Fluidized bed sampling device

Abstract

A fluidized bed sampling device comprises a plugging pipe communicated with a fluidized bed pot body, a piston is arranged in the plugging pipe, the piston is fixedly connected with a push-pull rod, one end of the push-pull rod is arranged in the plugging pipe, the plugging pipe is communicated with a sampling pipe, a sampling ball is assembled in the sampling pipe, and a through hole for a sampling rod to penetrate through is formed in the sampling ball. The fluidized bed sampling device is used for solving the problems that the existing fluidized bed sampling device can only take materials near a sampling point, and the production efficiency is influenced by shutdown sampling of materials at the center of a fluidized bed pot body.

Description

Technical Field

[0001] This utility model relates to a fluidized bed sampling device. Background Technology

[0002] In the field of solid dosage form production, fluidized bed granulation is a widely used process. This process uses fluidized bed equipment to heat, mix, and granulate materials to achieve the desired particle size and quality standards. However, during fluidized bed granulation, the moisture content of the material is crucial to product quality. Excessive or insufficient moisture content can affect subsequent processes such as tableting and coating, and may even lead to product defects. Traditional fluidized bed sampling primarily uses fixed-point passive sampling. This method involves opening the sampling port and allowing the material to enter the sampling cup under gravity. However, this sampling method has significant limitations. First, fixed-point passive sampling can only collect material near the sampling port, while material at the edge of the fluidized bed typically has lower moisture content, is lighter, and is more easily blown to the edge by gas. Therefore, this sampling method cannot accurately reflect the moisture content of the material at the center of the fluidized bed. Second, for materials produced in large batches, the moisture content of the material at the center of the fluidized bed may be higher, which fixed-point passive sampling cannot effectively detect. This may lead to a deviation between the actual moisture content of the material and the standard requirements, thus affecting product quality. Furthermore, existing solutions require shutting down the fluidized bed equipment and then opening it to sample and test the material at the center. This method of sampling while the equipment is shut down is not only time-consuming but also severely impacts production efficiency. Therefore, developing a device that can perform sampling while the fluidized bed is in operation, in order to improve the representativeness of the samples and production efficiency, is an urgent problem to be solved in the current solid dosage form production field. Utility Model Content

[0003] The purpose of this invention is to provide a fluidized bed sampling device to solve the problem that existing fluidized bed sampling devices can only sample materials near the sampling point, and require stopping the machine to sample materials at the center of the fluidized bed, which affects production efficiency.

[0004] To solve the above problems, the technical solution of this utility model is as follows:

[0005] A fluidized bed sampling device includes a sealing tube connected to the fluidized bed body, a piston inside the sealing tube, the piston being fixedly connected to a push-pull rod with one end inside the sealing tube, a sampling tube connected to the sealing tube, a rotatable sampling ball being fitted inside the sampling tube, and a through hole for the sampling rod to pass through the sampling ball.

[0006] Furthermore, a flange is provided at the opening of the sealing pipe, and a push-pull rod is set inside the flange. A sealing ring is provided between the flange and the push rod. The push-pull rod pulls the piston against the end face of the flange.

[0007] Furthermore, a limiting skirt is provided at the end of the push-pull rod away from the piston. When the piston seals the sampling tube, the skirt abuts against the flange.

[0008] Furthermore, a sleeve is fixedly connected inside the sampling tube, and the sleeve has a spherical groove, in which the sampling ball is assembled.

[0009] Furthermore, the sleeve is made of brass.

[0010] Furthermore, a cleaning pipe is connected to one end of the sealing pipe, and a valve is installed on the cleaning pipe.

[0011] Furthermore, two to four sampling devices are installed on the fluidized bed boiler.

[0012] Furthermore, the sampling ball is made of 316L stainless steel.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. Improved Sampling Representativeness: By rotating the sampling ball to change the angle of the through-hole axis and adjusting the length of the sampling rod extending into the fluidized bed pot, materials at different locations within the pot can be sampled while the fluidized bed is in operation. This allows for a wider sampling range, covering materials at the center and edges of the fluidized bed pot, thus accurately reflecting the moisture distribution of the materials and improving the representativeness of the sampling.

[0015] 2. Sampling without stopping the machine: The entire sampling process can be completed without stopping the machine, and the material inside the pot remains isolated from the outside environment. After the sampling rod is inserted into the through hole, the piston is moved by the push-pull rod to open and close the sampling tube. This design ensures that there is no leakage of material during the sampling process, while avoiding the impact of stopping the machine for sampling on production efficiency.

