CN219996882U - A transparent reflection probe for near infrared detection - Google Patents

Abstract

The utility model relates to a transparent and reflective probe for near infrared detection, which comprises an optical fiber and a sleeve; the outer wall of the sleeve is provided with two circulation ports, the two circulation ports are oppositely arranged, a transmission block and a reflection block are arranged in the sleeve, the transmission block and the reflection block are respectively positioned at two sides of the circulation ports along the axial direction of the sleeve, the opposite surfaces of the transmission block and the reflection block are parallel and are arranged at intervals, and the opposite surfaces of the transmission block and the reflection block correspond to the circulation ports; a detection cavity is arranged in the sleeve between one side of the transmission block and the reflection block and is communicated with liquid to be detected through a circulation port; the inside of the sleeve on the other side of the transmission block is provided with a mounting cavity; one side of the installation cavity is opened and positioned at the end part of the sleeve, and the installation end of the optical fiber is detachably connected with the installation cavity, so that the optical fiber is convenient to detach and assemble, and the transflector probe which is configured with the optical fiber with poor high temperature resistance can be used for a fermentation tank requiring high temperature sterilization.

Description

A transparent reflection probe for near infrared detection

Technical Field

The utility model relates to the technical field of instruments and meters, in particular to a transparent and reflective probe for near infrared detection.

Background

The near infrared transreflective probe is used as a spectrum acquisition accessory for online detection of the fermentation process of the stainless steel large tank, and can realize real-time detection of the fermentation process after being connected with a near infrared spectrometer host. In general, a fermenter needs to be sterilized at high temperature when in use, and a transflector probe used for contacting with fermentation broth needs to be sterilized at high temperature, so that the transflector probe with high temperature resistance needs to be selected.

The high-temperature-resistant transparent and reflective probe needs to be provided with a high-temperature-resistant optical fiber, and equipment investment is increased due to high price of the high-temperature-resistant optical fiber.

Disclosure of Invention

The inventor aims at the defects in the prior art, and provides a transreflective probe for near infrared detection, so that the optical fiber is convenient to disassemble and assemble, and the transreflective probe which is provided with the optical fiber not resistant to high temperature can be used for a fermentation tank requiring high temperature sterilization.

The technical scheme adopted by the utility model is as follows:

a kind of transparent and reflective probe used for near infrared detection, including optic fibre and bush;

the outer wall of the sleeve is provided with two circulation ports which are arranged oppositely,

the inside of the sleeve is provided with a transmission block and a reflection block, the transmission block and the reflection block are respectively positioned at two sides of the circulation port along the axial direction of the sleeve, the opposite surfaces of the transmission block and the reflection block are parallel and are arranged at intervals, and the opposite surfaces of the transmission block and the reflection block correspond to the circulation port;

a detection cavity is formed in the sleeve between one side of the transmission block and the reflection block, and the detection cavity is communicated with liquid to be detected through a circulation port;

the inside of the sleeve on the other side of the transmission block is provided with a mounting cavity;

one side of the installation cavity is opened and positioned at the end part of the sleeve, and the installation end of the optical fiber is detachably connected with the installation cavity.

As a further improvement of the above technical scheme:

the outer periphery of installation end with be provided with the O type circle between the inner wall of installation cavity, be provided with a plurality of screw holes that correspond with the O type circle on the outside sleeve of installation cavity, a plurality of screw holes are followed the circumferencial direction equipartition of O type circle, and threaded hole installs the jackscrew, the jackscrew will the installation end can dismantle fixed mounting in the installation cavity.

Still include the flow cell, the structure of flow cell is:

the probe liquid tank is detachably and hermetically arranged outside the sleeve, one end of the probe liquid tank is a socket matched with the sleeve, an inlet and an outlet are oppositely arranged on the side wall of the probe liquid tank, and the inlet and the outlet correspond to the circulation port;

the inlet and the outlet are communicated with the liquid to be detected through pipelines, so that the liquid to be detected flows through the probe liquid tank.

The device further comprises a screw cap, wherein the screw cap comprises a threaded pipe, and an annular baffle is arranged at one end of the threaded pipe;

an annular boss is arranged on the periphery of the end part of the sleeve at the mounting cavity, a sealing ring mounting position is arranged on the outer wall of the sleeve between the annular boss and the circulation port, and a sealing ring is mounted at the sealing ring mounting position;

the periphery of the mounting end is matched with an inner hole of the annular baffle, the threaded pipe is in threaded connection with the outer part of the probe liquid tank at the socket, the annular baffle is matched with the annular boss in a contact manner, and the sealing ring is matched with the inner wall of the probe liquid tank in a sealing manner.

