Batch processing device for vacuum concentration

Abstract

The invention relates to a batch processing device for vacuum concentration, which comprises a supporting mechanism, a centrifugal motor, a rotating sample rack, a sealing cover plate and a driving device, and the rotating sample rack is provided with a plurality of sample grooves; a rotating shaft of the centrifugal motor is connected with the circle center of the rotating sample rack to drive the rotating sample rack and the sample tube to rotate and centrifuge; a driving device is arranged on the supporting mechanism and detachably connected with the sealing cover plate through a telescopic rod to drive the sealing cover plate to ascend and descend. A plurality of butt joints are arranged on the lower surface of the sealing cover plate and used for being in butt joint with sample tube openings, hollow air channels are formed in the sealing cover plate, the bottom of each air channel corresponds to one butt joint, the tops of the air channels are converged to a main connector in the top of the sealing cover plate, and during vacuum concentration, a vacuum pump is connected with the main connector to vacuumize all sample tubes; a heating control device is arranged in the rotating sample frame, at least two heating plates are arranged in the sample groove and used for heating the sample tube, and the heating control device is connected with the heating plates and controls the heating temperature.

Description

Technical Field

[0001] This invention belongs to the field of vacuum concentration technology, and specifically relates to a batch processing device for vacuum concentration. Background Technology

[0002] In routine laboratory operations, the concentration of liquid or liquid-solid samples is typically achieved using a rotary evaporator. The sample vial is immersed in a water bath at a specific temperature, while a vacuum pump simultaneously creates a vacuum. In this low-pressure environment, the boiling point of the sample solution decreases, allowing it to reach boiling point at a lower temperature, thus evaporating the solvent. However, rotary evaporators are expensive and can only process one sample at a time, resulting in low efficiency and failing to meet the requirements for multi-sample vacuum concentration in laboratories. Summary of the Invention

[0003] To address the aforementioned problems, this invention provides a batch processing device for vacuum concentration, comprising a support mechanism, a centrifugal motor, a rotating sample rack, a sealing cover, and a driving device. The rotating sample rack is provided with several sample slots for placing sample tubes. The rotating shaft of the centrifugal motor is connected to the center of the rotating sample rack and is used to drive the rotating sample rack and sample tubes to rotate and centrifuge.

[0004] A drive device is installed on the support mechanism. The drive device is detachably connected to the sealing cover plate via a telescopic rod, which drives the sealing cover plate to rise and fall. The lower surface of the sealing cover plate is provided with several connectors for connecting to the sample tube openings. The sealing cover plate has hollow air channels inside. The bottom of each air channel corresponds to a connector. The top of the air channels converges to the main interface at the top of the sealing cover plate. When vacuum concentration is performed, the vacuum pump is connected to the main interface through an air pipe to evacuate each sample tube.

[0005] The rotating sample holder is equipped with a heating control device inside. The sample slot is equipped with at least two heating plates for heating the sample tube. The heating control device is connected to the heating plates and controls the heating temperature.

[0006] Optionally, the support mechanism includes a base plate and a first support frame and a second support frame on the base plate. The first support frame is mounted on the periphery of the second support frame, and the two are concentrically arranged. The first support frame includes a horizontally arranged first support plate and several vertical first support rods. The two ends of the first support rods are respectively connected to the first support plate and the base plate. A driving device is provided on the first support plate.

[0007] The second support frame includes a horizontally arranged second support plate and several vertical second support rods. The two ends of the second support rods are connected to the second support plate and the base plate, respectively. A centrifugal motor is installed below the second support plate, and a rotating sample rack is installed on the second support plate.

[0008] Alternatively, the first support plate is provided with a hollowed-out groove, through which the telescopic rod of the drive device passes and is connected to the sealing cover plate below. The drive device can move along the groove and offset from the center position of the sealing cover plate.

[0009] Further optionally, the second support plate is circular, and four limiting blocks are provided on the upper surface of the second support plate. The four limiting blocks are evenly arranged along the circumference of the second support plate and are all located on the edge of the second support plate. The limiting blocks are integrally formed with the second support plate.

