A rapid manufacturing method for a spiral fluidized shortening assembly of a flash dryer

Abstract

The application discloses a kind of flash dryer helical fluidization shortening assembly rapid manufacturing method, belong to air flow drying equipment technical field.Mainly including preparation large-diameter flanging connector, small-diameter flanging connector, circular table wind shield, utilize special positioning device transverse fixed small-diameter flanging connector, utilize special positioning device fixed circular table wind shield position, utilize special positioning device fixed large-diameter flanging connector position, the manufacturing method of the application realizes the helical fluidization shortening assembly fast and accurate splicing, fast positioning, fast inside and outside bidirectional welding, suppress thermal deformation and other functions, in the helical fluidization shortening assembly manufacturing field with good practical value and application prospect.

Description

[0001] This invention application is a divisional application of application number 202411949931.6, filed on December 27, 2024, entitled "A Flash Dryer and a Rapid Manufacturing Method for its Spiral Fluidized Pitch Component". Technical Field

[0002] This invention belongs to the technical field of airflow drying equipment. Specifically, it relates to a flash dryer with a short spiral airflow pitch, good drying effect, small overall size, significantly reduced manufacturing cost, and is particularly suitable for space-constrained places such as laboratories. It also relates to a rapid manufacturing method for its spiral fluidization pitch reduction component. Background Technology

[0003] Flash dryers are high-efficiency drying equipment that integrates drying and fluidization technologies. They are widely used in the chemical, pharmaceutical, and food industries for the rapid drying of powdery, granular, and fibrous materials. Their working principle is based on the "flash evaporation" phenomenon, which uses a high-temperature airflow to rapidly evaporate moisture from the surface of wet materials, thereby achieving rapid drying.

[0004] Chinese patent CN206496606U, authorized on September 15, 2017, entitled "A Flash Dryer," discloses the structure and working principle of a traditional flash dryer. It mainly includes: an air supply device, a material dispersing mechanism, a material separation device, and a dust removal device. The air supply device comprises a blower, a heater, and an air distributor arranged sequentially. The blower draws in external air, the heater heats the drawn air, and the air distributor adjusts the output of hot air. The air distributor in the air supply device is connected to the bottom side of the dryer shell. The dryer shell is equipped with a structure at the bottom and a screw feeder in the middle. The screw feeder is used to feed the material into the dryer shell. The material dispersing structure is used to disperse the material. The material separation device includes a classifier and a cyclone separator. The classifier is connected to the top of the dryer shell, and the cyclone separator is connected to the classifier. The classifier is used to classify the material, and the cyclone separator is used to separate the material. The dust removal device includes a bag filter, an induced draft fan, and an induced draft duct. The bag filter is connected to the top of the cyclone separator through a pipe, the induced draft fan is connected to the bag filter through a pipe, and the induced draft duct is connected to the induced draft fan.

[0005] Traditional flash dryers, designed to maintain material in a fluidized state for an extended period (to improve drying efficiency), often feature tall and large drying chambers, resulting in a large footprint. The drying chamber alone can be approximately 2 meters high, and the entire unit occupies about 8-9 square meters. This bulky size often requires significant space, a drawback particularly pronounced in space-constrained environments such as laboratories. To address this issue, many laboratories have had to specifically seek out or modify large spaces to house traditional dryers, increasing site costs and disrupting the overall laboratory layout. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing technologies by providing a flash dryer with a short spiral airflow pitch, good drying effect, small overall size, significantly reduced manufacturing cost, and particularly suitable for space-constrained locations such as laboratories. The invention also relates to a rapid manufacturing method for its spiral fluidization pitch reduction component.

[0007] This invention is achieved through the following technical solution: A flash dryer includes a control system for controlling the operation of the dryer, a drying chamber for drying wet materials, a feeding system for conveying wet materials to the drying chamber, a stirring and crushing system for stirring and crushing the wet materials inside the drying chamber, a fan system for providing drying airflow to the dryer, and a dust removal system for capturing and separating materials. The hot air from the fan system enters the drying chamber through a primary centrifugal force enhancement device, and a spiral fluidizing tension reduction assembly is installed at the upper end of the drying chamber in a sealed connection with it. The spiral fluidized tension reduction assembly includes a frustum windshield, a large-diameter flanged connector that is sealed and fixed to the lower end of the frustum windshield, and a small-diameter flanged connector that is sealed and fixed to the upper end of the frustum windshield; the small-diameter flanged connector is sealed and connected to the dust removal system via a two-stage centrifugal force strengthening device.

[0008] Preferably, the taper α of the frustum windshield is 32°-45°.

[0009] Preferably, both the flanged end face of the large-diameter flanged connector and the flanged end face of the small-diameter flanged connector are provided with grooves for installing sealing rings; the large-diameter flanged connector is sealed and fixed to the upper end of the drying chamber by means of a clamp, and the small-diameter flanged connector is sealed and fixed to the secondary centrifugal force strengthening device by means of a clamp.

[0010] Preferably, the primary centrifugal force enhancing device is a volute device, including a primary volute housing with an air inlet, an air outlet, and an installation port, and a guide cone is fixedly provided at the rotation center position of the primary volute housing; The secondary centrifugal force enhancement device is also a volute device, including a secondary volute housing with an air inlet and an air outlet, and a centrifugal guide assembly fixed at the rotation center of the secondary volute housing; the centrifugal guide assembly includes a hollow column fixed integrally with the secondary volute housing and a hollow guide cone fixed at the free end of the hollow column.

