Accurate sampling device for autoclave

Abstract

The invention relates to the technical field of autoclave sampling, in particular to an accurate sampling device for an autoclave. The reaction kettle body is provided with a sampling structure for sealing and sampling an internally processed object; the sampling structure comprises an assembly shell for integrally fixing the reaction kettle body, and a pressure equalizing unit and a sampling unit which are connected with the reaction kettle body are arranged in the assembly shell; in the sampling process of the reaction kettle body, the internal air pressure is discharged to the sampling unit, and the internal pressure of the reaction kettle body and the atmospheric pressure are kept in a balanced state through the sampling unit. According to the invention, the pressure equalizing unit is matched with the sampling unit, so that the internal air pressure of the reaction kettle is balanced with the atmospheric pressure before sampling, and sample splashing or leakage caused by pressure difference is prevented; after sampling, the inside of the reaction kettle can be recovered to a normal processing pressure state, the subsequent processing flow is not influenced, and the continuity and stability of the reaction process are ensured.

Description

Technical Field

[0001] This invention relates to the field of high-pressure reactor sampling technology, and more specifically to a high-pressure reactor precise sampling device. Background Technology

[0002] A high-pressure reactor is a sealed container that accelerates and controls chemical reactions by withstanding high pressure (usually hundreds to thousands of atmospheres) and high temperature.

[0003] When sampling samples from inside a reactor under high pressure, precise pressure control and ensuring sample integrity are key technical challenges. Traditional high-pressure reactor sampling devices struggle to effectively balance the pressure inside and outside the reactor during sampling, easily leading to the introduction of contaminated samples from the outside air. Furthermore, the pressure recovery process inside the reactor after sampling is complex, potentially affecting the stability of subsequent processing. In addition, traditional devices often fail to achieve dynamic pressure balance and precise control during sampling, resulting in low sampling accuracy and cumbersome operation, making it difficult to meet the high requirements of sample integrity and stable pressure recovery.

[0004] Therefore, those skilled in the art have provided a high-pressure autoclave precision sampling device to solve the problems mentioned in the background art. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention provides: A high-pressure reactor precision sampling device includes: a reactor body; The reactor body is equipped with a sampling structure for sealed sampling of the processed items inside. The sampling structure includes an assembly shell for fixing the entire reactor body, and the assembly shell has a built-in pressure equalization unit and a sampling unit connected to the reactor body. During the sampling process of the reactor body, the internal air pressure is discharged to the sampling unit, and the sampling unit maintains the pressure inside the reactor body in equilibrium with the atmospheric pressure. After the internal air pressure of the reactor body is balanced with the external atmospheric pressure, the stirred material sample inside the reactor body is sampled and processed by the sampling unit.

[0006] Preferably, the pressure equalization unit includes a pressure equalization box disposed inside the assembly shell, and a fixing plate is fixed to the outer wall of the pressure equalization box, and the pressure equalization box is fixedly assembled inside the pressure equalization box via the fixing plate; The pressure equalization box is equipped with a sealing plug inside, and a vertical rod that slides through the outside of the pressure equalization box is fixed at the bottom of the sealing plug. The vertical rod has an internal toothed groove in the middle. The internal tooth groove is meshed with a gear at one end outside the pressure equalization box, and a drive rod is fixedly connected to the center of the gear. A servo motor is fixedly installed inside the assembly shell at one end of the drive rod.

[0007] Preferably, a tension spring is assembled between the sealing plug and the equalizing box, and the tension spring is sleeved and installed on the outside of the vertical rod.

[0008] Preferably, a sliding tooth groove is provided at the lower end of the vertical rod corresponding to the position of the internal tooth groove, and a sliding tooth block is movably arranged inside the sliding tooth groove, and a return spring is assembled between the sliding tooth block and the sliding tooth groove.

[0009] Preferably: the other end of the driving rod is equipped with a one-way bearing, and one end of the one-way bearing is connected to a driven rod. A worm is fixedly installed on the outer wall of the driven rod, and the worm meshes with a worm wheel. An adjusting rod is fixedly installed at the center of the worm wheel, and an inner adjusting groove is opened inside the adjusting rod. The inner adjusting groove is equipped with an electric telescopic rod, and an inner square rod is fixedly installed at the end of the electric telescopic rod away from the inner adjusting groove. A square groove rod is slidably sleeved on the outside of the inner square rod.

