CN218440795U - Liquid chromatography analyzer and sample injection valve thereof - Google Patents

Abstract

The utility model relates to a liquid chromatography appearance and sampling valve thereof, this sampling valve includes the stator and can be for the rotor of stator rotation, the first terminal surface of rotor and the first terminal surface sealing contact of stator, be formed with first inlet hole on the first terminal surface of stator, the second inlet hole, the third inlet hole, first waste liquid hole, the second waste liquid hole, the outlet hole, first connecting hole, second connecting hole and stator groove, first inlet hole is located the center department of stator, first connecting hole, the second connecting hole, the outlet hole, first waste liquid hole and second waste liquid hole are located on the first circumference that uses the center of stator as the centre of a circle, second inlet hole and third inlet hole are located on the second circumference that uses the center of stator as the centre of a circle, the radius of second circumference is greater than the radius of first circumference, be formed with mutually independent first guiding gutter, the second guiding gutter, the third guiding gutter, the fourth guiding gutter, the fifth guiding gutter, sixth guiding gutter and seventh guiding gutter on the first terminal surface of rotor.

Description

Liquid chromatographic analyzer and sample injection valve thereof

Technical Field

The utility model relates to a chromatographic analyzer sampling valve technical field specifically relates to a liquid chromatographic analyzer and sampling valve thereof.

Background

The liquid chromatographic analyzer is an instrument which firstly separates a mixture and then analyzes and identifies the mixture by utilizing the difference of the distribution ratio of the mixture between liquid-solid or immiscible two liquids. When analyzing or preparing a sample by a liquid chromatography analyzer, it is necessary to design a flow path so as to realize functions such as sampling, sample injection, system flow path flushing, and the like. In the related art, a rotatable sample injection valve is usually adopted as a structure for realizing the above functions of the flow path, but the ports on the sample injection valve are unreasonable in arrangement, which is easy to cause difficulty for pipeline arrangement, and meanwhile, mutual permeation between the ports is easy to occur.

SUMMERY OF THE UTILITY MODEL

The purpose of this disclosure is to provide a liquid chromatographic analyzer and sampling valve thereof to solve the technical problem that exists among the correlation technique.

In order to achieve the above object, according to one aspect of the present disclosure, the present disclosure provides a sample injection valve of a liquid chromatograph analyzer, including a stator and a rotor, wherein the rotor is capable of rotating relative to the stator, and a first end face of the rotor is in sealing contact with a first end face of the stator;

a first inlet hole, a second inlet hole, a third inlet hole, a first waste liquid hole, a second waste liquid hole, an outlet hole, a first connecting hole, a second connecting hole and a stator groove are formed on the first end surface of the stator;

the first inlet hole is used for communicating with a system pump of a liquid chromatographic analyzer, the second inlet hole is used for communicating with a manual injector, the third inlet hole is used for communicating with a sample pump of the liquid chromatographic analyzer, the outlet hole is used for communicating with a chromatographic column of the liquid chromatographic analyzer, the first connecting hole is used for communicating with an inlet of a quantitative ring, and the second connecting hole is used for communicating with an outlet of the quantitative ring;

the first inlet hole is located at the center of the stator, the first connection hole, the second connection hole, the outlet hole, the first waste liquid hole and the second waste liquid hole are located on a first circumference with the center of the stator as a center, the second inlet hole and the third inlet hole are located on a second circumference with the center of the stator as a center, and the radius of the second circumference is larger than that of the first circumference;

a first diversion trench, a second diversion trench, a third diversion trench, a fourth diversion trench, a fifth diversion trench, a sixth diversion trench and a seventh diversion trench which are mutually independent are formed on the first end surface of the rotor;

wherein the rotor has a first rotational position, a second rotational position, and a third rotational position;

in the first rotational position, the first guide groove communicates the first inlet hole with the outlet hole, the second guide groove communicates the second inlet hole with the first connection hole, and the third guide groove communicates the second connection hole with the second waste liquid hole;

in the second rotation position, the first guiding groove communicates the first inlet hole with the stator groove, the fourth guiding groove communicates the stator groove with the outlet hole, the fifth guiding groove communicates the third inlet hole with the first connection hole, and the sixth guiding groove communicates the second connection hole with the first waste liquid hole;

in the third rotation position, the first guide groove communicates the first inlet hole with the first connection hole, the third guide groove communicates the second connection hole with the outlet hole, and the seventh guide groove communicates the third inlet hole with the second waste liquid hole.

Optionally, an eighth guiding groove is further formed on the first end surface of the rotor, the rotor further has a fourth rotation position, in the fourth rotation position, the eighth guiding groove communicates the third inlet hole with the outlet hole, and the first guiding groove communicates the first inlet hole with the first waste liquid hole.

Optionally, a projection of one end of the first guide groove on the stator is located at the center of the stator, and a projection of the other end of the first guide groove on the stator is located on the first circumference;

projections of one end of the second diversion trench, one end of the fifth diversion trench, one end of the seventh diversion trench and one end of the eighth diversion trench on the stator are all located on the first circumference, and projections of the other end of the second diversion trench, the other end of the fifth diversion trench, the other end of the seventh diversion trench and the other end of the eighth diversion trench on the stator are all located on the second circumference;

the projection of the third diversion trench on the stator is positioned on the first circumference and extends along the circumferential direction of the first circumference, and the projection of the sixth diversion trench on the stator is positioned on the first circumference and extends along the circumferential direction of the first circumference;

the projection of one end of the fourth diversion trench on the stator is positioned on the first circumference;

one end of the stator slot is located on the first circumference.

