CN219996991U - Handheld quantitative sample injection device of chromatograph - Google Patents
Handheld quantitative sample injection device of chromatograph Download PDFInfo
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- CN219996991U CN219996991U CN202320853082.9U CN202320853082U CN219996991U CN 219996991 U CN219996991 U CN 219996991U CN 202320853082 U CN202320853082 U CN 202320853082U CN 219996991 U CN219996991 U CN 219996991U
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- 238000002347 injection Methods 0.000 title claims abstract description 39
- 239000007924 injection Substances 0.000 title claims abstract description 39
- 239000011521 glass Substances 0.000 claims description 8
- 238000005452 bending Methods 0.000 abstract description 5
- 238000001514 detection method Methods 0.000 abstract description 2
- 238000004587 chromatography analysis Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 3
- 238000005070 sampling Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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Abstract
The utility model belongs to the technical field of detection equipment, and particularly relates to a handheld quantitative sample injection device for chromatography, which comprises a microsyringe, wherein the microsyringe comprises a needle cylinder, a needle head, a needle rod, an outer cylinder, an inner cylinder, a push-pull rod, a spring and a limiting mechanism, wherein a first limiting convex body is circumferentially arranged at the middle upper part of the inner wall of the outer cylinder, a second limiting convex body which is in contact with the inner wall of the outer cylinder is circumferentially arranged at the lower end of the push-pull rod, the push-pull rod penetrates through the top surface of the outer cylinder, and the second limiting convex body is positioned right below the first limiting convex body; the push-pull rod is sleeved outside the inner cylinder; the needle cylinder is fixed in the inner cylinder, the needle rod is fixed in the push-pull rod and penetrates through the top surface of the inner cylinder, a baffle is circumferentially arranged between the lower part of the inner wall of the outer cylinder and the outer wall of the inner cylinder, and the spring is sleeved outside the inner cylinder and is arranged between the bottom of the push-pull rod and the baffle. The utility model can effectively prevent the needle cylinder from being broken and the needle rod from bending and deforming, and is convenient for observing scales.
Description
Technical Field
The utility model belongs to the technical field of detection equipment, and particularly relates to a chromatographic handheld quantitative sample injection device.
Background
The appearance of the microsyringe is an important innovation in the fields of medical instruments and analysis and assay, and the microsyringe has the characteristics of precision in manufacturing, small volume, light weight, high precision and the like; but also has the following disadvantages: because the needle cylinder is made of glass, the needle cylinder is easy to break under external force; the needle bar is slim and is easy to bend and deform; the scale is tiny, so that the scale is not easy to observe; accidental errors can not be eliminated by adopting manual sampling, and if an automatic sampler is matched, the automatic sampler is high in price and inconvenient to maintain.
Disclosure of Invention
In order to solve the problems in the prior art, the utility model provides a chromatographic hand-held quantitative sample injection device which can effectively prevent the needle cylinder from being broken and the needle rod from bending and deforming and is convenient for observing scales.
In order to achieve the above purpose, the technical scheme adopted is as follows:
the utility model provides a chromatographic hand-held quantitative sample injection device, which comprises a microsyringe, an outer cylinder, an inner cylinder, a push-pull rod, a spring and a limiting mechanism, wherein the microsyringe comprises a needle cylinder, a needle head and a needle rod, a first limiting convex body is circumferentially arranged at the middle upper part of the inner wall of the outer cylinder, a second limiting convex body which is in contact with the inner wall of the outer cylinder is circumferentially arranged at the lower end of the push-pull rod, the push-pull rod penetrates through the top surface of the outer cylinder, and the second limiting convex body is positioned right below the first limiting convex body; the inner cylinder body is arranged in the outer cylinder body, and the push-pull rod is sleeved outside the inner cylinder body; the needle cylinder is fixed in the inner cylinder body, the needle rod is fixed in the push-pull rod and penetrates through the top surface of the inner cylinder body, a baffle is circumferentially arranged between the lower part of the inner wall of the outer cylinder body and the outer wall of the inner cylinder body, and the spring is sleeved outside the inner cylinder body and is arranged between the bottom of the push-pull rod and the baffle; the needle head is exposed in the outer space of the bottom surface of the outer cylinder body; the limiting mechanism is arranged on the outer wall of the outer cylinder body and used for limiting the push-pull rod.
According to the chromatographic hand-held quantitative sample injection device, preferably, the upper end of the needle rod is fixed in the push-pull rod through the needle rod fixing clamping groove, and the upper end of the needle cylinder is fixed in the inner cylinder through the needle cylinder fixing clamping groove.
According to the chromatographic hand-held quantitative sample injection device, preferably, the lower part of the outer cylinder body is provided with the mounting window opposite to the scale mark side of the needle cylinder, and the mounting window is fixedly provided with the transparent shell of the magnifying glass.
