Method and device for detecting laundry detergent concentration

Abstract

The present invention relates to the technical field of laundry detergent detection. The purpose is to provide a method and device for detecting the concentration of laundry detergent, which method includes the following steps: S1, online sample collection; S2, sample preparation; S3, infrared absorbance detection; S4, concentration calculation; S5, repeating all the above steps until all laundry detergent samples are tested. The device includes a detection box, which is composed of a base frame and a light shield arranged on the base frame; the sample loading bucket is installed on the base frame to form a rotational fit with the base frame, and the detection box is also provided with a carrier drive mechanism for driving the sample loading bucket to rotate. The method of the present invention can greatly improve the detection efficiency, quickly screen a large number of samples, promptly detect unqualified products, and prevent inferior products from entering the market. The device is compatible with the method, and uses centrifugal force to achieve rapid preparation of laundry detergent samples, and can peel off bubbles in the laundry detergent samples while centrifugally rotating, further improving the accuracy of the detection.

Description

Technical Field

[0001] The present invention relates to the technical field of laundry detergent detection, and in particular to a laundry detergent concentration detection method and device. Background Art

[0002] The content of surfactants (such as AES fatty alcohol polyoxyethylene ether sodium sulfate and AEO fatty alcohol polyoxyethylene ether) is a core indicator for measuring the cleaning efficacy of laundry detergents. Its concentration is directly related to the effectiveness of the laundry detergent. Insufficient levels result in weak cleaning power, while excessive levels can cause residue, irritate the skin, and pollute the environment. Testing for surfactants ensures product compliance with standards and quality requirements, guaranteeing consumer safety and user experience. For laundry detergent manufacturers, sampling and testing of each product is necessary to ensure that their products meet the needs of downstream partners and customers. For large-scale manufacturers, as the number of orders increases, even sampling testing can lead to a significant testing workload.

[0003] Traditional testing methods rely on manual sampling and refractometers to measure the surfactant concentration of products. This approach is cumbersome and labor-intensive, while also offering low accuracy and increasingly failing to meet practical testing needs. While some methods (such as liquid chromatography and gas chromatography) can accurately measure surfactant concentrations, these often involve complex sample preparation, resulting in low efficiency and extremely expensive equipment. This makes them difficult to fully utilize outside of specialized testing institutions and laboratories. Summary of the Invention

[0004] The object of the present invention is to provide a method for detecting the concentration of laundry detergent, which can reduce detection time and manpower costs and improve detection efficiency.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a method for detecting the concentration of laundry detergent, comprising the following steps:

[0006] S1. Online sample collection: online extraction of laundry detergent from the packaging container onto a sample carrier with a rotating function and a transparent detection area;

[0007] S2. Sample preparation: The sample carrier is rotated to evenly disperse the laundry detergent sample on the sample carrier to the detection area of ​​the sample carrier using centrifugal force;

[0008] S3. Infrared absorbance detection: The laundry detergent sample in the detection area is detected using infrared spectroscopy to obtain the infrared absorbance of the laundry detergent sample;

[0009] S4. Concentration calculation: Compare the detected infrared absorbance of the laundry detergent sample with the standard absorbance curve to obtain the surfactant concentration of the laundry detergent sample;

[0010] S5. Repeat the above steps S1-S4 until all laundry detergent samples are tested.

[0011] Preferably, between steps S4 and S5, the method further includes the step of sample emptying: the laundry liquid sample is separated from the detection area of ​​the sample carrier by rotating the sample carrier and utilizing centrifugal force.

[0012] Preferably, after the sample emptying step, the step of carrier cleaning is also included: a cleaning liquid is introduced into the sample carrier, and the cleaning liquid is dispersed to the detection area of ​​the sample carrier by the rotation of the sample carrier using centrifugal force, and the laundry detergent sample remaining in the detection area is rinsed; after the rinsing is completed, the cleaning liquid is separated from the detection area of ​​the sample carrier using centrifugal force.

