Flow cell and fluid monitoring device

Abstract

The application discloses a flow cell and a fluid monitoring device. The flow cell comprises a body, an inlet, an outlet, an internal channel extending from the inlet to the outlet, and a receiver comprising a receiving cavity and a first opening, the receiving cavity and the internal channel being in communication through the first opening; a flow tube arranged in the internal channel, the flow tube defining a fluid flow channel inside, at least a part of the flow tube being arranged to be transparent to light to form a light-transmissive section, the light-transmissive section being arranged opposite to the first opening; and a sealing device configured to form a seal between the body and the flow tube to block the fluid flow. The flow cell disclosed by the application can isolate the functional element from the fluid in the flow tube without direct contact, reduce the requirements for the sealing and material of the functional element, and thus reduce the cost of the functional element. In addition, the flexible disassembly between the functional element and the flow cell is facilitated, and the use convenience is improved.

Description

Technical Field

[0001] The present application belongs to the field of fluid monitoring technology, and in particular relates to a circulation pool and a fluid monitoring device. Background Art

[0002] In hazardous chemical, pharmaceutical and other industries, fluid monitoring equipment is usually required to conduct online monitoring of liquids, gases and other fluids. Optical characterization technology based on the Raman effect and fluorescence has become an important tool for online monitoring in hazardous chemical, pharmaceutical and other industries. In such applications, a circulation cell is usually connected to the reaction pipeline, and the reaction process is monitored by a Raman probe. Currently, most existing technologies use immersion probes for monitoring, that is, the probe is inserted into the circulation cell so that the probe is directly in contact with the fluid in the circulation cell or exposed to the fluid passing through the circulation cell. This immersion probe has very high requirements for sealing and materials, resulting in higher overall costs and the probe is not easy to disassemble and assemble. Summary of the Invention

[0003] The embodiments of the present application provide a circulation cell and a fluid monitoring device to reduce the requirements for functional components used in conjunction with the circulation cell to reduce its cost and facilitate the disassembly and assembly of the functional components.

[0004] According to the first aspect of the present application, the present application provides a circulation pool, which includes: a main body, including an inlet, an outlet, an internal channel and a receiver, the internal channel extends from the inlet to the outlet, the receiver includes a receiving cavity and a first opening, the receiving cavity and the internal channel are connected through the first opening; a circulation tube, arranged in the internal channel, the interior of the circulation tube is defined by a fluid flow channel, at least a portion of the section of the circulation tube is light-transmitting to form a light-transmitting section, and the light-transmitting section is arranged opposite to the first opening; and a sealing device, configured to form a seal between the main body and the circulation tube to block the inflow of fluid.

[0005] Optionally, the circulation pool also includes: a reflector, arranged on the main body, the receiver and the reflector are respectively arranged on opposite sides of the light-transmitting section along the first direction, so that the reflector reflects the light emitted from the first opening and passing through the light-transmitting section, and the first direction intersects with the axial direction of the light-transmitting section.

[0006] Optionally, the main body also includes a protrusion, which defines an accommodating cavity. The reflector is arranged in the accommodating cavity. The inner end of the accommodating cavity is connected to the internal channel, and the outer end of the accommodating cavity is closed by a pressure cover; the internal channel extends along the second direction, and the receiving cavity and the accommodating cavity both extend along the first direction, and are respectively located on two opposite sides of the internal channel along the first direction, and the first direction and the second direction intersect.

[0007] Optionally, the circulation tube extends from the inlet to the outlet and matches the shape of the internal channel; the sealing device includes a first tubular connector and a first sealing assembly, the first tubular connector is connected to the body at the inlet, and the first sealing assembly is in contact and sealed with the first tubular connector, the inlet, and the first tube opening of the circulation tube adjacent to the inlet.

[0008] Optionally, the inner circumferential wall of the inlet is provided with a first step portion, and the inner circumferential wall of the first tubular connecting piece is provided with a second step portion; the first sealing assembly includes a first sealing piece, the first sealing piece has a cylindrical portion and a ring portion extending circumferentially along the cylindrical portion, the cylindrical portion is inserted between the first step portion and the first pipe mouth, the inner circumferential wall of the cylindrical portion abuts against the outer pipe wall of the first pipe mouth, the outer circumferential wall of the cylindrical portion abuts against the first step portion, the first end face of the ring portion along its axial direction abuts against the end face of the inlet, and the second end face of the ring portion along its axial direction opposite to the first end face abuts against the second step portion.

[0009] Optionally, the inner circumferential wall of the first tubular connecting member is also provided with a circumferentially extending receiving groove, and the second step portion extends radially outward from the groove opening of the receiving groove toward the inlet; the first sealing assembly also includes a second sealing member, which is provided in the receiving groove and abuts against the second end face of the ring portion and the end face of the first pipe opening.

[0010] Optionally, the first sealing assembly further includes a third seal, which is disposed on the first step portion, and the end face of the cylinder along its axial direction abuts against the third seal; and / or the axial depth of the accommodating groove is less than the axial thickness of the second seal.

[0011] Optionally, the receiver also includes a receiving body and a fixing member, and a receiving cavity is formed in the receiving body; the receiving body is provided with a fixing hole radially passing through its peripheral wall, and the fixing member is movably connected to the fixing hole along the radial direction of the receiving body to change its length extending into the receiving cavity.

[0012] Optionally, the receiver also includes a receiving body, and a receiving cavity is formed in the receiving body; the inner circumferential wall of the receiving body is provided with a limiting portion adjacent to the first opening, the limiting portion extends along the circumference of the inner circumferential wall and protrudes radially inward from the inner circumferential wall of the receiving body to limit the length of the functional element inserted into the receiving cavity.

[0013] According to the second aspect of the present application, the present application also provides a fluid monitoring device, characterized in that it includes a functional element, a fluid input tube, a fluid output tube and a circulation pool provided by any of the above embodiments, the fluid input tube is connected to the inlet fluid of the circulation pool, the fluid output tube is connected to the outlet fluid of the circulation pool, the functional element is connected to the circulation pool via the receiving cavity of the circulation pool, and is configured to emit light to the fluid flow channel in the circulation tube through the light-transmitting section of the circulation tube.

[0014] The circulation pool provided in an embodiment of the present application includes a body, a circulation tube and a sealing device. A fluid flow channel is defined in the circulation tube to allow the fluid to flow in the circulation tube. The body includes an internal channel extending from its inlet to its outlet, and the circulation tube is arranged in the internal channel of the body. The body also includes a receiver, the receiver includes a receiving cavity and a first opening, and the receiving cavity and the internal channel are connected through the first opening. The receiving cavity can receive a functional element for monitoring the fluid, and the functional element can be exposed to the internal channel through the first opening. The circulation tube has a light-transmitting section, which is arranged opposite to the first opening. Therefore, the light emitted by the functional element can be irradiated to the light-transmitting section through the first opening, and then penetrate into the interior of the circulation tube through the light-transmitting section to irradiate the fluid, thereby facilitating the purpose of monitoring the fluid. In the circulation pool provided in an embodiment of the present application, the fluid flows in the circulation tube, and the sealing device can form a fluid seal between the body and the circulation tube, effectively preventing the fluid in the circulation tube from penetrating into the internal channel and the receiving cavity of the body. That is, there is no fluid in the internal channel and the receiving cavity of the body. After the functional element is connected to the circulation pool through the receiving cavity, it is exposed to the internal channel through the first opening. On the one hand, the light-transmitting section allows the functional element to illuminate the fluid in the circulation tube to realize the fluid monitoring function. On the other hand, it also isolates the functional element from the fluid in the circulation tube and prevents direct contact, thereby reducing the requirements for sealing and materials of the functional element and thus reducing its cost. It also facilitates flexible disassembly and assembly between the functional element and the circulation pool, thereby improving ease of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 This is a schematic diagram of the structure of a circulation pool provided in one embodiment of the present application.

[0017] Figure 2 yes Figure 1 Schematic diagram of the exploded structure of the flow cell shown.

[0018] Figure 3 yes Figure 1 Schematic diagram of the cross-sectional structure along direction CC.

[0019] Figure 4 yes Figure 1 Schematic diagram of the cross-sectional structure of the circulation pool body shown.

[0020] Figure 5 yes Figure 1 Schematic diagram of the side view structure of the circulation pool shown.

[0021] Figure 6 yes Figure 5 Schematic diagram of the cross-sectional structure along direction BB.

[0022] Figure 7 yes Figure 6 Schematic diagram of the enlarged structure of area A.

[0023] Figure 8 It is a structural diagram of a fluid monitoring device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0024] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present application and are not configured to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is merely to provide a better understanding of the present application by illustrating the examples of the present application.

[0025] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, the elements defined by the phrase "comprising..." do not exclude the presence of other identical elements in the process, method, article, or device comprising the elements.

[0026] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The embodiments will be described in detail below with reference to the accompanying drawings.

[0027] Figure 1 This is a schematic diagram of the structure of a circulation cell provided in one embodiment of the present application. Figure 2 yes Figure 1 Schematic diagram of the exploded structure of the flow cell shown. Figure 1 and Figure 2 The flow cell 100 provided in the embodiment of the present application includes a body 10, a flow tube 20 and a sealing device 30.

[0028] Figure 3 yes Figure 1 Schematic diagram of the cross-sectional structure along direction CC, Figure 4 yes Figure 1 The cross-sectional structure diagram of the flow cell body is shown. Figures 1 to 4 The body 10 includes an inlet 111, an outlet 121, an internal passage 13, and a receiver 14. The internal passage 13 extends from the inlet 111 to the outlet 121. The receiver 14 includes a receiving cavity 141 and a first opening 142. The receiving cavity 141 and the internal passage 13 are connected through the first opening 142. The flow tube 20 is disposed in the internal passage 13. The flow tube 20 defines a fluid flow channel 21. At least a portion of the flow tube 20 is light-transmissive, forming a light-transmissive section 22. The light-transmissive section 22 is disposed opposite the first opening 142. The sealing device 30 is configured to form a seal between the body 10 and the flow tube 20 to block the inflow of fluid.

[0029] The flow cell 100 may receive the sample fluid through a tube opening of the flow tube 20 adjacent to the inlet 111 , and guide the sample fluid to a tube opening of the flow tube 20 adjacent to the outlet 121 through the flow tube 20 .

[0030] The body 10 may include a first raised portion 11 and a second raised portion 12. The first raised portion 11 and the second raised portion 12 are connected, and each of the first raised portion 11 and the second raised portion 12 has a hollow passage formed therein. The hollow passages of the first raised portion 11 and the second raised portion 12 are connected to form an internal passage 13. An inlet 111 may be formed at a port of the first raised portion 11 facing away from the second raised portion 12, and an outlet 121 may be formed at a port of the second raised portion 12 facing away from the first raised portion 11.

[0031] The internal channel 13 may extend straight along a preset direction, or may extend in a bent manner, or may extend in a curved manner.

[0032] The receiving cavity 141 may be in communication with a middle section of the internal channel 13, the middle section being between the inlet 111 and the outlet 121. Alternatively, the receiving cavity 141 may be in communication with the very center of the internal channel 13 along its axial direction.

[0033] There is an interface between the flow tube 20 and the body 10 . The sealing device 30 can form a seal between the interface between the body 10 and the flow tube 20 , thereby blocking the fluid in the flow tube 20 from flowing into the interface between the body 10 and the flow tube 20 .

[0034] The light-transmitting section 22 can be a partial section of the flow tube 20. For example, the light-transmitting section 22 can be the middle section of the flow tube 20. The first opening 142 is disposed opposite the light-transmitting section 22. The light-transmitting section 22 can also be the entire section of the flow tube 20, that is, the flow tube 20 is entirely light-transmitting, and the first opening 142 can be disposed opposite any position of the flow tube 20. For example, the flow tube 20 can be an entirely transparent tube.

[0035] It can be understood that the fluid involved in the embodiments of the present application refers to gas, liquid or a mixture of gas and liquid.

[0036] The flow cell 100 provided in an embodiment of the present application includes a body 10, a flow tube 20 and a sealing device 30. A fluid flow channel 21 is defined in the flow tube 20 to allow fluid to flow in the flow tube 20. The body 10 includes an internal channel 13 extending from its inlet 111 to its outlet 121, and the flow tube 20 is disposed in the internal channel 13 of the body 10. The body 10 also includes a receiver 14, which includes a receiving cavity 141 and a first opening 142. The receiving cavity 141 and the internal channel 13 are connected through the first opening 142. The receiving cavity 141 can receive a functional element for monitoring the fluid, thereby connecting the functional element to the flow cell 100. The functional element can be exposed to the internal channel 13 through the first opening 142. The flow tube 20 has a light-transmitting section 22, which is arranged opposite to the first opening 142. Therefore, the light emitted by the functional element can be irradiated to the light-transmitting section 22 through the first opening 142, and then penetrate through the light-transmitting section 22 into the interior of the flow tube 20 to irradiate the fluid, thereby achieving the purpose of monitoring the fluid.

[0037] In the circulation pool 100 provided in the embodiment of the present application, the fluid flows in the circulation tube 20, and the sealing device 30 can form a fluid seal between the main body 10 and the circulation tube 20, effectively preventing the fluid in the circulation tube 20 from penetrating into the internal channel 13 and the receiving cavity 141 of the main body 10. That is, there is no fluid in the internal channel 13 and the receiving cavity 141 of the main body 10. After the functional element is connected to the circulation pool 100 through the receiving cavity 141, it is exposed to the internal channel 13 through the first opening 142. On the one hand, the light-transmitting section 22 can allow the functional element to illuminate the fluid in the circulation tube 20 to realize the fluid monitoring function. On the other hand, it also isolates the functional element from the fluid in the circulation tube 20 and does not directly contact it, thereby reducing the requirements for the sealing and material aspects of the functional element and thus reducing its cost. It also facilitates the flexible disassembly and assembly between the functional element and the circulation pool 100, thereby improving the convenience of use.

[0038] Figure 5 yes Figure 1 The side view of the flow cell is shown in FIG. Figure 6 yes Figure 5Schematic diagram of a cross-sectional structure along direction BB. In some embodiments, the flow cell 100 further includes a reflector 40, which is disposed on the body 10. The receiver 14 and the reflector 40 are respectively disposed on opposite sides of the light-transmitting segment 22 along a first direction X, so that the reflector 40 reflects light emitted from the first opening 142 and passing through the light-transmitting segment 22. The first direction X intersects the axial direction of the light-transmitting segment 22.

[0039] The reflector 40 may be a plane reflector, a spherical reflector or an aspherical reflector.

[0040] The first direction X may intersect the axial direction of the light-transmitting segment 22 perpendicularly, or may intersect the axial direction of the light-transmitting segment 22 at an oblique angle other than 90 degrees.

[0041] The receiver 14 is arranged opposite to the light-transmitting segment 22 on one side of the light-transmitting segment 22 along the first direction X, and the reflector 40 is arranged opposite to the light-transmitting segment 22 on the other side of the light-transmitting segment 22 along the first direction X, so as to allow light emitted by the functional element connected to the receiver 14 to enter the interior of the light-transmitting segment 22 and allow light in the light-transmitting segment 22 to be emitted toward the reflector 40.

[0042] In the embodiment of the present application, a reflector 40 is provided on the side of the light-transmitting section 22 opposite to the receiver 14. After the light emitted by the functional element connected to the receiver 14 irradiates the light-transmitting section 22, the reflector 40 can reflect at least part of the light scattered within the light-transmitting section 22, thereby enhancing the intensity of the light signal that the functional element can receive, thereby improving the fluid monitoring effect.

[0043] In some embodiments, the main body 10 further includes a protrusion 15 , which defines an accommodating cavity 151 , in which the reflector 40 is disposed. The inner end of the accommodating cavity 151 is connected to the internal channel 13 , and the outer end of the accommodating cavity 151 is closed by a pressure cover 50 .

[0044] The gland 50 is detachably connected to the protruding portion 15 to facilitate compression of the reflector 40 and facilitate removal and replacement of the reflector 40. The connection between the gland 50 and the protruding portion 15 includes, but is not limited to, threaded connection, snap-fit ​​connection, and the like. For example, the exterior of the gland 50 may be provided with external threads, the cavity wall of the accommodating cavity 151 may be provided with internal threads, and the end surface of the gland 50 may be provided with a groove in a straight, cross, or other shape to facilitate screwing the gland 50 into the protruding portion 15 using a tightening tool.

[0045] In the embodiment of the present application, the protrusion 15 is provided to accommodate the reflector 40, thereby facilitating the assembly of the reflector 40. The pressure cover 50 can press the reflector 40 from the outer end of the protrusion 15 to prevent the reflector 40 from falling off or loosening.

[0046] In some embodiments, the internal channel 13 extends along the second direction Y, the receiving cavity 141 and the accommodating cavity 151 both extend along the first direction X and are respectively located on opposite sides of the internal channel 13 along the first direction X, and the first direction X and the second direction Y intersect.

[0047] The internal channel 13 may be a channel extending straight along the first direction X. Thus, the circulation tube 20 may be a tube extending straight from the inlet 111 to the outlet 121 , which facilitates the processing and assembly of the circulation tube 20 , and the integrated circulation tube 20 does not need to consider sealing.

[0048] Both the receiving cavity 141 and the accommodating cavity 151 may be channels extending straight along the second direction Y, thereby facilitating the connection of functional elements and the assembly of the reflector 40 .

[0049] In some embodiments, the flow tube 20 extends from the inlet 111 to the outlet 121 and matches the shape of the internal channel 13. For example, the flow tube 20 can be a round tube and the internal channel 13 can be a cylindrical channel. The outer diameter of the flow tube 20 is substantially the same as the diameter of the internal channel 13.

[0050] Furthermore, the sealing device 30 includes a first tubular connector 31 and a first sealing assembly 32. The first tubular connector 31 is connected to the body 10 at the inlet 111. The first sealing assembly 32 contacts and seals the first tubular connector 31, the inlet 111, and the first pipe opening 23 of the flow pipe 20 adjacent to the inlet 111.

[0051] The central axis of the first tubular connector 31 may extend along the second direction Y, and the central axis of the first tubular connector 31 , the central axis of the inner channel 13 , and the central axis of the flow tube 20 may coincide with each other.

[0052] The connection method between the first tubular connector 31 and the body 10 includes, but is not limited to, threaded connection, clamping, welding, etc. For example, the interior of the first tubular connector 31 is provided with an internal thread, and the outer peripheral wall of the inlet 111 of the body 10 is provided with an external thread, and the internal thread of the first tubular connector 31 is threadedly connected to the external thread at the inlet 111.

[0053] The first sealing component 32 can be arranged between the first tubular connector 31, the inlet 111 and the first pipe opening 23. When the first tubular connector 31 is connected to the main body 10, it can press the first sealing component 32 between the inlet 111 of the main body 10 and the first pipe opening 23 of the circulation tube 20, thereby achieving fluid sealing between the inlet 111 of the main body 10 and the first pipe opening 23 of the circulation tube 20.

[0054] Figure 7 yes Figure 6 Schematic diagram of the enlarged structure of area A. Figure 2 、 Figure 3 and Figure 7 In some embodiments, the inner circumferential wall of the inlet 111 is provided with a first step 1111, and the inner circumferential wall of the first tubular connector 31 is provided with a second step 311. The first sealing assembly 32 includes a first sealing member 321, which has a cylindrical portion 3211 and a ring portion 3212 extending circumferentially of the cylindrical portion 3211. The cylindrical portion 3211 is inserted between the first step 1111 and the first pipe opening 23. The inner circumferential wall of the cylindrical portion 3211 abuts against the outer pipe wall of the first pipe opening 23, and the outer circumferential wall of the cylindrical portion 3211 abuts against the first step 1111. The first end surface 3212a of the ring portion 3212 along the axial direction abuts against the end surface of the inlet 111, and the second end surface 3212b of the ring portion 3212, which is opposite to the first end surface 3212a along the axial direction, abuts against the second step 311.

[0055] The first step portion 1111 extends radially outward to form a gap between the first step portion 1111 and the outer peripheral wall of the circulation tube 20 , and the cylindrical portion 3211 of the first sealing member 321 is inserted into the gap.

[0056] Optionally, the cylindrical portion 3211 is in compression contact with the first step portion 1111 and the outer peripheral wall of the circulation tube 20, the first end face 3212a of the ring portion 3212 is in compression contact with the end face of the inlet 111, and the second end face 3212b of the ring portion is in compression contact with the second step portion 311 to improve the sealing effect.

[0057] The first sealing member 321 may be a cylindrical sealing rubber plug.

[0058] By providing the first step portion 1111, the second step portion 311 and the first sealing member 321, the present application can form a bent and extended sealing interface between the first tubular connector 31, the body 10 and the circulation tube 20, thereby effectively improving the sealing effect.

[0059] In some embodiments, the inner circumferential wall of the first tubular connector 31 further defines a circumferentially extending receiving groove 312, and the second step portion 311 extends radially outward from the slot of the receiving groove 312 facing the inlet 111. The first sealing assembly 32 further includes a second sealing member 322, which is disposed in the receiving groove 312 and abuts against the second end surface 3212b of the ring portion 3212 and the end surface of the first nozzle 23.

[0060] The second step portion 311 may be located on a side of the receiving groove 312 facing the body 10 . That is, the second step portion 311 is closer to the body 10 than the receiving groove 312 .

[0061] The second sealing member 322 is disposed in the receiving groove 312, which means that the second sealing member 322 is at least partially located within the receiving groove 312. For example, a portion of the second sealing member 322 is located within the receiving groove 312, while another portion of the second sealing member 322 is located outside the receiving groove 312. Alternatively, the entire second sealing member 322 is located within the receiving groove 312.

[0062] The second seal 322 provided in the accommodating groove 312 is located on the side of the first seal 321 away from the main body 10, so that the first end face of the second seal 322 along its axial direction abuts against the second end face 3212b of the ring portion 3212 and the end face of the first pipe mouth 23, and the second end face of the second seal 322 along its axial direction abuts against the bottom wall of the accommodating groove 312.

[0063] The second sealing member 322 may be a sealing gasket. For example, the second sealing member 322 may be an annular sealing gasket.

[0064] The embodiment of the present application provides a receiving groove 312 and a second sealing member 322 to add multiple sealing interfaces between the first tubular connector 31 and the first sealing member 321 and between the first tubular connector 31 and the first pipe opening 23 of the circulation pipe 20, thereby further improving the sealing effect.

[0065] In some embodiments, the first sealing assembly 32 further includes a third sealing member 323 . The third sealing member 323 is disposed on the first step portion 1111 , and the end surface of the cylinder portion 3211 along its axial direction abuts against the third sealing member 323 .

[0066] The third sealing member 323 may be a sealing ring. Alternatively, the third sealing member 323 may be an annular sealing ring.

[0067] The end face of the cylindrical portion 3211 along its axial direction faces away from the ring portion 3212. The third sealing member 323 can be provided at the bottom of the first step portion 1111. The cylindrical portion 3211 of the first sealing member 321 can press the third sealing member 323 between its end face and the first step portion 1111, further increasing the sealing interface and improving the sealing effect.

[0068] The first sealing member 321, the second sealing member 322 and the third sealing member 323 are combined to form multiple sealing interfaces of different shapes and directions at different positions between the first tubular connector 31, the body 10 and the circulation tube 20, thereby effectively improving the sealing effect.

[0069] In some embodiments, the depth of the receiving groove 312 along the axial direction is smaller than the thickness of the second sealing member 322 along the axial direction.

[0070] The axial directions of the receiving groove 312 and the second sealing member 322 may be parallel to the second direction Y.

[0071] In the embodiment of the present application, the depth of the receiving groove 312 is set to be smaller than the thickness of the second sealing member 322, so that the second sealing member 322 can be partially accommodated in the receiving groove 312. After the first tubular connector 31 is connected to the body 10, the second sealing member 322 can be appropriately squeezed to cause a certain degree of deformation of the second sealing member 322, thereby improving the sealing effect.

[0072] Optionally, the depth of the accommodating groove 312 along the axial direction may be approximately 1 / 4 to 1 / 2 of the thickness of the second sealing member 322 along the axial direction.

[0073] In some embodiments, reference Figure 2 The sealing device 30 also includes a second tubular connector 33 and a second sealing assembly 34. The second tubular connector 33 is connected to the body 10 at the outlet 121. The second sealing assembly 35 contacts and seals the second tubular connector 33, the outlet 121, and the second pipe opening 24 of the circulation tube 20 adjacent to the outlet 121.

[0074] The connection method between the second tubular connector 33 and the body 10 includes, but is not limited to, threaded connection, clamping, welding, etc. For example, the interior of the second tubular connector 33 is provided with an internal thread, and the outer peripheral wall of the outlet 121 of the body 10 is provided with an external thread, and the internal thread of the second tubular connector 33 is threadedly connected to the external thread at the outlet 121.

[0075] The second tubular connector 33 can be arranged between the second tubular connector 33, the outlet 121 and the second pipe opening 24. When the second tubular connector 33 is connected to the main body 10, it can press the second sealing assembly 34 between the outlet 121 of the main body 10 and the second pipe opening 24 of the circulation tube 20, thereby achieving fluid sealing between the outlet 121 of the main body 10 and the second pipe opening 24 of the circulation tube 20.

[0076] In some embodiments, the internal channel 13 extends along the second direction Y, the second tubular connector 33 and the first tubular connector 31 are symmetrically arranged about a reference plane perpendicular to the second direction Y, and the second sealing assembly 35 and the first sealing assembly 32 are symmetrically arranged about the reference plane.

[0077] The second tubular connector 33 may have a structure symmetrical to the first tubular connector 31 , and the second sealing assembly 35 may have a structure symmetrical to the first sealing assembly 32 . Therefore, they will not be described in detail here.

[0078] In some embodiments, the receiver 14 further includes a receiving body 143 and a fixing member 144. The receiving cavity 141 is formed in the receiving body 143. The receiving body 143 is provided with a fixing hole 1431 radially extending through the peripheral wall thereof. The fixing member 144 is movably connected to the fixing hole 1431 along the radial direction of the receiving body 143 to change the length of the fixing member 144 extending into the receiving cavity 141.

[0079] The outer portion of the receiving body 143 may be roughly cylindrical or polygonal. The receiving cavity 141 may be a cylindrical cavity to facilitate the insertion of functional components.

[0080] The wall of the fixing hole 1431 may be provided with an internal thread, and the section of the fixing member 144 inserted into the fixing hole 1431 may be provided with an external thread, so that the fixing hole 1431 and the fixing member 144 are threadedly connected.

[0081] After the functional element is inserted into the receiving cavity 141, the fixing member 144 is rotated radially inward to abut against the functional element, thereby limiting and securing the functional element. When the functional element needs to be removed, the fixing member 144 is rotated radially outward to separate the fixing member 144 from the functional element, thereby releasing the functional element and smoothly removing it from the flow cell 100.

[0082] Fixing member 144 may include a first section, a second section, and a third section, which are sequentially connected. The first section has knurling on its circumferential wall to facilitate user operation and prevent slipping. The third section has external threads on its circumferential wall for threaded connection with fixing hole 1431. The second section is connected between the first and third sections, extending the axial length of fixing member 144 and facilitating user operation.

[0083] The embodiment of the present application effectively improves the convenience of disassembly and assembly of the functional element by providing the fixing member 144 and the fixing hole 1431 .

[0084] In some embodiments, the receiver 14 further includes a receiving body 143, and the receiving cavity 141 is formed in the receiving body 143. The inner peripheral wall of the receiving body 143 is provided with a limiting portion 1432 adjacent to the first opening 142. The limiting portion 1432 extends along the circumference of the inner peripheral wall of the receiving body 143 and protrudes radially inward from the inner peripheral wall of the receiving body 143 to limit the length of the functional element inserted into the receiving cavity 141.

[0085] The diameter of the restriction portion 1432 may be smaller than the diameter of the receiving cavity 141 .

[0086] The limiting portion 1432 is arranged adjacent to the first opening 142, so that the functional element can be inserted into the receiving cavity 141 more smoothly at the beginning. When the functional element is inserted into the inner end of the receiving cavity 141, the limiting portion 1432 can prevent the functional element from being further inserted to prevent the functional element from being over-inserted into the receiving cavity 141 and colliding with the circulation tube 20.

[0087] In some embodiments, the receiver 14 further includes a receiving body 143 , a receiving cavity 141 is formed in the receiving body 143 , a first opening 142 is formed at one axial end of the receiving body 143 , and a second opening 145 is provided at the other axial end of the receiving body 143 .

[0088] The inner circumferential wall of the receiving body 143 is provided with an annular groove 146 adjacent to the second opening 145. The annular groove 146 extends circumferentially along the inner circumferential wall of the receiving body 143 and is radially recessed outward from the inner circumferential wall of the receiving body 143. An annular damping portion is provided in the annular groove 146, and the inner diameter of the annular damping portion is smaller than the inner diameter of the receiving body 143.

[0089] Both ends of the receiving cavity 141 may be in communication with the first opening 142 and the second opening 145 , respectively. The functional element may be inserted into the receiving cavity 141 through the second opening 145 .

[0090] The annular groove 146 forms an accommodating space inside, which can provide a mounting portion for the annular damping portion. The annular damping portion is partially accommodated in the annular groove 146, and the other part protrudes radially inward from the receiving cavity 141.

[0091] The annular damping portion may be an annular structure made of a flexible material. For example, the annular damping portion may be a silicone O-ring or a rubber O-ring.

[0092] When the functional element is inserted into the receiving cavity 141 , the annular damping portion can produce a certain damping effect to prevent the functional element from being inserted too quickly and colliding with other structures, thereby improving the reliability and stability of the functional element connection.

[0093] According to the second aspect of the present application, an embodiment of the present application also provides a fluid monitoring device. Figure 8 FIG2 is a schematic diagram of the structure of a fluid monitoring device provided in one embodiment of the present application. Fluid monitoring device 1000 includes a functional element 200, a fluid input tube 300, a fluid output tube 400, and a flow cell 100 provided in any of the aforementioned embodiments. The fluid input tube 300 is fluidically connected to the inlet 111 of the flow cell 100, and the fluid output tube 400 is fluidically connected to the outlet 121 of the flow cell 100. The functional element 200 is connected to the flow cell 100 via the receiving cavity 141 of the flow cell 100 and is configured to emit light into the fluid flow channel within the flow cell 20 through the light-transmitting section 22 of the flow cell 20.

[0094] When light is emitted into the fluid flow channel within the flow tube 20 through the light-transmitting section 22 of the flow tube 20, the sampled fluid within the flow channel dissipates the light. The functional element 200 is further configured to receive scattered light from the sampled fluid and monitor the sampled fluid using the received scattered light.

[0095] Schematically, the functional element 200 may be a Raman probe that can emit light through a laser system or other light source capable of generating a focused light beam, and collect scattered light generated after the light irradiates the sample fluid.

[0096] One end of the fluid input tube 300 and the fluid output tube 400 can be connected to the reaction pipeline of the sampled fluid, so that the reaction progress of the sampled fluid can be monitored by the fluid monitoring device 1000. The other end of the fluid input tube 300 can be connected to the first tubular connector 31, and the other end of the fluid output tube 400 can be connected to the second tubular connector 33.

[0097] The fluid monitoring device 1000 of the embodiment of the present application circulates fluid through the circulation tube 20. The sealing device 30 can form a fluid seal between the body 10 and the circulation tube 20, effectively preventing the fluid in the circulation tube 20 from penetrating into the internal channel 13 and the receiving cavity 141 of the body 10. After the functional element 200 is connected to the circulation cell 100 through the receiving cavity 141, it is exposed to the internal channel 13 through the first opening 142. On the one hand, the light-transmitting section 22 can allow the functional element 200 to illuminate the fluid in the circulation tube 20 to achieve the fluid monitoring function. On the other hand, it also isolates the functional element 200 from the fluid in the circulation tube 20 and prevents direct contact, thereby reducing the requirements for the sealing and material of the functional element 200 and thus reducing its cost. It also facilitates the flexible disassembly and assembly between the functional element 200 and the circulation cell 100, improving the convenience of use.

[0098] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0099] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0100] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, m and / or n can represent: m exists alone, m and n exist simultaneously, and n exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0101] In the description of the embodiments of the present application, the term "plurality" refers to more than two (including two).

