole is formed between the upper part and the lower part, so that the metal core of the sample injection needle can slide into the guide hole, namely the guide channel, along the taper hole.
The utility model discloses a set up sampling needle guide unit on three way connection 5 respectively, gaseous access mouth screw 4 and sample inlet pipe 9, the three can communicate each other, and then can make the sampling needle can directly pass through three way connection 5 and sample inlet pipe 9 and viscometer introduction port intercommunication, thereby can realize stable and accurate appearance of advancing, simultaneously through connecting outside air supply at gaseous access mouth screw 4, can be through blowing of outside air supply to remain in measuring instruments such as viscometer are insufflated to the appearance of advancing of sample back three way connection 5 and sample inlet pipe 9, thereby make the appearance precision of advancing improve greatly, whole device need not change the structure of current sample inlet ware and can solve the mismatching and the not high problem of precision of interface.
In practical application, the three-way joint 5 has an upper through interface and a lower through interface (such as a first interface 10 and a third interface 12 in the figure) and a side interface (a second interface 11), the upper part is connected with a first screw 2 of the first sealing component, the lower part is connected with a third screw 7 of the sample injection pipe locking part, and the side surface is connected with a gas inlet screw 4, which are respectively in threaded connection and matching and are mainly used for connecting the upper module and the lower module and guiding the cleaning gas.
Further, because the device adopts all the spiro union, but in practical application, threaded connection's leakproofness is not very good, still can produce the non-sealed condition, and non-sealed can influence the precision of this device greatly, so further this application has increased seal assembly in practical application, seal assembly's sealed form can be various, as long as can realize the device spiro union between each part leakproofness can, the following is exemplified by concrete embodiment:
aiming at the sealing of the sample injection needle guide unit and the three-way joint 5, the following technical scheme is adopted:
in the sealing embodiment 1, the first sealing assembly comprises a first screw 2 with an axial through hole and a solvent tube 3, one end of the solvent tube 3 is circumferentially provided with an extension lug (also called a flanging), and the extension lug is axially vertical to the solvent tube 3; an axial inner screw hole is formed in the upper portion of the first screw 2, the solvent pipe 3 penetrates through the through hole of the first screw 2, and the other end of the solvent pipe 3 is communicated with the first connector 10. By arranging the extension lug at one end of the solvent tube 3, namely adopting a plastic sample inlet tube with a flange at one end for sample injection, the sample discharged from the sample injection needle can be effectively ensured to flow into a sample inlet of an instrument, and the sample is prevented from overflowing from a position between the sample injection needle guide unit and the first interface; meanwhile, when the pneumatic valve acts, gas enters the guide channel through a pipe wall gap between the first interface 10 and the solvent pipe 3, so that the sample purging effect cannot be realized, and further the sampling precision is influenced. The liquid flow tightness is realized.
The difference between the sealed embodiment 2 and the embodiment 1 is that the other end of the solvent tube 3 is also provided with an extending lug along the circumference, the extending lug is also perpendicular to the axial direction of the solvent tube 3, the extending lug arranged at one end of the solvent tube 3 is pressed by the cylinder 1 to enable the upper end of the solvent tube 3 to be sealed with the first screw 2, and the extending lug arranged at the other end of the solvent tube 3 is pressed by the first screw 2 to enable the lower end of the solvent tube 3 to be sealed with the first connector 10. Under the condition that the length of the solvent tube is the same as that of the through hole of the first screw, the other end of the solvent tube 3 is also provided with the extension lug, so that a sample discharged from the sampling needle can flow into a sampling port of an instrument, and the sample is prevented from overflowing from a position between the sampling needle guide unit and the first interface; meanwhile, when the pneumatic valve acts, gas is prevented from being communicated with the outside through a gap formed by screwing the first interface 10 and the first screw 2, so that the effect of purging the sample cannot be realized, and the sampling precision is further influenced.
