CN214334799U

CN214334799U - Lifting needle frame and automatic sample injector

Info

Publication number: CN214334799U
Application number: CN202120241125.9U
Authority: CN
Inventors: 崔甜甜; 曲新聪
Original assignee: QINGDAO PUREN INSTRUMENT CO Ltd
Current assignee: QINGDAO PUREN INSTRUMENT CO Ltd
Priority date: 2021-01-28
Filing date: 2021-01-28
Publication date: 2021-10-01
Anticipated expiration: 2031-01-28

Abstract

The utility model provides a over-and-under type needle frame and autosampler. Over-and-under type needle frame includes: a lifting mechanism provided with a lifting part capable of moving up and down; a needle seat disposed on the lifting portion; and the pressing plate is arranged on the lifting mechanism and is positioned below the needle seat. The sampling tube is prevented from being pulled up together, the sampling needle and the sampling tube are reliably separated, and the use reliability of the automatic sampler is improved.

Description

Lifting needle frame and automatic sample injector

Technical Field

The utility model relates to an analytical instrument especially relates to an over-and-under type needle frame and autosampler.

Background

The chromatographic analyzer is an instrument for qualitatively and quantitatively analyzing substances by using chromatography and researching physical and chemical properties of the substances. For example, Chinese patent No. 201110457038.8 discloses an automatic sample injector which is generally equipped with a pump, a valve, a needle, etc., and a sample tube for holding a sample is mounted by a turntable. During the in-service use, the sampling needle passes through elevating system and drives the sampling needle and reciprocate to the realization carries out the sample operation to the sample in the sampling tube of below. However, the tube cap at the top of the sampling tube is generally made of rubber to meet the requirement of penetration of the sampling needle, and when the sampling needle is pulled out of the sampling tube, the sampling tube is easily pulled up together due to the friction force between the sampling needle and the tube cap, thereby causing sampling failure. How to design a reliable sample in order to improve the technique that autosampler used the reliability is the utility model discloses the technical problem who solves.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: the utility model provides a over-and-under type needle frame and auto-sampler realizes avoiding pulling up the sampling tube together to reliable separates sampling needle and sampling tube, improves auto-sampler's use reliability.

The technical scheme provided by the utility model is, a over-and-under type needle frame, include:

a lifting mechanism provided with a lifting part capable of moving up and down;

a needle seat disposed on the lifting portion;

and the pressing plate is arranged on the lifting mechanism and is positioned below the needle seat.

Furthermore, a needle penetrating hole for installing a sampling needle is formed in the needle base, and a through hole is formed in the pressing plate.

Furthermore, be provided with a plurality of on the needle file side by side wear the pinhole, be provided with on the clamp plate correspondingly side by side arrange a plurality of the through-hole.

Further, the through holes and the corresponding needle penetrating holes are coaxially arranged.

Furthermore, the lifting mechanism comprises a mounting bracket, a sliding block, a screw rod and a driving motor, the sliding block is arranged on the mounting bracket in a sliding mode, a threaded through hole is formed in the sliding block, the screw rod is rotatably arranged in the threaded through hole, the driving motor is in transmission connection with the screw rod, and the pressing plate is arranged on the lower portion of the mounting bracket.

The utility model also provides an automatic sample injector, including the syringe, still include above-mentioned over-and-under type needle frame, the syringe sets up on the needle file of over-and-under type needle frame, over-and-under type needle frame sets up on the shell.

Furthermore, a lifting mechanism in the lifting needle frame is arranged on the shell.

Furthermore, a pressure plate in the lifting needle frame is arranged on the shell.

