Formaldehyde detection device and detection method for nail polish production

Abstract

This invention relates to the field of nail polish testing devices, specifically to a formaldehyde testing device and method for nail polish production. The device includes a main body with an open top, a rotating seat rotatably mounted within the main body, a testing chamber located at the rotating seat, a cover plate with a feeding port, and a waste discharge port located directly below the feeding port at the bottom of the main body. The rotating seat has an opening. An exhaust port located on one side of the waste discharge port is also located at the bottom of the main body, and a pipe connected to the exhaust port is connected to a testing mechanism for detecting methane content. This invention employs a bypass sampling structure where the nail polish inlet pipe connects to the side wall of the filling pipeline. The sampling process directly connects to the production pipeline, eliminating the need to open and unseal the already filled and sealed nail polish product, significantly simplifying the sampling process.

Description

Technical Field

[0001] This invention relates to the field of nail polish testing devices, and more specifically, to a formaldehyde testing device and method for nail polish production. Background Technology

[0002] Nail polish is a widely used daily cosmetic product. Due to the influence of raw material formulation and processing technology, volatile formaldehyde substances are very likely to remain in the product. Formaldehyde is irritating and harmful. National cosmetic safety standards have set strict limits on the formaldehyde content of nail polish. Only products that meet the formaldehyde standards can be sold on the market. Therefore, formaldehyde content testing is a critical quality control step in the nail polish production process.

[0003] Currently, factories generally rely on sampling and testing finished products to detect formaldehyde content during the mass production of nail polish. Routine testing requires opening and unsealing the already filled and sealed nail polish products, manually extracting the liquid inside as a test sample. This process is cumbersome, sampling and testing are extremely inconvenient, and it also leads to sample loss and increases production and quality control costs.

[0004] If formaldehyde testing is to be carried out simultaneously with the nail polish filling process to avoid the drawbacks of finished product disassembly and inspection, traditional testing equipment has a simple structure and poor adaptability, and cannot be integrated into the filling process. The testing operation will occupy the filling station, interrupt the continuous operation of the production line, directly slow down the filling rhythm, greatly reduce the efficiency of the filling operation, seriously affect the overall production progress of nail polish, and is not conducive to the continuous operation of the production line.

[0005] Existing methods for detecting formaldehyde in nail polish have significant limitations. Testing after unpacking the finished product is cumbersome and impractical, while testing during the filling stage restricts production efficiency, making it difficult to balance quality control and mass production needs. Therefore, to address the shortcomings of existing technologies, there is an urgent need to design a nail polish formaldehyde detection device that is compatible with filling production lines, allows for online sampling, and does not interfere with normal filling operations. Summary of the Invention

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution.

[0007] A formaldehyde detection device for nail polish production includes a detection device body, which includes an installation box with an open top. A rotating seat is rotatably mounted inside the installation box, and a detection chamber is located at the rotating seat. A cover plate is provided inside the installation box, and the upper end of the rotating seat abuts against the cover plate to seal the detection chamber. A feeding port is located at the cover plate, and a nail polish inlet pipe is located at the feeding port. The end of the nail polish inlet pipe is connected to the side wall of a nail polish filling tube to feed nail polish from the filling tube into the nail polish inlet pipe. A solenoid valve is located at the nail polish inlet pipe. A waste discharge port is located at the bottom of the installation box, directly below the feeding port. An opening is located at the rotating seat. An exhaust port is located at the bottom of the installation box, on one side of the waste discharge port. An opening is located at the bottom of the detection chamber. A pipe at the exhaust port is connected to a detection mechanism for detecting methane content. An air inlet is located at the cover plate corresponding to the exhaust port.

[0008] As a preferred embodiment of the present invention, the rotating seat includes an inner sleeve and an outer sleeve, and a plurality of connecting plates are provided between the inner sleeve and the outer sleeve. The plurality of connecting plates are evenly distributed between the inner sleeve and the outer sleeve. An opening of the rotating seat is formed between two adjacent connecting plates, the inner sleeve and the outer sleeve. A bottom plate is provided at the bottom end between the inner sleeve and the outer sleeve, located between two adjacent connecting plates among the plurality of connecting plates. A detection cavity is formed between the bottom plate and its two adjacent connecting plates, the inner sleeve and the outer sleeve.

