CN217403835U

CN217403835U - Micro-sampling and transferring device matched with EA-IRMS stable isotope mass spectrometer

Info

Publication number: CN217403835U
Application number: CN202220373735.9U
Authority: CN
Inventors: 金诗迪; 郭进; 张平萍
Original assignee: Zhejiang University ZJU
Current assignee: Zhejiang University ZJU
Priority date: 2022-02-23
Filing date: 2022-02-23
Publication date: 2022-09-09
Anticipated expiration: 2032-02-23

Abstract

The utility model discloses a micro-sampling and transferring device which is matched with an EA-IRMS stable isotope mass spectrometer, comprising a hand-operated vibration hammer, a fixed frame, a sample stage and a sampler; a sample table for containing a weighing container is detachably fixed at the bottom of the fixing frame, and a hand-operated vibration hammer is detachably fixed at the top of the fixing frame; the hand-operated vibration hammer comprises a rocker and a vibration cone and can convert the rotary motion of the rocker into the up-and-down reciprocating motion of the vibration cone; the fixed frame is also detachably provided with a sampler; the sampler includes sample end and vibration end, and the vibration end is located the vibration awl below and can cooperate and produce the impact vibration effect, and the sample end hangs in weighing the container opening and can shake off the sample to weighing in the container under the impact vibration effect. The utility model discloses utilize dynamics and the frequency that mechanical component control knocked, improve the stability and the success rate of sample, avoid because the pollution that the artificial reason caused.

Description

Micro-sampling and transferring device matched with EA-IRMS stable isotope mass spectrometer

Technical Field

The utility model belongs to the instrument device field, concretely relates to supporting microsampling and transfer device who uses in EA-IRMS stable isotope mass spectrograph.

Background

The stable isotope technology has multiple special functions of tracing, integrating and indicating. It improves the ability of people to observe and recognize things to the molecular level, and opens up a new way for people to know the world. In China, the stable isotope technology is widely applied to the research fields of geology, agriculture, ecology, environment, food traceability and the like, and is used for exploring the ancient climate and the living environment of ancient human beings and the like.

At present, the technology of stable Isotope Ratio Mass Spectrometry (IRMS) and its peripheral equipment combined is relatively mature and perfect, wherein the element analyzer and isotope mass spectrometry (EA-IRMS) are the most frequently used solid sample stable isotope tracer technology at present. The method can be used for measuring carbon nitrogen hydrogen oxygen isotopes in the solid, such as carbon nitrogen hydrogen oxygen isotope ratio of plants, soil, sediments, pork, shells, syrup and the like.

When EA-IRMS technology is used for analysis, a weighing cup (a tin cup or a silver cup) is used for weighing a sample before sample injection, and the tin cup or the silver cup containing the sample is wrapped into a round ball with the diameter of about 2mm for sample injection. Depending on the sample content, the sample size is very small, typically between 10. mu.g and 10mg, and the sampling process is therefore cumbersome, inefficient and risks contamination. Because no proper sampling tool is available, the front end needle of the injection needle is commonly used for sampling in domestic laboratories at present. The problems that follow are many: firstly, the standard sample or the sample used in the experiment is generally expensive or rare, and the sample sampled by the needle can be drilled into the needle hole, thereby causing waste. Secondly, the sample is easy to be scattered on the operation table by matching with the conventional manual weighing technology (i.e. the needle head is held by the right hand, and the sample can be smoothly shaken off by the left hand when the right hand is tapped), and the tiny particles can cause pollution. Thirdly, the weighing technical requirements for experimenters are high, the weighing efficiency is low, and the waste of samples, tin cups and silver cups is easy to cause.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art and provide a trace sampling and transferring device which is matched with an EA-IRMS stable isotope mass spectrometer.

