Pressurized wet digestion device

Abstract

The invention discloses a pressurized wet digestion device, including: a plurality of digestion tanks; an isolation assembly, the isolation assembly includes a plurality of isolation tanks, the isolation tanks are formed with an isolation cavity suitable for accommodating the digestion tanks, the digestion tanks can be detachably accommodated in the isolation cavity, and the isolation tanks and the digestion tanks are formed with anti-expansion structures for limiting the thermal expansion of the digestion tanks in the up and down directions; a heating element, the heating element is formed with a plurality of heating cavities suitable for accommodating the isolation tanks, the isolation tanks can be detachably arranged in the heating cavity; a sealing assembly, the sealing assembly is used to seal the digestion tanks. The pressurized wet digestion device can improve the heat dissipation efficiency, reduce the expansion and fracture of the digestion tanks, increase the service life, and reduce the use cost of the pressurized wet digestion device.

Description

Technical Field

[0001] The invention relates to the technical field of chemical instruments, and in particular to a pressurized wet digestion device. Background Art

[0002] Existing wet digestion methods mainly include microwave digestion and electric heating and pressurized digestion. Compared with microwave digestion, electric heating and pressurized digestion heats more evenly. In the wet digestion process, the electric heating and pressurized wet digestion device needs to place the sample and the digestion solution in a sample tank, and put it into the digestion heating chamber for heating to quickly increase the temperature. Since the electric heating and pressurized wet digestion device is sealed by a sealing component during the heating process, the temperature and pressure in the sample tank continue to increase. The sample tank is made of plastic. When heating and increasing the pressure, the sample tank is easily heated to expand and deform, and as the pressure in the sample tank increases, the sample tank is also easily deformed. Since the sample tank is placed in a heating tank, the heating tank limits the radial direction of the sample tank. Deformation causes the sample can to deform easily in the up and down directions. The thickness of the sample can decreases after deformation and expansion, making the deformed sample can easily break and become unusable. As a result, the sample can has a short service life and needs to be replaced frequently, which not only increases the cost of wet digestion, but also easily leads to sample leakage due to sample can breakage. Moreover, after the electric heating wet digestion is completed, the sample can needs to be cooled down. However, the sample can is placed in the heating chamber. Due to the deformation and expansion of the sample can, it is difficult to take it out of the heating can of the heating element. The temperature of the heating element is high. After the digestion reaction is completed, there is a large amount of residual heat in the heating element, and the heat dissipation is slow. This also leads to poor heat dissipation efficiency of the sample can in the heating element, which is not conducive to the heat dissipation of the sample can, and also makes the wet digestion time longer. Summary of the invention

[0003] The object of the present invention is to provide a pressurized wet digestion device, which can improve heat dissipation efficiency, reduce expansion and fracture of a digestion tank, increase service life, and reduce the use cost of the pressurized wet digestion device.

[0004] According to an embodiment of the present invention, the pressurized wet digestion device includes: a plurality of digestion tanks; an isolation assembly, wherein the isolation assembly includes a plurality of isolation tanks, wherein the isolation tanks are formed with isolation cavities suitable for accommodating the digestion tanks, wherein the digestion tanks can be detachably accommodated in the isolation cavities, and wherein the isolation tanks and the digestion tanks are formed with anti-expansion structures for limiting the thermal expansion of the digestion tanks in the upper and lower directions; a heating element, wherein the heating element is formed with a plurality of heating cavities suitable for accommodating the isolation tanks, wherein the isolation tanks can be detachably arranged in the heating cavities; and a sealing assembly, wherein the sealing assembly is used to seal the digestion tanks.

[0005] According to some embodiments of the present invention, the anti-expansion structure includes a first limiting structure formed on the digestion tank and a second limiting structure formed in the isolation chamber, and the first limiting structure stops at the lower surface of the second limiting structure to prevent the digestion tank from expanding and extending upward due to heat.

[0006] Optionally, the anti-expansion structure is formed as a threaded structure, the first limiting structure is a first thread formed on the surface of the digestion tank, and the second limiting structure is a second thread formed on the inner wall of the isolation chamber and suitable for cooperating with the first thread.

[0007] According to some embodiments of the present invention, the anti-expansion structure is formed on the upper portion of the digestion tank and the isolation chamber.