[0009] As a preferred embodiment of the present invention, the detection mechanism includes a sensor mounting housing connected to an exhaust pipe, a methane sensor for detecting methane content is provided in the sensor mounting housing, the detection device body also includes a control terminal, the control terminal is electrically connected to the methane sensor, the methane sensor is used to detect methane content and send data to the control terminal, and the sensor mounting housing is also provided with a fan for drawing the volatile gas of nail polish in the detection chamber to the methane sensor end.

[0010] As a preferred embodiment of the present invention, a filter mounting housing is connected to the sensor mounting housing and the exhaust port via a pipe. The filter mounting housing is equipped with a gas filter, which is used to filter impurities in the volatile gas of nail polish.

[0011] As a preferred embodiment of the present invention, the detection device body is provided with a drive mechanism for driving the rotating seat to rotate. The drive mechanism includes a gear ring disposed at the bottom end of the rotating seat, a rotating column disposed in the mounting box, a gear meshing with the gear ring at the bottom end of the rotating column, a servo motor disposed at the cover plate, the servo motor being connected to the rotating column to drive the rotating seat to rotate, and the servo motor being electrically connected to the control terminal.

[0012] As a preferred embodiment of the present invention, an electric heating plate for heating nail polish is provided at the base plate, and the electric heating plate is electrically connected to the control terminal.

[0013] As a preferred embodiment of the present invention, the detection device body is provided with a power supply mechanism for supplying power to the electric heating plate, the middle of the mounting box is provided with a mounting sleeve, the outer side wall of the mounting sleeve is provided with two conductive rings, the electric heating plate is provided with two power connection lines, the two power connection lines are respectively abutting against the two conductive rings; each of the two conductive rings is provided with a conductive cable, the conductive cable being electrically connected to the control terminal and the external power supply.

[0014] As a preferred embodiment of the present invention, the cover plate is provided with a liquid inlet on one side of the air inlet, and a cleaning liquid delivery pipe is provided at the liquid inlet. The cleaning liquid delivery pipe is used to deliver the cleaning liquid to the detection chamber to clean the nail polish in the detection chamber. The bottom end of the mounting box is provided with a drain outlet located directly below the liquid inlet.

[0015] As a preferred embodiment of the present invention, the cover plate is provided with a drying gas inlet located between the liquid inlet and the air inlet, and a drying gas inlet pipe is provided at the drying gas inlet. The drying gas inlet pipe is used to send drying gas into the detection chamber to dry the detection chamber. The bottom end of the mounting box is provided with a drying gas outlet located directly below the drying gas inlet.

[0016] The present invention also provides a formaldehyde detection method based on the above-mentioned formaldehyde detection device, which includes the following steps:

[0017] Step 1: Start the drive mechanism, rotate the detection chamber to directly below the feeding port and close the drive mechanism. Then open the solenoid valve so that the nail polish in the nail polish inlet pipe falls into the electric heating plate through the feeding port.

[0018] Step 2: Start the drive mechanism, rotate the detection chamber directly below the air inlet and then turn off the drive mechanism. Then, start the electric heating plate to heat the nail polish to generate nail polish volatile gas. Then, start the fan so that the nail polish volatile gas in the detection chamber passes through the detection chamber opening, exhaust port, gas filter and methane sensor in sequence. The methane sensor sends the detected data to the control terminal, thereby realizing the detection of methane content in nail polish.

[0019] Step 3: After the test is completed, turn off the electric heating plate and the fan, then start the drive mechanism to move the test chamber directly below the liquid inlet and turn off the drive mechanism. Then clean the nail polish residue in the test chamber through the cleaning fluid delivery pipe. The cleaning fluid is discharged through the test chamber opening and the drain port.

[0020] Step 4: After cleaning the residual nail polish in the detection chamber, start the drive mechanism to move the detection chamber directly below the drying gas inlet and then turn off the drive mechanism. Then, dry gas is sent into the detection chamber through the drying gas inlet pipe to dry the detection chamber. During the drying process, open the solenoid valve to discharge the nail polish residue in the inlet pipe through the rotating seat opening and the waste discharge outlet. After the nail polish residue in the inlet pipe is discharged, close the solenoid valve.

[0021] The beneficial effects of this invention are as follows:

[0022] 1. This invention adopts a bypass sampling structure that connects the nail polish inlet pipe to the side wall of the filling pipeline. The sampling process is directly connected to the production pipeline, eliminating the need to open and unseal the filled and sealed nail polish products. This greatly simplifies the sampling process, avoids the scrapping of finished products and sample loss caused by unsealing and testing, and can effectively reduce the quality inspection cost in the production process.