[0013] Preferably, a detection device using the above detection method comprises a detection box and a sampling and flushing mechanism, wherein the sampling and flushing mechanism can extract the laundry liquid sample in the packaging container into the sample loading hopper in the detection box and can pass a cleaning liquid into the sample loading hopper;

[0014] The detection box is composed of a base frame and a light shield arranged on the base frame; the sample hopper is installed on the base frame to form a rotational cooperation with the base frame, and a carrier driving mechanism for driving the sample hopper to rotate is also provided in the detection box; the sample hopper is composed of two layers of inner and outer plates, and a cylindrical drainage area, a conical detection area and a hollow disc-shaped feeding area are formed in the upper, middle and lower sections respectively, and the plates corresponding to the detection areas are made of translucent glass; infrared absorbance detection mechanisms are also provided in the detection boxes on both sides of the detection area.

[0015] Preferably, a support tube is provided on the top surface of the base frame, and the inner cavity of the support tube constitutes a channel for the operation of the sampling and flushing mechanism; a connecting neck is provided at the bottom of the sample loading hopper, and the connecting neck is mounted on the supporting tray in the middle section of the support tube through a tapered bearing and forms a rotational fit with the support tube;

[0016] The carrier driving mechanism includes a gear ring arranged on the outer peripheral surface of the connecting neck, and a rotating motor installed on the chassis. The output end of the rotating motor is provided with a driving gear, and the driving gear is meshed with the gear ring.

[0017] Preferably, the infrared absorbance detection mechanism includes an infrared sensor and an infrared light source, the infrared sensor is arranged on the outside of the detection area through a mounting bracket, and the infrared light source is arranged on the inner surface of the top plate of the light shield; it also includes a light homogenizing plate, which covers the outside of the light-transmitting glass on the inner side of the detection area.

[0018] Preferably, the sampling and flushing mechanism includes a top frame arranged above the detection box, a vertical screw rod and a guide rod are arranged side by side between the top frame and the top of the detection box, and the screw rod is driven by a lifting motor arranged on the top frame; a lifting frame is provided on the outer shell of the screw rod and the guide rod, and the lifting frame forms a threaded fit and a sliding fit with the screw rod and the guide rod respectively;

[0019] A sampling tube is provided at the bottom of the lifting frame, the lower end of which extends into the detection box and is passed through the support tube; a solid section is provided at the lower end of the sampling tube, and the tube opening at the lower end of the sampling tube is located on the side above the solid section; a suction and discharge drive assembly is also provided at the upper end of the sampling tube for sucking and discharging the laundry liquid sample by changing the pressure in the sampling tube;

[0020] A cleaning tube is also provided on the outer side of the upper section of the sampling tube, and the pipe opening at the lower end of the cleaning tube is also located on the side of the cleaning tube; a connecting sleeve is provided on the outer side of the upper end of the cleaning tube, and is connected to the liquid inlet pipe for supplying cleaning liquid through the connecting sleeve.

[0021] Preferably, the suction and discharge drive assembly is an electric sampling piston disposed on a lifting frame and connected to a sampling tube.

[0022] Preferably, an extension sleeve for being mounted on the outside of the cleaning pipe is provided on the inner plate corresponding to the feeding area of ​​the sample loading hopper, and an inner lining bearing is provided inside the extension sleeve.

[0023] Preferably, a liquid collecting trough is provided on the inner surface of the side wall of the light shield, and the position of the liquid collecting trough is opposite to the drainage area of ​​the sample loading hopper, and the liquid collecting trough is connected to the waste liquid tank through a pipeline and a drainage pump; a drainage hole connected to the liquid collecting trough is provided on the outer plate of the drainage area; a sealing ring is also inserted in the drainage area of ​​the sample loading hopper, and a permanent magnetic ring is provided on the top of the sealing ring, and an electromagnetic ring is provided on the inner surface of the top plate of the light shield; the permanent magnetic ring can drive the sealing ring to move up and down under the drive of the electromagnetic ring, thereby opening and closing the drainage hole.

[0024] Preferably, the sealing ring is further provided with a limiting member for preventing the sealing ring from escaping from the drainage area.

[0025] The beneficial effects of the present invention are concentrated in:

[0026] 1. It can realize online automatic extraction of laundry detergent samples, which is especially suitable for large-scale testing on the production line.

[0027] 2. The concentration of surfactants in laundry detergent samples is detected by infrared spectroscopy, which greatly improves the detection accuracy while ensuring the detection efficiency.