The chromatographic hand-held quantitative sample injection device according to the utility model preferably further comprises a handle arranged on the outer wall of the outer cylinder.
According to the chromatographic handheld quantitative sample injection device, preferably, the inner side of the handle is provided with the limiting rod, the limiting rod is provided with the first vertical open groove, and the limiting block is fixed in the first vertical open groove through the screw.
According to the chromatographic hand-held quantitative sample injection device, preferably, the wall of the outer cylinder body is provided with the second vertical open groove corresponding to the first vertical open groove, and the limiting block extends into the outer cylinder body from the second vertical open groove.
The chromatographic handheld quantitative sample injection device provided by the utility model preferably further comprises a sample injection port matched assembly, wherein the sample injection port matched assembly comprises an upper large hollow sleeve and a lower small hollow sleeve, and a sample injection port is formed in the center of the bottom of the upper large hollow sleeve.
According to the chromatographic hand-held quantitative sample injection device, preferably, the wall of the upper large hollow sleeve is provided with a third vertical open slot; the inner wall of the lower small hollow sleeve is provided with threads.
According to the chromatographic hand-held quantitative sample injection device of the utility model, preferably, the outer diameter of the outer cylinder is equal to the inner diameter of the upper large hollow sleeve.
By adopting the technical scheme, the beneficial effects are that:
1. the glass syringe of the microsyringe is fixed in the inner cylinder, and the inner cylinder and the outer cylinder effectively protect the syringe and prevent the syringe from being broken due to external force. The needle bar of the microsyringe is fixed in the push-pull rod, and the push-pull rod drives the needle bar to linearly lift along the inner wall of the outer cylinder body, so that the needle bar is effectively prevented from bending deformation caused by the problem of stress direction. The first limiting convex body can effectively prevent the needle rod of the push-pull rod from being separated from the needle cylinder due to overlong pulling.
2. The push rod is limited by the screw adjusting limiting block at the position of the limiting rod, so that quantitative absorption and quantitative sample injection are realized, and accidental errors caused by manual sample injection are effectively solved. The outer cylinder body is provided with the magnifying glass transparent shell, and the inner wall of the inner cylinder body opposite to the graduation marks of the needle cylinder is coated with a white coating, so that the graduation can be observed when the device is convenient to use, and the sample injection amount can be adjusted more accurately. The injection port matching component can enable the needle head of the microsyringe to be inserted into the injection port in a directional and accurate way, and the needle head part of the microsyringe is protected. The chromatographic hand-held quantitative sample injection device has the advantages of simple structure, low cost and convenient maintenance.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present utility model, the following description will briefly explain the drawings of the embodiments of the present utility model. Wherein the showings are for the purpose of illustrating some embodiments of the utility model only and not for the purpose of limiting the same.
FIG. 1 is a schematic structural diagram of a chromatographic hand-held quantitative sample injection device according to an embodiment of the utility model;
FIG. 2 is a schematic front view of a sample port kit according to an embodiment of the present utility model;
fig. 3 is a schematic top view of a sample port kit according to an embodiment of the present utility model.
The meaning represented by the numbers in the figures is:
1. the syringe comprises a syringe body, a needle head, a needle rod, a needle cylinder, a cylinder body, a push-pull rod, a spring, a first limiting convex body, a second limiting convex body, a baffle plate, a third vertical open slot, a needle rod fixing clamping slot, a syringe fixing clamping slot, a magnifying glass transparent shell, a handle, a limiting rod, a first vertical open slot, a screw, a limiting block, a large upper hollow sleeve, a small lower hollow sleeve and a sample inlet.
Detailed Description
An exemplary embodiment of the present utility model will be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the utility model are shown. Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art.