[0023] 2. The present invention uses a drive mechanism consisting of a servo motor, gears and gear rings to drive the rotating seat 210 to achieve rapid switching of the detection chamber position. The feeding, detection, cleaning and drying processes can be completed independently inside the device without occupying the nail polish filling station, and will not interrupt the continuous operation rhythm of the filling production line. The detection process and the production process can be carried out synchronously and in parallel.

[0024] 3. In this invention, the detection chamber and the cover plate are fitted together to form a sealed detection space, which can reduce the dilution and interference of external air, dust and other environmental factors on the volatile gas, and provide a stable detection environment for formaldehyde detection; the electric heating plate can adjust the heating temperature according to the characteristics of nail polish formula, so as to promote the full volatilization of formaldehyde in the sample and ensure that the methane sensor can collect a sufficient amount of detection gas. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the formaldehyde detection device used in nail polish production in Example 1;

[0026] Figure 2 This is a cross-sectional view of the formaldehyde detection device used in nail polish production in Example 1;

[0027] Figure 3 This is a cross-sectional view of the formaldehyde detection device used in nail polish production in Example 1;

[0028] Figure 4 This is a schematic diagram of the rotating seat in Example 1;

[0029] Figure 5 This is a schematic diagram of the mounting box in Example 1;

[0030] Figure 6 This is a schematic diagram of the cover plate in Example 1;

[0031] Figure 7 This is a circuit diagram of the formaldehyde detection device used in nail polish production in Example 1.

[0032] The attached figures are labeled as follows:

[0033] 100. Detection device body; 110. Mounting box; 120. Cover plate; 130. Nail polish inlet pipe; 140. Solenoid valve; 150. Air inlet; 160. Sensor mounting housing; 170. Filter mounting housing; 180. Servo motor; 190. Cleaning fluid delivery pipe; 1100. Drying gas inlet pipe; 210. Rotating seat; 220. Detection chamber; 230. Exhaust port; 240. Detection chamber opening; 250. Methane sensor; 260. Fan; 270. Gas filter Components: 280, mounting sleeve; 290, drying gas inlet; 2100, drying gas outlet; 310, feeding port; 320, waste outlet; 330, rotating seat opening; 340, rotating column; 350, gear; 360, liquid inlet; 370, liquid outlet; 410, inner sleeve; 420, outer sleeve; 430, connecting plate; 440, base plate; 450, gear ring; 460, electric heating plate; 470, power connection wire; 510, conductive ring; 520, conductive cable. Detailed Implementation

[0034] To further understand the content of this invention, a detailed description of the invention will be provided in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments are merely illustrative and not limiting of the invention.

[0035] Example 1, as Figure 1-7As shown, this embodiment provides a formaldehyde detection device for nail polish production, which includes a detection device body 100. The detection device body 100 includes a mounting box 110 with an open top. A rotating seat 210 is rotatably disposed inside the mounting box 110, and a detection chamber 220 is disposed at the rotating seat 210. A cover plate 120 is fitted on the mounting box 110, and the upper end of the rotating seat 210 abuts against the lower surface of the cover plate 120, which can provide a better sealing environment for the detection chamber 220 during the detection operation. A feeding port 310 is provided on the cover plate 120, and a nail polish inlet pipe 130 is connected to the feeding port 310. The end of the nail polish inlet pipe 130 is connected to the side wall of the nail polish filling pipe, which can bypass the filling pipe to extract nail polish samples. A solenoid valve 140 is provided on the nail polish inlet pipe 130 to control the opening and closing of the nail polish sample and the sample volume. The bottom of the mounting box 110 has a waste discharge port 320 located directly below the feeding port 310. The rotating seat 210 has a rotating seat opening 330, which can be aligned with the waste discharge port 320 to discharge residual materials from the pipeline and work station. The bottom of the mounting box 110 also has an exhaust port 230 located on one side of the waste discharge port 320. The bottom of the detection chamber 220 has a detection chamber opening 240. The exhaust port 230 is connected to a detection mechanism for detecting formaldehyde content through a pipe. The cover plate 120 has an air inlet 150 corresponding to the exhaust port 230. The air inlet 150 and the exhaust port 230 cooperate to ensure smooth gas flow in the detection chamber 220.