Optionally, the second connection port is located between the outlet hole and the first waste liquid hole, a central angle of the outlet hole corresponding to the second connection hole is equal to a central angle of the third diversion trench corresponding to two ends of the third diversion trench, and a central angle of the third diversion trench corresponding to two ends of the third diversion trench is equal to a central angle of the second connection hole corresponding to the first waste liquid hole.

Alternatively, the first waste liquid hole is formed as an elongated hole extending in the circumferential direction of the first circumference.

Optionally, the difference between the radius of the second circle and the radius of the first circle is greater than or equal to 2.

Optionally, a first inlet interface, a second inlet interface, a third inlet interface, a first waste liquid interface, a second waste liquid interface, an outlet interface, a first connection interface, and a second connection interface are further formed on the stator;

the first inlet interface is used for connecting the system pump and is communicated with the first inlet hole, the second inlet interface is used for connecting the manual injector and is communicated with the second inlet hole, the third inlet interface is used for connecting the sample pump and is communicated with the third inlet hole, the first waste liquid interface is communicated with the first waste liquid hole, the second waste liquid interface is communicated with the second waste liquid hole, the outlet interface is used for connecting the chromatographic column and is communicated with the outlet hole, the first connecting interface is used for connecting the inlet of the quantitative ring and is communicated with the first connecting hole, and the second connecting interface is used for connecting the outlet of the quantitative ring and is communicated with the second connecting hole;

one part of the first inlet interface, the second inlet interface, the third inlet interface, the first waste liquid interface, the second waste liquid interface, the outlet interface, the first connecting interface and the second connecting interface is positioned on the second end face of the stator, and the other part of the first inlet interface, the second inlet interface, the third waste liquid interface, the first waste liquid interface, the second waste liquid interface, the outlet interface, the first connecting interface and the second connecting interface is positioned on the outer peripheral face of the stator.

Optionally, the outer circumferential surface of the stator includes a cylindrical outer circumferential surface and a tapered outer circumferential surface, the tapered outer circumferential surface being located between the cylindrical outer circumferential surface and the second end surface of the stator, and the diameter of the tapered outer circumferential surface gradually decreases in a direction from the cylindrical outer circumferential surface to the second end surface;

the first inlet port, the first waste liquid port, the second waste liquid port and the outlet port are all positioned on the cylindrical peripheral surface;

the first connecting interface, the second connecting interface and the third inlet interface are all positioned on the conical peripheral surface;

the second inlet port is located on a second end face of the stator.

Optionally, the first inlet port, the first waste liquid port, the second waste liquid port, and the outlet port are mutually staggered with the first connection port, the second connection port, and the third inlet port in the axial direction of the stator.

As another aspect of the present disclosure, the present disclosure also provides a liquid chromatography analyzer, which includes a system pump, a sample pump, a manual injector, a chromatography column, a quantitative loop, and the above injection valve.

Through the technical scheme, the first end face of the stator is in sealing contact with the first end face of the rotor, the first end face of the stator is provided with the first inlet hole, the second inlet hole, the third inlet hole, the first waste liquid hole, the second waste liquid hole, the outlet hole, the first connecting hole and the second connecting hole, and the first guide groove, the second guide groove, the third guide groove, the fourth guide groove, the fifth guide groove, the sixth guide groove and the seventh guide groove are formed in the first end face of the rotor.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

fig. 1 is a schematic perspective view of a stator of a sample injection valve according to an embodiment of the present disclosure;

fig. 2 is a schematic perspective view (different from the view of fig. 1) of a stator of a sample injection valve provided in an embodiment of the present disclosure;

FIG. 3 is a schematic perspective view of a rotor of a sample injection valve provided in an embodiment of the present disclosure;

FIG. 4 is a schematic plan view of an arrangement of a first inlet hole, a second inlet hole, a third inlet hole, a first waste liquid hole, a second waste liquid hole, an outlet hole, a first connection hole, a second connection hole, and stator slots on a stator of a sample injection valve provided in an embodiment of the present disclosure, wherein a first circumference and a second circumference are also shown;

fig. 5 is a schematic plan view illustrating the arrangement of the first diversion trench, the second diversion trench, the third diversion trench, the fourth diversion trench, the fifth diversion trench, the sixth diversion trench and the seventh diversion trench on the rotor of the sample injection valve according to an embodiment of the present disclosure, wherein a first circumference and a second circumference are also illustrated;

FIG. 6 is a schematic diagram of a stator and rotor cooperating in a first rotational position of a sample injection valve provided by an embodiment of the present disclosure;

FIG. 7 is a schematic diagram of a stator and rotor cooperating in a second rotational position of a sample injection valve provided in an embodiment of the present disclosure;

FIG. 8 is a schematic diagram illustrating a stator and rotor cooperating with a sample injection valve in a third rotational position according to an embodiment of the present disclosure;

FIG. 9 is a schematic diagram of a stator and a rotor cooperating in a fourth rotational position of a sample injection valve according to an embodiment of the present disclosure;

FIG. 10 is a schematic top view of a stator of a sample injection valve provided in accordance with an embodiment of the present disclosure;

FIG. 11 is a schematic cross-sectional view taken along line B-B of FIG. 10;

FIG. 12 is a schematic cross-sectional view taken along the line C-C of FIG. 10;

FIG. 13 is a schematic cross-sectional view taken along the direction D-D of FIG. 10;

FIG. 14 is a schematic side view of a stator of a sample injection valve provided in accordance with an embodiment of the present disclosure;

FIG. 15 isbase:Sub>A schematic sectional view taken along the line A-A in FIG. 14;

fig. 16 is a schematic perspective view (different from the view of fig. 3) of a rotor of a sample injection valve provided in an embodiment of the present disclosure.

Description of the reference numerals

101-quantitative ring; 1-a stator; 10-a first end face of the stator; 11-a first inlet aperture; 12-a second inlet aperture; 13-a third inlet aperture; 14-first waste well; 15-second waste well; 16-an outlet orifice; 17-a first connection hole; 18-a second connection hole; 19-stator slots; 190-a second end face of the stator; 191-a first circumference; 192-a second circumference; 193-tapered outer peripheral surface; 194-a cylindrical outer peripheral surface; 111-a first portal interface; 121-a second inlet interface; 131-a third portal interface; 141-a first waste liquid interface; 151-second waste liquid interface; 161-an egress interface; 171-a first connection interface; 181-second connection interface; 2-a rotor; 20-a first end face of the rotor; 21-a first guiding gutter; 22-a second guiding gutter; 23-a third diversion trench; 24-a fourth guiding gutter; 25-a fifth guiding gutter; 26-a sixth diversion trench; 27-a seventh guiding gutter; 28-an eighth guiding gutter; 29-straight groove; 31-a first internal flow passage; 32-a second internal flow passage; 33-a third internal flow passage; 34-a fourth internal flow passage; 35-a fifth internal flow passage; 36-a sixth internal flow passage; 37-a seventh internal flow passage; 38-eighth internal flow passage.

Detailed Description

The following detailed description of the embodiments of the disclosure refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

In the present disclosure, the use of directional words such as "inner and outer" means inner and outer of the profile of the corresponding component, unless otherwise stated. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

According to one aspect of the present disclosure, as shown in fig. 1 to 16, the present disclosure provides a sample injection valve of a liquid chromatography analyzer, comprising a stator 1 and a rotor 2, wherein the rotor 2 can rotate relative to the stator 1, and a first end face 20 of the rotor is in sealing contact with a first end face 10 of the stator.

As shown in fig. 4, a first inlet hole 11, a second inlet hole 12, a third inlet hole 13, a first waste liquid hole 14, a second waste liquid hole 15, an outlet hole 16, a first connection hole 17, a second connection hole 18, and a stator slot 19 are formed on a first end surface 10 of the stator. The first inlet hole 11 is used for communicating with a system pump of a liquid chromatograph, the second inlet hole 12 is used for communicating with a manual injector, the third inlet hole 13 is used for communicating with a sample pump of the liquid chromatograph, the outlet hole 16 is used for communicating with a chromatographic column of the liquid chromatograph, the first connecting hole 17 is used for communicating with an inlet of the quantitative ring 101, and the second connecting hole 18 is used for communicating with an outlet of the quantitative ring 101. The first inlet hole 11 is located at the center of the stator 1, the first connection hole 17, the second connection hole 18, the outlet hole 16, the first waste liquid hole 14, and the second waste liquid hole 15 are located on a first circumference 191 centering on the center of the stator 1, the second inlet hole 12 and the third inlet hole 13 are located on a second circumference 192 centering on the center of the stator 1, and the radius of the second circumference 192 is greater than that of the first circumference 191.

As shown in fig. 5, the first end surface 20 of the rotor is formed with a first guide groove 21, a second guide groove 22, a third guide groove 23, a fourth guide groove 24, a fifth guide groove 25, a sixth guide groove 26 and a seventh guide groove 27 which are independent of each other, and the rotor 2 has a first rotational position, a second rotational position and a third rotational position.

As shown in fig. 6, in the first rotation position, the first guide groove 21 communicates the first inlet hole 11 with the outlet hole 16, the second guide groove 22 communicates the second inlet hole 12 with the first connection hole 17, and the third guide groove 23 communicates the second connection hole 18 with the first waste liquid hole 14.

As shown in fig. 7, in the second rotation position, the first guide groove 21 communicates the first inlet hole 11 with the stator groove 19, the fourth guide groove 24 communicates the stator groove 19 with the outlet hole 16, the fifth guide groove 25 communicates the third inlet hole 13 with the first connection hole 17, and the sixth guide groove 26 communicates the second connection hole 18 with the first waste liquid hole 14.

As shown in fig. 8, in the third rotation position, the first guide groove 21 communicates the first inlet hole 11 with the first connection hole 17, the third guide groove 23 communicates the second connection hole 18 with the outlet hole 16, and the seventh guide groove 27 communicates the third inlet hole 13 with the second waste liquid hole 15.

Through the above technical solution, because the first end surface 10 of the stator is in sealing contact with the first end surface 20 of the rotor, and the first end surface 10 of the stator is formed with the first inlet hole 11, the second inlet hole 12, the third inlet hole 13, the first waste liquid hole 14, the second waste liquid hole 15, the outlet hole 16, the first connection hole 17, and the second connection hole 18, and the first guide groove 21, the second guide groove 22, the third guide groove 23, the fourth guide groove 24, the fifth guide groove 25, the sixth guide groove 26, and the seventh guide groove 27 on the first end surface 20 of the rotor, when the rotor 2 rotates relative to the stator 1, the positions of the above guide grooves are also changed, and the guide grooves can conduct different holes on the stator 1 at different positions along with the rotation of the rotor 2.

For example, as shown in fig. 6, in the first rotation position of the rotor 2, the first guiding groove 21 communicates the first inlet hole 11 with the outlet hole 16, the first inlet hole 11 communicates with the system pump of the liquid chromatograph, and the outlet hole 16 communicates with the chromatographic column of the liquid chromatograph, so that the outlet of the system pump of the liquid chromatograph communicates with the chromatographic column through the sample injection valve, and the function of flushing the chromatographic column by the system pump is realized.

Meanwhile, the second guide groove 22 communicates the second inlet hole 12 with the first connection hole 17, and the third guide groove 23 communicates the second connection hole 18 with the first waste liquid hole 14. The second inlet hole 12 communicates with a manual injector, the first connection hole 17 communicates with an inlet of the quantitative ring 101, and the sample is injected into the quantitative ring 101 through the manual injector through the second guide groove 22 into the first connection hole 17, thereby completing the manual injection of the quantitative ring 101. The second connecting hole 18 is communicated with the outlet of the quantitative ring 101, the third flow guide groove 23 is communicated with the second connecting hole 18 and the first waste liquid hole 14, and a sample injected into the quantitative ring 101 through a manual injector is discharged from the outlet of the quantitative ring 101 and enters the first waste liquid hole 14, so that the quantitative ring 101 is fully filled with the sample, the sample is ensured to be sufficient in dosage, and the sample is manually loaded on the quantitative ring 101.

In the second rotational position, as shown in fig. 7, the first guiding groove 21 communicates the first inlet opening 11 with the stator groove 19, the fourth guiding groove 24 communicates the stator groove 19 with the outlet opening 16, and the first inlet opening 11 communicates with the system pump of the liquid chromatograph, so that the liquid flowing out from the system pump flows to the outlet opening 16 through the first guiding groove 21, the stator groove 19 and the fourth guiding groove 24, thereby realizing the function of flushing the chromatographic column by the system pump.

Meanwhile, the fifth diversion trench 25 communicates the third inlet hole 13 with the first connection hole 17, the third inlet hole 13 communicates with a sample pump of the liquid chromatograph, a sample pumped in the sample pump directly enters the quantitative ring 101 through the first connection hole 17 via the fifth diversion trench 25, so that the sample is injected into the quantitative ring 101 through the sample pump, the sixth diversion trench 26 communicates the second connection hole 18 with the first waste liquid hole 14, the second connection hole 18 communicates with an outlet of the quantitative ring 101, the sample flowing out of the quantitative ring 101 directly enters the first waste liquid hole 14, so that the sample in the quantitative ring 101 is ensured to be filled, and the sample is loaded onto the quantitative ring 101 through the sample pump.

In the third rotation position, as shown in fig. 8, the first guide groove 21 communicates the first inlet hole 11 with the first connection hole 17, the first inlet hole 11 communicates with the system pump of the liquid chromatograph, the first connection hole 17 communicates with the inlet of the dosing ring 101, so that the system pump communicates with the inlet of the dosing ring 101, the third guide groove 23 communicates the second connection hole 18 with the outlet hole 16, the second connection hole 18 communicates with the outlet of the dosing ring 101, and the outlet hole 16 communicates with the chromatography column. In this way, the sample injected in advance in the quantitative loop 101 (the sample injected into the quantitative loop 101 by the manual injector or the sample pump) can be injected into the chromatographic column by the power of the system pump to separate the components of the analysis sample.

Meanwhile, the seventh diversion trench 27 communicates the third inlet hole 13 with the second waste liquid hole 15, the third inlet hole 13 communicates with the sample pump of the liquid chromatography, and when the system pump of the liquid chromatography is turned on, the sample pump starts to operate at the same time, so that the liquid in the sample pump flows to the second waste liquid hole 15, thereby preventing the flow path from being blocked.

Through above-mentioned technical scheme, the injection valve can realize that different flow paths are switched on through the rotation of rotor 2 to realize functions such as washing, automatic ration notes appearance and manual ration notes appearance to the chromatographic column. In addition, since the first inlet hole 11 is located at the center of the stator 1, the first connecting hole 17, the second connecting hole 18, the first waste liquid hole 14 and the second waste liquid hole 15 are located on the first circumference 191 centering on the center of the stator 1, the second inlet hole 12 and the third inlet hole 13 are located on the second circumference 192 centering on the center of the stator 1, and the radius of the second circumference 192 is larger than that of the first circumference 191, the holes are arranged in such a way that the distance between the holes is increased, so that when the holes work, liquid in the flow path is not easy to leak due to the small hole distance, and the interference between the holes is reduced. Simultaneously, because the injection valve integrated level in this disclosure is high, need connect more pipelines or equipment, and each arranging of hole is reasonable for the connection of pipeline or equipment injection valve is more convenient, is difficult for appearing interfering the scheduling problem.

