CN211179675U

CN211179675U - Sample introduction device and sample analysis system

Info

Publication number: CN211179675U
Application number: CN201921996803.1U
Authority: CN
Inventors: 王丰琳; 周新颖; 于德秀; 唐涛; 李彤
Original assignee: Dalian Elite Analytical Instruments Co ltd
Current assignee: Dalian Elite Analytical Instruments Co ltd
Priority date: 2019-11-18
Filing date: 2019-11-18
Publication date: 2020-08-04
Anticipated expiration: 2029-11-18

Abstract

The utility model provides a sample feeding device and a sample analysis system, which relate to the technical field of chemical analysis equipment and comprise a sample needle, a driving mechanism, a switching valve group and a plurality of sample feeding mechanisms; the sample feeding mechanisms are used for being respectively connected with sample feeding pipelines of the plurality of analysis devices so as to respectively feed samples into the plurality of analysis devices; the driving mechanism and the sample needle are respectively connected with the switching valve group through pipelines, the switching valve group is respectively connected with the plurality of sample injection mechanisms through pipelines, the switching valve group can control the driving mechanism to be communicated with one of the plurality of sample injection mechanisms, and simultaneously, the sample injection mechanism communicated with the driving mechanism is communicated with the sample needle, so that the driving mechanism drives the sample needle to inject samples into the sample injection mechanism communicated with the driving mechanism. The utility model discloses an accessible a set is for many analytical equipment to advance the appearance, compares every analytical equipment and all is equipped with one set of sampling device's form, has reduced user's purchase, use and maintenance cost.

Description

Sample introduction device and sample analysis system

Technical Field

The utility model belongs to the technical field of chemical analysis equipment technique and specifically relates to a sampling device and sample analysis system are related to.

Background

Due to the application of modern technologies such as new materials, microelectronics, micromachining and the like, analytical chemistry, particularly instrumental analytical chemistry, has been greatly developed and advanced. The high performance liquid chromatography is an important branch of instrument analytical chemistry, and the super-strong separation and analysis capability of the high performance liquid chromatography enables the high performance liquid chromatography to be widely applied to various fields such as petrochemical industry, organic synthesis, physiological biochemistry, medicine and health, even space exploration and the like. Along with the improvement of the technology and the labor cost, the automation degree of the high performance liquid chromatography is higher and higher, the continuous working capacity of the liquid chromatography is greatly improved due to the appearance of an automatic device, the working efficiency is improved, and the labor cost of the instrument in use is reduced.

Autosampler instruments are costly and laboratories typically have multiple sets of liquid chromatography, which can increase the acquisition, use and maintenance costs for the user if each set is equipped with the device.

Other analytical devices such as liquid chromatography also have a problem that each analytical device needs to be equipped with a separate autosampler, resulting in high cost.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a sampling device to alleviate the automatic sample injector that exists among the prior art and can only be applicable to analytical equipment such as one set of liquid chromatogram usually, when having many analytical equipment, every analytical equipment all need be equipped with corresponding automatic sample injector, leads to with high costs technical problem.

An object of the utility model is to provide a sample analysis system to alleviate the automatic sample injector that exists among the prior art and can only be applicable to analytical equipment such as one set of liquid chromatogram usually, when having many analytical equipment, every analytical equipment all need be equipped with corresponding automatic sample injector, leads to with high costs technical problem.

The utility model provides a sampling device, include: the sampling device comprises a sample needle, a driving mechanism, a switching valve group and a plurality of sampling mechanisms;

the sample feeding mechanisms are used for being respectively connected with sample feeding pipelines of the analysis equipment so as to respectively feed samples into the analysis equipment;

the actuating mechanism with the sample needle respectively through the pipeline with switch the valves and connect, switch the valves and pass through the tube coupling respectively with a plurality of sampling mechanism, switch the valves and can control actuating mechanism with a plurality of sampling mechanism alternative intercommunications, and make simultaneously with the sampling mechanism and the sample needle intercommunication of actuating mechanism intercommunication, so that actuating mechanism drive sample needle to with advance the appearance in the sampling mechanism of actuating mechanism intercommunication.

Further, the switching valve group comprises a first switching valve group and a second switching valve group;

the first switching valve group is connected with the driving mechanism through a first pipeline, the first switching valve group is communicated with the plurality of sample feeding mechanisms through second pipelines respectively, and the first switching valve group can enable the driving mechanism to be communicated with one of the plurality of second pipelines so as to enable the driving mechanism to be communicated with one of the sample feeding mechanisms;

the second switching valve group is connected with the plurality of sample feeding mechanisms through third pipelines respectively, the second switching valve group is communicated with the sample needle through a fourth pipeline, and the fourth pipeline can be communicated with one of the plurality of sample feeding mechanisms through the second switching valve group so that the sample needle is communicated with one of the plurality of sample feeding mechanisms;

and the same sample injection mechanism can be simultaneously communicated with the driving mechanism and the sample needle under the action of the first switching valve group and the second switching valve group.

Furthermore, the sample feeding mechanism comprises a sample feeding control valve group and a quantitative ring, the second pipeline is connected between the first switching valve group and the sample feeding control valve group, and the third pipeline is connected between the sample feeding control valve group and the second switching valve group;

the quantitative ring is connected with the sample injection control valve group, the sample injection control valve group is also used for being connected with the corresponding analytical equipment through a sample injection pipeline, the sample injection control valve group has two states, when the sample injection control valve group is in a first state, the quantitative ring is communicated with the analytical equipment, and the quantitative ring injects a sample into the analytical equipment; when the sample injection control valve group is in a second state, the quantitative ring is connected between the third pipeline and the second pipeline, and the driving mechanism can drive the sample needle to inject samples to the quantitative ring.

Furthermore, the sample introduction device further comprises a cleaning mechanism, the cleaning mechanism comprises a cleaning agent storage bottle and a waste liquid storage piece, the cleaning agent storage bottle is communicated with the first switching valve group through a sixth pipeline, and the waste liquid storage piece is communicated with the second switching valve group through a seventh pipeline;

one end of the second pipeline, which is close to the first switching valve group, is communicated with the cleaning agent storage bottle or the driving mechanism through the first switching valve group; one end of the seventh pipeline close to the second switching valve group is switched on and off through the switching of the second switching valve group;

when the sample injection control valve group is in a second state, a second pipeline of the sample injection mechanism corresponding to the sample injection control valve group is communicated with the driving mechanism, a second pipeline of the sample injection mechanism corresponding to the sample injection control valve group is communicated with a third pipeline, and the third pipeline of the sample injection mechanism corresponding to the sample injection control valve group can be communicated with the seventh pipeline so as to inject samples into a quantitative ring of the sample injection mechanism corresponding to the sample injection control valve group;

when advance kind valves in the first state, this advance the second pipeline of the kind mechanism that kind valves correspond can with actuating mechanism and cleaner storage bottle alternative intercommunication, this advance the third pipeline of the kind mechanism that kind valves correspond can with the fourth pipeline with the alternative intercommunication of seventh pipeline.