As shown in fig. 1, the chromatographic hand-held quantitative sample injection device of the embodiment comprises a microsyringe, wherein the microsyringe comprises a syringe 1, a needle head 2 and a needle rod 3; still include outer barrel 4, inner barrel 5, push-and-pull rod 6, spring 7 and stop gear, the upper portion is provided with first spacing convex body 8 along the circumference in the inner wall of outer barrel 4, the lower extreme of push-and-pull rod 6 is provided with the second spacing convex body 9 that contacts with outer barrel 4 inner wall along the circumference, push-and-pull rod 6 runs through the top surface of outer barrel 4, and the second spacing convex body 9 of lower extreme is located first spacing convex body 8 under, can effectually prevent that push-and-pull rod 6 from leading to needle bar 3 and cylinder 1 separation because of the pull overlength through first spacing convex body 8. The inner cylinder 5 is arranged inside the outer cylinder 4, and the push-pull rod 6 is sleeved outside the inner cylinder 5. The upper end of the needle cylinder 1 is fixed in the inner cylinder body 5 through the needle cylinder fixing clamping groove 13, the upper end of the needle rod 3 is fixed in the push-pull rod 6 through the needle rod fixing clamping groove 12 and penetrates through the top surface of the inner cylinder body 5, so that the firm fixation of the microsyringe is realized, the glass needle cylinder 1 is effectively protected by the inner cylinder body 5 and the outer cylinder body 4, and the breakage of the needle cylinder 1 caused by external force is prevented. A baffle 10 is circumferentially arranged between the lower part of the inner wall of the outer cylinder 4 and the outer wall of the inner cylinder 5, a spring 7 is sleeved outside the inner cylinder 5 and is arranged between the bottom of the push-pull rod 6 and the baffle 10, and the effect of automatically lifting the needle bar 3 can be realized by utilizing the elasticity of the spring 7, so that the microsyringe is more rapid and convenient when absorbing samples. The needle 2 is exposed to the outside space of the bottom surface of the outer cylinder 4. The limiting mechanism is arranged on the outer wall of the outer cylinder 4 and is used for limiting the push-pull rod 6. The push-pull rod 6 drives the needle rod 3 to linearly lift along the inner wall of the outer cylinder 4, so that the needle rod 3 is effectively prevented from bending deformation caused by the problem of the stress direction.
The lower part of the outer cylinder body 4 is provided with a mounting window opposite to the scale mark side of the needle cylinder 1, a magnifying glass transparent shell 14 with a magnifying effect is fixedly mounted on the mounting window, a white coating layer is coated on the inner wall of the inner cylinder body 5 opposite to the scale mark of the needle cylinder 1, scales can be observed when the device is convenient to use, and the sample injection amount is adjusted more accurately.
The outer wall of the outer cylinder body 4 is provided with a handle 15, a limit rod 16 is fixed on the inner side of the handle 15, a first vertical open groove 17 is formed in the limit rod 16, a limit block 19 is fixed to the first vertical open groove 17 through a screw 18, a second vertical open groove corresponding to the first vertical open groove 17 is formed in the cylinder wall of the outer cylinder body 4, and the limit block 19 extends into the outer cylinder body 4 from the second vertical open groove and is used for blocking the second limit protrusion 9 to move upwards. The position of the limiting block 19 on the limiting rod 16 is adjusted through the screw 18, so that adjustable quantitative setting in a certain range is realized.
Besides the above structure, as shown in fig. 2 and 3, the device further comprises a sample inlet matching component which can be made of alloy materials and has the characteristics of high temperature resistance, difficult deformation and the like, the sample inlet matching component comprises an upper large hollow sleeve 20 and a lower small hollow sleeve 21 which are integrally connected, a sample inlet 22 is formed in the center of the bottom of the upper large hollow sleeve 20, a third vertical open groove 11 is formed in the wall of the upper large hollow sleeve 20, threads are formed in the inner wall of the lower small hollow sleeve 21 and are arranged on the chromatograph through the threads, and the design of the third vertical open groove 11 is used for not obstructing the handle 15 and the limit rod 16, so that the outer cylinder 4 is inserted into the bottom and is convenient to clean the inside of the sample inlet 22 and observe whether the sample inlet leaks or not. The outer diameter of the outer cylinder 4 is equal to the inner diameter of the upper large hollow sleeve 20, so that the needle head 2 of the microsyringe is vertically and downwards oriented to be accurately inserted into the sample inlet 22 during sample injection, and the bending deformation of the needle head 2 caused by the problem of force direction during sample injection can be effectively prevented.
The working principle is as follows:
firstly, the position of a limiting block 19 on a limiting rod 16 is adjusted according to the required sample injection amount, a needle head 2 is inserted into a sample, a push-pull rod 6 is pressed to push a needle rod 3 to the bottom, the push-pull rod 6 is slowly released, the push-pull rod 6 slowly rises under the action of a spring 7, and the effect of replacing a microsyringe can be achieved through repeated operation; then push needle bar 3 to cylinder 1 bottom while squeezing spring 7, hold handle 15 and can promote stopper 19 through the hand and get into in the outer barrel 4 with effort, under the spacing dual function of spring 7 elasticity and stopper 19, realize waiting to take a sample in the sample container ration, effectively solve the occasional error that produces because of the manual sampling. When the chromatograph is injected, the injection port matching component is installed on the chromatograph, and the cylinder body provided with the microsyringe is inserted into the upper large hollow sleeve 20 for injection operation.
In the description of the present utility model, it should be understood that the expressions "first" and "second" are used to describe various elements of the present utility model and do not denote any order, quantity, or importance, but rather are used to distinguish one element from another.
