Grouping circulation type full-automatic free silicon dioxide pretreatment device

Abstract

The utility model relates to the technical field of detection pretreatment devices, in particular to a grouping circulating type full-automatic free silicon dioxide pretreatment device. Comprising a body, a filtering mechanism, a rotary sample disc, a heating mechanism and a cooling mechanism. The heating mechanism comprises a heating block, the heating block is close to the inner side of the machine body and arranged at the edge position of the rotary sample disc, heating grooves are formed in the heating block, and the number of the heating grooves is at least one and smaller than that of the sample positions. The cooling mechanisms are arranged on the machine body and are arranged on the two sides of the heating block. Through the structural improvement of the heating mechanism, the cooling mechanism and the rotary sample disc, in the specific treatment process, through a grouped heating and grouped filtering mode, the number of parts is reduced, the weight of the whole machine is reduced, and the cost is reduced. In the pretreatment process, the time for filtering is relatively long, and the digestion and dilution of subsequent samples are carried out while filtering is carried out in a grouping filtering manner, so that the pretreatment efficiency is greatly improved.

Description

Technical Field

[0001] This utility model relates to the technical field of pretreatment devices for detection, specifically to a group-cycle fully automatic free silica pretreatment device. Background Technology

[0002] Pneumoconiosis is an interstitial lung disease caused by long-term inhalation of large amounts of free silica and other dust, resulting in a reaction in lung tissue. According to the People's Republic of China National Occupational Health Standard GBZ / T192.4-2007, "Determination of Dust in Workplace Air Part 4: Free Silica Content," there are three methods for determining free silica: pyrophosphate method, X-ray diffraction method, and infrared spectrophotometry. Among these, the pyrophosphate method is a commonly used analytical method for detecting free silica due to its advantages such as stable detection, simple pretreatment, high accuracy, and minimal interference.

[0003] Before performing pyrophosphate analysis, sample pretreatment is required. Pretreatment mainly includes sample digestion and filtration. During digestion, the temperature must be strictly controlled between 245℃ and 250℃. If the temperature is too low, the silicates in the dust will not dissolve completely, resulting in higher results; if the temperature is too high, a gel-like precipitate will easily form, also leading to higher results. Existing group-circulating fully automated free silica pretreatment devices heat the entire sample using a heating mechanism before filtration. The disadvantages are: heating all samples uniformly requires a large heating element, increasing the overall weight and cost of the machine. Uniform heating followed by uniform cooling requires a separate cooling mechanism, further increasing the overall size of the machine. Uniform cooling also requires multiple cooling and stirring mechanisms, resulting in a heavy and costly product.

[0004] Therefore, structural improvements are needed to the existing free silica pretreatment equipment. Summary of the Invention

[0005] To address the shortcomings of existing technologies, such as large overall weight and high cost, this invention provides a group-circulating fully automatic free silica pretreatment device. Through a circulating structure, multiple groups of samples are cyclically heated, cooled, and filtered. The device has a compact structure, reduces overall weight, and lowers costs.

[0006] The technical solution of this utility model is as follows:

[0007] A group-cycle fully automated free silica pretreatment device includes a main body, a filtration mechanism, a heating mechanism, and a cooling mechanism disposed within the main body. The filtration mechanism is located on one side of the main body, while the heating and cooling mechanisms are located on the opposite side of the main body. A rotating sample disk is disposed between the filtration and heating mechanisms, and the rotating sample disk has several sample positions spaced circumferentially apart. Each sample position has a sample cup. The heating mechanism includes a heating block located near the inner side of the main body and at the edge of the rotating sample disk. The heating block has heating grooves, the number of which is at least one and less than the number of sample positions. The cooling mechanism is disposed on the main body and on both sides of the heating block.

[0008] Furthermore, the filtration mechanism includes a filter frame and a plurality of filter funnels arranged in a matrix on the filter frame. The filter frame is fixed to the left side of the machine body, and an XY axis drive assembly corresponding to the filtration mechanism is provided on the side wall of the frame. A sample dispensing mechanism is provided on the XY axis drive assembly, and a sample dispensing tube is provided on the sample dispensing mechanism.