Optionally, to further improve the functionality of the sample injection valve provided in the present disclosure, as shown in fig. 5 and 9, the first end surface 20 of the rotor is further formed with an eighth guiding groove 28, the rotor 2 further has a fourth rotation position, in the fourth rotation position, the eighth guiding groove 28 communicates the third inlet hole 13 with the outlet hole 16, and the first guiding groove 21 communicates the first inlet hole 11 with the first waste liquid hole 14.

Because the third inlet hole 13 is communicated with the sample pump of the liquid chromatograph, and the outlet hole 16 is communicated with the chromatographic column, in the fourth rotation position, the eighth diversion trench 28 directly communicates the sample pump of the liquid chromatograph with the chromatographic column, and the sample is directly injected into the chromatographic column through the sample pump, so that the injection of a large amount of sample can be satisfied, the condition of large sample detection amount can be dealt with, and the efficiency of analysis and detection can be improved. When the sample pump is started, the system pump of the liquid chromatograph is also simultaneously started, and the first guide groove 21 communicates the first inlet hole 11 and the first waste liquid hole 14, so that the liquid flowing out from the system pump can be introduced into the first waste liquid hole 14, thereby preventing the flow path from being blocked.

Alternatively, as shown in fig. 5, the projection of one end of first guide groove 21 on stator 1 is located at the center of stator 1, and the projection of the other end of first guide groove 21 on stator 1 is located on first circumference 191. Projections of one end of the second guide groove 22, one end of the fifth guide groove 25, one end of the seventh guide groove 27, and one end of the eighth guide groove 28 on the stator 1 are all located on the first circumference 191, and projections of the other end of the second guide groove 22, the other end of the fifth guide groove 25, the other end of the seventh guide groove 27, and the other end of the eighth guide groove 28 on the stator 1 are all located on the second circumference 192. The projection of the third guide groove 23 on the stator 1 is located on the first circumference 191 and extends in the circumferential direction of the first circumference 191, and the projection of the sixth guide groove 26 on the stator 1 is located on the first circumference 191 and extends in the circumferential direction of the first circumference 191. The projection of one end of the fourth guide channel 24 on the stator 1 is located on the first circumference 191. One end of the stator slot 19 is located on the first circumference 191.

Since the projection of one end of the first guide groove 21 on the stator 1 is located at the center of the stator 1, the first inlet hole 11 is located at the center of the stator 1, the projection of the other end of the first guide groove 21 on the stator 1 is located on the first circumference 191, and at the same time, the first connection hole 17, the second connection hole 18, the first waste liquid hole 14, one end of the stator groove 19, and the second waste liquid hole 15 are also located on the first circumference 191. Thus, as shown in fig. 6 to 9, in the first rotational position, the first inlet hole 11 and the outlet hole 16 may communicate through the first guide groove 21; in the second rotational position, first guide channel 21 may communicate first inlet aperture 11 with stator slots 19; in the third rotation position, the first guide groove 21 may communicate the first inlet hole 11 and the first connection hole 17; in the fourth rotational position, first channel 21 may communicate first inlet aperture 11 and first waste aperture 14.

Since the projections of one end of the second guide groove 22, one end of the fifth guide groove 25, one end of the seventh guide groove 27, and one end of the eighth guide groove 28 on the stator 1 are all located on the first circle 191, the projections of the other end of the second guide groove 22, the other end of the fifth guide groove 25, the other end of the seventh guide groove 27, and the other end of the eighth guide groove 28 on the stator 1 are all located on the second circle 192, and the first connection hole 17, the second connection hole 18, the outlet hole 16, the first waste liquid hole 14, and the second waste liquid hole 15 are located on the first circle 191, and the second inlet hole 12 and the third inlet hole 13 are located on the second circle 192. Thus, as shown in fig. 6 to 9, in the first rotational position, the second guide groove 22 may communicate the second inlet hole 12 and the first connection hole 17; in the second rotation position, the fifth guide groove 25 may communicate the third inlet hole 13 and the first connection hole 17; in the third rotational position, the seventh guide groove 27 may communicate the third inlet hole 13 and the second waste liquid hole 15; in the fourth rotational position, eighth channel 28 may communicate third inlet aperture 13 with outlet aperture 16.

Since the projection of the third guide groove 23 on the stator 1 is located on the first circumference 191 and extends in the circumferential direction of the first circumference 191. Therefore, as shown in fig. 6 to 8, in the first rotation position, the third guide groove 23 may communicate the second connection hole 18 and the second waste liquid hole 15 provided on the first circumference 191; in the third rotational position, the second connection hole 18 provided on the first circumference 191 and the outlet hole 16 may be communicated. And the projection of the sixth guide channel 26 on the stator 1 is located on the first circumference 191, so that in the second rotational position the sixth guide channel 26 can communicate the second connection hole 18 and the first waste liquid hole 14.

As shown in fig. 5, the third guide groove 23 and the sixth guide groove 26 are formed as long holes extending in the circumferential direction of the first circumference 191, so that the holes on the first circumference 191 are communicated with each other, and the difficulty of machining the guide grooves is reduced, thereby reducing the machining cost.

As shown in fig. 4, 5 and 7, since the projection of one end of the fourth guide groove 24 onto the stator 1 is located on the first circumference 191 and one end of the stator groove 19 is located on the first circumference 191, in the second rotational position the first inlet opening 11 is brought into communication with the outlet opening 16 via the first guide groove 21, the stator groove 19 and the fourth guide groove 24.

Alternatively, as shown in fig. 8 and 6, the second connection hole 18 is located between the outlet hole 16 and the first waste liquid hole 14, a central angle of the outlet hole 16 corresponding to the second connection hole 18 is equal to a central angle of the third diversion trench 23 corresponding to both ends, and a central angle of the third diversion trench 23 corresponding to both ends is equal to a central angle of the second connection hole 18 corresponding to the first waste liquid hole 14. In the third rotation position, the third guide groove 23 communicates the second connection hole 18 with the outlet hole 16, and as the rotor 2 rotates clockwise, the rotor 2 reaches the first rotation position, and the third guide groove 23 now communicates the second connection hole 18 with the first waste liquid hole 14. In both different rotational positions, the third guide channel 23 communicates with the second connection opening 18, while the second connection opening 18 is located between the outlet opening 16 and the first waste opening 14. Therefore, the central angle corresponding to the outlet hole 16 and the second connecting hole 18 is designed to be equal to the central angle corresponding to the second connecting hole 18 and the first waste liquid hole 14, and the central angles corresponding to the two ends of the third diversion trench 23 are equal to the central angles corresponding to the second connecting hole 18 and the first waste liquid hole 14, so that the third diversion trench 23 can communicate the second connecting hole 18 with different holes at different rotation positions, and the communication requirements of different rotation positions are met.

Alternatively, as shown in fig. 4, the first waste liquid hole 14 is formed as an elongated hole extending in the circumferential direction of the first circumference 191. The first waste liquid hole 14 is mainly used for receiving waste liquid discharged by the quantitative ring 101 or a system pump, and in order to reduce the alignment precision of the first waste liquid hole 14 and the diversion trench, the first waste liquid hole 14 is set to be a long hole extending along the circumferential direction of the first circumference 191, so that the diversion trench can be discharged into the first waste liquid hole 14 as long as the diversion trench and the first waste liquid hole 14 have a superposed part in projection, strict alignment is not required, on the premise of not influencing the technical effect, the processing cost and difficulty are reduced, and meanwhile, the situation that the diversion trench and the first waste liquid hole 14 cannot be aligned to cause liquid leakage and liquid seepage is prevented.

Optionally, as shown in FIG. 4, the difference between the radius of the second circumference 192 and the radius of the first circumference 191 is greater than or equal to 2. Since different holes are arranged on the first circumference 191 and the second circumference 192, different guide grooves communicate with different holes as the rotor 2 rotates, thereby communicating different flow paths. And the difference between the radius of the second circumference 192 and the radius of the first circumference 191 is more than or equal to 2, so that the holes on the first circumference 191 and the second circumference 192 can keep a distance without mutual interference, and the liquid in each hole cannot leak in the rotation process of the sample injection valve, thereby ensuring that the detection result of the liquid chromatograph has no deviation.

Optionally, as shown in fig. 1, the stator 1 is further formed with a first inlet port 111, a second inlet port 121, a third inlet port 131, a first waste port 141, a second waste port 151, an outlet port 161, a first connection port 171, and a second connection port 181; the first inlet port 111 is used for connecting the system pump and communicates with the first inlet hole 11, the second inlet port 121 is used for connecting the manual injector and communicates with the second inlet hole 12, the third inlet port 131 is used for connecting the sample pump and communicates with the third inlet hole 13, the first waste liquid port 141 communicates with the first waste liquid hole 14, the second waste liquid port 151 communicates with the second waste liquid hole 15, the outlet port 161 is used for connecting the chromatography column and communicates with the outlet hole 16, the first connecting port 171 is used for connecting the inlet of the quantitative ring 101 and communicates with the first connecting hole 17, and the second connecting port 181 is used for connecting the outlet of the quantitative ring 101 and communicates with the second connecting hole 18.

Among them, a part of the first inlet port 111, the second inlet port 121, the third inlet port 131, the first waste liquid port 141, the second waste liquid port 151, the outlet port 161, the first connection port 171, and the second connection port 181 is located on the first end surface 190 of the stator, and the other part is located on the outer circumferential surface of the stator 1.

Because the first end face 10 of the stator is in sealing contact with the first end face 20 of the rotor, and the first end face 10 of the stator is provided with a hole matched with the guide groove on the first end face 20 of the rotor, in order to connect the hole with other structures of the liquid chromatograph, the stator 1 is also provided with an interface communicated with the hole so as to connect different pipelines or equipment. One part of the first inlet interface 111, the second inlet interface 121, the third inlet interface 131, the first waste liquid interface 141, the second waste liquid interface 151, the outlet interface 161, the first connecting interface 171 and the second connecting interface 181 is located on the first end surface 190 of the stator, and the other part is located on the outer circumferential surface of the stator 1, that is, different interfaces are arranged on different surfaces of the stator 1, so that on one hand, the connection relationship between the interfaces and holes can be matched, and the arrangement of the internal flow path of the stator 1 is more scientific; on the other hand, certain distance is kept between the interfaces, so that certain clearance exists between pipelines or equipment matched with the interfaces, and the installation is more convenient.

Optionally, internal threads are further formed in the first inlet port 111, the second inlet port 121, the third inlet port 131, the first waste port 141, the second waste port 151, the outlet port 161, the first connection port 171, and the second connection port 181, so as to be matched with external threads on a joint of a pipeline or equipment, so as to fix the joint in the joint. Meanwhile, the thread matching is convenient to install and disassemble, and the assembly can be completed without special tools.