[0010] The second support plate has a vertical through hole in the center of the symmetrical limiting blocks on both sides. A vertical guide rod passes through the through hole, and the two ends of the guide rod are connected to the lower surface of the first support plate and the bottom plate, respectively. The guide rod also passes through the edge of the sealing cover plate. The other two limiting blocks have a vertical blind hole in the center, which is used to receive the positioning rod of the sealing cover plate, so as to keep the verticality of the sealing cover plate when it is lowered and accurately position the rotating sample holder.

[0011] Optionally, the sealing cover is circular and includes an outer fixed part and an inner rotating part, which are concentrically arranged. The fixed part is annular and the rotating part is circular. The outer edge of the rotating part is slidably connected to the inner edge of the fixed part.

[0012] The guide rail rods pass through the fixing part, allowing the sealing cover to rise and fall along the two guide rail rods. The fixing part is provided with a positioning rod at the position of the two blind holes corresponding to the second support plate. When the sealing cover is lowered onto the rotating sample holder, the positioning rod can be inserted into the corresponding blind hole and cooperate with the two guide rail rods to enable the sealing cover to accurately position the rotating sample holder.

[0013] Further optionally, the connectors are all located on the lower surface of the rotating part and correspond one-to-one with several sample slots of the rotating sample holder; all air passages are located inside the rotating part, and the main interface is located at the center of the upper surface of the rotating part.

[0014] The main interface protrudes upwards and can be detachably connected to the bottom of the telescopic rod or the bottom of the vacuum tube via a snap or thread. This allows the sealing cover to be connected to the drive device for lifting and lowering, or switched to connect to the vacuum pump to evacuate the sample tube through the air passage and connector.

[0015] Optionally, the connector protrudes downwards and is integrally formed with the rotating part. A flexible sealing cap can be fitted onto the lower middle part of the connector. The sealing cap is made of rubber and is fitted onto the outer side wall of the connector at the top and facing downwards at the bottom. It can be fitted onto the open end of the sample tube, thereby achieving a sealed connection between the internal space of the sample tube and the air passage of the rotating part.

[0016] Further optionally, a positioning hole is provided at a corresponding position on the upper surface of the fixed part and the upper surface of the rotating part, and the two positioning holes are a pair, with the line connecting the pair of positioning holes distributed radially along the sealing cover plate; a U-shaped buckle is used to buckle upside down, with one end inserted into the positioning hole of the fixed part and the other end inserted into the positioning hole of the rotating part, so as to temporarily fix the relative position of the rotating part and the fixed part.

[0017] Optionally, the suction pipe includes an upper fixed pipe and a lower rotating pipe. The rotating pipe is hollow inside and has a detachable connection interface at the bottom. The top is rotatably connected to the bottom of the fixed pipe through a rotary sealing joint. The upper part of the fixed pipe is solid, and the lower part is hollow. The side of the hollow part of the fixed pipe is provided with a suction interface for connecting a vacuum pump. The upper part of the fixed pipe can pass through the slot in the center of the first support plate, making the rotation of the sealing cover plate more stable.

[0018] Optionally, the upper part of the rotating sample holder is cylindrical and the lower part is an inverted frustum shape, and the upper and lower parts are concentrically arranged; the upper part has several cylindrical sample slots that are evenly arranged around the upper part of the rotating sample holder, and the top of the sample slots is open.

[0019] Several heating plates are evenly arranged around the circumference of the sample cell. The back of the heating plates is connected to the inner wall of the sample cell by several evenly arranged springs. A heating and temperature control device is located in the center of the upper part of the rotating sample holder. This device is connected to each heating plate by wires to control the heating of the sample tube by the heating plate. Attached Figure Description

[0020] Figure 1 A schematic diagram (I) of a batch processing device for vacuum concentration.

[0021] Figure 2 A schematic diagram (II) of a batch processing device for vacuum concentration.

[0022] Figure 3 This is a schematic diagram showing the rotation of the top surface of the sample holder;

[0023] Figure 4 This is a schematic diagram of the sealing cover.

[0024] Figure 5 A schematic diagram of the bottom surface of the sealing cover;

[0025] Figure 6 This is a schematic diagram of the air extraction pipe.