[0036] The rotating seat 210 includes an inner sleeve 410 and an outer sleeve 420. A plurality of connecting plates 430 are evenly arranged between the inner sleeve 410 and the outer sleeve 420. The rotating seat opening 330 is formed by the enclosing of two adjacent connecting plates 430, the inner sleeve 410, and the outer sleeve 420. A base plate 440 is provided at the bottom between the inner sleeve 410 and the outer sleeve 420. The base plate 440 is located between two adjacent connecting plates 430. The base plate 440, the two adjacent connecting plates 430, the inner sleeve 410, and the outer sleeve 420 enclose a detection cavity 220, which provides a dedicated space for the holding and evaporation of nail polish samples.

[0037] The detection mechanism includes a sensor mounting housing 160 connected to the exhaust port 230. A methane sensor 250 is installed inside the sensor mounting housing 160, which is used to detect the formaldehyde content in the volatile gases emitted by nail polish. The detection device body 100 is also equipped with a control terminal, which is electrically connected to the methane sensor 250. The methane sensor 250 can transmit the detection data to the control terminal in real time for recording and analysis. A fan 260 is also installed inside the sensor mounting housing 160. When the fan 260 is running, it generates negative pressure, directionally drawing the volatile gases in the detection chamber 220 to the detection end of the methane sensor 250. A filter mounting housing 170 is connected between the sensor mounting housing 160 and the exhaust port 230. A gas filter 270 is installed inside the filter mounting housing 170, which can filter out impurities and particulate matter in the volatile gases, reducing the influence of interfering substances on the detection data.

[0038] The main body 100 of the detection device is equipped with a drive mechanism for driving the rotating seat 210 to rotate. The drive mechanism includes a gear ring 450 set at the bottom of the rotating seat 210. A rotating column 340 is rotatably set inside the mounting box 110. A gear 350 that meshes with the gear ring 450 is set at the bottom of the rotating column 340. A servo motor 180 is set on the cover plate 120. The power output end of the servo motor 180 is connected to the rotating column 340, which can drive the rotating seat 210 to rotate smoothly. The servo motor 180 is electrically connected to the control terminal, which facilitates the control of the angle and timing of the workstation switching.

[0039] An electric heating plate 460 is installed on the base plate 440. The electric heating plate 460 can heat the nail polish sample in the detection chamber 220 to promote the full volatilization of formaldehyde. The electric heating plate 460 is electrically connected to the control terminal, and the heating temperature can be adjusted according to the detection requirements. The detection device body 100 is provided with a power supply mechanism to supply power to the electric heating plate 460. An installation sleeve 280 is provided in the middle of the installation box 110. Two conductive rings 510 are provided on the outer wall of the installation sleeve 280. Two power connection lines 470 are connected to the electric heating plate 460. The ends of the power connection lines 470 abut against the corresponding conductive rings 510. Both conductive rings 510 are connected to conductive cables 520. The conductive cables 520 are connected to the control terminal and an external power source, and can continuously and stably supply power to the electric heating plate 460 during the rotation of the rotating seat 210.

[0040] The cover plate 120 has a liquid inlet 360 located on one side of the air inlet 150. A cleaning fluid delivery pipe 190 is connected to the liquid inlet 360, which can send cleaning fluid into the detection chamber 220 to rinse away residual nail polish in the chamber. The bottom of the mounting box 110 has a drain outlet 370 located directly below the liquid inlet 360, which is used to discharge cleaning waste liquid. The cover plate 120 also has a drying gas inlet 290 located between the liquid inlet 360 and the air inlet 150. A drying gas inlet pipe 1100 is connected to the drying gas inlet 290, which can send drying gas into the detection chamber 220 to dry the cleaned chamber. The bottom of the mounting box 110 has a drying gas outlet 2100 located directly below the drying gas inlet 290, which is used to discharge drying waste gas.

[0041] This device relies on a control terminal to coordinate the operation of all components and complete the online detection of formaldehyde in nail polish. The control terminal sends a command to start the servo motor 180, which drives the rotating column 340 to rotate. Through the meshing transmission of gear 350 and gear ring 450, the rotating seat 210 is driven to rotate smoothly within the mounting box 110, causing the detection chamber 220 to switch sequentially to the feeding, detection, cleaning, and drying stations. During the feeding station operation, the detection chamber 220 rotates to be directly below the feeding port 310, and the control terminal opens the solenoid valve 140. The liquid in the nail polish filling tube falls into the electric heating plate 460 in the detection chamber 220 through the nail polish inlet pipe 130 and the feeding port 310. After sampling is completed, the solenoid valve 140 closes.

