A high-pressure sampling device and method in lactitol production process

Abstract

The invention discloses a high-pressure sampling device and method in a lactitol production process, and relates to the technical field of lactitol production sampling. The device comprises a rotatable turntable mounted on a work frame, a servo motor is mounted on the work frame below the turntable, the servo motor is connected to the center of the turntable through a coupling, a plurality of reaction chambers distributed around the circumference of the upper surface of the turntable are arranged on the turntable, a plurality of liquid suction pipes inserted into the reaction chamber and used for overflowing the solution in the reaction chamber are arranged on the top of each reaction chamber, the plurality of liquid suction pipes are distributed in different areas of the reaction chamber, and mixed samples from different areas in the reaction chamber can be extracted by the plurality of liquid suction pipes distributed in different areas of the reaction chamber, a sampling device is arranged above the reaction chamber, the sampling device is mounted on a support plate located above the reaction chamber, and the support plate is connected to the work frame through a connecting rod. The device can reduce the influence of solution adhesion, and improve the reliability and accuracy of sample extraction and inspection results.

Description

Technical Field

[0001] The invention relates to the technical field of lactitol production sampling, and in particular to a high-pressure sampling device and a method thereof in a lactitol production process. Background Art

[0002] Lactitol is a disaccharide alcohol that can be produced by hydrogenating lactose (a naturally occurring sugar in dairy products). Therefore, during the hydrogenation stage, it is necessary to ensure that the lactose molecules are evenly distributed in the solution. This is beneficial for the effective contact between the catalyst and the lactose molecules and improves the efficiency of the hydrogenation reaction. Sampling during this process can help monitor the progress of the hydrogenation reaction and determine whether the reaction proceeds as expected. At the same time, by analyzing the lactose content and the amount of lactitol produced in the sample, it can be determined whether the reaction has been completed or whether the reaction conditions need to be adjusted.

[0003] However, there is a problem in this process that needs to be focused on and solved: since lactose dissolves in water, it will increase the concentration of the solution. This will cause the solution to easily adhere to the inner surface of the sampling pipe during the sampling test, further causing a mixing effect when subsequent samples are drawn, resulting in data deviations; therefore, it is necessary to adopt specific technical measures to ensure the reliability and accuracy of the results of multiple sampling. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a high-pressure sampling device and method in the lactitol production process, which can reduce the impact of solution adhesion phenomenon and improve the reliability and accuracy of sample extraction and inspection results.

[0005] To achieve the above object, the present invention provides the following technical solution: a high-pressure sampling device in the lactitol production process, comprising a rotatable turntable mounted on a work frame, a servo motor is mounted on the work frame below the turntable, and the servo motor is connected to the center of the turntable through a coupling to drive the turntable to rotate;

[0006] The turntable is provided with a plurality of reaction chambers distributed around the circumference of the upper surface of the turntable, and the top of each reaction chamber is provided with a plurality of pipettes inserted into the reaction chamber for overflowing the solution in the reaction chamber. The plurality of pipettes are distributed in different areas of the reaction chamber to extract mixed samples from different areas in the reaction chamber, so as to improve the accuracy of extracting the lactose hydrogenation reaction solution in the reaction chamber;

[0007] A sampling device is provided above the reaction chamber, and the sampling device is installed on a support plate located above the reaction chamber, and the support plate is connected to the work frame through a connecting rod.

[0008] Preferably, an electric telescopic rod is provided at the center of the reaction chamber, and the output end of the electric telescopic rod passes through the upper top wall of the reaction chamber and is connected to an overflow block installed inside the reaction chamber. The overflow block can be controlled to rise and fall in the reaction chamber through the electric telescopic rod. When the overflow block descends to the solution in the reaction chamber, due to the large volume of the overflow block, the solution in the reaction chamber rises to the liquid suction pipes in each area.

[0009] Preferably, the sampling device includes a cylinder installed at the center of the support plate, the output end of the cylinder extends to the bottom of the support plate and is connected to an electric wheel I installed below the support plate, two support rods with an angle of 90° are installed on the side of the electric wheel I, and each of the support rods is provided with an electric wheel II at one end away from the electric wheel I, and the side of the electric wheel II away from the support rod is connected to an L-shaped flip rod, the vertical section of the flip rod is provided with a positioning ring, and the positioning ring is provided with a plurality of sampling tubes corresponding to the positions of the liquid aspiration pipes on the reaction chamber.

