Microwave digestion device for mineral analysis

Abstract

The utility model discloses a microwave digestion device for mineral analysis, and relates to the technical field of mineral detection. The digestion instrument is technically characterized by comprising a digestion instrument body, wherein a power connector is arranged at the bottom of an inner cavity of the digestion instrument body; two sliding rails are symmetrically installed in an inner cavity of the digestion instrument body in the width direction of the digestion instrument body, a supporting frame is arranged between the two sliding rails, and two guide protrusions on the supporting frame are inserted into notches of the two sliding rails respectively. A digestion tank frame is placed on the supporting frame, a connecting driving piece is arranged on the digestion tank frame, and the digestion tank frame is detachably connected with the power connector through the connecting driving piece. According to the digestion tank rack, taking and placing work of a plurality of digestion tanks can be completed at the same time through the digestion tank rack, so that convenience and test efficiency during taking and placing of the digestion tanks can be greatly improved, the digestion tank rack can be stably moved in and out through the sliding rail in the taking and placing process, and the risk that solutions in the digestion tanks are spilled due to collision can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mineral detection, and particularly relates to a microwave digestion device for mineral analysis. BACKGROUND

[0002] The microwave digestion method is a modern sample pretreatment technology, which uses microwave energy to rapidly and effectively decompose samples and is widely used in chemical analysis. The principle is to heat the sample and the reaction reagent to a high-temperature and high-pressure environment through microwave radiation, accelerate the chemical reaction in a sealed container, and completely decompose the organic matter and inorganic matter in the sample into a soluble or measurable form to provide a sample solution for subsequent analysis.

[0003] The microwave digestion instrument is a commonly used device in the microwave digestion method. When analyzing the genesis and composition of minerals in geology, the microwave digestion instrument is often used to prepare mineral analysis samples. Compared with the traditional multi-hole digester or digestion stove preparation method, the microwave digestion instrument can quickly destroy the rock structure, release and separate the metal elements and mineral components therein, and improve the analysis efficiency and accuracy. The general process of using the existing microwave digestion instrument is as follows: weighing the sample, putting an appropriate amount of sample into a special digestion tank; then adding concentrated nitric acid, hydrochloric acid, hydrofluoric acid and other suitable acid digestion agents into the digestion tank; then sealing the sample and the digestion agent in the digestion tank, placing the digestion tank on the digestion tank placing rack in the instrument, setting the appropriate temperature and time, and then starting the digestion.

[0004] However, the common digestion tank placing rack is fixed in the device, and the test personnel need to put the digestion tank into the corresponding placing hole of the digestion tank placing rack or take it out one by one when putting in or taking out the sample, which is not convenient to operate. Moreover, due to the limited space inside the device, the digestion tank taking and placing process is prone to knocking and causing the solution in the digestion tank to spill out, which causes unnecessary harm to the test personnel. CONTENT OF THE INVENTION

[0005] The present application provides a microwave digestion device for mineral analysis, which can facilitate the test personnel to take and place the digestion tank and effectively reduce the risk of knocking the digestion tank during the taking and placing process.

[0006] The above object of the present application is achieved by the following technical scheme:

[0007] The utility model provides a microwave digestion device for mineral analysis, including the digestion instrument body, the bottom of the inner chamber of digestion instrument body is equipped with a power connector, the power connector is connected with the motor output shaft of the bottom of digestion instrument body, the cross section of power connector is regular polygon, the middle position of the inner chamber of digestion instrument body is installed two slide rails along its width direction symmetry, the mutual side of two slide rails is equipped with a notch, be equipped with a horizontal support frame between two slide rails, the both outer sides of support frame along the width direction of the inner chamber of digestion instrument body are equipped with a guide boss, two guide bosses are inserted in the notch of two slide rails respectively, and the guide boss is connected with the slide rail notch of corresponding position all slidingly, the support frame is placed with digestion tank frame, the digestion tank frame can place multiple digestion tanks simultaneously when using, be equipped with connecting drive part on the digestion tank frame, the digestion tank frame is detachable with power connector through connecting drive part and is connected together.