The utility model discloses the concrete technical scheme who adopts as follows:

the utility model provides a micro-sampling and transferring device which is matched with an EA-IRMS stable isotope mass spectrometer, comprising a hand-operated vibration hammer, a fixed frame, a sample stage and a sampler; a sample table for containing a weighing container is detachably fixed at the bottom of the fixing frame, and a hand-operated vibration hammer is detachably fixed at the top of the fixing frame; the hand-operated vibration hammer comprises a rocker and a vibration cone and can convert the rotary motion of the rocker into the up-and-down reciprocating motion of the vibration cone; the fixed frame is also detachably provided with a sampler; the sampler includes sample end and vibration end, and the vibration end is located the vibration awl below and can cooperate and produce the impact vibration effect, and the sample end hangs in weighing the container opening and can shake off the sample to weighing in the container under the impact vibration effect.

Preferably, the hand-operated vibration hammer comprises a rocker, a speed increaser, a shaft sleeve, an adjusting shaft, a cam and a vibration cone; the rocker is coaxially and rotatably connected with the cam through the speed increaser, and an adjusting shaft is arranged above the action surface of the cam; the adjusting shaft is coaxially sleeved with a shaft sleeve, and can axially realize linear motion in the shaft sleeve in an up-and-down reciprocating manner under the action of the cam; the top of the adjusting shaft is located outside the shaft sleeve and is connected with a vibration cone, and the vibration cone can move up and down along with the adjusting shaft and has an impact vibration effect on the vibration end of the sampler.

Further, the speed increaser comprises a first gear and a second gear, wherein the diameter of the first gear is smaller than that of the second gear; the rocker is connected with the second gear in a matching way through a key, the second gear is in meshing transmission fit with the first gear, and the first gear and the cam are coaxial and rotate synchronously.

Furthermore, speed increaser and axle sleeve all are fixed in on the fixed plate, the fixed plate is fixed in on the mount through fast twisting the spanner is detachable.

Furthermore, the bottom of the adjusting shaft is provided with a square head, the shaft sleeve is provided with a square hole section which can be matched with the adjusting shaft, and the rotary motion of the vibrating cone can be limited through the matching of the square hole section and the square head; the top of the shaft sleeve is provided with a limiting part for preventing the adjusting shaft from separating from the shaft sleeve.

Furthermore, the limiting part is a screw.

Preferably, the sample platform is provided with a plurality of holes for placing the weighing containers, and the sample platform can be fixed at the bottom of the fixing frame through a locking wrench.

Preferably, one side of the top of the fixing frame is provided with a plurality of first fixing grooves for fixing the sampler, and the other side of the top of the fixing frame is provided with a plurality of second fixing grooves for fixing the hand-operated vibration hammer.

Preferably, the sampling end of the sampler is a needle-shaped structure capable of dipping the sample, and the vibration end is made of rubber.

Preferably, the weighing container is a weighing cup.

Compared with the prior art, the utility model, following beneficial effect has:

(1) when using EA-IRMS technical analysis at present, objective existence is to the demand of sampling technique, but does not have the pertinence product at present on the market, and the utility model discloses a device has filled this vacancy just.

(2) The utility model discloses with the vertical suspension of sampling probe for the sample is difficult for unrestrained on the operation panel by a large scale, and the sample receives the pollution risk and reduces.

(3) The utility model discloses utilize dynamics and the frequency that mechanical component control knocked, improve the stability and the success rate of sample, avoid because the pollution that the artificial reason caused.

Drawings

Fig. 1 is a schematic structural diagram of the front side of the device of the present invention;

FIG. 2 is a schematic view of the back side of the device of FIG. 1;

FIG. 3 is a schematic structural view of a hand-operated vibratory hammer;

FIG. 4 is a schematic view of the construction of the bushing;

FIG. 5 is a schematic view of the structure of the sampling needle;

in the figure: 1, shaft sleeve; 2, fixing a frame; 3, a sample stage; 4, a sampler; 5 a first fixing groove; 6, vibrating a cone; 7 an adjustment shaft; 8, quickly screwing a wrench; 9 a second fixing groove; 10 locking a spanner; 11 a rocker; 12 a speed increaser; 13 a first gear; 14 a second gear; 15 cams; 16 a limit piece; 17 a sampling end; 18 a vibrating end; 19 weighing the container; 20 fixing the plate; 21 a circular bore section; 22 square hole sections; 23 square head.