[0010] Preferably, the electric wheel I and the electric wheel II are driven by motors installed on the cylinder output end and the support rod respectively, so that the electric wheel I rotates around the vertical center axis of the cylinder output end, and the electric wheel II rotates around the horizontal center axis of the support rod.

[0011] Preferably, a bushing is provided at the top of the fixed end of the electric telescopic rod located at the center of the reaction chamber, and a positioning shaft matching the position of the bushing is provided at the bottom of the positioning ring above the bushing. The positioning shaft can be inserted into the bushing so that the sampling tube can be accurately inserted into the liquid pipe at each corresponding position for sampling. A plurality of movable clamping blocks are distributed on the circumference of the top of the bushing for fixing the position of the positioning shaft inserted into the bushing, thereby improving the accuracy of positioning.

[0012] Preferably, two cleaning chambers are provided on the upper surface of the support plate, and the two cleaning chambers are respectively located directly above the two positioning rings. The two cleaning chambers respectively extend backblowing pipes corresponding to the positions and numbers of sampling tubes on each positioning ring toward the surface of the support plate facing the positioning rings. A mixed solution of gas and cleaning liquid in the cleaning chamber is sprayed out by the backblowing pipes under the action of the pump body in the cleaning chamber. Under the action of the electric wheel II, the flip rod drives the sampling tube to flip to a position facing the backblowing pipe, and then the backblowing pipe is inserted into the sampling tube by the action of the cylinder for backblowing cleaning, so as to ensure that the sampling tube is not affected by the residual detection solution when being tested again.

[0013] Preferably, the output end of the electric telescopic rod located in the reaction chamber is provided with a plurality of L-shaped support rods which are consistent with the position and number of the pipette pipe, the vertical section of the support rod is inserted into the pipette pipe at the corresponding position, and the top of the vertical section of each support rod is provided with two scrapers of different sizes, the scraper directly above one of the scrapers has a smaller diameter than the scraper below it, and the two scrapers are connected by a vertical rod, and a plurality of through holes are provided on the surfaces of the two scrapers. When the overflow block descends, the lactose solution passes through the through holes on the two scrapers and enters the pipette pipe. At this time, the sampling tube descends into the pipette pipe for sampling, and then the solution extracted by the sampling tube is transferred to the detection area. After the detection solution is transferred, the sampling tube is transferred by the electric wheel I to the position where the solution was extracted before, and the two scrapers scrape the inner wall of the sampling tube and the inner wall of the pipette pipe respectively under the action of the electric telescopic rod to prevent the lactose solution from adhering to the inner wall of the pipe and affecting the next detection.

[0014] Preferably, each of the pipette pipes is provided with a fixing ring on its upper surface outside the reaction chamber, and a rotatable closing cover is provided on the fixing ring for closing the upper surface of the pipette pipe in a non-sampling state to ensure the normal reaction of the lactose solution in the reaction chamber.

[0015] Preferably, a vacuum pump is provided on one side of each of the pipette pipes for sucking the air in the pipette pipes. Since the bottom of the pipette pipes extends into the solution and the top of the pipette pipes is engaged with the sampling tube, the gas in the pipette pipes can be reduced, thereby improving the ability of the pipette pipes to adsorb the solution in the reaction chamber.

[0016] A method for using a high-pressure sampling device in a lactitol production process comprises the following steps:

[0017] S101, start the electric telescopic rod to make the overflow block descend into the solution in the reaction chamber, the solution is immersed in the overflow block, so that the solution level rises to the liquid suction pipe, the vertical section of the support rod is inserted into the corresponding liquid suction pipe, the scraper is lowered with the support rod, the solution enters the liquid suction pipe through the through hole on the scraper, the sealing cover on the liquid suction pipe is opened to prepare for sampling, the vacuum pump starts to work, the gas amount in the liquid suction pipe is reduced, and the adsorption capacity of the solution is increased;

[0018] S102, driving the electric wheel I through the motor to rotate around the vertical center axis of the cylinder output end, adjusting the position of the sampling device, and the electric wheel II rotates around the horizontal center axis of the support rod to accurately position the sampling tube above the liquid pipette, and the cylinder pushes downward to make the sampling tube pass through the positioning ring and accurately insert into the liquid pipette, and the sampling tube extracts the reaction solution from the liquid pipette and transfers it to the detection area for analysis;

