Dissolving device for detecting sample treatment

Abstract

The invention discloses a dissolving device for detecting sample treatment, the device is composed of a heating device and a matched digestion tube, on the basis of an existing graphite heating and dissolving device, an ultrasonic emission source is additionally arranged, and the heating device is integrally arranged in a reflection bin, so that focusing of ultrasonic waves is realized. In this way, the energy of the ultrasonic waves can be concentrated in the reflection bin and is diffused outwards only through the cylindrical graphite heating assembly. And the positioning part of the digestion pipe is tightly clamped with the graphite heating assembly, and the heated part is in a suspended state. A plurality of resonance crystal rings are embedded in a heated part, the resonance crystal rings can generate resonance after receiving ultrasonic waves, then the heated part is caused to perform high-frequency and low-amplitude vibration, the vibration can quickly mix soil and mixed acid, and potential risks of manual mixing are eliminated. In addition, the ultrasonic waves directly transmitted into the digestion pipe can cause the cavitation effect of the liquid mixture in the digestion pipe, and the reduction process is promoted.

Description

Technical Field

[0001] The present invention relates to a detection experimental device, and particularly to a dissolution device for sample processing detection. Background Art

[0002] When performing soil element detection, digestion treatment must be carried out first to release the elements in the soil by the mixed acid digestion method for further detection.

[0003] In view of the fact that mixed acid digestion usually involves strong acids, the direct heating method is not applicable because it is difficult to control the temperature, increasing the risk of dangerous accidents. Therefore, a dissolution device is usually used for slow heating to maintain the temperature at about 120 degrees Celsius to ensure the smooth progress of the reaction. The digestion process may take several hours, with relatively low efficiency. In addition, manually mixing the mixed acid and soil is not only inefficient but also poses a safety risk. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a dissolution device for sample processing detection, which can effectively improve the efficiency of digestion and can automatically mix soil and mixed acid.

[0005] To solve the above technical problem, the technical solution of the present invention is: a dissolution device for sample processing detection, comprising a heating device and a supporting digestion tube; the heating device is composed of a substrate and a plurality of cylindrical graphite heating components integrated on the substrate, and an ultrasonic emitter is installed between the cylindrical graphite heating components on the substrate; the entire heating device is wrapped in a reflection chamber, and a plurality of through holes are provided at the top of the reflection chamber for the mouths of the cylindrical graphite heating components to pass through; the digestion tube is composed of a positioning section and a heated section, the positioning section is located in the upper part, its outer diameter matches the inner diameter of the cylindrical graphite heating component, and the outer diameter of the heated section is smaller than the inner diameter of the cylindrical graphite heating component, and a plurality of resonance crystal rings are dispersedly embedded on the heated section.

[0006] Further, the cylindrical graphite heating components are integrated on the substrate in an annular array, the ultrasonic emitter is installed at the central position, and the reflection chamber is cylindrical and concentric with the ultrasonic emitter.

[0007] Further, it further includes a housing, the top of the reflection chamber is flush with the surface of the housing, and the bottom of the reflection chamber is fixed to the inner bottom of the housing through a bracket.

[0008] Further, the peripheral wall of the reflection chamber is covered with a heat insulation cover.

[0009] Further, it further includes a pipe support, which is composed of a disk body and several card slots opened on the disk body corresponding to the positions of the cylindrical graphite heating components. Support rings are arranged at the edges of the card slots on the disk body. The inner diameter of the card slots matches the outer diameter of the positioning section of the digestion tube. A flange is formed outward at the top of the positioning section, and the outer diameter of the flange is larger than the outer diameter of the support ring. A plurality of positioning posts are arranged around the outer periphery of the reflection chamber at the top of the housing, and positioning cylinders are arranged at the corresponding positions at the bottom of the disk body.

[0010] Further, it further includes an electrical integration control cabinet, which is installed on the outer side of the housing.

[0011] The advantages of the present invention are as follows:

[0012] On the basis of the existing graphite heating and dissolving device, the present invention adds an ultrasonic emission source, and the heating device is integrally wrapped in the reflection chamber, so as to focus the ultrasonic wave, so that most of its energy is concentrated in the reflection chamber and only diverges through the cylindrical graphite heating component. The heated section of the digestion tube is in a suspended state, and a plurality of resonance crystal rings are embedded on the heated section. After receiving the ultrasonic wave, they will generate resonance, which will drive the heated section to vibrate at a high frequency and low amplitude, so as to quickly mix the soil and the mixed acid, and there is no risk of overflow, avoiding the risk of manual mixing.

[0013] At the same time, the ultrasonic wave directly transmitted to the inside of the digestion tube will cause cavitation effect in the internal liquid mixture, which is beneficial to the dissolution of the components to be detected in the soil and promotes the digestion process. Description of the Drawings

[0014] Figure 1 is a three-dimensional schematic diagram of the present invention Figure 1 ;

[0015] Figure 2 is a three-dimensional schematic diagram of the present invention Figure 2 (excluding the pipe support);

[0016] Figure 3 is a cross-sectional view of the present invention;

[0017] Figure 4 is an assembled three-dimensional view of the heating device;

[0018] Figure 5 is a structural schematic diagram of the digestion tube.

