CN215218701U - a micro sampler - Google Patents
a micro sampler Download PDFInfo
- Publication number
- CN215218701U CN215218701U CN202120252462.8U CN202120252462U CN215218701U CN 215218701 U CN215218701 U CN 215218701U CN 202120252462 U CN202120252462 U CN 202120252462U CN 215218701 U CN215218701 U CN 215218701U
- Authority
- CN
- China
- Prior art keywords
- needle
- rod
- micro
- push rod
- liquid channel
- 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.)
- Expired - Fee Related
Links
- 239000007788 liquid Substances 0.000 claims abstract description 50
- 239000012528 membrane Substances 0.000 claims description 6
- 239000007787 solid Substances 0.000 abstract description 9
- 238000002347 injection Methods 0.000 abstract description 6
- 239000007924 injection Substances 0.000 abstract description 6
- 239000002245 particle Substances 0.000 abstract description 6
- 238000005070 sampling Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000013618 particulate matter Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
Images
Landscapes
- Sampling And Sample Adjustment (AREA)
Abstract
本实用新型涉及进样器技术领域，特别是涉及一种微量进样器，包括：针筒上安装有接头，针筒中设置有液体通道，接头与液体通道连通；针头与接头可拆卸连接；过滤器与针头可拆卸连接；活塞杆包括推杆，推杆的两端分别安装有活塞头和推板，活塞头安装在液体通道中并与针筒滑动连接；推板上安装有滑杆，针筒中设置有滑道，滑杆安装在滑道中，滑杆的长度为推杆长度和活塞头长度之和。本实用新型解决现有技术中微量进样器的进样体积误差大的问题。上述微量进样器在针头上设置过滤器，可以预先将样品液体中的固体颗粒物进行过滤，避免其堵塞微量进样器。上述微量进样器的活塞杆中设置有推杆和滑杆，推杆起到推动助力的作用，滑杆起到辅助定位液面的作用。
The utility model relates to the technical field of sample injectors, in particular to a micro sample injector, comprising: a joint is installed on a syringe, a liquid channel is arranged in the syringe, and the joint communicates with the liquid channel; the needle and the joint are detachably connected; The device is detachably connected with the needle head; the piston rod includes a push rod, the two ends of the push rod are respectively installed with a piston head and a push plate, the piston head is installed in the liquid channel and is slidably connected with the needle cylinder; a sliding rod is installed on the push plate, and the needle A slideway is arranged in the cylinder, the slidebar is installed in the slideway, and the length of the slide bar is the sum of the length of the push rod and the length of the piston head. The utility model solves the problem that the injection volume error of the micro-sampler in the prior art is large. In the above-mentioned micro-injector, a filter is arranged on the needle, which can filter the solid particles in the sample liquid in advance, so as to prevent them from clogging the micro-injector. A push rod and a slide rod are arranged in the piston rod of the above-mentioned micro-sampler, the push rod plays the role of pushing and assisting, and the slide rod plays the role of assisting in positioning the liquid level.
Description
Technical Field
The utility model relates to a sample injector technical field especially relates to a trace sample injector.
Background
The high performance liquid chromatograph and the gas chromatograph are common instruments such as teaching and scientific research institutions of colleges and universities, and a micro sample injector is required for injecting samples. The structure of a common microsyringe is similar to that of a medical injector, and the difference is that the push rod of the microsyringe is extremely thin, and because the volume of the microsyringe needs to be up to the micro-upgrade, some push rods are thin and have the diameter of about 0.5 mm.
In the prior art, the microsyringe is easy to block due to small pipe diameter, so that the problems of high damage rate of the microsyringe or large sampling volume error exist.
