A basic structure of CAD detector

Abstract

The present application discloses a basic structure of a CAD detector, which includes a body, a control panel is fixedly connected to the front end of the body, an atomizer is fixedly connected to the top of the body, a solvent hopper is fixedly connected to the top of the atomizer, and a filtering mechanism is located in the middle of the solvent hopper for filtering and separating large particles in the sample solvent; the filtering mechanism includes a fixed frame, two filter paper boards and a stirring assembly, and the two filter paper boards are installed on the inner wall of the fixed frame through a loading and unloading mechanism; in this scheme, by setting up the filtering mechanism, it is convenient to filter and separate large particles that are not fully dissolved in the sample solvent while stirring and mixing them to make them fully dissolved, thereby avoiding the large particles contained in the sample solvent affecting the atomization, thereby achieving the purpose of facilitating the normal atomization of the sample solvent, effectively improving the atomization effect of the sample solvent, and avoiding affecting the detection results.

Description

Technical Field

[0001] The present application relates to the technical field of CAD detectors, and in particular to a basic structure of a CAD detector. Background Art

[0002] CAD detector, also known as charged aerosol detector, is a universal mass detector suitable for liquid chromatography analysis. CAD detector has many advantages, such as a wide dynamic monitoring range, high sensitivity and repeatability, signal response consistency that is independent of chemical structure, as well as wide application and simple operation. It can detect non-volatile or semi-volatile substances without the need for chromophores or ionization processes. This detector has important applications in drug research and development, quality control, biopharmaceuticals, food and chemical industries, and is particularly suitable for the analysis of compounds with no or weak UV absorption.

[0003] When using the existing CAD detector, the sample solvent is usually added to the nebulizer for atomization to form particles, which are then dried by the evaporation tube in the machine body and collided with charged nitrogen gas to make the surface of the analyte particles positively charged. The charge on the surface of the analyte particles is then measured by an electrometer to determine the concentration of the substance.

[0004] However, when the above-mentioned method is used for detection, since the sample solvent is added to the nebulizer for atomization, the sample is often not fully dissolved in the sample solvent and contains a small amount of large particles, which often affects the atomization of the sample solvent and makes it difficult to atomize it, affecting the atomization effect, and further affecting the accuracy of subsequent detection results. Therefore, a technical personnel in this field provides a basic structure of a CAD detector to solve the problems raised in the above-mentioned background technology. Utility Model Content

[0005] In order to solve the problems raised in the above background technology, the present application provides a basic structure of a CAD detector.

[0006] The basic structure of a CAD detector provided in this application adopts the following technical solution:

[0007] A basic structure of a CAD detector includes a body, a control panel is fixedly connected to the front end of the body, an atomizer is fixedly connected to the top of the body, a solvent hopper is fixedly connected to the top of the atomizer, and further includes

[0008] A filtering mechanism, which is located in the middle of the solvent hopper and is used to filter and separate large particles in the sample solvent;

[0009] The filtering mechanism includes a fixed frame, two filter paper boards and a stirring assembly. The side wall of the fixed frame is fixedly connected to the middle of the solvent hopper. The two filter paper boards are installed on the inner wall of the fixed frame through a loading and unloading mechanism. The stirring assembly is installed in the middle of the fixed frame through a rotating assembly.

[0010] Preferably, the rotating assembly includes a waterproof motor, a rotating plate, two rotating shafts and two limit blocks, the waterproof motor is fixedly connected to the bottom center of the fixed frame, the bottom of the rotating plate is fixedly connected to the output end of the waterproof motor, one end of the two rotating shafts is respectively fixedly connected to the two ends of the rotating plate, and the two limit blocks are respectively fixedly connected to the other ends of the two rotating shafts.

[0011] Preferably, the stirring assembly includes two sliders, a plurality of rotating shafts and a plurality of stirring paddles, the two sliders are respectively slidably connected to the side walls of the two rotating shafts, one end of a plurality of rotating shafts are symmetrically rotationally connected to the side walls of the two sliders, and one end of a plurality of stirring paddles are evenly distributed and fixedly connected to the side walls of the plurality of rotating shafts.

[0012] Preferably, the filtering mechanism further comprises two second springs, one ends of the two second springs are respectively fixedly connected to the two ends of the rotating plate, and the other ends of the two second springs are respectively fixedly connected to the bottoms of the two sliding blocks.

[0013] Preferably, the loading and unloading mechanism includes a plurality of telescopic slots, a plurality of first springs, a plurality of limit blocks and a plurality of control slide rods, the plurality of telescopic slots are opened on the inner wall of the fixed frame, one end of the plurality of limit blocks are elastically connected to one end of the plurality of telescopic slots through a plurality of first springs, and the plurality of control slide rods are fixedly connected to the tops of the plurality of limit blocks by sliding through the tops of the plurality of telescopic slots.