[0009] Furthermore, the filter holder extends to the rotating sample disk, and a circular opening is provided at one end of the filter holder extending to the rotating sample disk, with the rotating sample disk positioned at the opening.

[0010] Furthermore, a buffer sample outlet tube with an inner diameter larger than the inner diameter of the sample outlet is fitted at the upper end of the tail end of the sample outlet tube near the sample outlet.

[0011] Furthermore, the lower end of the rotating sample disk is provided with a rotating shaft perpendicular to the rotating sample disk. The rotating shaft is connected to the output end of the drive motor, and the drive motor rotates to drive the rotating sample disk connected to the rotating shaft to rotate.

[0012] Furthermore, the sample cup includes a cup body and a downwardly protruding sample groove integrally formed with and communicating with the cup body, which matches the heating groove. The top opening of the sample groove is smaller than the bottom diameter of the cup body. An outwardly protruding annular limiting stage is provided on the upper middle side wall of the cup body, and the outer diameter of the annular limiting stage is larger than the diameter of the sample groove.

[0013] Furthermore, the heating block is provided with a heating block lifting mechanism, which drives the heating block to move closer to or away from the sample cup set on the sample position.

[0014] Furthermore, the heating groove is configured as an inwardly recessed arc-shaped groove, and two heating grooves are arranged side by side, with the distance between the centers of the two heating grooves being equal to the distance between the centers of adjacent sample positions.

[0015] Furthermore, the cooling mechanism is configured as a fan.

[0016] Furthermore, it also includes a liquid stirring mechanism, which is disposed on the upper side of the heating block, and the number of liquid stirring mechanisms matches the number of heating tanks.

[0017] Furthermore, it also includes a sampling mechanism adjacent to the liquid stirring mechanism, close to and connected to the filtration mechanism, the number of which matches the number of heating tanks.

[0018] The beneficial effects achieved by this utility model are as follows:

[0019] Compared to existing fully automated free silica pretreatment devices, this invention improves the structure of the heating mechanism, cooling mechanism, and rotating sample tray. In the specific processing, the use of group heating and group filtration reduces the number of components, decreasing the overall weight and lowering costs. Filtration is a time-consuming process in pretreatment; by using group filtration, subsequent sample digestion and dilution are performed simultaneously, significantly improving pretreatment efficiency. Specifically, existing free silica pretreatment devices with unified digestion and filtration require approximately 6 hours to process 10 samples. With the improved device of this invention, 12 samples can be processed in just 5 hours, greatly improving work efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall external structure of this utility model.

[0021] Figure 2 This is a schematic diagram of the internal structure of this utility model.

[0022] Figure 3 This is a schematic diagram of the internal structure of this utility model.

[0023] Figure 4 This is a schematic diagram of the sample cup in this utility model.

[0024] Figure 5 This is a schematic diagram of the heating mechanism in this utility model.

[0025] Figure 6 This is a rear view of the present invention after removing the rear cover of the frame.

[0026] In the diagram, 1. Body; 11. Door; 12. Exhaust pipe; 13. Display screen; 2. XY axis drive assembly; 21. Y-axis slide rail; 22. X-axis slide rail; 3. Sample dispensing mechanism; 31. Sample dispensing tube; 32. Buffer sample dispensing tube; 4. Filtration mechanism; 41. Filter frame; 42. Filter funnel; 5. Rotating sample tray; 51. Drive motor; 52. Rotating shaft; 6. Heating mechanism; 61. Heating block; 62. Heating tank; 63. Screw motor; 7. Fan; 8. Sampling mechanism; 81. Sampling tube; 9. Liquid stirring mechanism; 91. Stirring rod; 10. Sample cup; 101. Cup body; 102. Sample tank; 103. Annular limiting stage. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate preferred embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0031] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0034] like Figures 1-6 As shown, this utility model provides a group-cycle fully automatic free silica pretreatment device. The entire device includes a body 1, a filtration mechanism 4 disposed within the body 1, a rotating sample tray 5, a heating mechanism 6, a cooling mechanism, a liquid stirring mechanism 9, and a sampling mechanism 8. In this embodiment, as... Figure 1 As shown, the body 1 is a cuboid structure. The front end of the body 1 has a double-door structure, with a magnetic latch and a viewing window on the door 11. An exhaust pipe 12, communicating with the inner cavity of the body 1, is located at the upper end of the body 1. A display screen 13 is located on one side of the upper end of the body 1.

