CN210230724U

CN210230724U - Automatic sample injection needle

Info

Publication number: CN210230724U
Application number: CN201921043914.0U
Authority: CN
Inventors: Minghua Wu; 吴明华
Original assignee: Jiangsu Changli Testing Service Co Ltd
Current assignee: Jiangsu Changli Testing Service Co Ltd
Priority date: 2019-07-05
Filing date: 2019-07-05
Publication date: 2020-04-03
Anticipated expiration: 2029-07-05

Abstract

The utility model belongs to the technical field of the gas chromatography technique and specifically relates to an autoinjection needle, including last needle body, lower needle body, the cleaning sleeve body, push rod, go up the needle body and can dismantle the both ends of connecting at the cleaning sleeve body respectively with lower needle body, the push rod runs through in proper order and sets up at the inner chamber of last needle body, cleaning sleeve body and lower needle body, and the bottom of lower needle body is equipped with the syringe needle body, and the syringe needle body communicates with lower needle body inside, the inner chamber of the cleaning sleeve body is equipped with the washing annular on week, wash the annular and surround the outside at the push rod. The utility model discloses simple structure adopts sectional type integrated configuration, and the accumulation of impurity is avoided to the edulcoration of the beneficial syringe inner chamber, effectively prolongs the life of syringe.

Description

Automatic sample injection needle

Technical Field

The utility model relates to a gas chromatography technical field especially relates to an automatic sampling needle.

Background

Gas chromatograph and gas chromatograph-mass spectrometer have been generally equipped with the autosampler as the common apparatus in the detection laboratory, its main fittings autosampler is used extensively correspondingly, in the course that the injector extracts the sample solution and is used in the analysis, because there is certain space between needle body cavity and push rod, there is some sample solution that deposits on the needle body internal surface when the push rod extracts and discharges the sample solution in the needle body cavity, with the increase of the number of times of sample introduction, the impurity of these needle body cavities will cause the pollution for the subsequent sample introduction on the one hand; on the other hand, the deposits can make the sample extraction of the push rod difficult, and can cause the damage of the sample injection needle when the sample extraction is serious, so an automatic sample injection needle is provided.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing an automatic sample injection needle.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the design provides an autoinjection needle, includes the needle body, lower needle body, the cleaning sleeve body, push rod, go up the needle body and can dismantle the both ends of connecting at the cleaning sleeve body respectively with lower needle body, the push rod runs through the setting in proper order in the inner chamber of last needle body, cleaning sleeve body and lower needle body, and the bottom of lower needle body is equipped with the syringe needle body, and the syringe needle body communicates with lower needle body is internal, be equipped with the washing annular on the inner chamber circumference of the cleaning sleeve body, it surrounds the outside at the push rod to wash the annular.

Preferably, the both sides of the cleaning sleeve body are respectively provided with a cleaning liquid inlet and a cleaning liquid outlet, and the cleaning liquid inlet and the cleaning liquid outlet are communicated with the cleaning ring groove.

Preferably, both ends of the cleaning sleeve body are provided with threaded bosses, one ends of the upper needle body and the lower needle body facing the cleaning sleeve body are provided with threaded grooves matched with the threaded bosses, and the threaded bosses are in threaded connection in the threaded grooves.

Preferably, the butt joint of the thread boss and the thread groove is provided with a sealing ring, the diameter of the outer ring of the sealing ring is the same as the inner diameter of the thread groove, and the diameter of the inner ring of the sealing ring is the same as the inner diameters of the upper needle body and the lower needle body.

Preferably, the upper needle body, the lower needle body and the cleaning sleeve body are all transparent structures, and the lower needle body is provided with continuous scales along the length direction of the lower needle body.

Preferably, a handle made of rubber is arranged at one end of the push rod, which is positioned on the outer side of the upper needle body.

Preferably, the length of the upper needle body is smaller than that of the lower needle body.

The utility model provides an autoinjection needle, beneficial effect lies in:

(1) the utility model discloses simple structure adopts sectional type integrated configuration, can carry out the split to regularly independently clear up every part is inside, the inside impurity of beneficial appearance needle clears away.