[0028] 3. By rotating the sample carrier, centrifugal force is used to quickly prepare laundry detergent samples. During the centrifugal rotation, bubbles in the laundry detergent samples can be stripped off, further improving the accuracy of the test.

[0029] The present invention can greatly improve detection efficiency, quickly screen a large number of samples, promptly detect unqualified products, and prevent inferior products from entering the market; it can also reduce detection costs, reduce manpower and time consumption, adapt to the needs of large-scale production and market supervision, and provide strong support for corporate production control and market quality supervision, ensuring the stability of laundry detergent products in terms of quality and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A flowchart of each step of the present invention;

[0031] Figure 2 Schematic diagram of the application of the detection device of the present invention;

[0032] Figure 3 Schematic diagram of the structure of the detection device of the present invention;

[0033] Figure 4 for Figure 3 Enlarged view of part A in the middle;

[0034] Figure 5 It is a structural diagram of the sampling tube and the cleaning tube;

[0035] 0. Packaging container; 1. Test box; 2. Sampling and flushing mechanism; 3. Sample loading hopper; 4. Base frame; 5. Light shield; 6. Plate; 7. Drainage area; 8. Test area; 9. Feeding area; 10. Translucent glass; 11. Support tube; 12. Connecting neck; 13. Tapered bearing; 14. Support tray; 15. Ring gear; 16. Rotating motor; 17. Drive gear; 18. Infrared sensor; 19. Infrared light source; 20. Mounting bracket; 21. Light homogenization Plate; 22. Top frame; 23. Screw rod; 24. Guide rod; 25. Lifting motor; 26. Lifting frame; 27. Sampling tube; 28. Solid section; 29. ​​Cleaning tube; 30. Connecting sleeve; 31. Liquid inlet pipe; 32. Electric sampling piston; 33. Extension sleeve; 34. Lined bearing; 35. Liquid collecting tank; 36. Pipeline; 37. Liquid discharge pump; 38. Waste liquid tank; 39. Liquid discharge hole; 40. Sealing ring; 41. Permanent magnet ring; 42. Electromagnetic ring. DETAILED DESCRIPTION

[0036] like Figure 1As shown in the , the present invention discloses a method for detecting the concentration of laundry detergent, which can greatly improve the detection efficiency, quickly screen a large number of samples, promptly detect unqualified products, and prevent inferior products from entering the market; it can also reduce detection costs, reduce manpower and time consumption, adapt to the needs of large-scale production and market supervision, provide strong support for enterprise production control and market quality supervision, and ensure the stability of laundry detergent products in quality and safety.

[0037] The detection method generally comprises the following steps:

[0038] S1. Sample collection online: The laundry liquid in the packaging container 0 is extracted online (conveyor line) onto a sample carrier with a rotating function and a transparent detection area 8. The detection area 8 is a narrow space with a conical cylinder shape. The sample carrier structure can be as follows: Figure 3 and 4 The sample loading hopper 3 shown in the figure can, of course, also be other structures with the same function.

[0039] S2. Sample Preparation: The sample carrier rotates, utilizing centrifugal force to evenly disperse the laundry detergent sample onto detection zone 8. Centrifugal force forces the sample into detection zone 8, where it is compressed. Simultaneously, the centrifugal force layers the sample, filling detection zone 8 with the sample. Bubbles within the sample migrate inward, simultaneously separating the bubbles.

[0040] S3. Infrared absorbance detection: The laundry detergent sample in the detection area 8 is detected using infrared spectroscopy to obtain the infrared absorbance of the laundry detergent sample.

[0041] S4. Concentration Calculation: Compare the infrared absorbance of the laundry detergent sample to the standard absorbance curve to determine the surfactant concentration of the laundry detergent sample. The standard absorbance curve can be obtained by pre-configuring standard solutions of known concentrations and plotting the infrared absorbance spectra of each standard solution.

[0042] After a sample test is completed, the tested laundry detergent sample should be separated and discharged from the sample carrier in a timely manner. After a sample test is completed, it is best to have the following steps:

[0043] Sample emptying: By rotating the sample carrier, the laundry liquid sample is separated from the detection area 8 of the sample carrier using centrifugal force.