Further, when the sample injection control valve group is in a first state:

the driving mechanism is communicated with a second pipeline of the sample feeding mechanism corresponding to the sample feeding control valve group, and a third pipeline of the sample feeding mechanism corresponding to the sample feeding control valve group is communicated with the fourth pipeline, so that the driving mechanism can drive a cleaning agent to clean the third pipeline, the fourth pipeline and the sample needle;

or should advance the second pipeline of the kind mechanism that kind valve unit corresponds with cleaner storage bottle intercommunication, should advance the third pipeline and the seventh pipeline intercommunication of the kind mechanism that kind valve unit corresponds, so that the cleaner of cleaner storage bottle loops through in second pipeline, third pipeline and the seventh pipeline flows into the waste liquid storage piece.

Further, the sample introduction device further comprises a sample bottle; the sample needle is movable between a sample vial or the waste reservoir; when the sample injection control valve group of any sample injection mechanism is in a second state, the sample needle is positioned in the sample bottle corresponding to the sample injection mechanism;

when any one third pipeline, fourth pipeline and sample needle of sampling mechanism wash under actuating mechanism's effect, when the sample needle removed to in the waste liquid storage piece, the sample needle be used for discharging the cleaner extremely in the waste liquid storage piece.

The driving mechanism is connected with the first valve port of the two-position three-way valve; a second valve port of the two-position three-way valve is connected with a fifth pipeline, and the fifth pipeline is connected with the first switching valve group and is communicated with the cleaning agent storage bottle through the first switching valve group; a third valve port of the two-position three-way valve is communicated with a first pipeline;

the two-position three-way valve has two states, when the two-position three-way valve is in the first state, a first valve port of the two-position three-way valve is communicated with a second valve port of the two-position three-way valve, and the driving mechanism absorbs the cleaning agent in the cleaning agent storage bottle; when the two-position three-way valve is in the second state, the first valve port of the two-position three-way valve is communicated with the third valve port, and the driving mechanism leads the sucked cleaning agent into the second pipeline communicated with the driving mechanism.

Furthermore, the number of the sample injection mechanisms is two, and the two sample injection mechanisms are respectively a first sample injection mechanism and a second sample injection mechanism;

the first switching valve group has two states, when the first switching valve group is in the first state, a second pipeline of the first sample injection mechanism is communicated with the driving mechanism, and a second pipeline of the second sample injection mechanism is communicated with the cleaning agent storage bottle;

when the first switching valve group is in a second state, a second pipeline of the second sample injection mechanism is communicated with the driving mechanism, and a second pipeline of the first sample injection mechanism is communicated with the cleaning agent storage bottle.

Furthermore, the number of the cleaning agent storage bottles is two, the two cleaning agent storage bottles are respectively used for placing the cleaning agents of the two sample feeding mechanisms, the cleaning agent storage bottle used for placing the cleaning agent of the first sample feeding mechanism is a first cleaning agent storage bottle, and the cleaning agent storage bottle used for placing the cleaning agent of the second sample feeding mechanism is a second cleaning agent storage bottle;

and a second valve port of the two-position three-way valve is communicated with one cleaning agent storage bottle through the first switching valve group.

Furthermore, the second switching valve group has two states, when the second switching valve group is in the first state, the third pipeline of the first sample injection mechanism is communicated with the sample needle, and the third pipeline of the second sample injection mechanism is communicated with the waste liquid storage part;

when the second switching valve group is in a second state, a third pipeline of the second sample injection mechanism is communicated with the sample needle, and a third pipeline of the first sample injection mechanism is communicated with the waste liquid storage piece.

Furthermore, the first switching valve group is a first two-position six-way valve, and six valve ports of the first two-position six-way valve are respectively a first valve port, a second valve port, a third valve port, a fourth valve port, a fifth valve port and a sixth valve port which are sequentially and annularly arranged;

the fifth valve port of the first two-position six-way valve is communicated with the second valve port of the two-position three-way valve, the fourth valve port of the first two-position six-way valve is communicated with the second cleaning agent storage bottle, the sixth valve port of the first two-position six-way valve is communicated with the first cleaning agent storage bottle, the second valve port of the first two-position six-way valve is communicated with the third valve port of the two-position three-way valve, the first valve port of the first two-position six-way valve is communicated with the second pipeline of the first sample feeding mechanism, and the third valve port of the first two-position six-way valve is communicated with the second pipeline of the second sample feeding mechanism;

when the first two-position six-way valve is in the first state: the fifth valve port of the first two-position six-way valve is communicated with the sixth valve port of the first two-position six-way valve, the second valve port of the first two-position six-way valve is communicated with the first valve port of the first two-position six-way valve, and the fourth valve port of the first two-position six-way valve is communicated with the third valve port;

when the first two-position six-way valve is in the second state: the fifth valve port of the first two-position six-way valve is communicated with the fourth valve port of the first two-position six-way valve, the second valve port of the first two-position six-way valve is communicated with the third valve port of the first two-position six-way valve, and the first valve port of the first two-position six-way valve is communicated with the sixth valve port.

Further, the second switching valve group is a second two-position six-way valve; the six valve ports of the second two-position six-way valve are respectively a first valve port, a second valve port, a third valve port, a fourth valve port, a fifth valve port and a sixth valve port which are sequentially arranged in an annular manner;

the first valve port of the second two-position six-way valve is used for being communicated with a third pipeline of the first sample feeding mechanism, the second valve port of the second two-position six-way valve is communicated with the fourth pipeline, and the third valve port of the second two-position six-way valve is used for being communicated with the third pipeline of the second sample feeding mechanism; a fourth valve port of the second two-position six-way valve is communicated with a seventh pipeline of the second sample feeding mechanism, a fifth valve port of the second two-position six-way valve is a closed valve port, and a sixth valve port of the second two-position six-way valve is communicated with the seventh pipeline of the first sample feeding mechanism;

when the second two-position six-way valve is in the first state, a first valve port of the second two-position six-way valve is communicated with a second valve port of the second two-position six-way valve, a third valve port of the second two-position six-way valve is communicated with a fourth valve port of the second two-position six-way valve, and a fifth valve port of the second two-position six-way valve is communicated with a sixth valve port of the second two-position six-way valve;

when the second two-position six-way valve is in the second state, the first valve port of the second two-position six-way valve is communicated with the sixth valve port of the second two-position six-way valve, the second valve port of the second two-position six-way valve is communicated with the third valve port of the second two-position six-way valve, and the fourth valve port of the second two-position six-way valve is communicated with the fifth valve port of the second two-position six-way valve.

