CN220075526U - Spiral gradient impregnating device - Google Patents
Spiral gradient impregnating device Download PDFInfo
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- CN220075526U CN220075526U CN202322731254.8U CN202322731254U CN220075526U CN 220075526 U CN220075526 U CN 220075526U CN 202322731254 U CN202322731254 U CN 202322731254U CN 220075526 U CN220075526 U CN 220075526U
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- 238000010438 heat treatment Methods 0.000 claims abstract description 34
- 238000005470 impregnation Methods 0.000 claims abstract description 31
- 238000009413 insulation Methods 0.000 claims abstract description 24
- 230000001681 protective effect Effects 0.000 claims abstract description 24
- 239000006185 dispersion Substances 0.000 claims abstract description 16
- 230000001105 regulatory effect Effects 0.000 claims abstract description 14
- 230000008878 coupling Effects 0.000 claims abstract description 11
- 238000010168 coupling process Methods 0.000 claims abstract description 11
- 238000005859 coupling reaction Methods 0.000 claims abstract description 11
- 239000011248 coating agent Substances 0.000 claims abstract description 10
- 238000000576 coating method Methods 0.000 claims abstract description 10
- 238000007598 dipping method Methods 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 26
- 230000008569 process Effects 0.000 abstract description 22
- 239000000835 fiber Substances 0.000 abstract description 21
- 238000001125 extrusion Methods 0.000 abstract description 14
- 230000000694 effects Effects 0.000 abstract description 7
- 239000002131 composite material Substances 0.000 abstract description 6
- 239000002657 fibrous material Substances 0.000 abstract description 4
- 238000004321 preservation Methods 0.000 abstract description 4
- 229920001169 thermoplastic Polymers 0.000 abstract description 3
- 239000004416 thermosoftening plastic Substances 0.000 abstract description 3
- 230000004888 barrier function Effects 0.000 abstract 1
- 230000017525 heat dissipation Effects 0.000 abstract 1
- 239000011347 resin Substances 0.000 abstract 1
- 229920005989 resin Polymers 0.000 abstract 1
- 239000012815 thermoplastic material Substances 0.000 description 17
- 239000011295 pitch Substances 0.000 description 12
- 238000005485 electric heating Methods 0.000 description 6
- 238000005265 energy consumption Methods 0.000 description 6
- 230000000903 blocking effect Effects 0.000 description 5
- 238000009434 installation Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 230000004927 fusion Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 239000012768 molten material Substances 0.000 description 3
- 230000008439 repair process Effects 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 239000010425 asbestos Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 229910052895 riebeckite Inorganic materials 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000007970 homogeneous dispersion Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Landscapes
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model discloses a spiral gradient impregnation device, wherein an impregnation module comprises a protective cylinder, a gradient spiral shaft, a rotary column, a positioning barrier column and a temperature control unit; the uniform dispersion module comprises a uniform ring and dispersion blades; the power module comprises a driving output device and a speed regulating device; the heating module comprises a enclosing fixed body, an auxiliary heating device, a heat insulation shielding layer and a heat insulation reflecting coating; the heat shielding module comprises a coupling device, a high-temperature heat insulation device and a connecting rod. The utility model has the advantages that the fiber material and the resin melt form good impregnation in the conveying process, are fully contacted and fully mixed, can be combined by the single screw impregnation extrusion process according to different product characteristic requirements, has good heat insulation and preservation functions, reduces heat dissipation and improves the heat utilization rate, thereby realizing the ideal impregnation extrusion effect of the fiber reinforced thermoplastic composite material.
Description
Technical Field
The utility model belongs to the technical field of fiber reinforced thermoplastic composite material conveying and impregnating extrusion, and particularly relates to a spiral gradient impregnating device for a fiber reinforced thermoplastic material.