[0044] Carrier Cleaning: Cleaning fluid is introduced into the sample carrier. As the sample carrier rotates, centrifugal force disperses the cleaning fluid into the detection zone 8 of the sample carrier, flushing any remaining laundry detergent sample from the detection zone 8. After rinsing, centrifugal force separates the cleaning fluid from the detection zone 8 of the sample carrier.

[0045] S5. Repeat all the above steps until all laundry detergent samples are tested.

[0046] The overall flow chart is as follows Figure 1 shown.

[0047] Through the above method, the present invention can realize the online automatic extraction of laundry detergent samples, which is particularly suitable for application in large-scale testing on the production line. At the same time, the concentration of surfactants in the laundry detergent samples is detected by infrared spectroscopy, which greatly improves the detection accuracy while ensuring the detection efficiency. In addition, through the rotation of the sample carrier, the centrifugal force is used to achieve rapid preparation of laundry detergent samples, and the bubbles in the laundry detergent samples can be peeled off while the centrifugal rotation is taking place, further improving the accuracy of the detection. In addition, the present invention also utilizes a sample carrier with a rotation function, and uses centrifugal force to assist the discharge of the tested sample and the discharge of the cleaning liquid, so that the sample carrier simultaneously has the characteristics of: preparation, sample cleaning, and automatic flushing.

[0048] In order to adapt this detection method, combined Figure 2-5 As shown, the present invention particularly discloses a detection device, which includes a detection box 1 and a sampling and flushing mechanism 2. The sampling and flushing mechanism 2 can extract the laundry liquid sample in the packaging container 0 into the sample loading bucket 3 (that is, the sample carrier) in the detection box 1, and can pass the cleaning liquid into the sample loading bucket 3.

[0049] like Figure 3 As shown in FIG, the detection box 1 of the present invention is composed of a base frame 4 and a light shield 5 provided on the base frame 4. The sample loading hopper 3 is mounted on the base frame 4 and rotates with the base frame 4. The detection box 1 is also provided with a carrier driving mechanism for driving the sample loading hopper 3 to rotate.

[0050] In order to improve the installation stability of the sample loading bucket 3, a matching path is reserved for the matching of the sample loading bucket 3 and the sampling and flushing mechanism 2. The installation form of the sample loading bucket 3 of the present invention can be as follows: Figure 4 As shown in FIG, a support tube 11 is provided on the top surface of the base frame 4, the inner cavity of which constitutes a channel for the operation of the sampling and flushing mechanism 2. A connecting neck 12 is provided at the bottom of the sample loading hopper 3. The connecting neck 12 is mounted on a support tray 14 in the middle section of the support tube 11 via a tapered bearing 13 and forms a rotational fit with the support tube 11.

[0051] The carrier drive mechanism that can be used includes a ring gear 15 provided on the outer circumference of the connecting neck 12, and a rotary motor 16 mounted on the base frame 4. The output end of the rotary motor 16 is provided with a drive gear 17, which meshes with the ring gear 15. It is foreseeable that a combination of a synchronous wheel and a synchronous belt as the transmission component of the carrier drive mechanism or other carrier drive mechanisms that perform similar functions are also feasible.

[0052] In order to give full play to the characteristics of the sample hopper 3 rotation production, such as Figure 4 As shown in FIG, the sample loading hopper 3 of the present invention is composed of two inner and outer plates 6, with a cylindrical drainage area 7, a conical detection area 8, and a hollow disc-shaped feeding area 9 formed in the upper, middle, and lower sections, respectively. The plates 6 corresponding to the detection areas 8 are made of translucent glass 10. Infrared absorbance detection mechanisms are also provided in the detection boxes 1 on both sides of the detection areas 8.

[0053] The laundry detergent sample, drawn by the sampling and flushing mechanism 2, enters the feed area 9 of the sample hopper 3. As the hopper 3 rotates at high speed, the sample is ejected from the feed area 9 and enters the detection area 8 through the gaps between the plates 6 (at the detection area 8). The infrared absorbance detection mechanism measures the infrared absorbance of the sample in the detection area 8, obtaining its infrared absorbance and calculating its surfactant concentration using a standard absorbance curve. This calculation is typically handled by the device's accompanying control processor, with concentration data displayed locally on the display or uploaded to the master control system for remote presentation.