[0008] According to some embodiments of the present invention, the isolation assembly includes a plurality of first sub-isolation assemblies, each of which includes at least one isolation tank. The sealing assembly includes a plurality of first sub-sealing assemblies, each of which includes at least one sealing cover for sealing the digestion tank, and the sealing cover corresponds to the isolation tank of the first sub-isolation assembly one by one.

[0009] Optionally, each of the first sub-isolation assemblies includes a plurality of the isolation tanks, and the first sub-isolation assembly further includes: a supporting portion, the supporting portion being connected to the outer wall surfaces of the plurality of the isolation tanks; and a fixing portion, the fixing portion being connected to the supporting portion and used to be connected to the sealing assembly.

[0010] Optionally, the first sub-sealing assembly includes a sealing connection part and a plurality of sealing covers, wherein the plurality of sealing covers are fixedly mounted on the sealing connection part, and the plurality of sealing covers correspond one-to-one to a plurality of isolation tanks respectively, and the sealing connection part is used to be fixedly connected to the fixed part when the sealing cover seals the digestion tank.

[0011] Optionally, the pressurized wet digestion device also includes a fixing part, the fixing part is arranged at both ends of the supporting part, and the multiple isolation tanks are arranged at intervals along the length direction of the supporting part. The fixing part is provided with a fixing hole suitable for the fixing part to pass through, and the fixing part is connected to the sealing connection part through the fixing hole.

[0012] According to the pressurized wet digestion device of the embodiment of the present invention, the digestion tank is placed in the isolation tank of the isolation assembly, and the isolation tank can be detachably placed in the heating element. In this way, when the digestion tank needs to be cooled after the high-temperature wet digestion reaction, the isolation tank and the digestion tank inside it can be taken out from the heating element, thereby improving the heat dissipation efficiency of the digestion tank and improving the wet digestion efficiency of the pressurized wet digestion device. In addition, the digestion tank and the isolation tank are provided with an anti-expansion structure, which can achieve axial limitation of the digestion tank to prevent the digestion tank from expanding in the up and down directions due to heat and deforming, thereby avoiding the digestion tank from being easily broken due to deformation, and can also improve the service life of the digestion tank and reduce the use cost of the pressurized wet digestion device. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic structural diagram of a pressurized wet digestion device according to an embodiment of the present invention from an angle;

[0014] Figure 2 is a schematic structural diagram of a pressurized wet digestion device according to another angle of an embodiment of the present invention;

[0015] Figure 3 yes Figure 2 Sectional view along line AA;

[0016] Figure 4 is a partial structural schematic diagram of a pressurized wet digestion device according to another embodiment of the present invention;

[0017] Figure 5 is a schematic structural diagram of a pressurized wet digestion device according to another embodiment of the present invention in which an isolation tank and a sealing cover of a sealing assembly are separately arranged;

[0018] Figure 6 yes Figure 5 Sectional view along line BB;

[0019] Figure 7 is a schematic structural diagram from an angle of an isolation component of a pressurized wet digestion device according to an embodiment of the present invention;

[0020] Figure 8 is a structural schematic diagram from another angle of the isolation component of the pressurized wet digestion device according to an embodiment of the present invention;

[0021] Fig. 9 is a structural schematic diagram from another angle of the isolation component of the pressurized wet digestion device according to an embodiment of the present invention;

[0022] Fig.10 is a schematic structural diagram of an isolation tank of a pressurized wet digestion device according to an embodiment of the present invention;

[0023] Fig.11 yes Fig.10 Sectional view along line CC;

[0024] Fig.12 is a schematic structural diagram of a heating element of a pressurized wet digestion device according to an embodiment of the present invention;

[0025] Fig.13 4 is a partial cross-sectional view of a pressurized wet digestion device according to an embodiment of the present invention.