Background
In the field of fiber reinforced thermoplastic composite material conveying and dip extrusion technology, conventional single screw extruders have a number of problems in structure, mainly in the following aspects: 1. the transmission part has complex structure, large volume and inconvenient installation, maintenance and repair; 2. the heating system adopts the internal and external double-sided heating of the heating device, the heat of the internal surface of the heating device is transmitted to the charging barrel, and most of the heat of the external surface is dissipated into the air, so that the loss and the waste of electric energy are caused, and the energy consumption is greatly increased; 3. in the production process of the prior art, one method in the single screw rotary dipping extrusion process is to use a long screw with the same screw pitch, the screw can only realize the repeated use of the same process requirement, when the process requirement is changed, the whole single screw needs to be replaced again, the use cost is high, and meanwhile, the repeated use rate is low, so that the waste is caused to a certain extent; the other method is to use long screws with different pitches, but the method realizes the impregnation extrusion of fiber reinforced thermoplastic materials with different forces, but can not be flexibly adjusted according to the process requirements, and only the screws can be redesigned according to the process requirements, so that waste is caused to a certain extent; 4. because the fiber material and the melting material do circular motion in the same direction in the single screw spiral dipping extrusion process, the fiber for enhancing the strength of the product in the final product is presented in the same direction, a good dispersing effect cannot be formed, and the requirement of enhancing the strength of the product cannot be met.
Disclosure of Invention
In order to overcome the defects in the prior art, the utility model aims to provide a spiral gradient impregnation device for the field of single screw extrusion of fiber reinforced thermoplastic materials, so as to solve the following problems: 1. the prior single screw technology has the defects of complex structure, large volume and inconvenient installation, maintenance and repair of the transmission part; 2. the traditional heating mode of the heating system has the defects of large heat loss and high energy consumption; 3. the fiber material and the melting material can not form good dispersing effect in the spiral dipping extrusion process.
In order to achieve the technical purpose, the utility model adopts the following scheme: in order to solve the technical problems, the utility model provides a spiral gradient impregnation device which comprises a power module and an impregnation module; the periphery of the dipping module is provided with a heating module and a heat shielding module;
the impregnating module comprises a protective cylinder, a spiral propelling shaft, a rotating body and a temperature control unit; the spiral propelling shaft is positioned in the protective cylinder and is of a hollow structure, the rotating body is positioned at the axis of the spiral propelling shaft, and a spiral dipping flow passage is arranged between the spiral propelling shaft and the inner wall of the protective cylinder; the temperature control units are positioned at the two sides and the middle of the protective cylinder;
the heating module comprises a containment fixing body, an auxiliary heating device, a heat insulation shielding layer and a heat insulation reflecting coating; the enclosure fixing body is positioned at the periphery of the protective cylinder and used for supporting the auxiliary heating device; the auxiliary heating device is positioned in the enclosure fixing body or on the side wall; the heat-insulating shielding layer is positioned on the inner side of the enclosure fixing body, and is made of high-temperature resistant materials; the heat-insulating reflective coating is positioned at the inner side of the heat-insulating shielding layer; the high-temperature heat-resistant reflection function is achieved;
the heat shielding module comprises a coupling device, a heat insulation device and a connecting rod; the coupling device is positioned between the impregnating module and the power module; the heat insulation device is positioned in the middle of the coupling device and is made of asbestos or composite materials; the connecting rod is positioned in the speed regulating device and has a direction guiding function.
The utility model is provided with a uniform dispersion module at the joint of the spiral propulsion shaft, which comprises a uniform ring and dispersion blades; the homogenizing ring is of an annular hollow structure and is positioned on the outer edge side of the rotating body; the dispersing blades are uniformly distributed on the outer side of the homogenizing ring and synchronously incline towards the material conveying direction, and the inclination angle is 0-90 degrees.
The power module comprises a driving output device and a speed regulating device; the driving output device adopts an electric or hydraulic driving mode; the speed regulating device is regulated in an alternating current or direct current frequency conversion mode and is directly connected with the impregnating module through the heat shielding module.
The rotating pitch spacing on the spiral propulsion shafts is 10-25mm, the shaft length is 200-250mm, and the rotating pitches of the adjacently arranged spiral propulsion shafts are the same or different; the fiber reinforced thermoplastic material is conveyed to the inner cavity of the protective cylinder through the upper feed inlet of the protective cylinder, various process combinations are carried out in the inner cavity by adopting spiral propelling shafts with different rotary screw pitches, gradient dipping fusion among different rotary screw pitches is carried out on the fiber reinforced thermoplastic material, and the fiber reinforced thermoplastic material enters the next process through the lower discharge outlet of the protective cylinder after the dipping fusion is completed.