[0035] In this embodiment, as Figure 2 As shown, the filter mechanism 4 is located on the left side inside the body 1. The filter mechanism 4 includes a filter frame 41 and a plurality of filter funnels 42 arranged in a matrix on the filter frame 41. In this embodiment, there are 12 filter funnels 42, arranged in rows of 3, forming 4 columns. The filter funnels 42 are preferably those disclosed in the applicant's publication number CN222384287U. Of course, ordinary filter funnels on the market can also be selected, and there is no limitation here.

[0036] The side wall of the body 1 is provided with an XY axis drive assembly 2 corresponding to the filter mechanism 4. Specifically, the XY axis drive assembly 2 includes a Y-axis slide rail 21 and an X-axis slide rail 22 arranged perpendicularly to the Y-axis slide rail 21. The Y-axis slide rail 21 is fixed to one side of the filter frame 41 and is fixed to the upper end of the filter frame 41 by a fixing plate perpendicular to the bottom plate of the body 1. The X-axis slide rail 22 is connected to the Y-axis slide rail 21 through a Y-axis slider. A sample dispensing mechanism 3 is provided on the X-axis slide rail 22, and the sample dispensing mechanism 3 is connected to the X-axis slide rail 22 through an X-axis slider. A sample dispensing tube 31 is provided on the sample dispensing mechanism 3. In order to avoid the sample dispensing speed on the sample dispensing tube 31 being too fast and causing excessive force during the contact between the sample and the filter funnel 42, resulting in splashing, a buffer sample dispensing tube 32 with an inner diameter larger than the inner diameter of the sample dispensing port is sleeved at the upper end of the tail of the sample dispensing tube 31 near the sample dispensing port. The buffer sample dispensing tube 32 is set as an elastic rubber tube. Because the inner diameter of the buffer sample outlet tube 32 is larger than that of the sample outlet tube 31, the expansion of the outer diameter during sample outlet has a slowing effect, reducing the risk of splashing.

[0037] like Figure 2 and Figure 3 As shown, the heating mechanism 6 and the cooling mechanism are located on the right side of the body 1 opposite to the filtering mechanism 4. The heating mechanism 6 includes a heating block 61, and a rotating sample disk 5 is disposed between the filtering mechanism 4 and the heating mechanism 6. In this embodiment, the frame of the filter holder 41 extends to the rotating sample disk 5, and a circular opening is provided at one end of the filter holder 41 extending to the rotating sample disk 5. The rotating sample disk 5 is located at the opening.

[0038] The rotating sample disk 5 has several sample positions spaced circumferentially, and a sample cup 10 is placed on each sample position. A rotating shaft 52 perpendicular to the rotating sample disk 5 is located at the lower end of the rotating sample disk 5. A passive synchronous pulley parallel to the rotating sample disk 5 is located at the lower end of the rotating shaft 52. A driving pulley is located at the output end of the drive motor. The driving pulley and the passive synchronous pulley are connected by a synchronous belt, enabling the drive motor to rotate and drive the rotating sample disk 5 connected to the rotating shaft 52 to rotate.

[0039] In this embodiment, as Figure 4As shown, the sample cup 10 includes a cup body 101 and a downwardly protruding sample groove 102 integrally formed with and connected to the cup body 101, which matches the heating groove 62. The top opening of the sample groove 102 is smaller than the bottom diameter of the cup body 101. During heating, the sample groove 102 is covered by the heating groove 62, resulting in rapid and uniform heating. The sample temperature rises to 245℃-250℃ within 10 minutes and remains constant, with a temperature error ≤ ±0.1℃. An outwardly protruding annular limiting stage 103 is provided on the upper middle side wall of the cup body 101. The outer diameter of the annular limiting stage 103 is larger than the diameter of the sample position. That is, the annular limiting stage 103 secures the sample cup 10 in the sample position, preventing the sample cup from slipping.