SUMMERY OF THE UTILITY MODEL
In view of the above shortcomings of the prior art, an object of the present invention is to provide a micro-sampler for solving the problem of large sampling volume error of the micro-sampler in the prior art. Above-mentioned microsyringe sets up the filter on the syringe needle, can filter the solid particle thing in the sample liquid in advance, avoids it to block the microsyringe. The piston rod of the microsyringe is provided with a push rod and a slide rod, the push rod plays a role in pushing assistance, and the slide rod plays a role in assisting in positioning the liquid level. Through filter and piston rod, both can avoid outside solid particulate matter to get into the microsyringe, thereby the position of confirming the liquid level that can be better again confirms the appearance volume of advancing.
To achieve the above and other related objects, the present invention provides a microsyringe, which comprises:
the needle cylinder is provided with a joint, a liquid channel is arranged in the needle cylinder, and the joint is communicated with the liquid channel;
the needle head is detachably connected with the joint;
the filter is detachably connected with the needle head;
the piston rod comprises a push rod, a piston head is installed at one end of the push rod, a push plate is installed at the other end of the push rod, and the piston head is installed in the liquid channel and is in sliding connection with the needle cylinder; the push plate is provided with a slide rod, a slide way is arranged in the needle cylinder, the slide rod is arranged in the slide way, and the length of the slide rod is equal to the sum of the length of the push rod and the length of the piston head.
Above-mentioned microsyringe sets up the filter on the syringe needle, can filter the solid particle thing in the sample liquid in advance, avoids it to block the microsyringe. The piston rod of the microsyringe is provided with a push rod and a slide rod, the push rod plays a role in pushing assistance, and the slide rod plays a role in assisting in positioning the liquid level. Through filter and piston rod, both can avoid outside solid particulate matter to get into the microsyringe, thereby the position of confirming the liquid level that can be better again confirms the appearance volume of advancing.
Because the length of the sliding rod is the sum of the length of the push rod and the length of the piston head, and the sliding rod and the push rod are both arranged on the push plate, the height of the tail end of the sliding rod is the same as that of the tail end of the piston head, and the sliding rod and the piston head are positioned on the same horizontal plane. The height of the tail end of the piston head is the height of the liquid level, so that the height of the liquid level is determined by the heights of the sliding rod and the piston head, and the problem of large sampling volume error is avoided. Because the needle cylinder is provided with the scale marks, the sampling amount is determined according to the corresponding positions of the scale marks before and after the movement of the slide rod and the piston head.
In an embodiment of the present invention, the axis of the syringe and the axis of the liquid passage coincide. The liquid channel is arranged in the middle of the needle cylinder, which is beneficial to the movement of the piston rod.
In an embodiment of the present invention, the liquid channel is close to one end of the push plate, and a limit ring is installed at one end of the push plate, and the limit ring and the needle cylinder are connected as a whole. The limiting ring is used for limiting the motion height of the piston head and preventing the piston head from falling off.
In an embodiment of the present invention, the needle cylinder is close to the outer side of the end portion of the push plate, and a fixing ring is installed on the outer side of the end portion of the push plate. When the fixing ring is mainly used for pressing by an operator, fingers are supported on the fixing ring, so that the pressing and sample introduction of the operator are facilitated.
In an embodiment of the utility model, the filter includes the casing, fixed pipe is installed to one side of casing, fixed pipe with the connection can be dismantled to the syringe needle, the appearance pipe is installed to the opposite side of casing, the appearance pipe with install the filter membrane between the fixed pipe.
The liquid is injected from the sample injection tube and then filtered by the filter membrane, and then enters the syringe from the needle head after being filtered.
In an embodiment of the present invention, the inner diameter of the fixing tube is the same as the outer diameter of the needle, so that the needle can be directly inserted into the fixing tube to suck the liquid. Because the internal diameter of fixed pipe is the same with the external diameter of syringe needle, so after the syringe needle inserts fixed pipe, can absorb liquid through pulling the piston rod and provide power to the function that the realization was absorbed liquid and was filtered.
In an embodiment of the present invention, the diameter of the piston head is the same as the inner diameter of the liquid channel, and the difference between the inner diameter of the liquid channel and the diameter of the push rod is 0.1-1 mm.