[0010] Preferably, the sampling unit includes a sampling ball fixedly assembled with a square groove rod, a closed ball is provided on the outside of the sampling ball, the sampling ball is rotatably installed inside the closed ball, a sampling groove is opened horizontally through the inner side of the sampling ball, and the sampling groove is vertically connected to the closed ball with a pressure tube and a repressurization tube. Both the pressure-applying pipe and the pressure-reducing pipe have a closed ball seal connection at one end, and the other end of the pressure-applying pipe is connected through to the top of the pressure equalization box.

[0011] Preferably, the top of the equalizing tank is connected to an equalizing pipe, and the end of the equalizing pipe away from the equalizing tank is connected to the top of the reactor body, and an isolation valve is installed between the equalizing pipe and the reactor body.

[0012] Preferably, a pressure supply pipe and a sampling pipe are respectively connected to the front and rear ends of the closed ball, and a one-way valve is installed between the pressure supply pipe and the sampling ball; The end of the discharge tube furthest from the closed sphere has a threaded shape on the outside; Furthermore, a sample storage bottle is screwed onto the outer side of the sample discharge tube, and a pressure relief valve for releasing air pressure is installed on the side of the sample storage bottle.

[0013] Preferably, a one-way valve is installed between the pressure pipe and the closed ball.

[0014] Preferably, both the reactor body and the bottom of the assembly shell are fixed with support frames, and a controller is installed on the outer wall of the assembly shell.

[0015] The technical effects and advantages of this invention are as follows: In this invention, the sampling structure is completely isolated from the external air of the reaction vessel during sampling, avoiding contamination of the sample by external impurities and ensuring the accuracy of the sample composition, which is crucial for the reliability of the analysis results.

[0016] In this invention, the pressure equalization unit works in conjunction with the sampling unit to equalize the internal air pressure of the reactor with the atmospheric pressure before sampling, preventing sample splashing or leakage due to pressure difference; after sampling, the internal pressure of the reactor can be restored to the normal processing pressure state without affecting the subsequent processing flow, thus ensuring the continuity and stability of the reaction process. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a high-pressure autoclave precision sampling device provided in this application; Figure 2 This is a side view of the high-pressure autoclave precision sampling device provided in this application; Figure 3 This is a structural schematic diagram of the cross-section of the reactor body in a high-pressure reactor precision sampling device provided in this application; Figure 4 This is a schematic diagram of the disassembled structure of a high-pressure autoclave precision sampling device provided in this application; Figure 5 This is a schematic diagram of the sealing plug in a high-pressure autoclave precision sampling device provided in this application; Figure 6 This application provides a high-pressure autoclave precision sampling device. Figure 5 Enlarged structural diagram at point A in the diagram; Figure 7 This is a schematic diagram of the equalization chamber in a high-pressure autoclave precision sampling device provided in this application; Figure 8 This application provides a high-pressure autoclave precision sampling device. Figure 7 Schematic diagram of the structure at point B; Figure 9 This is a schematic diagram of the structure of the enclosed sphere in a high-pressure autoclave precision sampling device provided in this application; Figure 10 This is a schematic diagram of the worm gear structure in a high-pressure autoclave precision sampling device provided in this application; Figure 11 This application provides a high-pressure autoclave precision sampling device. Figure 10 A magnified structural diagram at point C in the diagram.

