Determination device for free silicon dioxide in dust

Abstract

A device for measuring free silicon dioxide in dust comprises a detection box body, one side of the detection box body is an open surface, an electric heating plate is arranged at the bottom of the detection box body, a plurality of detection positions are arranged on the electric heating plate, a lifting top plate is arranged at the top of the detection box body, electric push cylinders are arranged at the bottoms of the two sides of the lifting top plate, and push rods of the electric push cylinders face. A gasket is arranged at the end part of the push rod and is fixedly arranged on the top surface of the side wall of the detection box body; a plurality of hollow stirring shafts with two open ends are arranged on the lifting top plate, the plurality of hollow stirring shafts and the plurality of detection positions are aligned one by one in the longitudinal direction, stirring rods are arranged at the positions, close to the lower ends, of the hollow stirring shafts, a pyrophosphoric acid storage box is further arranged at the top of the lifting top plate, and the upper ends of the hollow stirring shafts extend into the pyrophosphoric acid storage box. By adopting the structure, the problems in the background technology can be effectively solved, a plurality of samples can be simultaneously analyzed, the accuracy of time and temperature is ensured, and the labor and time cost is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of air detection, in particular to a device for measuring free silicon dioxide in dust. Background Art

[0002] The determination of free silicon dioxide in dust is a very important test item in occupational health testing, and the sample volume is relatively large in daily testing work. According to the national occupational health standard "Determination of dust in workplace air Part 4: Free silicon dioxide content" GBZ / T192.4-2007, free silicon dioxide in dust is generally determined by the pyrophosphoric acid method.

[0003] To ensure the accuracy of the test results, the sample needs to be heated with pyrophosphoric acid for 15 minutes, the temperature needs to be controlled between 245-250°C, and stirring should be continued to ensure uniform heating. When the sample quantity is large, in order to ensure the accuracy of temperature and time control, the sample pretreatment can only be performed one by one. Therefore, it will take a long time. The labor cost is high and the results are greatly affected by human factors. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a device for measuring free silicon dioxide in dust, which can effectively solve the problems in the background technology, analyze multiple samples at the same time, and ensure the accuracy of time and temperature, greatly reducing labor and time costs.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a device for measuring free silica in dust, comprising a detection box, one side of the detection box is an open surface, an electric heating plate is provided at the bottom of the detection box, a plurality of detection positions are provided on the electric heating plate, a lifting top plate is provided at the top of the detection box, electric push cylinders are provided at the bottom of both sides of the lifting top plate, a push rod of the electric push cylinder is directed in the direction, a gasket is provided at the end of the push rod, and the gasket is fixedly arranged on the top surface of the side wall of the detection box;

[0006] The lifting top plate is provided with a plurality of hollow stirring shafts with openings at both ends, the plurality of hollow stirring shafts are aligned one by one with the plurality of detection positions in the longitudinal direction, a stirring rod is provided near the lower end of the hollow stirring shaft, a pyrophosphate storage tank is also provided on the top of the lifting top plate, and the upper end of the hollow stirring shaft extends into the pyrophosphate storage tank.

[0007] In a preferred solution, a temperature sensing sheet is provided on the side wall of the detection position, and multiple temperature sensing sheets on multiple detection positions are connected to the same temperature display module, and the temperature display module is arranged on the outer wall of the detection box body.

[0008] In a preferred embodiment, a plurality of arc-shaped cylinders are provided in the pyrophosphate storage tank, a cylindrical feed block is provided in the arc-shaped cylinder, a feed hole is provided on the side wall of the feed block, and the upper end of the hollow stirring shaft is connected to the inner cavity of the feed block.

[0009] In a preferred embodiment, a motor is provided at the center of the top of the pyrophosphate storage tank, and the upper end of a hollow stirring shaft located at the center of the detection box body extends to be connected to the shaft between the motor drive shaft.

[0010] In a preferred embodiment, among the plurality of hollow stirring shafts, two adjacent hollow stirring shafts are connected by a synchronous belt.

[0011] In a preferred solution, the synchronous belt and the pulley are arranged near the bottom surface of the lifting top plate.

[0012] The utility model provides a device for measuring free silicon dioxide in dust, which has the following beneficial effects by adopting the above structure:

[0013] (1) It can heat pyrophosphate in batches and automatically control temperature and time, ensuring the consistency of heating conditions during batch analysis, improving the quality control function of quality control samples, and shortening the analysis cycle;

[0014] (2) It avoids disturbance of the pyrophosphoric acid feeding structure by the stirring part and avoids collision damage between devices;

[0015] (3) The continuous addition of pyrophosphoric acid during the stirring process is achieved, thus avoiding the problem of decreased heating effect caused by directly adding a large amount of pyrophosphoric acid. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0018] Figure 2 This is a schematic diagram of the feed block structure of the utility model.

[0019] In the figure: detection box 1, electric heating plate 2, detection position 3, lifting top plate 4, electric push cylinder 5, push rod 501, gasket 502, temperature sensor 6, temperature display module 7, hollow stirring shaft 8, stirring rod 9, pyrophosphate storage box 10, feeding port 11, arc cylinder 12, feed block 13, feed hole 131, synchronous belt 14, motor 15. DETAILED DESCRIPTION

[0020] like Figure 1A device for measuring free silica in dust comprises a detection box 1, one side of the detection box 1 is an open surface, an electric heating plate 2 is provided at the bottom of the detection box 1, a plurality of detection positions 3 are provided on the electric heating plate 2, a lifting top plate 4 is provided at the top of the detection box 1, electric push cylinders 5 are provided at the bottom of both sides of the lifting top plate 4, a push rod 501 of the electric push cylinder 5 faces, a gasket 502 is provided at the end of the push rod 501, and the gasket 502 is fixedly arranged on the top surface of the side wall of the detection box 1;

[0021] The lifting top plate 4 is provided with a plurality of hollow stirring shafts 8 with openings at both ends. The plurality of hollow stirring shafts 8 are aligned one by one with the plurality of detection positions 3 in the longitudinal direction. A stirring rod 9 is provided near the lower end of the hollow stirring shaft 8. A pyrophosphate storage tank 10 is also provided on the top of the lifting top plate 4. The upper end of the hollow stirring shaft 8 extends into the pyrophosphate storage tank 10.

[0022] In a preferred solution, a temperature sensing sheet 6 is provided on the side wall of the detection position 3 , and multiple temperature sensing sheets 6 on multiple detection positions 3 are connected to the same temperature display module 7 , and the temperature display module 7 is provided on the outer wall of the detection box 1 .

[0023] In a preferred embodiment, a plurality of arc-shaped cylinders 12 are provided in the pyrophosphate storage tank 10 , a cylindrical feed block 13 is provided in the arc-shaped cylinder 12 , a feed hole 131 is provided on the side wall of the feed block 13 , and the upper end of the hollow stirring shaft 8 is connected to the inner cavity of the feed block 13 .

[0024] In a preferred embodiment, a motor 15 is provided at the top center of the pyrophosphate storage tank 10 , and an upper end of a hollow stirring shaft 8 located at the center of the detection box 1 extends to be axially connected to the driving shaft of the motor 15 .

[0025] In a preferred solution, among the plurality of hollow stirring shafts 8 , two adjacent hollow stirring shafts 8 are connected by a synchronous belt 14 .

[0026] In a preferred solution, the synchronous belt 14 and the pulley are arranged near the bottom surface of the lifting top plate 4.

[0027] The device for measuring free silicon dioxide in dust disclosed in the present invention is used for measuring free silicon dioxide in dust:

[0028] like Figure 1 Before the measurement, a certain amount of pyrophosphate is added to the pyrophosphate storage tank 10, and then the lifting top plate 4 is lifted by the electric push cylinder 5 until the stirring rod 9 part moves up to the outside of the detection position 3, and then the sample is added to the detection position 3, and then the height of the lifting top plate 4 is lowered by the electric push cylinder 5 until the stirring rod 9 moves down to the detection position 3;

[0029] Start the electric heating plate 2 to heat the detection position 3, and monitor the temperature of each detection position 3 in real time through the temperature display module 7 and adjust the power of the electric heating plate 2 according to the temperature to ensure that the temperature of the detection position 3 is between 245-250°C, then start the motor 15 to enable the multiple hollow stirring shafts 8 to rotate and stir. During this process, the feed block 13 rotates together, and when the feed hole 131 on the feed block 13 is aligned with the opening area of ​​the arc tube 12, pyrophosphoric acid enters the hollow stirring shaft 8 and flows into the detection position 3. This method can ensure the heating efficiency of the pyrophosphoric acid and avoid the direct addition of a large amount of pyrophosphoric acid, which leads to a decrease in heating efficiency and uneven heating.

Claims

1. A device for measuring free silicon dioxide in dust, comprising a detection box (1), one side of the detection box (1) being an open surface, characterized in that: The bottom of the detection box (1) is provided with an electric heating plate (2), a plurality of detection positions (3) are provided on the electric heating plate (2), a lifting top plate (4) is provided on the top of the detection box (1), electric push cylinders (5) are provided at the bottom of both sides of the lifting top plate (4), a push rod (501) of the electric push cylinder (5) is facing in the direction, a gasket (502) is provided at the end of the push rod (501), and the gasket (502) is fixedly arranged on the top surface of the side wall of the detection box (1); The lifting top plate (4) is provided with a plurality of hollow stirring shafts (8) with openings at both ends. The plurality of hollow stirring shafts (8) are aligned with the plurality of detection positions (3) in the longitudinal direction. A stirring rod (9) is provided near the lower end of the hollow stirring shaft (8). A pyrophosphate storage box (10) is also provided on the top of the lifting top plate (4). The upper end of the hollow stirring shaft (8) extends into the pyrophosphate storage box (10).

2. The device for measuring free silicon dioxide in dust according to claim 1, characterized in that: A temperature sensing sheet (6) is provided on the side wall of the detection position (3); a plurality of temperature sensing sheets (6) on a plurality of detection positions (3) are connected to the same temperature display module (7); and the temperature display module (7) is provided on the outer wall of the detection box (1).

3. The device for measuring free silicon dioxide in dust according to claim 1, characterized in that: The pyrophosphate storage box (10) is provided with a plurality of arc-shaped cylinders (12), a cylindrical feed block (13) is provided in the arc-shaped cylinder (12), a feed hole (131) is provided on the side wall of the feed block (13), and the upper end of the hollow stirring shaft (8) is connected to the inner cavity of the feed block (13).

4. The device for measuring free silicon dioxide in dust according to claim 1, characterized in that: A motor (15) is provided at the center of the top of the pyrophosphate storage box (10), and the upper end of a hollow stirring shaft (8) located at the center of the detection box (1) extends to be axially connected to the drive shaft of the motor (15).

5. The device for measuring free silicon dioxide in dust according to claim 4, characterized in that: Among the plurality of hollow stirring shafts (8), two adjacent hollow stirring shafts (8) are connected in transmission via a synchronous belt (14).

6. The device for measuring free silicon dioxide in dust according to claim 5, characterized in that: The synchronous belt (14) and the pulley are arranged at a position close to the bottom surface of the lifting top plate (4).

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