Furthermore, the sample injection control valve group is a sample injection two-position six-way valve; six valve ports of the sample introduction two-position six-way valve are a first valve port, a second valve port, a third valve port, a fourth valve port, a fifth valve port and a sixth valve port which are sequentially arranged along a ring shape;

the first valve port and the fourth valve port of the two-position sample injection six-way valve are respectively connected with two ends of the quantitative ring, the second valve port of the two-position sample injection six-way valve is communicated with a third pipeline corresponding to a sample injection mechanism, the third valve port of the two-position sample injection six-way valve is communicated with a second pipeline corresponding to the sample injection mechanism, and the fifth valve port and the sixth valve port of the two-position sample injection six-way valve are respectively connected with a sample injection pipeline of the analysis equipment;

when the two-position two-way sample injection six-way valve is in the first state, a fourth valve port of the two-position two-way sample injection six-way valve is communicated with a fifth valve port of the two-position sample injection six-way valve, a first valve port of the two-position sample injection six-way valve is communicated with a sixth valve port of the two-position sample injection six-way valve, and a second valve port of the two-position sample injection six-way valve is communicated with a third valve port of the two-position sample injection six-way valve;

when advance kind two six-way valve when the second state, advance kind two six-way valve's first valve port with advance kind two six-way valve's second valve port intercommunication, advance kind two six-way valve's third valve port with advance kind two six-way valve's fourth valve port intercommunication, advance kind two six-way valve's fifth valve port with advance kind two six-way valve's sixth valve port intercommunication.

Further, the drive mechanism includes a syringe pump.

The utility model provides a sample analysis system, including a plurality of chromatographs with the utility model provides a sampling device, it is a plurality of sampling mechanism with a plurality of chromatographs's sampling pipeline connects respectively, in order to be a plurality of respectively advance the appearance in the chromatograph.

The utility model discloses sampling device has realized that actuating mechanism drive sample needle advances the appearance to different sampling mechanism through switching the valves, because a plurality of sampling mechanism are used for being connected respectively with a plurality of analytical equipment's sampling pipeline to can advance the appearance to analytical equipment through the sampling mechanism who is connected with analytical equipment as required. For example, when the sample needs to be fed into the device a, the switching valve set controls the sample feeding mechanism connected with the device a to be connected with the driving mechanism and the sample needle, and at this time, under the action of the driving mechanism, the sample is fed into the sample feeding mechanism connected with the device a, and the sample feeding mechanism connected with the device a can feed the sample into the device a; when the sample is required to be fed to the device B, the switching valve group controls the sample feeding mechanism connected with the device B to be connected with the driving mechanism and the sample needle, at the moment, the sample is fed to the sample feeding mechanism connected with the device B under the action of the driving mechanism, and the sample feeding mechanism connected with the device B can feed the sample to the device B. The utility model discloses a sampling device accessible a set is for many analytical equipment to advance the appearance, compares every analytical equipment and all is equipped with one set of sampling device's form, has reduced user's purchase, use and maintenance cost.

The utility model provides a sample analysis system, including many chromatographs with the utility model provides a sampling device, a plurality of sampling mechanism are connected respectively with the appearance pipeline of a plurality of chromatographs to advance the appearance in to a plurality of chromatographs respectively. The utility model discloses sample analysis system is through utilizing the utility model provides a sampling device has realized the one set of sampling device of many chromatograph sharings, compares every chromatograph and all is equipped with one set of sampling device's form, has reduced user's purchase, use and maintenance cost.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic diagram of a sample introduction device according to an embodiment of the present invention introducing a sample (sample loading of the device a) to a first sample introduction mechanism corresponding to the device a and analyzing a state of the device B;

fig. 2 is a schematic diagram of a sample introduction device provided in an embodiment of the present invention for introducing a sample to a device a and analyzing a state of a device B;

fig. 3 is a schematic diagram of a state of waste liquid disposal and analysis of the device B of the first sample feeding mechanism of the sample feeding device according to the embodiment of the present invention;

fig. 4 is a schematic diagram of a first sample feeding mechanism of the sample feeding device according to the embodiment of the present invention for cleaning preparation and analyzing status of the apparatus B;

fig. 5 is a schematic view of a first sample feeding mechanism of the sample feeding device according to the embodiment of the present invention performing cleaning and analyzing states of the apparatus B;

fig. 6 is a schematic diagram of a sample introduction device according to an embodiment of the present invention introducing a sample (sample loading of the device B) to a second sample introduction mechanism corresponding to the device B and analyzing a state of the device a;

fig. 7 is a schematic view of a sample introduction device provided in an embodiment of the present invention introducing a sample into a device B and analyzing a state of the device a;

fig. 8 is a schematic view of a state of discarding the waste liquid of the second sampling mechanism and analyzing the device a of the sampling device according to the embodiment of the present invention;

fig. 9 is a schematic view of a second sample feeding mechanism of the sample feeding device according to the embodiment of the present invention for cleaning preparation and analyzing status of the apparatus a;

fig. 10 is a schematic view of the second sample feeding mechanism of the sample feeding device according to the embodiment of the present invention performing cleaning and analyzing states of the apparatus a.

Icon: 1-a first pipeline; 2-a second pipeline; 3-a third pipeline; 4-a fourth pipeline; 5-sample introduction pipeline; 6-a sixth pipeline; 7-a seventh pipeline; 8-an eighth conduit; 9-a fifth pipeline; 10-two-position three-way valve; 11-a first two-position six-way valve; 12-a second two-position six-way valve; 13-sample introduction two-position six-way valve; 14-a cleaning agent storage bottle; 15-a first cleaning agent storage bottle; 16-a second cleaning agent storage bottle; 17-a first sample injection mechanism; 18-a second sample injection mechanism; 19-a quantification ring; 20-a drive mechanism; 21-a waste liquid storage member; 22-sample bottle; 23-a sample needle; a-a first valve port; b-a second valve port; c-a third valve port; d-a fourth valve port; e-a fifth valve port; f-sixth port.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1 to 10, the present embodiment provides a sample injection device, including: the device comprises a sample needle 23, a driving mechanism 20, a switching valve group and a plurality of sample introduction mechanisms; the sample feeding mechanisms are used for being respectively connected with sample feeding pipelines 5 of a plurality of analysis devices so as to respectively feed samples into the analysis devices; the driving mechanism 20 and the sample needle 23 are respectively connected with the switching valve group through pipelines, the switching valve group is respectively connected with the plurality of sample feeding mechanisms through pipelines, the switching valve group can control the driving mechanism 20 to be communicated with one of the plurality of sample feeding mechanisms, and simultaneously, the sample feeding mechanism communicated with the driving mechanism 20 is communicated with the sample needle 23, so that the driving mechanism 20 drives the sample needle 23 to feed samples into the sample feeding mechanism communicated with the driving mechanism 20.