[0019] S103, after the detection solution is transferred, the sampling tube is again transferred by the electric rotating wheel I to the position where the solution was previously extracted, and the two scrapers scrape the inner wall of the sampling tube and the inner wall of the liquid pipe under the action of the electric telescopic rod, so as to prevent the lactose solution from adhering to the inner wall of the pipe and affecting the next detection, and at the same time, the residual lactose solution can be collected again into the reaction chamber to avoid waste;

[0020] S104. Finally, the cylinder is lifted, the sampling tube leaves the liquid suction pipe, and the electric wheel II rotates, driving the flip rod to flip the sampling tube to the cleaning position. The mixed solution in the cleaning chamber is sprayed through the backflush tube to clean the inner wall of the sampling tube. At this time, the other sampling tube can be rotated to the area to be sampled. The two sampling tubes cooperate with each other to improve the efficiency of sampling and cleaning.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The present invention arranges a plurality of reaction chambers on a turntable and installs a plurality of liquid pipettes on the top of each reaction chamber, so that mixed samples can be extracted from different areas of the reaction chamber, thereby improving the accuracy of extracting the lactose hydrogenation reaction solution and ensuring effective monitoring of the quality of lactitol during the production process.

[0023] 2. The design of the electric telescopic rod and the overflow block in the present invention enables the flow of the solution to be accurately controlled during the sampling process, thereby improving the convenience and efficiency of the operation and reducing the need for manual intervention.

[0024] 3. The design of the electric wheel I and the electric wheel II in the present invention enables the sampling tube to be accurately inserted into the liquid aspiration pipe at each corresponding position for sampling, and combined with the setting of the backflush tube and the cleaning chamber, the sampling tube can be backflush cleaned after sampling, thereby avoiding the influence of residual detection solution on the next detection and ensuring the accuracy of the detection result.

[0025] 4. By setting a scraper and a support rod, the present invention can scrape the inner wall of the liquid pipe and the sampling tube during the sampling process, effectively avoiding the lactose solution from adhering to the inner wall of the pipe, improving the accuracy of the next sampling and recovering the lactose solution adhering to the inner wall of the pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments in conjunction with the accompanying drawings.

[0027] Figure 1 It is a front view of the present invention;

[0028] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 3It is a schematic diagram of the structural installation of the reaction chamber and the sampling device in the present invention;

[0030] Figure 4 for Figure 3 A partial enlarged view of the middle A;

[0031] Figure 5 A bottom view of the support plate of the present invention;

[0032] Figure 6 It is a schematic diagram of the structural installation of the support rod and the overflow block located inside the reaction chamber in the present invention;

[0033] Figure 7 A bottom view of the liquid suction pipe in the present invention;

[0034] Figure 8 It is a schematic diagram of the state in which the scraper in the present invention extracts the liquid suction pipe.

[0035] In the figure: 1. work frame; 2. turntable; 3. servo motor; 4. coupling; 5. reaction chamber; 6. liquid suction pipeline; 601. fixing ring; 602. closing cover; 603. vacuum pump; 7. sampling device; 701. cylinder; 702. electric turntable I; 703. support rod; 704. electric turntable II; 705. flip rod; 706. positioning ring; 707. sampling tube; 8. supporting plate; 9. connecting rod; 10. electric telescopic rod; 11. overflow block; 12. bushing; 13. positioning shaft; 14. clamping block; 15. cleaning chamber; 16. backblowing pipe; 17. support rod; 18. scraper. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] See also Figure 1-8 The high-pressure sampling device in the lactitol production process of the present invention comprises a turntable 2 rotatably mounted on a work frame 1, a servo motor 3 is mounted on the work frame 1 below the turntable 2, and the servo motor 3 is connected to the center of the turntable 2 through a coupling 4 to drive the turntable 2 to rotate;

[0038] The turntable 2 is provided with a plurality of reaction chambers 5 distributed around the circumference of the upper surface of the turntable 2, and the top of each reaction chamber 5 is provided with a plurality of pipettes 6 inserted into the reaction chamber 5 for overflowing the solution in the reaction chamber 5. The plurality of pipettes 6 are distributed in different areas of the reaction chamber 5 to extract mixed samples from different areas in the reaction chamber 5, so as to improve the accuracy of extracting the lactose hydrogenation reaction solution in the reaction chamber 5;

[0039] A sampling device 7 is provided above the reaction chamber 5 . The sampling device 7 is installed on a support plate 8 located above the reaction chamber 5 . The support plate 8 is connected to the work frame 1 through a connecting rod 9 .