[0008] Further, the digestion tank frame includes two circular placement plates spaced apart in the vertical direction and parallel to each other, the upper circular placement plate is uniformly provided with a plurality of first insertion holes, the lower circular placement plate is provided with a second insertion hole at a position corresponding to the plurality of first insertion holes, the diameters of the first insertion holes and the second insertion hole are equal to the outer diameter of the digestion tank, but the lower end of the second insertion hole does not penetrate the lower circular placement plate; the edges of the two circular placement plates are fixedly connected together by a plurality of connecting columns, and the connecting drive part is installed at the center of the two circular placement plates.

[0009] Further, the diameter of the upper circular placement plate in the digestion tank frame is greater than the diameter of the lower circular placement plate, and the distance between the bottom of the second insertion hole and the top of the first insertion hole is greater than half the height of the digestion tank.

[0010] Further, the support frame includes a circular ring-shaped support portion, a positioning step is provided on the inner side of the circular ring-shaped support portion in the circumferential direction, the diameter of the outer circle on the positioning step is equal to the diameter of the upper circular placement plate in the digestion tank frame, and the diameter of the inner circle on the positioning step is not less than the diameter of the lower circular placement plate in the digestion tank frame; a door-shaped support portion is provided on the side of the circular ring-shaped support portion close to the back plate of the digestion instrument body, the circular ring-shaped support portion is embedded in the opening end of the door-shaped support portion and is welded together, and the two guide bosses are also fixedly provided on the door-shaped support portion.

[0011] Furthermore, the connecting drive component includes a central sleeve that penetrates vertically through the center of the two circular placement plates in the digestion tank rack, and the central sleeve is fixedly connected to both circular placement plates. The cross-section of the through hole on the inner side of the central sleeve is a regular polygon, and an inner bushing is inserted into the through hole in the central sleeve. The cross-section of the outer contour of the inner bushing is a regular polygon that matches the cross-section of the through hole on the inner side of the central sleeve, and the cross-section of the through hole inside the inner bushing is a regular polygon that matches the cross-section of the power connector.

[0012] Furthermore, an externally threaded post is fixedly connected to the top of the inner bushing, and a knob is threaded onto the externally threaded post, the diameter of which is larger than the outer diameter of the central sleeve.

[0013] Furthermore, two handles are symmetrically installed on the circular placement plate located at the top of the digestion tank rack.

[0014] Furthermore, a guide groove is provided on the upper side of the guide protrusion along its length direction. There is a gap between the end of the guide groove near the back plate of the digester body and the end of the guide protrusion near the back plate of the digester body. A limiting block with the same cross-sectional shape as the guide groove is integrally formed at the front end of the slide rail slot corresponding to the guide protrusion.

[0015] In summary, this application includes at least one of the following beneficial technical effects:

[0016] This application features a support frame within the digester body that can slide freely in and out along a slide rail. A digester rack for holding the digestion vessels is placed on this support frame, and the digester rack is detachably connected to the power connector within the digester body via a connecting drive component. When the digestion vessels need to be removed, the operator can disconnect the connecting drive component and the power connector to release the restriction between them. Then, the digester rack can be pulled directly out of the digester body's interior cavity via the support frame. This provides sufficient operating space on the digester rack, allowing the operator to lift the rack directly from the support frame for further processing. This method allows for the simultaneous removal of multiple digestion vessels. Similarly, when the experimenter needs to place a digestion vessel into the digester body, the entire digestion vessel rack with the vessel inside is placed on the support frame. Then, the entire digestion vessel rack is pushed into the digester cavity along the slide rail. Finally, it is connected to the power head on the digester body via the connecting drive component, thus completing the placement of multiple digestion vessels simultaneously. Compared to existing technologies, this method not only greatly improves the efficiency of placing and removing digestion vessels, but also ensures that the vessels are smoothly moved in and out via the slide rail during both placement and removal. This significantly reduces the risk of internal solution spillage due to collisions between the digestion vessels and the equipment. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this application;

[0019] Figure 2 This is a schematic diagram showing the state after the digestion tank rack of this application has been lifted as a whole from the support frame;

[0020] Figure 3 This is a schematic diagram showing the state of the digestion tank rack after it has been disassembled.

