Flash drying machine and rapid manufacturing method of spiral fluidization distance reducing assembly of flash drying machine

Abstract

The invention discloses a flash drying machine and a rapid manufacturing method of a spiral fluidization distance reducing assembly of the flash drying machine, and belongs to the technical field of pneumatic drying equipment. The flash drying machine mainly comprises a drying chamber, a feeding system, a stirring and crushing system, a fan system, a dust removal system, a first-stage centrifugal force strengthening device, a spiral fluidization distance reducing assembly and a second-stage centrifugal force strengthening device. The spiral fluidization distance reducing assembly further comprises a circular truncated cone wind shield, a large-caliber flanging connecting piece and a small-caliber flanging connecting piece. The rapid manufacturing method of the spiral fluidization distance reducing assembly mainly comprises the operation steps of preparing the circular truncated cone wind shield, and positioning the small-caliber flanging connecting piece, the circular truncated cone wind shield and the large-caliber flanging connecting piece through a special positioning device. The flash dryer is small in size, small in occupied area and high in market competitiveness; the special positioning device realizes the functions of rapid and accurate splicing, rapid positioning, rapid internal and external bidirectional welding, thermal deformation inhibition and the like of the spiral fluidization distance reducing assembly, and is high in practical value and good in application prospect.

Description

Technical Field

[0001] The present invention belongs to the technical field of airflow drying equipment, and more specifically, relates to a flash dryer with short spiral airflow pitch, good drying effect, small overall dryer volume, significantly reduced manufacturing cost, and particularly suitable for laboratories and other places with limited space, as well as a rapid manufacturing method for its spiral fluidized pitch reduction component. Background Art

[0002] Flash dryer is a high-efficiency drying equipment that integrates drying technology and fluidization technology. It is widely used in the rapid drying of powdered, granular and fibrous materials in the chemical, pharmaceutical, food and other industries. Its working principle is based on the "flash evaporation" phenomenon, that is, using high-temperature airflow to quickly evaporate the moisture on the surface of the wet material, thereby achieving the purpose of rapid drying.

[0003] The Chinese patent with the authorization announcement number CN206496606U, the authorization announcement date September 15, 2017, and the invention name of a flash dryer discloses the structure and working principle of a traditional flash dryer, which mainly includes: an air supply device, a material dispersing mechanism, a material separation device and a dust removal device. The air supply device includes an air supply fan, a heater and an air distributor which are arranged in sequence. The air supply fan is used to extract external air, the heater is used to heat the extracted air, and the air distributor is used to adjust the size of the output hot air; the air distributor in the air supply device is connected to the bottom side of the dryer shell, and the material dispersing mechanism is connected to the bottom side of the dryer shell. The structure is arranged at the bottom of the dryer shell, and a spiral feeder is also arranged in the middle position of the dryer shell. The spiral feeder is used to feed the material into the dryer shell, and the material scattering structure is used to scatter the material; the material separation device comprises a classifier and a cyclone separator, wherein the classifier is connected to the top of the dryer shell, 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 comprises a bag dust collector, an induced draft fan and an induced draft duct, the bag dust collector is connected to the top of the cyclone separator through a pipeline, the induced draft fan is connected to the bag dust collector through a pipeline, and the induced draft duct is connected to the induced draft fan.

[0004] In order to keep the material in a fluidized state for a longer period of time (to improve the drying efficiency of the material), the drying chamber of the traditional flash dryer is often designed to be tall and large, which results in a large footprint for the entire equipment. The height of the drying chamber of the traditional flash dryer alone is about 2 meters, and the entire equipment occupies an area of ​​about 8-9 square meters. It is large in size and often requires a lot of space. This drawback is particularly evident in places with limited space such as laboratories. In order to solve this problem, many laboratories have to specifically find or transform large spaces to place traditional dryers, which not only increases site costs, but also affects the overall layout of the laboratory. Summary of the invention

[0005] The purpose of the present invention is to provide a flash dryer with short spiral airflow pitch, good drying effect, small size and significantly reduced manufacturing cost, which is particularly suitable for laboratories and other places with limited space, and also relates to a rapid manufacturing method for its spiral fluidized pitch reduction component.

[0006] The present invention is achieved through the following technical solutions: A flash dryer comprises 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 in the drying chamber, a fan system for providing a dry airflow for the dryer, and a dust removal system for capturing and separating materials, wherein the hot air of the fan system enters the drying chamber through a primary centrifugal force strengthening device, and a spiral fluidization reduction assembly which is closely connected to the drying chamber is installed at the upper end of the drying chamber; The spiral fluidization reduction assembly includes a truncated cone wind shield, a large-diameter flanged connector sealed and fixedly connected to the lower end of the truncated cone wind shield, and a small-diameter flanged connector sealed and fixedly connected to the upper end of the truncated cone wind shield; the small-diameter flanged connector is sealed and connected to the dust removal system via a secondary centrifugal force enhancement device.

[0007] Preferably, the taper α of the frustoconical windshield is 32°-45°.

[0008] Preferably, the flange end faces of the large-diameter flanged connector and the flange end faces of the small-diameter flanged connector are both provided with grooves for installing sealing rings; the large-diameter flanged connector is tightly fixedly connected to the upper end of the drying chamber by a clamp, and the small-diameter flanged connector is tightly fixedly connected to the secondary centrifugal force strengthening device by a clamp.

[0009] Preferably, the first-stage centrifugal force strengthening device is a volute device, comprising a first-stage volute casing provided with an air inlet, an air outlet, and a mounting port, and a guide cone is fixedly provided at the rotation center position of the first-stage volute casing; The secondary centrifugal force enhancing device is also a volute device, including a secondary volute casing with an air inlet and an air outlet, and a centrifugal guide assembly is fixedly provided at the rotation center position of the secondary volute casing; the centrifugal guide assembly includes a hollow cylinder fixed integrally with the secondary volute casing and a hollow guide cone fixed at the free end of the hollow cylinder.

