CN219455906U - Liquid-phase flow cell device and liquid-phase detection device - Google Patents

Abstract

The embodiment of the application provides a liquid phase flow cell device and liquid phase detection device relates to liquid phase detection technical field, liquid phase flow cell device includes: the flow cell comprises a flow cell body, wherein a fluid channel is arranged in the flow cell body, the fluid channel comprises a liquid inlet section, a middle section and a liquid outlet section, the liquid inlet section is communicated with a first end of the middle section, and the liquid outlet section is communicated with a second end of the middle section; window sheets and window sheet fixing pieces are respectively arranged at the two ends of the flow cell body and at positions corresponding to the middle section of the fluid channel; wherein the window sheet is blocked at the end part of the middle section; the window sheet fixing piece comprises a hollow fastening piece and an elastic piece, wherein the fastening piece is fixedly connected to the end part of the flow cell body, and the elastic piece is pressed between the fastening piece and the window sheet. The embodiment of the application is suitable for liquid phase detection of the fluid.

Description

Liquid-phase flow cell device and liquid-phase detection device

Technical Field

The application relates to the technical field of liquid phase detection, in particular to a liquid phase flow cell device and a liquid phase detection device.

Background

The liquid phase flow cell device is a key component of the liquid phase detection device. The liquid to be tested continuously flows in the liquid phase flow cell device, and the liquid phase detector detects the liquid in the liquid phase flow cell device to detect the properties, concentration and the like of the sample.

The existing liquid phase flow cell device generally comprises a flow cell body, wherein a fluid channel is arranged in the flow cell body, and window sheets and window sheet fixing pieces are arranged at two ends of the flow cell body; the window sheet fixing piece is rigidly connected with the window sheet, so that the window sheet is easy to be extruded to generate cracks.

Disclosure of Invention

The purpose of this application is to provide a liquid phase flow cell device and liquid phase detection device, can avoid the window piece to receive the extrusion and appear the crackle.

In a first aspect, the present application provides a liquid phase flow cell apparatus comprising: the flow cell comprises a flow cell body, wherein a fluid channel is arranged in the flow cell body, the fluid channel comprises a liquid inlet section, a middle section and a liquid outlet section, the liquid inlet section is communicated with a first end of the middle section, and the liquid outlet section is communicated with a second end of the middle section; window sheets and window sheet fixing pieces are respectively arranged at the two ends of the flow cell body and at positions corresponding to the middle section of the fluid channel; wherein the window sheet is blocked at the end part of the middle section;

the window sheet fixing piece comprises a hollow fastening piece and an elastic piece, wherein the fastening piece is fixedly connected to the end part of the flow cell body, and the elastic piece is pressed between the fastening piece and the window sheet.

In some embodiments of the present application, grooves are respectively provided at two ends of the flow cell body, and the grooves are coaxially arranged with the middle section and are communicated with the middle section; the window sheet is arranged in the groove; the window sheet fixing piece is provided with external threads, the inner wall of the groove is provided with internal threads, and the window sheet fixing piece is fixedly connected in the groove through the external threads and the internal threads.

In some embodiments of the present application, a guide support sleeve is further disposed in the groove, a guide support hole is formed in the middle of the guide support sleeve, and the window sheet is sleeved in the guide support hole.

In some embodiments of the present application, a gasket is further disposed within the recess between the resilient member and the window tab.

In some embodiments of the present application, the fastener has a receiving cavity and a limiting step inside, the elastic member is located in the receiving cavity, and an end of the elastic member away from the window sheet abuts against the limiting step; the window sheet is at least partially positioned within the receiving cavity.

In some embodiments of the present application, the first end and the second end of the middle section of the fluid channel have a flare, respectively, the liquid inlet section is in communication with the flare of the first end of the middle section, and the liquid outlet section is in communication with the flare of the second end of the middle section.

In some embodiments of the present application, the included angle of the axis of the liquid inlet section with respect to the axis of the middle section is 65-79 degrees.

In some embodiments of the present application, a distance between an intersection point between the axis of the liquid inlet section and the axis of the middle section and an inner surface of the window sheet is 0-0.1mm, and the inner surface of the window sheet is a surface of one side of the window sheet, which is close to the middle section.

In some embodiments of the present application, the elastic member is a belleville spring.

In some embodiments of the present application, the flow cell body is stainless steel; a stainless steel liquid inlet pipe is arranged in the liquid inlet section, and a stainless steel liquid outlet pipe is arranged in the liquid outlet section; a sealing ring is arranged between the window sheet and the end part of the middle section, and a through hole is formed in the middle of the sealing ring.