The "a plurality of sample injection mechanisms are used to connect with the sample injection pipelines 5 of a plurality of analytical devices respectively so as to inject samples into the plurality of analytical devices respectively" can be understood as that the sample injection mechanisms are arranged in one-to-one correspondence with the analytical devices, and when the analytical device has two or more sample injection pipelines 5 and one analytical device may need to correspond to a plurality of sample injection mechanisms, the analytical device can be understood as a plurality of devices.

The number of the sample introduction mechanisms can be set according to the number of the analysis devices, for example, two analysis devices, two sample introduction mechanisms, three analysis devices and three sample introduction mechanisms can be provided.

In this embodiment, through switching over the valves, it has been realized that actuating mechanism 20 drives sample needle 23 and advances the appearance to the mechanism of advancing of difference, because a plurality of mechanism of advancing are used for being connected respectively with a plurality of analytical equipment's injection pipeline 5 to can advance the appearance to analytical equipment through the mechanism of advancing that is connected with analytical equipment as required. For example, when the sample needs to be fed into the device a, the switching valve set controls the sample feeding mechanism connected with the device a to be connected with the driving mechanism 20 and the sample needle 23, and at this time, under the action of the driving mechanism 20, the sample is fed into the sample feeding mechanism connected with the device a, and the sample feeding mechanism connected with the device a can feed the sample into the device a; when the sample is required to be fed into the device B, the switching valve set controls the sample feeding mechanism connected with the device B to be connected with the driving mechanism 20 and the sample needle 23, at the moment, the sample is fed into the sample feeding mechanism connected with the device B under the action of the driving mechanism 20, and the sample feeding mechanism connected with the device B can feed the sample into the device B. The utility model discloses a sampling device accessible a set is for many analytical equipment to advance the appearance, compares every analytical equipment and all is equipped with one set of sampling device's form, has reduced user's purchase, use and maintenance cost.

In order to control drive mechanism 20 and a plurality of alternative intercommunication of advancing the mechanism respectively to and syringe and a plurality of alternative intercommunication of advancing the mechanism, as the utility model discloses a preferred embodiment, this embodiment sampling device's switching valves includes first switching valves and second switching valves. The first switching valve group is connected with the driving mechanism 20 through a first pipeline 1, the first switching valve group is communicated with the plurality of sample feeding mechanisms through second pipelines 2 respectively, and the first switching valve group can enable the driving mechanism 20 to be communicated with one of the plurality of second pipelines 2; the second switches the valves and is connected through third pipeline 3 with a plurality of sampling mechanisms respectively, and the second switches the valves and communicates through fourth pipeline 4 and sample needle 23, and the second switches the valves and can make fourth pipeline 4 and a plurality of sampling mechanisms one intercommunication to make sample needle 23 and a plurality of sampling mechanisms one intercommunication.

That is, the first switching valve set and the second switching valve set are independently controlled, and when the driving mechanism 20 and the sample needle 23 are required to be communicated with the same sample injection mechanism, the driving mechanism 20 is communicated with the sample injection mechanism by controlling the first switching valve set, and the sample injection mechanism is communicated with the sample needle 23 by controlling the second switching valve set.

It can be understood that the connection between the sample injection mechanism and the driving mechanism 20 and the connection between the sample injection mechanism and the sample needle 23 are controlled by two switching valve sets, so that the connection between the driving mechanism 20 and the sample injection mechanism can be controlled independently, and the connection between the sample injection mechanism and the sample needle 23 can also be controlled independently, so that when one of the sample mechanisms is connected with the sample needle 23, the sample mechanism can be selected to be connected with the driving mechanism 20. When the sample mechanism is connected to the driving mechanism 20, the sample can be introduced into the sample introduction mechanism, and when the sample mechanism is not connected to the driving mechanism 20, the sample mechanism can be operated to discharge waste liquid through the sample needle 23.

Furthermore, the sampling mechanism comprises a sampling control valve group and a quantitative ring 19, the second pipeline 2 is connected between the first switching valve group and the sampling control valve group, and the third pipeline 3 is connected between the sampling control valve group and the second switching valve group. The quantitative ring 19 is connected with a sample injection control valve group, the sample injection control valve group is also used for being connected with analysis equipment through a sample injection pipeline 5, the sample injection control valve group has two states, when the sample injection control valve group is in a second state, the quantitative ring 19 is communicated with the analysis equipment, and the quantitative ring 19 injects a sample into the analysis equipment; when the sample injection control valve group is in the first state, the quantitative ring 19 is connected between the third pipeline 3 and the second pipeline 2, and the driving mechanism 20 can drive the sample needle 23 to inject a sample into the quantitative ring 19.

Specifically, the sample injection control valve group is a sample injection two-position six-way valve 13; six valve ports of the sample introduction two-position six-way valve 13 are a first valve port a, a second valve port b, a third valve port c, a fourth valve port d, a fifth valve port e and a sixth valve port f which are sequentially arranged along a ring shape. The first valve port a and the fourth valve port d of the two-position sample injection six-way valve 13 are respectively connected with two ends of the quantitative ring 19, the second valve port b of the two-position sample injection six-way valve 13 is communicated with the third pipeline 3 corresponding to the sample injection mechanism, the third valve port c of the two-position sample injection six-way valve 13 is communicated with the second pipeline 2 corresponding to the sample injection mechanism, and the fifth valve port e and the sixth valve port f of the two-position sample injection six-way valve 13 are respectively connected with the sample injection pipeline 5 of the analytical equipment.

When the two-position-for-sampling six-way valve 13 is in the first state, the fourth valve port d of the two-position-for-sampling six-way valve 13 is communicated with the fifth valve port e of the two-position-for-sampling six-way valve 13, the first valve port a of the two-position-for-sampling six-way valve 13 is communicated with the sixth valve port f of the two-position-for-sampling six-way valve 13, and the second valve port b of the two-position-for-sampling six-way valve 13 is communicated with the third valve port. When the two-position two-way sampling valve 13 is in the second state, the first valve port a of the two-position two-way sampling valve 13 is communicated with the second valve port b of the two-position two-way sampling valve 13, the third valve port c of the two-position two-way sampling valve 13 is communicated with the fourth valve port d of the two-position two-way sampling valve 13, and the fifth valve port e of the two-position two-way sampling valve 13 is communicated with the sixth valve port f of the two-position two-way sampling valve 13.

In order to clean the sample injection mechanism in time, the sample injection device of the embodiment further comprises a cleaning mechanism, the cleaning mechanism comprises a cleaning agent storage bottle 14 and a waste liquid storage part 21, the cleaning agent storage bottle 14 is communicated with the first switching valve group through a sixth pipeline 6, and the waste liquid storage part 21 is communicated with the second switching valve group through a seventh pipeline 7; one end of the second pipeline 2 close to the first switching valve group is communicated with the cleaning agent storage bottle 14 or the driving mechanism 20 through the first switching valve group; and one end of the seventh pipeline 7 close to the second switching valve group is switched on and off through the switching of the second switching valve group. When the sample injection control valve group is in the second state, the second pipeline 2 of the sample injection mechanism corresponding to the sample injection control valve group is communicated with the driving mechanism 20, the second pipeline 2 of the sample injection mechanism corresponding to the sample injection control valve group is communicated with the third pipeline 3, and the third pipeline 3 of the sample injection mechanism corresponding to the sample injection control valve group can be communicated with the seventh pipeline 7 so as to inject samples into the quantitative ring of the sample injection mechanism corresponding to the sample injection control valve group. When the sample injection control valve group is in a first state, the second pipeline 2 of the sample injection mechanism corresponding to the sample injection control valve group can be communicated with the driving mechanism 20 and the cleaning agent storage bottle 14 in an alternative mode, and the third pipeline 3 of the sample injection mechanism corresponding to the sample injection control valve group can be communicated with the fourth pipeline 4 and the seventh pipeline 7 in an alternative mode.

As a specific form, when the sample injection control valve set is in the first state: the driving mechanism 20 is communicated with the second pipeline 2 of the sample feeding mechanism corresponding to the sample feeding control valve group, and the third pipeline 3 of the sample feeding mechanism corresponding to the sample feeding control valve group is communicated with the fourth pipeline 4, so that the driving mechanism 20 can drive the cleaning agent to clean the third pipeline 3, the fourth pipeline 4 and the sample needle 23. Or the second pipeline 2 of the sample injection mechanism corresponding to the sample injection control valve group is communicated with the cleaning agent storage bottle 14, and the third pipeline 3 of the sample injection mechanism corresponding to the sample injection control valve group is communicated with the seventh pipeline 7, so that the cleaning agent in the cleaning agent storage bottle 14 sequentially flows into the waste liquid storage part 21 through the second pipeline 2, the third pipeline 3 and the seventh pipeline 7.

In practical applications, the cleaning agent storage bottle 14 is placed at a position higher than the height of the waste liquid storage member 21. The second pipeline 2 of the arbitrary sampling mechanism is communicated with a cleaning agent storage bottle 14, the first control valve group controls the third pipeline 3 communicated with the sampling mechanism to be communicated with the second pipeline 2, and when the third pipeline 3 is communicated with the corresponding seventh pipeline 7, the cleaning agent can be automatically discharged into the waste liquid storage part 21 through the second pipeline 2, the third pipeline 3 and the seventh pipeline 7 under the action of pressure formed by height difference, and sample waste liquid disposal is automatically completed. The second pipeline 2 of any sample feeding mechanism is communicated with a cleaning agent storage bottle 14, the first control valve group controls the third pipeline 3 communicated with the sample feeding mechanism to be communicated with the second pipeline 2, and when the third pipeline 3 is not communicated with the seventh pipeline 7 under the action of the first control valve group, the pipeline communicated with the sample feeding mechanism is sealed. The second pipeline 2 of any sample feeding mechanism is communicated with the driving mechanism 20, the first control valve group controls the third pipeline 3 communicated with the sample feeding mechanism to be communicated with the second pipeline 2, and when the third pipeline 3 is communicated with the fourth pipeline 4, the third pipeline 3, the fourth pipeline 4 and the sample needle 23 are driven and cleaned through the driving mechanism 20. The second pipeline 2 of any sample feeding mechanism is communicated with the driving mechanism 20, the first control valve group controls the third pipeline 3 communicated with the sample feeding mechanism to be communicated with the second pipeline 2, and when the third pipeline 3 is communicated with the seventh pipeline 7, the driving mechanism 20 clears the cleaning solution or the sample of the third pipeline 3 into the waste liquid storage part 21. The second pipeline 2 of any sample injection mechanism is communicated with the driving mechanism 20, the first control valve group controls the third pipeline 3 and the second pipeline 2 which are communicated with the sample injection mechanism to be respectively communicated with the quantitative ring 19, and when the third pipeline 3 is communicated with the fourth pipeline 4, sample injection can be carried out to the quantitative ring 19.

In the action process in the upper section, different sampling mechanisms can perform different operations at the same time, for example, when the second pipeline 2 of one sampling mechanism is communicated with the driving mechanism 20, the second pipeline 2 of another sampling mechanism is communicated with the cleaning agent storage bottle 14 to perform different operations.

Further, the sample introduction device further comprises a sample bottle 22; the sample vial 22 may be placed on a tray. The sample needle 23 is movable between the sample bottle 22 or the waste liquid storage 21; when the sampling control valve group of any sampling mechanism is in the second state, the sample needle 23 is positioned in the sample bottle 22 corresponding to the sampling mechanism; when the third pipeline 3, the fourth pipeline 4 and the sample needle 23 of any one sampling mechanism are cleaned under the action of the driving mechanism 20, and the sample needle 23 moves into the waste liquid storage part 21, the sample needle 23 is used for discharging a cleaning agent into the waste liquid storage part 21.

That is, when the sample needs to be injected into the quantitative ring 19 of any sample injection mechanism, the sample needle 23 is located in the sample bottle 22, and after the sample injection is completed in the quantitative ring 19, the sample in the third pipeline 3 generally needs to be flushed out, and at this time, the sample needle 23 can be moved into the waste liquid storage 21.

Further, the sample introduction device of the embodiment further includes a two-position three-way valve 10, and a first valve port a of the two-position three-way valve 10 is communicated with the driving mechanism 20; a second valve port b of the two-position three-way valve 10 is connected with a fifth pipeline 9, and the fifth pipeline 9 is connected with a first switching valve group and is communicated with a cleaning agent storage bottle 14 through the first switching valve group; the third valve port of the two-position three-way valve 10 is communicated with the first pipeline 1.

The two-position three-way valve 10 has two states, when the two-position three-way valve 10 is in the first state, the first valve port a of the two-position three-way valve 10 is communicated with the second valve port b of the two-position three-way valve 10, and the driving mechanism 20 sucks the cleaning agent in the cleaning agent storage bottle 14; when the two-position three-way valve 10 is in the second state, the first port a and the third port c of the two-position three-way valve 10 are communicated, and the driving mechanism 20 leads the sucked cleaning agent into the second pipeline 2 communicated with the first port a and the third port c.

It can be understood that the two-position three-way valve 10 enables the driving mechanism 20 to be selectively communicated with the cleaning agent storage bottle 14 or alternatively communicated with a plurality of sample injection mechanisms, so that the driving mechanism 20 can absorb the cleaning agent from the cleaning agent storage bottle 14 and can also be used as a sample injection and cleaning power source of the sample injection mechanism.

As a specific embodiment of the present invention, the number of the sample feeding mechanisms is two, which are the first sample feeding mechanism 17 and the second sample feeding mechanism 18. The quantity of the cleaning agent storage bottles 14 is two, and the second valve port b of the two-position three-way valve 10 is communicated with one of the two cleaning agent storage bottles 14 through a first switching valve group.

