CN215218701U - Micro sample injector - Google Patents
Micro sample injector Download PDFInfo
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- 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
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- microsyringe
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- needle
- push rod
- filter
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Abstract
The utility model relates to a sample injector technical field especially relates to a micro sample injector, include: 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 and a push plate are respectively arranged at two ends of the push rod, and the piston head is arranged in the liquid channel and is in sliding connection with the needle cylinder; the push plate is provided with a slide rod, the needle cylinder is internally provided with a slide way, the slide rod is arranged in the slide way, and the length of the slide rod is the sum of the length of the push rod and the length of the piston head. The utility model provides a problem that the appearance volume error of micro-injector is big among 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.
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)
1. A microsyringe, the microsyringe comprising:
the syringe comprises a syringe (1), wherein a joint (2) is installed on the syringe (1), a liquid channel (3) is arranged in the syringe (1), and the joint (2) is communicated with the liquid channel (3);
the needle head (4), the needle head (4) is detachably connected with the joint (2);
the filter (5), the said filter (5) is connected with said syringe needle (4) removably;
the piston rod (6) comprises a push rod (601), a piston head (602) is installed at one end of the push rod (601), a push plate (603) is installed at the other end of the push rod (601), and the piston head (602) is installed in the liquid channel (3) and is in sliding connection with the needle cylinder (1); the push plate (603) is provided with a sliding rod (604), the needle cylinder (1) is provided with a slide way (7), 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).
2. The microsyringe of claim 1, wherein: the needle cylinder (1) coincides with the axis of the liquid channel (3).
3. The microsyringe of claim 1, wherein: the liquid channel (3) is close to one end of the push plate (603) and is provided with a limiting ring (8), and the limiting ring (8) and the needle cylinder (1) are connected into a whole.
4. The microsyringe according to any of claims 1 to 3, characterized in that: the needle cylinder (1) is close to the outer side of the end part of the push plate (603) and is provided with a fixing ring (9).
5. The microsyringe of claim 1, wherein: the filter (5) comprises a shell (501), a fixed pipe (502) is installed on one side of the shell (501), and the fixed pipe (502) is detachably connected with the needle (4); a sample inlet pipe (503) is installed on the other side of the shell (501), and a filter membrane (504) is installed between the sample inlet pipe (503) and the fixing pipe (502).
6. The microsyringe of claim 5, wherein: the inner diameter of the fixed tube (502) is the same as the outer diameter of the needle (4).
7. The microsyringe of claim 1, wherein: 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120252462.8U CN215218701U (en) | 2021-01-28 | 2021-01-28 | Micro sample injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120252462.8U CN215218701U (en) | 2021-01-28 | 2021-01-28 | Micro sample injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215218701U true CN215218701U (en) | 2021-12-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120252462.8U Active CN215218701U (en) | 2021-01-28 | 2021-01-28 | Micro sample injector |
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| 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 active Active
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 |
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