To advancing sealed setting between appearance pipe 9 and the third interface 12, can bond according to the reality, but the bonding is unstable, still has the risk of fracture disconnection during the air-blowing, so this application realizes the two sealed through setting up second seal assembly, specific still including second seal assembly, the appearance pipe pass through second seal assembly and the sealed setting of third interface.
The second sealing assembly comprises a second screw 6 with a through hole in the axial direction, an extending lug is arranged at the end part of one end of the sampling tube 9 along the circumference, and the extending lug is axially vertical to the sampling tube 9; the sampling tube 9 passes through the through hole of the second screw 6, and the second screw 6 presses the extension lug to seal the upper end of the sampling tube 6 with the third interface 12.
The sample injection pipe locking part comprises a third screw 7 with an axial through hole and a locking clamping ring 8, an axial inner screw hole matched with the third screw 7 through external threads is formed in the upper portion of the second screw 6, and the locking clamping ring 8 is arranged at the matched position of the second screw 6 and the third screw 7, so that a sample can be effectively prevented from overflowing upwards from the sample injection pipe 9, and the consistency of sample injection amount is ensured; the sampling tube 9 sequentially penetrates through the through holes of the second screw 6 and the third screw 7, the length of the sampling tube 9 is greater than the sum of the lengths of the through holes of the second screw 6 and the third screw 7, and the other end of the sampling tube 9 is arranged outside the third screw 7. In a similar way, the sampling tube 9 with the extension ears can realize that the sealing effect of the threaded connection is improved when the sampling tube 9 is extruded and fixed through the threaded connection of the second screw 6 and the third interface 12, and the smoothness of liquid sampling is ensured.
Further, in practical application, according to actual needs, the sampling tube locking part can be arranged at the bolt joint of the first screw 2 and the first interface 10, the tightness of the bolt joint can be greatly enhanced through the conical plastic locking compression ring, and the stability is greatly improved.
The viscosity agent autosampler comprises a viscosity agent autosampler body and the high-precision liquid sample inlet device. A high-precision liquid sample injection port device is additionally arranged on the body of the existing automatic sample injector, and can be directly arranged on a six-way valve interface of a viscosity tester when in use, thereby realizing the technical problem that the sample injection of instruments can not be butted by using micro or constant sample injection needles in the automatic sample injector of instruments such as a full automatic viscosity tester and the like without changing the structure and logic control of the automatic sample injector, the liquid sample can be introduced into a measuring instrument by directly fixing the device on a sample injection station, and the electromagnetic valve is controlled to be opened by a main system of the instrument, gas can be blown into the measuring instrument by the gas inlet of an electromagnetic valve seat, the gas outlet of the electromagnetic valve, a connecting pipeline and the gas inlet in the liquid sample injection port device, the gas blowing is carried out on the sample injection pipe and the sample injection needle, and the residual liquid on the inner wall of the connecting pipeline is blown into the measuring instrument, not only ensures the cleanness of the flow paths of the sample inlet pipe and the sample inlet needle, but also greatly improves the sample inlet precision.
In the description of the present invention, it should be noted that, for the orientation words, there are terms of "center", "lateral", "longitudinal", and the like
The directional and positional relationships indicated for "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are based on the directional or positional relationships illustrated in the drawings, are intended to facilitate the description of the invention and to simplify the description, but do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the scope of the invention in any way.
It is noted that the terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides an automatic viscosity-meter introduction port unit of high accuracy which characterized in that: the sampling device comprises a sampling needle guide unit, a three-way joint, a gas inlet screw and a sampling tube, wherein the sampling needle guide unit is used for being matched with a sampling needle of a full-automatic sampler in a sampling way; one end of the sample inlet pipe is hermetically arranged with the third interface of the three-way joint, and the other end of the sample inlet pipe is used for being communicated with a sample inlet of the viscosity tester;
the sample injection needle guiding unit comprises a cylinder body, a guiding channel is axially arranged in the cylinder body, an external thread is arranged on the outer circumference of the lower part of the cylinder body, and the diameter of the guiding channel is matched with the diameter of a metal core of the sample injection needle and used for guiding the metal core of the sample injection needle to enter a first sealing interface of a three-way joint.