Detailed Description

The invention will be further elucidated and described with reference to the drawings and the detailed description. The utility model discloses in the technical characteristics of each embodiment under the prerequisite that does not conflict each other, all can carry out corresponding combination.

As shown in fig. 1 and 2, for the utility model provides a pair of supporting microsampling and transfer device who uses in EA-IRMS stable isotope mass spectrograph, the utility model discloses a microsampling and transfer device can follow in the sample bottle with powder sample quick sampling and follow-up vibration transfer to the weighing cup of sample operation panel, the device mainly includes hand vibrohammer, mount 2, sample platform 3 and sampler 4, wherein, is fixed with the sample platform 3 that is used for holding weighing container 19 in the detachable bottom of mount 2, and the detachable top is fixed with hand vibrohammer. The hand-operated vibration hammer comprises a rocker 11 and a vibration cone 6, and can convert the rotary motion of the rocker 11 into the up-and-down reciprocating motion of the vibration cone 6. The fixed mount 2 is also detachably provided with a sampler 4. The sampler 4 comprises a sampling end 17 and a vibrating end 18, wherein the vibrating end 18 is positioned below the vibrating cone 6 and can be matched to generate an impact vibration effect, and the sampling end 17 is suspended in an opening of the weighing container 19 and can shake a sample down into the weighing container 19 under the impact vibration effect.

The hand-operated vibration hammer is mainly used for converting the rotation motion provided by the hand into the up-and-down reciprocating motion of the vibration cone 6 so as to continuously knock the sampler 4 to make the sample on the sampling end 17 fall into the weighing container 19 of the sample operating platform 3. As shown in fig. 3, for the utility model provides a pair of hand-operated vibration hammer's structure is formed, specifically as follows:

the hand-operated vibration hammer comprises a rocker 11, a speed increaser 12, a shaft sleeve 1, an adjusting shaft 7, a cam 15 and a vibration cone 6. The rocker 11 is coaxially and rotatably connected with a cam 15 through a speed increaser 12, and an adjusting shaft 7 is arranged above the action surface of the cam 15. The adjusting shaft 7 is coaxially sleeved with a shaft sleeve 1, and can axially realize vertical reciprocating linear motion in the shaft sleeve 1 under the action of a cam 15. The top of the adjusting shaft 7 is positioned outside the shaft sleeve 1 and is connected with a vibration cone 6, and the vibration cone 6 can move up and down along with the adjusting shaft 7 and generate impact vibration to the vibration end of the sampler 4.

In practice, the speed increaser 12 may comprise a first gear 13 and a second gear 14, the first gear 13 being smaller in diameter than the second gear 14. The rocker 11 is connected with a larger second gear 14 in the speed increaser 12 in a matching way through keys, the second gear 14 is meshed with the first gear 13 in a transmission matching way, and the first gear 13 and the cam 15 rotate coaxially and synchronously. The vibrating cone 6 is installed on the adjusting shaft 7 through screwing screws, and the adjusting shaft 7 is coaxially matched with the shaft sleeve 1 and can realize vertical reciprocating linear motion under the action of the cam 15. The speed increaser 12 and the shaft sleeve 1 are arranged on a fixing plate 20 through screws, and the fixing plate 20 is clamped in a second fixing groove 9 of the fixing frame 2 through a quick-screwing wrench 8. The whole regulating shaft 7 is of a cylindrical structure, and the bottom of the regulating shaft is provided with a square head 23. As shown in fig. 4, the inside of the shaft sleeve 1 is provided with a circular hole section 21 and a square hole section 22 from top to bottom, which can be matched with the adjusting shaft 7, and the rotation of the vibrating cone 6 can be limited by the matching of the square hole section 22 and the square head 23. A stopper 16 (e.g., a screw) is mounted on the top of the sleeve 1 to prevent the adjusting shaft 7 from being separated from the sleeve 1 during the up-and-down reciprocating linear motion.