[0026] Reference numerals:

[0027] 100: pressurized wet digestion device;

[0028] 1: Digestion tank;

[0029] 2: first sub-isolation assembly, 21: isolation tank, 22: isolation chamber, 23: support portion, 24: fixing portion, 241: support step, 242: pre-positioning portion, 243a: fixing hole, 243b: positioning hole, 25: fixing member, 251: connecting shaft, 252: first connecting portion, 253: second connecting portion, 26: positioning stopper;

[0030] 3: heating element, 31: heating chamber;

[0031] 4: first sub-sealing assembly, 41: sealing cover, 42: sealing connection part;

[0032] 5: anti-expansion structure, 51: first limiting structure, 52: second limiting structure. DETAILED DESCRIPTION

[0033] The pressurized wet digestion device 100 proposed by the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0034] The pressurized wet digestion device 100 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0035] Combination Figure 1-Figure 12 As shown, the pressurized wet digestion device 100 according to an embodiment of the present invention may include a plurality of digestion tanks 1, an isolation assembly, a heating element 3 and a sealing assembly.

[0036] The digestion tank 1 is formed as a cavity with an open top, which is used to accommodate a digestion sample and a digestion solution. The digestion sample can undergo a wet digestion reaction in the digestion tank 1. A plurality of digestion tanks 1 can be installed on an isolation assembly. The isolation assembly includes a plurality of isolation tanks 21. The isolation tanks 21 are formed with isolation chambers 22 suitable for accommodating the digestion tanks 1. The plurality of digestion tanks 1 can be placed one by one in the plurality of isolation chambers 22. Specifically, the tops of the isolation chambers 22 are open so that the digestion tank 1 can be placed in the isolation chambers 22 from the top. The shape of the isolation chambers 22 is adapted to the shape of the digestion tank 1, thereby facilitating heat transfer between the isolation chambers 22 and the digestion tank 1, and the digestion tank 1 can fit tightly with the isolation chambers 22. In this way, when the digestion tank 1 is heated, not only can the expansion and deformation of the digestion tank 1 be limited, but the isolation chambers 22 can also transfer heat to the digestion tank 1. Combined with Figure 1-Figure 11 As shown, the shape of the isolation tank 21 can be substantially the same as that of the digestion tank 1 , for example, both can be formed into a hollow cylindrical shape with a closed bottom.

[0037] The heating element 3 is formed with a plurality of heating chambers 31 suitable for accommodating the isolation tank 21. The plurality of isolation tanks 21 are placed one by one in the plurality of heating chambers 31. During the wet digestion process, the heating element 3 is used to heat the digestion tank 1. Specifically, the heating element 3 generates heat, the temperature of the heating chamber 31 rises, and the heat is transferred to the digestion tank 1 through the isolation tank 21, and is transferred to the digestion sample and digestion liquid to be reacted in the digestion tank 1, so that the wet digestion reaction can be carried out at a high temperature. Moreover, there are a plurality of heating chambers 31, so that the heating element 3 can heat a plurality of heating elements 3 at the same time to improve the digestion efficiency of the pressurized wet digestion device 100.

[0038] The isolation tank 21 can be detachably arranged in the heating chamber 31, that is, the isolation tank 21 can be placed in the heating chamber 31, and can also be separated from the heating chamber 31. In this way, when the wet digestion reaction is carried out at a high temperature, the isolation tank 21 is placed in the heating chamber 31 to achieve heating of the digestion tank 1. When the temperature is lowered after the wet digestion reaction, there is a large amount of residual heat in the heating element 3, and the isolation tank 21 is separated from the heating chamber 31, which is conducive to the heat dissipation of the digestion tank 1. The isolation tank 21 can be placed in the air for heat dissipation, or it can be cooled by a heat dissipation device, for example, by air cooling or water cooling, etc., so that the heat dissipation efficiency of the digestion tank 1 can be further improved, the wet digestion time of the digested sample can be reduced, and the wet digestion efficiency of the pressurized wet digestion device 100 can be improved.

[0039] The digestion tank 1 is detachably accommodated in the isolation chamber 22, that is, the digestion tank 1 can be placed in the isolation chamber 22, and can also be removed from the isolation chamber 22. In this way, when the digestion tank 1 is placed in the isolation chamber 22, the digestion tank 1 can be fixed through the isolation chamber 22, and it is also convenient to take out the digestion tank 1 after the wet digestion reaction, so as to take out the digestion sample in the digestion tank 1, or the digestion tank 1 can be removed from the isolation chamber 22 after the heat is dissipated to a certain extent, so as to further improve the heat dissipation efficiency of the digestion tank 1.