[0010] A method for rapidly manufacturing a spiral fluidized shortening assembly of a flash dryer comprises the following steps: Step 1: Prepare large-diameter flanged connectors and small-diameter flanged connectors in advance for use; Step 2: Prepare a truncated cone windshield; cut out the fan ring and make a circle, align the two radial edges after the circle and perform closed welding to obtain the truncated cone windshield; Step 3: Use a special positioning device to fix the small-diameter flanged connector horizontally, and place the flanged end of the small-diameter flanged connector downward; Step 4: Coaxially assemble the truncated cone wind shield above the small-caliber flanged connector, and fix the position of the truncated cone wind shield with a special positioning device; Step 5: Coaxially assemble the large-diameter flanged connector above the frustum windshield, and fix the position of the large-diameter flanged connector using a special positioning device; Step 6: Spot weld small diameter welds and spot weld large diameter welds; Step 7: Fully weld the small-diameter weld on the outside and the large-diameter weld on the outside; Step 8: Fully weld the small-diameter weld on the inside and the large-diameter weld on the inside; Step nine: Take out the spiral fluidization reduction assembly, and the welding of the spiral fluidization reduction assembly is completed.

[0011] Preferably, the dedicated positioning device comprises a workbench on which a hollow support seat is fixedly provided, and a support frame located on both sides of the hollow support seat and fixedly connected to the workbench; A small-diameter lock buckle for locking the small-diameter flange connector is coaxially provided inside the hollow support seat, and the small-diameter lock buckle is connected to the bearing of the hollow support seat; a feeding ring that can slide up and down along the support frame is provided on the two support frames, and a large-diameter lock buckle for locking the large-diameter flange connector is coaxially provided inside the feeding ring, and the large-diameter lock buckle is connected to the bearing of the feeding ring; above the feeding ring, a truncated cone clamping assembly that can slide up and down along the support frame is also provided on the two support frames, and a supporting assembly that cooperates with the truncated cone clamping assembly is fixedly provided on the hollow support seat, the supporting assembly is used to support the truncated cone windshield, and the supporting assembly is an avoidable supporting assembly.

[0012] Preferably, the small-caliber lock buckle comprises a small-caliber lock buckle body and a small-caliber elastic snap ring provided with a buckle 1, and the small-caliber elastic snap ring is connected to the small-caliber lock buckle body via a transition connection section 1; the free end of the small-caliber elastic snap ring is step-shaped, and the small-caliber step groove of the small-caliber elastic snap ring contacts the flange end of the small-caliber flange connector; The large-diameter lock buckle includes a large-diameter lock buckle body and a large-diameter elastic snap ring with a second buckle, and the large-diameter elastic snap ring is connected to the large-diameter lock buckle body through a second transition connection section; the free end of the large-diameter elastic snap ring is hook-shaped, and the hook portion of the large-diameter elastic snap ring is used to hook the flange end of the large-diameter flange connector.

[0013] Preferably, the small lock buckle body is connected to the inner ring bearing of the hollow support seat via a small-diameter bearing; the large lock buckle body is connected to the inner ring bearing of the sending ring via a large-diameter bearing.

[0014] Preferably, the piece-feeding ring comprises a piece-feeding ring body, and lower sliders fixed at both ends of the piece-feeding ring body and sleeved on the support frame, and the two lower sliders or one of the two lower sliders is installed with a lower locking piece.

[0015] Preferably, the support assembly comprises a fixing ring fixed on the hollow support seat, a plurality of claw pillars are evenly distributed in the circumferential direction of the fixing ring, the claw pillars are connected with claws capable of flipping relative to the claw pillars via glass bead screws, and the plurality of claws jointly support a truncated cone windshield coaxially arranged with the small-caliber flange connector; The truncated table clamping assembly includes a cross bar with two ends slidably connected to the support frame via upper sliders, a vertical bar is fixedly installed on the cross bar, and a plurality of fork claws inclined outward are evenly distributed on the free end of the vertical bar; an upper locking piece is installed on the two upper sliders or one of the two upper sliders.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The design of the spiral fluidization and pitch reduction component of the present invention has a pitch squeezing and accelerating effect on the airflow in the drying chamber. During the spiral rising process of the airflow, the pitch is suddenly shortened by the spiral fluidization and pitch reduction component, and the residence time of the material in the drying chamber is prolonged, thereby achieving a significant reduction in the volume of the drying chamber while ensuring the efficient drying performance of the dryer.

[0017] 2. The high-speed and stable drying airflow flowing out from the spiral fluidization reduction 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 will promote further and full contact between the material and the hot air, thereby further improving the material drying efficiency.

[0018] 3. The spiral fluidization reduction component and the secondary centrifugal force enhancement device improve the airflow processing and separation effects, achieve more drying in a smaller space, significantly reduce the size of the equipment, and greatly reduce the equipment manufacturing cost and energy consumption.

[0019] 4. The flash dryer of the present invention occupies an area of ​​only about 1.6 square meters, and the height of the drying chamber is only about 0.8 meters; the drying chamber is small in size and easy to layout the whole machine; the whole machine occupies a small area, has high flexibility, strong practicality, strong market competitiveness, and a wide range of applications, and is particularly suitable for places with limited space such as laboratories and small factories.

[0020] 5. The special positioning device of the present invention realizes the rapid and accurate assembly, rapid positioning, and rapid internal and external bidirectional welding of the spiral fluidized spacing assembly, and can effectively suppress the welding deformation caused by thermal stress; the structural design is reasonable and ingenious, which greatly improves the production efficiency of the spiral fluidized spacing assembly, greatly reduces the labor intensity of workers, greatly reduces the operation time and operation errors of workers, ensures the high precision and high quality of the welding process, and thus effectively guarantees the manufacturing quality of the spiral fluidized spacing assembly.

[0021] 6. The special positioning device of the present invention can realize the welding method of "the welding gun does not move, the workpiece moves", greatly alleviates the welding difficulty of circumferential welding, reduces the professional skill requirements for welding personnel, and effectively reduces production costs.

[0022] 7. The special positioning device of the present invention enables a single person to complete the welding work of the spiral fluidized reduction assembly, effectively releasing human resources and further reducing the production cost of the enterprise.

[0023] 8. The special positioning device structure of the present invention is easy to implement, has low implementation cost, is convenient and quick to operate, and has good practical value and application prospects in the field of spiral fluidized bed reduction assembly manufacturing. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the flash drying system flow of the present invention.

[0025] Figure 2 It is a schematic structural diagram of the flash dryer of the present invention.

[0026] Figure 3 The present invention Figure 2 Enlarged view of point A in the middle.

[0027] Figure 4 The present invention Figure 2 Enlarged view of point B in the middle.

[0028] Figure 5 It is a schematic diagram of the structure of the spiral fluidized shortening assembly of the present invention.

[0029] Figure 6 It is a schematic diagram of the assembly structure of the spiral fluidization shortening assembly and the secondary centrifugal force strengthening device of the present invention.

[0030] Figure 7 It is a schematic diagram of the front structural direction of the special positioning device of the present invention.

[0031] Figure 8 It is a schematic diagram of the three-dimensional directional structure of the special positioning device of the present invention.

[0032] Fig. 9 The present invention Figure 8 Enlarged view of center C.

[0033] Fig.10 It is a schematic diagram of the cross-sectional structure of the special positioning device of the present invention.

[0034] Fig.11 The present invention Fig.10 Enlarged view of point D in the middle.

[0035] Fig.12 The present invention Fig.10 Enlarged view of point E in the middle.

[0036] Fig.13 This is a schematic diagram of the three-dimensional structure of a small-caliber lock buckle of the special positioning device of the present invention. Figure 1 .

[0037] Fig.14 This is a schematic diagram of the three-dimensional structure of a small-caliber lock buckle of the special positioning device of the present invention. Figure 2 .

[0038] Fig.15 It is a schematic diagram of the state when the small-diameter flanging connector is positioned and the large-diameter flanging connector is placed.

[0039] Fig.16 It is a schematic diagram of the state when the small-diameter flanged connector is positioned, and the large-diameter flanged connector and the truncated cone wind shield are placed.

[0040] Fig.17 It is a schematic diagram of the state of the truncated table wind shield of the present invention when it is positioned.

[0041] Fig.18 It is a schematic diagram of the state when the truncated cone windshield, the large-diameter flanged connecting piece and the small-diameter flanged connecting piece of the present invention are assembled and positioned.

[0042] In the figure: 1. Feeding system; 21. Stirring motor; 22. Breaking stirring paddle; 23. Bearing mounting box; 31. Blower; 32. Induced draft fan; 33. Heater; 4. Drying chamber; 5. Secondary centrifugal force strengthening device; 51. Secondary volute casing; 513. Hollow cylinder; 514. Hollow guide cone; 61. Cyclone separator; 611. Dry material collector; 62. Bag dust collector; 7. Primary centrifugal force strengthening device; 71. Primary volute casing; 711. Primary volute body; 712. volute mounting seat; 72. Guide cone; 8. Spiral fluidization reduction assembly; 81. Cone wind shield; 82. Large-diameter flange connector; 83. Small-diameter flange connector; 84. Small-diameter weld; 85. Large-diameter weld; 9. Special positioning device; 911. Hollow support seat; 912. Workbench ; 914, support frame; 92, small-caliber lock buckle; 921, small-caliber lock buckle body; 922, transition connection section 1; 923, small-caliber elastic clamp; 9231, small-caliber step groove; 924, buckle 1; 93, supporting component; 931, fixing ring; 932, claw support; 933, glass bead screw; 934, claw; 94, large-caliber lock buckle; 941, large-caliber lock buckle body; 942, Transition connection section 2; 943, large-diameter elastic snap ring; 9431, hook; 944, buckle 2; 95, feeding ring; 951, feeding ring body; 952, lower slider; 953, lower locking piece; 96, round table clamping assembly; 961, upper slider; 962, cross bar; 963, vertical bar; 964, fork claw; 965, upper locking piece; 971, small-diameter bearing; 972, large-diameter bearing. DETAILED DESCRIPTION

[0043] In order to enable readers to better understand the design purpose of the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the directional nouns that may be involved in the following paragraphs, including but not limited to "up, down, left, right, front, back", etc., are based on the visual directions shown in the corresponding drawings of the specification, and they should not and should not be regarded as limiting the scope of protection or technical solutions of the present invention. Their purpose is only to facilitate those skilled in the art to better understand the technical solutions created by the present invention.

[0044] In the description of this specification, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances combined with the common knowledge, design specifications, standard documents, etc. in this field.

[0045] Example 1

[0046] 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 mixing and crushing system for mixing and crushing the wet materials inside the drying chamber 4, a fan system for providing a dry airflow for the dryer, and a dust removal system for capturing and separating materials. The hot air of the fan system enters the drying chamber 4 through a primary centrifugal force enhancement device 7, and a spiral fluidization and shortening assembly 8 is installed at the upper end of the drying chamber 4 and is tightly connected thereto. The spiral fluidization and shortening assembly 8 of this embodiment includes a truncated cone windshield 81, a large-diameter flanged connector 82 tightly fixedly connected to the lower end of the truncated cone windshield 81, and a small-diameter flanged connector 83 tightly fixedly connected to the upper end of the truncated cone windshield 81. The small-diameter flanged connector 83 is tightly connected to the dust removal system through a secondary centrifugal force enhancement device 5.

[0047] Specifically, the lower end of the truncated cone windshield 81 is sealed and fixedly connected to the large-diameter flanged connector 82 by welding, and the upper end of the truncated cone windshield 81 is sealed and fixedly connected to the small-diameter flanged connector 83 by welding. The weld between the truncated cone windshield 81 and the large-diameter flanged connector 82 is the large-diameter weld 85, and the weld between the truncated cone windshield 81 and the small-diameter flanged connector 83 is the small-diameter weld 84. In order to ensure the airtightness of the spiral fluidization shortening assembly 8, the small-diameter weld 84 and the large-diameter weld 85 need to be fully welded twice inside and outside, that is, after the weld is fully welded from the outside, it is necessary to fully weld the weld again from the inside.

[0048] The working principle of this embodiment is as follows: the hot air of the fan system enters the drying chamber 4 in a tangential direction and at a certain spiral speed under the action of the first-level centrifugal force strengthening device 7. Particles with low moisture content and small particle size are entrained and rise by the rotating airflow, and are dried during the rising process. In the drying chamber 4, the stirring and crushing system fully breaks up the larger and wetter materials, and the spiral airflow produces strong shearing, blowing, floating, and rotating effects on the broken materials. The materials are subjected to complex movements such as centrifugation, shearing, collision, and friction to form micro-particles. In this process, the materials are dried. Subsequently, the broken materials rise in a fluidized state, and after rising to a certain height, they enter the spiral fluidization and pitch reduction component. During the spiral rising process, the airflow is suddenly shortened by the spiral fluidization and pitch reduction component 8, and the residence time of the materials in the drying chamber is forced to be extended, thereby strengthening the rapid heat transfer of the materials. In other words, the design of the spiral fluidization and 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, so that the material can move along the edge of the drying cylinder, and promote the material to further fully contact with the hot air, thereby further improving the material drying efficiency. The dried material enters the dust removal system, which generally collects the material in stages and finally discharges the clean exhaust gas.

[0049] The design of the spiral fluidization and pitch reduction assembly of this embodiment has a pitch squeezing and accelerating effect on the airflow in the drying chamber. During the spiral rising process of the airflow, the pitch is suddenly shortened by the spiral fluidization and pitch reduction assembly, and the residence time of the material in the drying chamber is prolonged, so that the volume of the drying chamber is greatly reduced while ensuring the efficient drying performance of the dryer. The high-speed and stable dry airflow flowing out of the spiral fluidization and pitch reduction 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 further full contact between the material and the hot air, thereby further improving the drying efficiency of the material. The spiral fluidization and pitch reduction assembly and the secondary centrifugal force enhancement device improve the processing effect and separation effect of the airflow, achieve more drying in a smaller space, significantly reduce the volume of the equipment, and greatly reduce the manufacturing cost and energy consumption of the equipment. The flash dryer of this embodiment occupies an area of ​​only about 1.6 square meters, and the height of the drying chamber is only about 0.8 meters. The drying chamber is small in size and easy to layout; the whole machine occupies a small area, is highly flexible, practical, highly competitive in the market, and has a wide range of applications. It is especially suitable for places with limited space such as laboratories and small factories.

[0050] Example 2

[0051] Based on Example 1, this example continues to describe in detail the technical features involved therein and the functions and roles played by the technical features in the present invention, so as to help technicians in this field fully understand the technical solution of the present invention and reproduce it.

[0052] 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 a dry airflow for the dryer, and a dust removal system for capturing and separating materials. The hot air of the fan system enters the drying chamber 4 through a primary centrifugal force enhancement device 7, and a spiral fluidization and shortening assembly 8 is installed at the upper end of the drying chamber 4 and is tightly connected thereto. The spiral fluidization and shortening assembly 8 of this embodiment includes a truncated cone windshield 81, a large-diameter flanged connector 82 tightly fixedly connected to the lower end of the truncated cone windshield 81, and a small-diameter flanged connector 83 tightly fixedly connected to the upper end of the truncated cone windshield 81; the small-diameter flanged connector 83 is tightly connected to the dust removal system through a secondary centrifugal force enhancement device 5. The feeding system 1 is a shaft-type spiral feeder; the stirring and crushing system includes a stirring motor and a stirring paddle 22 driven by the stirring motor; the fan system also includes a blower 31, which is tightly connected to the first-stage centrifugal force strengthening device 7 through a heater 33, and the first-stage centrifugal force strengthening device 7 is tightly connected to the bottom end of the drying chamber 4. The drying chamber 4 is a visible drying chamber.

[0053] like Figure 5 , Figure 6 As shown, the flange end face of the large-diameter flanged connector 82 and the flange end face of the small-diameter flanged connector 83 of this embodiment are both provided with grooves for installing sealing rings. The large-diameter flanged connector 82 is sealed and fixedly connected to the upper end of the drying chamber 4 by a clamp, and the small-diameter flanged connector 83 is sealed and fixedly connected to the secondary centrifugal force reinforcement device 5 by a clamp. The taper α of the truncated cone wind shield 81 is preferably 32°-45°; within this angle range, the drying effect of this embodiment is better. Furthermore, the taper α of the truncated cone wind shield 81 is 35°.

[0054] like Figure 3 As shown, the first-stage centrifugal force strengthening device 7 of this embodiment is a volute device, including a first-stage volute housing 71 provided with an air inlet, an air outlet, and a mounting port. A guide cone 72 is fixedly provided at the rotation center position of the first-stage volute housing 71. Among them, the first-stage volute housing 71 also includes a first-stage volute body 711, and the first-stage volute body 711 is fixedly connected to the bearing mounting box 23 of the mixing and crushing system through a volute mounting seat 712 which is tightly connected thereto, and the bottom of the guide cone 72 is fixed on the inner wall of the volute mounting seat 712. After the hot air enters the first-stage volute body 711, centrifugal force is generated under the guidance of the guide cone 72.

[0055] like Figure 4 As shown, the secondary centrifugal force enhancing device 5 of this embodiment is also a volute device. The secondary centrifugal force enhancing device 5 and the primary centrifugal force enhancing device 7 have the same principle, and both adopt a structure of a worm gear housing and an internal guide. The secondary centrifugal force enhancing device 5 specifically includes a secondary volute housing 51 provided with an air inlet and an air outlet, and a centrifugal guide assembly is fixedly provided at the rotation center position of the secondary volute housing 51; the centrifugal guide assembly further includes a hollow cylinder 513 fixed integrally with the secondary volute housing 51 and a hollow guide cone 514 fixed at the free end of the hollow cylinder 513. After the airflow of the spiral passing through the spiral fluidization 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.

[0056] The dust removal system of this embodiment includes a cyclone separator 61 whose air inlet is sealed and connected to the secondary centrifugal force strengthening device 5, the air outlet of the cyclone separator 61 is sealed and connected to the air inlet of the bag dust collector 62, and the clean air outlet of the bag dust collector 62 is sealed and connected to the induced draft fan 32 of the fan system; the discharge ports of the cyclone separator 61 and the bag dust collector 62 are both installed with dry material collectors 611. After the spiral airflow carrying the material enters the cyclone separator 61, under the action of the cyclone separator 61, a part of the relatively large material will be collected by the cyclone separator 61, and the airflow carrying the smaller particle material enters the bag dust collector 62 for secondary filtration. After the bag dust collector 62 collects the tiny particle material, the clean air is discharged along with the induced draft fan 32.

[0057] Example 3

[0058] This embodiment is based on Embodiment 1 or Embodiment 2.

[0059] Since the spiral fluidized shortening assembly 8 is a brand-new structure, there is currently no quick installation method and corresponding special device. The production difficulties of the spiral fluidized shortening assembly 8 are mainly: 1. Coaxial alignment is difficult; ensuring the coaxial alignment of the large-diameter flanged connector 82, the truncated cone windshield 81, and the small-diameter flanged connector 83 is a delicate job, which is easy to misalign during the alignment process, resulting in large product errors, large energy loss for welders, and high work intensity. 2. High welding airtightness requirements; to ensure airtightness, the small-diameter weld 84 and the large-diameter weld 85 require bidirectional welding inside and outside, and circumferential welding, which is relatively difficult to weld. 3. Affected by welding thermal stress, each part is prone to deformation during the welding process. 4. Single-person operation is difficult and requires assistance, which is inefficient and has high production costs.

[0060] To solve the above problems, Figure 7 , Figure 8 As shown, this embodiment provides a method for quickly manufacturing a spiral fluidized shortening assembly of a flash dryer, which specifically includes the following steps: Step 1: Prepare the large-diameter flanged connector 82 and the small-diameter flanged connector 83 in advance for use; the large-diameter flanged connector 82 and the small-diameter flanged connector 83 are finished parts purchased on the market. The large-diameter flanged connector 82 can be placed in the feeding ring 95 for use in step 1, and it is certainly not limited to step 1. It can be placed at any time before the large-diameter flanged connector 82 needs to be assembled.

[0061] Step 2: Prepare the truncated cone windshield 81; cut out the fan ring and make a circle, align the two radial edges after the circle and perform airtight welding to obtain the truncated cone windshield 81. Cut out the fan ring according to the designed parameters such as the taper and size of the truncated cone windshield 81, align and weld after the circle, and this welding requires double-sided welding, that is, both the inside and outside of the truncated cone weld must be welded to ensure the airtightness of the weld.

[0062] Step 3: Use the special positioning device 9 to fix the small-diameter flanged connector 83 horizontally, and place the flanged end of the small-diameter flanged connector 83 downward. Specifically, use the small-diameter lock buckle 92 to fix the position of the small-diameter flanged connector 83.

[0063] Step 4: Coaxially assemble the truncated cone windshield 81 above the small-diameter flanged connector 83, and fix the position of the truncated cone windshield 81 using the dedicated positioning device 9. At this time, the truncated cone windshield 81 and the small-diameter flanged connector 83 are coaxially assembled, and the truncated cone windshield 81 is supported by the supporting assembly 93. Then, slide the truncated cone pressing assembly 96 downward, and use the truncated cone pressing assembly 96 to press the truncated cone windshield 81 from the inside of the truncated cone windshield 81. The supporting assembly 93 and the truncated cone pressing assembly 96 work together to fix the position of the truncated cone windshield 81.

[0064] Step 5: Coaxially assemble the large-diameter flanged connector 82 above the truncated cone windshield 81, and fix the position of the large-diameter flanged connector 82 using the dedicated positioning device 9. Slide the delivery ring 95 on which the large-diameter flanged connector 82 has been placed downward until the large-diameter flanged connector 82 is assembled with the truncated cone windshield 81, and fix the position of the large-diameter flanged connector 82 using the delivery ring 95 to keep it stationary.

[0065] Step 6: spot welding the small-diameter weld 84 and the large-diameter weld 85. After the operation of steps 1 to 5, the truncated cone windshield 81, the large-diameter flanged connector 82, and the small-diameter flanged connector 83 have been coaxially positioned. The weld between the small-diameter flanged connector 83 and the truncated cone windshield 81 is the small-diameter weld 84; the weld between the large-diameter flanged connector 82 and the truncated cone windshield 81 is the large-diameter weld 85. Spot welding the small-diameter weld 84 and the large-diameter weld 85 plays a pre-fixing role for the components of the truncated cone windshield 81, the large-diameter flanged connector 82, and the small-diameter flanged connector 83.

[0066] Step 7: Fully weld the small-diameter weld 84 on the outside, and full weld the large-diameter weld 85 on the outside. Since the small-diameter lock buckle 92 is connected to the hollow support seat 911 bearing, and the large-diameter lock buckle 94 is connected to the feeding ring 95 bearing, the obstruction of the avoidable support component is eliminated, and the assembly to be welded can rotate freely. Keep the welding gun still, rotate the assembly to be welded, and fully weld the outside of the small-diameter weld 84 and the large-diameter weld 85 respectively. In this way, the circumferential movement of the welding gun can be effectively avoided, and the self-rotation function of the assembly to be welded will greatly reduce the difficulty of circumferential welding for workers.

[0067] Step eight: Fully weld the small-diameter weld 84 on the inside, and fully weld the large-diameter weld 85 on the inside. The spiral fluidized shortening assembly 8 has high requirements for air tightness. The small-diameter weld 84 and the large-diameter weld 85 need to be welded on both the inside and outside to ensure the quality of the spiral fluidized shortening assembly 8. After step seven, the assembly to be welded is already a welded whole. Slide the truncated table clamping assembly 96 upward to eliminate the rotation obstacle of the truncated table clamping assembly 96 to the assembly to be welded. Keep the welding gun stationary, rotate the assembly to be welded, and fully weld the inside of the small-diameter weld 84 and the large-diameter weld 85 respectively. In this way, the spiral fluidized shortening assembly 8 is quickly welded. During the welding process, the special positioning device 9 also plays a role in preventing welding thermal deformation.

[0068] Step 9: After the spiral fluidized spacer assembly 8 is welded, the spiral fluidized spacer assembly 8 is taken out. Of course, after welding, the spiral fluidized spacer assembly 8 will also undergo subsequent processes such as weld grinding and polishing.

[0069] Furthermore, if Figure 9-Figure 18As shown, the special positioning device 9 of this embodiment also includes a workbench 912 fixed with a hollow support seat 911, and a support frame 914 located on both sides of the hollow support seat 911 and fixedly connected to the workbench 912. A small-diameter lock buckle 92 for locking the small-diameter flanging connector 83 is coaxially provided in the hollow support seat 911, and the small-diameter lock buckle 92 is connected to the hollow support seat 911 with a bearing. A feeding ring 95 that can slide up and down along the support frame 914 is provided on the two support frames 914, and a large-diameter lock buckle 94 for locking the large-diameter flanging connector 82 is coaxially provided in the feeding ring 95, and the large-diameter lock buckle 94 is connected to the feeding ring 95 with a bearing. Above the feeding ring 95, a round table clamping assembly 96 that can slide up and down along the support frame 914 is also provided on the two support frames 914, and the round table clamping assembly 96 presses the round table wind shield 81 from the inside of the assembly to be welded. A support assembly 93 cooperating with the truncated cone clamping assembly 96 is fixedly provided on the hollow support seat 911. The support assembly 93 is used to support the truncated cone windshield 81, and the support assembly 93 is an avoidable support assembly. The so-called "avoidable" means that the support assembly 93 plays a supporting role when it is needed, and can eliminate the supporting role when it is not needed. The truncated cone clamping assembly 96 cooperates with the support assembly 93 to position the truncated cone windshield 81, that is, the inner and outer sides of the truncated cone windshield 81 act against each other to fix the position of the truncated cone windshield 81.

[0070] The specific operation process of the special positioning device 9 of this embodiment is as follows: the small-diameter flanged connector 83 is placed with the flanged end facing downward, and the small-diameter flanged connector 83 is laterally fixed under the action of the small-diameter lock buckle 92. Thereafter, the truncated cone windshield 81 and the small-diameter flanged connector 83 are coaxially assembled, and during this process, the truncated cone windshield 81 is supported by the supporting assembly 93. Then, the truncated cone pressing assembly 96 is pressed downward, and the truncated cone pressing assembly 96 and the supporting assembly 93 work together to press the truncated cone windshield 81 from the inside of the truncated cone windshield 81. Subsequently, the feeding ring 95 with the large-diameter flanged connector 82 installed is lowered. The large-diameter flanged connector 82 and the feeding ring 95 are coaxially arranged. Under the action of the large-diameter locking buckle 94, the large-diameter flanged connector 82 and the feeding ring 95 have a unique fixed relationship. The feeding ring 95 is lowered until the large-diameter flanged connector 82 is assembled with the truncated cone windshield 81. At this time, the large-diameter flanged connector 82 and the truncated cone windshield 81 maintain a coaxial position relationship. 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. Avoid the supporting component 93 and eliminate the supporting function of the supporting component 93; remove the truncated cone clamping component 96 and eliminate the clamping obstacle of the truncated cone clamping component 96. Keep the welding gun still, rotate the assembly to be welded, and fully weld the small-diameter weld 84 and the large-diameter weld 85 from the outside. Next, keep the welding gun still, rotate the assembly to be welded, and fully weld the small-diameter weld 84 and the large-diameter weld 85 from the inside. After full welding in both directions, the spiral fluidization and shortening assembly 8 is assembled. Remove the lock on the feeding ring 95, slide the feeding ring 95 down, and finally take out the spiral fluidization and shortening assembly 8. If the feeding ring 95 needs to slide to the bottom, before removing the lock on the feeding ring 95, put the supporting assembly 93 in a supporting state, and then slide the feeding ring 95 to the bottom, and take out the spiral fluidization and shortening assembly 8.

[0071] In addition to the advantages of Embodiment 1 and Embodiment 2, this embodiment also has the following advantages: 1. The special positioning device realizes the rapid and accurate splicing, rapid positioning, and rapid internal and external bidirectional welding of the spiral fluidized spacer assembly, and can effectively suppress the welding deformation caused by thermal stress; the structural design is reasonable and ingenious, which greatly improves the production efficiency of the spiral fluidized spacer assembly, greatly reduces the labor intensity of workers, greatly reduces the operation time and operation errors of workers, ensures the high precision and high quality of the welding process, and effectively guarantees the manufacturing quality of the spiral fluidized spacer assembly. 2. The special positioning device of this embodiment can realize the welding method of "the welding gun does not move, the workpiece moves", greatly alleviates the welding difficulty of circumferential welding, reduces the professional skills requirements for welding personnel, and effectively reduces production costs. 3. The special positioning device of this embodiment enables a single person to complete the welding work of the spiral fluidized spacer assembly, effectively releases human resources, and further reduces the production cost of the enterprise. 4. The special positioning device of this embodiment is easy to implement, low in cost, convenient and quick to operate, and has good practical value and application prospects in the field of spiral fluidized spacer assembly manufacturing.

[0072] Example 4

[0073] Based on Example 3, this example continues to describe in detail the technical features involved and the functions and roles played by the technical features in the present invention, so as to help technicians in this field fully understand the technical solution of the present invention and reproduce it.

[0074] like Fig.11 , Fig.13 , Fig.14 As shown, the small-caliber lock buckle 92 of this embodiment includes a small-caliber lock buckle body 921 and a small-caliber elastic snap ring 923 provided with a buckle 1 924. The small-caliber elastic snap ring 923 is connected to the small-caliber lock buckle body 921 through a transition connection section 1 922. This structure enables the small-caliber elastic snap ring 923 to have a certain tension. The free end of the small-caliber elastic snap ring 923 is stepped, and the small-caliber step groove 9231 of the small-caliber elastic snap ring 923 contacts the flange end of the small-caliber flange connector 83. The small-caliber lock buckle 92 is used to fix the small-caliber flange connector 83. Specifically, the flange end of the small-caliber flange connector 83 is placed downward in the small-caliber elastic snap ring 923, and the flange end of the small-caliber flange connector 83 is accommodated in the small-caliber step groove 9231. The buckle 1 924 is locked, and the small-caliber elastic snap ring 923 tightens and fixes the small-caliber flange connector 83. The small lock buckle body 921 is connected to the inner ring bearing of the hollow support seat 911 via the small-caliber bearing 971. In this way, the small-caliber lock buckle 92 can rotate relative to the hollow support seat 911, thereby laying a foundation for the fast and simple welding of workpieces.

[0075] like Fig.12As shown, the large-diameter lock buckle 94 of this embodiment includes a large-diameter lock buckle body 941 and a large-diameter elastic snap ring 943 provided with a second buckle 944. The large-diameter elastic snap ring 943 is connected to the large-diameter lock buckle body 941 through a second transition connection section 942. This structure enables the large-diameter elastic snap ring 943 to have a certain tension. The free end of the large-diameter elastic snap ring 943 is hook-shaped, and the hook portion 9431 of the large-diameter elastic snap ring 943 is used to hook the flange end of the large-diameter flange connector 82, that is, to limit the large-diameter flange connector 82. The large-diameter lock buckle 94 is used to fix the large-diameter flange connector 82. The initial position of the feeding ring 95 is at the upper position of the support frame 914. When the large-diameter flanged connector 82 is placed, the flanged end of the large-diameter flanged connector 82 is placed upward into the large-diameter elastic snap ring 943, and the flanged end of the large-diameter flanged connector 82 is restricted by the hook 9431. Then, the buckle 944 is locked, and the large-diameter elastic snap ring 943 is tightened to fix the large-diameter flanged connector 82. The large lock body 941 is connected to the inner ring bearing of the feeding ring 95 through the large-diameter bearing 972; in this way, the large-diameter lock 94 can rotate relative to the feeding ring 95, further laying a foundation for the rapid and simple welding of workpieces.

[0076] like Fig.12 As shown, the feeding ring 95 of 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, and the two lower sliders 952 or one of the two lower sliders 952 is installed with a lower locking member 953. Since the spiral fluidization shortening assembly 8 is light in weight, generally only one lower locking member 953 is used, which is convenient for quick operation. And the lower locking member 953 can be locked by a plum handle bolt with a nut, which is easy to implement, low in cost, and convenient and quick to operate.

[0077] like Figure 7 As shown, the supporting assembly 93 of this embodiment includes a fixing ring 931 fixed on the hollow support seat 911, and the fixing ring 931 evenly distributes a plurality of claw pillars 932 in the circumferential direction. The claw pillars 932 are connected to claws 934 that can flip relative to the claw pillars 932 through glass bead screws 933. The plurality of claws 934 jointly support the truncated cone windshield 81 coaxially arranged with the small-caliber flange connector 83; the truncated cone clamping assembly 96 includes a cross bar 962 slidably connected to the support frame 914 through upper sliders 961 at both ends, and a vertical bar 963 is fixedly installed on the cross bar 962. The free end of the vertical bar 963 is evenly distributed with a plurality of fork claws 964 inclined outwardly; the two upper sliders 961 or one of the two upper sliders 961 is installed with an upper locking member 965. The cooperation between the supporting assembly 93 and the truncated cone clamping assembly 96 fixes the position of the truncated cone windshield 81. When welding the small-diameter weld 84 and the large-diameter weld 85 on the inner side, the truncated table clamping assembly 96 is directly moved upward to eliminate the obstruction of the truncated table clamping assembly 96 .

[0078] In this embodiment, the number of the supporting claws 934 and the fork claws 964 is the same, preferably three, and the supporting claws 934 and the fork claws 964 correspond in position, so as to balance the force on the truncated cone windshield 81 and prevent the workpiece from being deformed locally due to excessive pressing force. The supporting claws 934 can quickly evade when it is necessary to evade. For example, when the small-diameter weld 84 and the large-diameter weld 85 are fully welded, the rotation of the assembly to be welded needs to eliminate the interference of the supporting claws 934. In this embodiment, the supporting claws 934 are connected to the supporting claw pillars 932 via the glass bead screws 933. The interference of the supporting claws 934 can be eliminated by directly flipping the supporting claws 934 outward; and when support is required, the supporting claws 934 are flipped in the opposite direction, and the glass bead screws 933 can automatically lock the position of the supporting claws 934. The switching speed between the supporting state and the evading state of this embodiment is fast, the operation is convenient and quick, and the implementation cost is low.

[0079] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. All equivalent changes and modifications in the shape, structure, characteristics and spirit of the claims of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A flash dryer, comprising a control system for controlling the operation of the dryer, a drying chamber (4) for drying wet materials, a feeding system (1) for conveying the wet materials to the drying chamber (4), a stirring and crushing system for stirring and crushing the wet materials in the drying chamber (4), a fan system for providing a dry air flow to the dryer, and a dust removal system for capturing and separating materials, characterized in that: The hot air of the fan system enters the drying chamber (4) through a first-stage centrifugal force strengthening device (7), and a spiral fluidization shortening assembly (8) is installed at the upper end of the drying chamber (4) and is tightly connected thereto; The spiral fluidization shortening assembly (8) comprises a truncated cone wind shield (81), a large-diameter flanged connecting piece (82) sealed and fixedly connected to the lower end of the truncated cone wind shield (81), and a small-diameter flanged connecting piece (83) sealed and fixedly connected to the upper end of the truncated cone wind shield (81); the small-diameter flanged connecting piece (83) is sealed and connected to the dust removal system via a secondary centrifugal force strengthening device (5).

2. A flash dryer according to claim 1, characterized in that: The taper α of the frustum windshield (81) is 32°-45°.

3. A flash dryer according to claim 1, characterized in that: The flanged end surface of the large-diameter flanged connecting piece (82) and the flanged end surface of the small-diameter flanged connecting piece (83) are both provided with grooves for installing a sealing ring; the large-diameter flanged connecting piece (82) is sealed and fixedly connected to the upper end of the drying chamber (4) by means of a clamp, and the small-diameter flanged connecting piece (83) is sealed and fixedly connected to the secondary centrifugal force reinforcing device (5) by means of a clamp.

4. A flash dryer according to claim 1, characterized in that: The first-stage centrifugal force strengthening device (7) is a volute device, comprising a first-stage volute casing (71) provided with an air inlet, an air outlet, and a mounting port, wherein a guide cone (72) is fixedly provided at the rotation center position of the first-stage volute casing (71); The secondary centrifugal force reinforcement device (5) is also a volute device, comprising a secondary volute casing (51) provided with an air inlet and an air outlet, wherein a centrifugal guide assembly is fixedly provided at the rotation center position of the secondary volute casing (51); the centrifugal guide assembly comprises a hollow cylinder (513) fixedly integrated with the secondary volute casing (51) and a hollow guide cone (514) fixed at the free end of the hollow cylinder (513).

5. A method for rapidly manufacturing a spiral fluidized shortening assembly of a flash dryer, characterized in that: The following steps are included: Step 1: Prepare in advance a large-diameter flanged connector (82) and a small-diameter flanged connector (83) for use; Step 2: preparing a truncated cone windshield (81); cutting out the fan ring and making a rounding process, aligning the two radial edges after the rounding process and performing a closed welding process to obtain the truncated cone windshield (81); Step 3: Using a dedicated positioning device (9) to laterally fix the small-diameter flanged connector (83), with the flanged end of the small-diameter flanged connector (83) facing downward; Step 4: coaxially assembling the truncated cone windshield (81) above the small-caliber flanged connector (83), and fixing the position of the truncated cone windshield (81) using a dedicated positioning device (9); Step 5: Coaxially assembling the large-diameter flanged connecting piece (82) above the truncated cone windshield (81), and fixing the position of the large-diameter flanged connecting piece (82) using a dedicated positioning device (9); Step 6: spot welding the small-diameter weld (84), spot welding the large-diameter weld (85); Step 7: Fully weld the small-diameter weld (84) on the outside, and full weld the large-diameter weld (85) on the outside; Step 8: Fully weld the small-diameter weld (84) on the inside, and full weld the large-diameter weld (85) on the inside; Step nine: Take out the spiral fluidized shortening assembly (8), and the welding of the spiral fluidized shortening assembly (8) is completed.

6. The rapid manufacturing method of the spiral fluidized shortening assembly of the flash dryer according to claim 5, characterized in that: The dedicated positioning device (9) comprises a workbench (912) on which a hollow support seat (911) is fixedly provided, and a support frame (914) located on both sides of the hollow support seat (911) and fixedly connected to the workbench (912); A small-diameter lock buckle (92) for locking the small-diameter flanged connector (83) is coaxially disposed in the hollow support seat (911), and the small-diameter lock buckle (92) is connected to a bearing of the hollow support seat (911); a feeding ring (95) that can slide up and down along the support frame (914) is disposed on the two support frames (914); a large-diameter lock buckle (94) for locking the large-diameter flanged connector (82) is coaxially disposed in the feeding ring (95), and the large-diameter lock buckle (94) is connected to the hollow support seat (911). 4) connected to the bearing of the delivery ring (95); above the delivery ring (95), the two support frames (914) are also provided with a truncated cone clamping assembly (96) that can slide up and down along the support frame (914), and a supporting assembly (93) that cooperates with the truncated cone clamping assembly (96) is fixedly provided on the hollow support seat (911), the supporting assembly (93) is used to support the truncated cone windshield (81), and the supporting assembly (93) is an avoidable supporting assembly.

7. The rapid manufacturing method of the spiral fluidized shortening assembly of the flash dryer according to claim 6, characterized in that: The small-caliber lock buckle (92) comprises a small-caliber lock buckle body (921) and a small-caliber elastic snap ring (923) provided with a buckle 1 (924); the small-caliber elastic snap ring (923) is connected to the small-caliber lock buckle body (921) via a transition connection section 1 (922); the free end of the small-caliber elastic snap ring (923) is step-shaped, and the small-caliber step groove (9231) of the small-caliber elastic snap ring (923) contacts the flange end of the small-caliber flange connector (83); The large-caliber lock buckle (94) comprises a large-caliber lock buckle body (941) and a large-caliber elastic snap ring (943) provided with a second buckle (944); the large-caliber elastic snap ring (943) is integrally connected to the large-caliber lock buckle body (941) via a second transition connection section (942); the free end of the large-caliber elastic snap ring (943) is hook-shaped, and the hook portion (9431) of the large-caliber elastic snap ring (943) is used to hook the flanged end of the large-caliber flanged connector (82).

8. The rapid manufacturing method of the spiral fluidized shortening assembly of the flash dryer according to claim 7, characterized in that: The small lock buckle body (921) is connected to the inner ring bearing of the hollow support seat (911) via a small-diameter bearing (971); the large lock buckle body (941) is connected to the inner ring bearing of the sending ring (95) via a large-diameter bearing (972).

9. The rapid manufacturing method of the spiral fluidized shortening assembly of the flash dryer according to claim 6, characterized in that: The piece-feeding ring (95) comprises a piece-feeding ring body (951), and lower sliders (952) fixed at both ends of the piece-feeding ring body (951) and sleeved on the support frame (914); the two lower sliders (952) or one of the two lower sliders (952) is provided with a lower locking piece (953).

10. The rapid manufacturing method of the spiral fluidized shortening assembly of the flash dryer according to claim 6, characterized in that: The support assembly (93) comprises a fixing ring (931) fixed on a hollow support seat (911), the fixing ring (931) having a plurality of claw support pillars (932) evenly distributed in a circumferential direction, the claw support pillars (932) being connected to claws (934) capable of flipping relative to the claw support pillars (932) via glass bead screws (933), the plurality of claws (934) jointly supporting a truncated cone windshield (81) coaxially arranged with the small-caliber flanged connector (83); The truncated table clamping assembly (96) comprises a cross bar (962) whose two ends are slidably connected to the support frame (914) via upper sliders (961); a vertical bar (963) is fixedly mounted on the cross bar (962); a plurality of fork claws (964) arranged obliquely outward are evenly distributed on the free end of the vertical bar (963); and an upper locking member (965) is installed on either the two upper sliders (961) or the two upper sliders (961).

Images