[0021] Figure 4 This is a schematic diagram showing the state of the support frame and slide rails after disassembly.

[0022] Figure 5 yes Figure 4 A magnified structural diagram of point A in the middle.

[0023] Reference numerals: 1. Digester body; 2. Power connector; 3. Slide rail; 4. Support frame; 41. Circular support; 42. Positioning step; 43. Gate-shaped support; 5. Guide protrusion; 6. Digestion tank rack; 61. Circular placement plate; 62. First insertion hole; 63. Second insertion hole; 64. Connecting post; 7. Connecting drive component; 71. Central sleeve; 72. Inner bushing; 8. External threaded post; 9. Knob; 10. Pick-up and drop handle; 11. Guide groove; 12. Limiting block. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are also within the scope of protection of this application.

[0025] like Figure 1 and Figure 2As shown, this application discloses a microwave digestion device for mineral analysis, comprising a digester body 1. A power connector 2 is located at the bottom of the inner cavity of the digester body 1, connected to the motor output shaft at the bottom of the digester body 1. The cross-section of the power connector 2 is a regular polygon. Two slide rails 3 are symmetrically installed along the width direction at the middle position of the inner cavity of the digester body 1, with a slot on each side of the two slide rails 3 that are close to each other. A horizontal support frame 4 is provided between the two slide rails 3. A guide protrusion 5 is provided on each of the two outer side walls of the support frame 4 along the width direction of the inner cavity of the digester body 1. The two guide protrusions 5 are respectively inserted into the slots of the two slide rails 3, and the guide protrusions 5 are slidably connected to the corresponding slots of the slide rails 3. A digestion tank rack 6 is placed on the support frame 4. Multiple digestion tanks can be placed on the digestion tank rack 6 during use. A connecting drive component 7 is provided on the digestion tank rack 6, and the digestion tank rack 6 is detachably connected to the power connector 2 through the connecting drive component 7.

[0026] In the above embodiments, the frame inside the existing microwave digester for placing the digestion vessels is usually directly and fixedly connected to the output end of the motor at the bottom of the microwave digester. Because of this, during use, the operator must place the multiple prepared digestion vessels one by one into the placement holes on the frame, then close the cabinet door, and start the equipment. The motor at the bottom of the microwave digester will drive the entire frame, along with the multiple digestion vessels, to rotate (similar to the turntable in a traditional microwave oven), ensuring that the microwaves and heat within the microwave digester evenly process the samples inside the digestion vessels. After processing, the operator needs to open the cabinet door and remove the digestion vessels one by one from the frame for cooling. This method is obviously very inconvenient. In addition, due to the limited internal space of the microwave digester (in order to ensure that the sample inside the digestion vessel is heated evenly), it is difficult for the experimenter to insert the digestion vessel vertically into the placement hole on the frame when taking it out. Furthermore, the microwave digester also obstructs the experimenter's view, which makes it easy for the digestion vessel to be bumped or shaken when taking it out, causing the acidic digesting agent and other solutions inside to spill out and cause unnecessary injury to the experimenter.

[0027] This application provides a support frame 4 within the digester body 1, which can slide freely in and out along the slide rail 3. A digestion vessel rack 6, used to hold digestion vessels, is placed on the support frame 4. The digestion vessel rack 6 is detachably connected to the power connector 2 in the digester body 1 via a connecting drive component 7. When a digestion vessel needs to be removed, the operator can disconnect the connecting drive component 7 and the power connector 2 to release the restriction between them. Then, the entire digestion vessel rack 6 can be pulled out of the inner cavity of the digester body 1 directly through the support frame 4. This provides sufficient operating space on the digestion vessel rack 6, allowing the operator to lift the rack 6 directly from the support frame 4 to simultaneously remove multiple digestion vessels. Similarly, when the operator needs to place a digestion vessel inside the digester body 1, the entire digestion vessel with the digestion vessel inside can be placed directly into the digester body 1. The digestion vessel rack 6 is placed on the support frame 4, and then the digestion vessel rack 6 is pushed into the digester cavity along the slide rail 3. It is then connected to the power head on the digester body 1 via the connecting drive component 7, thus completing the placement of multiple digestion vessels simultaneously. Compared with the existing technology, since multiple digestion vessels can be placed and removed simultaneously through the digestion vessel rack 6, the convenience of placing and removing digestion vessels and the efficiency of the experiment can be greatly improved. In addition, during the process of placing and removing digestion vessels, they are smoothly brought in and out by the slide rail 3. Moreover, when placing multiple digestion vessels on or removing multiple digestion vessels from the support frame 4 at the same time, the operation is carried out outside the digester body 1. This not only provides the experimenter with a good field of vision but also a larger operating space, which can greatly reduce the risk of internal solution spillage due to collision between the digestion vessels and the equipment.