A plurality of holes different in size are formed in the sample platform 3, so that weighing containers 19 different in specification can be placed conveniently, weighing containers 19 can adopt weighing cups, and the sample platform 3 can be fixed to the bottom of the fixing frame 2 through the locking wrench 10. A plurality of first fixed slots 5 for fixing the sampler 4 are formed in one side of the top of the fixed frame 2, and a plurality of second fixed slots 9 for fixing the hand-operated vibration hammer are formed in the other side of the top of the fixed frame.

As shown in fig. 5, the sampler 4 comprises a sampling end 17 and a vibrating end 18, wherein the sampling end 17 can adopt a flat and slender needle-like structure so as to facilitate the dipping of a sample; the vibrating end 18 may be made of rubber to facilitate the impact vibration in cooperation with the vibrating cone 6. The height of the holder 2 and the length of the sampler 4 need to be specially designed to ensure that the sampling end 17 is exactly suspended in the weighing container 19.

The method for sampling and transferring by using the device is as follows:

the device of the present invention is first installed according to fig. 1-5, the locking wrench 10 is loosened by rotation and the sample stage 3 is pushed into the fixing frame 2 from the front, and the locking wrench 10 is tightened by rotation to fix the sample stage 3. The vibration cone 6 is lifted up to disengage the square head 23 of the adjustment shaft 7 from the square hole 22 and the vibration cone 6 is rotated. The sample in the sample bottle is dipped through the sampling end 17 of the sampler 4 and the sampler 4 is stuck into the first fixing groove 5 in the fixing frame 2. The vibrating cone 6 is rotated again to be right above the sampler 4, the vibrating cone 6 is loosened, and the square head 23 of the adjusting shaft 7 is inserted into the square hole 22 of the shaft sleeve 1. The rocker 11 is shaken by hand, the rocker 11 drives the second gear 14 to rotate, the second gear 14 drives the first gear 13 to rotate, the first gear 13 drives the cam 15 to rotate, the cam 15 is matched with the adjusting shaft 7 to enable the adjusting shaft 7 to reciprocate up and down, and the adjusting shaft 7 drives the vibrating cone 6 to reciprocate up and down. The vibrating cone 6 strikes the vibrating end 18 of the top of the sampler 4 continuously to generate an impact, and the sampler 4 shakes the sample on the sampling end 17 into a weighing container 19 in the sample table 3 under the action of the impact. The addition of the sample in the first weighing container is now complete.

Subsequently, the quick wrench 8 is loosened to transfer the holder 20 into the adjacent second fixing groove 9, and is locked again by the quick wrench 8. The vibration cone 6 is lifted up to disengage the square head 23 of the adjustment shaft 7 from the square hole 22 and the vibration cone 6 is rotated. The sample in the sample bottle is dipped through the sampling end 17 of the sampler 4 and the sampler 4 is clamped into the first fixing groove 5 in the fixing frame 2. The vibrating cone 6 is rotated again to be right above the sampler 4, the vibrating cone 6 is loosened, and the square head 23 of the adjusting shaft 7 is inserted into the square hole 22 of the shaft sleeve 1. The rocker 11 is shaken by hand, the rocker 11 drives the second gear 14 to rotate, the second gear 14 drives the first gear 13 to rotate, the first gear 13 drives the cam 15 to rotate, the cam 15 is matched with the adjusting shaft 7 to enable the adjusting shaft 7 to reciprocate up and down, and the adjusting shaft 7 drives the vibrating cone 6 to reciprocate up and down. The vibrating cone 6 strikes the vibrating end 18 of the top of the sampler 4 continuously to generate an impact, and the sampler 4 shakes the sample on the sampling end 17 into a weighing container 19 in the sample table 3 under the action of the impact. By analogy, the transfer of the samples of the plurality of weighing containers 19 on the side of the sample stage 3 is completed.

And finally, loosening the locking wrench 10, taking the sample table 3 out of the fixed frame 2, rotating by 180 degrees, and then pushing the sample table into the fixed frame 2 again for locking. The steps are repeated to finish the transfer of the samples in the plurality of weighing containers 19 on the other side of the sample platform 3. After all samples have been taken and transferred, the weighing container 19 containing the samples is wrapped into a round pellet with a diameter of about 2mm and injected in EA-IRMS.

