NMP-based metal ion content detection structure

Abstract

The utility model discloses a detection structure based on NMP metal ion content, and relates to the technical field of metal ion content detection, the detection structure comprises an inductively coupled plasma mass spectrometer, one side of the inductively coupled plasma mass spectrometer is provided with a pre-filtering mechanism, the pre-filtering mechanism comprises a grading filtrate assembly, a filtering assembly and a filtering assembly, comprising an outer cylinder arranged on one side of the inductively coupled plasma mass spectrometer, a plurality of T-shaped limiting rods are fixed to the inner wall of the top of the outer cylinder, a fine filter screen cylinder is rotationally clamped to the inner sides of the T-shaped limiting rods, and a coarse filter screen cylinder rotationally connected with the bottom wall of the outer cylinder is arranged on the inner side of the fine filter screen cylinder; the problems that an existing detection device is generally lack of liquid filtering equipment, if impurities and other substances existing in an NMP solvent are not cleaned, the accuracy of a metal ion content detection result of the NMP solvent can be disturbed, most existing filtering structures can only conduct rough filtration, and a filtering net face is prone to being blocked by the impurities are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of metal ion content detection, in particular to a detection structure based on NMP metal ion content. Background Art

[0002] With the continuous advancement of science and technology, N-methylpyrrolidone (NMP), as an important organic solvent, has been widely used in the chemical, pharmaceutical, and lithium-ion battery manufacturing industries. Due to its excellent solubility and stability, NMP is often used as a solvent in the coating process of lithium-ion battery electrodes. However, during the production of lithium-ion batteries, residual NMP has a significant impact on battery performance, particularly cycling performance and safety. Therefore, accurate detection of NMP and its metal ion content is crucial for ensuring battery quality and improving product performance.

[0003] The reference patent is titled "A device for detecting metal ion content in wastewater" (authorization announcement number CN206710239U). The device combines flocculants with metal ions in wastewater to cause precipitation. The weight of the precipitate minus the weight of the flocculant is the metal ion content. The wastewater and flocculant are evenly transported to the material guide tray through the water pipes and agent delivery racks on the left and right sides. The motor drives the movable extension column to move the material guide tray up and down, and the movable extension column drives the upper and lower rotating disks to rotate together, so that the flocculant and metal ions combine more comprehensively and efficiently, ensuring that the device can detect the metal ion content in wastewater more efficiently and quickly. The detection device is easy to operate and the components are flexibly connected.

[0004] Based on the above patent, existing detection devices usually lack equipment for filtering liquids. If the impurities and other substances inside the NMP solvent are not cleaned, they will interfere with the accuracy of its metal ion content detection results. Most existing filtration structures can only perform coarse filtration, and the filter surface is easily clogged by impurities. Therefore, the present invention provides a detection structure based on the metal ion content of NMP. Utility Model Content

[0005] In response to the shortcomings of the existing technology, the utility model provides a detection structure based on the metal ion content of NMP, which solves the problem that existing detection devices usually lack equipment for filtering liquids. If impurities and other substances in the NMP solvent are not cleaned, they will interfere with the accuracy of its metal ion content detection results. Existing filtering structures are mostly only able to perform coarse filtration, and the filter surface is easily clogged by impurities.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a detection structure based on the NMP metal ion content includes an inductively coupled plasma mass spectrometer, and a pre-filtration mechanism is provided on one side of the inductively coupled plasma mass spectrometer, which includes:

[0007] The grading filtrate assembly includes an outer cylinder disposed on one side of the inductively coupled plasma mass spectrometer, wherein a plurality of sets of T-shaped limit rods are fixed to the inner wall of the top of the outer cylinder, and the inner sides of the plurality of sets of T-shaped limit rods rotatably clamp fine filter cylinders, and a coarse filter cylinder is provided inside the fine filter cylinder and rotatably connected to the bottom wall of the outer cylinder;

[0008] The driving assembly is arranged at the inner bottom end of the outer cylinder and is used to drive the fine filter cylinder and the coarse filter cylinder to rotate;

[0009] The cleaning component is arranged inside the graded filtrate component and is used to clean the filtered impurities attached to the outer surface of the fine filter cylinder and the coarse filter cylinder.