[0028] Furthermore, such as Figures 1-3 As shown, the digestion tank rack 6 includes two circular placement plates 61 that are spaced apart vertically and parallel to each other. The upper circular placement plate 61 has a plurality of through first insertion holes 62 evenly distributed on it. The lower circular placement plate 61 has a second insertion hole 63 at a position corresponding to the plurality of first insertion holes 62. The diameter of the second insertion hole 63 is equal to the diameter of the first insertion hole 62 and the outer diameter of the digestion tank, but the lower end of the second insertion hole 63 does not penetrate the lower circular placement plate 61. The edges of the two circular placement plates 61 are fixedly connected together by a plurality of connecting posts 64, and the connecting drive component 7 is installed at the center of the two circular placement plates 61.

[0029] In the above embodiment, the two circular placement plates 61 are fixedly connected together by multiple connecting posts 64, thus forming a stable integrated structure. The through first insertion hole 62 on the upper circular placement plate 61 facilitates the insertion of the digestion vessel by the test personnel. The second insertion hole 63 on the lower circular placement plate 61, corresponding to the first insertion hole 62, facilitates the support of the bottom of the digestion vessel inserted from the first insertion hole 62, so that it is placed stably in the two circular placement plates 61. The connecting drive 7 for connecting with the power connector 2 is set at the center of the two circular placement plates 61. In this way, when the power connector 2 rotates, it can drive the two circular placement plates 61 to rotate smoothly and at a uniform speed with all the digestion vessels placed on them.

[0030] Furthermore, the diameter of the upper circular placement plate 61 in the digestion vessel rack 6 is larger than the diameter of the lower circular placement plate 61, and the distance between the bottom of the second insertion hole 63 and the top of the first insertion hole 62 is greater than half the height of the digestion vessel.

[0031] In the above embodiments, the diameter of the upper circular placement plate 61 in the digestion vessel rack 6 is larger than the diameter of the lower circular placement plate 61. This allows the lower circular placement plate 61 to pass smoothly through the support frame 4 when the digestion vessel rack 6 is placed on the support frame 4, while the upper circular placement plate 61 secures the entire rack to the support frame 4. In this application, the distance between the bottom of the second insertion hole 63 and the top of the first insertion hole 62 is greater than half the height of the digestion vessel. Therefore, when the digestion vessel is inserted into the digestion vessel rack 6, more than half of the vessel's height is embedded in the rack, significantly improving the stability of the digestion vessel after it is placed on the rack 6.

[0032] Furthermore, such as Figures 1-4 As shown, the support frame 4 includes an annular support part 41. The inner side of the annular support part 41 is provided with a positioning step 42 along the circumference. The diameter of the outer circle of the positioning step 42 is equal to the diameter of the circular placement plate 61 above the digestion tank rack 6. The diameter of the inner circle of the positioning step 42 is not less than the diameter of the circular placement plate 61 below the digestion tank rack 6. The annular support part 41 is provided with a gate-shaped support part 43 on the side near the back plate of the digester body 1. The annular support part 41 is embedded in the opening end of the gate-shaped support part 43 and the two are welded together. The two guide protrusions 5 are also fixed on the gate-shaped support part 43.