[0026] Among them, 1-centrifugal motor, 2-rotating sample rack, 3-sealing cover plate, 4-drive device, 5-sample slot, 6-telescopic rod, 7-connector, 8-main interface, 9-rotating tube, 10-heating plate, 11-spring, 12-base plate, 13-first support plate, 14-second support plate, 15-first support rod, 16-second support rod, 17-empty slot, 18-limiting block, 19-guide rail rod, 20-blind hole, 21-positioning rod, 22-fixed part, 23-rotating part, 24-fixed tube. Detailed Implementation

[0027] This embodiment provides a batch processing device for vacuum concentration, such as... Figures 1-6 As shown, it includes a support mechanism, a centrifugal motor 1, a rotating sample rack 2, a sealing cover plate 3, and a driving device 4. The rotating sample rack 2 is provided with several sample slots 5 for placing sample tubes. The rotating shaft of the centrifugal motor 1 is connected to the center of the rotating sample rack 2 and is used to drive the rotating sample rack 2 and the sample tubes to rotate and centrifuge.

[0028] A drive device 4 is installed on the support mechanism. The drive device 4 is detachably connected to the sealing cover plate 3 via a telescopic rod 6, which drives the sealing cover plate 3 to rise and fall. The lower surface of the sealing cover plate 3 is provided with several connectors 7 for connecting to the sample tube openings. The sealing cover plate 3 has hollow air channels inside. The bottom of each air channel corresponds to a connector 7. The top of the air channels converges to the main interface 8 at the top of the sealing cover plate 3. When vacuum concentration is performed, the vacuum pump is connected to the main interface 8 through the air pipe to evacuate each sample tube.

[0029] The rotating sample holder 2 is equipped with a heating control device inside, and the sample slot 5 is equipped with at least two heating plates 10 for heating the sample tube. The heating control device is connected to the heating plates 10 and controls the heating temperature.

[0030] Optionally, the support mechanism includes a base plate 12 and a first support frame and a second support frame on the base plate 12. The first support frame is mounted on the periphery of the second support frame, and the two are concentrically arranged. The first support frame includes a horizontally arranged first support plate 13 and several vertical first support rods 15. The two ends of the first support rods 15 are respectively connected to the first support plate 13 and the base plate 12. A driving device 4 is provided on the first support plate 13.

[0031] The second support frame includes a horizontally arranged second support plate 14 and several vertical second support rods 16. The two ends of the second support rods 16 are respectively connected to the second support plate 14 and the base plate 12. A centrifugal motor 1 is provided below the second support plate 14, and a rotating sample rack 2 is provided on the second support plate 14.

[0032] Further optionally, the first support plate 13 is square or round, and a plurality of first support rods 15 are evenly arranged along the circumference of the first support plate 13. All the first support rods 15 are located on the periphery of the second support rods 16. The first support plate 13 is located above the rotating sample holder 2, and the first support rods 15 fix and support the first support plate 13.

[0033] The first support plate 13 has a hollowed-out groove 17. The telescopic rod 6 of the drive device 4 passes through the hollow groove 17 and is then connected to the sealing cover plate 3 below. The drive device 4 can move along the hollow groove 17 and offset the center position of the sealing cover plate 3.

[0034] In one specific embodiment, the slot 17 is in the shape of a straight line, with one end of the slot 17 located at the center of the first support plate 13, and the other end being free to move. The upper surface of the first support plate 13 is provided with auxiliary support components, such as railings located on both sides of the slot 17. The railings are arranged along the length of the slot 17, and the two railings can support the two sides of the drive device 4. The drive device 4 can be moved manually, or the drive device 4 can be slidably connected to the two railings, and the drive device 4 can be pushed to move along the railings.

[0035] Further optionally, the second support plate 14 is circular, and four limiting blocks 18 are provided on the upper surface of the second support plate 14. The four limiting blocks 18 are evenly arranged along the circumference of the second support plate 14 and are all located on the edge of the second support plate 14. The limiting blocks 18 are integrally formed with the second support plate 14.

