Online sampling device for esterification kettle
The sampling device for the esterification vessel, which features a rotary drive mechanism and a self-cleaning function, solves the problem of real-time monitoring of samples at different depths within the esterification vessel, ensuring the accuracy and purity of the sampling results and reducing operational risks.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2026-03-20
AI Technical Summary
Existing esterification reactor sampling devices can only obtain samples at a fixed depth, which cannot reflect the material reaction status at different depths inside the esterification reactor in real time, and the sampling results are easily contaminated.
A rotary drive mechanism is used to drive the sampling main tube to rotate, and samples are extracted at different depths through multi-point sampling branches. It is also equipped with a U-shaped discharge pipe and discharge cylinder for self-cleaning, ensuring the accuracy and purity of the sampling results.
It enables real-time monitoring of materials at different depths inside the esterification reactor, with accurate and pollution-free sampling results. The operation is simple and safe, reducing the risk of manual operation.
Smart Images
Figure CN224019385U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of sampling equipment in chemical production, and in particular to an online sampling device for an esterification reactor. Background Technology
[0002] The online sampling device for esterification reactors is an important industrial equipment used to collect samples in real time during chemical reactions to ensure product quality and monitor the reaction process.
[0003] Currently, there are generally two types of sampling devices for conventional esterification reactors: one is to insert a sampling steel pipe from the top of the reactor, with a sampling valve on the pipe, and obtain a sample by pressing the material out under high pressure inside the reactor; the other is to install a sampling valve at the outlet pipe at the bottom of the reactor, and obtain the sample by the weight of the material itself. Both of these sampling devices can only obtain samples at a fixed depth and cannot reflect the reaction status of materials at different depths inside the esterification reactor in real time. Utility Model Content
[0004] The purpose of this invention is to provide an online sampling device for an esterification reactor. This device can achieve multi-point sampling at different depths, thereby monitoring the reaction status of materials at different depths in the esterification reactor in real time. At the same time, it can also realize the self-cleaning function of the sampling system, ensuring the accuracy and purity of the sampling results.
[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution:
[0006] An online sampling device for an esterification reactor includes a sampling main pipe rotatably connected to the top wall of the esterification reactor. The upper end of the sampling main pipe is connected to a vacuum pump via a sampling valve. The lower end of the sampling main pipe extends into the esterification reactor and is connected to a multi-point sampling mechanism inside the esterification reactor. The multi-point sampling mechanism includes multiple sampling branch pipes of different lengths. Each sampling branch pipe is connected to a sampling distribution box via a connecting pipe. The lower end of the sampling main pipe is rotatably connected to the sampling distribution box. The lower side wall of the sampling main pipe is provided with sampling ports for sequentially connecting to the sampling branch pipes. The sampling main pipe is connected to a rotary drive mechanism fixed to the top of the esterification reactor.
[0007] By adopting the above technical solution, a rotary drive mechanism is used to drive the sampling main pipe to rotate relative to the sampling distribution box, so that the sampling port at the lower end of the sampling main pipe rotates until its sampling port is connected to the sampling branch pipe of the corresponding length. Then, the sampling valve is opened and the vacuum pump is started, so that the sampling branch pipe connected to the sampling port of the sampling main pipe extracts the sample at the corresponding height in the esterification vessel. By connecting the sampling port at the lower end of the sampling main pipe to sampling branch pipes of different lengths in sequence, multi-point sampling at different depths can be achieved, thereby enabling real-time monitoring of the reaction status of materials at different depths in the esterification vessel. The structure is simple and the operation is convenient.
[0008] A further feature of this invention is that the rotary drive mechanism includes a drive motor fixed to the top of the esterification reactor, a drive gear fixed on the telescopic shaft of the drive motor, and the drive gear meshes with a driven gear fixed on the sampling tube.
[0009] By adopting the above technical solution, when the drive motor starts, it drives the drive gear to rotate. When the drive gear rotates, it drives the driven gear meshing with it to rotate, which in turn drives the sampling main tube fixedly connected to it to rotate together. This achieves precise docking between the sampling port on the sampling main tube and different sampling branches. No manual operation is required, the degree of automation is high, and the sampling efficiency and accuracy are greatly improved.
[0010] A further feature of this invention is that a U-shaped discharge pipe is provided at the top of the sampling main tube, one end of the U-shaped discharge pipe is connected to the sampling main tube, and the other end of the U-shaped discharge pipe faces downward.
[0011] By adopting the above technical solution, the U-shaped discharge pipe can guide the material discharged from the sampling main pipe. The opening of the U-shaped discharge pipe faces downward, so that the sample is slowly discharged downward, which not only facilitates sample collection, but also avoids sample splashing and ensures the cleanliness and safety of the experimental environment.