[0033] In the above embodiments, the positioning step 42 on the inner circumferential side of the annular support 41 of this application, arranged in the manner described above, ensures that the circular placement plate 61 below the digestion vessel rack 6 can smoothly pass through the annular support 41 when the digestion vessel rack 6 is placed on the annular support 41. The lower end of the larger diameter circular placement plate 61 on the upper part of the digestion vessel rack 6 is stuck in the positioning step 42 of the annular support. On the one hand, the positioning step 42 can position the digestion vessel rack 6, making it convenient for the test personnel to quickly place the digestion vessel rack 6 in place, and after being placed in place, the digestion vessel rack 6 will not easily shake in the horizontal direction. On the other hand, the positioning step 42 can provide a certain guiding surface for the digestion vessel rack 6 when it rotates with the power connector 2, so that it can rotate smoothly around the axis of the power connector 2 in the positioning step 42 of the annular support 41. In practical use, to reduce frictional loss between the digester rack 6 and the positioning step 42, some balls or rollers can be evenly added circumferentially on the positioning step 42. This converts the sliding friction between them into rolling friction, thereby reducing frictional loss and rotational resistance. The portal-shaped support part 43 of this application mainly provides an installation base for the annular support part 41, and provides the necessary support force for the normal use of the annular support part 41 from the slide rail 3 through the guide protrusions 5 on both sides.

[0034] Furthermore, such as Figures 1-3 As shown, the connecting drive component 7 includes a central sleeve 71, which penetrates vertically through the center of two circular placement plates 61 in the digestion tank rack 6, and the central sleeve 71 is fixedly connected to both circular placement plates 61. The cross-section of the through hole on the inner side of the central sleeve 71 is a regular polygon, and an inner bushing 72 is inserted into the through hole in the central sleeve 71. The cross-section of the outer contour of the inner bushing 72 is a regular polygon that matches the cross-section of the through hole on the inner side of the central sleeve 71, and the cross-section of the through hole inside the inner bushing 72 is a regular polygon that matches the cross-section of the power connector 2.

[0035] In the above embodiments, after the digestion vessel rack 6 is sent into the digester body 1 along the slide rail 3, the tester can insert the inner bushing 72 along the central sleeve 71. The inner bushing 72 slides down along the through hole inside the central sleeve 71 until the lower end of the inner bushing 72 is fitted onto the power connector 2. This completes the connection between the digestion vessel rack 6 and the power connector 2. Since the cross-sectional shape of the outer contour of the inner bushing 72 is the same as the cross-sectional shape of the through hole inside the central sleeve 71, and the cross-sectional shape of the through hole inside the inner bushing 72 is the same as the cross-sectional shape of the power connector 2, and the rotation speed of the digestion vessel rack 6 is generally two revolutions per minute, the weight of the sample and digesting agent in the digestion vessel is at most tens of grams. After the motor at the bottom of the digester body 1 is started, the torque it receives will not be particularly large. Because it is a low-speed rotation, the situation where the inner bushing 72 disengages from the power connector 2 during rotation is almost non-existent. In this way, the power connector 2 can drive the digestion vessel rack 6 to rotate smoothly on the support frame 4 through the inner bushing 72.

[0036] Furthermore, such as Figure 2 and Figure 3 As shown, an external threaded post 8 is fixedly connected to the top of the inner sleeve 72, and a knob 9 is threadedly connected to the external threaded post 8, and the diameter of the knob 9 is larger than the outer diameter of the central sleeve 71.

[0037] In the above embodiments, after completing the microwave digestion of the sample in the digestion vessel, when it is necessary to disassemble the power connector 2 and the inner bushing 72, the tester can increase the distance between the knob 9 and the upper end of the external threaded column 8 by turning the knob 9 on the external threaded column 8. Since the diameter (outer diameter) of the knob 9 is larger than the outer diameter of the central sleeve 71, the length of the external threaded column 8 located above the central sleeve 71 will increase (since the diameter of the knob is larger than the outer diameter of the central sleeve, it is convenient for the tester to quickly grasp the knob when turning it, and based on the lever principle, it is easier for the tester to turn the knob). Correspondingly, the bottom of the inner bushing 72 connected to the lower end of the external threaded column 8 will move up and gradually move away from the power connector 2, thereby achieving the effect of disassembling the inner bushing 72 and the power connector 2, so that the tester can easily remove the digestion vessel rack 6 from the digestion instrument body 1. Similarly, when the tester places the digestion vessel rack 6 containing the new sample into the digestion instrument body 1, the tester can slowly lower the inner bushing 72 by turning the knob 9. Since the lowering speed of the inner bushing 72 is controllable during this process, the tester can make timely adjustments when he finds that there is a slight deviation between the position of the inner bushing 72 and the power connector 2.