In a second aspect, embodiments of the present application provide a liquid phase detection device, including a light emitter and a liquid phase detector, where a liquid phase flow cell device is disposed between the light emitter and the liquid phase detector; wherein the liquid phase flow cell device is the liquid phase flow cell device according to any one of the embodiments.

In this application liquid phase flow cell device and liquid phase detection device embodiment, the window piece shutoff is in the tip of interlude, and window piece mounting includes hollow fastener and elastic component, and fastener fixed connection is at the tip of flow cell body, and the elastic component is pressed between fastener and window piece, that is to say, the fastener passes through the elastic component with window piece shutoff at the tip of interlude, and the elastic component can play buffer protection's effect to the window piece under the elastic action, avoids the window piece to appear the crackle by the direct extrusion of fastener, also is convenient for the window piece bear great fluid pressure.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that are required to be used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained from these drawings without inventive effort to a person skilled in the art.

For a more complete understanding of the present application and the advantages thereof, reference is now made to the following descriptions taken in conjunction with the accompanying drawings. Wherein like reference numerals refer to like parts throughout the following description.

FIG. 1 is a cross-sectional view of a liquid phase flow cell apparatus according to an embodiment of the present application;

FIG. 2 is an exploded view of the liquid flow cell apparatus shown in FIG. 1;

FIG. 3 is a cross-sectional view of the flow cell body shown in FIG. 1;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

FIGS. 5a to 5d are graphs showing the effect of the liquid having a low diffusion delamination phenomenon when flowing in the middle section in the embodiments of the present application;

FIG. 6 is a cross-sectional view of another embodiment of a liquid flow cell apparatus of the present application.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

For ease of description, spatially relative terms, such as "inner," "outer," "lower," "below," "upper," "above," and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein interpreted accordingly.

Referring to fig. 1 and 2, an embodiment of the present application provides a liquid phase flow cell device, including: the flow cell comprises a flow cell body 11, wherein a fluid channel 12 is arranged in the flow cell body 11, the fluid channel 12 comprises a liquid inlet section 121, a middle section 122 and a liquid outlet section 123, the liquid inlet section 121 is communicated with a first end of the middle section 122, and the liquid outlet section 123 is communicated with a second end of the middle section 122; a window sheet 13 and a window sheet fixing member 14 are respectively arranged at the two ends of the flow cell body 11 and at the positions corresponding to the middle section 122 of the fluid channel 12; wherein the window 13 is blocked at the end of the middle section 122; the window sheet fixing member 14 includes a hollow fastening member 141 and an elastic member 142, the fastening member 141 being fixedly attached to the end of the flow cell body 11, and the elastic member 142 being pressed between the fastening member 141 and the window sheet 13.

The elastic member 142 may be a belleville spring, a cylindrical spring, a tower spring, etc.

In use, liquid flows in sequence along the directions of the liquid inlet section 121, the middle section 122 and the liquid outlet section 123. At one end of the flow cell body 11, the detection light sequentially passes through the fastener 141, the elastic member 142 and the window sheet 13, enters the intermediate section 122 from one end (such as the first end) of the intermediate section 122, is reflected and absorbed for multiple times by the liquid in the intermediate section 122, and is emitted from the other end (such as the second end) of the intermediate section 122, and is received by a detector (not shown) at the other end of the flow cell body 11, and finally, the information such as the sample property and the sample concentration of the liquid can be obtained by measuring the light intensity of the emitted light by the detector.

In this embodiment, window piece 13 shutoff is at the tip of interlude 122, window piece mounting 14 includes hollow fastener 141 and elastic component 142, fastener 141 fixed connection is at the tip of flow cell body 11, elastic component 142 is pressed between fastener 141 and window piece 13, that is to say, fastener 141 is through the tip of elastic component 142 shutoff window piece 13 at interlude 122, elastic component 142 can play the effect of buffering protection to window piece 13 under the elastic action, avoid window piece 13 to receive the direct extrusion of fastener 141 and appear the crackle, also be convenient for window piece 13 bear great fluid pressure.

The fastening member 141 may be fixedly coupled to the end of the flow cell body 11 by screw coupling or screw coupling.

Referring to fig. 1 and 2, to reduce the external dimensions of the liquid phase flow cell device, in some embodiments, grooves 15 are provided at both ends of the flow cell body 11, respectively, the grooves 15 being disposed coaxially with the middle section 122 and communicating with the middle section 122; the window sheet 13 is arranged in the groove 15; the fastener 141 is provided with external threads, the inner wall of the groove 15 is provided with internal threads, and the fastener 141 is fixedly connected in the groove 15 through the external threads on the fastener and the internal threads of the inner wall of the groove 15. The window 13, the elastic member 142 and the fastening member 141 are provided in the recess 15 at the end of the flow cell body 11, so that excessive external space is not occupied, and the external overall size of the flow cell device is relatively small.