2. The high precision auto-viscometer sample inlet unit of claim 1, wherein: the guide passage comprises a first passage and a second passage which are arranged up and down, the first passage is a tapered passage, the second passage is a cylindrical passage, the diameter of the upper end of the first passage is larger than that of the lower end of the first passage, and the diameter of the lower end of the first passage is the same as that of the second passage.
3. The high precision auto-viscometer sample inlet unit of claim 1, wherein: the first sealing assembly comprises a first screw and a solvent pipe, wherein the first screw is axially provided with a through hole, one end of the solvent pipe is circumferentially provided with an extending lug, the extending lug is axially vertical to the solvent pipe, and the cylinder compresses the extending lug to enable the upper end of the solvent pipe to be hermetically arranged with the first interface; the upper part of the first screw is provided with an axial inner screw hole matched with the outer thread at the lower part of the column, and the lower part of the first screw is fixed with the first interface; the solvent pipe passes through the through hole of first screw setting, and the other end and the first interface intercommunication of solvent pipe.
4. The high precision auto viscometer sample inlet unit of claim 3, wherein: the other end of the solvent pipe is also provided with an extension lug along the circumference, the extension lug is axially vertical to the solvent pipe, the extension lug at one end of the solvent pipe compresses the extension lug through a cylinder to enable the upper end of the solvent pipe to be in sealing arrangement with the first screw, the extension lug at the other end of the solvent pipe compresses the extension lug through the first screw to enable the lower end of the solvent pipe to be in sealing arrangement with the first interface, and the length of the solvent pipe is the same as that of the through hole of the first screw.
5. The high precision auto-viscometer sample inlet unit of claim 1, wherein: the sampling tube is sealed with the third interface through the second sealing component.
6. The high precision auto-viscometer sample inlet unit of claim 5, wherein: the second sealing assembly comprises a second screw with a through hole in the axial direction, an extending lug is arranged at the end part of one end of the sampling tube along the circumference, and the extending lug is axially vertical to the sampling tube; the sampling tube penetrates through the through hole of the second screw, and the extending lug is compressed through the second screw to enable the upper end of the sampling tube to be hermetically arranged with the second interface.
7. The high precision auto-viscometer sample inlet unit of claim 6, wherein: still include advance appearance pipe locking portion, advance appearance pipe locking portion including the third screw of taking axial through-hole and locking clamping ring, second screw upper portion be provided with third screw external screw thread complex axial interior screw hole, the locking clamping ring sets up in the cooperation department of second screw and third screw for the two further fixed seal.
8. The high precision auto-viscometer sample inlet unit of claim 7, wherein: the locking clamping ring is a tapered plastic locking clamping ring.
9. The high precision auto viscometer sample inlet unit of any one of claims 3 to 4, wherein: the solvent pipe is a plastic pipe.
10. The utility model provides a viscosimeter autosampler, includes viscosimeter autosampler body, its characterized in that: further comprising the auto-viscometer sample inlet unit of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020694936.XU CN212568362U (en) | 2020-04-30 | 2020-04-30 | High-precision sample inlet unit of automatic viscometer and automatic sample injector of viscometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020694936.XU CN212568362U (en) | 2020-04-30 | 2020-04-30 | High-precision sample inlet unit of automatic viscometer and automatic sample injector of viscometer |
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| Publication Number | Publication Date |
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| CN212568362U true CN212568362U (en) | 2021-02-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020694936.XU Active CN212568362U (en) | 2020-04-30 | 2020-04-30 | High-precision sample inlet unit of automatic viscometer and automatic sample injector of viscometer |
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| CN (1) | CN212568362U (en) |
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- 2020-04-30 CN CN202020694936.XU patent/CN212568362U/en active Active
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