[0014] Preferably, the loading and unloading mechanism further comprises a plurality of limit slots, wherein the plurality of limit slots are arranged on the side walls of the two filter paper boards, and the plurality of limit slots are matched with a plurality of limit blocks.

[0015] In summary, this application includes the following beneficial technical effects:

[0016] By setting up a filtering mechanism, it is convenient to filter and separate large particles that are not fully dissolved in the sample solvent while stirring and mixing them to make them fully dissolved, thereby avoiding the large particles contained in the sample solvent affecting the atomization. Therefore, it is achieved that the sample solvent can be atomized normally, the atomization effect of the sample solvent is effectively improved, and the purpose of avoiding affecting the test results is achieved. In addition, by setting up a loading and unloading mechanism, the filter paper board can be easily installed and disassembled, thereby achieving the purpose of facilitating the replacement of the filter paper board after long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the basic structure of a CAD detector in an embodiment of the present application;

[0018] Figure 2 It is a structural cross-sectional view of a solvent bucket of a basic structure of a CAD detector in an embodiment of the present application;

[0019] Figure 3 It is a structural cross-sectional view of a filtering mechanism of a basic structure of a CAD detector in an embodiment of the present application;

[0020] Figure 4 It is a partial structural exploded schematic diagram of a filtering mechanism of a basic structure of a CAD detector in an embodiment of the present application.

[0021] Explanation of the reference numerals: 1. machine body; 2. control panel; 3. atomizer; 4. solvent bucket; 5. filtering mechanism; 501. fixing frame; 502. filter paper board; 6. loading and unloading mechanism; 601. telescopic slot; 602. first spring; 603. limit block; 604. control slide bar; 7. limit slot; 8. rotating assembly; 801. waterproof motor; 802. rotating plate; 803. rotating shaft; 804. limit block; 9. stirring assembly; 901. sliding block; 902. rotating shaft; 903. stirring blade; 10. second spring. DETAILED DESCRIPTION

[0022] The following is combined with Figure 1-4 This application is described in further detail.

[0023] The present application embodiment discloses a basic structure of a CAD detector. Figure 2 Figure 3 A basic structure of a CAD detector includes a body 1, a control panel 2 is fixedly connected to the front end of the body 1, an atomizer 3 is fixedly connected to the top of the body 1, a solvent hopper 4 is fixedly connected to the top of the atomizer 3, and further includes

[0024] A filtering mechanism 5, which is located in the middle of the solvent hopper 4 and is used to filter and separate large particles in the sample solvent;

[0025] The filtering mechanism 5 includes a fixed frame 501, two filter paper boards 502 and a stirring assembly 9. The side wall of the fixed frame 501 is fixedly connected to the middle of the solvent hopper 4. The two filter paper boards 502 are installed on the inner wall of the fixed frame 501 through a loading and unloading mechanism 6. The stirring assembly 9 is installed in the middle of the fixed frame 501 through a rotating assembly 8.

[0026] The rotating assembly 8 includes a waterproof motor 801, a rotating plate 802, two rotating shafts 803 and two stop blocks 804. The waterproof motor 801 is fixedly connected to the bottom center of the fixing frame 501. The bottom of the rotating plate 802 is fixedly connected to the output end of the waterproof motor 801. One end of the two rotating shafts 803 is respectively fixedly connected to the two ends of the rotating plate 802. The two stop blocks 804 are respectively fixedly connected to the other ends of the two rotating shafts 803.

[0027] The stirring assembly 9 includes two sliders 901, a plurality of rotating shafts 902 and a plurality of stirring paddles 903. The two sliders 901 are slidably connected to the side walls of the two rotating shafts 803 respectively, one end of the plurality of rotating shafts 902 is symmetrically rotatably connected to the side walls of the two sliders 901, and one end of the plurality of stirring paddles 903 is evenly distributed and fixedly connected to the side walls of the plurality of rotating shafts 902.

[0028] The filter mechanism 5 further includes two second springs 10, one end of the two second springs 10 is fixedly connected to the two ends of the rotating plate 802, and the other end of the two second springs 10 is fixedly connected to the bottom of the two sliders 901.