[0038] Furthermore, such as Figure 1 and Figure 3 As shown, two handles 10 are symmetrically installed on the circular placement plate 61 located at the top of the digestion tank rack 6.

[0039] In the above embodiments, the handle 10 provided on the upper circular placement plate 61 of the digestion vessel rack 6 not only facilitates the test personnel to quickly pick up or put down the entire digestion vessel rack 6 from the support frame 4, but also provides the test personnel with a convenient grip when taking the digestion vessel rack 6 out of or into the inner cavity of the digestion instrument body 1.

[0040] Furthermore, such as Figure 4 and Figure 5 As shown, a guide groove 11 is provided on the upper side of the guide protrusion 5 along its length direction. There is a gap between the end of the guide groove 11 near the back plate of the digester body 1 and the end of the guide protrusion 5 near the back plate of the digester body 1. A limiting block 12 with the same cross-sectional shape as the guide groove 11 is integrally formed at the front end of the slot of the slide rail 3 corresponding to the guide protrusion 5.

[0041] In the above embodiments, when the tester pulls the support frame 4 out of the digester body 1, since there is a gap between the end of the guide groove 11 near the back plate of the digester body 1 and the end of the guide protrusion 5 on the corresponding side, the limiting block 12 with the same cross-sectional shape as the front end of the slide rail 3 slot and the guide groove 11 can restrict the entire support frame 4 from continuing to move when it moves to the end of the guide groove 11, thereby preventing the entire support frame 4 from detaching from the slide rail 3. In addition, after the support frame 4 is pulled out of the digester body 1, since it still maintains a sufficient contact area with the slide rail 3, it can effectively ensure that the support frame 4 is still in a horizontal state when it is outside the digester body 1.

[0042] The implementation principle of this embodiment is as follows: After placing all the prepared digestion vessels on the digestion vessel rack 6, the experimenter can push the entire digestion vessel rack 6 into the digester body 1 along the slide rail 3 using the handles 10 on the rack. The inner bushing 72 is then slowly lowered along the central sleeve 71. Once the lower end of the inner bushing 72 is fitted onto the power connector 2 at the bottom of the digester body 1, the furnace door can be closed and the program started to begin microwave heating treatment of the sample inside the digestion vessel. After the program ends, the experimenter opens the furnace door, puts on gloves, and disassembles the inner bushing 72 and the power connector 2. Using the handles 10 on the digestion vessel rack 6, the experimenter pulls the digestion vessel rack 6 and the support frame 4 out of the digester body along the slide rail 3. Then, holding the two handles 10 on the rack 6 with both hands, the experimenter removes the entire digestion vessel rack 6 from the support frame 4 and moves it to a designated area for cooling. Once cooled, the acid removal operation can then be performed. Compared to existing technologies, this application can simultaneously handle the placement and removal of multiple digestion vessels via the digestion vessel rack 6, thus greatly improving the convenience and efficiency of digestion vessel handling. Furthermore, the process of placing and removing digestion vessels is smoothly carried in and out by the slide rail 3. When placing multiple digestion vessels onto or removing them from the support frame 4, the operation is performed outside the digestion apparatus body 1. This provides the test personnel with a good field of vision and more operating space, which greatly reduces the risk of internal solution spillage due to collisions between the digestion vessels and the equipment.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A microwave digestion apparatus for mineral analysis, comprising a digester body (1), characterized in that: The digester body (1) has a power connector (2) at the bottom of its inner cavity. The power connector (2) is connected to the motor output shaft at the bottom of the digester body (1). The cross-section of the power connector (2) is a regular polygon. Two slide rails (3) are symmetrically installed in the middle of the inner cavity of the digester body (1) along its width direction. Each of the two slide rails (3) has a slot on its adjacent side. A horizontal support frame (4) is provided between the two slide rails (3). Each of the two outer side walls of the support frame (4) along the width direction of the inner cavity of the digester body (1) has a guide protrusion (5). The two guide protrusions (5) are respectively inserted into the slots of the two slide rails (3), and the guide protrusions (5) are slidably connected to the slots of the corresponding slide rails (3). The support frame (4) is provided with a digestion tank rack (6). The digestion tank rack (6) can hold multiple digestion tanks at the same time during use. The digestion tank rack (6) is provided with a connecting drive component (7). The digestion tank rack (6) is detachably connected to the power connector (2) through the connecting drive component (7).