[0018] In the picture: 1. Reactor body; 2. Sampling structure; 201. Assembly shell; 202. Equalizing box; 203. Fixing plate; 204. Sealing plug; 205. Vertical rod; 206. Internal tooth groove; 207. Sliding tooth groove; 208. Sliding tooth block; 209. Return spring; 210. Gear; 211. Driving rod; 212. One-way bearing; 213. Driven rod; 214. Worm gear; 215. Worm wheel; 216. Adjusting rod; 217. Internal adjusting groove; 218. Electric telescopic pole; 219. Inner square pole; 220. Square groove pole; 221. Sampling ball; 222. Sealing ball; 223. Equalizing pipe; 224. Isolation valve; 225. Pressure applying pipe; 226. Pressure supply pipe; 227. One-way valve I; 228. Repressurization pipe; 229. One-way valve II; 230. Sample discharge pipe; 231. Sample storage bottle; 232. Pressure relief valve; 233. Tension spring; 234. Servo motor; 3. Controller; 4. Support frame; 5. Exhaust valve pipe; 6. Feed pipe; 7. Drive motor; 8. Mixing frame; 9. Mixing blade; 10. Inner scraper. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Examples of the invention are given for illustrative and descriptive purposes only and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of the invention and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

[0020] Example 1, please refer to Figures 1-3 In this embodiment, a high-pressure reactor precise sampling device is provided, which includes: a reactor body 1; The reactor body 1 is equipped with a sampling structure 2 for sealing and sampling of the processed items inside; the sampling structure 2 is used to take samples after the internal air pressure is equalized, and is completely isolated from the air outside the reactor body 1 during the sampling process to ensure the accuracy of the sample without contamination. The sampling structure 2 includes an assembly shell 201 for fixing the reactor body 1 as a whole, and the assembly shell 201 has a built-in pressure equalization unit and a sampling unit connected to the reactor body 1; the pressure equalization unit and the sampling unit together can restore the inside of the reactor body 1 to the normal processing pressure state after sampling. During the sampling process of the reactor body 1, the internal air pressure is discharged to the sampling unit, and the sampling unit maintains the pressure inside the reactor body 1 in equilibrium with the atmospheric pressure. After the internal air pressure of the reactor body 1 is balanced with the external atmospheric pressure, the sample of the stirred material inside the reactor body 1 is sampled and processed by the sampling unit. A drain valve pipe 5 is installed through the bottom of the reactor body 1, and a feed pipe 6 is connected through the top of the reactor body 1 at a 45° angle. A sealing cover is provided on the outside of the feed pipe 6. The top of the reactor body 1 is equipped with a drive motor 7. The output end of the drive motor 7 rotates through the inside of the reactor body 1 and is fixedly connected to a stirring frame 8. The outer wall of the stirring frame 8 is fixedly provided with stirring blades 9 located inside the reactor body 1, and the inside of the reactor body 1 is tightly fitted with an inner scraper 10 that is integrally fixed to the stirring frame 8.

[0021] Both the reactor body 1 and the assembly shell 201 are fixed with support frames 4 at their bottoms, and a controller 3 is installed on the outer wall of the assembly shell 201.

[0022] Example 2, please refer to Figures 4-8 In this embodiment, a pressure equalization unit for sampling structure 2 in a high-pressure autoclave precision sampling device is provided; The pressure equalization unit includes a pressure equalization box 202 disposed inside the assembly shell 201, and a fixing plate 203 is fixed to the outer wall of the pressure equalization box 202. The pressure equalization box 202 is fixedly assembled inside the pressure equalization box 202 via the fixing plate 203. A sealing plug 204 is movably sealed inside the pressure equalization box 202. A vertical rod 205 that slides through the outside of the pressure equalization box 202 is fixed to the bottom of the sealing plug 204. An internal toothed groove 206 is formed in the middle of the vertical rod 205. The internal tooth groove 206 is meshed with a gear 210 at one end located outside the pressure equalization box 202, and an active rod 211 is fixedly connected to the center of the gear 210. One end of the active rod 211 is connected to a servo motor 234 fixedly installed inside the assembly shell 201.

[0023] The servo motor 234 is used to actively rotate the active rod 211. When the active rod 211 rotates clockwise, it can mesh with the internal tooth groove 206 through the gear 210, so that the descending sealing plug 204 can rise along the inside of the pressure equalization box 202 through the drive of the vertical rod 205, and supply the air pressure inside the pressure equalization box 202 to the sampling unit.

[0024] A tension spring 233 is assembled between the sealing plug 204 and the pressure equalization box 202, and the tension spring 233 is sleeved and installed on the outside of the vertical rod 205.