[0036] The second support plate 14 has a vertical through hole at the center of the symmetrical limiting blocks 18 on both sides. A vertical guide rod 19 is inserted through the through hole. The two ends of the guide rod 19 are connected to the lower surface of the first support plate 13 and the bottom plate 12, respectively. The guide rod 19 also passes through the edge of the sealing cover plate 3. The other two limiting blocks 18 have a vertical blind hole 20 at the center, which is used to receive the positioning rod 21 of the sealing cover plate 3, so as to keep the verticality of the sealing cover plate 3 when it is lowered and accurately position the rotating sample holder 2.

[0037] More preferably, the limiting block 18 is a cuboid and the through hole is a cylinder.

[0038] Alternatively, several second support rods 16 are evenly arranged along the circumference of the second support plate 14, and the second support rods 16 fix and support the second support plate 14; the bottom of the centrifugal motor 1 is mounted on the base plate 12, the shaft of the centrifugal motor 1 is vertically upward and passes through the center of the second support plate 14, and is then connected to the center of the bottom of the rotating sample holder 2 so as to drive the rotating sample holder 2 to rotate; the bottom of the rotating sample holder 2 is rotatably connected to the upper surface of the second support plate 14.

[0039] Optionally, the sealing cover 3 is circular and includes an outer fixing part 22 and an inner rotating part 23, which are concentrically arranged. The fixing part 22 is annular and the rotating part 23 is circular. The outer edge of the rotating part 23 is slidably connected to the inner edge of the fixing part 22, so that the rotating part 23 can rotate independently while the fixing part 22 does not rotate.

[0040] The guide rod 19 passes through the fixing part 22, so that the sealing cover plate 3 can move up and down along the two guide rods 19. The fixing part 22 is provided with a positioning rod 21 corresponding to the position of the two blind holes 20 of the second support plate 14. The positioning rod 21 is vertically downward, with its top fixedly connected to the lower surface of the fixing part 22 and its bottom pointing to the corresponding blind hole 20. When the sealing cover plate 3 is lowered onto the rotating sample holder 2, the positioning rod 21 can be inserted into the corresponding blind hole 20 and cooperate with the two guide rods 19 to enable the sealing cover plate 3 to accurately position the rotating sample holder 2.

[0041] Further optionally, the cross-sectional area of ​​the rotating part 23 is not less than the cross-sectional area of ​​the rotating sample holder 2, and the rotating part 23 corresponds vertically to the rotating sample holder 2; all the connecting joints 7 are located on the lower surface of the rotating part 23 and correspond one-to-one with several sample slots 5 of the rotating sample holder 2; all the air passages are located inside the rotating part 23, and the main interface 8 is located at the center of the upper surface of the rotating part 23.

[0042] Further optionally, several connectors 7 are evenly distributed along the circumference of the rotating sample holder 2. One end of the air channel is connected to the top of the corresponding connector 7, and the other end converges at the center inside the rotating part 23, and then connects to the main interface 8 through the upward-extending main air channel; each air channel is radially distributed inside the rotating part 23.

[0043] The main interface 8 protrudes upward and can be detachably connected to the bottom of the telescopic rod 6 or the bottom of the vacuum tube via a snap or thread, so that the sealing cover 3 can be connected to the drive device 4 to achieve lifting and lowering, and can also be switched to connect to the vacuum pump to evacuate the sample tube through the air passage and connector 7.

[0044] Optionally, the connector 7 protrudes downwards and is integrally formed with the rotating part 23. A flexible sealing cap can be fitted onto the lower middle part of the connector 7. The sealing cap is made of rubber and is fitted onto the outer side wall of the connector 7 at the top and facing downwards at the bottom. It can be fitted onto the open end of the sample tube, thereby achieving a sealed connection between the internal space of the sample tube and the air passage of the rotating part 23.

[0045] To further improve airtightness, after the sealing cap is attached to the sample tube, a binding or ring clamp can be installed on the outside of the sealing cap on the outside of the sample tube opening to lock the sealing cap in place.