(2) The utility model discloses the accessible cleaning sleeve body effectively washs push rod outer wall and last needle body and the internal wall of lower needle, can effectively clear away the impurity in the injection needle inner chamber, avoids the accumulation of impurity, effectively prolongs the life of injection needle.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic view of a three-dimensional structure of an automatic sampling needle provided by the present invention;

fig. 2 is a schematic view of an exploded structure of an automatic sampling needle according to the present invention;

fig. 3 is a schematic view of an internal structure of an automatic sampling needle according to the present invention;

fig. 4 is a schematic view of the internal structure of the cleaning sleeve body of the present invention.

Labeled as: the needle comprises an upper needle body 1, a lower needle body 2, a cleaning sleeve body 3, a push rod 4, a needle head body 5, a handle 6, a cleaning liquid inlet 7, a cleaning liquid outlet 8, a thread boss 9, a thread groove 10, a sealing ring 11, a cleaning ring groove 12 and scales 13.

Detailed Description

The present invention will be further described with reference to the following specific examples. These examples are provided only for illustrating the present invention and are not intended to limit the scope of the present invention. In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "provided" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The structural features of the present invention will now be described in detail with reference to the accompanying drawings.

Referring to fig. 1-4, an automatic sample injection needle comprises an upper needle body 1, a lower needle body 2, a cleaning sleeve body 3 and a push rod 4, wherein the upper needle body 1 and the lower needle body 2 are detachably connected to two ends of the cleaning sleeve body 3 respectively, the push rod 4 is arranged in inner cavities of the upper needle body 1, the cleaning sleeve body 3 and the lower needle body 2 in a penetrating manner in sequence, a needle head body 5 is arranged at the bottom of the lower needle body 2, the needle head body 5 is communicated with the inner part of the lower needle body 2, a cleaning annular groove 12 is arranged on the inner cavity of the cleaning sleeve body 3 in the circumferential direction, and the cleaning annular groove 12.

The utility model discloses an autoinjection needle, simple structure adopts sectional type integrated configuration, can carry out the split to regularly independently clear up every partial inside, the inside impurity of beneficial introduction needle clears away, and the accessible cleaning sleeve body effectively washs push rod outer wall and last needle body and lower needle body inner wall, can effectively clear away the impurity in the introduction needle inner chamber, avoids the accumulation of impurity, effectively prolongs the life of introduction needle.

Specifically, when in use, the upper needle body 1 and the lower needle body 2 are respectively arranged at two ends of the cleaning sleeve body 3, after sample injection analysis is completed, cleaning liquid is introduced into the cleaning sleeve body 3 on the next step, the cleaning liquid flows through the cleaning ring groove 12 and washes the rod section of the push rod 4 in the cleaning ring groove 12, on the next step, the push rod 4 is slowly drawn out towards the outer side, the flowing cleaning liquid in the cleaning ring groove 12 can continuously clean the push rod 4 in the drawing process until the bottommost end of the push rod 4 enters the inner cavity of the upper needle body 1, the push rod 4 is stopped to be drawn out, so that the outer wall of the push rod 4 is effectively cleaned, the solution deposition on the outer wall of the push rod 4 is avoided, at the moment, the cleaning liquid in the cleaning ring groove 12 can fill the whole inner cavity of the lower needle body 2 and is discharged from the needle body 5, the inner cavity wall of the lower needle body 2 is effectively cleaned, after the sampling needle is cleaned, the supply of the cleaning liquid to the inside of the cleaning sleeve body 3 is stopped, the accumulation of impurities in the sampling needle can be effectively avoided after the cleaning, and the service life of the sampling needle is effectively prolonged.

Referring to fig. 3 and 4, further, a cleaning liquid inlet 7 and a cleaning liquid outlet 8 are respectively arranged at two sides of the cleaning sleeve body 3, and the cleaning liquid inlet 7 and the cleaning liquid outlet 8 are both communicated with the cleaning ring groove 12.

The cleaning liquid inlet 7 and the cleaning liquid outlet 8 are arranged, so that cleaning liquid can be introduced into the cleaning sleeve body 3, a flowing cleaning liquid is formed in the cleaning ring groove 12, and the push rod 4 can be continuously cleaned.

Referring to fig. 2 and 3, further, both ends of the cleaning sleeve body 3 are provided with thread bosses 9, one ends of the upper needle body 1 and the lower needle body 2 facing the cleaning sleeve body 3 are provided with thread grooves 10 matched with the thread bosses 9, and the thread bosses 9 are in threaded connection in the thread grooves 10.