[0040] In one specific embodiment, an electric telescopic rod 10 is provided at the center of the reaction chamber 5, and the output end of the electric telescopic rod 10 passes through the upper top wall of the reaction chamber 5 and is connected to an overflow block 11 installed inside the reaction chamber 5. The electric telescopic rod 10 can control the overflow block 11 to rise and fall in the reaction chamber 5.

[0041] It should be noted that when the overflow block 11 descends to the solution in the reaction chamber 5 , due to the large volume of the overflow block 11 , the solution in the reaction chamber 5 rises to the liquid aspiration pipes 6 on each area.

[0042] In one specific embodiment, the sampling device 7 includes a cylinder 701 installed at the center of the support plate 8, the output end of the cylinder 701 extends to the bottom of the support plate 8 and is connected to an electric wheel Ⅰ702 installed under the support plate 8, two support rods 703 with an angle of 90° are installed on the side of the electric wheel Ⅰ702, and each of the support rods 703 is provided with an electric wheel Ⅱ704 at one end away from the electric wheel Ⅰ702, and the side of the electric wheel Ⅱ704 away from the support rod 703 is connected to an L-shaped flip rod 705, and the vertical section of the flip rod 705 is provided with a positioning ring 706, and the positioning ring 706 is provided with a plurality of sampling tubes 707 whose positions correspond to the positions of the liquid pipe 6 on the reaction chamber 5.

[0043] In one specific embodiment, the electric wheel I 702 and the electric wheel II 704 are driven by motors installed on the output end of the cylinder 701 and the support rod 703 respectively, so that the electric wheel I 702 rotates around the vertical center axis of the output end of the cylinder 701, and the electric wheel II 704 rotates around the horizontal center axis of the support rod 703.

[0044] In one specific embodiment, a sleeve 12 is provided at the top of the fixed end of the electric telescopic rod 10 located at the center of the reaction chamber 5, and a positioning shaft 13 matching the position of the sleeve 12 is provided at the bottom of the positioning ring 706 above the sleeve 12. The positioning shaft 13 can be inserted into the sleeve 12 so that the sampling tube 707 can be accurately inserted into the liquid pipe 6 at each corresponding position for sampling. A plurality of movable clamping blocks 14 are distributed on the circumference of the top of the sleeve 12 for fixing the position of the positioning shaft 13 inserted into the sleeve 12 to improve the accuracy of positioning.

[0045] In one specific embodiment, two cleaning chambers 15 are provided on the upper surface of the support plate 8, and the two cleaning chambers 15 are respectively located directly above the two positioning circles 706. The two cleaning chambers 15 respectively extend backblowing pipes 16 corresponding to the position and number of sampling tubes 707 on each positioning circle 706 toward the surface of the support plate 8 facing the positioning circle 706, and the mixed solution of gas and cleaning liquid in the cleaning chamber 15 is sprayed out by the backblowing pipes 16 under the action of the pump body in the cleaning chamber 15.

[0046] It should be noted that, under the action of the electric wheel II 704, the flip rod 705 drives the sampling tube 707 to flip to a position facing the back-blowing tube 16, and then the cylinder 701 acts to insert the back-blowing tube 16 into the sampling tube 707 for back-blowing cleaning, so as to ensure that the sampling tube 707 is not affected by the residual detection solution when it is tested again.

[0047] In one specific embodiment, the output end of the electric telescopic rod 10 located in the reaction chamber 5 is provided with a plurality of L-shaped support rods 17 that are consistent with the position and number of the pipette pipe 6, and the vertical section of the support rod 17 is inserted into the pipette pipe 6 at the corresponding position, and the top of the vertical section of each support rod 17 is provided with two scrapers 18 of different sizes, and the scraper 18 located directly above one of the scrapers 18 has a smaller diameter than the scraper 18 located below it, and the two scrapers 18 are connected by a vertical rod, and multiple through holes are opened on the surface of the two scrapers 18.