[0029] In this embodiment, first, the sample solvent is stored in the solvent hopper 4, and then the sample solvent is atomized to form particles by the nebulizer 3. The atomized particles are then dried by the evaporator in the body 1 and collide with the charged nitrogen purged from the body 1 to make the particle surface positively charged. Then, the charge on the particle surface is measured and analyzed by the electrometer in the body 1 and converted into an electrical signal to be displayed by the control panel 2, thereby realizing the detection of the substance concentration. When the sample solvent is loaded into the solvent hopper 4, the solvent solution is filtered and screened by the two filter paper boards 502 fixedly installed by the fixing frame 501, so that large particles that are not fully dissolved in the solvent are filtered and separated. At this time, the waterproof motor 801 is started to provide a force to drive the rotating plate 802 to rotate above the fixing frame 501. The rotating plate 802 rotates to drive the two rotating shafts 803 connected thereto. As it rotates, the two rotating shafts 803 rotate and the lift force generated by the rotation causes the two sliders 901 to slide upward on the side walls of the two rotating shafts 803, and the second spring 10 provides a reaction force to cause the slider 901 to rebound downward. In this way, the slider 901 can slide back and forth on the rotating shaft 803 and move up and down by changing the rotation speed. In this way, the slider 901 can move up and down to drive the stirring paddle 903 connected to the rotating shaft 902 to follow the up and down movement, and the stirring paddle 903 can rotate in the vertical direction through the rotating shaft 902 while moving up and down through the resistance of the solution. Therefore, the large particles that are not fully dissolved in the solvent are stirred and mixed by the up and down movement and rotation of the stirring paddle 903 to make them fully dissolved, thereby achieving the effect of facilitating the filtration and separation of the large particles that are not fully dissolved in the sample solvent while stirring and mixing them to make them fully dissolved, so as to facilitate the normal atomization of the solvent.

[0030] Further, the loading and unloading mechanism 6 includes a plurality of telescopic slots 601, a plurality of first springs 602, a plurality of limit blocks 603 and a plurality of control slide bars 604. The plurality of telescopic slots 601 are provided on the inner wall of the fixing frame 501. One end of the plurality of limit blocks 603 is elastically connected to one end of the plurality of telescopic slots 601 through a plurality of first springs 602. The plurality of control slide bars 604 are fixedly connected to the tops of the plurality of limit blocks 603 by sliding through the tops of the plurality of telescopic slots 601.

[0031] The loading and unloading mechanism 6 further includes a plurality of limit slots 7, which are provided on the side walls of the two filter paper boards 502, and the plurality of limit slots 7 are matched with the plurality of limit blocks 603;

[0032] When filtering and separating large particles in the solvent through the filter paper 502 on the basis of the above embodiment, first, the control slide bar 604 is slidably arranged to drive the limiting block 603 to slide and retract into the telescopic groove 601. At this time, the filter paper 502 equipped with the filter paper is embedded in the fixing frame 501, and the reaction force provided by the first spring 602 causes the limiting block 603 to rebound and extend. The limiting block 603 rebounds and extends, thereby inserting into the limiting groove 7 provided on the side wall of the filter paper 502 to form a limiting engagement and fixation, thereby realizing the installation and use of the filter paper 502. After long-term use, similarly, the control slide bar 604 is slidably arranged to drive the limiting block 603 to slide and retract to release the engagement with the limiting groove 7, and the filter paper 502 is pulled out from the fixing frame 501, so that the filter paper 502 can be conveniently disassembled and replaced, thereby realizing the effect of facilitating the installation and disassembly of the filter paper 502.