The positioning blocking column structure is a cylinder and is uniformly distributed at positioning holes on the outer surface of the casing and can be adjusted up and down; the positioning blocking column is fixed in the circumferential direction through the positioning Kong Duifen scattering blades on the upper part of the casing, so that when the spiral propulsion shaft rotates, the uniform dispersion module is in a relatively static state.
The utility model has the beneficial effects after the improvement: compared with the prior art, the spiral gradient impregnating device provided by the utility model has the following advantages:
the transmission part of the spiral gradient impregnating device is simple in structure, small in size and convenient to install, repair and maintain, and the gradient impregnating extruding and pulling and spiral dispersing in different areas in the working process of the single-screw extruding system are realized by combining the modularized impregnating extruding and pulling device with the uniform dispersing device, so that the impregnating extruding and dispersing effects of fiber reinforced thermoplastic materials are improved, and meanwhile, the problems of high heat loss, high energy consumption and high electric energy loss of the traditional heating mode of the existing structure are solved through the optimal design of the runner structure and the auxiliary heating device.
Drawings
FIG. 1 is a schematic diagram of a front view structure of the present utility model;
FIG. 2 is a schematic view of the internal cross-sectional structure of the present utility model;
FIG. 3 is a schematic perspective view of a homogeneous dispersion module;
FIG. 4 is a schematic side view of the present utility model;
FIG. 5 is a schematic view of the internal cross-sectional structure of the impregnation module;
in the figure, 1: an impregnation module; 11: a protective barrel; 12: a screw propulsion shaft; 121: gradient helical section i; 122: gradient helical section ii; 123: gradient helical section iii; 124: a feed inlet; 125, a discharge hole; 126: a head end plugging ring; 127: a terminal plugging ring; 13: a rotating body; 14: positioning a spacing column; 15: a temperature control unit; 151: a first temperature control unit; 152: a second temperature control unit; 153: a third temperature control unit; 2: a uniform dispersion module; 21: a homogenizing ring; 22: dispersing blades; 3: a power module; 31: driving an output device; 32: a speed regulating device; 4: a heating module; 41: a containment fixing body; 42: an electric heating tube; 43: a heat insulation shielding layer; 44: a thermally insulating reflective coating; 5: a heat shield module; 51: a coupling device; 52: a high temperature heat insulation device; 53: and (5) connecting a rod.
Detailed Description
The utility model is further illustrated by the following examples, which are given by way of illustration of specific construction and form of the utility model as shown in the accompanying drawings:
example 1 as shown in fig. 1-5, the spiral gradient impregnation device is exemplarily shown to comprise an impregnation module 1, a homodisperse module 2, a power module 3, a warming module 4 and a heat shielding module 5.
In this embodiment, the impregnation module 1 comprises a casing 11, a screw propulsion shaft 12, a rotating body 13, a positioning spacer 14, and a temperature control unit 15. The casing 11 is of a unitary or assembled structure, and in this embodiment, the two-sided closed structure is detachable, as shown in fig. 5, and the two-sided closed structure is a head end blocking ring 126 and a tail end blocking ring 127.
The spiral propulsion shaft 12 is positioned inside the casing 11 and is of a hollow structure; the rotating body 13 is positioned at the center of the casing 11 and the spiral propulsion shaft 12; as shown in fig. 2 and 4, the fixed-position spacing column 14 is a cylinder, can be adjusted up and down, and is uniformly distributed at the positioning holes on the outer surface of the casing 11; the temperature control units 15 are located at two sides and the middle position of the casing 11, and include a first temperature control unit 151, a second temperature control unit 152, and a third temperature control unit 153, through which the temperature detection of multiple points of the casing 11 can be achieved.
The homomorphic dispersion module 2 includes a homomorphic ring 21 and dispersion blades 22. The homogenizing ring 2 is of an annular hollow structure and is positioned on the outer edge side of the rotating body 13; the dispersing blades 22 are uniformly distributed on the outer edge of the homogenizing ring 21 and synchronously incline towards the material conveying direction, and the inclination angle is controlled to be 0-90 degrees, preferably 45 degrees.
The power module 3 includes a drive output 31 and a speed governor 32. The driving output device 31 adopts an electric or hydraulic driving mode; in this embodiment, an electric type is used, and the speed adjusting device 32 is adjusted by an ac frequency conversion method.
The heating module 4 comprises a containment fixing body 41, an auxiliary heating device consisting of a plurality of electric heating pipes 42, a heat insulation shielding layer 43 and a heat insulation reflecting coating 44. The enclosure fixing body 41 is located around the protective cylinder 11, and is used for supporting the electric heating pipe 42 and providing uniform heat supply requirements for the protective cylinder 11; as shown in fig. 4, the electric heating tube 42 is fixed at a side position of the enclosure fixing body 41; the heat insulation shielding layer 43 is positioned at the inner side of the enclosure fixing body 41 and provides heat insulation requirements, and the heat insulation shielding layer 43 is made of high-temperature resistant materials; the heat-insulating reflective coating 44 is located inside the heat-insulating shielding layer 43 and has a high-temperature heat-resistant reflection function. The heat-insulating reflective coating 44 and the heat-insulating shielding layer 43 together form an auxiliary heat-insulating structure of the enclosure fixing body 42, the auxiliary heat-insulating structure is positioned at the periphery of the heating device module 4, the overall thickness of the auxiliary heat-insulating structure is not less than 50mm, and the outer side of the auxiliary heat-insulating structure can be protected by adopting a flexible metal material.
The heat shield module 5 comprises a coupling means 51, a heat insulation means 52, a connecting rod 53. The coupling device 51 is positioned between the impregnation module 1 and the power module 3; the heat insulation device 52 is positioned in the middle of the coupling device 51 and is made of asbestos or composite materials; the connecting rod 53 is located in the speed regulating device 32 and has a direction guiding function, which can block heat conduction while driving.
In the spiral gradient dipping apparatus, as described above, the rotating body 13 is located at the axial center of the spiral propulsion shaft 12, and a spiral dipping flow path is formed between the spiral propulsion shaft 12 and the inner wall of the casing 11, and the spiral dipping flow path has a uniform cylindrical shape.
The dipping module 1 and the heating module 3 are positioned and fixed through positioning rings at two sides, and the heating module 3 carries out temperature regulation control on the protective cylinder 11 through the temperature control unit 15. As shown in fig. 5, the temperature control unit 15 includes a first temperature control unit 151, a second temperature control unit 152, and a third temperature control unit 153, which are respectively disposed at two ends and a middle of the casing 11, each temperature control unit includes one or more temperature control probe points, each module can be controlled individually or synchronously, and when the temperature of the measured temperature measuring point in the temperature control unit is lower than the preset temperature, the temperature control system flexibly adjusts the temperature of each position to reach the preset temperature requirement when the molten material is conveyed through an intelligent control mode.
The "preset temperature" may be flexibly adjusted according to actual needs, and is not particularly limited herein.
The temperature monitoring can be accurately performed in real time through a plurality of temperature control probe points. The intelligent control device is utilized to control the temperature of the impregnating module 1 in different areas, so that fault information can be fed back and collected.
Of course, the arrangement of the control unit package 15 in this embodiment is only shown as an example, and in the practical application process, those skilled in the art can perform a finer layout on the number of the temperature control units and the installation positions according to the practical requirements.
The spiral propulsion shaft 12 and the rotating body 13 realize synchronous and same-direction circular motion under the driving action of the speed regulating device 32; the screw propulsion shaft 12 and the homodisperse module 2 perform relative circular motion.