The first switching valve group has two states, when the first switching valve group is in the first state, the second pipeline 2 of the first sample injection mechanism 17 is communicated with the driving mechanism 20, and the second pipeline 2 of the second sample injection mechanism 18 is communicated with the cleaning agent storage bottle 14; when the first switching valve group is in the second state, the second pipeline 2 of the second sample injection mechanism 18 is communicated with the driving mechanism 20, and the second pipeline 2 of the first sample injection mechanism 17 is communicated with the cleaning agent storage bottle 14. The second switching valve group has two states, when the second switching valve group is in the first state, the third pipeline 3 of the first sample injection mechanism 17 is communicated with the sample needle 23, and the third pipeline 3 of the second sample injection mechanism 18 is communicated with the waste liquid storage part 21; when the second switching valve group is in the second state, the third pipeline 3 of the second sample injection mechanism 18 is communicated with the sample needle 23, and the third pipeline 3 of the first sample injection mechanism 17 is communicated with the waste liquid storage part 21.

Specifically, the first switching valve group is a first two-position six-way valve 11, and six valve ports of the first two-position six-way valve 11 are respectively a first valve port a, a second valve port b, a third valve port c, a fourth valve port d, a fifth valve port e and a sixth valve port f which are annularly arranged in sequence. The fifth valve port e of the first two-position six-way valve 11 is communicated with the second valve port b of the two-position three-way valve 10, the fourth valve port d of the first two-position six-way valve 11 is communicated with the second cleaning agent storage bottle 16, the sixth valve port f of the first two-position six-way valve 11 is communicated with the first cleaning agent storage bottle 15, the second valve port b of the first two-position six-way valve 11 is communicated with the third valve port c of the two-position three-way valve 10, the first valve port a of the first two-position six-way valve 11 is communicated with the second pipeline 2 of the first sample feeding mechanism 17, and the third valve port c of the first two-position six-way valve 11 is communicated with the second pipeline 2 of the second sample feeding mechanism 18.

When the first two-position six-way valve 11 is in the first state: the fifth port e of the first two-position six-way valve 11 is communicated with the sixth port f of the first two-position six-way valve 11, the second port b of the first two-position six-way valve 11 is communicated with the first port a of the first two-position six-way valve 11, and the fourth port d of the first two-position six-way valve 11 is communicated with the third port c. When the first two-position six-way valve 11 is in the second state: the fifth valve port e of the first two-position six-way valve 11 is communicated with the fourth valve port d of the first two-position six-way valve 11, the second valve port b of the first two-position six-way valve 11 is communicated with the third valve port c of the first two-position six-way valve 11, and the first valve port a of the first two-position six-way valve 11 is communicated with the sixth valve port f.

The second switching valve group is a second two-position six-way valve 12; the six valve ports of the second two-position six-way valve 12 are respectively a first valve port a, a second valve port b, a third valve port c, a fourth valve port d, a fifth valve port e and a sixth valve port f which are annularly arranged in sequence. A first valve port a of the second two-position six-way valve 12 is used for being communicated with a third pipeline 3 of the first sample injection mechanism 17, a second valve port b of the second two-position six-way valve 12 is communicated with a fourth pipeline 4, and a third valve port c of the second two-position six-way valve 12 is used for being communicated with the third pipeline 3 of the second sample injection mechanism 18; the fourth valve port d of the second two-position six-way valve 12 is communicated with the seventh pipeline 7 of the second sample injection mechanism 18, the fifth valve port e of the second two-position six-way valve 12 is a closed valve port, and the sixth valve port f of the second two-position six-way valve 12 is communicated with the seventh pipeline 7 of the first sample injection mechanism 17.

When the second two-position six-way valve 12 is in the first state, the first valve port a of the second two-position six-way valve 12 is communicated with the second valve port b of the second two-position six-way valve 12, the third valve port c of the second two-position six-way valve 12 is communicated with the fourth valve port d of the second two-position six-way valve 12, and the fifth valve port e of the second two-position six-way valve 12 is communicated with the sixth valve port f of the second two-position six-way valve 12. When the second two-position six-way valve 12 is in the second state, the first valve port a of the second two-position six-way valve 12 is communicated with the sixth valve port f of the second two-position six-way valve 12, the second valve port b of the second two-position six-way valve 12 is communicated with the third valve port c of the second two-position six-way valve 12, and the fourth valve port d of the second two-position six-way valve 12 is communicated with the fifth valve port e of the second two-position six-way valve 12.

It can be understood that the two-position three-way valve 10, the first two-position six-way valve 11, the second two-position six-way valve 12, and the sample injection two-position six-way valve 13 in this embodiment can be switched in two states, and can be realized by driving the valve to rotate through a driving device, and the specific driving device can be in a form that a motor drives a screw. The two-position three-way valve 10, the first two-position six-way valve 11, the second two-position six-way valve 12 and the valve ports of the two-position sampling six-way valve 13 are connected, so that the two states of any one valve can be switched only by forward and reverse conversion, and the adjustment is convenient.

The drive mechanism 20 of the present embodiment may be a syringe pump.

In this embodiment, outlets of the seventh pipelines 7 corresponding to the two sampling mechanisms can be collected in the same eighth pipeline 8 and then communicated with the waste liquid storage part 21.

The specific use process of this embodiment sampling device has ten kinds of states:

as shown in fig. 1, a first operating state is: at this time, the sample is injected into the quantitative loop 19 of the first sample injection mechanism 17 corresponding to the device a, at this time, the device B is in an analysis state, at this time, the sample needle 23 is in the sample bottle 22 of the sample corresponding to the device a, and the connection state of each valve group is as follows:

the first two-position six-way valve 11 is in the first state: the fifth port e of the first two-position six-way valve 11 is communicated with the sixth port f of the first two-position six-way valve 11, the second port b of the first two-position six-way valve 11 is communicated with the first port a of the first two-position six-way valve 11, and the fourth port d of the first two-position six-way valve 11 is communicated with the third port c. The second two-position six-way valve 12 is in the first state: the first valve port a of the second two-position six-way valve 12 is communicated with the second valve port b of the second two-position six-way valve 12, the third valve port c of the second two-position six-way valve 12 is communicated with the fourth valve port d of the second two-position six-way valve 12, and the fifth valve port e of the second two-position six-way valve 12 is communicated with the sixth valve port f of the second two-position six-way valve 12. The two-position six-way valve 13 for sample injection of the first sample injection mechanism 17 is in the second state: the first valve port a of the two-sample-position six-way valve 13 is communicated with the second valve port b of the two-sample-position six-way valve 13, the third valve port c of the two-sample-position six-way valve 13 is communicated with the fourth valve port d of the two-sample-position six-way valve 13, and the fifth valve port e of the two-sample-position six-way valve 13 is communicated with the sixth valve port f of the two-sample-position six-way valve 13. The two-position three-way valve 10 is in the second state: the first port a of the two-position three-way valve 10 is communicated with the third port c of the two-position three-way valve 10. The two-position and six-way sample injection valve 13 of the second sample injection mechanism 18 is in the first state: the fourth valve port d of the two-sample-position six-way valve 13 is communicated with the fifth valve port e of the two-sample-position six-way valve 13, the first valve port a of the two-sample-position six-way valve 13 is communicated with the sixth valve port f of the two-sample-position six-way valve 13, and the second valve port b of the two-sample-position six-way valve 13 is communicated with the third valve port c of the two-sample-position six-way valve 13.