[0040] The heating block 61 is located near the inner side of the machine body 1 and is positioned at the edge of the rotating sample disk 5. The heating block 61 is provided with a heating groove 62. In this embodiment, as shown... Figure 5 As shown, the heating groove 62 is configured as an inwardly recessed arc-shaped groove. Two heating grooves 62 are arranged side by side, and the distance between the centers of the two heating grooves 62 is equal to the distance between the centers of adjacent sample positions. Additionally, the heating block 61 is equipped with a heating block lifting mechanism, which drives the heating block 61 to move closer to or further away from the sample cup 10 positioned on the sample position. In this embodiment, the heating block lifting mechanism is configured as a lead screw motor 63, one end of which is connected to the heating block 61. The rotation of the lead screw motor 63 drives the heating block 61 to move up and down.

[0041] like Figure 2 and Figure 3 As shown, the cooling mechanism is mounted on the body 1 and positioned on both sides of the heating block 61. In this embodiment, the cooling mechanism is configured as a fan 7, which is positioned on both sides of the heating block 61 for air cooling of the sample.

[0042] like Figure 2 , Figure 3 and Figure 6As shown, it also includes a liquid stirring mechanism 9, which is disposed on the upper side of the heating block 61. The number of liquid stirring mechanisms 9 matches the number of heating tanks 62. In this embodiment, there are two sets of liquid stirring mechanisms 9. Each liquid stirring mechanism 9 is equipped with a stirring rod 91 and a liquid tube disposed on one side of the stirring rod 91. The stirring rod 91 is connected to a liquid stirring drive mechanism, which drives the stirring rod 91 and the liquid tube to move up and down synchronously, so that the temperature sensor on the stirring rod 91 can be inserted into the liquid in the sample tank 102. The stirring rod 91 is equipped with a temperature sensor. Through the temperature sensor on the stirring rod 91 and the temperature sensor on the heating mechanism 4, the temperature of the liquid in the sample cup is controlled between 245℃ and 250℃ during digestion by dual temperature control of the two temperature sensors.

[0043] The system also includes a sampling mechanism 8 adjacent to the liquid stirring mechanism 9, close to the filtering mechanism 4, and connected to the sample outlet mechanism 3 via a pipe. The number of sampling mechanisms 8 matches the number of heating tanks 62. In this embodiment, the sampling mechanisms 8 are configured in two groups, each corresponding to one of the two adjacent filtering funnels 42. A sampling tube driving mechanism is provided on each sampling mechanism 8, which drives the sampling tube 81 to move up and down. To facilitate uniform mixing of the liquid in the sample cup 10, an air outlet pipe is provided on one side of the sampling mechanism 8, parallel to the sampling tube 81. Air bubbles are generated through the air outlet pipe to mix the liquid in the sample cup 10 evenly. The evenly mixed liquid is then transported to the sample outlet pipe 31 through the sampling tube 81 for subsequent filtration.

[0044] In practical use, the sample to be digested is first placed in the sample cup 10 and positioned in the sample position on the rotating sample disk 5, and each sample cup 10 is labeled with a serial number. The device door 11 is closed, and the corresponding parameters are set via the control panel. First, the heating block 61 moves upward under the drive of the heating block drive mechanism, closely fitting the sample cup, and begins heating and digestion; then, the liquid stirring mechanism 9 descends into the liquid in the sample cup's sample tank, and stirring begins. The heating mechanism 6 first heats and digests the samples in samples 1 and 2, stirring simultaneously. After heating and digestion are complete, the heating block 61 moves downward under the drive of the heating block drive mechanism, and the fan 7 in the cooling mechanism operates for cooling. After cooling to the set temperature, the liquid stirring mechanism 9 moves upward to a certain height, and 60-80℃ purified water is added to the sample cup 10 to dilute the sample while stirring. Water is added twice. After stirring, the stirring mechanism moves upward back to its initial position, the heating block lifting mechanism descends to its initial position, and the rotating sample tray 5 rotates two positions to reach the sample dispensing mechanism 3. The sample dispensing mechanism 3 picks up the sample and transfers it through a pipe to the sample dispensing tube 31. Driven by the XY axis drive assembly 2, the sample dispensing tube 31 transfers the corresponding sample to the filter funnel 42 for filtration. During the filtration of samples 1 and 2, samples 3 and 4 simultaneously rotate into the heating tank 62 for heating digestion and cooling dilution. Throughout the process, the grouped heating and filtration method reduces the overall cost of the machine and improves processing efficiency.