[0040] When the digestion tank 1 performs a wet digestion reaction at high temperature, due to the properties of its own material, the digestion tank 1 is easily expanded by heat, which causes the length of the isolation tank 21 to increase in its axial direction by heat expansion. An anti-expansion structure 5 is formed on the isolation tank 21 and the digestion tank 1 for limiting the thermal expansion of the digestion tank 1 in the up and down directions (i.e., the axial direction of the digestion tank 1). The anti-expansion structure 5 can limit the expansion growth of the digestion tank 1 in the up and down directions by heating. Specifically, the anti-expansion structure 5 can fix the digestion tank 1 and the isolation tank 21 in the axial direction of the digestion tank 1. In this way, when the digestion tank 1 expands by heat, due to the limiting effect of the anti-expansion structure 5, the digestion tank 1 cannot expand upward, thereby avoiding the side wall of the digestion tank 1 from becoming thinner and easily breaking due to the expansion of the digestion tank 1, and can also reduce the deformation of the digestion tank 1 and increase the service life of the digestion tank 1.

[0041] The sealing component is used to seal the digestion tank 1. The sealing component can seal multiple digestion tanks 1 at the same time, so that the wet digestion process in the digestion tank 1 can be carried out under conditions higher than normal pressure. The specific structure of the sealing component can be set according to actual needs, and it only needs to seal the opening of the digestion tank 1.

[0042] Thus, according to the pressurized wet digestion device 100 of the embodiment of the present invention, the digestion tank 1 is placed in the isolation tank 21 of the isolation assembly, and the isolation tank 21 can be detachably placed in the heating element 3. In this way, when the digestion tank 1 needs to be cooled after the high-temperature wet digestion reaction, the isolation tank 21 and the digestion tank 1 therein can be taken out from the heating element 3, thereby improving the heat dissipation efficiency of the digestion tank 1 and improving the wet digestion efficiency of the pressurized wet digestion device 100. In addition, the digestion tank 1 and the isolation tank 21 are provided with an anti-expansion structure 5, and the anti-expansion structure 5 can achieve axial limitation of the digestion tank 1 to prevent the digestion tank 1 from expanding in the up and down directions due to heat and deforming, thereby avoiding the digestion tank 1 from being easily broken due to deformation, and can also improve the service life of the digestion tank 1 and reduce the use cost of the pressurized wet digestion device 100.

[0043] The following describes the working process of the pressurized wet digestion device 100 according to the embodiment of the present invention. Specifically, the sample and the digestion solution are placed in the digestion tank 1, and the digestion tank 1 is placed in the isolation tank 21 of the isolation component. The digestion is then sealed by the sealing component, wherein the sealing component can be connected and fixed with the isolation component to seal the digestion tank 1, so that the sealing component, the isolation component and the digestion tank 1 can form a whole. Finally, the isolation component, the digestion tank 1, etc. are placed together in the heating chamber 31 of the heating element 3, and the isolation tank 21 and the digestion tank 1 are heated by the heating element 3. The heat The heating element 3, the isolation tank 21 and the digestion tank 1 are transferred in sequence. After the heating is completed, the isolation component, the sealing component and the digestion tank 1 can be taken out as a whole, so that the isolation component and the digestion tank 1 can be separated from the heating element 3 for heat dissipation. Compared with the heating element 3, the isolation tank 21 has a smaller heat storage capacity and a relatively large heat dissipation area, thereby accelerating the heat dissipation efficiency of the digestion tank 1. After the heat is dissipated to a certain temperature or a certain time, the sealing component and the digestion tank 1 can be separated from the isolation component to take the digestion tank 1 out of the isolation tank 21, thereby greatly reducing the heat dissipation time of the digestion tank 1 and improving the heat dissipation efficiency.

[0044] For the heating element 3, Fig.12 As shown, the heating element 3 may be formed into a plate-like structure, and the heating cavity 31 is formed in the heating element 3 and extends along the thickness direction of the heating element 3. Figure 1-Figure 9 As shown, the isolation tank 21 forms a cylindrical structure and is suitable for being placed in the heating chamber 31; optionally, the isolation tank 21 can be formed as a metal part, and further the isolation tank 21 and the heating element 3 can be made of the same material, thereby facilitating heat transfer between the isolation tank 21 and the heating element 3.