[0011] A rapid manufacturing method for a spiral fluidized bed assembly of a flash dryer includes the following steps. Step 1: Prepare large-diameter flanged connectors and small-diameter flanged connectors in advance for later use; Step 2: Prepare the frustum windshield; cut out the fan ring and make it round, then align the two radial edges and weld them together to obtain the frustum windshield; Step 3: Use a special positioning device to fix the small-diameter flanged connector horizontally, with the flanged end of the small-diameter flanged connector facing downwards; Step 4: Assemble the frustum windshield coaxially above the small-diameter flanged connector, and use a special positioning device to fix the position of the frustum windshield. Step 5: Assemble the large-diameter flanged connector coaxially above the truncated cone windshield and fix its position using a special positioning device; Step 6: Spot weld small-diameter welds and spot weld large-diameter welds; Step 7: Weld small-diameter seams all the way to the outside, and weld large-diameter seams all the way to the outside. Step 8: Weld small-diameter seams all the way to the inside, and weld large-diameter seams all the way to the inside. Step 9: Remove the spiral fluidized bed assembly; the spiral fluidized bed assembly welding is now complete.

[0012] Preferably, the dedicated positioning device includes a worktable with a hollow support base fixedly mounted, and a support frame located on both sides of the hollow support base and fixedly connected to the worktable. The hollow support base is coaxially provided with a small-diameter lock for locking the small-diameter flanged connector, and the small-diameter lock is connected to the bearing of the hollow support base; the two support frames are provided with a feeding ring that can slide up and down along the support frame, and the feeding ring is coaxially provided with a large-diameter lock for locking the large-diameter flanged connector, and the large-diameter lock is connected to the bearing of the feeding ring; above the feeding ring, the two support frames are also provided with a frustum pressing assembly that can slide up and down along the support frame, and a support assembly that cooperates with the frustum pressing assembly is fixedly provided on the hollow support base. The support assembly is used to support the frustum windshield, and the support assembly is an avoidable support assembly.

[0013] Preferably, the small-diameter buckle includes a small-diameter buckle body and a small-diameter elastic retaining ring with a buckle. The small-diameter elastic retaining ring is connected to the small-diameter buckle body via a transition connecting section. The free end of the small-diameter elastic retaining ring is stepped, and the small-diameter stepped groove of the small-diameter elastic retaining ring contacts the flanged end of the small-diameter flanged connector. The large-diameter buckle includes a large-diameter buckle body and a large-diameter elastic retaining ring with a second buckle. The large-diameter elastic retaining ring is connected to the large-diameter buckle body via a second transition connecting section. The free end of the large-diameter elastic retaining ring is hook-shaped, and the hook part of the large-diameter elastic retaining ring is used to hook the flange end of the large-diameter flange connector.

[0014] Preferably, the small latch body is connected to the inner ring bearing of the hollow support seat via a small-diameter bearing; the large latch body is connected to the inner ring bearing of the feeding ring via a large-diameter bearing.

[0015] Preferably, the feeding ring includes a feeding ring body and lower sliders fixed at both ends of the feeding ring body and sleeved on the support frame, and a lower locking member is installed on one or both lower sliders.

[0016] Preferably, the supporting component includes a fixing ring fixed on a hollow support base, and multiple claw supports are evenly distributed in the circumferential direction on the fixing ring. Each claw support is connected to a claw that can rotate relative to the claw support via a glass ball screw. The multiple claws together support the frustum windshield that is coaxially arranged with the small-diameter flanged connector. The frustum clamping assembly includes a horizontal bar with both ends slidably connected to the support frame via upper sliders. A vertical bar is fixedly installed on the horizontal bar, and multiple outwardly inclined forks are evenly distributed on the free end of the vertical bar. An upper locking component is installed on one or both upper sliders.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. The design of the spiral fluidized pitch reduction component of this invention has a screw compression and acceleration effect on the airflow in the drying chamber. During the spiral ascent of the airflow, the screw pitch is suddenly shortened by the spiral fluidized pitch reduction component, and the residence time of the material in the drying chamber is extended, thereby achieving a significant reduction in the volume of the drying chamber while ensuring the high-efficiency drying performance of the dryer.

[0018] 2. The high-speed and stable drying airflow from the spiral fluidized narrowing assembly then enters the secondary centrifugal force enhancement device. Under the action of the secondary centrifugal force enhancement device, the centrifugal force of the high-speed rotating airflow is further enhanced. This centrifugal force will promote the material to have more complete contact with the hot air, thereby further improving the material drying efficiency.

[0019] 3. The spiral fluidization reduction assembly and the two-stage centrifugal force enhancement device improve the airflow treatment and separation effect, enabling more drying to be completed in a smaller space, significantly reducing the size of the equipment, and at the same time greatly reducing the equipment manufacturing cost and energy consumption.

[0020] 4. The flash dryer of this invention occupies an area of ​​only about 1.6 square meters and the drying chamber is only about 0.8 meters high; the drying chamber is small in size and easy to lay out; the whole machine occupies little space, is highly flexible, practical, competitive in the market, and has a wide range of applications, especially suitable for places with limited space such as laboratories and small factories.

[0021] 5. The dedicated positioning device of this invention enables rapid and precise assembly, rapid positioning, and rapid bidirectional welding of the helical fluidized pitch reduction assembly, and can effectively suppress welding deformation caused by thermal stress. The reasonable and ingenious structural design greatly improves the production efficiency of the helical fluidized pitch reduction assembly, significantly reduces the labor intensity of workers, significantly reduces workers' operating time and operation errors, and ensures high precision and high quality in the welding process, thereby effectively guaranteeing the manufacturing quality of the helical fluidized pitch reduction assembly.

[0022] 6. The special positioning device of this invention can realize the welding method of "the welding gun does not move and the workpiece moves", which greatly alleviates the welding difficulty of circumferential welding, reduces the professional skill requirements of welding personnel, and effectively reduces production costs.

[0023] 7. The dedicated positioning device of this invention enables a single person to complete the welding work of the spiral fluidized pitch reduction component, effectively freeing up human resources and further reducing the production cost of enterprises.

