Fluidized bed system

Abstract

The present invention relates to the field of fluidized bed technology, and in particular discloses a fluidized bed system, including an air handling unit, a cylinder body, a dust removal unit and a fan, wherein the air handling unit is connected to the cylinder body through an air inlet pipe, the cylinder body is connected to the dust removal unit through an air outlet pipe, the fan is connected to the outlet of the dust removal unit, the cylinder body includes a plurality of cylinder parts connected in sequence, a sealing structure is provided at the connection between two adjacent cylinder parts, and a vacuum feed port, a vacuum discharge structure and a closed sampler are provided on the cylinder body. The above structure provides a fully sealed fluidized bed system with good airtightness, no open ports and no leakage points.

Description

Technical Field

[0001] The invention relates to the technical field of fluidized beds, in particular to a fluidized bed system. Background Art

[0002] At present, the occupational exposure limit (OEL) is the end limit value of occupational hazards, which refers to the permissible exposure level that workers can repeatedly contact for a long time in their occupational activities without causing acute or chronic harm to their health.

[0003] Meaning of OEB4: 10>OEL≥1 μg / m 3 That is, the workers are exposed to less than 10 μg / m 3 .

[0004] The fluidized bed system in the prior art is not airtight enough, and there are leakage problems in each process, which is not conducive to the health of workers. For example, there are connection gaps on the cylinder body, the discharge method is not sealed, and the sampling port is open. Summary of the invention

[0005] In order to overcome the deficiencies of the prior art, the present invention provides a fully sealed fluidized bed system with good airtightness, no open openings and no leakage points.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a fluidized bed system, including an air handling unit, a cylinder body, a dust removal unit and a fan, the air handling unit is connected to the cylinder body through an air inlet pipe, the cylinder body is connected to the dust removal unit through an air outlet pipe, the fan is connected to the outlet of the dust removal unit, the cylinder body includes a plurality of cylinder parts connected in sequence, a sealing structure is provided at the connection between two adjacent cylinder parts, and a vacuum feed port, a vacuum discharge structure and a closed sampler are provided on the cylinder body.

[0007] In the above technical solution, the cylinder wall thickness is thickened to ensure that the cylinder strength itself can withstand a pressure of 10 bar. Compared with the traditional 2 bar explosion relief method, it has two advantages. First, no material will leak to the outside of the equipment; second, the equipment cylinder has no explosion relief port, and the inner wall is smooth and easy to clean.

[0008] As a further configuration of the present invention, the sealing structure includes an upper flange and a lower flange arranged on two adjacent cylinder parts, an inflatable sealing ring is arranged between the upper flange and the lower flange, and explosion-proof buckles are arranged on the corresponding two sides of the upper flange and the lower flange.

[0009] In the above technical solution, the connection between each cylinder part is sealed by an inflatable sealing ring, and explosion-proof buckles are installed on the upper flange and the lower flange, which can be locked with each other after being installed in place.

[0010] As a further configuration of the present invention, the explosion-proof buckle is L-shaped, one end of the explosion-proof buckle is fixedly connected to the upper flange or the lower flange, and the other end is hooked on the lower flange or the upper flange to achieve snap-on connection.

[0011] In the above technical solution, one end of the explosion-proof buckle is integrally arranged with the upper flange or the lower flange to improve the strength, and the other end is hooked on the lower flange or the upper flange to tightly buckle the upper flange and the lower flange together to avoid leakage.

[0012] As a further configuration of the present invention, the explosion-proof buckles on both sides are centrally symmetrically arranged.

[0013] In the above technical solution, the buckling force provided by the explosion-proof buckle is a symmetrical force in opposite directions, and the buckling is more firm and reliable.

[0014] As a further configuration of the present invention, the cylinder parts are respectively a cylinder body, a flap material cylinder and a funnel-shaped buffer cylinder, the vacuum discharging structure includes a material flap rotatably arranged in the flap material cylinder for receiving materials, the flap material cylinder and the buffer cylinder are connected, and a vacuum discharge port and an air supply port opposite to the vacuum discharge port are provided on the buffer cylinder, and the air supply port is connected to the air inlet pipe through an air supply pipe.

[0015] In the above technical solution, when discharging, the dried material falls into the buffer cylinder through the material flap, and is then sucked to the next process for granulation by negative pressure. The entire material transfer process is closed, and there is no leakage of powder. Moreover, compared with the traditional three-way vacuum discharging, the flap discharging can greatly reduce the discharge residue. The vacuum source of the vacuum discharge port is provided by the docking equipment, and the air supply port draws air from the air duct between the air handling unit and the main unit through the air supply pipe, thereby ensuring the sealing of the entire equipment.

[0016] As a further configuration of the present invention, one-way quick shut-off valves are provided on both the air inlet pipe and the air outlet pipe.

[0017] In the above technical solution, a one-way quick-shutoff valve is installed at the position of the air inlet duct and the air outlet duct, which can be quickly closed when the positive pressure in the air duct is detected. In the event of an unexpected explosion, the explosion shock is blocked in the fluidized bed equipment to prevent the explosion shock from causing damage to the equipment connected to the front and rear of the air duct, and to ensure that the material in the fluidized bed will not leak, thereby meeting the overall sealing requirements.