[0010] Preferably, the driving assembly includes a motor fixedly mounted on the outer wall of the bottom of the outer cylinder, and the upper end of the motor rotates the coarse filter cylinder through a transmission rod.

[0011] Preferably, a first pulley is fixed on the transmission rod, and a driven rod is rotatably installed on the bottom wall of the outer cylinder, and a second pulley is fixed to the upper end of the driven rod. The first pulley and the second pulley are connected by a transmission belt, a gear is fixed on the top of the driven rod, and an internal rack meshing with the gear is fixed on the bottom of the fine filter cylinder.

[0012] Preferably, the cleaning assembly includes a first cleaning rod brush fixedly mounted on the inner wall of the outer cylinder, and a second cleaning rod brush fixedly mounted on the inner wall of the fine filter cylinder.

[0013] Preferably, one end of the outer cylinder is interconnected with a conduit, and the other end of the conduit is connected to a transfer bottle, and the transfer bottle is connected to a pipette connected to the detection chamber of the inductively coupled plasma mass spectrometer.

[0014] Preferably, a partition plate is provided in the lower section inside the outer cylinder, and the partition plate blocks the driving assembly in the lower cavity.

[0015] Beneficial effects

[0016] The present invention provides a detection structure based on the metal ion content of NMP. Compared with the prior art, it has the following beneficial effects:

[0017] (1) The detection structure based on NMP metal ion content is designed with a pre-filtration mechanism, in which the coarse filter cylinder first contacts and intercepts most of the large particles, and then the solution enters the fine filter cylinder for more detailed filtration to further remove tiny impurities. The driving component is powered by a motor installed at the bottom of the outer cylinder. The motor directly drives the coarse filter cylinder to rotate through a transmission rod, and at the same time uses a belt transmission mechanism composed of a first pulley, a transmission belt and a second pulley to transmit power to the gear on the driven rod. The gear is engaged with the inner rack at the bottom of the fine filter cylinder, thereby driving the fine filter cylinder to rotate. This design ensures that the fine filter cylinder and the coarse filter cylinder can rotate in the same direction at a differential speed, thereby improving the filtration efficiency and preventing the filter from being blocked.

[0018] (2) The detection structure based on NMP metal ion content is further designed with a cleaning component, which includes a first cleaning rod brush and a second cleaning rod brush, which are respectively installed on the inner wall of the outer cylinder and the inner wall of the fine filter cylinder. As the filter rotates, the cleaning rod brushes continuously scrape the surface of the filter, effectively removing attached filter impurities and maintaining the patency and filtering effect of the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the three-dimensional appearance of the utility model;

[0020] Figure 2 This is a schematic cross-sectional view of the pre-filtering mechanism of the present invention;

[0021] Figure 3 This is a schematic diagram of the bottom section of the pre-filtering mechanism of the present invention;

[0022] Figure 4 This is a schematic diagram of the drive assembly structure of the present utility model.

[0023] In the figure: 1-inductively coupled plasma mass spectrometer, 2-pre-filtration mechanism, 21-graded filtrate assembly, 211-outer cylinder, 212-fine filter cylinder, 213-T-type limit rod, 214-coarse filter cylinder, 22-drive assembly, 221-motor, 222-transmission rod, 223-first pulley, 224-driven rod, 225-second pulley, 226-transmission belt, 227-gear, 228-inner rack, 23-cleaning assembly, 231-first cleaning rod brush, 232-second cleaning rod brush, 3-conduit, 4-transfer bottle, 5-pipette, 6-partition plate. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] See also Figure 1-4 The present invention provides a technical solution: a detection structure based on NMP metal ion content, including an inductively coupled plasma mass spectrometer 1, a pre-filtering mechanism 2 is provided on one side of the inductively coupled plasma mass spectrometer 1, and the pre-filtering mechanism 2 includes: a graded filtrate assembly 21, including an outer cylinder 211 arranged on one side of the inductively coupled plasma mass spectrometer 1, a plurality of groups of T-shaped limit rods 213 are fixed to the inner wall of the top of the outer cylinder 211, and the inner sides of the plurality of groups of T-shaped limit rods 213 are rotatably clamped with a fine filter cylinder 212, and a coarse filter cylinder 214 is provided on the inner side of the fine filter cylinder 212 and is rotatably connected to the bottom wall of the outer cylinder 211; a driving assembly 22 is provided at the inner bottom end of the outer cylinder 211, and is used to drive the fine filter cylinder 212 and the coarse filter cylinder 214 to rotate; a cleaning assembly 23 is provided on the inner side of the graded filtrate assembly 21, and is used to clean the filtered impurities attached to the outer surfaces of the fine filter cylinder 212 and the coarse filter cylinder 214.