[0016] 3. Improved operational safety: The device is equipped with a flange and sealing ring at the end of the sealing tube, and a limiting skirt on the push-pull rod. These structural designs effectively prevent the piston from being completely pushed out of the sealing tube, avoiding the risk of material leakage and operator misoperation, and improving the safety of the sampling process.

[0017] 4. Easy to clean and maintain: One end of the sealing pipe is connected to a cleaning pipe and equipped with a valve. When it is necessary to flush and clean the sealing pipe, cleaning fluid can be poured into the sealing pipe through the through hole and then discharged through the cleaning pipe, which facilitates the daily maintenance and cleaning of the equipment by the operator.

[0018] 5. Adaptable to diverse production needs: Two to four sampling devices can be installed on the fluidized bed boiler, and each sampling device is evenly distributed around the axis of the boiler. This design can meet the needs of different production scales and material characteristics, and realize omnidirectional sampling of materials inside the boiler.

[0019] In summary, the fluidized bed sampling device of this invention not only improves the representativeness of sampling and production efficiency, but also enhances operational safety and equipment maintenance convenience, providing an efficient and reliable sampling solution for the solid dosage form production field. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings:

[0021] Figure 1 This is a schematic diagram of the structure of this utility model.

[0022] Figure 2 This is a partially enlarged structural schematic diagram of the present invention.

[0023] Figure 3 This is a schematic diagram of the sample range that can be taken according to this utility model.

[0024] In the diagram: 1 is the fluidized bed boiler body, 2 is the cleaning pipe, 3 is the valve, 4 is the push-pull rod, 5 is the sampling ball, 6 is the sampling pipe, 7 is the sampling rod, 8 is the sealing ring, 9 is the flange, 10 is the sleeve, 11 is the piston, 12 is the sealing pipe, and 13 is the skirt. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] like Figure 1 and 2 As shown, a fluidized bed sampling device includes a sealing pipe 12 connected to the fluidized bed pot 1. The sealing pipe 12 is inclined downward. A piston 11 is provided inside the sealing pipe 12. The piston 11 is fixedly connected to a push-pull rod 4 with one end set inside the sealing pipe 12. A sampling pipe 6 is obliquely connected to the sealing pipe 12. A rotatable sampling ball 5 is assembled inside the sampling pipe 6. A through hole is opened on the sampling ball 5 for the sampling rod 7 to pass through.

[0027] In practice, the sampling rod 7 is first inserted into the through hole on the sampling ball 5 to seal the sampling tube 6. Then, the piston 11 is pulled back by the push-pull rod 4 to open the opening of the sealing tube 12 connecting the pot body 1, allowing the sampling rod 7 to extend into the pot body 1. The sampling rod 7 is then used to sample the material inside the pot body 1. Since the sampling ball 5 can rotate inside the sampling tube 6, the sampling rod 7 can sample from multiple locations on the pot body 1. After the sampling rod 7 completes sampling, it is pulled outward, ensuring that it is not completely pulled out of the through hole, keeping the through hole sealed. Then, the push-pull rod 4 is pushed forward, and the piston 11 seals the opening of the sealing tube 12 connecting the pot body 1. Finally, the sampling rod 7 is completely pulled out of the through hole, and the extracted material is collected in a dedicated sample container for subsequent testing, thus completing the entire sampling process.

[0028] Furthermore, a flange 9 is provided at the opening of the sealing tube 12, and a push-pull rod 4 is disposed inside the flange 9. A sealing ring 8 is provided between the flange 9 and the push-pull rod. The push-pull rod 4 pulls the piston 11 against the end face of the flange 9. Firstly, the cooperation between the flange 9 and the sealing ring 8 further enhances the sealing performance of the sealing tube 12, effectively preventing material leakage from the gap between the sealing tube 12 and the push-pull rod 4 during the sampling process, thus improving the reliability of the sampling process. Secondly, the flange 9 can limit the piston 11, preventing the piston 11 from being completely pulled out of the sealing tube 12, avoiding equipment damage caused by improper operation, and improving the service life and operational safety of the equipment.

[0029] Furthermore, an annular limiting skirt 13 is provided at the end of the push-pull rod 4 away from the piston 11. When the piston 11 seals the sampling tube 6, the skirt 13 abuts against the flange 9. The skirt 13 can limit the stroke of the push-pull rod 4, preventing the piston 11 from being completely pushed out of the sealing tube 12, avoiding equipment failure and material leakage due to misoperation, and further improving the safety and reliability of operation. In addition, through the cooperation of the limiting skirt 13 and the flange 9, the operator can more intuitively control the movement of the push-pull rod 4, simplifying the sampling operation process and reducing the difficulty of operation.