[0024] 8. The special positioning device of this invention is easy to implement, has low cost, and is convenient and quick to operate. It has good practical value and application prospects in the field of spiral fluidized narrow-pitch component manufacturing. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the flash dryer system of the present invention.

[0026] Figure 2 This is a schematic diagram of the flash dryer structure of the present invention.

[0027] Figure 3 This is the present invention. Figure 2 Enlarged view of point A in the middle.

[0028] Figure 4 This is the present invention. Figure 2 Enlarged view of section B in the middle.

[0029] Figure 5 This is a schematic diagram of the spiral fluidized pitch reduction component of the present invention.

[0030] Figure 6 This is a schematic diagram of the assembly structure of the spiral fluidization pitch reduction component and the secondary centrifugal force enhancement device of the present invention.

[0031] Figure 7 This is a schematic diagram of the front view structure of the special positioning device of the present invention.

[0032] Figure 8 This is a schematic diagram of the three-dimensional orientation of the positioning device of the present invention.

[0033] Figure 9 This is the present invention. Figure 8 Enlarged view of point C in the middle.

[0034] Figure 10 This is a cross-sectional view of the positioning device of the present invention.

[0035] Figure 11 This is the present invention. Figure 10 Enlarged view of point D in the middle.

[0036] Figure 12 This is the present invention. Figure 10 Enlarged view of point E in the middle.

[0037] Figure 13 This is a schematic diagram of the three-dimensional structure of the small-diameter locking buckle of the special positioning device of this invention. Figure 1 .

[0038] Figure 14 This is a schematic diagram of the three-dimensional structure of the small-diameter locking buckle of the special positioning device of this invention. Figure 2 .

[0039] Figure 15 This is a schematic diagram showing the state when the small-diameter flanged connector is positioned and the large-diameter flanged connector is placed according to the present invention.

[0040] Figure 16 This is a schematic diagram showing the state of the present invention when the small-diameter flanged connector is positioned and the large-diameter flanged connector and the frustum windshield are placed.

[0041] Figure 17 This is a schematic diagram of the state when the truncated cone windshield of the present invention is positioned.

[0042] Figure 18 This is a schematic diagram showing the state of the three components of the present invention—the frustum windshield, the large-diameter flanged connector, and the small-diameter flanged connector—when assembled and positioned.

[0043] In the diagram: 1. Feeding system; 21. Agitator motor; 22. Dispersing agitator; 23. Bearing mounting box; 31. Blower; 32. Exhaust fan; 33. Heater; 4. Drying chamber; 5. Secondary centrifugal force enhancement device; 51. Secondary volute housing; 513. Hollow column; 514. Hollow guide cone; 61. Cyclone separator; 611. Dry material collector; 62. Bag filter; 7. Primary centrifugal force enhancement device; 71. Primary volute housing; 711. Primary volute body; 712. Volute mounting base; 72. Guide cone; 8. Spiral fluidization reduction assembly; 81. Frustum baffle; 82. Large-diameter flanged connector; 83. Small-diameter flanged connector; 84. Small-diameter weld; 85. Large-diameter weld; 9. Special positioning device; 911. Hollow support base; 912. Workbench 914. Support frame; 92. Small-diameter latch; 921. Small-diameter latch body; 922. Transition connection section one; 923. Small-diameter elastic retaining ring; 9231. Small-diameter stepped groove; 924. Hook and loop one; 93. Support assembly; 931. Fixing ring; 932. Support claw support; 933. Bead screw; 934. Support claw; 94. Large-diameter latch; 941. Large-diameter latch body; 942. Transition connecting section two; 943, large-diameter elastic retaining ring; 9431, hook; 944, buckle two; 95, feed ring; 951, feed ring body; 952, lower slider; 953, lower locking component; 96, frustum clamping assembly; 961, upper slider; 962, crossbar; 963, vertical bar; 964, fork claw; 965, upper locking component; 971, small-diameter bearing; 972, large-diameter bearing. Detailed Implementation

[0044] To enable readers to better understand the design intent of this invention, the technical solutions described below are further described in conjunction with the accompanying drawings and embodiments. It should be noted that the directional terms that may appear in the following paragraphs, including but not limited to "up," "down," "left," "right," "front," and "back," are based on the visual orientation shown in the accompanying drawings and should not be considered as limiting the scope of protection or technical solutions of this invention. Their purpose is merely to facilitate a better understanding of the technical solutions described in this invention by those skilled in the art.

[0045] In the description of this specification, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances and in conjunction with common knowledge in the field, design specifications, standard documents, etc.

[0046] Example 1

[0047] like Figures 1 to 6 As shown, a flash dryer includes a control system for controlling the operation of the dryer, a drying chamber 4 for drying wet materials, a feeding system 1 for conveying wet materials to the drying chamber 4, a stirring and crushing system for stirring and crushing the wet materials inside the drying chamber 4, a fan system for providing drying airflow to the dryer, and a dust removal system for capturing and separating materials. Hot air from the fan system enters the drying chamber 4 via a primary centrifugal force enhancement device 7. A spiral fluidizing tension reduction assembly 8 is installed at the upper end of the drying chamber 4 and is sealed to it. In this embodiment, the spiral fluidizing tension reduction assembly 8 includes a frustum-shaped windshield 81, a large-diameter flanged connector 82 sealed and fixed to the lower end of the frustum-shaped windshield 81, and a small-diameter flanged connector 83 sealed and fixed to the upper end of the frustum-shaped windshield 81. The small-diameter flanged connector 83 is sealed to the dust removal system via a secondary centrifugal force enhancement device 5.