2. The microwave digestion apparatus for mineral analysis according to claim 1, characterized in that: The digestion tank rack (6) includes two circular placement plates (61) arranged vertically and parallel to each other. The upper circular placement plate (61) is evenly provided with a plurality of through first insertion holes (62). The lower circular placement plate (61) is provided with a second insertion hole (63) at a position corresponding to the plurality of first insertion holes (62). The diameter of the second insertion hole (63) and the diameter of the first insertion hole (62) are both equal to the outer diameter of the digestion tank, but the lower end of the second insertion hole (63) does not penetrate the lower circular placement plate (61). The edges of the two circular placement plates (61) are fixedly connected together by a plurality of connecting columns (64). The connecting drive (7) is installed at the center of the two circular placement plates (61).

3. The microwave digestion apparatus for mineral analysis according to claim 2, characterized in that: The diameter of the upper circular placement plate (61) in the digestion tank rack (6) is greater than the diameter of the lower circular placement plate (61), and the distance between the bottom of the second insertion hole (63) and the top of the first insertion hole (62) is greater than half the height of the digestion tank.

4. The microwave digestion apparatus for mineral analysis according to claim 3, characterized in that: The support frame (4) includes an annular support part (41). The inner side of the annular support part (41) is provided with a positioning step (42) along the circumferential direction. The diameter of the outer circle of the positioning step (42) is equal to the diameter of the circular placement plate (61) above the digestion tank rack (6). The diameter of the inner circle of the positioning step (42) is not less than the diameter of the circular placement plate (61) below the digestion tank rack (6). The annular support part (41) is provided with a gate-shaped support part (43) on the side near the back plate of the digester body (1). The annular support part (41) is embedded in the opening end of the gate-shaped support part (43) and the two are welded together. The two guide protrusions (5) are also fixed on the gate-shaped support part (43).

5. The microwave digestion apparatus for mineral analysis according to any one of claims 2 to 4, characterized in that: The connecting drive component (7) includes a central sleeve (71), which penetrates the center of the two circular placement plates (61) in the digestion tank rack (6) in a vertical direction, and the central sleeve (71) is fixedly connected to the two circular placement plates (61). The cross-section of the through hole inside the central sleeve (71) is a regular polygon. An inner bushing (72) is inserted in the through hole inside the central sleeve (71). The cross-section of the outer contour of the inner bushing (72) is a regular polygon that matches the cross-section of the through hole inside the central sleeve (71). The cross-section of the through hole inside the inner bushing (72) is a regular polygon that matches the cross-section of the power connector (2).

6. The microwave digestion apparatus for mineral analysis according to claim 5, characterized in that: The top of the inner bushing (72) is fixedly connected to an external threaded post (8), and a knob (9) is threaded onto the external threaded post (8), and the diameter of the knob (9) is greater than the outer diameter of the central sleeve (71).

7. The microwave digestion apparatus for mineral analysis according to any one of claims 2 to 4, characterized in that: Two handles (10) are symmetrically installed on the circular placement plate (61) located at the top of the digestion tank rack (6).

8. The microwave digestion apparatus for mineral analysis according to any one of claims 1 to 4, characterized in that: The upper side of the guide protrusion (5) is provided with a guide groove (11) along its length direction. There is a gap between the guide groove (11) near the back plate of the digester body (1) and the guide protrusion (5) near the back plate of the digester body (1). The front end of the groove of the slide rail (3) corresponding to the guide protrusion (5) is integrally formed with a limiting block (12) with the same cross-sectional shape as the guide groove (11).

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