[0025] When a sample is taken from inside the reactor body 1, the pressure inside the reactor body 1 applies pressure to the sealing plug 204, causing its tension spring 233 to be compressed inside the equalizing box 202. The space between the sealing plug 204 and the top of the equalizing box 202 is used for the gas pressure inside the reactor body 1 to be discharged.

[0026] The lower end of the vertical rod 205 is provided with a sliding tooth groove 207 corresponding to the position of the internal tooth groove 206, and a sliding tooth block 208 is movably arranged inside the sliding tooth groove 207. A return spring 209 is assembled between the sliding tooth block 208 and the sliding tooth groove 207.

[0027] When the gear 210 continuously meshes with the inner tooth groove 206, after the gear 210 meshes with the sliding tooth block 208, the sliding tooth block 208 is pressed down and reset inside the sliding tooth groove 207 by the return spring 209.

[0028] The other end of the driving rod 211 is equipped with a one-way bearing 212, and one end of the one-way bearing 212 is connected to a driven rod 213. A worm gear 214 is fixedly installed on the outer wall of the driven rod 213, and the worm gear 214 meshes with a worm wheel 215. An adjusting rod 216 is fixedly installed at the center of the worm wheel 215, and an inner adjusting groove 217 is opened inside the adjusting rod 216. An electric telescopic rod 218 is installed inside the inner adjustment groove 217, and an inner square rod 219 is fixedly installed at the end of the electric telescopic rod 218 away from the inner adjustment groove 217. A square groove rod 220 is slidably sleeved on the outside of the inner square rod 219.

[0029] When the electric telescopic rod 218 is not driven by the sampling unit, the electric telescopic rod 218 is in a retracted state, so that its inner square rod 219 is separated from the square groove rod 220, and the selection of the adjusting rod 216 will not affect the transmission of the sampling unit.

[0030] Example 3, please refer to Figures 9-11 In this embodiment, a sampling unit of sampling structure 2 in a high-pressure autoclave precision sampling device is provided; The sampling unit includes a sampling ball 221 fixedly assembled with a square groove rod 220. A closed ball 222 is provided on the outside of the sampling ball 221. The sampling ball 221 is rotatably installed inside the closed ball 222. A sampling groove is opened horizontally through the inner wall of the sampling ball 221. The sampling groove is vertically connected to the closed ball 222 and a pressure tube 225 and a pressure repressurization tube 228. The pressure-applying pipe 225 and the pressure-reducing pipe 228 are both sealed at one end by a ball 222, and the other end of the pressure-applying pipe 225 is connected through to the top of the pressure equalization box 202. After the sampling ball 221 rotates inside the sealed ball 222, the direction and position of the sampling slot can be adjusted. When the sampling slot faces the direction of the pressure-applying pipe 225 and the pressure-reducing pipe 228, the air pressure of the pressure equalization unit can be reset and transmitted to the inside of the reactor body 1 to reset the air pressure inside the reactor body 1.

[0031] The top of the equalizing tank 202 is connected to an equalizing pipe 223, and the end of the equalizing pipe 223 away from the equalizing tank 202 is connected to the top of the reactor body 1. An isolation valve 224 is installed between the equalizing pipe 223 and the reactor body 1. The equalizing pipe 223 is used to discharge the gas pressure inside the reactor body 1 into the reactor body 1 and to equalize the gas pressure when the reactor body 1 is sampled. The front and rear ends of the closed ball 222 are respectively connected to a pressure supply pipe 226 and a sample discharge pipe 230. A one-way valve 227 is installed between the pressure supply pipe 226 and the sampling ball 221. The end of the sample discharge pipe 230 away from the closed ball 222 is threaded. A sample storage bottle 231 is screwed onto the outside of the thread of the sample discharge pipe 230. A pressure relief valve 232 for gas pressure discharge is installed on the side of the sample storage bottle 231. A one-way valve 229 is installed between the pressure recovery pipe 228 and the closed ball 222. The one-way valve 229 is used to prevent the gas pressure inside the reactor body 1 from being discharged into the pressure application pipe 225 through the pressure recovery pipe 228.