[0054] Regarding the layout of the infrared absorbance detection mechanism, it can be as follows Figure 4 As shown in , the infrared absorbance detection mechanism includes an infrared sensor 18 and an infrared light source 19, which can be set in multiple groups. Data correction and error revision are achieved between multiple groups, such as: finding the average value, taking the median value, etc. There are many specific processing methods, which will not be described one by one in the present invention. The infrared sensor 18 is set on the outside of the detection area 8 through the mounting bracket 20, and the infrared light source 19 is set on the inner surface of the top plate of the light shield 5. It also includes a light homogenizing plate 21, which covers the outside of the light-transmitting glass 10 on the inner side of the detection area 8. The light homogenizing plate 21 can make the infrared light source 19 more uniformly irradiate the detection area 8. Maintain the stability and consistency of the infrared light illumination at each position in the detection area 8.

[0055] The sampling and flushing mechanism 2 of the present invention is used to pump the sample in the packaging container 0 into the sample loading hopper 3 on the one hand, and to add the cleaning liquid into the sample loading hopper 3 on the other hand. Figure 4 As shown in FIG, the present invention includes a top frame 22 disposed above the detection box 1. A vertical screw rod 23 and a guide rod 24 are arranged side by side between the top frame 22 and the top of the detection box 1. The screw rod 23 is driven by a lifting motor 25 disposed on the top frame 22. A lifting frame 26 is provided outside the screw rod 23 and the guide rod 24. The lifting frame 26 forms a threaded and sliding fit with the screw rod 23 and the guide rod 24, respectively. Through the screw rod 23 and the guide rod 24, the present invention can drive the lifting frame 26 to move up and down, thereby driving the sampling tube 27, the cleaning tube 29, and other devices installed thereon to move up and down.

[0056] A sampling tube 27 is provided at the bottom of the lifting frame 26. The lower end of the sampling tube 27 extends into the test box 1 and is inserted into the support tube 11. A solid section 28 is provided at the lower end of the sampling tube 27, and the nozzle at the lower end of the sampling tube 27 is located on the side above the solid section 28. That is, during sampling, the sampling tube 27 first moves downward under the drive of the lifting frame 26 and extends into the packaging container 0. After absorbing a certain amount of sample liquid, it retracts and rises to the feed area 9 of the sample hopper 3, and discharges the sample liquid through the nozzle located on the side, facilitating uniform distribution in the feed area 9 for subsequent centrifugation. The solid section 28 ensures that the sampling tube 27 always forms a closed feed area 9, preventing the sample liquid from flowing out of the support tube 11. Compared with sampling methods that directly set the nozzle at the lower end of the sampling tube 27, the present invention has a sophisticated and reasonable structure.

[0057] To aspirate the sample liquid, the upper end of the sampling tube 27 is also equipped with a suction and discharge drive assembly for adjusting the pressure within the sampling tube 27 to achieve suction and discharge of the laundry liquid sample. For example, the suction and discharge drive assembly is an electric sampling piston 32 mounted on the lifting frame 26 and connected to the sampling tube 27. The piston rod of the electric sampling piston 32 extends and retracts, changing the pressure within the connected sampling tube 27, thereby achieving suction and discharge of the sample liquid within a section at the end of the sampling tube 27.

[0058] Since the sample loading hopper 3 is a rotary component, in order to meet the need of the cleaning liquid entering the feeding area 9, combined with Figure 4 and 5 As shown, a cleaning tube 29 is also sheathed on the upper section of the sampling tube 27, and the nozzle of the lower end of the cleaning tube 29 is also located on the side of the cleaning tube 29. A connecting sleeve 30 is provided on the outer sleeve of the upper end of the cleaning tube 29, and is connected to the liquid inlet pipe 31 for supplying cleaning liquid through the connecting sleeve 30. In this way, when the cleaning liquid is fed in, the nozzle of the lower end of the cleaning tube 29 can be located in the feed area 9 by raising and lowering the lifting frame 26, thereby achieving the cleaning liquid feeding. Of course, it is also feasible to directly use the sampling tube 27 as the cleaning tube 29. In this case, it is generally necessary to set an openable and closable electrically controlled valve on the liquid inlet pipe 31, and the opening and closing of the liquid inlet pipe 31 is controlled by the electrically controlled valve.