[0019] In the figure, 1 - housing, 11 - positioning post, 2 - electrical integration control cabinet, 3 - substrate, 31 - cylindrical graphite heating component, 32 - reflection chamber, 33 - heat insulation cover, 4 - ultrasonic emission source, 5 - digestion tube, 51 - positioning section, 52 - heated section, 53 - resonance crystal ring, 54 - flange, 6 - pipe support, 61 - card slot, 62 - support ring, 63 - positioning cylinder. Detailed Embodiments

[0020] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings. It should be noted here that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation on the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0021] As Figures 1-5 shown:

[0022] A dissolution device for detecting sample processing includes a heating device and a matching digestion tube 5. The heating device consists of a substrate 3 and a number of cylindrical graphite heating components 31 integrated on the substrate 3. On the substrate 3, an ultrasonic transmitter 4 is installed between the cylindrical graphite heating components 31. The entire heating device is wrapped in a reflection chamber 32, and there are a number of through holes at the top of the reflection chamber to allow the mouths of the cylindrical graphite heating components to pass through. The digestion tube 5 consists of a positioning section 51 and a heated section 52. The positioning section 51 is located in the upper part, and its outer diameter matches the inner diameter of the cylindrical graphite heating component 31, while the outer diameter of the heated section 52 is smaller than the inner diameter of the cylindrical graphite heating component 31. A number of resonance crystal rings 53 are dispersedly embedded on the heated section 52.

[0023] The present invention adds an ultrasonic transmitter 4 on the basis of the existing graphite heating dissolution device. The existing graphite heating dissolution device uses the cylindrical graphite heating component 31 to heat the digestion tube 5, and its efficiency is significantly higher than traditional methods such as water bath heating, and it is more energy-saving. The present invention realizes the focusing of ultrasonic waves by adding an ultrasonic heating source and wrapping the entire heating device in the reflection chamber 32, so that most of the energy is concentrated in the reflection chamber 32 and only diverges through the cylindrical graphite heating component 31.

[0024] Ultrasonic waves belong to mechanical waves and are longitudinal waves. When it propagates in a medium, the density of the medium will change periodically, which will naturally cause a change in pressure. Taking air as an example, when there is no sound wave propagation, the pressure everywhere is the atmospheric pressure PO. When a sound wave propagates, the pressure at each point will be higher than PO in half a cycle and lower than PO in the other half cycle. For a pure tone, the change in pressure is sinusoidal. The difference between the instantaneous value of the pressure and the average pressure P0 is called the sound pressure. The calculation results show that the amplitude P of the sound pressure is determined by the following formula: P = Awpc (where A represents the amplitude, w represents the angular frequency of vibration, p represents the density of the medium, and c represents the speed of sound waves in the medium). And because the amplitude of the vibration velocity of the medium particles is: V = Aw. Dividing the two equations gives: P / V = pc = Z, and Z is called the acoustic impedance of the medium.

[0025] Like light waves, sound waves will undergo reflection and refraction at the interface between two media. Part of the sound wave returns to the original medium for propagation, which is called the reflection of the sound wave, and the reflected wave is also called the echo. Another part of the sound wave enters the second medium, changes its traveling direction and continues to propagate, which is called refraction, and the refracted wave is also called the transmitted wave. The reflection and refraction of sound waves follow the laws of reflection and refraction of light. The ratio of the intensity Ir of the reflected wave to the intensity li of the incident wave is determined by the difference in acoustic impedance between the two media.

[0026] When the acoustic impedance values on both sides of the interface are very different, almost all of the sound wave is reflected. In practice, it is considered that when the difference in acoustic impedance is more than 20 times, it can be considered a total reflection interface. Therefore, the reflection chamber 32 can be made of high-density alloy, such as tungsten alloy or copper alloy.

[0027] When acid digesting the soil, the soil and the mixed acid are added into the digestion tube 5 according to the detection requirements, and then inserted into the cylindrical graphite heating component 31. At the same time, the heating and ultrasonic heat sources are started. The positioning section 51 of the digestion tube 5 will be firmly engaged with the graphite heating component, while the heated section 52 is in a suspended state. A plurality of resonance crystal rings 53 are embedded on the heated section 52. The resonance crystal rings 53 are made of crystals and have a very high resonance frequency, and their resonance frequency is within the frequency band of ultrasonic waves. After receiving the ultrasonic waves, the resonance crystal rings 53 will resonate. At this time, they are equivalent to a simplified version of the ultrasonic transducer, that is, the ultrasonic vibrator, driving the heated section 52 to vibrate at a high frequency and low amplitude, so as to quickly mix the soil and the mixed acid without the risk of overflow.