The circulation port is a long hole, two long sides of the circulation port are arranged in parallel, and an included angle between the length direction of the circulation port and the radial section of the sleeve is 30-45 degrees.

The distance between the two long sides of the circulation port is 1-5mm.

The sleeve is characterized in that: the device comprises an installation pipe detachably connected with an installation end, wherein two ends of the installation pipe are communicated, and one end of the installation pipe is detachably and hermetically connected with a detection pipe;

the structure of the detection tube is as follows: the light source comprises a tubular body, wherein two circulation ports are positioned on the side wall of the tubular body, and the transmission block and the reflection block are detachably and hermetically arranged in the tubular body;

a detection cavity is formed inside the tubular body between the transmission block and the reflection block;

the inside of the mounting tube and the inside of the tubular body at one side of the transmission block form a mounting cavity.

One end of the mounting pipe is provided with a connecting section in threaded connection with the inside of the detection pipe, and the butt joint end face of the mounting pipe and the detection pipe is provided with a sealing element.

The structure of the transmission block is as follows: the clamping ring and the first pressing block are of annular structures, and the periphery of the clamping ring is in threaded connection with the inside of the tubular body;

the tubular body on one side of the flow port is provided with a first annular step matched with the first sapphire glass, and the first sapphire glass is tightly pressed on the first annular step through a first pressing block by the clamp ring.

The structure of the reflection block is as follows: the device comprises a compression block, a second compression block and second sapphire glass, wherein the compression block, the second compression block and the second sapphire glass are sequentially arranged in the tubular body along the axial direction of the tubular body, and the periphery of the compression block is in threaded connection with the interior of the tubular body;

the tubular body on one side of the flow port is provided with a second annular step matched with the second sapphire glass, and the second sapphire glass is tightly pressed on the second annular step through a second pressing block by the pressing block.

The beneficial effects of the utility model are as follows:

the utility model has compact and reasonable structure and convenient operation, and the installation cavity is convenient for the disassembly and assembly of the optical fiber on one hand and the sterilization treatment of the part contacted with the liquid to be detected on the other hand by arranging the installation cavity and the detection cavity which are relatively independent in the sleeve, so that the transflector probe which is provided with the optical fiber which cannot resist high temperature can be used for a fermentation tank which needs high temperature sterilization.

The utility model also has the following advantages:

(1) Through setting up O type circle in the installation cavity inside to and the screw hole installation jackscrew that corresponds with O type circle, not only make the detachable mounting structure of optic fibre simple and firm, also be convenient for adopt the end cap protection simultaneously when sterilizing.

(2) The circulation cell which is in sealing fit with the outer wall of the sleeve is locked on the transflector probe through the nut which is matched with the annular boss on the transflector probe, so that the sealing installation of the circulation cell is realized with a simple structure.

(3) The sleeve is arranged into a split structure of the mounting tube and the detection tube, and the detection tube is replaced when the transparent and reflective probes with different optical paths are needed due to the fact that the width dimension of the flow hole has various specifications.

Drawings

Fig. 1 is a schematic diagram of the structure of the present utility model (including a flow cell).

Fig. 2 is an exploded view of fig. 1.

Fig. 3 is a schematic structural view (exploded view) of the present utility model.

Fig. 4 is a schematic structural view (cross-sectional view) of the present utility model.

Fig. 5 is a schematic view (exploded view) of the sleeve according to the present utility model.

Fig. 6 is a schematic structural view (exploded view, another view) of the sleeve according to the present utility model.

Fig. 7 is a schematic view (cross-sectional view) of the sleeve of the present utility model.

Fig. 8 is a schematic structural view (cross-sectional view) of the tubular body of the present utility model.

Fig. 9 is a schematic view (exploded view) of the structure of the transmissive block of the present utility model.

Fig. 10 is a schematic structural view (exploded view) of the reflection block of the present utility model.

FIG. 11 is a schematic diagram of the flow cell structure of the present utility model.

FIG. 12 is a schematic view (cross-sectional view) of the flow cell of the present utility model.