Alternatively, as shown in fig. 1, the outer peripheral surface of the stator 1 includes a cylindrical outer peripheral surface 194 and a tapered outer peripheral surface 193, the tapered outer peripheral surface 193 is located between the cylindrical outer peripheral surface 194 and the first end surface 190 of the stator, and the diameter of the tapered outer peripheral surface 193 is gradually reduced in a direction from the cylindrical outer peripheral surface 194 to the tapered outer peripheral surface 193. The first inlet port 111, the first waste liquid port 141, the second waste liquid port 151, and the outlet port 161 are located on the cylindrical outer peripheral surface 194. The first connection port 171, the second connection port 181, and the third inlet port 131 are located on the tapered outer peripheral surface 193. The second inlet port 121 is located on the first end face 190 of the stator. Providing the outer peripheral surface of the stator 1 with the cylindrical outer peripheral surface 194 and the tapered outer peripheral surface 193 allows the mouthpiece to be disposed on the cylindrical outer peripheral surface 194 and the tapered outer peripheral surface 193, increasing the disposition position of the mouthpiece. And, arrange the interface on different surfaces, the interface gets into the extending direction of stator 1 and also is different with the contained angle of horizontal plane to this satisfies different interface and arranges the needs, and is more nimble.

Alternatively, as shown in fig. 10 to 15, a first inner flow passage 31, a second inner flow passage 32, a third inner flow passage 33, a fourth inner flow passage 34, a fifth inner flow passage 35, a sixth inner flow passage 36, a seventh inner flow passage 37, and an eighth inner flow passage 38 are formed inside the stator 1; the first inlet port 111 communicates with the first inlet hole 11 through the first internal flow passage 31; the second inlet port 121 communicates with the second inlet bore 12 through the second internal flow passage 32; the third inlet port 131 communicates with the third inlet hole 13 through the third internal flow passage 33; the first waste liquid port 141 communicates with the first waste liquid hole 14 through the fourth internal flow passage 34; the second waste liquid port 151 communicates with the second waste liquid hole 15 through the fifth internal flow passage 35; the outlet port 161 communicates with the outlet hole 16 through the sixth internal flow passage 36; the first connection port 171 communicates with the first connection hole 17 through the seventh internal flow passage 37; the second connection port 181 communicates with the second connection hole 18 through the eighth internal flow passage 38. Linear flow passages extending in the radial direction of the stator 1 in the first inner flow passage 31, the fourth inner flow passage 34, the fifth inner flow passage 35, and the sixth inner flow passage 36; the second internal flow passage 32, the third internal flow passage 33, the seventh internal flow passage 37, and the eighth internal flow passage 38 are linear flow passages extending obliquely with respect to the radial direction.

Arrange different inside flow channel intercommunication interface and hole in stator 1's inside, make full use of stator 1's outer peripheral face, arrange the interface in the position of difference to through the inside flow channel intercommunication of mutually noninterference, make the joint can arrange on other terminal surfaces except the first terminal surface 10 of stator, guarantee under the prerequisite of pipeline intercommunication, make with interface complex joint mutually noninterfere and keep appropriate distance, convenient to install and dismantle.

Alternatively, as shown in fig. 10 and 15, the first inlet port 111, the first waste liquid port 141, the second waste liquid port 151, and the outlet port 161, and the first connection port 171, the second connection port 181, and the third inlet port 131 are offset from each other in the axial direction of the stator 1. Because the interface is arranged at the different positions of the outer peripheral surface and the second end surface of the stator 1, and the plurality of interfaces are staggered in the axial direction of the stator 1, the mutual interference of equipment or structures connected with the interfaces can be avoided, the mutual interference of internal flow channels can also be avoided, and the positions of the interfaces and the internal flow channels are reasonably arranged.

Alternatively, as shown in fig. 16, mutually perpendicular linear grooves 29 are formed on the second end surface of the rotor 2 for connection with a power mechanism to drive the rotor 2 to rotate.

As another aspect of the present disclosure, the present disclosure also provides a liquid chromatography analyzer, which includes a system pump, a sample pump, a manual injector, a chromatography column, a quantitative loop 101, and the above-mentioned injection valve.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, various possible combinations will not be separately described in this disclosure.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims (10)

1. The sample injection valve of the liquid chromatographic analyzer is characterized by comprising a stator and a rotor, wherein the rotor can rotate relative to the stator, and a first end face of the rotor is in sealing contact with a first end face of the stator;

a first inlet hole, a second inlet hole, a third inlet hole, a first waste liquid hole, a second waste liquid hole, an outlet hole, a first connecting hole, a second connecting hole and a stator groove are formed on the first end surface of the stator;

the first inlet hole is used for communicating with a system pump of a liquid chromatographic analyzer, the second inlet hole is used for communicating with a manual injector, the third inlet hole is used for communicating with a sample pump of the liquid chromatographic analyzer, the outlet hole is used for communicating with a chromatographic column of the liquid chromatographic analyzer, the first connecting hole is used for communicating with an inlet of a quantitative ring, and the second connecting hole is used for communicating with an outlet of the quantitative ring;