The utility model provides an over-and-under type needle frame and autosampler, dispose the clamp plate through the below at the needle file, the sampling needle passes through elevating system and drives the downstream and insert the sampling tube, accomplish the sample back, elevating system drives the in-process of sampling needle rebound, even if take place the sampling tube and follow the sampling needle rebound, under the effect of clamp plate, can block spacingly with the sampling tube, so that the sampling needle can be reliable break away from down from the sampling needle, avoid pulling up the sampling tube together, separate sampling needle and sampling tube with reliable, improve autosampler's use reliability.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are 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 view of the structure of an embodiment of the lift needle frame of the present invention

FIG. 2 is a schematic diagram of an embodiment of an automatic sample injector according to the present invention;

FIG. 3 is a second schematic diagram of the auto-sampler according to the present invention;

FIG. 4 is a partial sectional view taken along line A of FIG. 3;

FIG. 5 is a third schematic structural diagram of an automatic sample injector according to an embodiment of the present invention;

FIG. 6 is a cross-sectional view taken along line B-B of FIG. 5;

FIG. 7 is a second sectional view taken along line B-B of FIG. 5;

fig. 8 is a partially enlarged schematic view of the region C in fig. 7.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In a first embodiment, as shown in fig. 1, the present invention provides a lift needle frame, including:

An elevating mechanism 331, in which the elevating mechanism 331 is provided with an elevating part (not shown) that can move up and down;

a needle holder 332, the needle holder 332 being provided on the lifting portion;

the pressing plate 333 is arranged on the lifting mechanism 331 and below the needle seat 332.

Specifically, the sampling needle 200 is mounted on the needle seat 332, and during sampling, the lifting mechanism 331 drives the needle seat 332 to move downward, so that the sampling needle 200 is inserted into the sampling tube below. After sampling is completed, the lifting mechanism 331 again drives the needle holder 332 to move upward, so that the sampling needle 200 is pulled out from the sampling tube. However, during the withdrawal of the probe 200, there is a case where a part of the probe follows the movement of the probe 200. At this time, for the sampling tube moving along with the sampling tube, the pressing plate 333 at the top is touched in the upward moving process, and then the pressing plate 333 shields the sampling tube 100, so that the sampling tube is separated from the sampling needle 200, and the sampling tube is prevented from moving along with the sampling needle 200 all the time to cause equipment damage.

The needle holder 332 is provided with a needle hole (not labeled) for mounting the sampling needle 200, and the pressing plate 333 is provided with a through hole (not labeled). Specifically, the sampling needle 200 is installed in the corresponding needle hole, and the lower end of the sampling needle 200 passes through the through hole, so that the sampling needle 200 can be effectively supported by the pressing plate 333 at the bottom. On one hand, the sampling needle 200 can be prevented from being inclined at the needle point position at the bottom due to overlong length, on the other hand, the bottom of the sampling needle 200 is supported by the pressing plate 333, so that the sampling needle 200 can be accurately, stably and reliably inserted into the sampling tube, and the phenomenon that the sampling needle 200 is broken when being inserted due to overlong length can be avoided. According to the requirement of the sampling quantity, a plurality of needle penetrating holes may be arranged side by side on the needle seat 332, and a plurality of through holes arranged side by side are correspondingly arranged on the pressing plate 333. In order to enhance the supporting strength of the pressing plate 333 to the sampling needle 200, the through holes are coaxially arranged with the corresponding needle insertion holes.

Further, the lifting mechanism 331 is embodied in various manners. For example: the lifting mechanism 331 comprises a mounting bracket 3311, a slide block 3312, a screw rod 3313 and a driving motor 3314, wherein the slide block 3312 is slidably arranged on the mounting bracket 3311, the slide block 3312 is provided with a threaded through hole, the screw rod 3313 is rotatably arranged in the threaded through hole, the driving motor 3314 is in transmission connection with the screw rod 3313, and a pressing plate 333 is arranged at the lower part of the mounting bracket 3311. Specifically, the slider 3312 serves as an elevating portion of the elevating mechanism 331, and the driving motor 3314 drives the screw 3313 to rotate, so that the slider 3312 slides on the mounting bracket 3311. And a pressure plate 333 is provided at a lower portion of the mounting bracket 3311 to block the sampling tube.