At this time, the driving mechanism 20, the first pipeline 1, the second pipeline 2 of the first sample injection mechanism 17, the quantitative ring 19 of the first sample injection mechanism 17, the third pipeline 3 of the first sample injection mechanism 17, the fourth pipeline 4 and the sample needle 23 are sequentially communicated, and the driving mechanism 20 (syringe pump) is stretched outwards to drive the sample to enter the quantitative ring 19. The second cleaning agent storage bottle 16 corresponding to the second sample introduction mechanism 18 can be communicated with the second pipeline 2 of the second sample introduction mechanism 18 through the corresponding sixth pipeline 6, and the second pipeline 2 of the second sample introduction mechanism 18 and the third pipeline 3 of the second sample introduction mechanism 18 are sequentially communicated with the corresponding seventh pipeline 7, so that the cleaning agent of the second cleaning agent storage bottle 16 corresponding to the second sample introduction mechanism 18 can flow into the second pipeline 2 and the third pipeline 3 of the second sample introduction mechanism 18 to automatically clean the pipelines. The quantitative ring 19 of the second sample injection mechanism 18 is communicated with the sample injection pipeline 5 of the device B, and the device B is in a sample analysis state.

Fig. 2 shows a second operating state: schematic diagram of the sample introduction process of the apparatus a and the analysis process of the apparatus B, which can be regarded as the next process in fig. 1, the sample needle 23 is still in the sample bottle 22, and the connection state of each valve set is different from the first working state only in that:

the two-position six-way valve 13 for sample injection of the first sample injection mechanism 17 is switched from the second state to the first state: the fourth valve port d of the two-sample-position six-way valve 13 is communicated with the fifth valve port e of the two-sample-position six-way valve 13, the first valve port a of the two-sample-position six-way valve 13 is communicated with the sixth valve port f of the two-sample-position six-way valve 13, and the second valve port b of the two-sample-position six-way valve 13 is communicated with the third valve port c of the two-sample-position six-way valve 13.

At this time, the difference from the first state is only that the first sample injection mechanism 17 is changed in operation, specifically, the driving mechanism 20, the first pipeline 1, the second pipeline 2 of the first sample injection mechanism 17, the third pipeline 3, the fourth pipeline 4 and the sample needle 23 are sequentially communicated, the driving mechanism 20 does not operate, the quantitative loop 19 of the first sample injection mechanism 17 is communicated with the sample injection pipeline 5 of the apparatus a, and samples are injected into the apparatus a under the action of the driving pump of the sample injection pipeline 5 of the apparatus a.

Fig. 3 shows a third operating state: the waste sample liquid in the first sample injection mechanism 17 is discarded, and the apparatus B is still in an analysis state, which can be understood as a next working state of the second working state, the sample needle 23 is removed from the sample bottle 22, and the connection state of each valve set is different from the second working state only in that:

the first two-position six-way valve 11 is in the second state: the fifth valve port e of the first two-position six-way valve 11 is communicated with the fourth valve port d of the first two-position six-way valve 11, the second valve port b of the first two-position six-way valve 11 is communicated with the third valve port c of the first two-position six-way valve 11, and the fourth valve port d of the first two-position six-way valve 11 is communicated with the fifth valve port e.

At this time, the difference from the second operation state is that the driving mechanism 20 is communicated with the second pipeline 2 of the second sample injection mechanism 18, the third pipeline 3 of the second sample injection mechanism 18, and the seventh pipeline 7 of the second sample injection mechanism 18 are sequentially communicated, and the driving mechanism 20 (injector) pushes the cleaning agent and the like in the second pipeline 2 and the third pipeline 3 of the second sample injection mechanism 18 to be discharged into the waste liquid storage part 21 through the eighth pipeline 8. The first cleaning agent storage bottle 15 corresponding to the first sample introduction mechanism 17 is communicated with the second pipeline 2 of the first sample introduction mechanism 17 through the corresponding sixth pipeline 6, and the second pipeline 2 of the first sample introduction mechanism 17, the third pipeline 3 of the first sample introduction mechanism 17, the fourth pipeline 4 and the sample needle 23 are communicated, so that the cleaning agent of the first cleaning agent storage bottle 15 corresponding to the first sample introduction mechanism 17 can flow into the second pipeline 2, the third pipeline 3, the fourth pipeline 4 and the sample needle 23 of the first sample introduction mechanism 17, and the sample waste liquid of the third pipeline 3 of the first sample introduction mechanism 17 is discharged through the sample needle 23.

Fig. 4 shows a fourth operating state: first sampling mechanism 17 washs the preparation work, and equipment B still is in the analysis state, and it is the next operating condition of third operating condition, and in sample needle 23 moved waste liquid storage 21, the connection status of each valves and the difference of third operating condition only lie in:

the first two-position six-way valve 11 is in the first state: the fifth port e of the first two-position six-way valve 11 is communicated with the sixth port f of the first two-position six-way valve 11, the second port b of the first two-position six-way valve 11 is communicated with the first port a of the first two-position six-way valve 11, and the fourth port d of the first two-position six-way valve 11 is communicated with the third port c. The two-position three-way valve 10 is in a first state, and a first valve port a of the two-position three-way valve 10 is communicated with a second valve port b of the two-position three-way valve 10; when the two-position three-way valve 10 is in the first state, the first valve port a of the two-position three-way valve 10 is communicated with the second valve port b.

At this time, the driving mechanism 20 pulls out and absorbs the detergent of the first detergent storage bottle 15 through the fifth line 9. The second pipeline 2 and the third pipeline 3 of the second sample injection mechanism 18 are consistent with the second working state.

As shown in fig. 5, the fifth working state is that the first sampling mechanism 17 is channel-cleaned, and the apparatus B is still in the analyzing state, which can be understood as the next step of the fourth working state, and the sample needle 23 is still in the waste liquid storage 21, and the connection state of each valve set is different from the fourth working state only in that:

the two-position three-way valve 10 is switched to the first state, and the first valve port a of the two-position three-way valve 10 is communicated with the third valve port c. At this time, the driving mechanism 20 discharges the cleaning agent sucked in the previous working state into the waste liquid storage 21 through the second pipeline 2, the third pipeline 3, the fourth pipeline 4 and the sample needle 23 of the first sampling mechanism 17.