The threaded boss 9 and the threaded groove 10 are arranged, so that detachable connection of the upper needle body 1, the lower needle body 2 and the cleaning sleeve body 3 can be realized.

Referring to fig. 2 and 3, further, sealing rings 11 are arranged at the butt joints of the thread bosses 9 and the thread grooves 10, the outer ring diameter of each sealing ring 11 is the same as the inner diameter of the thread groove 10, and the inner ring diameter of each sealing ring 11 is the same as the inner diameters of the upper needle body 1 and the lower needle body 2.

The sealing ring 11 is arranged, so that the connection tightness and continuity of the upper needle body 1, the lower needle body 2 and the cleaning sleeve body 3 can be effectively ensured, and the push rod 4 can smoothly pass through the upper needle body 1, the lower needle body 2 and the cleaning sleeve body 3.

Referring to fig. 1, further, the upper needle body 1, the lower needle body 2 and the cleaning sleeve body 3 are all transparent structures, and the lower needle body 2 is provided with continuous scales 13 along the length direction thereof.

The transparent structures of the upper needle body 1, the lower needle body 2 and the cleaning sleeve body 3 facilitate the observation of the solution inside the liquid inlet needle, and the scales 13 are arranged to facilitate the control of the liquid inlet amount.

Referring to fig. 1, further, a rubber handle 6 is disposed at one end of the push rod 4 located outside the upper needle body 1.

The handle 6 is arranged to facilitate the pumping and pushing of the push rod 4 and the liquid inlet operation.

Referring to fig. 1 and 3, further, the length of the upper needle body 1 is smaller than that of the lower needle body 2.

Go up the length of needle body 1 and be less than the length of needle body 2 down, favourable feed liquor is deposited in needle body 2 down like this, can not have solution to get into in the messenger in the needle body 1, makes things convenient for the edulcoration operation in later stage like this, simultaneously, goes up needle body 1 and has good supporting role to push rod 4, after push rod 4 takes out down needle body 2, its bottom can support in last needle body 1, avoids when wasing push rod 4, push rod 4 is taken out completely, the operation in favourable appearance needle later stage of advancing.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides an autoinjection needle, includes needle body (1), needle body (2) down, the cleaning sleeve body (3), push rod (4), a serial communication port, go up needle body (1) and needle body (2) down and can dismantle the both ends of connecting at the cleaning sleeve body (3) respectively, push rod (4) run through in proper order and set up in the inner chamber of last needle body (1), cleaning sleeve body (3) and needle body (2) down, the bottom of needle body (2) is equipped with syringe needle body (5) down, syringe needle body (5) and needle body (2) inside are linked together down, be equipped with on the inner chamber circumference of cleaning sleeve body (3) and wash annular (12), wash annular (12) and surround the outside at push rod (4).

2. The automatic sample injection needle according to claim 1, wherein a cleaning liquid inlet (7) and a cleaning liquid outlet (8) are respectively disposed on two sides of the cleaning sleeve body (3), and the cleaning liquid inlet (7) and the cleaning liquid outlet (8) are both communicated with the cleaning ring groove (12).

3. The autoinjection needle according to claim 1, characterized in that both ends of the cleaning sleeve body (3) are provided with thread bosses (9), one ends of the upper needle body (1) and the lower needle body (2) facing the cleaning sleeve body (3) are provided with thread grooves (10) matched with the thread bosses (9), and the thread bosses (9) are screwed in the thread grooves (10).

4. The autoinjection needle according to claim 3, characterized in that, the butt joints of the thread boss (9) and the thread groove (10) are provided with a sealing ring (11), the outer ring diameter of the sealing ring (11) is the same as the inner diameter of the thread groove (10), and the inner ring diameter of the sealing ring (11) is the same as the inner diameters of the upper needle body (1) and the lower needle body (2).

5. The autoinjection needle according to claim 1, characterized in that the upper needle body (1), the lower needle body (2) and the cleaning sleeve body (3) are all transparent structures, and the lower needle body (2) is provided with continuous scales (13) along the length direction thereof.

6. The autoinjection needle according to claim 1, characterized in that one end of the push rod (4) located outside the upper needle body (1) is provided with a handle (6) made of rubber.

7. An autoinjection needle according to claim 1, characterized in that the length of the upper needle body (1) is smaller than the length of the lower needle body (2).