[0045] In some embodiments of the present invention, Figure 3 , Figure 6 , Figure 7-Figure 11 As shown, the anti-expansion structure 5 includes a first limiting structure 51 formed on the digestion tank 1 and a second limiting structure 52 formed in the isolation chamber 22. The first limiting structure 51 stops at the lower surface of the second limiting structure 52 to prevent the digestion tank 1 from expanding and extending upward due to heat. In other words, the anti-expansion structure 5 may include a first limiting structure 51 and a second limiting structure 52. The first limiting structure 51 is formed on the outer surface of the digestion tank 1, and the second limiting structure 52 is formed on the inner wall surface of the isolation chamber 22. When the digestion tank 1 is placed in the isolation chamber 22, the first limiting structure 51 stops at the lower surface of the second limiting structure 52. In this way, the digestion tank 1 can be limited in the upper and lower directions by the cooperation of the second limiting structure 52 and the first limiting structure 51, so as to prevent the digestion tank 1 from expanding and extending upward due to heat, so as to limit the thermal expansion of the digestion tank 1.

[0046] In some examples of the present invention, Figure 6-Figure 11As shown, the anti-expansion structure 5 is formed as a threaded structure, the first limiting structure 51 is formed as a first thread on the surface of the digestion tank 1, and the second limiting structure 52 is formed on the inner wall of the isolation chamber 22 and is suitable for cooperating with the first thread. Therefore, when the digestion tank 1 is placed in the isolation chamber 22, the first thread is threadedly connected to the second thread, which can not only limit the thermal expansion of the digestion tank 1 in the axial direction, but also fix the digestion tank 1 in the isolation chamber 22, and increase the heat transfer area between the digestion tank 1 and the isolation tank 21.

[0047] In some embodiments of the present invention, Figure 6-Figure 7 as well as Fig. 9 and Fig.11 As shown, the anti-expansion structure 5 is formed on the upper part of the digestion tank 1 and the isolation chamber 22. When the digestion tank 1 is heated and expanded, the upper part of the digestion tank 1, that is, the part adjacent to the opening, is usually easy to expand and the wall thickness of the digestion tank 1 becomes thinner, which is easy to break. The anti-expansion structure 5 is formed on the upper part of the digestion tank 1, which can better avoid the breakage of the digestion tank 1 due to expansion, and can also simplify the structure of the digestion tank 1. Figure 6 In the example shown, the anti-expansion structure 5 is formed as a threaded structure, which is formed on the upper portion of the digestion tank 1 and adjacent to the top opening of the digestion tank 1 .

[0048] In some embodiments of the present invention, the isolation assembly may include multiple first sub-isolation assemblies 2, each first sub-isolation assembly 2 includes at least one isolation tank 21. In other words, each first sub-isolation assembly 2 may include one isolation tank 21 or multiple isolation tanks 21. The sealing assembly includes multiple first sub-sealing assemblies 4, each first sub-sealing assembly 4 includes at least one sealing cover 41 for sealing the digestion tank 1. The sealing covers 41 of the first sub-sealing assemblies 4 are respectively arranged in a one-to-one correspondence with the isolation tanks 21 of the first sub-isolation assemblies 2. The first sub-sealing assembly 4 is used to seal the digestion tank 1 in the first sub-isolation assembly 2. In this way, the isolation assembly and the sealing assembly include multiple sub-components, and the multiple first sub-isolation assemblies 2 and the multiple first sub-sealing assemblies 4 are matched one-to-one, which not only facilitates the connection between the sealing assembly and the isolation assembly, but also facilitates the alignment, assembly and sealing of the sealing assembly with the isolation assembly and the multiple digestion tanks 1.

[0049] In a specific example of the present invention, each first sub-isolation assembly 2 includes a plurality of isolation tanks 21, and the first sub-isolation assembly 2 also includes a support portion 23 and a fixing portion 24. The support portion 23 is connected to the outer wall surface of the plurality of isolation tanks 21, and the fixing portion 24 is connected to the support portion 23 for connecting to the sealing assembly. In this way, the support portion 23 can connect and support the plurality of isolation tanks 21, so that the plurality of isolation tanks 21 can be integrated into one, so as to facilitate the movement and placement of the plurality of isolation tanks 21 and to be separated from the heating chamber 31. The fixing portion 24 is connected to the sealing assembly. After the sealing assembly seals the opening of the digestion tank 1, the sealing assembly can be fixed to the fixing portion 24 to improve the sealing effect. Optionally, the support portion 23, the fixing portion 24 and the plurality of isolation tanks 21 can be integrally formed.