It should be noted that when an element is referred to as being "connected," "coupled," or "connected" to another element, it can be directly connected, coupled, or connected, but it is understood that there may be intervening elements present therebetween; i.e. the positional relationship of direct connection and indirect connection is covered.
It should be noted that the use of the terms "a" or "an" and the like do not necessarily denote a limitation of quantity. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items.
It should be noted that terms like "upper," "lower," "left," "right," and the like, which indicate an orientation or a positional relationship, are merely used to indicate a relative positional relationship, and are provided for convenience in describing the present utility model, and do not necessarily refer to devices or elements having a particular orientation, being constructed and operated in a particular orientation; when the absolute position of the object to be described is changed, the relative positional relationship may be changed accordingly.
Preferred embodiments for carrying out the utility model have been described in detail hereinabove, but it should be understood that these embodiments are merely illustrative and are not intended to limit the scope, applicability or configuration of the utility model in any way. The scope of the utility model is defined by the appended claims and equivalents thereof. Many modifications and variations of the foregoing embodiments will be apparent to those of ordinary skill in the art in light of the teachings of this utility model, which will fall within the scope of this utility model.
Claims (9)
1. The handheld quantitative chromatographic sample injection device comprises a microsyringe, wherein the microsyringe comprises a needle cylinder, a needle head and a needle rod, and is characterized by further comprising an outer cylinder, an inner cylinder, a push-pull rod, a spring and a limiting mechanism, wherein a first limiting convex body is circumferentially arranged at the middle upper part of the inner wall of the outer cylinder, a second limiting convex body which is in contact with the inner wall of the outer cylinder is circumferentially arranged at the lower end of the push-pull rod, the push-pull rod penetrates through the top surface of the outer cylinder, and the second limiting convex body is positioned right below the first limiting convex body; the inner cylinder body is arranged in the outer cylinder body, and the push-pull rod is sleeved outside the inner cylinder body; the needle cylinder is fixed in the inner cylinder body, the needle rod is fixed in the push-pull rod and penetrates through the top surface of the inner cylinder body, a baffle is circumferentially arranged between the lower part of the inner wall of the outer cylinder body and the outer wall of the inner cylinder body, and the spring is sleeved outside the inner cylinder body and is arranged between the bottom of the push-pull rod and the baffle; the needle head is exposed in the outer space of the bottom surface of the outer cylinder body; the limiting mechanism is arranged on the outer wall of the outer cylinder body and used for limiting the push-pull rod.
2. The chromatographic hand-held quantitative sample injection device according to claim 1, wherein the upper end of the needle rod is fixed in the push-pull rod through a needle rod fixing clamping groove, and the upper end of the needle cylinder is fixed in the inner cylinder through a needle cylinder fixing clamping groove.
3. The chromatographic hand-held quantitative sample injection device according to claim 1, wherein a mounting window is formed on the side, facing to the graduation line of the needle cylinder, of the lower part of the outer cylinder body, and a transparent shell of a magnifying glass is fixedly mounted on the mounting window.
4. The chromatographic hand-held quantitative sample injection device of claim 1, further comprising a handle disposed on the outer wall of the outer cylinder.
5. The chromatographic hand-held quantitative sample injection device according to claim 4, wherein a limiting rod is arranged on the inner side of the handle, a first vertical open groove is formed in the limiting rod, and a limiting block is fixed to the first vertical open groove through a screw.
6. The chromatographic hand-held quantitative sample injection device according to claim 5, wherein a second vertical open slot corresponding to the first vertical open slot is formed in the wall of the outer cylinder, and the limiting block extends into the outer cylinder from the second vertical open slot.
7. The device of claim 1, further comprising a sample port kit, the sample port kit comprising an upper large hollow sleeve and a lower small hollow sleeve, the sample port being provided in the center of the bottom of the upper large hollow sleeve.
8. The chromatographic hand-held quantitative sample injection device according to claim 7, wherein a third vertical open slot is formed in the wall of the upper large hollow sleeve; the inner wall of the lower small hollow sleeve is provided with threads.
9. The chromatographic hand-held quantitative sample injection device according to claim 7, wherein the outer diameter of the outer cylinder is equal to the inner diameter of the upper large hollow sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320853082.9U CN219996991U (en) | 2023-04-17 | 2023-04-17 | Handheld quantitative sample injection device of chromatograph |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320853082.9U CN219996991U (en) | 2023-04-17 | 2023-04-17 | Handheld quantitative sample injection device of chromatograph |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219996991U true CN219996991U (en) | 2023-11-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320853082.9U Active CN219996991U (en) | 2023-04-17 | 2023-04-17 | Handheld quantitative sample injection device of chromatograph |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219996991U (en) |
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2023
- 2023-04-17 CN CN202320853082.9U patent/CN219996991U/en active Active
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