[0048] It should be noted that when the overflow block 11 descends, the lactose solution passes through the through holes on the two scrapers 18 and enters the liquid suction pipe 6. At this time, the sampling tube 707 descends into the liquid suction pipe 6 for sampling, and then the solution extracted by the sampling tube 707 is transferred to the detection area. After the detection solution is transferred, the sampling tube 707 is again transferred by the electric wheel Ⅰ702 to the position where the solution was extracted before. Under the action of the electric telescopic rod 10, the two scrapers 18 scrape the inner wall of the sampling tube 707 and the inner wall of the liquid suction pipe 6 respectively to prevent the lactose solution from adhering to the inner wall of the pipe and affecting the next detection.

[0049] In one specific embodiment, each of the pipette pipes 6 is provided with a fixing ring 601 on the upper surface outside the reaction chamber 5, and a rotatable closing cover 602 is provided on the fixing ring 601 for closing the upper surface of the pipette pipe 6 in a non-sampling state to ensure the normal reaction of the lactose solution in the reaction chamber 5.

[0050] In one specific embodiment, a vacuum fan 603 is provided on one side of each of the liquid suction pipes 6 for sucking the air in the liquid suction pipes 6 .

[0051] It should be noted that, since the bottom of the pipette 6 extends into the solution and the top of the pipette 6 is engaged with the sampling tube 707 , the gas in the pipette 6 can be reduced to improve the ability of the pipette 6 to adsorb the solution in the reaction chamber 5 .

[0052] A method for using a high-pressure sampling device in a lactitol production process comprises the following steps:

[0053] S101, start the electric telescopic rod 10 to make the overflow block 11 descend into the solution in the reaction chamber 5. The solution is immersed in the overflow block 11, so that the liquid level of the solution rises to the liquid suction pipe 6. The vertical section of the support rod 17 is inserted into the corresponding liquid suction pipe 6. The scraper 18 descends with the support rod 17. The solution enters the liquid suction pipe 6 through the through hole on the scraper 18. The sealing cover 602 on the liquid suction pipe 6 is opened to prepare for sampling. The vacuum pump 603 starts to work to reduce the gas volume in the liquid suction pipe 6 and increase the adsorption capacity of the solution;

[0054] After the closing cover 602 is opened, during the sampling process, since the top of the pipette 6 is engaged with the sampling tube 707, the vacuum pump 603 can create a slight negative pressure environment, which is beneficial for the sampling tube 707 to extract the liquid in the pipette 6. At the same time, this slight negative pressure helps to attract the solution into the pipette 6, thereby improving the adsorption capacity of the solution.

[0055] S102, the electric wheel I 702 is driven by a motor to rotate around the vertical center axis of the output end of the cylinder 701, and the position of the sampling device 7 is adjusted. The electric wheel II 704 rotates around the horizontal center axis of the support rod 703, and the sampling tube 707 is accurately positioned above the liquid pipette 6. The cylinder 701 is pushed downward to make the sampling tube 707 pass through the positioning ring 706 and accurately inserted into the liquid pipette 6. The sampling tube 707 extracts the reaction solution from the liquid pipette 6 and transfers it to the detection area for analysis;

[0056] It should be noted that the overflow block 11 is designed to displace a certain volume of solution when it descends and immerses in the solution, so that the solution level rises and enters the suction pipe 6. In order to achieve this goal, the volume of the overflow block 11 needs to meet the following conditions:

[0057] 1. The volume of the overflow block 11 must be large enough to ensure that when it is completely immersed in the solution, the amount of solution it displaces can raise the solution level to the inlet height of the suction pipe 6.

[0058] 2. The volume of the overflow block 11 should also take into account the required solution filling volume of all the pipette pipes 6. In other words, the amount of solution discharged by the overflow block 11 should be at least equal to the total capacity of all the pipette pipes 6.

[0059] The total amount of solution needs to meet the following conditions:

[0060] 1. The total amount of solution should be large enough to ensure that even after the overflow block 11 is completely immersed in the solution, there is still enough solution to rise to the inlet of the suction pipe 6.

[0061] 2. The total volume of the solution should also take into account any volume changes that may occur during the entire reaction process, such as volume expansion or contraction due to chemical reactions.

[0062] Specifically, the relationship between the overflow block 11 and the solution volume can be summarized as follows:

[0063] 1. Selection of the volume of the overflow block 11: The volume V_overflow block of the overflow block 11 should be greater than or equal to the total volume V_pipeline of all the pipette pipes 6 plus a certain safety margin. This ensures that when the overflow block 11 is completely immersed in the solution, the solution level can rise to the entrance of the pipette pipe 6, so that the solution can enter the pipette pipe 6.