[0046] Optionally, a positioning hole is provided at a corresponding position on the upper surface of the fixing part 22 and the upper surface of the rotating part 23. Two positioning holes form a pair, and the line connecting the pair of positioning holes is distributed radially along the sealing cover plate 3. When it is necessary to temporarily fix the relative position of the rotating part 23 and the fixing part 22, a U-shaped buckle is used, upside down (with the vertical ends facing down), with one end inserted into the positioning hole of the fixing part 22 and the other end inserted into the positioning hole of the rotating part 23, to temporarily fix the relative position of the rotating part 23 and the fixing part 22. At least two pairs of the above-mentioned positioning holes are provided on the sealing cover plate 3, and are symmetrically arranged with the center of the sealing cover plate 3 as the center.

[0047] In use, each sample tube is filled with sample solution. After the sample tube is placed into the sample slot 5 of the rotating sample holder 2, the relative positions of the rotating part 23 and the fixed part 22 are fixed with U-shaped buckles. The drive device 4 is located at the center of the first support plate 13, and the telescopic rod 6 is connected to the main interface 8. The drive device 4 leads the sealing cover 3 down along the guide rail 19 until the positioning rod 21 of the fixed part 22 is inserted into the corresponding blind hole 20, ensuring that the sealing cover 3 moves vertically downward and can be positioned. The sealing cover has been pre-installed on the connector 7. The sealing cover 3 descends to the position where the bottom of the sealing cover contacts the sample tube opening and stops descending. The centrifugal motor 1 drives the rotating sample holder 2 to rotate slightly, so that the sample tube opening corresponds one-to-one with the sealing cover. The drive device 4 controls the sealing cover 3 to descend a small distance, so that the sealing cover is fastened to the outside of the tube opening, realizing the sealed communication between the internal space of the sample tube and the air passage of the rotating part 23. Then the U-shaped buckles are removed to release the binding between the fixed part 22 and the rotating part 23.

[0048] Optionally, the suction pipe includes an upper fixed pipe 24 and a lower rotating pipe 9. The rotating pipe 9 is hollow inside and has a detachable connection interface 8 at the bottom. The top is rotatably connected to the bottom of the fixed pipe 24 through a rotary sealing joint. The upper part of the fixed pipe 24 is solid, and the lower part is hollow. The side of the hollow part of the fixed pipe 24 is provided with a suction interface for connecting a vacuum pump. The upper part of the fixed pipe 24 can pass through the slot 17 at the center of the first support plate 13, making the rotation of the sealing cover plate 3 more stable.

[0049] After the drive device 4 controls the connector 7 of the sealing cover 3 to align with the sample tube, the connection between the telescopic rod 6 and the main interface 8 is removed. The drive device 4 retracts the telescopic rod 6, moving the drive device 4 along the slot 17 away from the center of the first support plate 13. The bottom of the suction tube passes through the slot 17 in the center of the first support plate 13 and extends downwards until the bottom end of the rotating tube 9 is connected to the main interface 8 (sealed with sealing tape or sealing ring to prevent air leakage). The part of the fixed tube 24 above the first support plate 13 has a support block. The support block and the fixed tube 24 can be integrally formed. When the rotating tube 9 is connected to the main interface 8, the bottom of the support block abuts against the upper surface of the first support plate 13, thereby temporarily fixing the suction tube. A gas tube is connected between the vacuum pump and the suction interface.

[0050] The rotating sample holder 2 and the rotating part 23 are fastened together by the connector 7, and together with several sample tubes, they form a rotating whole. The sample tubes, connector 7, gas channel, main interface 8 and rotating tube 9 form a complete closed gas path system that is relatively stationary. When evacuating, only this gas path system with a small overall volume needs to be targeted, the vacuum level is easy to control, the load is small and the energy consumption is small.

[0051] After concentration begins, the centrifugal motor 1 drives the entire rotating assembly to rotate. Thus, the centrifugal motor 1 controls the rotation from below, while the vacuum tube at the top assists in the rotation, making the entire assembly more stable during rotation. The rotating tube 9 rotates with the rotating part 23, and the rotary sealing joint ensures the airtight connection between the fixed tube 24 and the rotating tube 9. The vacuum pump evacuates each sample tube through the rotating tube 9 and various air channels for vacuum concentration. The fixed tube 24 stably supports this rotating assembly.