[0028] At the same time, the ultrasonic waves directly transmitted into the digestion tube 5 will cause a cavitation effect in the internal liquid mixture. Usually, there are more or less some microbubbles dissolved in the medium, and these bubbles vibrate under the action of ultrasonic waves. When the sound pressure reaches a certain value, the bubbles increase due to directional diffusion, form a resonance cavity and then suddenly close, which is the cavitation effect of ultrasonic waves. When these bubbles close, they will generate a pressure of several thousand atmospheres around them, forming a micro shock wave, which is beneficial to the dissolution of the components to be detected in the soil and promotes the digestion process.

[0029] In order to make the divergence and reflection of ultrasonic waves more uniform, the cylindrical graphite heating component 31 is integrated in an annular array on the substrate 3, the ultrasonic wave emission source 4 is installed at the central position, and the reflection chamber 32 is cylindrical and concentrically arranged with the ultrasonic wave emission source 4.

[0030] The top of the reflection chamber 32 needs to be flush with the surface of the housing 1 for easy operation. The bottom is fixed to the inner bottom of the housing 1 through a bracket, which can effectively reduce the heat transferred from the bottom of the reflection chamber 32 to the housing 1. At the same time, a heat insulation cover 33 can be wrapped around the peripheral wall of the reflection chamber 32 to prevent the housing 1 from overheating and causing burns to the experimental personnel. Of course, heat dissipation holes can also be opened on the housing 1 or heat dissipation fans can be added, etc.

[0031] To facilitate batch operation of the digestion tube 5, a tube rack 6 is further included. The tube rack 6 consists of a disk body and a plurality of card slots 61 formed on the disk body corresponding to the positions of the cylindrical graphite heating components 31. Support rings 62 are arranged at the edges of the card slots 61 on the disk body. The inner diameter of the card slot 61 matches the outer diameter of the positioning section 51 of the digestion tube 5. A flange 54 extending outward is formed at the top of the positioning section 51, and the outer diameter of the flange 54 is larger than the outer diameter of the support ring 62. A plurality of positioning posts 11 are arranged around the outer periphery of the reflection chamber 32 at the top of the housing 1, and positioning cylinders 63 are arranged at the corresponding positions at the bottom of the disk body.

[0032] In this way, when the digestion tube 5 is inserted, the positioning section 51 is further restricted by the card slot 61 to maintain stability, and the flange 54 is larger than the support ring 62, which facilitates the removal of the digestion tube 5.

[0033] The electrical integrated control cabinet 2 of the device can be installed outside the housing 1, that is, all electronic components are installed separately outside, and only the wires for step power supply and control are inside the housing 1. This can avoid the influence of high temperature on the electronic components and increase their service life.

[0034] The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, without departing from the principle and spirit of the present invention, various changes, modifications, substitutions, and variations made to these embodiments still fall within the protection scope of the present invention.

Claims

1. A dissolution device for detecting sample processing, characterized in that: It includes a heating device and a supporting digestion tube; the heating device consists of a substrate and several cylindrical graphite heating components integrated on the substrate. On the substrate, an ultrasonic emitter is installed between the cylindrical graphite heating components; the entire heating device is wrapped in a reflection chamber, and several through holes are provided at the top of the reflection chamber for the mouths of the cylindrical graphite heating components to pass through; the digestion tube consists of a positioning section and a heated section. The positioning section is located in the upper part, and its outer diameter matches the inner diameter of the cylindrical graphite heating component, while the outer diameter of the heated section is smaller than the inner diameter of the cylindrical graphite heating component. A plurality of resonance crystal rings are dispersedly embedded on the heated section.

2. The dissolution device for detecting sample processing according to claim 1, characterized in that: The cylindrical graphite heating components are integrated on the substrate in an annular array, and the ultrasonic emitter is installed at the central position. The reflection chamber is cylindrical and concentric with the ultrasonic emitter.

3. The dissolution device for detecting sample processing according to claim 2, characterized in that: It further includes a housing. The top of the reflection chamber is flush with the surface of the housing, and the bottom of the reflection chamber is fixed to the inner bottom of the housing through a bracket.

4. The dissolving device for detecting sample processing according to claim 1, wherein: The peripheral wall of the reflection chamber is covered with a heat insulation cover.

5. The dissolution device for detecting sample processing according to claim 3, characterized in that: It further includes a tube rack. The tube rack consists of a disc body and several card slots opened on the disc body corresponding to the positions of the cylindrical graphite heating components. Support rings are provided at the edges of the card slots on the disc body. The inner diameter of the card slots matches the outer diameter of the positioning section of the digestion tube. A flange is formed outward at the top end of the positioning section, and the outer diameter of the flange is larger than the outer diameter of the support ring; a plurality of positioning columns are provided around the outer circumference of the reflection chamber at the top of the housing, and positioning cylinders are provided at the corresponding positions at the bottom of the disc body.

6. The dissolving device for detecting sample processing according to any one of claims 1-5, characterized in that: It further includes an electrical integration control cabinet, and the electrical integration control cabinet is installed on the outside of the housing.

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