[0032] According to the above embodiments, the working principle of this invention is as follows: Pressure equalization process: When sampling is required, the isolation valve 224 is opened, and the high-pressure gas inside the reactor body 1 enters the pressure equalization box 202 through the pressure equalization pipe 223, pushing the sealing plug 204 to move downward and compressing the tension spring 233; during the descent of the sealing plug 204, the top space inside the pressure equalization box 202 increases to accommodate the gas discharged from the reactor until the gas pressure inside the reactor is equal to the atmospheric pressure; at this time, the gear 210 and the internal tooth groove 206 are in the initial state, and the sliding tooth block 208 is located at the top of the sliding tooth groove 207 under the action of the return spring 209; In the initial state, the interior of the reactor body 1 is under high pressure processing. The stirring rack 8, driven by the drive motor 7, uniformly mixes the materials through the stirring blades 9 and the inner scraper 10 to ensure the uniformity of the materials before sampling. The sealing plug 204 of the pressure equalization unit is tightly attached to the top of the pressure equalization box 202 under the action of the tension spring 233. The isolation valve 224 on the pressure equalization pipe 223 is in the open state, and the high-pressure gas in the reactor is connected to the pressure equalization box 202 through the pressure equalization pipe 223. During the pressure equalization process, when sampling is required, the high-pressure gas in the reactor enters the pressure equalization box 202, generating downward pressure on the sealing plug 204, compressing the tension spring 233, and pushing the sealing plug 204 down along the inner wall of the pressure equalization box 202. As the sealing plug 204 moves downward, the top space of the equalizing box 202 expands to accommodate the high-pressure gas discharged from the reactor until the gas pressure inside the reactor is equal to the external atmospheric pressure (equalization is completed); the elastic force of the tension spring 233 forms a dynamic balance with the gas pressure inside the reactor, ensuring a smooth equalization process and avoiding a sudden drop in pressure; the design of the return spring 209 of the sliding tooth groove 207 and the sliding tooth block 208 prevents the gear 210 from jamming when meshing, providing mechanical buffer for the subsequent repressurization stage; During the sampling process, after equalization, the servo motor 234 is activated to rotate counterclockwise, driving the active rod 211 and gear 210 to rotate. The gear 210 meshes with the inner tooth groove 206, keeping the vertical rod 205 and the sealing plug 204 stationary (at this time, the sealing plug 204 is balanced by air pressure and spring force). The electric telescopic rod 218 extends, allowing the inner square rod 219 to insert into the square groove rod 220, driving the sampling ball 221 to rotate within the sealing ball 222, aligning the sampling groove with the pressure tube 225 and the discharge tube 230. Since the air pressure inside the reactor is equal to that outside at this time, the stirred sample inside the reactor enters the discharge tube 230 through the sampling groove under the action of gravity or a slight pressure difference, and then flows into the sample storage bottle 231. The one-way valve 227 prevents the gas in the sample storage bottle 231 from flowing back, ensuring that outside air does not enter the sampling system during the sampling process and ensuring that the sample is uncontaminated. Once the sampling pathway is activated and equalization is complete, the servo motor 234 drives the active rod 211 to rotate counterclockwise (through gear 210 meshing with the inner tooth groove 206 of the vertical rod 205). However, at this time, the electric telescopic rod 218 is in a retracted state, the inner square rod 219 is separated from the square groove rod 220, and the sampling unit does not operate temporarily (to avoid accidental triggering during equalization). The electric telescopic rod 218 is extended manually or through the controller 3, the inner square rod 219 is inserted into the square groove rod 220, and the sampling ball 221 rotates in the closed ball 222, so that the sampling groove of the sampling ball 221 is aligned with the pressure tube 225 (connected to the equalization box 202) and the sample discharge tube 230 (connected to the sample storage bottle 231). Since the reactor is pressurized to the same level as the atmosphere, the sample enters the sampling trough into the discharge pipe 230 under the influence of gravity or a slight pressure difference, and finally flows into the sealed sample storage bottle 231. The sealed isolation design, with a high-precision sealing rotational fit between the sampling ball 221 and the sealing ball 222, prevents outside air from entering during the sampling process. One-way valve 227 (pressure supply pipe 226) prevents gas backflow into sample bottle 231, and one-way valve 229 (pressure return pipe 228) prevents gas pressure in the reactor from leaking through pressure return pipe 228, ensuring one-way flow in the sampling passage. Safety protection: The pressure relief valve 232 on the outside of sample bottle 231 releases excess gas pressure in real time to avoid sample splashing or container damage due to excessive local pressure during sampling. After sampling is completed, the electric telescopic rod 218 remains in the extended state, the servo motor 234 switches to clockwise rotation, and drives the vertical rod 205 to move upward through the gear 210 (the internal tooth groove 206 meshes with the gear 210), which in turn drives the sealing plug 204 to compress the tension spring 233 upward. When the sealing plug 204 moves upward, the high-pressure gas stored at the top of the equalizing box 202 is pressed into the sampling groove of the sampling ball 221 through the pressure application pipe 225. At this time, the sampling ball 221 has rotated to connect the pressure application pipe 225 and the pressure return pipe 228 (the other end of the pressure return pipe 228 is connected to the reactor body 1). Pressure recovery process: After sampling, the electric telescopic rod 218 remains extended, and the servo motor 234 rotates clockwise, driving the drive rod 211 and gear 210 to rotate. The gear 210 drives the vertical rod 205 and the sealing plug 204 to move upward through the internal tooth groove 206. The sealing plug 204 rises, pressing the gas stored in the equalization box 202 into the sampling groove of the sampling ball 221 through the pressure application pipe 225, and then returning it to the inside of the reactor body 1 through the pressure recovery pipe 228, so that the reactor can return to the normal processing pressure state. The one-way valve 229 prevents the gas pressure in the reactor from being discharged into the pressure application pipe 225 through the pressure recovery pipe 228, ensuring that the pressure recovery process proceeds smoothly. Afterwards, the electric telescopic rod 218 retracts, the inner square rod 219 separates from the square groove rod 220, and the sampling ball 221 stops rotating, completing one sampling operation cycle. High-pressure gas flows back to the interior of reactor body 1 through pressure recovery pipe 228, gradually increasing the pressure inside the reactor to the normal state required for processing; one-way bearing 212 is used to connect the driving rod 211 to the driven rod 213 through one-way bearing 212, ensuring that the transmission of worm gear 214 and worm wheel 215 during the reset process moves only in the pressure recovery direction, avoiding reverse misoperation; the electric telescopic rod 218 retracts after the reset is completed, disconnecting the sampling unit from the transmission system to prevent component interference during subsequent pressure equalization; The pressure inside the reactor is monitored in real time by a sensor (the pressure sensor at the pressure equalization pipe 223 is a pressure sensor). If the pressure sensor detects abnormal fluctuations during the sampling process (such as pressure equalization timeout or insufficient pressure re-pressure), the controller 3 will immediately stop the action and alarm. At the same time, emergency pressure relief or gas replenishment will be carried out through the drain valve pipe 5 or the feed pipe 6 to ensure equipment safety. The dynamic pressure balance utilizes the mechanical coupling between the tension spring 233 and the sealing plug 204 to convert the high pressure energy of the reactor into spring potential energy for storage (pressure equalization stage), and then converts it into pressure recovery power through the servo motor 234 (reset stage). No additional gas source is required, making it energy-saving and efficient. The sealed sampling passage allows the sampling ball 221 to rotate and switch the sampling groove direction. In conjunction with the one-way valve group, it achieves a multi-functional passage switching: "connecting to the reactor body 1 and the equalization box 202 during pressure equalization, connecting to the equalization box 202 and the sample storage bottle 231 during sampling, and connecting to the equalization box 202 and the reactor body 1 during re-pressure equalization," completely isolating the outside air. Material uniformity is ensured: the stirring rack 8 and the inner scraper 10 continuously remove materials adhering to the reactor wall, ensuring that the material state is consistent during sampling and avoiding sample deviation caused by stratification.