the first inlet hole is located at the center of the stator, the first connection hole, the second connection hole, the outlet hole, the first waste liquid hole, and the second waste liquid hole are located on a first circumference centered on the center of the stator, the second inlet hole and the third inlet hole are located on a second circumference centered on the center of the stator, and the radius of the second circumference is greater than that of the first circumference;

a first diversion trench, a second diversion trench, a third diversion trench, a fourth diversion trench, a fifth diversion trench, a sixth diversion trench and a seventh diversion trench which are mutually independent are formed on the first end surface of the rotor;

wherein the rotor has a first rotational position, a second rotational position, and a third rotational position;

in the first rotational position, the first diversion trench communicates the first inlet aperture with the outlet aperture, the second diversion trench communicates the second inlet aperture with the first connection aperture, and the third diversion trench communicates the second connection aperture with the first waste aperture;

in the second rotation position, the first guiding groove communicates the first inlet hole with the stator groove, the fourth guiding groove communicates the stator groove with the outlet hole, the fifth guiding groove communicates the third inlet hole with the first connection hole, and the sixth guiding groove communicates the second connection hole with the first waste liquid hole;

in the third rotation position, the first guide groove communicates the first inlet hole with the first connection hole, the third guide groove communicates the second connection hole with the outlet hole, and the seventh guide groove communicates the third inlet hole with the second waste liquid hole.

2. The sample injection valve of claim 1, wherein the rotor further comprises an eighth channel formed in the first end surface, the rotor further comprising a fourth rotational position, wherein the eighth channel communicates the third inlet port with the outlet port, and the first channel communicates the first inlet port with the first waste port.

3. The sample injection valve as claimed in claim 2, wherein a projection of one end of the first guiding flow groove on the stator is located at the center of the stator, and a projection of the other end of the first guiding flow groove on the stator is located on the first circumference;

projections of one end of the second diversion trench, one end of the fifth diversion trench, one end of the seventh diversion trench and one end of the eighth diversion trench on the stator are all located on the first circumference, and projections of the other end of the second diversion trench, the other end of the fifth diversion trench, the other end of the seventh diversion trench and the other end of the eighth diversion trench on the stator are all located on the second circumference;

the projection of the third diversion trench on the stator is positioned on the first circumference and extends along the circumferential direction of the first circumference, and the projection of the sixth diversion trench on the stator is positioned on the first circumference and extends along the circumferential direction of the first circumference;

the projection of one end of the fourth diversion trench on the stator is positioned on the first circumference;

one end of the stator slot is located on the first circumference.

4. The sample injection valve according to claim 1, wherein the second connection hole is located between the outlet hole and the first waste liquid hole, a central angle of the outlet hole corresponding to the second connection hole is equal to a central angle of the third diversion trench corresponding to two ends, and a central angle of the third diversion trench corresponding to two ends is equal to a central angle of the second connection hole corresponding to the first waste liquid hole.

5. The sample injection valve of claim 1, wherein the first waste port is formed as an elongated hole extending along a circumferential direction of the first circumference.

6. The sample injection valve of any of claims 1-5, wherein a difference between a radius of the second circumference and a radius of the first circumference is greater than or equal to 2.

7. The sample injection valve according to any one of claims 1 to 5, wherein the stator is further formed with a first inlet port, a second inlet port, a third inlet port, a first waste liquid port, a second waste liquid port, an outlet port, a first connection port, and a second connection port;

the first inlet interface is used for connecting the system pump and is communicated with the first inlet hole, the second inlet interface is used for connecting the manual injector and is communicated with the second inlet hole, the third inlet interface is used for connecting the sample pump and is communicated with the third inlet hole, the first waste liquid interface is communicated with the first waste liquid hole, the second waste liquid interface is communicated with the second waste liquid hole, the outlet interface is used for connecting the chromatographic column and is communicated with the outlet hole, the first connecting interface is used for connecting the inlet of the quantitative ring and is communicated with the first connecting hole, and the second connecting interface is used for connecting the outlet of the quantitative ring and is communicated with the second connecting hole;

one part of the first inlet interface, the second inlet interface, the third inlet interface, the first waste liquid interface, the second waste liquid interface, the outlet interface, the first connecting interface and the second connecting interface is positioned on the second end face of the stator, and the other part of the first inlet interface, the second inlet interface, the third waste liquid interface, the first waste liquid interface, the second waste liquid interface, the outlet interface, the first connecting interface and the second connecting interface is positioned on the outer peripheral face of the stator.

8. The sample injection valve according to claim 7, wherein the outer peripheral surface of the stator comprises a cylindrical outer peripheral surface and a tapered outer peripheral surface, the tapered outer peripheral surface is located between the cylindrical outer peripheral surface and the second end surface of the stator, and the diameter of the tapered outer peripheral surface is gradually reduced along the direction from the cylindrical outer peripheral surface to the second end surface;

the first inlet port, the first waste liquid port, the second waste liquid port and the outlet port are all positioned on the cylindrical peripheral surface;

the first connecting interface, the second connecting interface and the third inlet interface are all positioned on the conical peripheral surface;

the second inlet port is located on a second end face of the stator.

9. The sample injection valve according to claim 8, wherein the first inlet port, the first waste port, the second waste port, and the outlet port are staggered from the first connection port, the second connection port, and the third inlet port in an axial direction of the stator.

10. A liquid chromatography analyzer comprising a system pump, a sample pump, a manual injector, a chromatography column, a quantification loop, and the sample injection valve of any one of claims 1-9.

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