The pitch of the screw propulsion shaft 12 is 10-25mm, the shaft length is 200-250mm, the fiber reinforced thermoplastic material is conveyed to the cavity inside the casing 11 through the feed inlet 124 at the upper part of the casing 11, the screw propulsion shaft 12 with different screw pitches is adopted in the cavity to perform process combination, the fiber reinforced thermoplastic material is subjected to gradient impregnation and fusion among different screw pitches, and the fiber reinforced thermoplastic material enters the next process through the discharge outlet 125 at the lower part of the casing 11 after the impregnation and fusion are completed.
The fixed-position spacing columns 14 are fixed in the circumferential direction through the upper positioning Kong Duifen of the casing 11 and the scattering blades 22, so that the uniform dispersion module 2 is in a relatively static state when the spiral propulsion shaft 12 rotates.
When the spiral gradient impregnation device is used, the power module 3 carries out spiral gradient impregnation mixed driving of the fiber reinforced thermoplastic materials in an electric driving mode, the installation is convenient, the disassembly is easy, the conveying speed in the conveying process of the fiber reinforced thermoplastic materials can be regulated in a variable frequency mode by utilizing the speed regulating device 32 in the power module 3, the inside of the protective cylinder 11 is divided into 5 areas, the spiral propulsion shafts 12 with different screw pitches can be freely combined in use, such as a gradient spiral section I121, a gradient spiral section II 122, a gradient spiral section III 123, a gradient spiral section IV (not labeled) and a gradient spiral section V (not labeled), when the fiber reinforced thermoplastic materials are conveyed, different gradient spiral dip extrusion of the molten materials in different areas can be realized under the same rotating speed condition, the dip extrusion mode of different screw pitches and different forces can be realized in even more areas in 5 areas in the protective cylinder 11, and the dip extrusion and dispersion effects of the fiber reinforced thermoplastic materials are effectively improved. On the basis of the structure, the utility model provides the heating module 4 by further optimizing the auxiliary heating device, wherein a plurality of electric heating pipes 42 are of annular structures, the intervals between the electric heating pipes and the periphery of the protective cylinder 11 are the same, one part of the generated annular heat radiation field heats the protective cylinder 11 to provide uniform heating requirements for the surface of the protective cylinder 11, the other part of heat is blocked by the heat insulation shielding layer 43 to prevent heat loss, and the heat loss is reflected and blocked by the heat insulation shielding layer 43 and the heat insulation reflection coating 44 on the surface to further ensure the heat requirements for the surface of the protective cylinder 11, so that the heat loss in the heat source providing process is reduced, and the problems of large heat loss, high energy consumption and large electric energy loss of the traditional heating mode of the conventional structure are solved to the greatest extent.
The utility model optimizes and improves the screw propeller shafts, uses a plurality of groups of screw propeller shafts 12 with different or same screw pitches and 200-250mm length, freely combines the screw propeller shafts 12 according to different process requirements, and can realize the repeated utilization of screw rods and flexible process adjustment requirements, thereby ensuring the uniform mixing of molten materials and fiber materials to the greatest extent.
Still further, the utility model adopts the combination of the uniform dispersion module 2 and the spiral propulsion shaft 12 in the protection barrel 11 in the horizontal direction, when the spiral propulsion shaft 12 and the rotary body 13 do the same-direction circular motion under the action of the power module 3, the uniform dispersion module 2 keeps a relative static state under the action of the positioning blocking column 14, meanwhile, fiber reinforced thermoplastic materials in a cavity flow channel in the protection barrel 11 are immersed and extruded by the spiral propulsion shaft 12 and then are dispersed into a next immersed and extruded section by the dispersion blades 22, the effects of immersing, extruding, pulling and dispersing and reinforcing the fiber reinforced thermoplastic materials are improved by the immersing, extruding and dispersing processes in a circulating way, the dispersion blades 22 are arranged in the circumferential direction of the uniform ring 21 and have an inclined angle of 45 degrees, the extrusion and stirring in the material advancing process can be further realized, the inner diameter of the center hole of the uniform ring 21 is larger than the outer diameter of the rotary body 13, both sides in the axial direction of the uniform ring 21 are the spiral propulsion shaft 12, the contact part adopts the shaft sleeve with the temperature resistance of not lower than 200 ℃, and the influence of the running high temperature on two adjacent parts is prevented.