[0048] Specifically, the lower end of the frustum-shaped windshield 81 is sealed and fixed to the large-diameter flanged connector 82 by welding, and the upper end of the frustum-shaped windshield 81 is sealed and fixed to the small-diameter flanged connector 83 by welding. The weld between the frustum-shaped windshield 81 and the large-diameter flanged connector 82 is a large-diameter weld 85, and the weld between the frustum-shaped windshield 81 and the small-diameter flanged connector 83 is a small-diameter weld 84. To ensure the airtightness of the spiral fluidized tension reduction assembly 8, both the small-diameter weld 84 and the large-diameter weld 85 require two full welding operations, one from the outside and one from the inside.

[0049] The working principle of this embodiment is as follows: Hot air from the fan system enters the drying chamber 4 tangentially and at a certain spiral speed under the action of the first-stage centrifugal force enhancement device 7. Particles with low moisture content and small particle size are carried upward by the rotating airflow and are dried during the ascent. Inside the drying chamber 4, the stirring and crushing system thoroughly disperses larger and wetter materials. The spiral airflow generates strong shearing, blowing, and rotational effects on the dispersed materials. The materials are subjected to complex motions such as centrifugation, shearing, collision, and friction, forming microparticles. In this process, the materials are dried. Subsequently, the dispersed materials rise in a fluidized state. After rising to a certain height, they enter the spiral fluidization pitch reduction component 8. During the spiral ascent, the pitch of the airflow is suddenly shortened by the spiral fluidization pitch reduction component 8, forcing a longer residence time of the materials in the drying chamber, thereby enhancing the rapid heat transfer of the materials. In other words, the design of the spiral fluidization pitch reduction component 8 can compress the pitch of the rotating airflow, thereby increasing the drying time and achieving a good drying effect. The secondary centrifugal force enhancement device 5 at the top can enhance the centrifugal force at the top of the drying chamber, allowing the material to move continuously along the edge of the drying cylinder, promoting further and more thorough contact between the material and the hot air, thereby further improving the drying efficiency. The dried material enters the dust removal system, which typically collects the material in stages and ultimately discharges the clean exhaust gas.

[0050] In this embodiment, the design of the spiral fluidized bed reducing component compresses and accelerates the airflow within the drying chamber. As the airflow spirals upward, the spiral fluidized bed reducing component abruptly shortens the pitch, extending the residence time of the material within the drying chamber. This achieves a significant reduction in the drying chamber's volume while maintaining high-efficiency drying performance. The high-speed, stable drying airflow exiting the spiral fluidized bed reducing component then enters the secondary centrifugal force enhancement device. Under the action of the secondary centrifugal force enhancement device, the centrifugal force of the high-speed rotating airflow is further enhanced. This centrifugal force promotes more thorough contact between the material and the hot air, thereby further improving the material drying efficiency. The spiral fluidized bed reducing component and the secondary centrifugal force enhancement device improve the airflow processing and separation effects, enabling the completion of a larger drying volume in a smaller space, significantly reducing the equipment's size, and substantially lowering manufacturing costs and energy consumption. The flash dryer in this embodiment occupies only about 1.6 square meters of floor space, and the drying chamber height is only about 0.8 meters. The drying chamber is small in size, making it easy to lay out the whole machine; the whole machine occupies little space, is highly flexible, practical, competitive in the market, and has a wide range of applications, especially suitable for places with limited space such as laboratories and small factories.

[0051] Example 2

[0052] Based on Embodiment 1, this embodiment continues to describe in detail the technical features involved therein and the functions and roles of these technical features in the present invention, so as to help those skilled in the art to fully understand the technical solution of the present invention and reproduce it.

[0053] A flash dryer includes a control system for controlling the operation of the dryer, a drying chamber 4 for drying wet materials, a feeding system 1 for conveying wet materials to the drying chamber 4, a stirring and crushing system for stirring and crushing the wet materials inside the drying chamber 4, a fan system for providing drying airflow to the dryer, and a dust removal system for capturing and separating materials. Hot air from the fan system enters the drying chamber 4 via a primary centrifugal force enhancement device 7. A spiral fluidizing tension reduction assembly 8 is installed at the upper end of the drying chamber 4 and is sealed to it. In this embodiment, the spiral fluidizing tension reduction assembly 8 includes a frustum-shaped windshield 81, a large-diameter flanged connector 82 sealed and fixed to the lower end of the frustum-shaped windshield 81, and a small-diameter flanged connector 83 sealed and fixed to the upper end of the frustum-shaped windshield 81. The small-diameter flanged connector 83 is sealed to the dust removal system via a secondary centrifugal force enhancement device 5. The feeding system 1 is a shafted screw feeder; the mixing and crushing system includes a mixing motor and a dispersing mixing paddle 22 driven by the mixing motor; the blower system also includes a blower 31, which is connected in a sealed manner to a primary centrifugal force enhancement device 7 via a heater 33, and the primary centrifugal force enhancement device 7 is connected in a sealed manner to the bottom of the drying chamber 4. The drying chamber 4 is a visible drying chamber.

[0054] like Figure 5 , Figure 6 As shown, in this embodiment, both the flanged end face of the large-diameter flanged connector 82 and the flanged end face of the small-diameter flanged connector 83 are provided with grooves for installing sealing rings. The large-diameter flanged connector 82 is sealed and fixed to the upper end of the drying chamber 4 using a clamp, and the small-diameter flanged connector 83 is sealed and fixed to the secondary centrifugal force strengthening device 5 using a clamp. The taper α of the frustum windshield 81 is preferably 32°-45°; within this angle range, the drying effect of this embodiment is better. Furthermore, the taper α of the frustum windshield 81 is 35°.

[0055] like Figure 3 As shown, the primary centrifugal force enhancing device 7 in this embodiment is a volute device, including a primary volute housing 71 with an air inlet, an air outlet, and a mounting port. A guide cone 72 is fixedly installed at the rotation center of the primary volute housing 71. The primary volute housing 71 further includes a primary volute body 711, which is fixedly connected to the bearing mounting box 23 of the mixing and crushing system via a volute mounting base 712 with a sealed connection thereto. The bottom of the guide cone 72 is fixed to the inner wall of the volute mounting base 712. Hot air enters the primary volute body 711 and generates centrifugal force under the guidance of the guide cone 72.

[0056] like Figure 4 As shown, the secondary centrifugal force enhancing device 5 in this embodiment is also a volute device. The secondary centrifugal force enhancing device 5 and the primary centrifugal force enhancing device 7 operate on the same principle, both employing a worm gear housing with internal guides. Specifically, the secondary centrifugal force enhancing device 5 includes a secondary volute housing 51 with an air inlet and an air outlet. A centrifugal guide assembly is fixedly positioned at the rotation center of the secondary volute housing 51. The centrifugal guide assembly further includes a hollow column 513 integrally fixed to the secondary volute housing 51 and a hollow guide cone 514 fixed to the free end of the hollow column 513. After the airflow passing through the spiral fluidization pitch reduction assembly 8 enters the secondary volute housing 51, the centrifugal force is further enhanced under the action of the centrifugal guide assembly, further improving the drying performance of the dryer.

[0057] The dust removal system in this embodiment includes a cyclone separator 61 with its air inlet sealed to a secondary centrifugal force enhancement device 5. The air outlet of the cyclone separator 61 is sealed to the air inlet of a bag filter 62, and the clean air outlet of the bag filter 62 is sealed to the induced draft fan 32 of the fan system. Both the cyclone separator 61 and the bag filter 62 are equipped with dry material collectors 611. After the spiral airflow carrying material enters the cyclone separator 61, some of the relatively larger material is collected by the cyclone separator 61, while the airflow carrying smaller particles enters the bag filter 62 for secondary filtration. After the bag filter 62 collects the smaller particles, the clean air is discharged with the induced draft fan 32.

[0058] Example 3

[0059] This embodiment is based on embodiment 1 or embodiment 2.

[0060] Because the spiral fluidized bed pitch reduction assembly 8 is a completely new structure, there is currently no quick installation method or corresponding dedicated equipment. The main difficulties in producing the spiral fluidized bed pitch reduction assembly 8 are: 1. Difficulty in coaxial alignment; ensuring the coaxial alignment of the large-diameter flanged connector 82, the frustum windshield 81, and the small-diameter flanged connector 83 is a delicate task. Misalignment is easy during alignment, resulting in large product errors, high labor intensity for welding personnel, and significant workload. 2. High requirements for weld airtightness; to ensure airtightness, the small-diameter weld 84 and the large-diameter weld 85 require bidirectional welding, both internally and externally, and are circumferential welding, making welding relatively difficult. 3. Due to the influence of welding thermal stress, the parts are prone to deformation during the welding process. 4. Difficulty for single-person operation, requiring assistance, resulting in low efficiency and high production costs.

[0061] To solve the above problems, such as Figure 7 , Figure 8 As shown, this embodiment provides a rapid manufacturing method for a spiral fluidized bed assembly of a flash dryer, specifically including the following steps: Step 1: Prepare large-diameter flanged connector 82 and small-diameter flanged connector 83 in advance for later use; both large-diameter flanged connector 82 and small-diameter flanged connector 83 are commercially available finished parts. The large-diameter flanged connector 82 can be placed into the feeding ring 95 in Step 1 for later use, but it is not limited to Step 1; it can be placed at any time before the large-diameter flanged connector 82 needs to be assembled.

[0062] Step 2: Prepare the frustum windshield 81; cut out the fan ring and make it round, then align the two radial edges and weld them together to obtain the frustum windshield 81. Cut out the fan ring according to the designed parameters such as taper and size of the frustum windshield 81, make it round, align and weld it. This welding requires double-sided welding, that is, welding is required on both the inner and outer sides of the frustum weld to ensure the airtightness of the weld.

[0063] Step 3: Use the dedicated positioning device 9 to horizontally fix the small-diameter flanged connector 83, with the flanged end of the small-diameter flanged connector 83 facing downwards. Specifically, use the small-diameter locking buckle 92 to fix the position of the small-diameter flanged connector 83.

[0064] Step 4: Coaxially assemble the frustum windshield 81 above the small-diameter flanged connector 83, and fix the position of the frustum windshield 81 using the special positioning device 9. At this time, the frustum windshield 81 and the small-diameter flanged connector 83 are coaxially assembled, and the frustum windshield 81 is supported by the support component 93. Then, slide the frustum pressing component 96 downward, and use the frustum pressing component 96 to press the frustum windshield 81 from the inside. The support component 93 and the frustum pressing component 96 work together to fix the position of the frustum windshield 81.

[0065] Step 5: Coaxially assemble the large-diameter flanged connector 82 above the frustum windshield 81, and use the special positioning device 9 to fix the position of the large-diameter flanged connector 82. Slide the feeding ring 95, which has already placed the large-diameter flanged connector 82, downwards until the large-diameter flanged connector 82 is assembled with the frustum windshield 81, and use the feeding ring 95 to fix the position of the large-diameter flanged connector 82 and keep it stationary.

[0066] Step Six: Spot weld the small-diameter weld 84 and the large-diameter weld 85. After steps one through five, the frustum windshield 81, the large-diameter flanged connector 82, and the small-diameter flanged connector 83 are now coaxially positioned. The weld between the small-diameter flanged connector 83 and the frustum windshield 81 is the small-diameter weld 84; the weld between the large-diameter flanged connector 82 and the frustum windshield 81 is the large-diameter weld 85. Spot welding the small-diameter weld 84 and the large-diameter weld 85 serves to pre-fix the components of the frustum windshield 81, the large-diameter flanged connector 82, and the small-diameter flanged connector 83.

[0067] Step 7: Fully weld the small-diameter weld 84 on the outer side, and fully weld the large-diameter weld 85 on the outer side. Since the small-diameter locking buckle 92 is connected to the hollow support seat 911 bearing, and the large-diameter locking buckle 94 is connected to the feed ring 95 bearing, the obstruction of the avoidable support assembly is eliminated, allowing the component to be welded to rotate freely. Keeping the welding torch stationary, rotate the component to be welded and fully weld the outer sides of the small-diameter weld 84 and the large-diameter weld 85 respectively. This effectively avoids the circumferential movement of the welding torch, and the rotation function of the component to be welded significantly reduces the difficulty of circumferential welding for workers.

[0068] Step 8: Fully weld the small-diameter weld 84 on the inner side, and fully weld the large-diameter weld 85 on the inner side. The spiral fluidized bed assembly 8 requires high airtightness; therefore, the small-diameter weld 84 and the large-diameter weld 85 need to be welded on both the inner and outer sides to ensure the quality of the spiral fluidized bed assembly 8. After step 7, the assembly to be welded is a single welded unit. Slide the truncated cone clamping assembly 96 upwards to remove any obstruction to the rotation of the assembly to be welded. Keep the welding torch stationary and rotate the assembly to be welded, performing full welding on the inner sides of the small-diameter weld 84 and the large-diameter weld 85 respectively. In this way, the spiral fluidized bed assembly 8 is quickly welded. During the welding process, the dedicated positioning device 9 also simultaneously prevents welding thermal deformation.

[0069] Step Nine: After the spiral fluidized bed pitch reduction assembly 8 is welded, remove the spiral fluidized bed pitch reduction assembly 8. Of course, after welding, the spiral fluidized bed pitch reduction assembly 8 will also undergo subsequent processes such as weld grinding and polishing.

[0070] Furthermore, such as Figures 9-18As shown, the dedicated positioning device 9 in this embodiment also includes a worktable 912 with a fixed hollow support base 911, and support frames 914 located on both sides of the hollow support base 911 and integrally connected to the worktable 912. A small-diameter locking buckle 92 for locking a small-diameter flanged connector 83 is coaxially disposed within the hollow support base 911, and the small-diameter locking buckle 92 is connected to the hollow support base 911 by a bearing. The two support frames 914 are provided with a feeding ring 95 that can slide up and down along the support frame 914. A large-diameter locking buckle 94 for locking a large-diameter flanged connector 82 is coaxially disposed within the feeding ring 95, and the large-diameter locking buckle 94 is connected to the feeding ring 95 by a bearing. Above the feeding ring 95, the two support frames 914 are also provided with a frustum-shaped clamping assembly 96 that can slide up and down along the support frame 914. The frustum-shaped clamping assembly 96 clamps the frustum-shaped windshield 81 from inside the component to be welded. A support component 93, which cooperates with the frustum clamping assembly 96, is fixedly mounted on the hollow support base 911. The support component 93 supports the frustum windshield 81 and is an avoidable support component. "Avoidable" means that the support component 93 provides support when needed and can be eliminated when not needed. The frustum clamping assembly 96 and the support component 93 cooperate to position the frustum windshield 81, that is, they work together on the inner and outer sides of the frustum windshield 81 to fix its position.

[0071] The specific operation process of the dedicated positioning device 9 in this embodiment is as follows: The small-diameter flanged connector 83 is placed with its flanged end facing downwards, and is laterally fixed by the small-diameter lock 92. Then, the frustum windshield 81 and the small-diameter flanged connector 83 are coaxially assembled, during which the frustum windshield 81 is supported by the support assembly 93. Then, the frustum pressing assembly 96 is pressed down, and the frustum pressing assembly 96, together with the support assembly 93, presses the frustum windshield 81 tightly from inside the frustum windshield 81. Subsequently, the feeding ring 95, with the large-diameter flanged connector 82 already installed, slides down. The large-diameter flanged connector 82 and the feeding ring 95 are coaxially positioned. Under the action of the large-diameter locking buckle 94, the fixed relationship between the large-diameter flanged connector 82 and the feeding ring 95 is unique. The feeding ring 95 slides down until the large-diameter flanged connector 82 is assembled with the frustum windshield 81. At this time, the large-diameter flanged connector 82 and the frustum windshield 81 maintain a coaxial position. The position of the feeding ring 95 is locked, thereby indirectly fixing the position of the large-diameter flanged connector 82. Spot weld the small-diameter weld 84 and the large-diameter weld 85. At this time, the components to be welded have been pre-fixed into one piece. Avoid the support component 93 to eliminate the support function of the support component 93; remove the frustum pressing component 96 to eliminate the pressing obstruction of the frustum pressing component 96. Keeping the welding torch stationary, rotate the component to be welded and perform full welding on the small-diameter weld 84 and the large-diameter weld 85 sequentially from the outside. Next, keeping the welding torch stationary, rotate the component to be welded and perform full welding on the small-diameter weld 84 and the large-diameter weld 85 sequentially from the inside. After full welding in both the inside and outside, the spiral fluidized pitch reduction assembly 8 is assembled. Release the locking mechanism on the feed ring 95, allowing it to slide down. Finally, remove the spiral fluidized pitch reduction assembly 8. If it is necessary for the feed ring 95 to slide to the bottom, before releasing the locking mechanism on the feed ring 95, position the support assembly 93 in a supporting state, then slide the feed ring 95 to the bottom and remove the spiral fluidized pitch reduction assembly 8.