[0018] As a further configuration of the present invention, the closed sampler includes a sampling cylinder having a sampling channel, a sampling valve stem arranged on the sampling channel, and a sampling tube arranged on the side of the sampling cylinder and connected to the sampling channel, the sampling valve stem can move along the axial direction of the sampling cylinder so that its end portion and the inlet of the sampling cylinder form a blocking setting or an unsealing setting, the sampling tube is provided with a blocking structure that forms a blocking setting or an unsealing setting with its outlet, the sampling tube is detachably connected to a sampling bottle, the sampling bottle is provided with a first sampling cavity, the first sampling cavity is connected to the sampling tube, and the first sampling cavity is provided with a closed structure that forms a blocking setting or an unsealing setting with its inlet.

[0019] In the above technical scheme, the sampling bottle of the sampler in the prior art is open, and the materials will be exposed to the outside world during the sampling and inspection process. The closed sampler designed in this invention draws on the principle of αβ valve, and both ports are closed after separation, which minimizes the diffusion of materials to the outside world and blocks the contact between operators and materials.

[0020] As a further configuration of the present invention, the sealed structure includes a first push rod inserted into the first sampling chamber, one end of the first push rod can be sealed with the entrance of the first sampling chamber to form a blocking end, and the other end extends out of the first sampling chamber to form a driving end. A first return spring is sleeved on the first push rod, one end of the first return spring abuts against a first convex ring arranged on the inner wall of the first sampling chamber, and the other end abuts against a second convex ring arranged on the driving end. The first return spring drives the blocking end to be sealed and connected with the entrance of the first sampling chamber.

[0021] As a further configuration of the present invention, the blocking structure includes a second push rod arranged in the sampling tube and a support portion fixed on the inner wall of the sampling tube. One end of the second push rod can be sealed and connected to the outlet of the sampling tube to form a blocking end, and the other end is connected to the support portion through a second return spring to form a connecting end. The second return spring drives the blocking end to cooperate with the outlet seal of the sampling tube while also abutting against the first push rod to form a linkage configuration.

[0022] In the above technical solution, the first push rod passes through the first convex ring and is sealed and connected to the first convex ring through a sealing ring. The first push rod can move along its axial direction. When sampling is required, force is applied to the driving end to push the first push rod to move, so that the blocking end and the entrance of the first sampling chamber are unblocked. At this time, because the second push rod is abutted against the first push rod, when the first push rod moves, the second push rod will also move with it, so that the blocking end and the outlet pushed by the sampling are unblocked, so that it is convenient for the material to come out of the sampling tube and enter the first sampling chamber. After the material enters the first sampling chamber, the driving force is removed, and the first push rod is reset under the action of the first return spring to make the blocking end block the entrance of the first sampling chamber again to prevent the material in the first sampling chamber from leaking. The second push rod is reset under the action of the second return spring to block the outlet of the sampling tube again, so that the sampling tube is in a closed state again, and then the sampling bottle is removed for inspection. The whole process is a closed operation, which minimizes the diffusion of materials to the outside world and blocks the contact between operators and materials. The second return spring and the first return spring are both compression springs.

[0023] As a further configuration of the present invention, the space between the support portion and the outlet of the sampling tube constitutes a second sampling cavity, and the support portion is provided with a through hole connecting the second sampling cavity and the sampling tube.

[0024] In the above technical solution, in order to facilitate the processing of the blocking structure, the part with the blocking structure is separated from the other parts of the sampling tube to form a sampling bottle joint. The sampling bottle joint and the tube wall of the sampling tube are connected by a clamp or a flange, or other fixed connection methods such as welding. The sampling bottle joint and the sampling bottle are detachably connected by a clamp or a flange, and the through hole is provided so that the material in the sampling tube can enter the second sampling cavity.

[0025] As a further configuration of the present invention, the support portion includes a support block for the second return spring to abut against and a connecting rod for fixing the support block on the sampling tube, and a gap exists between the circumferential surface of the support block and the inner wall of the sampling tube to form the through hole.

[0026] In the above technical solution, the support block is suspended in the second sampling cavity through connecting rods. Preferably, the connecting rods are located on the corresponding two sides of the support block. Of course, there can be more connecting rods as long as through holes are left.

[0027] As a further configuration of the present invention, the support block includes a conical head and a cylindrical tail, the bottom surface of the head faces the tail and is integrally connected with the tail, the tail is provided with a concave cavity for inserting the second push rod, and the second return spring is located between the bottom surface of the concave cavity and the second push rod.

[0028] In the above technical solution, the conical head is set to play a guiding role to prevent the support part from obstructing the passage of materials. The inner diameter of the concave cavity is adapted to the outer diameter of the second push rod. The second push rod is embedded in the concave cavity. The concave cavity has both a guiding and limiting effect on the second push rod.

[0029] As a further configuration of the present invention, a first conical surface and a second conical surface that match each other are respectively arranged between the blocking end of the second push rod and the outlet of the sampling tube, the inclination angles of the first conical surface and the second conical surface are consistent, and the second push rod is driven by the second return spring to move toward the direction close to the first push rod so that the first conical surface abuts against the second conical surface.

[0030] In the above technical solution, because the blocking end and the outlet of the sampling tube are sealed, there must be a contact surface between the two, and the contact surface is the first conical surface and the second conical surface. The contact surface is arranged as a conical surface, which can make the blocking end and the inner wall at the outlet of the sampling tube abut more tightly and reliably, and the end with a smaller diameter on the second conical surface faces the sampling bottle.

[0031] As a further configuration of the present invention, a third conical surface and a fourth conical surface that match each other are respectively arranged between the blocking end of the first push rod and the entrance of the first sampling chamber, and the inclination angles of the third conical surface and the fourth conical surface are consistent. Driven by the first return spring, the first push rod moves in a direction away from the second push rod so that the third conical surface abuts against the fourth conical surface.

[0032] In the above technical solution, because the blocking end and the entrance of the first sampling cavity are blocked, there must be a contact surface between the two, and the contact surface is the third conical surface and the fourth conical surface. The contact surface is arranged as a conical surface, which can make the blocking end and the inner wall at the entrance of the first sampling cavity abut more tightly and reliably. The end with a larger diameter on the fourth conical surface faces the sampling bottle connector.

[0033] As a further configuration of the present invention, the diameter of the larger end of the third conical surface is equal to or smaller than the diameter of the smaller end of the second conical surface.

[0034] In the above technical solution, since the blocking end needs to enter the sampling bottle connector to push the second push rod, and the blocking end is truncated cone-shaped, and the third conical surface is the circumferential surface of the truncated cone, the maximum diameter of the blocking end must be less than or equal to the minimum diameter of the second conical surface.

[0035] As a further configuration of the present invention, a fifth conical surface and a sixth conical surface that match each other are respectively arranged between one end of the sampling valve stem and the inlet of the sampling cylinder, and the other end extends out of the sampling cylinder to form a handle. The inclination angles of the fifth conical surface and the sixth conical surface are consistent. A third return spring is sleeved on the sampling valve stem, one end of the third return spring abuts against a first convex portion arranged on the inner wall of the sampling cylinder, and the other end abuts against a second convex portion arranged on the outer circumferential surface of the sampling valve stem. Driven by the third return spring, the fifth conical surface moves along its axial direction so that the fifth conical surface abuts against the sixth conical surface.

[0036] In the above technical scheme, anti-tumor, hormone, sensitizing and other highly active drugs need to strictly avoid drug powder exposure during sampling and testing to prevent operators from long-term exposure to harmful health. When sampling, push the sampling valve stem inward or pull the sampling valve stem outward, the inlet end of the sampling cylinder is opened, that is, the valve mouth is opened, and the drug powder enters the sampling cylinder from the silo, flows through the sampling channel to the sampling tube and finally falls into the second sampling cavity. Release the handle, and the sampling valve stem is reset under the action of the third reset spring, the valve mouth is closed, and then the first push rod is pushed upward to drive the second push rod to move upward together. The mouth of the sampling bottle opens, and the drug powder falls into the first sampling cavity. Release the driving end, and the first push rod and the second push rod are reset under the joint action of the first reset spring and the second reset spring. The bottle mouth is closed, the clamp is released, and the sampling bottle is removed. Both ends are closed, and there is no drug powder residue on the end surface, thereby ensuring that the operator does not touch the drug powder during sampling and inspection.

[0037] As a further configuration of the present invention, a cover plate is provided on the end of the sampling cylinder body opposite to the inlet thereof, and the handle passes through the cover plate to be exposed.

[0038] In the above technical solution, the cover plate is preferably sealed with the sampling valve stem to avoid material leakage.

[0039] As a further configuration of the present invention, a partition is provided in the sampling channel of the sampling cylinder, and the sampling valve stem passes through the partition and is sealed with the partition, so the partition constitutes the first convex portion.

[0040] In the above technical solution, the partition plate and the sampling valve stem are sealed and connected by a sealing ring to further avoid material leakage. The sampling channel has a double seal to improve the airtightness during the sampling process.

[0041] As a further configuration of the present invention, a cleaning unit is also included. The cylinder body includes a top cylinder and a middle cylinder. The cleaning unit includes a cleaning pipe extending through the top cylinder to the middle cylinder. A plurality of nozzles are provided on the cleaning pipe.

[0042] In the above technical solution, the cleaning unit in the prior art has many cleaning dead corners and does not meet the operating procedures with high sealing requirements. The cleaning pipe is fixed inside the cylinder body, which solves the problem that the prior art needs to insert an external cleaning gun and is difficult to deal with dust exposure during the installation process.

[0043] As a further configuration of the present invention, the cleaning unit includes a first cleaning hole arranged on the top cylinder, the first cleaning holes are 4 evenly distributed along the circumference of the top cylinder, and the first cleaning holes are connected to a water pipe.

[0044] In the above technical solution, there are 4 cleaning points around the top cylinder, which can flush all the surfaces of parts that are prone to residual materials to achieve full cleaning coverage.

[0045] As a further configuration of the present invention, the cleaning unit includes a second cleaning hole arranged on the vacuum feed port and the vacuum discharge port and a third cleaning hole arranged on the air inlet pipe and the air outlet pipe, and the second cleaning hole and the third cleaning hole are both connected to water pipes.

[0046] In the above technical solution, cleaning points are set at the vacuum feed port and the vacuum discharge port, the feed and discharge pipes are disassembled and cleaned after being inactivated, and cleaning points are set on the air inlet pipe and the air outlet pipe, which need to be cleaned and inactivated before disassembly.

[0047] As a further configuration of the present invention, the dust removal unit includes a medium-efficiency dust removal cabinet and a high-efficiency dust removal cabinet that are connected to each other, the medium-efficiency dust removal cabinet is connected to the air outlet duct, the high-efficiency dust removal cabinet is connected to the fan, and the filter cartridges in the medium-efficiency dust removal cabinet and the high-efficiency dust removal cabinet are both provided with isolation bags.

[0048] In the above technical solution, F9+H13 double-stage filtration is configured, and the filter cartridge is disassembled and assembled using bag-in-bag-out technology, that is, the filter cartridge is installed into the isolation belt and then taken out of the dust removal cabinet. After cleaning, the filter cartridge is installed into the isolation belt and then put into the dust removal cabinet, which solves the problem of inhaling powder during the disassembly and assembly process.

[0049] The present invention will be further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Attached Figure 1 It is an overall schematic diagram of a specific embodiment of the present invention;

[0051] Attached Figure 2 It is a partial enlarged view of the specific embodiment I of the present invention;

[0052] Attached Figure 3 It is a partial enlarged view of specific embodiment II of the present invention;

[0053] Attached Figure 4 It is a structural cross-sectional view of a closed sampler of a specific embodiment of the present invention when sampling;

[0054] Attached Figure 5 It is a structural cross-sectional view of the closed sampler of a specific embodiment of the present invention when not sampling;

[0055] Attached Figure 6 It is a structural cross-sectional diagram of a sampling bottle according to a specific embodiment of the present invention;

[0056] Attached Figure 7 It is a structural schematic diagram of a cylinder body according to a specific embodiment of the present invention. DETAILED DESCRIPTION

[0057] The specific implementation example of the present invention is Figure 1-7 As shown, a fluidized bed system includes an air handling unit 1, a cylinder body 2, a dust removal unit 3 and a fan 4. The air handling unit 1 is connected to the cylinder body 2 through an air inlet pipe 5, and the cylinder body 2 is connected to the dust removal unit 3 through an air outlet pipe 6. The fan 4 is connected to the outlet of the dust removal unit 3. The cylinder body 2 includes a plurality of cylinder parts connected in sequence, and a sealing structure 7 is provided at the connection between two adjacent cylinder parts. The cylinder body 2 is provided with a vacuum feed port 21, a vacuum discharge structure 22 and a closed sampler 23. The wall thickness of the cylinder body 2 is thickened to ensure that the cylinder body 2 itself has a strength of 10 bar pressure resistance. Compared with the traditional 2 bar explosion relief method, it has two advantages. First, no material will leak to the outside of the equipment; second, the equipment cylinder body 2 has no explosion relief port, and the inner wall is smooth and easy to clean.

[0058] The sealing structure 7 comprises an upper flange 71 and a lower flange 72 arranged on two adjacent cylinder parts, an inflatable sealing ring 73 is arranged between the upper flange 71 and the lower flange 72, an inflatable nozzle 731 is arranged on the inflatable sealing ring 73, and explosion-proof buckles 74 are arranged on the corresponding sides of the upper flange 71 and the lower flange 72. The connection between each cylinder part is sealed by an inflatable sealing ring 73, and explosion-proof buckles 74 are installed on the upper flange 71 and the lower flange 72, which can be locked with each other after being installed in place.

[0059] The explosion-proof buckle 74 is L-shaped, one end of the explosion-proof buckle 74 is fixedly connected to the upper flange 71 or the lower flange 72, and the other end is hooked on the lower flange 72 or the upper flange 71 to achieve a snap connection. One end of the explosion-proof buckle 74 is integrally arranged with the upper flange 71 or the lower flange 72 to improve the strength, and the other end is hooked on the lower flange 72 or the upper flange 71 to tightly buckle the upper flange 71 and the lower flange 72 together to prevent leakage.

[0060] The explosion-proof buckles 74 on both sides are arranged symmetrically to the center. The buckling forces provided by the explosion-proof buckles 74 are symmetrical forces in opposite directions, and the buckling is more firm and reliable.

[0061] The above-mentioned cylinder parts are respectively a cylinder body 24, a flap cylinder 25 and a funnel-shaped buffer cylinder 26. The vacuum discharge structure 22 includes a material flap 251 rotatably arranged in the flap cylinder 25 for receiving materials. The flap cylinder 25 and the buffer cylinder 26 are connected. The buffer cylinder 26 is provided with a vacuum discharge port 261 and an air supply port 262 opposite to the vacuum discharge port 261. The air supply port 262 is connected to the air inlet pipe 5 through the air supply pipe 263. When discharging, the dried material falls into the buffer cylinder 26 through the material flap 251, and is then sucked to the next process for granulation by negative pressure. The entire material transfer process is closed, and there is no leakage of powder. Moreover, compared with the traditional three-way vacuum discharging, the flap discharging can greatly reduce the discharge residue. The vacuum source of the vacuum discharge port 261 is provided by the docking equipment, and the air supply port 262 draws air from the air duct between the air handling unit 1 and the main unit through the air supply pipe 263, thereby ensuring the sealing of the entire equipment.

[0062] The air inlet pipe 5 and the air outlet pipe 6 are both provided with one-way fast shut-off valves 51 and 61. A one-way fast shut-off valve 51 and 61 are respectively installed at the positions of the air inlet pipe 5 and the air outlet pipe 6. When the positive pressure in the air duct is detected, the valve can be quickly closed. When an unexpected explosion occurs, the explosion shock is blocked in the fluidized bed equipment to prevent the explosion shock from causing damage to the equipment connected to the front and rear of the air duct, and ensure that the material in the fluidized bed will not leak, so as to meet the overall sealing requirements.

[0063] like Figure 4-6 As shown, the closed sampler 23 includes a sampling cylinder 231 with a sampling channel 2311, a sampling valve stem 232 arranged on the sampling channel 2311, and a sampling tube 233 arranged on the side of the sampling cylinder 231 and connected to the sampling channel 2311. The sampling valve stem 232 can move along the axial direction of the sampling cylinder 231 so that its end and the inlet of the sampling cylinder 231 form a blocking arrangement or an unsealing arrangement, and the sampling tube 233 is provided with a blocking structure that forms a blocking arrangement or an unsealing arrangement with its outlet. The sampling tube 233 is detachably connected to a sampling bottle 234, and the sampling bottle 234 is provided with a first sampling cavity 2341, which is connected to the sampling tube 233, and the first sampling cavity 2341 is provided with a closed structure that forms a blocking arrangement or an unsealing arrangement with its inlet. In the sampler in the prior art, the sampling bottle 234 is open, and the materials will be exposed to the outside during the sampling and inspection process. However, the closed sampler 23 of the present design draws on the principle of αβ valves, and both ports are closed after separation, which minimizes the diffusion of materials to the outside and blocks the contact between operators and materials.

[0064] The above-mentioned closed structure includes a first push rod 2342 inserted into the first sampling chamber 2341, one end of the first push rod 2342 can be sealed with the entrance of the first sampling chamber 2341 to form a blocking end 2342a, and the other end extends out of the first sampling chamber 2341 to form a driving end 2342b. A first return spring 2343 is sleeved on the first push rod 2342, one end of the first return spring 2343 abuts against a first convex ring 2344 arranged on the inner wall of the first sampling chamber 2341, and the other end abuts against a second convex ring 2345 arranged on the driving end 2342b. The first return spring 2343 drives the blocking end 2342a to be sealed and connected with the entrance of the first sampling chamber 2341.

[0065] The above-mentioned blocking structure includes a second push rod 2331 arranged in the sampling tube 233 and a support part 2332 fixed on the inner wall of the sampling tube 233. One end of the second push rod 2331 can be sealed and connected to the outlet of the sampling tube 233 to form a blocking end 2331a, and the other end is connected to the support part 2332 through a second return spring 2333 to form a connecting end 2331b. The second return spring 2333 drives the blocking end 2331a to seal with the outlet of the sampling tube 233 while also abutting against the first push rod 2342 to form a linkage setting. The first push rod 2342 passes through the first convex ring 2344 and is sealed and connected to the first convex ring 2344 through the sealing ring 01. The first push rod 2342 can move along its axial direction. When sampling is required, force is applied to the driving end 2342b to push the first push rod 2342 to move, so that the blocking end 2342a and the entrance of the first sampling chamber 2341 are unblocked. At this time, because the second push rod 2331 is abutted against the first push rod 2342, when the first push rod 2342 moves, the second push rod 2331 will also move, so that the blocking end 2331a and the outlet of the sampling push are unblocked, so that the material comes out of the sampling tube 233 and enters the first sampling chamber 2341. After the material enters the first sampling chamber 2341, the driving force is removed, and the first push rod 2342 is reset under the action of the first reset spring 2343 so that the blocking end 2342a is blocked at the entrance of the first sampling chamber 2341 again to prevent the material in the first sampling chamber 2341 from leaking. The second push rod 2331 is reset under the action of the second reset spring 2333 and is blocked at the outlet of the sampling tube 233 again to make the sampling tube 233 in a closed state again. Then the sampling bottle 234 is removed for inspection. The whole process is a closed operation, which minimizes the diffusion of materials to the outside and blocks the contact between operators and materials. The second reset spring 2333 and the first reset spring 2343 are both compression springs.

[0066] The space between the support part 2332 and the outlet of the sampling tube 233 constitutes the second sampling cavity 2334, and the support part 2332 is provided with a through hole 2335 connecting the second sampling cavity 2334 and the sampling tube 233. In order to facilitate the processing of the blocking structure, the part with the blocking structure is separated from the other parts of the sampling tube 233 to form a sampling bottle joint 235. The sampling bottle joint 235 and the tube wall of the sampling tube 233 are connected by a clamp or a flange, or by other fixed connection methods such as welding. The sampling bottle joint 235 and the sampling bottle 234 are detachably connected by a clamp or a flange, and the through hole 2335 is provided so that the material in the sampling tube 233 can enter the second sampling cavity 2334.

[0067] The support portion 2332 includes a support block 2336 for the second return spring 2333 to abut against and a connecting rod 2337 for fixing the support block 2336 on the sampling tube 233. There is a gap between the circumferential surface of the support block 2336 and the inner wall of the sampling tube 233 to form the through hole 2335. The support block 2336 is suspended in the second sampling cavity 2334 by the connecting rod 2337. Preferably, the connecting rod 2337 is located on the corresponding two sides of the support block 2336. Of course, more connecting rods 2337 can be provided, as long as the through hole 2335 is reserved.

[0068] The support block 2336 includes a conical head 2336a and a cylindrical tail 2336b, the bottom surface of the head 2336a faces the tail 2336b and is integrally connected with the tail 2336b, the tail 2336b is provided with a concave cavity 2336c for inserting the second push rod 2331, and the second return spring 2333 is located between the bottom surface of the concave cavity 2336c and the second push rod 2331. The conical configuration of the head 2336a is to play a guiding role to prevent the support portion 2332 from obstructing the passage of materials, the inner diameter of the concave cavity 2336c is adapted to the outer diameter of the second push rod 2331, and the second push rod 2331 is embedded in the concave cavity 2336c, and the concave cavity 2336c has both a guiding role and a limiting role for the second push rod 2331.

[0069] A first conical surface 2331c and a second conical surface 2338 are provided between the blocking end 2331a of the second push rod 2331 and the outlet of the sampling tube 233, respectively. The first conical surface 2331c and the second conical surface 2338 have the same inclination angle. The second push rod 2331 moves toward the direction close to the first push rod 2342 under the drive of the second return spring 2333 so that the first conical surface 2331c abuts against the second conical surface 2338. Because the blocking end 2331a and the outlet of the sampling tube 233 are blocked, there must be a contact surface between the two, and the contact surface is the first conical surface 2331c and the second conical surface 2338. The contact surface is provided as a conical surface, which can make the blocking end 2331a and the inner wall at the outlet of the sampling tube 233 abut more tightly and reliably. The end with a smaller diameter on the second conical surface 2338 faces the sampling bottle 234.

[0070] A third conical surface 2342c and a fourth conical surface 2346 that match each other are respectively arranged between the blocking end 2342a of the above-mentioned first push rod 2342 and the entrance of the first sampling chamber 2341. The inclination angles of the third conical surface 2342c and the fourth conical surface 2346 are consistent. Driven by the first return spring 2343, the first push rod 2342 moves in the direction away from the second push rod 2331 so that the third conical surface 2342c abuts against the fourth conical surface 2346. Because the blocking end 2342a and the entrance of the first sampling chamber 2341 are blocked, there must be a contact surface between the two, and the contact surface is the third conical surface 2342c and the fourth conical surface 2346. The contact surface is arranged as a conical surface, which can make the blocking end 2342a and the inner wall at the entrance of the first sampling chamber 2341 abut more tightly and reliably. The end with a larger diameter on the fourth conical surface 2346 faces the sampling bottle connector 235.

[0071] The diameter of the larger end of the third conical surface 2342c is equal to or smaller than the diameter of the smaller end of the second conical surface 2338. Since the blocking end 2342a needs to enter the sampling bottle connector 235 to push the second push rod 2331, and the blocking end 2342a is in a truncated cone shape, and the third conical surface 2342c is the circumferential surface of the truncated cone, the maximum diameter of the blocking end 2342a must be smaller than or equal to the minimum diameter of the second conical surface 2338.

[0072] A fifth conical surface 2321 and a sixth conical surface 2312 that match each other are respectively arranged between one end 2322 of the sampling valve stem 232 and the entrance of the sampling cylinder 231, and the other end extends out of the sampling cylinder 231 to form a handle 2323. The inclination angles of the fifth conical surface 2321 and the sixth conical surface 2312 are consistent. A third reset spring 2324 is sleeved on the sampling valve stem 232, and one end of the third reset spring 2324 abuts against a first convex portion 2313 arranged on the inner wall of the sampling cylinder 231, and the other end abuts against a second convex portion 2325 arranged on the outer circumferential surface of the sampling valve stem 232, and the second convex portion 2325 is composed of a nut and a gasket. Driven by the third reset spring 2324, the fifth conical surface 2321 moves along its axial direction so that the fifth conical surface 2321 abuts against the sixth conical surface 2312. When sampling and testing highly active drugs such as anti-tumor, hormone, and allergenic drugs, it is necessary to strictly avoid drug powder exposure to prevent operators from long-term exposure to harmful health. When sampling, push the sampling valve stem 232 inward or pull it outward, the inlet end of the sampling cylinder 231 opens, that is, the valve port opens, and the drug powder enters the sampling cylinder 231 from the silo, flows through the sampling channel 2311 to the sampling tube 233, and finally falls into the second sampling cavity 2334. Release the handle 2323, and the sampling valve stem 232 is reset under the action of the third reset spring 2324, and the valve port is opened. Close, then push the first push rod 2342 upward, driving the second push rod 2331 to move upward together, the mouth of the sampling bottle 234 opens, and the powder falls into the first sampling cavity 2341, release the driving end 2342b, and under the joint action of the first return spring 2343 and the second return spring 2333, the first push rod 2342 and the second push rod 2331 are reset, the mouth of the bottle is closed, the clamp is released, and the sampling bottle 234 is removed. Both ends are closed, and there is no powder residue on the end surface, thereby ensuring that the operator does not touch the powder during the sampling and inspection process.

[0073] The end of the sampling cylinder 231 opposite to the inlet is covered with a cover plate 2314, and the handle 2323 is exposed through the cover plate 2314. Preferably, the cover plate 2314 is sealed with the sampling valve stem 232 to prevent material leakage.

[0074] A partition 2313 is provided in the sampling channel 2311 of the sampling cylinder 231, and the sampling valve stem 232 passes through the partition 2313 and seals with it, so the partition 2313 constitutes the first convex portion 2313. The partition 2313 and the sampling valve stem 232 are sealed and connected by a sealing ring 2315 to further prevent material leakage. The sampling channel 2311 has a double seal to improve the airtightness during the sampling process.

[0075] The fluidized bed system also includes a cleaning unit, wherein the cylinder body 24 includes a top cylinder 241 and a middle cylinder 242, and the cleaning unit includes a cleaning pipe 243 extending through the top cylinder 241 to the middle cylinder 242, and a plurality of nozzles are provided on the cleaning pipe 243. The cleaning unit in the prior art has many cleaning dead angles and does not meet the operation process with high sealing requirements. The cleaning pipe 243 is fixed inside the cylinder body 24, which solves the problem that the prior art needs to insert an external cleaning gun and is difficult to handle dust exposure during the installation process.

[0076] The cleaning unit includes four first cleaning holes 2411 arranged on the top cylinder 241, and the first cleaning holes 2411 are evenly distributed along the circumference of the top cylinder 241. The first cleaning holes 2411 are connected to a water pipe 2412. The top cylinder 241 is surrounded by four cleaning points, which can flush all parts surfaces that are prone to residual materials, achieving full cleaning coverage.

[0077] The cleaning unit includes a second cleaning hole provided on the vacuum feed port 21 and the vacuum discharge port 261 and a third cleaning hole provided on the air inlet pipe 5 and the air outlet pipe 6, and the second cleaning hole and the third cleaning hole are both connected to water pipes. Cleaning points are provided on the vacuum feed port 21 and the vacuum discharge port 261, and the feed and discharge pipes are disassembled and cleaned after being inactivated. Cleaning points are provided on the air inlet pipe 5 and the air outlet pipe 6, and cleaning and inactivation are required before disassembly.

[0078] The dust removal unit 3 includes a medium-efficiency dust removal cabinet 31 and a high-efficiency dust removal cabinet 32 ​​connected to each other. The medium-efficiency dust removal cabinet 31 is connected to the air outlet duct 6, and the high-efficiency dust removal cabinet 32 ​​is connected to the fan 4. The filter cartridges in the medium-efficiency dust removal cabinet 31 and the high-efficiency dust removal cabinet 32 ​​are both provided with isolation bags. It is equipped with F9+H13 double-stage filtration, and the filter cartridge is disassembled and assembled using bag-in-bag-out technology, that is, the filter cartridge is installed in the isolation belt and then taken out of the dust removal cabinet. After cleaning, the filter cartridge is installed in the isolation belt and then put into the dust removal cabinet, which solves the problem of inhaling powder during the disassembly process.

[0079] The present invention is not limited to the above-mentioned specific implementation modes. A person skilled in the art may adopt other various specific implementation modes to implement the present invention based on the contents disclosed in the present invention, or any simple changes or modifications made to the design structure and concept of the present invention shall fall within the protection scope of the present invention.

Claims

1. A fluidized bed system, comprising an air handling unit, a cylinder, a dust removal unit and a fan, wherein the air handling unit is connected to the cylinder through an air inlet pipe, the cylinder is connected to the dust removal unit through an air outlet pipe, and the fan is connected to the outlet of the dust removal unit, characterized in that: The cylinder body includes a plurality of cylinder parts connected in sequence, a sealing structure is provided at the connection between two adjacent cylinder parts, a vacuum feed port, a vacuum discharge structure and a closed sampler are provided on the cylinder body; a one-way quick shut-off valve is provided on both the air inlet pipe and the air outlet pipe; the closed sampler includes a sampling cylinder body with a sampling channel, a sampling valve stem arranged on the sampling channel, and a sampling tube arranged on the side of the sampling cylinder body and connected with the sampling channel, the sampling valve stem can move along the axial direction of the sampling cylinder body so that its end portion forms a blocking setting or an unsealing setting with the inlet of the sampling cylinder body, the sampling tube is provided with a blocking structure forming a blocking setting or an unsealing setting with its outlet, the sampling tube is detachably connected with a sampling bottle, a first sampling cavity is provided on the sampling bottle, the first sampling cavity is connected with the sampling tube, and a closed structure forming a blocking setting or an unsealing setting with its inlet is provided on the first sampling cavity.

2. The fluidized bed system according to claim 1, characterized in that: The sealing structure comprises an upper flange and a lower flange arranged on two adjacent cylinder parts, an inflatable sealing ring is arranged between the upper flange and the lower flange, and explosion-proof buckles are arranged on corresponding sides of the upper flange and the lower flange.

3. The fluidized bed system according to claim 2, characterized in that: The explosion-proof buckle is L-shaped, one end of the explosion-proof buckle is fixedly connected to the upper flange or the lower flange, and the other end is hooked on the lower flange or the upper flange to achieve clamping.

4. The fluidized bed system according to claim 3, characterized in that: The explosion-proof buckles on both sides are arranged symmetrically to the center.

5. The fluidized bed system according to any one of claims 1 to 4, characterized in that: The cylinder parts respectively include a cylinder body, a flap material cylinder and a funnel-shaped buffer cylinder. The vacuum discharging structure includes a material flap rotatably arranged in the flap material cylinder for receiving materials. The flap material cylinder is connected to the buffer cylinder. A vacuum discharge port and an air supply port opposite to the vacuum discharge port are provided on the buffer cylinder. The air supply port is connected to the air inlet pipe through an air supply pipe.

6. The fluidized bed system according to claim 1, characterized in that: The sealed structure includes a first push rod inserted into the first sampling cavity, one end of the first push rod can be sealed with the entrance of the first sampling cavity to form a blocking end, and the other end extends out of the first sampling cavity to form a driving end. A first return spring is sleeved on the first push rod, one end of the first return spring abuts against a first convex ring arranged on the inner wall of the first sampling cavity, and the other end abuts against a second convex ring arranged on the driving end. The first return spring drives the blocking end to be sealed and connected with the entrance of the first sampling cavity.

7. The fluidized bed system according to claim 6, characterized in that: The blocking structure includes a second push rod arranged in the sampling tube and a support part fixed on the inner wall of the sampling tube. One end of the second push rod can be sealed and connected to the outlet of the sampling tube to form a blocking end, and the other end is connected to the support part through a second return spring to form a connecting end. The second return spring drives the blocking end to cooperate with the outlet seal of the sampling tube while also abutting against the first push rod to form a linkage setting.

8. The fluidized bed system according to claim 7, characterized in that: The space between the support part and the outlet of the sampling tube constitutes a second sampling cavity, and the support part is provided with a through hole connecting the second sampling cavity and the sampling tube.

9. The fluidized bed system according to claim 8, characterized in that: The support portion includes a support block for the second return spring to abut against and a connecting rod for fixing the support block on the sampling tube. A gap exists between the circumferential surface of the support block and the inner wall of the sampling tube to form the through hole.

10. The fluidized bed system according to claim 9, characterized in that: The support block includes a conical head and a cylindrical tail, the bottom surface of the head faces the tail and is integrally connected with the tail, the tail is provided with a concave cavity for inserting the second push rod, and the second return spring is located between the bottom surface of the concave cavity and the second push rod.

11. The fluidized bed system according to any one of claims 7 to 10, characterized in that: A first conical surface and a second conical surface that match each other are respectively arranged between the blocking end of the second push rod and the outlet of the sampling tube. The inclination angles of the first conical surface and the second conical surface are consistent. Driven by the second return spring, the second push rod moves toward the direction close to the first push rod so that the first conical surface abuts against the second conical surface.

12. The fluidized bed system according to claim 11, characterized in that: A third conical surface and a fourth conical surface that match each other are respectively arranged between the blocking end of the first push rod and the entrance of the first sampling chamber. The inclination angles of the third conical surface and the fourth conical surface are consistent. The first push rod is driven by the first return spring to move in a direction away from the second push rod so that the third conical surface abuts against the fourth conical surface.

13. The fluidized bed system according to claim 12, characterized in that: The diameter of the larger end of the third conical surface is equal to or smaller than the diameter of the smaller end of the second conical surface.

14. The fluidized bed system according to claim 1, characterized in that: A fifth conical surface and a sixth conical surface that match each other are respectively arranged between one end of the sampling valve stem and the inlet of the sampling cylinder, and the other end extends out of the sampling cylinder to form a handle. The inclination angles of the fifth conical surface and the sixth conical surface are consistent. A third return spring is sleeved on the sampling valve stem, one end of the third return spring abuts against a first convex portion arranged on the inner wall of the sampling cylinder, and the other end abuts against a second convex portion arranged on the outer circumferential surface of the sampling valve stem. Driven by the third return spring, the fifth conical surface moves along its axial direction so that the fifth conical surface abuts against the sixth conical surface.

15. The fluidized bed system according to claim 14, characterized in that: The end of the sampling cylinder body opposite to the inlet is covered with a cover plate, and the handle passes through the cover plate to be exposed.

16. The fluidized bed system according to claim 14 or 15, characterized in that: A partition is arranged in the sampling channel of the sampling cylinder, and the sampling valve stem passes through the partition and is sealed with the partition, so the partition constitutes the first convex part.

17. The fluidized bed system according to claim 1 or 2 or 3 or 4 or 6 or 7 or 8 or 9 or 10 or 12 or 13 or 14 or 15, characterized in that: It also includes a cleaning unit. The cylinder body includes a top cylinder and a middle cylinder. The cleaning unit includes a cleaning pipe extending through the top cylinder to the middle cylinder. A plurality of nozzles are arranged on the cleaning pipe.

18. The fluidized bed system according to claim 17, characterized in that: The cleaning unit includes a first cleaning hole arranged on the top cylinder, wherein the first cleaning holes are four and evenly distributed along the circumference of the top cylinder, and a water pipe is connected to the first cleaning hole.

19. The fluidized bed system according to claim 17, characterized in that: The cleaning unit comprises a second cleaning hole arranged on the vacuum feed port and the vacuum discharge port and a third cleaning hole arranged on the air inlet pipe and the air outlet pipe, and the second cleaning hole and the third cleaning hole are both connected to water pipes.

20. The fluidized bed system according to claim 1 or 2 or 3 or 4 or 6 or 7 or 8 or 9 or 10 or 12 or 13 or 14 or 15 or 18 or 19, characterized in that: The dust removal unit includes a medium-efficiency dust removal cabinet and a high-efficiency dust removal cabinet which are connected to each other. The medium-efficiency dust removal cabinet is connected to an air outlet duct, and the high-efficiency dust removal cabinet is connected to a fan. Isolation bags are provided on the filter cartridges in the medium-efficiency dust removal cabinet and the high-efficiency dust removal cabinet.

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