[0050] The arrangement of the plurality of isolation tanks 21 may correspond to the position of the heating chamber 31 on the heating element 3. For example, the plurality of isolation tanks 21 of the first sub-isolation assembly 2 are arranged in a row, and the plurality of isolation tanks 21 may correspond to the plurality of heating chambers 31 arranged in a row or column on the heating element 3. The plurality of sealing covers 41 of the first sub-sealing assembly 4 are arranged one-to-one correspondingly to the plurality of isolation tanks 21. After the first sub-isolation assembly 2 is sealed and connected with the first sub-sealing assembly 4, it is placed in the heating chamber 31 for heating.

[0051] Specifically, the first sub-sealing assembly 4 includes a sealing connection portion 42 and a plurality of sealing covers 41. The plurality of sealing covers 41 are fixed on the sealing connection portion 42. The plurality of sealing covers 41 correspond one-to-one to the plurality of isolation tanks 21 respectively. The sealing connection portion 42 connects the plurality of sealing covers 41 to connect and support the plurality of sealing covers 41. When the first sub-sealing assembly 4 is sealed with the first sub-isolation assembly 2, the plurality of sealing covers 41 are respectively sealed with the digestion tanks 1 in the plurality of isolation tanks 21. The sealing connection portion 42 is fixedly connected to the fixing portion 24, thereby enabling the first sub-sealing assembly 4 to be sealed with the first sub-isolation assembly 2.

[0052] like Figure 1-Figure 4 As shown, the pressurized wet digestion device 100 also includes a fixing member 25, a fixing part 24 is arranged at both ends of the support part 23, and a plurality of digestion tanks 1 are arranged spaced apart along the length direction of the support part 23. The fixing part 24 is provided with a fixing hole 243a suitable for the fixing member 25 to pass through, and the fixing hole 243a penetrates the fixing part 24. The fixing member 25 passes through the fixing hole 243a and is connected to the sealing connection part 42. The fixing member 25 can fix the fixing part 24 to the sealing connection part 42, and the structure is simple and convenient for fixed connection. Figure 1-Figure 4 as well as Figure 7-Figure 9 As shown, the sealing connection part 42 can be formed in a plate shape and can be placed between the two fixing parts 24. The two fixing parts 24 are formed with a support step 241 on one side facing each other. The sealing connection part 42 can be supported on the support step 241. There can be multiple fixing holes 243a, for example, Figure 7-Figure 9As shown, two fixing holes 243a may be extended in the horizontal direction.

[0053] like Fig.13 As shown, the pressurized wet digestion device 100 also includes a positioning stopper 26, the fixing portion 24 is provided with a positioning hole 243b, the positioning hole 243b extends in the up-down direction and is communicated with the fixing hole 243a, the fixing member 25 includes a connecting shaft 251 passing through the fixing hole 243a and connected to the sealing connecting portion 42, and a fixing seat connected to the connecting shaft 251, when the fixing member 25 is inserted into the fixing hole 243a, the fixing seat is located on the outside of the fixing portion 24, the connecting shaft 251 includes a first connecting portion 252 and a second connecting portion 253 connected to each other, the first connecting portion 252 is suitable for passing through the fixing hole 243a and connecting to the sealing connecting portion 42, the first connecting portion 252 and the second connecting portion 253 have different radii and are coaxially arranged, and the first connecting portion 252 and the second connecting portion 253 have different radii and are coaxially arranged. The radius of the second connection part 253 is smaller than the radius of the first connection part 252, so that a positioning step can be formed at the connection between the first connection part 252 and the second connection part 253. When the first connection part 252 passes through the fixing hole 243a and is connected to the sealing connection part 42, the connection between the first connection part 252 and the second connection part 253 is located in the direction toward the outside of the fixing part 42 and does not exceed the positioning hole 243b. In other words, when the positioning stopper 26 extends into the positioning hole 243b, it stops at the second connection part 253. The positioning step is located on one side of the positioning stopper 26. The positioning stopper 36 can prevent the fixing part 25 from detaching outward from the fixing hole 243a, so as to improve the fixing effect of the sealing connection 42 and the fixing part 24.