[0033] The implementation principle of the basic structure of a CAD detector in the embodiment of the present application is as follows: when in use, first, the sliding control slide bar 604 is used to drive the limit card block 603 to slide and retract into the telescopic groove 601 under force. At this time, the filter paper board 502 equipped with filter paper is embedded in the fixed frame 501, and the reaction force provided by the first spring 602 causes the limit card block 603 to rebound and extend under force. The limit card block 603 rebounds and extends, thereby being inserted into the limit card slot 7 provided on the side wall of the filter paper board 502 to form a limit clamping fixation, thereby realizing the installation and use of the filter paper board 502. After long-term use, similarly, the sliding control slide bar 604 is used to drive the limit card block 603 to slide, retract and release the limit card The slot 7 is engaged, and the filter paper 502 can be pulled out from the fixing frame 501 to realize the convenient disassembly and replacement of the filter paper 502, thereby achieving the purpose of convenient installation and disassembly of the filter paper 502. Secondly, after the filter paper 502 is installed, when the sample solvent is loaded into the solvent bucket 4, the solvent solution is filtered and screened by the two filter paper boards 502 fixedly installed by the fixing frame 501, so that the large particles that are not fully dissolved in the solvent are filtered and separated. At this time, the waterproof motor 801 is started to provide a force to drive the rotating plate 802 to rotate above the fixing frame 501, and the rotating plate 802 rotates to drive the two rotating shafts 803 connected thereto. The two sliders 901 are forced to slide upward on the side walls of the two rotating shafts 803 by the rotation of the two rotating shafts 803, and the second spring 10 provides a reaction force to make the sliders 901 rebound downward. In this way, the sliders 901 can slide back and forth on the rotating shafts 803 and move up and down by changing the rotation speed. In this way, the sliders 901 can move up and down to drive the stirring blades 903 connected to the rotating shafts 902 to move up and down, and the stirring blades 903 can rotate in the vertical direction through the rotating shafts 902 while moving up and down due to the resistance of the solution, so that the stirring blades 903 can move up and down and rotate in the vertical direction, so that the stirring blades 903 can move the liquid that is not filled in the solvent. The partially dissolved large particles are stirred and mixed to make them fully dissolved, thereby effectively filtering and separating the large particles that are not fully dissolved in the sample solvent, and stirring and mixing them to make them fully dissolved, so as to facilitate the normal atomization of the solvent. Finally, the filtered solvent is atomized by the atomizer 3 to form particles, and the atomized particles are dried by the evaporation tube in the body 1, and collide with the charged nitrogen purged from the body 1 to make the surface of the particles positively charged, and then the electrometer in the body 1 measures and analyzes the charge on the surface of the particles and converts it into an electrical signal to be displayed through the control panel 2, thereby realizing the detection of the substance concentration.

[0034] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A basic structure of a CAD detector, comprising a body (1), characterized in that: The front end of the machine body (1) is fixedly connected to a control panel (2), the top of the machine body (1) is fixedly connected to an atomizer (3), the top of the atomizer (3) is fixedly connected to a solvent hopper (4), and further comprises A filtering mechanism (5) is located in the middle of the solvent hopper (4) and is used to filter and separate large particles in the sample solvent; The filtering mechanism (5) comprises a fixed frame (501), two filter paper sheets (502) and a stirring assembly (9); the side wall of the fixed frame (501) is fixedly connected to the middle part of the solvent hopper (4); the two filter paper sheets (502) are installed on the inner wall of the fixed frame (501) through a loading and unloading mechanism (6); and the stirring assembly (9) is installed on the middle part of the fixed frame (501) through a rotating assembly (8).

2. A basic structure of a CAD detector according to claim 1, characterized in that: The rotating assembly (8) comprises a waterproof motor (801), a rotating plate (802), two rotating shafts (803) and two limit blocks (804); the waterproof motor (801) is fixedly connected to the bottom center of the fixing frame (501); the bottom of the rotating plate (802) is fixedly connected to the output end of the waterproof motor (801); one end of the two rotating shafts (803) is respectively fixedly connected to the two ends of the rotating plate (802); and the two limit blocks (804) are respectively fixedly connected to the other ends of the two rotating shafts (803).

3. A basic structure of a CAD detector according to claim 2, characterized in that: The stirring assembly (9) comprises two sliders (901), a plurality of rotating shafts (902) and a plurality of stirring paddles (903); the two sliders (901) are respectively slidably connected to the side walls of the two rotating shafts (803); one end of the plurality of rotating shafts (902) are symmetrically rotationally connected to the side walls of the two sliders (901); and one end of the plurality of stirring paddles (903) are evenly distributed and fixedly connected to the side walls of the plurality of rotating shafts (902).

4. A basic structure of a CAD detector according to claim 3, characterized in that: The filtering mechanism (5) further comprises two second springs (10), one end of the two second springs (10) being respectively fixedly connected to the two ends of the rotating plate (802), and the other ends of the two second springs (10) being respectively fixedly connected to the bottoms of the two sliding blocks (901).

5. A basic structure of a CAD detector according to claim 1, characterized in that: The loading and unloading mechanism (6) comprises a plurality of telescopic slots (601), a plurality of first springs (602), a plurality of limit blocks (603) and a plurality of control slide bars (604); the plurality of telescopic slots (601) are arranged on the inner wall of the fixing frame (501); one end of the plurality of limit blocks (603) is elastically connected to one end of the plurality of telescopic slots (601) through the plurality of first springs (602); and the plurality of control slide bars (604) are fixedly connected to the tops of the plurality of limit blocks (603) by sliding through the tops of the plurality of telescopic slots (601).

6. A basic structure of a CAD detector according to claim 5, characterized in that: The loading and unloading mechanism (6) further comprises a plurality of limit slots (7), wherein the plurality of limit slots (7) are arranged on the side walls of the two filter paper boards (502), and the plurality of limit slots (7) are matched with a plurality of limit blocks (603).

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