In another preferred embodiment of the present utility model, the spiral gradient impregnation device further comprises an external heat preservation device (not shown in the figure), the external heat preservation device is made of a high temperature resistant composite material, covers the periphery of the impregnation module 1, adopts a metal structural plate for waterproof protection, and can externally realize secondary heat preservation protection.
In summary, the utility model solves the problems of complex structure, large volume, inconvenient installation and maintenance, large heat loss in the traditional heating mode of the heating system and high energy consumption of the transmission part of the spiral gradient impregnation device, creatively utilizes the modularized impregnation extruding and pulling device combination, realizes the gradient impregnation extruding and pulling of multi-region matching in the working process of the single screw extrusion system, improves the impregnating extruding and pulling and dispersing effects of the fiber reinforced thermoplastic material, and simultaneously realizes the problems of small heat loss and low energy consumption in the heating mode through the optimized design of the flow channel structure and the auxiliary heating device.
Claims (5)
1. A spiral gradient impregnation device, characterized in that: comprises a power module and an impregnation module; the periphery of the dipping module is provided with a heating module and a heat shielding module;
the impregnating module comprises a protective cylinder, a spiral propelling shaft, a rotating body and a temperature control unit; the spiral propelling shaft is positioned in the protective cylinder and is of a hollow structure, the rotating body is positioned at the axis of the spiral propelling shaft, and a spiral dipping flow passage is arranged between the spiral propelling shaft and the inner wall of the protective cylinder; the temperature control units are positioned at the two sides and the middle of the protective cylinder;
the heating module comprises a containment fixing body, an auxiliary heating device, a heat insulation shielding layer and a heat insulation reflecting coating; the enclosure fixing body is positioned at the periphery of the protective cylinder and used for supporting the auxiliary heating device; the auxiliary heating device is positioned in the enclosure fixing body or on the side wall; the heat-insulating shielding layer is positioned on the inner side of the enclosure fixing body, and is made of high-temperature resistant materials; the heat-insulating reflective coating is positioned at the inner side of the heat-insulating shielding layer;
the heat shielding module comprises a coupling device, a heat insulation device and a connecting rod; the coupling device is positioned between the impregnating module and the power module; the heat insulation device is positioned in the middle of the coupling device; the connecting rod is positioned in the speed regulating device.
2. A spiral gradient impregnation device as claimed in claim 1, wherein: the spiral gradient impregnation device is provided with a uniform dispersion module at the joint of a spiral propulsion shaft, and comprises a uniform ring and dispersion blades; the homogenizing ring is of an annular hollow structure and is positioned on the outer edge side of the rotating body; the dispersing blades are uniformly distributed on the outer side of the homogenizing ring and synchronously incline towards the material conveying direction, and the inclination angle is 0-90 degrees.
3. A spiral gradient impregnation device as claimed in claim 1, wherein: the power module comprises a driving output device and a speed regulating device; the driving output device adopts an electric or hydraulic driving mode; the speed regulating device is regulated in an alternating current or direct current frequency conversion mode and is directly connected with the impregnating module through the heat shielding module.
4. A spiral gradient impregnation device as claimed in claim 1, wherein: the pitch of the rotating screw on the screw propulsion shaft is 10-25mm, the shaft length is 200-250mm, and the pitch of the rotating screw on the adjacently arranged screw propulsion shafts is the same or different.
5. A spiral gradient impregnation device as claimed in claim 1, wherein: the positioning hole on the outer surface of the casing is provided with a fixed-steric spacing column which is a cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322731254.8U CN220075526U (en) | 2023-10-12 | 2023-10-12 | Spiral gradient impregnating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322731254.8U CN220075526U (en) | 2023-10-12 | 2023-10-12 | Spiral gradient impregnating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220075526U true CN220075526U (en) | 2023-11-24 |
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ID=88819107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322731254.8U Active CN220075526U (en) | 2023-10-12 | 2023-10-12 | Spiral gradient impregnating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220075526U (en) |
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2023
- 2023-10-12 CN CN202322731254.8U patent/CN220075526U/en active Active
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