[0042] During operation at the testing station, the testing chamber 220 rotates to be directly below the air inlet 150. The control terminal activates the electric heating plate 460 to heat the nail polish sample, increasing the formaldehyde volatilization rate. Simultaneously, the fan 260 is activated. Under negative pressure, the formaldehyde volatilized gas in the testing chamber 220 enters the filter mounting housing 170 through the testing chamber opening 240 and the exhaust port 230. After the gas filter 270 removes impurities, the clean gas enters the sensor mounting housing 160 and contacts the methane sensor 250. The methane sensor 250 completes the detection and transmits the data to the control terminal.

[0043] During the cleaning station operation, the detection chamber 220 rotates to be directly below the liquid inlet 360. The cleaning fluid is flushed into the detection chamber 220 through the cleaning fluid delivery pipe 190 to rinse away any residual nail polish inside the chamber. The waste liquid is discharged through the detection chamber opening 240 and the drain port 370. During the drying station operation, the detection chamber 220 rotates to be directly below the drying gas inlet 290. The drying gas is sent into the detection chamber 220 through the drying gas inlet pipe 1100 to dry the chamber. The drying waste gas is discharged through the drying gas outlet 2100. During the drying process, the solenoid valve 140 can be briefly opened to allow residual nail polish in the nail polish inlet pipe 130 to be discharged through the rotating seat opening 330 and the waste outlet 320, preventing pipeline residue from affecting the next sampling. In the power supply mechanism, the conductive ring 510 maintains sliding contact with the power connection line 470, providing a stable power supply to the electric heating plate 460 while the rotating seat 210 is continuously rotating, ensuring the normal operation of the heating function.

[0044] The formaldehyde detection device for nail polish production in this embodiment, through the above-described technical solution, can achieve the following beneficial effects:

[0045] 1. The formaldehyde detection device for nail polish production in this embodiment adopts a bypass sampling structure in which the nail polish inlet pipe 130 is connected to the side wall of the filling pipeline. The sampling process is directly connected to the production pipeline, eliminating the need to open and unseal the filled and sealed nail polish products. This greatly simplifies the sampling process, avoids the scrapping of finished products and sample loss caused by unsealing for testing, and can effectively reduce the quality inspection cost in the production process. At the same time, the solenoid valve 140 can accurately control the sampling on / off and the sampling amount, eliminating the need for manual sample measurement, reducing errors caused by manual operation, and improving the convenience and standardization of sampling operations.

[0046] 2. In this embodiment, the formaldehyde detection device for nail polish production uses a drive mechanism consisting of a servo motor 180, a gear 350, and a gear ring 450 to drive the rotating seat 210 to quickly switch the workstation of the detection chamber 220. The feeding, detection, cleaning, and drying processes can be completed independently inside the device without occupying the nail polish filling station or interrupting the continuous operation rhythm of the filling line. The detection process and the production process can be carried out synchronously and in parallel, which can better adapt to the needs of large-scale and continuous nail polish production and avoid the problem of reduced production efficiency caused by interleaved detection.

[0047] 3. The detection chamber 220 and the cover plate 120 are fitted together to form a sealed detection space, which can reduce the dilution and interference of external air, dust and other environmental factors on volatile gases, and provide a stable detection environment for formaldehyde detection; the electric heating plate 460 can adjust the heating temperature according to the characteristics of nail polish formula, so as to promote the full volatilization of formaldehyde in the sample and ensure that the methane sensor 250 can collect a sufficient amount of detection gas; the gas filter 270 can filter out resin particles, solvent impurities and other interfering substances in the volatile gas, reduce the influence of non-target volatiles on the detection data, make the detection results closer to the true formaldehyde content of the sample, and improve the reliability of the detection data.

[0048] 4. The cleaning fluid delivery pipe 190 and the drain port 370 work together to automatically flush the nail polish residue in the detection chamber 220. The drying gas inlet pipe 1100 and the drying gas outlet 2100 can quickly dry the cleaned chamber, preventing liquid accumulation and residual liquid from adhering to the inner wall of the chamber and reducing the risk of cross-contamination between different batches of samples. At the same time, the rotating seat opening 330 and the waste outlet 320 can work together to discharge the residual material in the nail polish inlet pipe 130, preventing the residual material in the pipeline from mixing into the next batch of samples, and further improving the consistency and stability of data during continuous testing.