[0064]

[0065] 2. Total amount of solution: The total amount of solution V_solution should be sufficient to ensure that the solution level can still rise to the inlet of the suction pipe 6 after the overflow block 11 is fully immersed. In addition, the total amount of solution also needs to take into account the volume change that may occur during the reaction.

[0066]

[0067] S103, after transferring the detection solution, the sampling tube 707 is again transferred by the electric rotating wheel Ⅰ702 to the position where the solution was extracted before. The two scrapers 18 scrape the inner wall of the sampling tube 707 and the inner wall of the liquid pipe 6 respectively under the action of the electric telescopic rod 10 to prevent the lactose solution from adhering to the inner wall of the pipe and affecting the next detection. At the same time, the residual lactose solution can be collected again into the reaction chamber 5. The design of the scraper 18 is that the outer edge part is higher than the part close to the central axis. Therefore, when the scraper 18 moves upward, the solution scraped by the outer edge part of the scraper 18 flows into the part close to the central axis of the scraper 18, and then flows into the reaction chamber 5 through the through hole on the scraper 18. When the scraper 18 moves downward, the solution scraped by the outer edge part of the scraper 18 directly falls into the reaction chamber 5, avoiding the waste of the solution in the reaction chamber 5;

[0068] S104. Finally, the cylinder 701 is lifted, the sampling tube 707 leaves the liquid suction pipe 6, and the electric wheel II 704 rotates, driving the flip rod 705 to flip the sampling tube 707 to the cleaning position. The mixed solution in the cleaning chamber 15 is sprayed through the backflush tube 16 to clean the inner wall of the sampling tube 707. At this time, the other sampling tube 707 can be rotated to the area to be sampled. The two sampling tubes 707 cooperate with each other to improve the efficiency of sampling and cleaning.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to be a further limitation of the present invention. All equivalent changes made using the contents of the present specification and drawings are within the protection scope of the present invention.

Claims

1. A high-pressure sampling device in the lactitol production process, characterized in that: It comprises a turntable (2) mounted on a work frame (1) and capable of rotating, a servo motor (3) being mounted on the work frame (1) below the turntable (2), and the servo motor (3) being connected to the center of the turntable (2) via a coupling (4) to drive the turntable (2) to rotate; The turntable (2) is provided with a plurality of reaction chambers (5) distributed around the circumference of the upper surface of the turntable (2); the top of each reaction chamber (5) is provided with a plurality of liquid pipettes (6) inserted into the reaction chamber (5) for overflowing the solution in the reaction chamber (5); the plurality of liquid pipettes (6) are distributed in different areas of the reaction chamber (5) to extract mixed samples from different areas in the reaction chamber (5); A sampling device (7) is provided above the reaction chamber (5), and the sampling device (7) is installed on a support plate (8) located above the reaction chamber (5), and the support plate (8) is connected to the work frame (1) via a connecting rod (9); Two cleaning chambers (15) are provided on the upper surface of the support plate (8), and the two cleaning chambers (15) are respectively located directly above the two positioning rings (706). The two cleaning chambers (15) respectively extend backflush pipes (16) corresponding to the positions and numbers of the sampling tubes (707) on each positioning ring (706) toward the surface of the support plate (8) facing the positioning rings (706). A mixed solution of gas and cleaning liquid in the cleaning chamber (15) is sprayed out through the backflush pipes (16) under the action of a pump body in the cleaning chamber (15); The sampling device (7) comprises a cylinder (701) installed at the center of the support plate (8), the output end of the cylinder (701) extending to the bottom of the support plate (8) and connected to an electric rotary wheel I (702) installed below the support plate (8), two support rods (703) with an angle of 90° are installed on the side of the electric rotary wheel I (702), and each support rod (703) is provided with an electric rotary wheel II (704) at one end away from the electric rotary wheel I (702), and the side of the electric rotary wheel II (704) away from the support rod (703) is connected to an L-shaped flip rod (705), and the vertical section of the flip rod (705) is provided with a positioning ring (706), and the positioning ring (706) is provided with a plurality of sampling tubes (707) whose positions correspond to the positions of the liquid aspiration pipe (6) on the reaction chamber (5); An electric telescopic rod (10) is provided at the center of the reaction chamber (5), and an output end of the electric telescopic rod (10) passes through the upper top wall of the reaction chamber (5) and is connected to an overflow block (11) installed inside the reaction chamber (5); The output end of the electric telescopic rod (10) located in the reaction chamber (5) is provided with a plurality of L-shaped support rods (17) whose positions and numbers are consistent with those of the liquid suction pipe (6); the vertical sections of the support rods (17) are inserted into the liquid suction pipe (6) at corresponding positions; the top of the vertical section of each support rod (17) is provided with two scrapers (18) of different sizes; the diameter of the scraper (18) located directly above is smaller than the diameter of the scraper (18) located below; the two scrapers (18) are connected by a vertical rod; and the surfaces of the two scrapers (18) are provided with a plurality of through holes.