[0052] Optionally, the upper part of the rotating sample holder 2 is cylindrical and the lower part is an inverted frustum shape, and the upper and lower parts are concentrically arranged; the several sample slots 5 in the upper part are cylindrical and are evenly arranged around the upper part of the rotating sample holder 2, and the top of the sample slots 5 is open.

[0053] Several heating plates 10 are evenly arranged inside the sample cell 5. The heating plates 10 are evenly arranged along the circumference of the sample cell 5. The front of the heating plate 10 faces the sample tube, and the back is connected to the inner wall of the sample cell 5 by several evenly arranged springs 11. The bottom of the heating plate 10 is supported on the bottom surface of the sample cell 5.

[0054] A heating and temperature control device is located at the center of the upper part of the rotating sample holder 2. This device is connected to each heating plate 10 in each sample slot 5 via wires, and controls the heating plate 10 to heat the sample tube.

[0055] The retractable heating plate 10 allows the sample slot 5 to accommodate sample tubes of different diameters. When the sample tube is inserted into the sample slot 5, the outer wall of the sample tube pushes the surrounding heating plates 10 outwards simultaneously. The spring 11 adapts to sample tubes of different diameters, resulting in varying amounts of contraction of the heating plates 10, which also clamp the sample tube. The heating and temperature control device has its own charging power supply (no need to connect to an external power source, and does not affect the rotation of the rotating sample holder 2). The corresponding wires extend inside the rotating sample holder 2 to control the heating temperature of the heating plates 10. The front of the heating plates 10 contacts the side wall of the sample tube, directly heating the sample tube. Combined with the form of the sample slot 5, this minimizes heat loss and improves thermal efficiency and temperature control accuracy.

[0056] Preferably, after the sample tube is inserted into the sample slot 5, a rubber sealing ring is fitted from the top of the sample tube to secure it. The lower part of the sealing ring is stuck between the outer wall of the sample tube and the inner wall of the sample slot 5, and the upper part of the sealing ring presses on the upper surface of the rotating sample holder 2. The sealing ring can also seal the sample slot 5 and play a role in heat preservation.

Claims

1. A batch processing apparatus for vacuum concentration, characterized in that, It includes a support mechanism, a centrifugal motor, a rotating sample rack, a sealing cover, and a drive device. The rotating sample rack has several sample slots for placing sample tubes. The shaft of the centrifugal motor is connected to the center of the rotating sample rack and is used to drive the rotating sample rack and sample tubes to rotate. A drive device is installed on the support mechanism. The drive device is detachably connected to the sealing cover plate via a telescopic rod, which drives the sealing cover plate to rise and fall. The lower surface of the sealing cover plate is provided with several connectors for connecting to the sample tube openings. The sealing cover plate has hollow air channels inside. The bottom of each air channel corresponds to a connector. The top of the air channels converges to the main interface at the top of the sealing cover plate. When vacuum concentration is performed, the vacuum pump is connected to the main interface through an air pipe to evacuate each sample tube. The rotating sample holder is equipped with a heating control device inside. The sample slot is equipped with at least two heating plates for heating the sample tube. The heating control device is connected to the heating plates and controls the heating temperature.

2. The batch processing apparatus according to claim 1, characterized in that, The support mechanism includes a base plate and a first support frame and a second support frame on the base plate. The first support frame is mounted on the periphery of the second support frame, and the two are concentrically arranged. The first support frame includes a horizontally arranged first support plate and several vertical first support rods. The two ends of the first support rods are respectively connected to the first support plate and the base plate. A driving device is provided on the first support plate. The second support frame includes a horizontally arranged second support plate and several vertical second support rods. The two ends of the second support rods are connected to the second support plate and the base plate, respectively. A centrifugal motor is installed below the second support plate, and a rotating sample rack is installed on the second support plate.

3. The batch processing apparatus according to claim 2, characterized in that, The first support plate has a hollow slot. The telescopic rod of the drive device passes through the slot and is connected to the sealing cover plate below. The drive device can move along the slot and offset the center position of the sealing cover plate.