[0049] 5. The power supply mechanism adopts a power supply method in which the conductive ring 510 and the power connection line 470 slide in contact. This method can provide uninterrupted power supply to the electric heating plate 460 during the continuous rotation of the rotating seat 210, avoiding the problems of wire entanglement, pulling and breaking caused by rotation in traditional wired power supply. This ensures that the electric heating plate 460 can operate stably during work station switching, and improves the smoothness and durability of the overall operation of the device.

[0050] 6. The formaldehyde detection device for nail polish production in this embodiment can achieve automated operation of the entire process of sampling, detection, and cleaning by uniformly controlling components such as servo motor 180, solenoid valve 140, electric heating plate 460, and fan 260 through the control terminal, thereby reducing manual operation and intervention. The operating parameters of each component can be flexibly adjusted according to the detection standards and sample characteristics, which can adapt to the formaldehyde detection requirements of nail polish with different formulas and processes, thus improving the versatility and adaptability of the device.

[0051] Example 2: This example provides a formaldehyde detection method based on the formaldehyde detection device described in Example 1. The specific steps are as follows:

[0052] Step 1: The control terminal sends a command to start the drive mechanism. The servo motor 180 drives the gear 350 to mesh with the gear ring 450, driving the rotating seat 210 to rotate within the mounting box 110. After precisely rotating the detection chamber 220 to directly below the feeding port 310, the control terminal commands to close the drive mechanism, completing the precise alignment of the detection chamber 220 with the feeding station. Subsequently, the control terminal opens the solenoid valve 140. Under the pressure of the pipeline, the liquid in the nail polish filling tube falls steadily into the electric heating plate 460 in the detection chamber 220 through the nail polish inlet pipe 130 and the feeding port 310. After the sample volume reaches the detection standard, the control terminal closes the solenoid valve 140, completing the automated online sampling of the nail polish sample.

[0053] Step 2: The control terminal restarts the drive mechanism, driving the rotating seat 210 to rotate precisely so that the sampled detection chamber 220 is directly below the air inlet 150. Then, the drive mechanism is closed, aligning the detection chamber 220 with the detection station. The control terminal then activates the electric heating plate 460 to heat the nail polish sample in the detection chamber 220 at a preset temperature, causing the formaldehyde in the sample to fully volatilize and form volatile gas. Subsequently, the control terminal activates the fan 260, which generates negative pressure, drawing the volatile formaldehyde gas from the detection chamber 220 sequentially through the detection chamber opening 240 and the exhaust port 230 into the filter mounting housing 170. The gas filter 270 filters and purifies the volatile gas by removing impurities and particulate matter. The clean gas enters the sensor mounting housing 160 and contacts the methane sensor 250. After the methane sensor 250 completes the formaldehyde content detection, it transmits the detection data to the control terminal in real time for storage and analysis, completing the automated detection of formaldehyde content in the nail polish.

[0054] Step 3: After the inspection is completed, the control terminal sequentially shuts down the electric heating plate 460 and the fan 260 to stop the heating and air extraction operations. The control terminal starts the drive mechanism, rotates the inspection chamber 220 to directly below the liquid inlet 360, and then shuts down the drive mechanism to complete the alignment of the inspection chamber 220 with the cleaning station. Cleaning fluid is continuously delivered into the inspection chamber 220 through the cleaning fluid delivery pipe 190. The cleaning fluid washes away the residual nail polish on the inner wall of the inspection chamber 220 and the surface of the electric heating plate 460. Under the action of gravity, the cleaning waste liquid is discharged from the installation box 110 through the inspection chamber opening 240 and the drain port 370, completing the automated cleaning of the inspection chamber 220.

[0055] Step 4: After cleaning the residual nail polish in the detection chamber 220, the control terminal starts the drive mechanism to rotate the detection chamber 220 directly below the drying gas inlet 290, and then closes the drive mechanism to complete the alignment of the detection chamber 220 with the drying station. Drying gas is continuously supplied into the detection chamber 220 through the drying gas inlet pipe 1100 to dry the inner wall of the cleaned detection chamber 220 and the electric heating plate 460. The drying exhaust gas is discharged through the drying gas outlet 2100. While the detection chamber 220 is drying, the control terminal briefly opens the solenoid valve 140, and the residual nail polish in the nail polish inlet pipe 130 is discharged into the installation box 110 through the feeding port 310, the rotating seat opening 330, and the waste discharge port 320. After the residual material in the pipeline is discharged, the control terminal closes the solenoid valve 140 to complete the drying of the detection chamber 220 and the cleaning of the nail polish inlet pipe 130.