As mentioned above, the utility model discloses a microsyringe has following beneficial effect: above-mentioned microsyringe sets up the filter on the syringe needle, can filter the solid particle thing in the sample liquid in advance, avoids it to block the microsyringe. The piston rod of the microsyringe is provided with a push rod and a slide rod, the push rod plays a role in pushing assistance, and the slide rod plays a role in assisting in positioning the liquid level. Through filter and piston rod, both can avoid outside solid particulate matter to get into the microsyringe, thereby the position of confirming the liquid level that can be better again confirms the appearance volume of advancing.
Drawings
Fig. 1 is a schematic diagram of a micro sample injector according to an embodiment of the present invention.
Fig. 2 shows a schematic diagram of a micro-injector according to an embodiment of the present invention (the piston rod is in the low position).
Fig. 3 shows a second schematic diagram (with the piston rod in the high position) of a micro-injector according to an embodiment of the present invention.
Fig. 4 shows a schematic view of the connection between the syringe and the needle of a micro-injector according to an embodiment of the present invention.
Fig. 5 is a schematic view of a syringe of a microsyringe according to an embodiment of the present invention.
Fig. 6 is a schematic diagram of a piston rod of a micro-injector according to an embodiment of the present invention.
FIG. 7 shows a schematic view of a filter and needle connection of a microsyringe according to an embodiment of the present invention.
FIG. 8 shows a schematic diagram of a filter of a microsyringe according to an embodiment of the present invention.
Description of the element reference numerals
1-a needle cylinder; 2-a linker; 3-a liquid channel; 4-a needle head; 5-filter, 501-shell, 502-fixed tube, 503-sample tube, 504-filter membrane; 6-piston rod, 601-push rod, 602-piston head, 603-push plate, 604-slide bar; 7-a slideway; 8-a limit ring; 9-fixing ring.
Detailed Description
The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.
Please refer to fig. 1 to 8. It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the function that the present invention can produce and the purpose that the present invention can achieve. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.
Referring to fig. 1, the present invention provides a microsyringe, including:
referring to fig. 5, a joint 2 is mounted on a syringe 1, a liquid channel 3 is arranged in the syringe 1, the joint 2 is communicated with the liquid channel 3, and the axes of the syringe 1 and the liquid channel 3 are overlapped;
a needle 4, wherein the needle 4 is detachably connected with the connector 2 (see fig. 4);
referring to fig. 8, the filter 5 includes a housing 501, a fixed tube 502 is installed on one side of the housing 501, the fixed tube 502 is detachably connected to the needle 4 (referring to fig. 7), a sample inlet tube 503 is installed on the other side of the housing 501, and a filter membrane 504 is installed between the sample inlet tube 503 and the fixed tube 502; the inner diameter of the fixed tube 502 is the same as the outer diameter of the needle 4;
referring to fig. 6, the piston rod 6 comprises a push rod 601, one end of the push rod 601 is provided with a piston head 602, the other end of the push rod 601 is provided with a push plate 603, and the piston head 602 is installed in the fluid passage 3 and slidably connected with the syringe 1 (see fig. 2 and 3); a sliding rod 604 is arranged on the push plate 603, a slide way 7 is arranged in the needle cylinder 1, the sliding rod 604 is arranged in the slide way 7, and the length of the sliding rod 604 is the sum of the length of the push rod 601 and the length of the piston head 602; the diameter of the piston head 602 is the same as the inner diameter of the liquid channel 3, and the difference between the inner diameter of the liquid channel 3 and the diameter of the push rod 601 is 0.1-1 mm;
wherein, one end of the liquid channel 3 close to the push plate 603 is provided with a limit ring 8, and the limit ring 8 is connected with the needle cylinder 1 into a whole; the needle cylinder 1 is provided with a fixing ring 9 at the outer side of the end part close to the push plate 603.