[0030] Furthermore, a sleeve 10 is fixedly connected inside the sampling tube 6. The sleeve 10 has a spherical groove, and the sampling ball 5 is assembled in the spherical groove. The design of the spherical groove allows the sampling ball 5 to rotate stably inside the sampling tube 6, ensuring that the sampling rod 7 can pass smoothly through the through hole at different angles, improving the flexibility and accuracy of sampling. At the same time, the cooperation between the sleeve 10 and the sampling ball 5 further enhances the sealing performance of the sampling tube 6, preventing material from leaking from the gap between the sampling tube 6 and the sampling ball 5 during the sampling process, ensuring the safety and reliability of the sampling process.

[0031] Furthermore, the sleeve 10 is made of brass. Brass has a lower hardness than the stainless steel sampling ball 5, allowing it to withstand certain loads while reducing friction through surface micro-protrusion deformation. This extends the service life of both the sampling ball 5 and the sleeve 10, reducing equipment maintenance costs. Additionally, brass possesses excellent wear resistance and corrosion resistance, enabling it to adapt to the complex conditions of fluidized bed granulation, thus improving the equipment's durability and reliability.

[0032] Furthermore, a cleaning pipe 2 is connected to one end of the sealing pipe 12, and a valve 3 is installed on the cleaning pipe 2. The installation of the cleaning pipe 2 and the valve 3 makes cleaning the sealing pipe 12 more convenient and faster. Operators can pour cleaning fluid into the sealing pipe 12 through the cleaning pipe 2, and then control the discharge of the cleaning fluid through the valve 3, effectively removing residual materials inside the sealing pipe 12, ensuring the cleanliness of the equipment and the accuracy of sampling. Regularly cleaning the sealing pipe 12 in this way can prevent material from accumulating and scaling inside the pipe, reducing equipment wear and the risk of blockage, and extending the service life of the equipment.

[0033] Furthermore, two to four sampling devices are provided on the fluidized bed reactor body 1, and each sampling device is evenly distributed around the axis of the reactor body 1. For example... Figure 3 As shown in the figure, the shaded area represents the sampling range. Multiple sampling devices are evenly distributed around the axis of the fluidized bed reactor 1, enabling omnidirectional sampling of materials at different locations within the reactor 1. This further improves the representativeness of the sampling and provides more comprehensive data support for studying the moisture distribution of the materials. Simultaneously, multiple sampling devices can perform sampling operations at the same time, reducing sampling time and further improving production efficiency, thus meeting the needs of large-scale production.

[0034] Furthermore, the sampling ball 5 is made of 316L stainless steel. 316L stainless steel has excellent corrosion resistance and can work stably for a long time under the complex conditions of fluidized bed granulation, effectively preventing the sampling ball 5 from being corroded and damaged, thus improving the service life and reliability of the equipment.

[0035] The embodiments described in this specification are merely examples of implementations of the inventive concept. The scope of protection of this utility model should not be considered as limited to the specific forms described in the embodiments. The scope of protection of this utility model also extends to equivalent technical means that can be conceived by those skilled in the art based on the inventive concept.

Claims

1. A fluidized bed sampling device, characterized in that: It includes a sealing tube connected to the fluidized bed body, a piston inside the sealing tube, the piston being fixedly connected to a push-pull rod with one end inside the sealing tube, a sampling tube connected to the sealing tube, a rotatable sampling ball inside the sampling tube, and a through hole for the sampling rod to pass through on the sampling ball.

2. The fluidized bed sampling device according to claim 1, characterized in that: A flange is provided at the opening of the sealing pipe, and a push-pull rod is set inside the flange. A sealing ring is provided between the flange and the push rod. The push-pull rod pulls the piston against the end face of the flange.

3. The fluidized bed sampling device according to claim 1, characterized in that: A limiting skirt is provided at the end of the push-pull rod away from the piston. When the piston seals the sampling tube, the skirt abuts against the flange.

4. A fluidized bed sampling device according to any one of claims 1 to 3, characterized in that: A sleeve is fixedly connected inside the sampling tube, and the sleeve has a spherical groove, in which the sampling ball is assembled.

5. A fluidized bed sampling device according to claim 4, characterized in that: The sleeve is made of brass.

6. A fluidized bed sampling device according to any one of claims 1 to 3, characterized in that: A cleaning pipe is connected to one end of the sealing pipe, and a valve is installed on the cleaning pipe.

7. A fluidized bed sampling device according to any one of claims 1 to 3, characterized in that: Two to four sampling devices are installed on the fluidized bed boiler.

8. A fluidized bed sampling device according to any one of claims 1 to 3, characterized in that: The sampling ball is made of 316L stainless steel.

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