[0072] In addition to the advantages of Embodiments 1 and 2, this embodiment also has the following advantages: 1. The dedicated positioning device enables rapid and precise assembly, positioning, and bidirectional welding of the helical fluidized bed pitch reduction assembly, effectively suppressing welding deformation caused by thermal stress. Its ingenious and reasonable structural design significantly improves the production efficiency of the helical fluidized bed pitch reduction assembly, drastically reduces worker workload, minimizes operation time and errors, and ensures high precision and quality in the welding process, thereby effectively guaranteeing the manufacturing quality of the helical fluidized bed pitch reduction assembly. 2. This embodiment's dedicated positioning device enables a "stationary welding torch, moving workpiece" welding method, significantly alleviating the difficulty of circumferential welding, reducing the professional skill requirements for welders, and effectively lowering production costs. 3. This embodiment's dedicated positioning device allows a single person to complete the welding of the helical fluidized bed pitch reduction assembly, effectively freeing up human resources and further reducing enterprise production costs. 4. This embodiment's dedicated positioning device is easy to implement, low in cost, and convenient and quick to operate, possessing good practical value and application prospects in the field of helical fluidized bed pitch reduction assembly manufacturing.

[0073] Example 4

[0074] Based on Example 3, this example continues to describe in detail the technical features involved and the functions and roles of these technical features in the present invention, so as to help those skilled in the art to fully understand the technical solution of the present invention and reproduce it.

[0075] like Figure 11 , Figure 13 , Figure 14 As shown, the small-diameter latch 92 in this embodiment includes a small-diameter latch body 921 and a small-diameter elastic retaining ring 923 with a latch 924. The small-diameter elastic retaining ring 923 is connected to the small-diameter latch body 921 via a transition connecting section 922, which gives the small-diameter elastic retaining ring 923 a certain tension. The free end of the small-diameter elastic retaining ring 923 is stepped, and the small-diameter stepped groove 9231 of the small-diameter elastic retaining ring 923 contacts the flanged end of the small-diameter flanged connector 83. The small-diameter latch 92 is used to fix the small-diameter flanged connector 83. Specifically, the flanged end of the small-diameter flanged connector 83 is placed downwards in the small-diameter elastic retaining ring 923, and the flanged end of the small-diameter flanged connector 83 is accommodated in the small-diameter stepped groove 9231. By locking the latch 924, the small-diameter elastic retaining ring 923 tightens and fixes the small-diameter flanged connector 83. The small locking body 921 is connected to the inner ring bearing of the hollow support base 911 via a small-diameter bearing 971. In this way, the small-diameter locking buckle 92 can rotate relative to the hollow support base 911, thus laying the foundation for quick and easy welding of the workpiece.

[0076] like Figure 12As shown, the large-diameter latch 94 in this embodiment includes a large-diameter latch body 941 and a large-diameter elastic retaining ring 943 with a second clasp 944. The large-diameter elastic retaining ring 943 is connected to the large-diameter latch body 941 via a transition connecting section 942, which gives the large-diameter elastic retaining ring 943 a certain tension. The free end of the large-diameter elastic retaining ring 943 is hook-shaped, and the hook portion 9431 of the large-diameter elastic retaining ring 943 is used to hook the flanged end of the large-diameter flanged connector 82, that is, to limit the large-diameter flanged connector 82. The large-diameter latch 94 is used to fix the large-diameter flanged connector 82. The initial position of the feeding ring 95 is above the support frame 914. When placing the large-diameter flanged connector 82, the flanged end of the large-diameter flanged connector 82 is inserted into the large-diameter elastic retaining ring 943 with its flanged end facing upwards. The flanged end of the large-diameter flanged connector 82 is restricted by the hook 9431. Then, the locking buckle 944 is tightened, and the large-diameter elastic retaining ring 943 is tightened, thereby fixing the large-diameter flanged connector 82. The large locking buckle body 941 is connected to the inner ring bearing of the feeding ring 95 via the large-diameter bearing 972; in this way, the large-diameter locking buckle 94 can rotate relative to the feeding ring 95, further laying the foundation for the rapid and simple welding of the workpiece.

[0077] like Figure 12 As shown, the feeding ring 95 in this embodiment includes a feeding ring body 951 and lower sliders 952 fixed at both ends of the feeding ring body 951 and sleeved on the support frame 914. A lower locking element 953 is installed on either or both lower sliders 952. Since the spiral fluidized tension reduction assembly 8 is lightweight, only one lower locking element 953 is generally needed for quick operation. Furthermore, the lower locking element 953 can be locked using a star-shaped handle bolt and nut, which is easy to implement, low in cost, and convenient and quick to operate.

[0078] like Figure 7 As shown, the supporting component 93 in this embodiment includes a fixing ring 931 fixed on a hollow support base 911. Multiple claw supports 932 are evenly distributed around the fixing ring 931 in the circumferential direction. Each claw support 932 is connected to a claw 934 via a ball screw 933, which can rotate relative to the claw support 932. Multiple claws 934 collectively support a frustum-shaped windshield 81 coaxially with a small-diameter flanged connector 83. The frustum-shaped clamping component 96 includes a horizontal bar 962 slidably connected to a support frame 914 at both ends via upper sliders 961. A vertical bar 963 is fixedly installed on the horizontal bar 962. Multiple outwardly inclined forks 964 are evenly distributed on the free end of the vertical bar 963. An upper locking member 965 is installed on either of the two upper sliders 961 or one of the two upper sliders 961. The combined action of the supporting component 93 and the frustum-shaped clamping component 96 fixes the position of the frustum-shaped windshield 81. When welding the inner small-diameter weld 84 and the large-diameter weld 85, simply move the truncated cone clamping assembly 96 upwards to eliminate the obstruction.

[0079] In this embodiment, the number of claws 934 and forks 964 is the same, preferably three, and the claws 934 and forks 964 are positioned opposite each other to facilitate force balance on the frustum-shaped windshield 81 and prevent excessive clamping force from causing local deformation of the workpiece. The claws 934 can quickly avoid interference when necessary, such as when performing full welding on small-diameter welds 84 and large-diameter welds 85, where the rotation of the components to be welded needs to eliminate interference from the claws 934. In this embodiment, the claws 934 are connected to the claw support 932 via ball screws 933, and simply flipping the claws 934 outwards eliminates interference; when support is needed, flipping the claws 934 in the opposite direction automatically locks their position with the ball screws 933. This embodiment offers fast switching between support and avoidance states, convenient and quick operation, and low implementation cost.

[0080] In summary, these are merely preferred embodiments of the present invention and are not intended to limit the scope of the invention. All equivalent variations and modifications made in accordance with the shape, structure, features, and spirit of the claims of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A rapid manufacturing method for a flash dryer spiral fluidized bed assembly, characterized in that, The following steps are included: The spiral fluidized tension reduction assembly (8) includes a frustum windshield (81), a large-diameter flanged connector (82) which is sealed and fixed to the lower end of the frustum windshield (81), and a small-diameter flanged connector (83) which is sealed and fixed to the upper end of the frustum windshield (81). Step 1: Prepare large-diameter flanged connector (82) and small-diameter flanged connector (83) in advance for later use; Step 2: Prepare the frustum windshield (81); cut out the fan ring and make it round, then align the two radial edges and weld them together to obtain the frustum windshield (81). Step 3: Use a special positioning device (9) to fix the small-diameter flanged connector (83) horizontally, with the flanged end of the small-diameter flanged connector (83) facing downwards; Step 4: Assemble the frustum windshield (81) coaxially above the small-diameter flange connector (83), and fix the position of the frustum windshield (81) using a special positioning device (9); Step 5: Assemble the large-diameter flanged connector (82) coaxially above the truncated cone windshield (81), and use the special positioning device (9) to fix the position of the large-diameter flanged connector (82); Step 6: Spot weld small diameter welds (84), spot weld large diameter welds (85); Step 7: Weld small-diameter welds on the outer side (84), and weld large-diameter welds on the outer side (85). Step 8: Weld small-diameter welds (84) on the inside and large-diameter welds (85) on the inside. Step 9: Remove the spiral fluidized bed (8), the spiral fluidized bed (8) welding is complete; The special positioning device (9) includes a workbench (912) with a hollow support base (911) fixedly mounted, and a support frame (914) located on both sides of the hollow support base (911) and fixedly connected to the workbench (912). The hollow support base (911) is coaxially provided with a small-diameter lock (92) for locking the small-diameter flange connector (83), and the small-diameter lock (92) is connected to the hollow support base (911) bearing; the two support frames (914) are provided with a feeding ring (95) that can slide up and down along the support frame (914), and the feeding ring (95) is coaxially provided with a large-diameter lock (94) for locking the large-diameter flange connector (82), and the large-diameter lock (94) is coaxially provided with a large-diameter lock (95) for locking the large-diameter flange connector (82), and the large-diameter lock (95) is coaxially provided with a large-diameter lock (94) for locking the large-diameter flange connector (82). 4) Connected to the bearing of the feeding ring (95); Above the feeding ring (95), the two support frames (914) are also provided with a frustum pressing assembly (96) that can slide up and down along the support frame (914), and a support assembly (93) that cooperates with the frustum pressing assembly (96) is fixedly provided on the hollow support base (911). The support assembly (93) is used to support the frustum windshield (81), and the support assembly (93) is an avoidable support assembly.

2. The rapid manufacturing method of a flash dryer spiral fluidized bed assembly according to claim 1, characterized in that: The small-diameter buckle (92) includes a small-diameter buckle body (921) and a small-diameter elastic retaining ring (923) with a buckle 1 (924). The small-diameter elastic retaining ring (923) is connected to the small-diameter buckle body (921) via a transition connecting section 1 (922). The free end of the small-diameter elastic retaining ring (923) is stepped, and the small-diameter stepped groove (9231) of the small-diameter elastic retaining ring (923) contacts the flanged end of the small-diameter flanged connector (83). The large-diameter buckle (94) includes a large-diameter buckle body (941) and a large-diameter elastic retaining ring (943) with a second buckle (944). The large-diameter elastic retaining ring (943) is connected to the large-diameter buckle body (941) via a transition connecting section two (942). The free end of the large-diameter elastic retaining ring (943) is hook-shaped, and the hook part (9431) of the large-diameter elastic retaining ring (943) is used to hook the flange end of the large-diameter flange connector (82).

3. A rapid manufacturing method for a flash dryer spiral fluidized bed assembly according to claim 2, characterized in that: The small latch body (921) is connected to the inner ring bearing of the hollow support base (911) via a small diameter bearing (971); the large latch body (941) is connected to the inner ring bearing of the feeding ring (95) via a large diameter bearing (972).

4. A rapid manufacturing method for a flash dryer spiral fluidized bed assembly according to claim 1, characterized in that: The delivery ring (95) includes a delivery ring body (951) and a lower slider (952) fixed at both ends of the delivery ring body (951) and sleeved on the support frame (914). The two lower sliders (952) or one of the two lower sliders (952) is equipped with a lower locking member (953).

5. A rapid manufacturing method for a flash dryer spiral fluidized bed assembly according to claim 1, characterized in that: The supporting component (93) includes a fixing ring (931) fixed on a hollow support base (911). The fixing ring (931) has multiple claw supports (932) evenly distributed in the circumferential direction. The claw supports (932) are connected to claws (934) that can rotate relative to the claw supports (932) by glass ball screws (933). The multiple claws (934) together support the frustum windshield (81) which is coaxially arranged with the small-diameter flange connector (83). The frustum clamping assembly (96) includes a crossbar (962) with both ends slidably connected to the support frame (914) via upper sliders (961). A vertical bar (963) is fixedly installed on the crossbar (962). Multiple outwardly inclined forks (964) are evenly distributed on the free end of the vertical bar (963). An upper locking member (965) is installed on one of the two upper sliders (961) or one of the two upper sliders (961).

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