[0059] On this basis, in order to further improve the stability of the rotational motion of the sample loading bucket 3, a better solution may be that an extension sleeve 33 for being mounted on the outside of the cleaning pipe 29 is provided on the inner plate 6 corresponding to the feed area 9 of the sample loading bucket 3, and an inner lining bearing 34 is provided inside the extension sleeve 33.

[0060] Regarding the discharge of the sample liquid and the discharge of the cleaning liquid of the present invention, the following structure can be adopted, such as Figure 4As shown in the figure, a liquid collecting trough 35 is provided on the inner surface of the side wall of the light shield 5. The position of the liquid collecting trough 35 is opposite to the drainage area 7 of the sample loading hopper 3. The liquid collecting trough 35 is connected to the waste liquid tank 38 through a pipeline 36 and a drainage pump 37. A drainage hole 39 connected to the liquid collecting trough 35 is provided on the outer plate 6 of the drainage area 7. A sealing ring 40 is also inserted into the drainage area 7 of the sample loading hopper 3. A permanent magnetic ring 41 is provided on the top of the sealing ring 40, and an electromagnetic ring 42 is provided on the inner surface of the top plate of the light shield 5. The permanent magnetic ring 41 can drive the sealing ring 40 to move up and down under the drive of the electromagnetic ring 42, thereby opening and closing the drainage hole 39. Since the sealing ring 40 is provided, in order to prevent the sealing ring 40 from escaping from the drainage area 7, a limiting member 43 is also provided at the sealing ring 40. The limiting member 43 can have various structures. For example, a limiting block can be provided on the sealing ring 40, extending into the drainage hole 39. The limiting block can move in the height direction of the drainage hole 39 but can prevent the sealing ring 40 from falling out. Of course, other structures of the limiting member 43 are also feasible as long as the need for preventing the sealing ring 40 from falling out is met.

Claims

1. A method for detecting laundry detergent concentration, characterized in that: The following steps are involved: S1. Online sample collection: online extraction of laundry detergent from a packaging container (0) onto a sample carrier having a rotating function and a transparent detection area (8); S2. Sample preparation: By rotating the sample carrier, the laundry detergent sample on the sample carrier is evenly dispersed to the detection area of ​​the sample carrier using centrifugal force (8); S3. Infrared absorbance detection: using infrared spectroscopy to detect the laundry detergent sample in the detection area (8) to obtain the infrared absorbance of the laundry detergent sample; S4. Concentration calculation: Compare the detected infrared absorbance of the laundry detergent sample with the standard absorbance curve to obtain the surfactant concentration of the laundry detergent sample; S5. Repeat the above steps S1-S4 until all laundry detergent samples are tested; Between steps S4 and S5, the method further includes the steps of sample emptying: separating the laundry liquid sample from the detection area (8) of the sample carrier by rotating the sample carrier and utilizing centrifugal force; After the sample emptying step, the method further includes the step of washing the carrier: introducing a washing liquid into the sample carrier, rotating the sample carrier, utilizing centrifugal force to disperse the washing liquid into the detection area (8) of the sample carrier, and washing the laundry liquid sample remaining in the detection area (8); After the washing is completed, the washing liquid is separated from the detection area (8) of the sample carrier by centrifugal force; A detection device is used for detection, the detection device comprising a detection box (1) and a sampling and flushing mechanism (2), the sampling and flushing mechanism (2) being capable of extracting a laundry liquid sample in a packaging container (0) into a sample loading hopper (3) in the detection box (1), and being capable of introducing a cleaning liquid into the sample loading hopper (3); The detection box (1) is composed of a base frame (4) and a light shield (5) arranged on the base frame (4); the sample loading bucket (3) is installed on the base frame (4) and forms a rotational cooperation with the base frame (4), and a carrier driving mechanism for driving the sample loading bucket (3) to rotate is also provided in the detection box (1); the sample loading bucket (3) is composed of two layers of inner and outer plates (6), and a cylindrical liquid discharge area (7), a conical cylindrical detection area (8) and a hollow disc-shaped feeding area (9) are formed in the upper section, the middle section and the lower section respectively, and the plate (6) corresponding to the detection area (8) is composed of light-transmitting glass (10); infrared absorbance detection mechanisms are also provided in the detection box (1) on both sides of the detection area (8).