Finally, it should be noted that the above-mentioned embodiments illustrate only specific embodiments of the invention. Obviously, the present invention is not limited to the above embodiments, and many variations are possible. The sample can be transferred more times by increasing the size of the fixing frame and the number of weighing containers in the sample operating platform, and in addition, the vibration strength can be adjusted by adding a balance weight on the vibration cone, and the like. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the present invention should be considered as within the scope of the present invention.

Claims

1. A micro-sampling and transferring device matched with an EA-IRMS stable isotope mass spectrometer is characterized by comprising a hand-operated vibration hammer, a fixed frame (2), a sample table (3) and a sampler (4); a sample table (3) used for containing a weighing container (19) is detachably fixed at the bottom of the fixing frame (2), and a hand-operated vibration hammer is detachably fixed at the top; the hand-operated vibration hammer comprises a rocker (11) and a vibration cone (6), and can convert the rotary motion of the rocker (11) into the up-and-down reciprocating motion of the vibration cone (6); the fixed frame (2) is also detachably provided with a sampler (4); the sampler (4) comprises a sampling end (17) and a vibration end (18), wherein the vibration end (18) is positioned below the vibration cone (6) and can be matched to generate an impact vibration effect, and the sampling end (17) is suspended in an opening of the weighing container (19) and can shake a sample down into the weighing container (19) under the impact vibration effect.

2. The microsampling and transferring device according to claim 1, wherein the hand-operated vibration hammer comprises a rocker (11), a speed increaser (12), a bushing (1), an adjusting shaft (7), a cam (15) and a vibrating cone (6); the rocker (11) is coaxially and rotatably connected with a cam (15) through a speed increaser (12), and an adjusting shaft (7) is arranged above the action surface of the cam (15); the adjusting shaft (7) is coaxially sleeved with the shaft sleeve (1) and can axially realize linear motion in the shaft sleeve (1) in an up-and-down reciprocating manner under the action of the cam (15); the top of the adjusting shaft (7) is positioned outside the shaft sleeve (1) and is connected with a vibrating cone (6), and the vibrating cone (6) can move up and down along with the adjusting shaft (7) and generates impact vibration to the vibrating end of the sampler (4).

3. The microsampling and transfer device according to claim 2, characterised in that the speed increaser (12) comprises a first gear (13) and a second gear (14), the first gear (13) being of smaller diameter than the second gear (14); the rocker (11) is connected with a second gear (14) in a matching way through a key, the second gear (14) is meshed with a first gear (13) in a transmission matching way, and the first gear (13) and a cam (15) rotate coaxially and synchronously.

4. The microsampling and transfer device according to claim 2, wherein the speed increaser (12) and the sleeve (1) are fixed to a fixing plate (20), the fixing plate (20) being detachably fixed to the holder (2) by a quick-action wrench (8).

5. The microsampling and transferring device according to claim 2, wherein the bottom of the adjusting shaft (7) is a square head (23), the shaft sleeve (1) is provided with a square hole section (22) which can be matched with the adjusting shaft (7), and the rotating motion of the vibrating cone (6) can be limited through the matching of the square hole section (22) and the square head (23); the top of the shaft sleeve (1) is provided with a limiting piece (16) for preventing the adjusting shaft (7) from separating from the shaft sleeve (1).

6. The microsampling and transfer device of claim 5, wherein the stop (16) is a screw.

7. The microsampling and transferring device according to claim 1, wherein the sample stage (3) is provided with a plurality of holes for placing the weighing containers (19), and the sample stage (3) can be fixed at the bottom of the fixing frame (2) by a locking wrench (10).

8. The microsampling and transfer device of claim 1, wherein the top of the holder (2) has a plurality of first fixing slots (5) for fixing the sampler (4) on one side and a plurality of second fixing slots (9) for fixing a hand-operated vibration hammer on the other side.

9. The microsampling and transfer device according to claim 1, characterised in that the sampling end (17) of the sampler (4) is a needle-like structure capable of dipping a sample, and the vibrating end (18) is made of rubber.

10. The microsampling and transfer device according to claim 1, characterised in that the weighing container (19) is a weighing cup.