The sampling and sample introduction process of the microsyringe comprises the following steps: firstly, the needle 4 is inserted into the fixed tube 502, then the sampling tube 503 is submerged below the liquid level, the piston rod 6 is pulled to make the liquid enter the sampling tube 503, and then the liquid enters the syringe 1 after being filtered by the filter membrane 504. After sampling, the filter 5 is removed, the liquid level is determined by observing the positions of the plunger 601 and the piston head 602, and then the piston rod 6 is pressed for sampling. In the sample injection process, the sample injection amount is determined by observing the positions of the push rod 601 and the piston head 602, and finally, the sample injection is realized.
To sum up, the utility model discloses a microsyringe sets up filter 5 on syringe needle 4, can filter the solid particle thing in the sample liquid in advance, avoids it to block up the microsyringe. The piston rod 6 of the microsyringe is provided with a push rod 601 and a slide rod 604, wherein the push rod 601 plays a role of pushing assistance, and the slide rod 604 plays a role of assisting in positioning the liquid level. Through the filter 5 and the piston rod 6, external solid particles can be prevented from entering the microsyringe, and the position of the liquid level can be better determined so as to determine the sample injection volume. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120252462.8U CN215218701U (en) | 2021-01-28 | 2021-01-28 | a micro sampler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120252462.8U CN215218701U (en) | 2021-01-28 | 2021-01-28 | a micro sampler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215218701U true CN215218701U (en) | 2021-12-17 |
Family
ID=79439060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120252462.8U Expired - Fee Related CN215218701U (en) | 2021-01-28 | 2021-01-28 | a micro sampler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215218701U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117890407A (en) * | 2024-01-18 | 2024-04-16 | 浙江恒达仪器仪表股份有限公司 | Full-form sedimentation monitoring system based on artificial simulation and energy spectrum technology |
-
2021
- 2021-01-28 CN CN202120252462.8U patent/CN215218701U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117890407A (en) * | 2024-01-18 | 2024-04-16 | 浙江恒达仪器仪表股份有限公司 | Full-form sedimentation monitoring system based on artificial simulation and energy spectrum technology |
| CN117890407B (en) * | 2024-01-18 | 2024-07-30 | 浙江恒达仪器仪表股份有限公司 | Full-form sedimentation monitoring system based on artificial simulation and energy spectrum technology |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN215218701U (en) | a micro sampler | |
| CN214050121U (en) | Quantitative extraction syringe suitable for medical anesthesia department uses | |
| CN211584688U (en) | Nuclear medicine injection ware | |
| CN104075912B (en) | Stratographic analysis sampling dosing device | |
| CN210155158U (en) | Sample feeding device for blood analyzer | |
| CN211301511U (en) | A non-invasive puncture guide needle | |
| CN213376701U (en) | Plasma is injector for amylase | |
| CN206593913U (en) | Check sampling accessory part | |
| CN216349781U (en) | Medical science inspection liquid multitube difference sampling device | |
| CN222022968U (en) | Small tube injection device | |
| CN221898892U (en) | Liquid sample preparation device | |
| CN205920097U (en) | Molecular imprinting solid -phase extraction liquid chromatogram syringe | |
| CN204373978U (en) | A kind of rapid filtering device for laboratory fluids sample | |
| CN221888468U (en) | A microinjection needle for the round window membrane of the mouse cochlea used in experiments | |
| CN202538080U (en) | Improved syringe filter needle | |
| CN216237096U (en) | Adsorption column for nucleic acid extraction and protein separation and purification | |
| CN201469773U (en) | Infusion apparatus with air filter | |
| CN211272910U (en) | A hospital endocrinology disease injection locator | |
| CN220854764U (en) | High-temperature-resistant composite chromatographic column for high-resolution liquid chromatograph | |
| CN216910363U (en) | Pipette filter device for basic experiments | |
| CN221926255U (en) | Water sample enrichment treatment device for methyl mercury determination | |
| CN216458060U (en) | Sampling and filtering device suitable for peristaltic pump | |
| CN221513117U (en) | Foaming device | |
| CN221667360U (en) | A sampling device for a medicinal dissolution instrument | |
| CN215822097U (en) | Cervical multiple spot immune cell preparation quantitative control device for injection |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211217 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |