Flow cell and fluid monitoring equipment

Abstract

The invention discloses a flow cell and fluid monitoring equipment. The flow cell includes: a body including an inlet, an outlet, an internal channel extending from the inlet to the outlet, and a receiver including a receiving cavity and a first opening through which the receiving cavity and the internal channel communicate; the circulating pipe is arranged in the internal channel, a fluid flowing channel is defined in the circulating pipe, at least part of the section of the circulating pipe is arranged in a light-transmitting mode to form a light-transmitting section, and the light-transmitting section is arranged opposite to the first opening; and the sealing device is configured to form a seal between the body and the runner pipe so as to prevent the fluid from flowing in. According to the flow cell disclosed by the invention, the functional element can be isolated from the fluid in the flow tube and is not in direct contact with the fluid, so that the requirements on sealing, materials and the like of the functional element are reduced, the cost of the functional element is further reduced, flexible disassembly and assembly between the functional element and the flow cell are also facilitated, and the use convenience is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of fluid monitoring, 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 Raman effect and fluorescence has become an important tool for online monitoring in hazardous chemical, pharmaceutical and other industries. In such applications, the circulation cell is usually connected to the reaction pipeline, and the reaction process is monitored by a Raman probe. At present, most of the 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 on sealing and materials, resulting in a high overall cost and the probe is not easy to disassemble. 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 the cost thereof 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 protruding portion, a accommodating cavity is defined in the protruding portion, 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, 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 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 is in contact and seal with the first tubular connector, the inlet, and the first pipe opening of the flow 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 member, the first sealing member has a barrel portion and a ring portion extending circumferentially along the barrel portion, the barrel portion is inserted between the first step portion and the first pipe mouth, the inner circumferential wall of the barrel portion abuts against the outer pipe wall of the first pipe mouth, the outer circumferential wall of the barrel 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 arranged 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 smaller than the axial thickness of the second seal.

[0011] Optionally, the receiver also includes a receiving body and a fixing member, a 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 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 circumferential direction 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 flow cell provided in the embodiment of the present application includes a body, a flow tube and a sealing device. A fluid flow channel is defined in the flow tube to allow the fluid to flow in the flow tube. The body includes an internal channel extending from its inlet to its outlet, and the flow 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 flow tube has a light-transmitting section, which is arranged opposite to the first opening, so that the light emitted by the functional element can be irradiated to the light-transmitting section through the first opening, and then penetrate the light-transmitting section into the interior of the flow tube to irradiate the fluid, so as to facilitate the purpose of monitoring the fluid. The flow cell provided in the embodiment of the present application, the fluid flows in the flow tube, and the sealing device can form a fluid seal between the body and the flow tube, effectively preventing the fluid in the flow 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, the functional element is isolated from the fluid in the circulation tube and has no direct contact with it, which reduces the requirements for the sealing and material of the functional element and thus reduces its cost. It also facilitates the flexible disassembly and assembly between the functional element and the circulation pool, thereby improving the convenience 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 drawings required for use in the embodiments of the present application will be briefly introduced below. 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 It 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 body of the circulation pool 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 schematic 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 only 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 article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including 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 in conjunction with the accompanying drawings.

[0027] Figure 1 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 main 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 main body of the flow cell is shown. Figures 1 to 4 The body 10 includes an inlet 111, an outlet 121, an internal channel 13 and a receiver 14. The internal channel 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 channel 13 are connected through the first opening 142. The flow tube 20 is disposed in the internal channel 13. The flow tube 20 defines a fluid flow channel 21 inside. At least a portion of the flow tube 20 is light-transmissive to form a light-transmissive section 22. The light-transmissive section 22 is disposed opposite to 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 can 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 protrusion 11 and a second protrusion 12. The first protrusion 11 and the second protrusion 12 are connected, and a hollow channel is formed inside the first protrusion 11 and the second protrusion 12, and the hollow channels of the first protrusion 11 and the second protrusion 12 are connected to form an internal channel 13. The inlet 111 may be formed at a port of the first protrusion 11 away from the second protrusion 12, and the outlet 121 may be formed at a port of the second protrusion 12 away from the first protrusion 11.

[0031] The internal channel 13 may extend straight along a preset direction, 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 passage 13, the middle section being between the inlet 111 and the outlet 121. Alternatively, the receiving cavity 141 may be in communication with the inner passage 13 at the exact center position along the axial direction thereof.

[0033] There is an interface between the flow tube 20 and the body 10 , and 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 may be a partial section of the flow tube 20. For example, the light-transmitting section 22 may be a middle section of the flow tube 20. The first opening 142 is arranged opposite to the light-transmitting section 22. The light-transmitting section 22 may also be the entire section of the flow tube 20, that is, the flow tube 20 is arranged to be light-transmitting as a whole, and the first opening 142 may be opposite to any position of the flow tube 20. For example, the flow tube 20 may be a transparent tube as a whole.

[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 the 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 the 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 arranged in the internal channel 13 of the body 10. The body 10 also includes a receiver 14, and the receiver 14 includes a receiving cavity 141 and a first opening 142, and 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, so as to connect 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, so that 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 to enter the interior of the flow tube 20 to irradiate the fluid, so as to facilitate the purpose of monitoring the fluid.

[0037] In the flow cell 100 provided in the embodiment of the present application, the fluid flows in the flow tube 20, and the sealing device 30 can form a fluid seal between the main body 10 and the flow tube 20, effectively preventing the fluid in the flow 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 flow 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 to illuminate the fluid in the flow tube 20 to achieve the fluid monitoring function. On the other hand, the functional element is isolated from the fluid in the flow tube 20 and does not directly contact, which reduces the requirements for the sealing and material of the functional element and thus reduces its cost. It also facilitates the flexible disassembly and assembly between the functional element and the flow cell 100, thereby improving the convenience of use.

[0038] Figure 5 yes Figure 1 The schematic diagram of the side view of the circulation pool shown in FIG. Figure 6 yes Figure 5Schematic diagram of the 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, and the receiver 14 and the reflector 40 are respectively disposed on opposite sides of the light-transmitting section 22 along the first direction X, so that the reflector 40 reflects the light emitted from the first opening 142 and passing through the light-transmitting section 22, and the first direction X intersects with the axial direction of the light-transmitting section 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 at a right angle, or may intersect the axial direction of the light-transmitting segment 22 at an 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 the light emitted by the functional element connected to the receiver 14 to enter the interior of the light-transmitting segment 22 and allow the 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 arranged 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 in the light-transmitting section 22, thereby enhancing the intensity of the optical signal that can be received by the functional element, thereby improving the fluid monitoring effect.

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

[0044] The pressure cap 50 is detachably connected to the protruding portion 15, so as to facilitate the compression of the reflector 40 and facilitate the removal and replacement of the reflector 40. The connection between the pressure cap 50 and the protruding portion 15 includes, but is not limited to, threaded connection, clamping, etc. Exemplarily, the outside of the pressure cap 50 may be provided with an external thread, the cavity wall of the accommodating cavity 151 may be provided with an internal thread, and the end surface of the pressure cap 50 may be provided with a groove of a straight line, a cross, or other shapes, so that the pressure cap 50 can be screwed 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, so as to facilitate 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, whereby the flow tube 20 may be a tube body extending straight from the inlet 111 to the outlet 121, which facilitates the processing and assembly of the flow tube 20, and the integrated flow tube 20 does not need to consider sealing.

[0048] Both the receiving cavity 141 and the accommodating cavity 151 may be channels extending straightly 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 is in contact and seal with 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. Exemplarily, the interior of the first tubular connector 31 is provided with an internal thread, 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 with 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 realizing 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 A 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 portion 1111, and the inner circumferential wall of the first tubular connector 31 is provided with a second step portion 311. The first sealing assembly 32 includes a first sealing member 321, and the first sealing member 321 has a barrel portion 3211 and a ring portion 3212 extending along the circumference of the barrel portion 3211. The barrel portion 3211 is inserted between the first step portion 1111 and the first pipe opening 23, the inner circumferential wall of the barrel portion 3211 abuts against the outer pipe wall of the first pipe opening 23, the outer circumferential wall of the barrel portion 3211 abuts against the first step portion 1111, the first end face 3212a of the ring portion 3212 along the axial direction thereof abuts against the end face of the inlet 111, and the second end face 3212b of the ring portion 3212 along the axial direction thereof opposite to the first end face 3212a abuts against the second step portion 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 flow tube 20, and the cylindrical portion 3211 of the first sealing member 321 is inserted into the gap.

[0056] Optionally, the cylinder 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] The present application forms a bent and extended sealing interface between the first tubular connector 31 , the body 10 and the flow tube 20 by providing the first step portion 1111 , the second step portion 311 and the first sealing member 321 , thereby effectively improving the sealing effect.

[0059] In some embodiments, the inner circumferential wall of the first tubular connector 31 is further provided with a circumferentially extending receiving groove 312, and the second step portion 311 radially extends outward from the groove of the receiving groove 312 facing the inlet 111. The first sealing assembly 32 further includes a second sealing member 322, which is provided 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 pipe opening 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 seal 322 is disposed in the receiving groove 312, which means that the second seal 322 is at least partially located in the receiving groove 312. For example, a portion of the second seal 322 is located in the receiving groove 312, and another portion of the second seal 322 is located outside the receiving groove 312. Alternatively, the second seal 322 is entirely located in the receiving groove 312.

[0062] The second seal 322 provided in the receiving 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 receiving 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 seal 322 , so as to add a plurality of sealing interfaces between the first tubular connector 31 and the first seal 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 an 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. Optionally, the third sealing member 323 may be an annular sealing ring.

[0067] The end surface of the cylinder 3211 along its axial direction is away from the ring 3212. The third seal 323 can be arranged at the bottom of the first step 1111, and the cylinder 3211 of the first seal 321 can press the third seal 323 between its end surface and the first step 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 a plurality of 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 less 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 received in the receiving groove 312. After the first tubular connector 31 is connected to the body 10, the second sealing member 322 can be properly squeezed to deform the second sealing member 322 to achieve a better sealing effect.

[0072] Optionally, the depth of the receiving 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 is in contact and sealed with the second tubular connector 33, the outlet 121, and the second pipe opening 24 of the flow pipe 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. Exemplarily, the interior of the second tubular connector 33 is provided with an internal thread, 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 and the external thread at the outlet 121 are threadedly connected.

[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 component 35 may have a structure symmetrical to the first sealing component 32 , and 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, and the receiving cavity 141 is formed in the receiving body 143. The receiving body 143 is provided with a fixing hole 1431 radially penetrating its peripheral wall, and 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 outside of the receiving body 143 may be roughly cylindrical or polygonal. The receiving cavity 141 may be a cylindrical cavity to facilitate plugging in functional elements.

[0080] The hole 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, and 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 so that the fixing member 144 abuts against the functional element, thereby limiting and fixing the functional element. When the functional element needs to be removed, the fixing member 144 is rotated radially outward so that the fixing member 144 is separated from the functional element, thereby releasing the functional element, and the functional element can be smoothly removed from the circulation cell 100.

[0082] The fixing member 144 may include a first section, a second section, and a third section connected in sequence. The peripheral wall of the first section is provided with knurling to facilitate user operation and prevent slipping. The peripheral wall of the third section is provided with external threads for threaded connection with the fixing hole 1431. The second section is connected between the first section and the third section, which can extend the axial length of the fixing member 144 and facilitate 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, and 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 restricting portion 1432 may be smaller than the diameter of the receiving cavity 141 .

[0086] The limiting portion 1432 is disposed adjacent to the first opening 142 , so that the functional element can be inserted smoothly into the receiving cavity 141 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, thereby preventing the functional element from being over-inserted into the receiving cavity 141 and colliding with the flow 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 communicated 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 accommodation 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 inwardly from the receiving cavity 141.

[0091] The annular damping part may be an annular structure made of a flexible material. For example, the annular damping part 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 connection of the functional element.

[0093] According to the second aspect of the present application, an embodiment of the present application also provides a fluid monitoring device. Figure 8 1 is a schematic diagram of the structure of a fluid monitoring device provided by an embodiment of the present application. The 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 by any of the above embodiments. The fluid input tube 300 is fluidically connected to the inlet 111 of the flow cell 100, 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 to the fluid flow channel in the flow tube 20 through the light-transmitting section 22 of the flow tube 20.