When the window 13 is arranged in the groove 15 at the end part of the phase flow tank device, in order to transversely guide and longitudinally position the window 13, in some embodiments, a guide support sleeve 16 is further arranged in the groove 15, a guide support hole is formed in the middle of the guide support sleeve 16, and the window 13 is sleeved in the guide support hole. In some examples, the outer circumference of the guide support sleeve 16 may mate with the inner wall of the groove 15. When the elastic piece 142 applies force to the window piece 13, the guiding support hole can play a role in moving and guiding the window piece 13, so that the window piece 13 is always in a position opposite to the middle section 122, and lateral offset of the window piece 13 in the groove 15 is avoided. In addition, because the window sheet 13 is sleeved in the guide supporting hole, the guide supporting hole can also play a role in protecting the window sheet 13, and the occurrence of cracks of the window sheet 13 caused by overlarge stress can be further reduced.

In some embodiments, the end of the elastic member 142 contacting the window 13 may not be a flat surface, so that the force applied by the elastic member 142 to the window 13 may be uneven up and down or left and right, and for this purpose, a gasket 17 may be further disposed between the elastic member 142 and the window 13 in the groove 15. The force exerted by the elastic member 142 is uniformly transmitted to the window 13 through the gasket 17. The gasket 17 may be a metal gasket.

To further reduce the external dimensions of the liquid flow cell apparatus, in some embodiments, the fastener 141 has a receiving cavity and a limiting step inside, the elastic member 142 is located in the receiving cavity, and an end of the elastic member 142 away from the window sheet 13 abuts against the limiting step; the window tab 13 is at least partially located within the receiving cavity. This makes it possible to fully utilize the space inside the fastener 141, making the fit between the fastener 141, the elastic member 142 and the window sheet 13 more compact. When the washer 17 is provided between the elastic member 142 and the window piece 13, the washer 17 is also located in the receiving cavity inside the fastener 141.

Referring to fig. 3, in some embodiments, the first and second ends of the intermediate section 122 of the fluid passageway 12 each have a flare that directs fluid, the inlet section 121 communicates with the flare of the first end of the intermediate section 122, and the outlet section 123 communicates with the flare of the second end of the intermediate section 122.

Referring to FIG. 3, in some embodiments, the angle a of the axis of the intake section 121 relative to the axis of the intermediate section 122 is 65-79 degrees, i.e., the inlet angle of the fluid entering the intermediate section 122 through the intake section 121 is 65-79 degrees. According to laminar flow and convection diffusion principles in fluid mechanics and through analysis of commercial combol software, according to the included angles, liquid flows in sequence along the directions of the liquid inlet section 121, the middle section 122 and the liquid outlet section 123, mutual rejection of the liquid in the middle section 122 is avoided, unsmooth flow of the liquid in the middle section 122 is prevented, diffusion layering phenomenon of components in the liquid can be reduced, good peak output of signals is guaranteed, and meanwhile, good guiding and drainage effects are achieved.

Referring to fig. 4, on the basis that the included angle a of the axis of the liquid inlet section 121 relative to the axis of the middle section 122 is 65-79 degrees, the distance H between the intersection point B of the axis of the liquid inlet section 121 and the axis of the middle section 122 and the inner surface of the window 13 may be 0-0.1mm, so that each component in the liquid has a lower diffusion layering phenomenon, and a better peak of the signal is ensured, wherein the inner surface of the window 13 is the surface of the side of the window 13 close to the middle section 122. Fig. 5a to 5d are diagrams showing the effect of the liquid having a lower diffusion delamination phenomenon when flowing in the middle section according to an embodiment of the present application.

Referring to fig. 2, in some embodiments, in order to reduce the production cost and the process cost, the material of the flow cell body 11 may be stainless steel, and the stainless steel liquid inlet pipe 18 is disposed in the liquid inlet section 121, so that the processing precision requirement of the liquid inlet section 121 may be reduced, and the stainless steel liquid outlet pipe 19 is disposed in the liquid outlet section 123, so that the processing precision requirement of the liquid outlet section 123 may also be reduced.

The inner diameter of the portion of the liquid inlet section 121 remote from the intermediate section 122 is greater than the inner diameter of the portion proximate to the intermediate section 122, and the stainless steel liquid inlet tube 18 may be welded by vacuum brazing within the portion of the liquid inlet section 121 remote from the intermediate section 122. Accordingly, the inner diameter of the portion of the liquid outlet section 123 remote from the intermediate section 122 is larger than the inner diameter of the portion near the intermediate section 122, and the stainless steel liquid outlet pipe 19 may be welded in the portion of the liquid outlet section 123 remote from the intermediate section 122 by vacuum brazing.