[0054] Furthermore, a pre-positioning portion 242 may be provided on the support step 241. The pre-positioning portion 242 may be formed on a positioning column vertically arranged on the support step 241. The sealing connection portion 42 is provided with a pre-positioning hole corresponding to the pre-positioning portion 242. The pre-positioning portion 242 and the pre-positioning hole can realize the pre-positioning installation of the sealing connection portion 42 and the fixing portion 24.

[0055] Of course, it is understandable that, for example Figure 5-Figure 6 As shown, each isolation tank 21 can also be set up separately, and the multiple isolation tanks 21 are not connected to each other. The sealing assembly includes multiple sealing covers 41, and each sealing cover 41 is respectively connected to each isolation tank 21 to seal the digestion tank 1 therein. After the sealing cover 41 is sealed and connected to the isolation tank 21, it can be directly placed in the heating chamber 31.

[0056] The above are only preferred embodiments of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A pressurized wet digestion device, characterized in that: include: Multiple digestion tanks; An isolation assembly, wherein the isolation assembly comprises a plurality of isolation tanks, wherein the isolation tanks are formed with an isolation cavity suitable for accommodating the digestion tanks, wherein the digestion tanks are detachably accommodated in the isolation cavity, wherein the isolation tanks and the digestion tanks are formed with anti-expansion structures for limiting the thermal expansion of the digestion tanks in the up and down directions, wherein the anti-expansion structures are formed at the upper parts of the digestion tanks and the isolation cavity, wherein the anti-expansion structures comprise a first limiting structure formed on the digestion tanks and a second limiting structure formed in the isolation cavity, wherein the first limiting structure is formed on the outer surface of the digestion tanks, and the second limiting structure is formed on the inner wall surface of the isolation cavity, wherein the first limiting structure abuts against the lower surface of the second limiting structure to prevent the digestion tanks from expanding and extending upward due to the heat; A heating element, wherein the heating element is a plate-shaped structure, wherein a plurality of heating cavities suitable for accommodating the isolation tank are formed in the heating element, wherein the heating cavities extend along the thickness direction of the heating element, and the isolation tank is detachably arranged in the heating cavities; A sealing assembly is used to seal the digestion tank.

2. The pressurized wet digestion device according to claim 1, characterized in that: The anti-expansion structure is formed as a threaded structure, the first limiting structure is a first thread formed on the surface of the digestion tank, and the second limiting structure is a second thread formed on the inner wall of the isolation chamber and suitable for cooperating with the first thread.

3. The pressurized wet digestion device according to claim 1, characterized in that: The isolation assembly includes a plurality of first sub-isolation assemblies, each of which includes at least one isolation tank; the sealing assembly includes a plurality of first sub-sealing assemblies, each of which includes at least one sealing cover for sealing the digestion tank, and the sealing cover corresponds one-to-one to the isolation tank of the first sub-isolation assembly.

4. The pressurized wet digestion device according to claim 3, characterized in that: Each of the first isolation sub-assemblies includes a plurality of isolation tanks, and the first isolation sub-assembly further includes: A support portion, the support portion being connected to the outer wall surface of the plurality of isolation tanks; A fixing portion, the fixing portion is connected to the supporting portion and is used to be connected to the sealing assembly.

5. The pressurized wet digestion device according to claim 4, characterized in that: The first sub-sealing assembly includes a sealing connection part and a plurality of sealing covers, wherein the plurality of sealing covers are fixedly mounted on the sealing connection part, and the plurality of sealing covers correspond one by one to the plurality of isolation tanks respectively, and the sealing connection part is used to be fixedly connected to the fixing part when the sealing cover seals the digestion tank.

6. The pressurized wet digestion device according to claim 5, characterized in that: It also includes a fixing part, which is arranged at both ends of the supporting part. A plurality of isolation tanks are arranged at intervals along the length direction of the supporting part. The fixing part is provided with a fixing hole suitable for the fixing part to pass through. The fixing part passes through the fixing hole and is connected to the sealing connection part.

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