[0102] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "vertical", "horizontal", "top", "bottom", "inside", "outside", and "circumferential" are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the embodiments of the present application.

[0103] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0104] In the embodiments of this application, "parallel" includes not only absolute parallelism but also approximately parallelism as commonly understood in engineering practice. Similarly, "perpendicular" also includes not only absolute perpendicularity but also approximately perpendicularity as commonly understood in engineering practice. For example, if the angle between two directions is 85°-90°, they are considered perpendicular; if the angle between two directions is 0°-5°, they are considered parallel.

[0105] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present application, and such modifications or substitutions should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A flow cell, characterized in that include: a body comprising an inlet, an outlet, an internal passage, and a receiver, wherein the internal passage extends from the inlet to the outlet, the receiver comprises a receiving cavity and a first opening, the receiving cavity and the internal passage are in communication through the first opening; a flow tube disposed in the internal passage, the interior of the flow tube defining a fluid flow channel, at least a portion of the flow tube being light-transmissive to form a light-transmissive segment, the light-transmissive segment being disposed opposite the first opening, the receiver being disposed opposite the light-transmissive segment on one side of the light-transmissive segment along a first direction, the first direction intersecting an axial direction of the light-transmissive segment; as well as a sealing device configured to form a seal between the body and the flow tube to block the inflow of fluid; The flow tube extends from the inlet to the outlet and matches the shape of the internal channel; the sealing device includes a first tubular connector and a first sealing assembly, the first tubular connector is connected to the body at the inlet, and the first sealing assembly contacts and seals with the first tubular connector, the inlet, and a first pipe opening of the flow tube adjacent to the inlet; The inner circumferential wall of the inlet is provided with a first step portion, and the inner circumferential wall of the first tubular connector is provided with a second step portion; the first sealing assembly includes a first sealing member, the first sealing member having a cylindrical portion and a ring portion extending along the circumference of the cylindrical portion, the cylindrical portion being inserted between the first step portion and the first pipe opening, the inner circumferential wall of the cylindrical portion abutting against the outer pipe wall of the first pipe opening, the outer circumferential wall of the cylindrical portion abutting against the first step portion, the first end face of the ring portion along the axial direction abutting against the end face of the inlet, and the second end face of the ring portion opposite to the first end face along the axial direction abutting against the second step portion; The inner circumferential wall of the first tubular connecting piece is also provided with a circumferentially extending receiving groove, and the second step portion extends radially outward from the groove opening of the receiving groove toward the inlet; the first sealing assembly also includes a second sealing member, which is provided in the receiving groove and abuts against the second end face of the ring portion and the end face of the first pipe opening.

2. The flow cell according to claim 1, wherein The circulation cell further comprises: The reflector is arranged on the body. The receiver and the reflector are respectively arranged on two opposite sides of the light-transmitting section along a first direction, so that the reflector reflects the light emitted from the first opening and passing through the light-transmitting section.

3. The flow cell according to claim 2, wherein The body further includes a protruding portion, wherein a receiving cavity is defined in the protruding portion, the reflector is disposed in the receiving cavity, an inner end of the receiving cavity is communicated with the internal channel, and an outer end of the receiving cavity is closed by a gland; The internal channel extends along the second direction, the receiving cavity and the accommodating cavity both extend along the first direction and are respectively located on two opposite sides of the internal channel along the first direction, and the first direction and the second direction intersect.

4. The flow cell according to claim 1, wherein The first sealing assembly further includes a third sealing member, the third sealing member is provided on the first step portion, and the end surface of the cylinder portion along the axial direction abuts against the third sealing member; and / or A depth of the accommodating groove along the axial direction is smaller than a thickness of the second sealing member along the axial direction.

5. The flow cell according to claim 1, wherein The receiver also includes a receiving body and a fixing member, the receiving cavity is formed in the receiving body; the receiving body is provided with a fixing hole radially penetrating its peripheral wall, and the fixing member is movably connected to the fixing hole along the radial direction of the receiving body to change the length of the fixing member extending into the receiving cavity.

6. The flow cell according to claim 1, wherein The receiver further includes a receiving body, wherein the receiving cavity is formed within the receiving body; The inner peripheral wall of the receiving body is provided with a limiting portion adjacent to the first opening. The limiting portion extends along the circumference of the inner peripheral wall and protrudes radially inward from the inner peripheral wall of the receiving body.

7. A fluid monitoring device, characterized in that: comprising a functional element, a fluid input pipe, a fluid output pipe and a flow cell according to any one of claims 1 to 6, The fluid input tube is connected to the inlet fluid of the circulation pool, the fluid output tube is connected to the outlet fluid of the circulation pool, the functional element is connected to the circulation pool via the receiving cavity of the circulation pool, and is configured to emit light to the fluid flow channel in the circulation tube through the light-transmitting section of the circulation tube.

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