Through the below configuration clamp plate at the needle file, the sampling needle passes through elevating system and drives the downstream and insert the sampling tube, accomplish the sample back, elevating system drives the in-process of sampling needle rebound, even if take place the sampling tube and follow the sampling needle rebound, under the effect of clamp plate, can block spacingly with the sampling tube, so that the sampling needle can be reliable break away from down from the sampling needle, avoid pulling up the sampling tube together with reliable separating sampling needle and sampling tube, improve the use reliability of autosampler.

The pressure plate 333 may also be disposed on the housing of the auto sampler as needed, which is not limited or described herein.

In the second embodiment, as shown in fig. 2 to 8, the automatic sampler of this embodiment includes a sample injection needle 200, a pump, and other components, and further includes an automatic sample injection module. The autoinjection module includes:

a base 1;

the tray 2 is provided with a plurality of jacks (not marked) which are arranged in an array and used for inserting and placing the sampling tubes 100, and the tray 2 is detachably arranged on the base 1;

the three-dimensional moving module 3, the three-dimensional moving module 3 includes an X-axis moving component 32, a Y-axis moving component 31 and a Z-axis moving component 33;

the Y-axis moving assembly 31 includes a Y-axis moving platform 311, a first motor 312, a first transmission shaft 313, a first support connector 314 and a first synchronous belt set 315, the first synchronous belt set 315 includes a first driving wheel 3151, a first driven wheel 3152 and a first synchronous belt 3153, the Y-axis moving platform 311 is slidably disposed on the base 1 along the Y-axis, the first transmission shaft 313 is rotatably disposed on the base 1, the first motor 312 is in transmission connection with the first transmission shaft 313, the first driving wheel 3151 is mounted on the first transmission shaft 313, the first driven wheel 3152 is disposed away from the first motor 312 and is rotatably mounted on the base 1 through the first support connector 314, the first synchronous belt 3153 is wound on the first driving wheel 3151 and the first driven wheel 3152, and the Y-axis moving platform 311 is connected with the first synchronous belt 3153;

The X-axis moving assembly 32 includes an X-axis moving platform 321, a second motor 322, a second transmission shaft 323, a second supporting connector 324 and a second synchronous belt group 325, the second synchronous belt group 325 includes a second driving wheel 3251, a second driven wheel 3252 and a second synchronous belt 3253, the X-axis moving platform 321 is slidably disposed on the Y-axis moving platform 311 along the X-axis, the second transmission shaft 323 is rotatably disposed on the Y-axis moving platform 311, the second motor 322 is in transmission connection with the second transmission shaft 323, the second driving wheel 3251 is mounted on the second transmission shaft 323, the second driven wheel 3252 is disposed away from the second motor 322 and is rotatably mounted on the Y-axis moving platform 311 through the second supporting connector 324, the second synchronous belt is wound on the second driving wheel 3251 and the second driven wheel 3252, and the X-axis moving platform 321 is connected with the second synchronous belt 3253;

the Z-axis moving assembly 33 is the lifting needle frame in the first embodiment, which is not described herein.

Specifically, in the actual use process, the sampling needle 200 is placed on the needle seat 332, the sampling needle 200 is connected with the pump of the automatic sampler through a pipeline, and the specific pipeline connection mode of the sampling needle 200 is not limited or described herein, and specifically, the pipeline connection mode in the automatic sampling device in the conventional technology can be adopted.

An operator places a plurality of sampling tubes on the tray 2 and inserts them into the corresponding insertion holes, and then places the tray 2 on the base 1. Then, the three-dimensional moving module 3 can drive the sampling needle 200 to move to the upper part of the designated sampling tube for sampling.

The Y-axis moving component 31 in the three-dimensional moving module 3 generally moves along the length direction of the base 1, and the X-axis moving component 32 generally moves along the width direction of the base 1, although the reverse direction may be used instead, and is not limited herein. The overall movement path of the Y-axis moving assembly 31 and the X-axis moving assembly 32 is long, in order to avoid the step-out phenomenon in the moving process, the driven wheel in the moving assembly is supported and connected through the supporting and connecting piece, the axis of the driven wheel and the corresponding driving wheel is kept parallel by the supporting and connecting piece, so that the synchronous belt can rotate stably to reduce or avoid the step-out phenomenon, and the moving position of the sampling needle 200 is ensured to be accurate and reliable. That is, first support link 314 serves to maintain the axis of first drive pulley 3151 parallel to the axis of first driven pulley 3152, and second support link 324 serves to maintain the axis of second drive pulley 3251 parallel to the axis of second driven pulley 3252.

Wherein, for the convenience of realizing dismouting tray 2, then can be provided with the spout on base 1, tray 2 slides and sets up in the spout to realize cooperating with base 1's connection.

In addition, the Y-axis moving platform 311 may straddle the base 1, the Y-axis moving assembly 31 includes two first synchronous belt sets 315, and first driving wheels 3151 are respectively disposed at both ends of the first transmission shaft 313. Specifically, the first timing belt groups 315 arranged on both sides are used to apply balanced force to both sides of the Y-axis moving platform 311, so as to ensure the Y-axis moving platform 311 to move smoothly. And two first driven wheels 3152 distributed on both sides of the base 1 are also provided in a coaxial arrangement.

Further, the Y-axis moving platform 311 is integrally of a gantry structure, and the X-axis moving assembly 32 is installed at the top of the gantry structure. The second driving pulley 3251 is disposed at one side of the Y-axis moving platform 311, and the second motor 322 is disposed at the other side of the Y-axis moving platform 311. For the second transmission shaft 323, it passes through the Y-axis moving platform 311, one end of the second transmission shaft 323 is connected with the second driving wheel 3251, and the other end is connected with the rotating shaft of the second motor 322; alternatively, the second transmission shaft 323 and the rotating shaft of the second motor 322 are of an integrated structure.

The following description is made with reference to the accompanying drawings for concrete entities of the first and second supporting and connecting

members

314 and 324.

As for the first supporting link 314, as shown in fig. 1, the first supporting link 314 is a synchronizing shaft which transversely penetrates the base 1, and a first driven wheel 3152 is provided on the synchronizing shaft and on the outer side of the base 1. Specifically, the synchronizing shaft penetrates through the base 1, and the portion of the synchronizing shaft extending out of the base 1 can be effectively supported, so that after the first driven wheel 3152 is mounted, the synchronizing shaft cannot be bent due to the pulling force of the first synchronizing belt 3153 on the first driven wheel 3152, and the axis of the first driven wheel 3152 is ensured to be parallel to the axis of the first driving wheel 3151.

Alternatively, as shown in fig. 2, the first supporting connection member 314 is a U-shaped bracket, the U-shaped bracket crosses over the base 1 and is disposed on the base 1, a first rotating shaft 3141 is disposed between a side portion of the U-shaped bracket and the base 1, and the first driven wheel 3152 is disposed on the first rotating shaft. Specifically, a U-shaped bracket is fixedly installed at the bottom of the base 1 and arranged across the base 1, and a first rotating shaft 3141 is arranged between the side portion of the U-shaped bracket and the side portion of the base 1. The two ends of the first rotating shaft 3141 are fixed by a U-shaped bracket and a base, respectively, so that firm and reliable support can be obtained to ensure that the axis of the first driven wheel 3152 and the axis of the second driven wheel 3252 are kept parallel.

Alternatively, as shown in fig. 3, the first supporting connection 314 includes two first auxiliary supporting frames 3142, the first auxiliary supporting frames are disposed at corresponding side portions of the base 1, a second rotating shaft 3143 is disposed between the first auxiliary supporting frames and the base 1, and the first driven wheel 3152 is disposed on the second rotating shaft.

As for the second support connector 324, as shown in fig. 3, the second support connector 324 includes a fixing block 3241 and a first support shaft 3242, the fixing block 3241 is provided with a shaft hole, the first support shaft 3242 penetrates the Y-axis moving platform 311, the fixing block 3241 and a second driven wheel 3252 are distributed on two sides of the Y-axis moving platform 311, the fixing block 3241 is provided on the Y-axis moving platform 311, the second driven wheel 3252 is provided at one end of the first support shaft 3242, and the other end of the one end of the first support shaft 3242 is provided in the shaft hole. Specifically, the first support shaft 3242 penetrates through the Y-axis moving platform 311, one end of the first support shaft 3242 is used for mounting the second driven wheel 3252, and the other end of the first support shaft 3242 is fixedly supported by the fixing block 3241, a portion of the first support shaft 3242 extending to the outer side of the Y-axis moving platform 311 can be effectively supported, and after the second driven wheel 3252 is mounted, the first support shaft 3242 cannot be bent due to the pulling force of the second synchronous belt 3253 on the second driven wheel 3252, so that the axis of the second driven wheel 3252 is kept parallel to the axis of the second driving wheel 3251. Or, the second supporting and connecting member 324 includes a second auxiliary support, the second auxiliary support is a U-shaped structure, a second supporting shaft is disposed on the second auxiliary support, the second driven wheel 3252 is disposed on the second supporting shaft, and the second auxiliary support is disposed on the Y-axis moving platform 311. Specifically, the mounting manner of the second auxiliary bracket may refer to the mounting manner of the first auxiliary bracket, which is not described herein again.

The utility model also provides an automatic sample injector, including the syringe, including above-mentioned over-and-under type needle frame, the syringe is installed the needle file of three-dimensional removal module in the over-and-under type needle frame.

The utility model provides a lifting needle frame and an automatic sample injector, which arranges a tray capable of sliding in a drawing way on a base to place sampling tubes, so that the sampling tubes can be placed in a plurality of jacks arranged in an array, and more sampling tubes can be placed by fully utilizing the limited area; meanwhile, the sample injection needle is driven to move to a designated position through the three-dimensional moving module, the three-dimensional moving module is correspondingly provided with the supporting connecting pieces on the Y axis and the X axis so as to meet the requirement of reliable installation of the driven wheel, the axes of the driven wheel and the driving wheel are parallel to each other, the phenomenon that the driven wheel is inclined due to the tension of the synchronous belt and then the step-out phenomenon is caused is avoided in the operation process, the whole structure of the lifting needle frame is more compact, more sampling tubes can be stored, and the use reliability is improved.

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

Claims

1. An elevating needle carriage, comprising:

a lifting mechanism provided with a lifting part capable of moving up and down;

a needle seat disposed on the lifting portion;

2. The elevating needle holder as claimed in claim 1, wherein the needle holder is provided with a needle hole for installing a sampling needle, and the pressure plate is provided with a through hole.

3. The elevating needle frame as claimed in claim 2, wherein the needle base is provided with a plurality of needle holes side by side, and the pressing plate is provided with a plurality of through holes arranged side by side.

4. The elevating needle frame as claimed in claim 3, wherein the through holes are coaxially arranged with the corresponding needle passing holes.

5. The elevating needle frame as claimed in claim 1, wherein the elevating mechanism comprises a mounting bracket, a slider, a screw rod and a driving motor, the slider is slidably disposed on the mounting bracket, the slider is provided with a threaded through hole, the screw rod is rotatably disposed in the threaded through hole, the driving motor is in transmission connection with the screw rod, and the pressing plate is disposed at a lower portion of the mounting bracket.

6. An autosampler comprising a housing and a needle, comprising the lift needle rack of any of claims 1-5, wherein the needle is disposed on a needle seat of the lift needle rack, and wherein the lift needle rack is disposed on the housing.

7. The autosampler of claim 6, wherein the lift mechanism in the lift pin rack is disposed on the housing.

8. The autosampler of claim 7, wherein the pressure plate in the lift pin rack is disposed on the housing.