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

[0095] Schematically, the functional element 200 may be a Raman probe, which can emit light through a laser system or other light sources 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 as to monitor the reaction process of the sampled fluid through 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 the fluid through the circulation tube 20, and 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 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 200 to illuminate the fluid in the circulation tube 20 to achieve the fluid monitoring function. On the other hand, the functional element 200 is isolated from the fluid in the circulation tube 20 and does not directly contact, which reduces the requirements on the sealing and material of the functional element 200 and thus reduces its cost. It also facilitates the flexible disassembly and assembly between the functional element 200 and the circulation pool 100, thereby improving the convenience of use.

[0098] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0099] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood 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 the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that there may be three relationships. For example, m and / or n can represent: m exists alone, m and n exist at the same time, and n exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after 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 referred device or element 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 clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0104] In the embodiments of the present application, "parallel" includes not only the absolutely parallel situation, but also the roughly parallel situation conventionally recognized in engineering; at the same time, "perpendicular" also includes not only the absolutely perpendicular situation, but also the roughly perpendicular situation conventionally recognized in engineering. For example, if the angle between two directions is 85°-90°, the two directions can be considered perpendicular; if the angle between two directions is 0°-5°, the two directions can be considered parallel.

[0105] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A circulation pool, 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, and the receiving cavity and the internal passage are connected through the first opening; A flow tube is disposed in the internal passage, wherein a fluid flow passage is defined inside the flow tube, and at least a portion of the flow tube is light-transmissive to form a light-transmissive section, and the light-transmissive section is disposed opposite to the first opening; as well as The sealing device is configured to form a seal between the body and the flow tube to block the inflow of fluid.

2. The flow cell according to claim 1, characterized in that The circulation pool also includes: A reflector is arranged on the body, and 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, and the first direction intersects with the axial direction of the light-transmitting section.

3. The flow cell according to claim 2, characterized in that The body further comprises a protruding portion, wherein a receiving cavity is defined in the protruding portion, the reflecting mirror is arranged in the receiving cavity, the inner end of the receiving cavity is communicated with the internal channel, and the 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, characterized in that The flow tube extends from the inlet to the outlet and matches the shape of the internal channel; The sealing device comprises a first tubular connector and a first sealing assembly. The first tubular connector is connected to the body at the inlet. The first sealing assembly contacts and seals with the first tubular connector, the inlet, and a first pipe opening of the flow pipe adjacent to the inlet.

5. The flow cell according to claim 4, characterized in that The inner peripheral wall of the inlet is provided with a first step portion, and the inner peripheral wall of the first tubular connecting piece is provided with a second step portion; The first sealing assembly includes a first sealing member, which has a cylinder portion and a ring portion extending along the circumference of the cylinder portion, the cylinder portion is inserted between the first step portion and the first pipe opening, the inner circumferential wall of the cylinder portion abuts against the outer pipe wall of the first pipe opening, the outer circumferential wall of the cylinder 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.

6. The flow cell according to claim 5, characterized in that The inner peripheral wall of the first tubular connecting member is further provided with a circumferentially extending receiving groove, and the second step portion radially extends outward from the notch of the receiving groove toward the inlet; The first sealing assembly further includes a second sealing member, which is disposed in the accommodating groove and abuts against the second end surface of the ring portion and the end surface of the first pipe opening.

7. The flow cell according to claim 6, characterized in that The first sealing assembly further includes a third sealing member, the third sealing member is disposed on the first step portion, and the end surface of the cylinder along the axial direction thereof abuts against the third sealing member; and / or The depth of the accommodating groove along the axial direction is smaller than the thickness of the second sealing member along the axial direction.

8. The flow cell according to claim 1, characterized in that The receiver also includes a receiving body and a fixing member, wherein 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 thereof extending into the receiving cavity.

9. The flow cell according to claim 1, characterized in that The receiver further comprises 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, and 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.

10. A fluid monitoring device, characterized in that: comprising a functional element, a fluid input pipe, a fluid output pipe and a circulation cell according to any one of claims 1 to 9, 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 chamber 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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