Referring to fig. 1 and 2, in some embodiments, a seal 20 may be provided between the window tab 13 and the end of the intermediate section 122 to prevent leakage of the liquid from the intermediate section 122 at a relatively high pressure (e.g., 1400 PSI). The sealing member is made of polyether-ether-ketone, and the thickness of the sealing member can be 0.2-0.3mm. The end of the intermediate section 122 may be provided with a seal receiving groove 21, and the seal 20 may be embedded in the seal receiving groove 21.

Referring to fig. 6, in some embodiments, the liquid phase flow cell apparatus may further comprise a housing 30, the flow cell body 11 being disposed within the housing 30, the housing 30 supporting and protecting the flow cell body 11.

The embodiment of the application also provides a liquid phase detection device, which comprises a light emitter and a liquid phase detector, wherein a liquid phase flow cell device is arranged between the light emitter and the liquid phase detector; the liquid-phase flow cell device is any one of the liquid-phase flow cell devices described in the foregoing embodiments. The liquid phase detection device of the embodiment has the technical effects corresponding to the liquid phase flow cell device.

In this specification, each embodiment is described in a related manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions easily conceivable by those skilled in the art within the technical scope of the present application should be covered in the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (11)

1. A liquid flow cell apparatus, comprising: the flow cell comprises a flow cell body, wherein a fluid channel is arranged in the flow cell body, the fluid channel comprises a liquid inlet section, a middle section and a liquid outlet section, the liquid inlet section is communicated with a first end of the middle section, and the liquid outlet section is communicated with a second end of the middle section;

window sheets and window sheet fixing pieces are respectively arranged at the two ends of the flow cell body and at positions corresponding to the middle section of the fluid channel;

wherein the window sheet is blocked at the end part of the middle section;

the window sheet fixing piece comprises a hollow fastening piece and an elastic piece, wherein the fastening piece is fixedly connected to the end part of the flow cell body, and the elastic piece is pressed between the fastening piece and the window sheet.

2. The liquid-phase flow cell device according to claim 1, wherein grooves are respectively provided at both ends of the flow cell body, the grooves being coaxially provided with the intermediate section and communicating with the intermediate section;

the window sheet is arranged in the groove;

the window sheet fixing piece is provided with external threads, the inner wall of the groove is provided with internal threads, and the window sheet fixing piece is fixedly connected in the groove through the external threads and the internal threads.

3. The liquid-phase flow cell device according to claim 2, wherein a guide support sleeve is further arranged in the groove, a guide support hole is formed in the middle of the guide support sleeve, and the window sheet is sleeved in the guide support hole.

4. The liquid flow cell apparatus according to claim 2, wherein a gasket is further provided between the elastic member and the window sheet in the groove.

5. The liquid phase flow cell device according to claim 1, wherein the fastener is internally provided with a containing cavity and a limiting step, the elastic piece is positioned in the containing cavity, and one end of the elastic piece, which is far away from the window sheet, is abutted against the limiting step; the window sheet is at least partially positioned within the receiving cavity.

6. The liquid flow cell apparatus of claim 1, wherein the first and second ends of the intermediate section of the fluid channel each have a flare, the liquid inlet section is in communication with the flare of the first end of the intermediate section, and the liquid outlet section is in communication with the flare of the second end of the intermediate section.

7. The liquid flow cell apparatus of claim 1, wherein the angle of the axis of the liquid inlet section relative to the axis of the intermediate section is 65-79 degrees.

8. The liquid-phase flow cell apparatus according to claim 1, wherein a distance between an intersection point between an axis of the liquid inlet section and an axis of the intermediate section and an inner surface of the window sheet, which is a surface of a side of the window sheet close to the intermediate section, is 0 to 0.1 mm.

9. The liquid flow cell apparatus according to claim 1, wherein the elastic member is a belleville spring.

10. The liquid phase flow cell apparatus according to claim 1, wherein the flow cell body is made of stainless steel; a stainless steel liquid inlet pipe is arranged in the liquid inlet section, and a stainless steel liquid outlet pipe is arranged in the liquid outlet section;

a sealing ring is arranged between the window sheet and the end part of the middle section, and a through hole is formed in the middle of the sealing ring.

11. The liquid phase detection device is characterized by comprising a light emitter and a liquid phase detector, wherein a liquid phase flow cell device is arranged between the light emitter and the liquid phase detector; wherein the liquid phase flow cell device is a liquid phase flow cell device according to any of the preceding claims 1-10.