[0056] This testing method, relying on the rotating multi-station structure and automated control logic of the device, integrates sampling, testing, cleaning, drying, and pipeline residue removal processes into a single integrated system. Compared to traditional testing methods, it possesses technological advantages that are more suitable for industrial production. The online sampling step directly connects to the filling pipeline, eliminating the need for manual unpacking of finished products and measurement of samples, simplifying the sampling process, reducing sample loss and human error, and improving sampling efficiency. The formaldehyde testing step employs a coordinated operation of heating to promote volatilization, negative pressure extraction, and impurity filtration, improving the sufficiency and accuracy of formaldehyde detection and reducing interference from external factors. The chamber cleaning and drying steps quickly remove residual materials from the testing chamber 220, preventing cross-contamination between batches caused by liquid accumulation and residue adhesion, ensuring the stability of data from continuous testing. The simultaneous pipeline residue removal step removes residue from the nail polish inlet pipe 130, preventing residue from mixing into the next batch of samples, further improving the consistency of test data. The overall method has smooth transitions between steps and a high degree of automation. The testing process and filling operation are synchronized and run in parallel, without occupying the filling station or interrupting the production rhythm. It can better balance the needs of nail polish quality inspection and the efficiency of large-scale production.

[0057] In summary, the above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the present invention.

Claims

1. A formaldehyde detection device for nail polish production, characterized in that: The device includes a detection device body (100), which includes a mounting box (110) with an open top. A rotating seat (210) is rotatably mounted in the mounting box (110), and a detection chamber (220) is provided at the rotating seat (210). A cover plate (120) is provided in the mounting box (110), and the upper end of the rotating seat (210) abuts against the cover plate (120) to seal the detection chamber (220). A feeding port (310) is provided at the cover plate (120), and a nail polish inlet pipe (130) is provided at the feeding port (310). The end of the nail polish inlet pipe (130) is connected to the side wall of the nail polish filling pipe to deliver nail polish from the nail polish filling pipe. The nail polish is inserted into the nail polish inlet pipe (130), and a solenoid valve (140) is provided at the nail polish inlet pipe (130); the bottom end of the mounting box (110) is provided with a waste discharge port (320) located directly below the feed port (310), and the rotating seat (210) is provided with a rotating seat opening (330); the bottom end of the mounting box (110) is provided with an exhaust port (230) located on one side of the waste discharge port (320), and the bottom end of the detection chamber (220) is provided with a detection chamber opening (240). The pipe at the exhaust port (230) is connected to a detection mechanism for detecting methane content; the cover plate (120) is provided with an air inlet (150) corresponding to the exhaust port (230).

2. The formaldehyde detection device for nail polish production according to claim 1, characterized in that: The rotating seat (210) includes an inner sleeve (410) and an outer sleeve (420). A plurality of connecting plates (430) are provided between the inner sleeve (410) and the outer sleeve (420). The plurality of connecting plates (430) are evenly distributed between the inner sleeve (410) and the outer sleeve (420). A rotating seat opening (330) is formed between two adjacent connecting plates (430), the inner sleeve (410) and the outer sleeve (420). A bottom plate (440) is provided at the bottom end between the inner sleeve (410) and the outer sleeve (420) between two adjacent connecting plates (430). A detection cavity (220) is formed between the bottom plate (440) and its two adjacent connecting plates (430), the inner sleeve (410) and the outer sleeve (420).

3. The formaldehyde detection device for nail polish production according to claim 2, characterized in that: The detection mechanism includes a sensor mounting housing (160) connected to the exhaust port (230) pipe. The sensor mounting housing (160) is equipped with a methane sensor (250) for detecting methane content. The detection device body (100) also includes a control terminal, which is electrically connected to the methane sensor (250). The methane sensor (250) is used to detect methane content and send the data to the control terminal. The sensor mounting housing (160) is also equipped with a fan (260) for drawing the volatile gas of nail polish in the detection chamber (220) to the end of the methane sensor (250).