4. The batch processing apparatus according to claim 2, characterized in that, The second support plate is circular, and four limiting blocks are provided on the upper surface of the second support plate. The four limiting blocks are evenly arranged along the circumference of the second support plate and are all located on the edge of the second support plate. The second support plate has a vertical through hole in the center of the symmetrical limiting blocks on both sides. A vertical guide rod passes through the through hole, and the two ends of the guide rod are connected to the lower surface of the first support plate and the bottom plate, respectively. The guide rod also passes through the edge of the sealing cover plate. The other two limiting blocks have a vertical blind hole in the center, which is used to receive the positioning rod of the sealing cover plate, so as to keep the verticality of the sealing cover plate when it is lowered and accurately position the rotating sample holder.

5. The batch processing apparatus according to claim 4, characterized in that, The sealing cover is circular and includes an outer fixed part and an inner rotating part, which are concentrically arranged. The fixed part is annular and the rotating part is circular. The outer edge of the rotating part is slidably connected to the inner edge of the fixed part. The guide rail rods pass through the fixing part, allowing the sealing cover to rise and fall along the two guide rail rods. The fixing part is provided with a positioning rod at the position of the two blind holes corresponding to the second support plate. When the sealing cover is lowered onto the rotating sample holder, the positioning rod can be inserted into the corresponding blind hole and cooperate with the two guide rail rods to enable the sealing cover to accurately position the rotating sample holder.

6. The batch processing apparatus according to claim 3, characterized in that, The connector corresponds one-to-one with several sample slots of the rotating sample holder; all air passages are located inside the rotating part, and the main interface is located at the center of the upper surface of the rotating part. The main interface protrudes upwards and can be detachably connected to the bottom of the telescopic rod or the bottom of the vacuum tube via a snap or thread. This allows the sealing cover to be connected to the drive device for lifting and lowering, or switched to connect to the vacuum pump to evacuate the sample tube through the air passage and connector.

7. The batch processing apparatus according to claim 1, characterized in that, The lower part of the connector can be fitted with a flexible sealing cap made of rubber. The top of the sealing cap is fitted onto the outer wall of the connector, and the bottom is facing down. It can be fitted onto the open end of the sample tube, thereby achieving a sealed connection between the internal space of the sample tube and the air passage of the rotating part.

8. The batch processing apparatus according to claim 5, characterized in that, A positioning hole is provided at the corresponding position on the upper surface of the fixed part and the upper surface of the rotating part. The two positioning holes are a pair, and the line connecting the pair of positioning holes is distributed along the radial direction of the sealing cover plate. A U-shaped buckle is used to buckle upside down, with one end inserted into the positioning hole of the fixed part and the other end inserted into the positioning hole of the rotating part, so as to temporarily fix the relative position of the rotating part and the fixed part.

9. The batch processing apparatus according to claim 6, characterized in that, The extraction pipe includes an upper fixed pipe and a lower rotating pipe. The rotating pipe is hollow inside and has a detachable connection interface at the bottom. The top is rotatably connected to the bottom of the fixed pipe through a rotary sealing joint. The upper part of the fixed pipe is solid, and the lower part is hollow. The side of the hollow part of the fixed pipe is provided with an extraction interface for connecting a vacuum pump. The upper part of the fixed pipe can pass through the slot in the center of the first support plate, making the rotation of the sealing cover plate more stable.

10. The batch processing apparatus according to claim 1, characterized in that, The upper part of the rotating sample holder is cylindrical, and the lower part is an inverted frustum shape, and the upper and lower parts are concentrically arranged; the upper part has several cylindrical sample slots, which are evenly arranged around the upper part of the rotating sample holder, and the top of the sample slots is open. Several heating plates are evenly arranged around the circumference of the sample cell. The back of the heating plates is connected to the inner wall of the sample cell by several evenly arranged springs. A heating and temperature control device is located in the center of the upper part of the rotating sample holder. This device is connected to each heating plate by wires to control the heating of the sample tube by the heating plate.

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