2. A detection device using the detection method according to claim 1, characterized in that: A support tube (11) is provided on the top surface of the base frame (4), and the inner cavity of the support tube (11) constitutes a channel for the operation of the sampling and flushing mechanism (2); a connecting neck (12) is provided at the bottom of the sample loading bucket (3), and the connecting neck (12) is mounted on a supporting tray (14) in the middle section of the support tube (11) through a tapered bearing (13), and forms a rotational fit with the support tube (11); The carrier drive mechanism comprises a ring gear (15) arranged on the outer peripheral surface of the connecting neck (12), and a rotary motor (16) mounted on the chassis (4), wherein the output end of the rotary motor (16) is provided with a driving gear (17), and the driving gear (17) is meshed with the ring gear (15).

3. The detection device according to claim 2, characterized in that: The infrared absorbance detection mechanism comprises an infrared sensor (18) and an infrared light source (19), wherein the infrared sensor (18) is arranged outside the detection area (8) via a mounting frame (20), and the infrared light source (19) is arranged on the inner surface of the top plate of the light shield (5); and further comprises a light homogenizing plate (21), wherein the light homogenizing plate (21) covers the outside of the light-transmitting glass (10) inside the detection area (8).

4. The detection device according to claim 3, characterized in that: The sampling and flushing mechanism (2) includes a top frame (22) arranged above the detection box (1), a vertical screw rod (23) and a guide rod (24) are arranged side by side between the top frame (22) and the top of the detection box (1), and the screw rod (23) is driven by a lifting motor (25) arranged on the top frame (22); a lifting frame (26) is provided on the outer sleeve of the screw rod (23) and the guide rod (24), and the lifting frame (26) respectively forms a threaded fit and a sliding fit with the screw rod (23) and the guide rod (24); A sampling tube (27) is provided at the bottom of the lifting frame (26), and the lower end of the sampling tube (27) extends into the detection box (1) and is passed through the support tube (11); a solid section (28) is provided at the lower end of the sampling tube (27), and the tube opening at the lower end of the sampling tube (27) is located on the side above the solid section (28); the upper end of the sampling tube (27) is also provided with a suction and discharge drive component for forming a suction and discharge of the laundry liquid sample by changing the pressure in the sampling tube (27); A cleaning tube (29) is also provided on the outer portion of the upper section of the sampling tube (27), and the nozzle of the lower end of the cleaning tube (29) is also located on the side of the cleaning tube (29); a connecting sleeve (30) is provided on the outer portion of the upper end of the cleaning tube (29), and is connected to a liquid inlet pipe (31) for supplying cleaning liquid through the connecting sleeve (30).

5. The detection device according to claim 4, characterized in that: The suction and discharge drive assembly is an electric sampling piston (32) arranged on a lifting frame (26) and connected to a sampling tube (27).

6. The detection device according to claim 5, characterized in that: An extension sleeve (33) for being sleeved on the outside of the cleaning pipe (29) is provided on the plate body (6) on the inner side corresponding to the feeding area (9) of the sample loading hopper (3), and an inner lining bearing (34) is provided inside the extension sleeve (33).

7. The detection device according to claim 6, characterized in that: A liquid collecting trough (35) is provided on the inner surface of the side wall of the light shield (5), and the position of the liquid collecting trough (35) is opposite to the drainage area (7) of the sample loading bucket (3), and the liquid collecting trough (35) is connected to the waste liquid tank (38) through a pipeline (36) and a drainage pump (37); a drainage hole (39) connected to the liquid collecting trough (35) is provided on the outer plate (6) of the drainage area (7); a sealing ring (40) is also inserted into the drainage area (7) of the sample loading bucket (3), and a permanent magnetic ring (41) is provided on the top of the sealing ring (40), and an electromagnetic ring (42) is provided on the inner surface of the top plate of the light shield (5); the permanent magnetic ring (41) can drive the sealing ring (40) to move up and down under the drive of the electromagnetic ring (42), thereby opening and closing the drainage hole (39).

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