2. A high pressure sampling device in a lactitol production process according to claim 1, characterized in that: The electric wheel I (702) and the electric wheel II (704) are driven by motors installed on the output end of the cylinder (701) and the support rod (703) respectively.

3. The high-pressure sampling device in the lactitol production process according to claim 1, characterized in that: A shaft sleeve (12) is provided at the top of the fixed end of the electric telescopic rod (10) located at the center of the reaction chamber (5); a positioning shaft (13) matching the position of the shaft sleeve (12) is provided at the bottom of the positioning ring (706) above the shaft sleeve (12); and a plurality of movable clamping blocks (14) are distributed on the circumference of the top of the shaft sleeve (12) for fixing the position of the positioning shaft (13) inserted into the shaft sleeve (12).

4. The high-pressure sampling device in the lactitol production process according to claim 1, characterized in that: A fixing ring (601) is provided on the upper surface of each of the liquid aspiration pipes (6) located outside the reaction chamber (5), and a rotatable closing cover (602) is provided on the fixing ring (601).

5. The high-pressure sampling device in the lactitol production process according to claim 1, characterized in that: A vacuum pump (603) is provided on one side of each of the liquid suction pipes (6).

6. The method for using a high-pressure sampling device in a lactitol production process according to claim 1, characterized in that: The following steps are included: S101, start the electric telescopic rod (10) to make the overflow block (11) descend into the solution in the reaction chamber (5), the solution is immersed in the overflow block (11), so that the solution level rises to the liquid suction pipe (6), the vertical section of the support rod (17) is inserted into the corresponding liquid suction pipe (6), the scraper (18) descends with the support rod (17), the solution enters the liquid suction pipe (6) through the through hole on the scraper (18), the sealing cover (602) on the liquid suction pipe (6) is opened to prepare for sampling, and the vacuum pump (603) starts to work to reduce the gas volume in the liquid suction pipe (6) and increase the adsorption capacity of the solution; S102, driving the electric wheel I (702) by a motor to rotate around the vertical center axis of the output end of the cylinder (701), adjusting the position of the sampling device (7), rotating the electric wheel II (704) around the horizontal center axis of the support rod (703), accurately positioning the sampling tube (707) above the liquid aspiration pipe (6), pushing the cylinder (701) downward, allowing the sampling tube (707) to pass through the positioning ring (706) and accurately insert into the liquid aspiration pipe (6), and the sampling tube (707) extracts the reaction solution from the liquid aspiration pipe (6) and transfers it to the detection area for analysis; S103, after the detection solution is transferred, the sampling tube (707) is again transferred by the electric rotating wheel I (702) to the position where the solution was previously extracted, and the two scrapers (18) scrape the inner wall of the sampling tube (707) and the inner wall of the liquid suction pipe (6) respectively under the action of the electric telescopic rod (10), so as to prevent the lactose solution from adhering to the inner wall of the pipe and affecting the next detection, and at the same time, the residual lactose solution can be collected again into the reaction chamber (5), thereby avoiding waste; S104. Finally, the cylinder (701) is lifted, the sampling tube (707) leaves the liquid suction pipe (6), and the electric wheel II (704) rotates, driving the flip rod (705) to flip the sampling tube (707) to the cleaning position. The mixed solution in the cleaning chamber (15) is sprayed through the backflush pipe (16) to clean the inner wall of the sampling tube (707). At this time, the other sampling tube (707) is rotated to the area to be sampled. The two sampling tubes (707) cooperate with each other to improve the efficiency of sampling and cleaning.

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