4. The formaldehyde detection device for nail polish production according to claim 3, characterized in that: A filter housing (170) is connected to the sensor mounting housing (160) and the exhaust port (230) by a pipe. The filter housing (170) is equipped with a gas filter (270) for filtering impurities in the volatile gas of nail polish.

5. The formaldehyde detection device for nail polish production according to claim 3, characterized in that: The detection device body (100) is provided with a drive mechanism for driving the rotating seat (210) to rotate. The drive mechanism includes a gear ring (450) located at the bottom end of the rotating seat (210). A rotating column (340) is provided in the mounting box (110). A gear (350) meshing with the gear ring (450) is provided at the bottom end of the rotating column (340). A servo motor (180) is provided at the cover plate (120). The servo motor (180) is connected to the rotating column (340) to drive the rotating seat (210) to rotate. The servo motor (180) is electrically connected to the control terminal.

6. The formaldehyde detection device for nail polish production according to claim 3, characterized in that: An electric heating plate (460) for heating nail polish is provided at the base plate (440), and the electric heating plate (460) is electrically connected to the control terminal.

7. The formaldehyde detection device for nail polish production according to claim 6, characterized in that: The detection device body (100) is provided with a power supply mechanism for supplying power to the electric heating plate (460). The middle part of the mounting box (110) is provided with a mounting sleeve (280). Two conductive rings (510) are provided on the outer side wall of the mounting sleeve (280). Two power connection lines (470) are provided at the electric heating plate (460). The two power connection lines (470) abut against the two conductive rings (510) respectively. Each of the two conductive rings (510) is provided with a conductive cable (520). The conductive cable (520) is electrically connected to the control terminal and the external power supply.

8. The formaldehyde detection device for nail polish production according to claim 1, characterized in that: The cover plate (120) is provided with a liquid inlet (360) located on the side of the air inlet (150). The liquid inlet (360) is provided with a cleaning fluid delivery pipe (190). The cleaning fluid delivery pipe (190) is used to deliver the cleaning fluid to the detection chamber (220) to clean the nail polish in the detection chamber (220). The bottom end of the mounting box (110) is provided with a drain outlet (370) located directly below the liquid inlet (360).

9. The formaldehyde detection device for nail polish production according to claim 8, characterized in that: The cover plate (120) is provided with a drying gas inlet (290) located between the liquid inlet (360) and the air inlet (150). The drying gas inlet (290) is provided with a drying gas inlet pipe (1100). The drying gas inlet pipe (1100) is used to send drying gas into the detection chamber (220) to dry the detection chamber (220). The bottom end of the mounting box (110) is provided with a drying gas outlet (2100) located directly below the drying gas inlet (290).

10. A formaldehyde detection method based on the formaldehyde detection device of claim 9, comprising the following steps: Step 1: Start the drive mechanism, rotate the detection chamber (220) to directly below the feeding port (310) and close the drive mechanism. Then open the solenoid valve (140) so that the nail polish in the nail polish inlet pipe (130) falls into the electric heating plate (460) through the feeding port (310). Step 2: Start the drive mechanism, rotate the detection chamber (220) to directly below the air inlet (150) and turn off the drive mechanism. Then start the electric heating plate (460) to heat the nail polish to form nail polish volatile gas. Then start the fan (260) so that the nail polish volatile gas in the detection chamber (220) passes through the detection chamber opening (240), the exhaust port (230), the gas filter (270) and the methane sensor (250) in sequence. The methane sensor (250) sends the detected data to the control terminal, thereby realizing the detection of methane content in nail polish. Step 3: After the test is completed, turn off the electric heating plate (460) and the fan (260), then start the drive mechanism to move the test chamber (220) directly below the liquid inlet (360) and turn off the drive mechanism. Then clean the nail polish residue in the test chamber (220) through the cleaning fluid delivery pipe (190). The cleaning fluid is discharged through the test chamber opening (240) and the drain port (370). Step 4: After the nail polish residue in the detection chamber (220) is cleaned, start the drive mechanism to move the detection chamber (220) directly below the drying gas inlet (290) and then turn off the drive mechanism. Then, dry gas is sent into the detection chamber (220) through the drying gas inlet pipe (1100) to dry the detection chamber (220). During the drying process of the detection chamber (220), open the solenoid valve (140) to discharge the nail polish residue in the nail polish inlet pipe (130) through the rotating seat opening (330) and the waste discharge outlet (320). After the nail polish residue in the nail polish inlet pipe (130) is discharged, close the solenoid valve (140).

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