[0033] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A precision sampling device for a high-pressure autoclave, characterized in that, include: Reactor body; The reactor body is equipped with a sampling structure for sealed sampling of the processed items inside. The sampling structure includes an assembly shell for fixing the entire reactor body, and the assembly shell has a built-in pressure equalization unit and a sampling unit connected to the reactor body. During the sampling process of the reactor body, the internal air pressure is discharged to the sampling unit, and the sampling unit maintains the pressure inside the reactor body in equilibrium with the atmospheric pressure. After the internal air pressure of the reactor body is balanced with the external atmospheric pressure, the stirred material sample inside the reactor body is sampled and processed by the sampling unit. The pressure equalization unit includes a pressure equalization box disposed inside the assembly shell, and a fixing plate is fixed to the outer wall of the pressure equalization box. The pressure equalization box is fixedly assembled inside the pressure equalization box via the fixing plate. The pressure equalization box is equipped with a sealing plug inside, and a vertical rod that slides through the outside of the pressure equalization box is fixed at the bottom of the sealing plug. The vertical rod has an internal toothed groove in the middle. The inner tooth groove is meshed with a gear at one end outside the pressure equalization box, and a drive rod is fixedly connected to the center of the gear, and a servo motor is fixedly installed inside the assembly shell at one end of the drive rod. The sampling unit includes a sampling ball fixedly assembled with a square groove rod. A closed ball is provided on the outside of the sampling ball. The sampling ball is rotatably installed inside the closed ball. A sampling groove is opened horizontally through the inside of the sampling ball. The sampling groove is vertically connected to the closed ball with a pressure tube and a repressurization tube. Both the pressure-applying pipe and the pressure-reducing pipe have a closed ball seal connection at one end, and the other end of the pressure-applying pipe is connected through to the top of the pressure equalization box.