[0012] A further feature of this invention is that the end of the connecting tube furthest from the sampling and dispensing box is fixedly connected to the support base, and the support base is fixed to the top wall inside the esterification reactor.
[0013] By adopting the above technical solution, the support base can ensure the relative position stability of each sampling branch pipe, sampling main pipe and distribution box, thereby ensuring the accuracy and reliability of the sampling process. The support base is generally made of high-strength and corrosion-resistant materials to withstand the working environment inside the esterification reactor as well as pressure and temperature changes, further ensuring the reliability and stability of the entire sampling system.
[0014] A further feature of this invention is that a discharge cylinder is provided at the end of the connecting tube away from the sampling and dispensing box. The discharge cylinder is fixed on the support base, and the telescopic shaft of the discharge cylinder is fixedly connected to the discharge piston inside the connecting tube.
[0015] By adopting the above technical solution, the discharge cylinder is used to remove residual samples from the sampling branch pipe and connecting pipe after sampling, thereby avoiding interference from residual samples to subsequent sampling and ensuring that each sampling is pure and uncontaminated. After sampling, the telescopic shaft of the discharge cylinder extends, pushing the discharge piston to the side closer to the sampling distribution box, thereby pushing the material remaining in the connecting pipe to the sampling port connected to its other end and fully entering the sampling main pipe. As the discharge piston moves from one side of the connection port between the connecting pipe and the sampling branch pipe to the other side, the material in the sampling main pipe is completely extracted by the vacuum pump. Then, the telescopic shaft of the discharge cylinder is controlled to retract, so that the discharge piston moves back from the other side of the connection port between the connecting pipe and the sampling branch pipe. During this process, the remaining sample in the sampling branch pipe will be completely discharged under its own gravity and the airflow pressure generated by the movement of the discharge piston. Therefore, the self-cleaning function of the sampling system is realized, ensuring the accuracy and purity of the sampling results.
[0016] A further feature of this invention is that a sampling support plate is provided below the opening at the other end of the U-shaped discharge pipe, the sampling support plate is fixed to the top of the esterification reactor, and the sampling support plate is provided with sampling containers that match the number and position of the sampling branches.
[0017] By adopting the above technical solution, the sampling support plate is used to support the sampling container, so that the operator does not need to hold the sampling container, which greatly reduces the safety risks during the material receiving process, while also ensuring the convenience and efficiency of the sampling operation.
[0018] A further feature of this invention is that the sampling support plate is provided with multiple positioning grooves for accommodating sampling containers.
[0019] By adopting the above technical solution, the sampling container cooperates with the positioning groove on the sampling support plate, making the replacement of the sampling container simple and quick, and preventing it from sliding randomly during the sampling process, thus greatly improving the safety and accuracy of sampling.
[0020] A further feature of this invention is that the U-shaped discharge pipe is connected to the sampling main pipe.
[0021] A further feature of this invention is that the lower end of the sampling main tube is inserted into the sampling distribution box.
[0022] By adopting the above technical solution, the U-shaped discharge pipe, the sampling main pipe, and the sampling distribution box can be easily disassembled and assembled through plug-in connection, which greatly improves the maintainability and flexibility of the system.
[0023] The beneficial effects of this utility model are:
[0024] 1. This utility model utilizes a rotary drive mechanism to drive the sampling main pipe to rotate relative to the sampling distribution box, so that the sampling port at the lower end of the sampling main pipe rotates until its sampling port is connected to the sampling branch pipe of the corresponding length. Then, the sampling valve is opened and the vacuum pump is started, so that the sampling branch pipe connected to the sampling port of the sampling main pipe extracts the sample at the corresponding height in the esterification vessel. By connecting the sampling port at the lower end of the sampling main pipe to sampling branch pipes of different lengths in sequence, multi-point sampling at different depths can be achieved, thereby enabling real-time monitoring of the reaction status of materials at different depths in the esterification vessel. The structure is simple and the operation is convenient.
[0025] 2. In this utility model, the U-shaped discharge tube can guide the material discharged from the sampling tube. The opening of the U-shaped discharge tube faces downward, so that the sample is slowly discharged downward, which not only facilitates sample collection, but also avoids sample splashing and ensures the cleanliness and safety of the experimental environment.
[0026] 3. In this utility model, the discharge cylinder is used to remove residual samples from the sampling branch pipe and connecting pipe after sampling, thereby avoiding interference from residual samples to subsequent sampling and ensuring that each sampling is pure and uncontaminated. After sampling, the telescopic shaft of the discharge cylinder extends, pushing the discharge piston to the side closer to the sampling distribution box, thereby pushing the material remaining in the connecting pipe to the sampling port connected to its other end and fully entering the sampling main pipe. As the discharge piston moves from one side of the connection port between the connecting pipe and the sampling branch pipe to the other side, the material in the sampling main pipe is completely extracted under the action of the vacuum pump. Then, the telescopic shaft of the discharge cylinder is controlled to retract, so that the discharge piston moves back from the other side of the connection port between the connecting pipe and the sampling branch pipe. During this process, the remaining sample in the sampling branch pipe will be completely discharged under its own gravity and the airflow pressure generated by the movement of the discharge piston. Therefore, the self-cleaning function of the sampling system is realized, ensuring the accuracy and purity of the sampling results.
[0027] 4. This utility model supports the sampling container with a support plate, so that the operator does not need to hold the sampling container, which greatly reduces the safety risks during the material receiving process. At the same time, it also ensures the convenience and efficiency of the sampling operation. The sampling container cooperates with the positioning groove on the sampling support plate, which makes the replacement of the sampling container simple and quick and prevents it from sliding at will during the sampling process, greatly improving the safety and accuracy of the sampling. Attached Figure Description
[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0029] Figure 1 This is a schematic diagram of the external structure of an online sampling device for an esterification reactor according to this utility model.
[0030] Figure 2 This is a schematic diagram of the connection structure between the sampling main tube and the multi-point sampling mechanism in an online sampling device for an esterification reactor according to this utility model.
[0031] Figure 3 This is a cross-sectional schematic diagram of the multi-point sampling mechanism in an online sampling device for an esterification reactor according to this utility model.
[0032] In the diagram, 1. Esterification vessel; 2. Sampling main pipe; 3. Multi-point sampling mechanism; 31. Sampling branch pipe; 32. Connecting pipe; 33. Sampling distribution box; 34. Sampling port; 4. Rotary drive mechanism; 41. Drive motor; 42. Drive gear; 43. Driven gear; 5. U-shaped discharge pipe; 6. Support base; 7. Discharge cylinder; 8. Discharge piston; 9. Sampling support plate; 10. Sampling container; 11. Positioning groove; 12. Sampling valve. Detailed Implementation
[0033] The technical solution of this utility model will now be clearly and completely described with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.
[0034] like Figures 1-3 As shown, an online sampling device for an esterification reactor includes a sampling main pipe 2 rotatably connected to the top wall of an esterification reactor 1. The upper end of the sampling main pipe 2 is connected to a vacuum pump via a sampling valve 12. The lower end of the sampling main pipe 2 extends into the esterification reactor 1 and is connected to a multi-point sampling mechanism 3 inside the esterification reactor 1. The multi-point sampling mechanism 3 includes multiple sampling branch pipes 31 of different lengths. Each sampling branch pipe 31 is connected to a sampling distribution box 33 via a connecting pipe 32. The lower end of the sampling main pipe 2 is rotatably connected to the sampling distribution box 33. The lower end side wall of the sampling main pipe 2 is provided with sampling ports 34 for sequentially communicating with the sampling branch pipes 31. The sampling main pipe 2 is connected to a rotary drive mechanism 4 fixed to the top of the esterification reactor 1.
[0035] Furthermore, the rotary drive mechanism 4 includes a drive motor 41 fixed on the top of the esterification vessel 1, and a drive gear 42 is fixed on the telescopic shaft of the drive motor 41. The drive gear 42 meshes with a driven gear 43 fixed on the sampling tube 2.
[0036] Furthermore, a U-shaped discharge pipe 5 is provided at the top of the sampling main pipe 2. One end of the U-shaped discharge pipe 5 is connected to the sampling main pipe 2, and the other end of the U-shaped discharge pipe 5 opens downwards.
[0037] Furthermore, the end of the connecting tube 32 away from the sampling and dispensing box 33 is fixedly connected to the support base 6, which is fixed on the inner top wall of the esterification reactor 1.
[0038] Furthermore, a discharge cylinder 7 is provided at the end of the connecting pipe 32 away from the sampling and dispensing box 33. The discharge cylinder 7 is fixed on the support base 6, and the telescopic shaft of the discharge cylinder 7 is fixedly connected to the discharge piston 8 inside the connecting pipe 32.
[0039] Furthermore, a sampling support plate 9 is provided below the opening at the other end of the U-shaped discharge pipe 5. The sampling support plate 9 is fixed to the top of the esterification kettle 1. The sampling support plate 9 is provided with sampling containers 10 that match the number and position of the sampling branch pipes 31.
[0040] Furthermore, the sampling support plate 9 is provided with a plurality of positioning slots 11 for accommodating the sampling container 10.
[0041] Furthermore, the U-shaped discharge pipe 5 is inserted into the sampling main pipe 2.
[0042] Furthermore, the lower end of the sampling main tube 2 is inserted into the sampling distribution box 33.
[0043] The working principle of this utility model is as follows: When sampling is required, the drive motor 41 is started, which drives the drive gear 42 to rotate. The drive gear 42 rotates, which in turn drives the driven gear 43 meshing with it to rotate. This causes the driven gear 43 to drive the sampling main pipe 2, which is fixedly connected to it, to rotate together. The sampling main pipe 2 rotates until its lower sampling port 34 aligns with the sampling branch pipe 31 at the desired sampling depth. Then, the sampling valve 12 is opened and the vacuum pump is started, allowing the sampling branch pipe 31, connected to the sampling port 34 of the sampling main pipe 2, to extract the sample at the corresponding height from the esterification reactor 1. By connecting the lower sampling port 34 of the sampling main pipe 2 sequentially with sampling branch pipes 31 of different lengths, multi-point sampling at different depths can be achieved. This allows for real-time monitoring of the reaction state of materials at different depths within the esterification reactor 1. The structure is simple and the operation is straightforward. Conveniently, after sampling is completed, the telescopic shaft of the discharge cylinder 7 extends, pushing the discharge piston 8 to move towards the side closer to the sampling distribution box, thereby pushing the material remaining in the connecting pipe 32 to the sampling port 34 connected to its other end, and fully entering the sampling main pipe 2. As the discharge piston 8 moves from one side of the connection between the connecting pipe 32 and the sampling branch pipe 31 to the other side, the material in the sampling main pipe 2 is completely extracted under the action of the vacuum pump. Then, the telescopic shaft of the discharge cylinder 7 is controlled to retract, so that the discharge piston 8 moves back from the other side of the connection between the connecting pipe 32 and the sampling branch pipe 31. During this process, the remaining sample in the sampling branch pipe 31 will be completely discharged under its own gravity and the airflow pressure generated by the movement of the discharge piston 8. Therefore, the self-cleaning function of the sampling system is realized, ensuring the accuracy and purity of the sampling results.
Claims
1. An online sampling device for an esterification reactor, characterized in that: The sampler includes a sampling main pipe (2) rotatably connected to the top wall of the esterification vessel (1). The upper end of the sampling main pipe (2) is connected to a vacuum pump via a sampling valve (12). The lower end of the sampling main pipe (2) extends into the esterification vessel (1) and is connected to a multi-point sampling mechanism (3) inside the esterification vessel (1). The multi-point sampling mechanism (3) includes multiple sampling branches (31) of different lengths. Each sampling branch (31) is connected to a sampling distribution box (33) via a connecting pipe (32). The lower end of the sampling main pipe (2) is rotatably connected to the sampling distribution box (33). The lower end side wall of the sampling main pipe (2) is provided with sampling ports (34) for sequentially connecting to the sampling branches (31). The sampling main pipe (2) is connected to a rotary drive mechanism (4) fixed on the top of the esterification vessel (1).
2. The online sampling device for an esterification reactor according to claim 1, characterized in that: The rotary drive mechanism (4) includes a drive motor (41) fixed on the top of the esterification vessel (1), and a drive gear (42) is fixed on the telescopic shaft of the drive motor (41). The drive gear (42) meshes with a driven gear (43) fixed on the sampling tube (2).
3. The online sampling device for an esterification reactor according to claim 1, characterized in that: The top of the sampling main tube (2) is provided with a U-shaped discharge tube (5), one end of which is connected to the sampling main tube (2), and the other end of which is open downwards.
4. The online sampling device for an esterification reactor according to claim 3, characterized in that: The end of the connecting tube (32) away from the sampling distribution box (33) is fixedly connected to the support base (6), which is fixed on the top wall inside the esterification kettle (1).
5. The online sampling device for an esterification reactor according to claim 4, characterized in that: The end of the connecting pipe (32) away from the sampling distribution box (33) is also provided with a discharge cylinder (7). The discharge cylinder (7) is fixed on the support base (6). The telescopic shaft of the discharge cylinder (7) is fixedly connected to the discharge piston (8) inside the connecting pipe (32).
6. The online sampling device for an esterification reactor according to claim 3, characterized in that: A sampling support plate (9) is provided below the opening at the other end of the U-shaped discharge pipe (5). The sampling support plate (9) is fixed on the top of the esterification kettle (1). A sampling container (10) matching the number and position of the sampling branch pipe (31) is provided on the sampling support plate (9).
7. The online sampling device for an esterification reactor according to claim 6, characterized in that: The sampling support plate (9) is provided with multiple positioning slots (11) for accommodating the sampling container (10).
8. The online sampling device for an esterification reactor according to claim 7, characterized in that: The U-shaped discharge pipe (5) is connected to the sampling main pipe (2).
9. The online sampling device for an esterification reactor according to claim 1, characterized in that: The lower end of the sampling tube (2) is inserted into the sampling distribution box (33).