[0026] In this embodiment, the driving assembly 22 includes a motor 221 fixedly mounted on the outer wall of the bottom of the outer cylinder 211. The upper end of the motor 221 rotates the coarse filter drum 214 through a transmission rod 222. A first pulley 223 is fixed on the transmission rod 222, and a driven rod 224 is rotatably mounted on the bottom wall of the outer cylinder 211. A second pulley 225 is fixed on the upper end of the driven rod 224. The first pulley 223 and the second pulley 225 are connected by a transmission belt 226. The driven rod 224 rotates A gear 227 is fixed at the top, and an inner rack 228 meshing with the gear 227 is fixed at the bottom of the fine filter screen cylinder 212. The motor 221 directly drives the coarse filter screen cylinder 214 to rotate through the transmission rod 222. At the same time, the belt transmission mechanism composed of the first pulley 223, the transmission belt 226 and the second pulley 225 is used to transmit power to the gear 227 on the driven rod 224. The gear 227 is meshed with the inner rack 228 at the bottom of the fine filter screen cylinder 212, thereby driving the fine filter screen cylinder 212 to rotate.

[0027] In this embodiment, the cleaning assembly 23 includes a first cleaning rod brush 231 fixedly mounted on the inner wall of the outer cylinder 211, and a second cleaning rod brush 232 fixedly mounted on the inner wall of the fine filter cylinder 212. As the filter rotates, the cleaning rod brush continuously scrapes the surface of the filter, effectively removing attached filter impurities and maintaining the patency and filtering effect of the filter.

[0028] In this embodiment, one end of the outer cylinder 211 is interconnected with a conduit 3, and the other end of the conduit 3 is connected to a transfer bottle 4, and the transfer bottle 4 is connected to a pipette 5 connected to the detection chamber of the inductively coupled plasma mass spectrometer 1. The NMP solution treated by the pre-filtration mechanism 2 has a purer metal ion content and then enters the transfer bottle 4 through the conduit 3 for temporary storage. The pipette 5 on the transfer bottle 4 transports the treated sample to the detection chamber of the ICP-MS.

[0029] In this embodiment, a partition plate 6 is provided in the lower section of the inner portion of the outer cylinder 211 , and the partition plate 6 blocks the driving assembly 22 in the lower cavity.