2. The high-pressure autoclave precision sampling device according to claim 1, characterized in that, A tension spring is assembled between the sealing plug and the equalizing box, and the tension spring is sleeved and installed on the outside of the vertical rod.

3. The high-pressure autoclave precision sampling device according to claim 2, characterized in that, The lower end of the vertical rod is provided with a sliding tooth groove corresponding to the position of the internal tooth groove, and a sliding tooth block is movably arranged inside the sliding tooth groove. A return spring is assembled between the sliding tooth block and the sliding tooth groove.

4. The high-pressure autoclave precision sampling device according to claim 1, characterized in that, The other end of the driving rod is equipped with a one-way bearing, and one end of the one-way bearing is connected to a driven rod. A worm is fixedly installed on the outer wall of the driven rod, and the worm meshes with a worm wheel. An adjusting rod is fixedly installed at the center of the worm wheel, and an inner adjusting groove is opened inside the adjusting rod. The inner adjusting groove is equipped with an electric telescopic rod, and an inner square rod is fixedly installed at the end of the electric telescopic rod away from the inner adjusting groove. A square groove rod is slidably sleeved on the outside of the inner square rod.

5. The high-pressure autoclave precision sampling device according to claim 1, characterized in that, The top of the equalizing tank is connected to an equalizing pipe, and the end of the equalizing pipe away from the equalizing tank is connected to the top of the reactor body. An isolation valve is installed between the equalizing pipe and the reactor body.

6. The high-pressure autoclave precision sampling device according to claim 1, characterized in that, The front and rear ends of the closed ball are respectively connected to a pressure supply pipe and a sampling pipe, and a one-way valve is installed between the pressure supply pipe and the sampling ball. The end of the discharge tube furthest from the closed sphere has a threaded shape on the outside; Furthermore, a sample storage bottle is screwed onto the outer side of the sample discharge tube, and a pressure relief valve for releasing air pressure is installed on the side of the sample storage bottle.

7. The high-pressure autoclave precision sampling device according to claim 6, characterized in that, A one-way valve is installed between the pressure pipe and the closed ball.

8. The high-pressure autoclave precision sampling device according to claim 1, characterized in that, Both the reactor body and the bottom of the assembly shell are fixed with support frames, and a controller is installed on the outer wall of the assembly shell.

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