[0045] The embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A group-cycle fully automatic free silica pretreatment device, comprising a body (1), a filtration mechanism (4), a heating mechanism (6), and a cooling mechanism disposed within the body (1); characterized in that: The filtration mechanism (4) is located on one side of the body (1), and the heating mechanism (6) and cooling mechanism are located on the other side of the body (1) opposite to the filtration mechanism (4). The rotating sample disk (5) is located on the upper part of the heating mechanism (6). The rotating sample disk (5) is provided with a number of sample positions arranged at circumferential intervals, and a sample cup (10) is provided on the sample positions. The heating mechanism (6) includes a heating block (61). The heating block (61) is located close to the inner side of the body (1) and is located at the edge of the rotating sample disk (5). The heating block (61) is provided with a heating groove (62). The number of heating grooves (62) is at least one and less than the number of sample positions. The cooling mechanism is located on the body (1) and is located on both sides of the heating block (61).

2. The group-cycle fully automatic free silica pretreatment device according to claim 1, characterized in that: The filtration mechanism (4) includes a filter frame (41) and a plurality of filter funnels (42) arranged in a matrix on the filter frame (41); the filter frame (41) is fixed on the left side inside the body (1), and an XY axis drive assembly (2) corresponding to the filtration mechanism (4) is provided on the side wall of the body (1), and a sample dispensing mechanism (3) is provided on the XY axis drive assembly (2), and a sample dispensing tube (31) is provided on the sample dispensing mechanism (3).

3. The group-cycle fully automatic free silica pretreatment device according to claim 2, characterized in that: The filter holder (41) extends to the rotating sample disk (5), and a circular opening is provided at one end of the filter holder (41) extending to the rotating sample disk (5). The disk body of the rotating sample disk (5) is located at the opening.

4. The group-cycle fully automatic free silica pretreatment device according to claim 2, characterized in that: The upper end of the tail of the sample outlet tube (31) near the sample outlet is fitted with a buffer sample outlet tube (32) with an inner diameter larger than that of the sample outlet.

5. The group-cycle fully automatic free silica pretreatment device according to claim 1, characterized in that: The sample cup (10) includes a cup body (101) and a downwardly protruding sample groove (102) that is integrally formed with and communicates with the cup body (101) and matches the heating groove (62). The top opening of the sample groove (102) is smaller than the bottom diameter of the cup body (101). An outwardly protruding annular limiting stage (103) is provided on the upper middle side wall of the cup body (101). The outer diameter of the annular limiting stage (103) is larger than the diameter of the sample groove.

6. The group-cycle fully automatic free silica pretreatment device according to claim 1, characterized in that: The heating block (61) is provided with a heating block lifting mechanism, which drives the heating block (61) to move closer to or further away from the sample cup (10) set on the sample position.

7. The group-cycle fully automatic free silica pretreatment device according to claim 1, characterized in that: The heating groove (62) is configured as an inwardly recessed arc-shaped groove. Two heating grooves (62) are arranged side by side, and the distance between the centers of the two heating grooves (62) is equal to the distance between the centers of adjacent sample positions.

8. The group-cycle fully automatic free silica pretreatment device according to claim 1, characterized in that: The cooling mechanism is configured as a fan (7).

9. The group-cycle fully automatic free silica pretreatment device according to claim 1, characterized in that: It also includes a liquid stirring mechanism (9), which is disposed on the upper side of the heating block (61), and the number of liquid stirring mechanisms (9) matches the number of heating tanks (62).

10. The group-cycle fully automatic free silica pretreatment device according to claim 9, characterized in that: It also includes a sampling mechanism (8) adjacent to the liquid stirring mechanism (9), close to and connected to the filtration mechanism (4), the number of which matches the number of heating tanks (62).

Images