The sixth working state to the tenth working state are the case of the device a analysis, the second sample injection mechanism 18 executes different working states, the connection states of the valve groups are shown in fig. 6 to 10, respectively, and the description of the process of executing different working states and device B analysis on the first sample injection mechanism 17 can be obviously found by referring to fig. 6 to 10, which is not described herein again.

The utility model also provides a sample analysis system, including the sampling device that many chromatographs and this embodiment provided, a plurality of sampling mechanisms are connected respectively with the appearance pipeline 5 of a plurality of chromatographs to advance the appearance in to a plurality of chromatographs respectively.

For example, as shown in fig. 1 to 10, the number of the sample injection mechanisms is two, and the number of the analysis devices is two, which are respectively a device a and a device B, wherein the device a is connected to the first sample injection mechanism 17, and the device B is connected to the second sample injection mechanism 18.

The sample analysis system of the embodiment realizes that a plurality of chromatographs share one set of sample injection device by utilizing the sample injection device provided by the embodiment, and reduces the purchase, use and maintenance cost of users compared with the mode that each chromatograph is provided with one set of sample injection device.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. A sample introduction device, comprising: the sampling device comprises a sample needle, a driving mechanism, a switching valve group and a plurality of sampling mechanisms;

2. The sample injection apparatus of claim 1, wherein the switch valve set comprises a first switch valve set and a second switch valve set;

3. The sample injection device according to claim 2, wherein the sample injection mechanism comprises a sample injection control valve set and a dosing ring, the second pipeline is connected between the first switching valve set and the sample injection control valve set, and the third pipeline is connected between the sample injection control valve set and the second switching valve set;

4. The sample injection device according to claim 3, further comprising a cleaning mechanism, wherein the cleaning mechanism comprises a cleaning agent storage bottle and a waste liquid storage part, the cleaning agent storage bottle is communicated with the first switching valve set through a sixth pipeline, and the waste liquid storage part is communicated with the second switching valve set through a seventh pipeline;

5. The sample introduction device according to claim 4, wherein the sample introduction control valve set is in a first state:

6. The sample introduction device according to claim 5, further comprising a sample vial; the sample needle is movable between a sample vial or the waste reservoir; when the sample injection control valve group of any sample injection mechanism is in a second state, the sample needle is positioned in the sample bottle corresponding to the sample injection mechanism;

7. The sample introduction device according to any one of claims 4 to 6, further comprising a two-position three-way valve, wherein a first valve port of the two-position three-way valve is communicated with the driving mechanism; a second valve port of the two-position three-way valve is connected with a fifth pipeline, and the fifth pipeline is connected with the first switching valve group and is communicated with the cleaning agent storage bottle through the first switching valve group; a third valve port of the two-position three-way valve is communicated with a first pipeline;

8. The sample introduction device according to claim 7, wherein the number of the sample introduction mechanisms is two, and the two sample introduction mechanisms are respectively a first sample introduction mechanism and a second sample introduction mechanism, the number of the cleaning agent storage bottles is two, the two cleaning agent storage bottles are respectively used for containing the cleaning agents of the two sample introduction mechanisms, the cleaning agent storage bottle used for containing the cleaning agent of the first sample introduction mechanism is a first cleaning agent storage bottle, and the cleaning agent storage bottle used for containing the cleaning agent of the second sample introduction mechanism is a second cleaning agent storage bottle;

the first switching valve group has two states, when the first switching valve group is in the first state, a second pipeline of the first sample injection mechanism is communicated with the driving mechanism, and a second pipeline of the second sample injection mechanism is communicated with the cleaning agent storage bottle; when the first switching valve group is in a second state, a second pipeline of the second sample feeding mechanism is communicated with the driving mechanism, and a second pipeline of the first sample feeding mechanism is communicated with the cleaning agent storage bottle;

the second switching valve group has two states, when the second switching valve group is in the first state, a third pipeline of the first sample feeding mechanism is communicated with the sample needle, and a third pipeline of the second sample feeding mechanism is communicated with the waste liquid storage part;

9. The sample injection device according to claim 8, wherein the first switching valve set is a first two-position six-way valve, and six valve ports of the first two-position six-way valve are respectively a first valve port, a second valve port, a third valve port, a fourth valve port, a fifth valve port and a sixth valve port which are annularly arranged in sequence;

when the first two-position six-way valve is in the second state: the fifth valve port of the first two-position six-way valve is communicated with the fourth valve port of the first two-position six-way valve, the second valve port of the first two-position six-way valve is communicated with the third valve port of the first two-position six-way valve, and the first valve port of the first two-position six-way valve is communicated with the sixth valve port;

the second switching valve group is a second two-position six-way valve, and six valve ports of the second two-position six-way valve are respectively a first valve port, a second valve port, a third valve port, a fourth valve port, a fifth valve port and a sixth valve port which are sequentially arranged in an annular manner;

when the second two-position six-way valve is in the first state: the first valve port of the second two-position six-way valve is communicated with the second valve port of the second two-position six-way valve, the third valve port of the second two-position six-way valve is communicated with the fourth valve port of the second two-position six-way valve, and the fifth valve port of the second two-position six-way valve is communicated with the sixth valve port of the second two-position six-way valve;

when the second two-position six-way valve is in the second state: the first valve port of the second two-position six-way valve is communicated with the sixth valve port of the second two-position six-way valve, the second valve port of the second two-position six-way valve is communicated with the third valve port of the second two-position six-way valve, and the fourth valve port of the second two-position six-way valve is communicated with the fifth valve port of the second two-position six-way valve;

the sample injection control valve group is a sample injection two-position six-way valve, and six valve ports of the sample injection two-position six-way valve are a first valve port, a second valve port, a third valve port, a fourth valve port, a fifth valve port and a sixth valve port which are sequentially arranged along a ring shape;

the two-position sample injection six-way valve is in a first state: the fourth valve port of the two-position sample injection six-way valve is communicated with the fifth valve port of the two-position sample injection six-way valve, the first valve port of the two-position sample injection six-way valve is communicated with the sixth valve port of the two-position sample injection six-way valve, and the second valve port of the two-position sample injection six-way valve is communicated with the third valve port of the two-position sample injection six-way valve;

and the sample introduction two-position six-way valve is in a second state: the first valve port of the two-position sample injection six-way valve is communicated with the second valve port of the two-position sample injection six-way valve, the third valve port of the two-position sample injection six-way valve is communicated with the fourth valve port of the two-position sample injection six-way valve, and the fifth valve port of the two-position sample injection six-way valve is communicated with the sixth valve port of the two-position sample injection six-way valve.

10. A sample analysis system, comprising a plurality of chromatographs and the sample injection device according to any one of claims 1 to 9, wherein the plurality of sample injection mechanisms are respectively connected to sample injection pipelines of the plurality of chromatographs to inject samples into the plurality of chromatographs, respectively.