Fig. 13 is a schematic structural view of the nut of the present utility model.

Wherein:

1. an optical fiber; 11. an incident optical fiber; 12. receiving an optical fiber; 13. a mounting end;

2. a sleeve;

21. installing a pipe; 2101. an annular boss; 2102. a connection section; 2103. a threaded hole; 2104. a sealing ring installation position; 2105. a mounting cavity;

22. a detection tube; 2201. a tubular body; 21011. a first annular step; 21012. a second annular step; 2202. a flow port; 2203. a transmissive block; 22031. a first sapphire glass; 22032. a first briquette; 22033. a clamp ring; 2204. a reflection block; 22041. a second sapphire glass; 22042. a second briquetting; 22043. a compaction block;

3. a flow cell; 31. an inlet; 32. an outlet; 33. a probe liquid tank;

4. a screw cap; 41. a threaded tube; 42. an annular baffle.

Detailed Description

The following describes specific embodiments of the present utility model with reference to the drawings.

As shown in fig. 2 to 4, the transflective probe for near infrared detection of the present embodiment includes an optical fiber 1 and a sleeve 2; the optical fiber 1 includes an incident optical fiber 11 and a receiving optical fiber 12, the incident optical fiber 11 and the receiving optical fiber 12 being joined together at a mounting end 13.

The outer wall of sleeve 2 is provided with two circulation mouths 2202, and two circulation mouths 2202 set up relatively, and sleeve 2 inside is provided with transmission piece 2203 and reflector block 2204, and transmission piece 2203 and reflector block 2204 are located the both sides of circulation mouths 2202 along sleeve 2 axis direction respectively, and the opposite face of transmission piece 2203 and reflector block 2204 is parallel and the interval sets up, and the opposite face of transmission piece 2203 and reflector block 2204 corresponds with the circulation mouths 2202.

A detection cavity is formed in the sleeve 2 between one side of the transmission block 2203 and the reflection block 2204, and the detection cavity is communicated with liquid to be detected through a circulation port 2202; inside the sleeve 2 on the other side of the transmissive block 2203 is a mounting cavity 2105.

In particular, the main function of the sleeve 2 is to fix the optical fiber 1 while providing a relatively stable detection environment for the optical fiber 1; in the specific structure of the sleeve 2, the transmission block 2203 separates the detection cavity from the installation cavity 2105, so that the detection cavity is not communicated with the installation cavity 2105, the transmission block 2203 is used for transmitting light between the optical fiber 1 and the detection cavity, and the reflection block 2204 enables incident light from the optical fiber 1 to pass through the transmission block 2203 and enter the optical fiber 1 after being reflected; two oppositely disposed flow-through openings 2202 are provided for the flow of liquid to be measured between the transmissive and reflective blocks 2203, 2204, the spacing between the opposing faces of the transmissive and reflective blocks 2203, 2204 preferably being consistent with the width of the flow-through openings 2202.

There are two types of optical path transmission forms of the transflector probe:

one is the transflector: when the liquid to be detected is transparent, the incident light penetrates through the liquid after passing through the incident optical fiber 11 and the transmission block 2203, then is reflected by the reflection block 2204, and is incident into the receiving optical fiber 12 after passing through the liquid to be detected again, and then is transmitted to the near infrared host;

one is diffuse reflection: when the liquid to be detected is turbid, incident light directly enters the receiving optical fiber 12 after being diffusely reflected on the surface of the sample through the incident optical fiber 11 and the transmission block 2203, and is transmitted to the near infrared host.

In use, the mounting cavity 2105 and the optical fiber 1 are not in contact with the liquid to be detected, the exterior of the sleeve 2 and the detection cavity are in contact with the liquid to be detected.

The mounting cavity 2105 is open on one side and is located at the end of the sleeve 2, and the mounting end 13 of the optical fiber 1 is detachably connected with the mounting cavity 2105.

The transparent and reflective probe for near infrared detection of the embodiment is used for multiplexing the jack of the dissolved oxygen electrode of the fermentation tank and is used for online detection in the application process of the fermentation process of the stainless steel large tank. When needs to sterilize, dismantle the optic fibre 1 of the transmission and reflection probe, use the end cap to block up the installation cavity 2105, prevent when sterilizing wholly that there is steam to get into the installation cavity 2105, because if there is steam in the installation cavity 2105, can interfere with the accuracy of the spectrum after installing optic fibre 1, install optic fibre 1 after the sterilization is finished.

By arranging the relatively independent installation cavity 2105 and the detection cavity in the sleeve 2, the installation cavity 2105 is convenient for disassembling and assembling the optical fiber 1 on one hand, and the part which is in contact with the liquid to be detected is convenient for being sterilized independently on the other hand, so that the transflector probe provided with the optical fiber which is not resistant to high temperature can be used for a fermentation tank which needs high temperature sterilization.

Further, as shown in fig. 4 to 7, an O-ring is provided between the outer periphery of the mounting end 13 and the inner wall of the mounting cavity 2105, a plurality of threaded holes 2103 corresponding to the O-ring are provided on the sleeve 2 outside the mounting cavity 2105, the plurality of threaded holes 2103 are uniformly distributed along the circumferential direction of the O-ring, jackscrews are mounted in the threaded holes 2103, and the jackscrews detachably and fixedly mount the mounting end 13 in the mounting cavity 2105.

Specifically, the O-rings are used for installing the mounting end 13 in the mounting cavity 2105, and have a sealing function, and the number of the O-rings can be multiple; one circle of threaded holes 2103 corresponds to one O-shaped ring, so that the jackscrew is convenient to indirectly fix the mounting end 13, the fixing structure of the optical fiber 1 is more stable, and when the mounting cavity 2105 is plugged by the plug, the plug is in sealing fit with the O-shaped ring at the mounting cavity 2105, so that the sealing state of the mounting cavity 2105 can be maintained.

Through set up O type circle in installation cavity 2105 inside to and the screw hole 2103 installation jackscrew that corresponds with O type circle, not only make the detachable mounting structure of optic fibre 1 simple firm, also be convenient for adopt the end cap protection simultaneously in the time of sterilizing.

Further, as shown in fig. 3 to 8, the flow port 2202 is an elongated hole, two long sides of the flow port 2202 are arranged in parallel, and an angle a between the longitudinal direction of the flow port 2202 and the radial cross section of the sleeve 2 is 30 to 45 °. The included angle a is 30-45 degrees, so that stray light influence can be reduced, and meanwhile, the processing is convenient, and the material waste is avoided.

Further, the distance between the two long sides of the flow port 2202 is 1 to 5mm. When the samples measured by the fermenter are all aqueous solutions, the distance between the two long sides of the flow port 2202 is 1-5mm, so that the detection is convenient.

Embodiment two:

when no mounting hole is arranged on the tank body to be detected, the transflector probe is required to be matched with the flow cell for use, and the specific flow cell adaptation structure is as follows:

as shown in fig. 1 to 2 and fig. 11 to 12, the flow cell 3 to be combined with the transflective probe has the following structure:

the probe liquid tank 33 is detachably and hermetically arranged outside the sleeve 2, one end of the probe liquid tank 33 is a socket matched with the sleeve 2, an inlet 31 and an outlet 32 are oppositely arranged on the side wall of the probe liquid tank 33, and the inlet 31 and the outlet 32 correspond to the circulation port 2202; the inlet 31 and the outlet 32 are communicated with the liquid to be detected through pipelines, so that the liquid to be detected flows through the probe liquid tank 33.

Specifically, after the flow cell 3 is installed outside the sleeve 2, the inlet 31, the outlet 32 and the flow port 2202 are positioned at the same position in the axial direction of the sleeve 2, so that the flow of the liquid to be detected is facilitated, and the cross section of the probe liquid tank 33 can be round or rectangular; the material of the flow cell 3 can be 316L stainless steel, the sealing performance of the flow cell 3 is good, high-temperature sterilization can be tolerated, the liquid to be detected can be ensured to continuously flow through the probe liquid tank 33 by additionally arranging peristaltic pumps on the pipeline connected with the inlet 31 and the outlet 32, the real-time detection requirement can be realized, the on-line detection of the enzyme reaction process with low asepsis requirement in the applicable scene can be realized, and even effective on-line real-time detection can be realized in some organic chemical reaction processes; the inlet 31 and the outlet 32 can be selected and matched according to different scene requirements, and replaceable quick-screwing connectors are adopted, and the quick-screwing connectors comprise pagoda type connectors and cannulable connectors, which respectively correspond to the use of a hose and a hard tube. When high-temperature sterilization is needed, the whole high-temperature sterilization can be performed by only separating the optical fiber 1 from the sleeve 2 and plugging the plug into the sleeve 2.

After the transflective probe is inserted into the flow cell 3, the liquid to be detected enters the flow cell 3 through the pipe and fills the flow cell 3, the liquid to be detected flows through the flow port 2202 of the transflective probe, and along with the flowing of the liquid, the liquid in the flow port 2202 is continuously refreshed. When the sample is clarified, light is incident from the incident optical fiber 11, passes through the liquid of the flow port 2202, is reflected by the reflecting block 2204, and then passes through the liquid to be transmitted to the receiving optical fiber 12, so as to obtain an absorbance spectrum; when the liquid is turbid, incident light is directly diffusely reflected on the surface of the turbid sample and transmitted to the receiving optical fiber 12, and an absorbance spectrum is obtained.

Further, as shown in fig. 2, 7, and 11 to 13, the flow cell 3 has a specific mounting structure as follows:

the screw cap 4 is further included, the screw cap 4 comprises a threaded pipe 41, and one end of the threaded pipe 41 is provided with an annular baffle 42; an annular boss 2101 is arranged on the periphery of the end part of the sleeve 2 at the installation cavity 2105, a sealing ring installation position 2104 is arranged on the outer wall of the sleeve 2 between the annular boss 2101 and the circulation port 2202, and a sealing ring is installed at the sealing ring installation position 2104; the periphery of the mounting end 13 is matched with an inner hole of an annular baffle plate 42, a threaded pipe 41 is in threaded connection with the outside of the probe liquid tank 33 at the socket, the annular baffle plate 42 is in contact fit with an annular boss 2101, and a sealing ring is in sealing fit with the inner wall of the probe liquid tank 33.

Specifically, the threaded bore 2103 is located between the seal ring mounting location 2104 and the annular boss 2101; the seal ring installation site 2104 may be a seal groove for installing an O-ring.

When the flow cell 3 is installed:

firstly, a screw cap 4 is sleeved on a transparent reflection probe, the screw cap 4 is positioned at a mounting end 13 at one side of an annular boss 2101, and a sealing ring is mounted at a sealing ring mounting position 2104;

then the transflective probe is inserted into the socket of the probe liquid tank 33, the screwed pipe 41 of the screw cap 4 is screwed with the probe liquid tank 33, the flow cell 3 is fixedly connected with the transflective probe and sealed, and the liquid entering the probe liquid tank 33 can only enter and exit from the inlet 31 and the outlet 32.

The circulation cell 3 which is in sealing fit with the outer wall of the sleeve 2 is locked on the transflector probe through the screw cap 4 which is matched with the annular boss 2101 on the transflector probe, so that the sealing installation of the circulation cell 3 is realized with a simple structure.

Embodiment III:

on the basis of the first embodiment and the second embodiment, the structure of the transflective probe sleeve 2 is further optimized to be the structure:

as shown in fig. 4 to 10, the sleeve 2 has the structure: the device comprises a mounting tube 21 detachably connected with the mounting end 13, wherein two ends of the mounting tube 21 are communicated, and one end of the mounting tube 21 is detachably and hermetically connected with a detection tube 22;

the structure of the detection tube 22 is: the device comprises a tubular body 2201, two flow ports 2202 are positioned on the side wall of the tubular body 2201, and a transmission block 2203 and a reflection block 2204 are detachably and hermetically installed inside the tubular body 2201;

inside the tubular body 2201 between the transmissive and reflective blocks 2203, 2204 is a detection cavity;

the inside of the mounting tube 21 and the inside of the tubular body 2201 on the transmissive block 2203 side form a mounting cavity 2105.

The sleeve 2 is provided as a separate structure for the mounting tube 21 and the detection tube 22, and since the width dimensions of the flow hole 2202 are various, the detection tube 22 may be replaced when a transflective probe having different optical paths is required.

Further, as shown in fig. 5 to 7, one end of the mounting tube 21 is provided with a connecting section 2102 screwed with the inside of the detection tube 22, and the abutting end surfaces of the mounting tube 21 and the detection tube 22 are provided with a sealing member.

Specifically, one end of the installation tube 21 is provided with a first annular step 21011, the other end of the installation tube 21 is provided with a connecting section 2102, the outside of the installation tube 21 is provided with a threaded hole 2103 and a sealing ring installation position 2104 from the first annular step 21011 to the connecting section 2102 in sequence, and the installation cavity 2105 is positioned at the center of the installation tube 21 and is coaxial with the installation tube 21.

Further, as shown in fig. 7 to 10, the transmissive block 2203 has a structure of: the clamping ring 22033, the first pressing block 22032 and the first sapphire glass 22031 are sequentially arranged inside the tubular body 2201 along the axial direction of the tubular body 2201, the clamping ring 22033 and the first pressing block 22032 are of annular structures, and the periphery of the clamping ring 22033 is in threaded connection with the inside of the tubular body 2201;

the tubular body 2201 on the side of the flow port 2202 is provided with a first annular step 21011 which is matched with the first sapphire glass 22031, and the pressing ring 22033 presses the first sapphire glass 22031 on the first annular step 21011 through the first pressing block 22032.

Specifically, the first press block 22032 is made of a tetrafluoro material, and is used as a buffer between the clamp ring 22033 and the first sapphire glass 22031, the hole between the clamp ring 22033 and the first press block 22032 with the annular structure enables the light path to be not blocked, and the clamp ring 22033 can adopt a conventional external threaded nut. The transmissive block 2203 is configured for easy disassembly and assembly.

Further, as shown in fig. 7 to 10, the reflective block 2204 has a structure as follows: comprises a compaction block 22043, a second compaction block 22042 and second sapphire glass 22041 which are sequentially arranged in the tubular body 2201 along the axial direction of the tubular body 2201, wherein the periphery of the compaction block 22043 is in threaded connection with the interior of the tubular body 2201;

the tubular body 2201 on the side of the flow port 2202 is provided with a second annular step 21012 which is matched with the second sapphire glass 22041, and the pressing block 22043 presses the second sapphire glass 22041 on the second annular step 21012 through a second pressing block 22042.

Specifically, the second pressing block 22042 is made of a tetrafluoro material, and is used as a buffer between the pressing block 22043 and the second sapphire glass 22041, the second pressing block 22042 is made of a reflective white board, so as to reflect incident light, and the pressing block 22043 can adopt a conventional external thread plug. The reflective block 2204 is configured to facilitate disassembly and assembly.

The above description is intended to illustrate the utility model and not to limit it, the scope of which is defined by the claims, and any modifications can be made within the scope of the utility model.

Claims (10)

1. A transflector probe for near infrared detection, characterized by: comprises an optical fiber (1) and a sleeve (2);

the outer wall of the sleeve (2) is provided with two circulation ports (2202), the two circulation ports (2202) are oppositely arranged,

the inside of the sleeve (2) is provided with a transmission block (2203) and a reflection block (2204), the transmission block (2203) and the reflection block (2204) are respectively positioned at two sides of the circulation port (2202) along the axial direction of the sleeve (2), the opposite surfaces of the transmission block (2203) and the reflection block (2204) are parallel and are arranged at intervals, and the opposite surfaces of the transmission block (2203) and the reflection block (2204) correspond to the circulation port (2202);

a detection cavity is formed in the sleeve (2) between one side of the transmission block (2203) and the reflection block (2204), and the detection cavity is communicated with liquid to be detected through a circulation port (2202);

a mounting cavity (2105) is arranged in the sleeve (2) at the other side of the transmission block (2203);

one side of the installation cavity (2105) is opened and is positioned at the end part of the sleeve (2), and the installation end (13) of the optical fiber (1) is detachably connected with the installation cavity (2105).

2. A transreflective probe for near infrared detection as claimed in claim 1, wherein: the novel anti-theft device is characterized in that an O-shaped ring is arranged between the periphery of the mounting end (13) and the inner wall of the mounting cavity (2105), a plurality of threaded holes (2103) corresponding to the O-shaped ring are formed in the sleeve (2) outside the mounting cavity (2105), the threaded holes (2103) are uniformly distributed along the circumferential direction of the O-shaped ring, jackscrews are arranged in the threaded holes (2103), and the jackscrews are detachably and fixedly arranged in the mounting cavity (2105) at the mounting end (13).

3. A transreflective probe for near infrared detection as claimed in claim 1, wherein: still include flow cell (3), the structure of flow cell (3) is:

the probe liquid tank (33) is detachably and hermetically arranged outside the sleeve (2), one end of the probe liquid tank (33) is a socket matched with the sleeve (2), an inlet (31) and an outlet (32) are oppositely arranged on the side wall of the probe liquid tank (33), and the inlet (31) and the outlet (32) correspond to the circulation port (2202);

the inlet (31) and the outlet (32) are communicated with the liquid to be detected through pipelines, so that the liquid to be detected flows through the probe liquid tank (33).

4. A transreflective probe for near infrared detection as claimed in claim 3, wherein: the novel screw cap comprises a screw cap body, and is characterized by further comprising a screw cap (4), wherein the screw cap body (4) comprises a threaded pipe (41), and an annular baffle plate (42) is arranged at one end of the threaded pipe (41);

an annular boss (2101) is arranged at the periphery of the end part of the sleeve (2) at the installation cavity (2105), a sealing ring installation position (2104) is arranged on the outer wall of the sleeve (2) between the annular boss (2101) and the circulation port (2202), and a sealing ring is installed at the sealing ring installation position (2104);

the periphery of the mounting end (13) is matched with an inner hole of the annular baffle plate (42), the threaded pipe (41) is in threaded connection with the outside of the probe liquid tank (33) at the socket, the annular baffle plate (42) is in contact fit with the annular boss (2101), and the sealing ring is in sealing fit with the inner wall of the probe liquid tank (33).

5. A transreflective probe for near infrared detection as claimed in claim 1, wherein: the circulation port (2202) is an elongated hole, two long sides of the circulation port (2202) are arranged in parallel, and an included angle (a) between the length direction of the circulation port (2202) and the radial section of the sleeve (2) is 30-45 degrees.

6. A transflector probe for near infrared detection as recited in claim 5, wherein: the distance between the two long sides of the circulation port (2202) is 1-5mm.

7. A transflector probe for near infrared detection according to any one of claims 1-6, characterized in that:

the sleeve (2) has the structure that: the device comprises an installation pipe (21) detachably connected with an installation end (13), wherein two ends of the installation pipe (21) are communicated, and one end of the installation pipe (21) is detachably and hermetically connected with a detection pipe (22);

the structure of the detection tube (22) is as follows: comprises a tubular body (2201), two flow ports (2202) are positioned on the side wall of the tubular body (2201), and the transmission block (2203) and the reflection block (2204) are detachably and hermetically arranged inside the tubular body (2201);

a detection cavity is formed inside the tubular body (2201) between the transmission block (2203) and the reflection block (2204);

a mounting cavity (2105) is formed inside the mounting tube (21) and inside the tubular body (2201) on the side of the transmission block (2203).

8. A transflector probe for near infrared detection as recited in claim 7, wherein: one end of the installation tube (21) is provided with a connecting section (2102) which is in threaded connection with the inside of the detection tube (22), and the butt joint end face of the installation tube (21) and the detection tube (22) is provided with a sealing piece.

9. A transflector probe for near infrared detection as recited in claim 7, wherein: the structure of the transmission block (2203) is as follows: the novel plastic compression device comprises a compression ring (22033), a first pressing block (22032) and first sapphire glass (22031) which are sequentially arranged inside a tubular body (2201) along the axial direction of the tubular body (2201), wherein the compression ring (22033) and the first pressing block (22032) are of annular structures, and the periphery of the compression ring (22033) is in threaded connection with the inside of the tubular body (2201);

the tubular body (2201) on one side of the flow port (2202) is provided with a first annular step (21011) matched with the first sapphire glass (22031), and the pressing ring (22033) presses the first sapphire glass (22031) on the first annular step (21011) through a first pressing block (22032).

10. A transflector probe for near infrared detection as recited in claim 7, wherein: the structure of the reflection block (2204) is as follows: the novel plastic pipe comprises a compaction block (22043), a second pressing block (22042) and second sapphire glass (22041) which are sequentially arranged inside a tubular body (2201) along the axial direction of the tubular body (2201), wherein the periphery of the compaction block (22043) is in threaded connection with the inside of the tubular body (2201);

the tubular body (2201) on one side of the flow port (2202) is provided with a second annular step (21012) matched with the second sapphire glass (22041), and the second sapphire glass (22041) is pressed on the second annular step (21012) by the pressing block (22043) through a second pressing block (22042).