[0030] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0031] During operation, the NMP solution to be detected first enters the outer cylinder 211 of the pre-filtering mechanism 2 through the conduit 3. The outer cylinder 211 serves as the main body of the filtration system, and a graded filtrate assembly 21 is provided inside it for preliminarily filtering out larger solid particles and suspended matter; the graded filtrate assembly 21 includes a fine filter cylinder 212 and a coarse filter cylinder 214, both of which are fixed in the outer cylinder 211 by a T-shaped limit rod 213 and allowed to rotate relative to each other. The coarse filter cylinder 214 first contacts and intercepts most of the large particles, and then the solution enters the fine filter cylinder 212 for more detailed filtration to further remove tiny impurities. The driving assembly 22 is powered by a motor 221 installed at the bottom of the outer cylinder 211. The motor 221 directly drives the coarse filter cylinder 214 to rotate through the transmission rod 222, and at the same time uses a belt transmission mechanism composed of a first pulley 223, a transmission belt 226 and a second pulley 225 to transmit power to a gear 227 on the driven rod 224. The gear 227 is connected to the fine filter cylinder 212 The inner rack 228 at the bottom is engaged, thereby driving the fine filter cylinder 212 to rotate. This design ensures that the fine filter cylinder 212 and the coarse filter cylinder 214 can rotate in the same direction at a differential speed, thereby improving the filtration efficiency and preventing the filter from being blocked. The cleaning component 23 includes a first cleaning rod brush 231 and a second cleaning rod brush 232, which are respectively installed on the inner wall of the outer cylinder 211 and the inner wall of the fine filter cylinder 212. As the filter rotates, the cleaning rod brushes continuously scrape the surface of the filter, effectively removing attached filter impurities and maintaining the patency and filtration effect of the filter. The NMP solution treated by the pre-filtration mechanism 2 has a purer metal ion content and then enters the transfer bottle 4 for temporary storage through the conduit 3. The pipette 5 on the transfer bottle 4 transports the treated sample to the detection chamber of the ICP-MS. The ICP-MS uses inductively coupled plasma as an ion source to ionize the metal ions in the sample into gaseous ions, which are separated and detected by a mass spectrometer to ultimately obtain the precise content of metal ions in the NMP.

[0032] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A detection structure based on NMP metal ion content, comprising an inductively coupled plasma mass spectrometer (1), characterized in that: A pre-filtering mechanism (2) is provided on one side of the inductively coupled plasma mass spectrometer (1), and the pre-filtering mechanism (2) includes: The grading filtrate assembly (21) comprises an outer cylinder (211) arranged on one side of the inductively coupled plasma mass spectrometer (1), wherein a plurality of groups of T-shaped limiting rods (213) are fixed to the inner wall of the top of the outer cylinder (211), and the inner sides of the plurality of groups of T-shaped limiting rods (213) rotatably clamp a fine filter screen cylinder (212), and a coarse filter screen cylinder (214) rotatably connected to the bottom wall of the outer cylinder (211) is provided on the inner side of the fine filter screen cylinder (212); A driving assembly (22) is provided at the inner bottom end of the outer cylinder (211) and is used to drive the fine filter cylinder (212) and the coarse filter cylinder (214) to rotate; The cleaning component (23) is arranged inside the graded filtrate component (21) and is used to clean the filtered impurities attached to the outer surfaces of the fine filter cylinder (212) and the coarse filter cylinder (214).

2. The detection structure based on NMP metal ion content according to claim 1, wherein: The driving assembly (22) comprises a motor (221) fixedly mounted on the outer wall of the bottom of the outer cylinder (211); the upper end of the motor (221) causes the coarse filter cylinder (214) to rotate via a transmission rod (222).

3. The detection structure based on NMP metal ion content according to claim 2, wherein: A first pulley (223) is fixed on the transmission rod (222), and a driven rod (224) is rotatably mounted on the inner bottom wall of the outer cylinder (211), and a second pulley (225) is fixed on the upper end of the driven rod (224). The first pulley (223) and the second pulley (225) are connected to each other via a transmission belt (226). A gear (227) is fixed on the top end of the driven rod (224), and an inner rack (228) meshing with the gear (227) is fixed on the bottom of the fine filter cylinder (212).

4. The detection structure based on NMP metal ion content according to claim 1, wherein: The cleaning assembly (23) comprises a first cleaning rod brush (231) fixedly mounted on the inner wall of the outer cylinder (211), and a second cleaning rod brush (232) fixedly mounted on the inner wall of the fine filter cylinder (212).

5. The detection structure based on NMP metal ion content according to claim 1, wherein: One end of the outer cylinder (211) is interconnected with a conduit (3), and the other end of the conduit (3) is connected to a transfer bottle (4), and the transfer bottle (4) is connected to a pipette (5) that is connected to the detection chamber of the inductively coupled plasma mass spectrometer (1).

6. The detection structure based on NMP metal ion content according to claim 1, characterized in that: A partition plate (6) is provided in the lower section of the inner portion of the outer cylinder (211), and the partition plate (6) blocks the driving assembly (22) in the lower cavity.

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