A homogenous mixing device for flame retardant PVC film raw materials

Abstract

The invention relates to a homogenizing device for flame-retardant PVC film raw materials, comprising an external support structure, a stirring structure and a cooling structure. The external support structure is composed of an external support cylinder, a feeding and discharging mechanism at two ends and an internal annular gasket ring, the gasket ring is provided with a sliding support groove, the stirring structure is composed of an external stirring cylinder and an internal stirring cylinder, the external stirring cylinder is connected to the gasket ring through the sliding support groove, the internal stirring cylinder is in sliding sealing contact with the feeding and discharging mechanism, the cooling structure is located between the external support cylinder and the external stirring cylinder, a cooling medium is filled therein and circulates for heat exchange, the external stirring cylinder and the internal stirring cylinder are driven by an external driving shaft and an internal driving shaft respectively, and the inner wall of the cylinder is provided with extrusion and stirring protrusions.

Description

Technical Field

[0001] The invention relates to a homogenous mixing device for flame-retardant PVC film raw materials, belonging to the field of PVC material mixing equipment. Background Art

[0002] The heat generation problem during the mixing process of PVC flame retardant materials is a technical difficulty that requires special attention. Because PVC flame retardant materials contain many components with longer molecules, during the stirring and shearing process, the molecular force will be converted into heat, and excessive heat will easily lead to the degradation of PVC and the decomposition of flame retardants. The degradation of PVC and the decomposition of flame retardants will not only generate a large amount of additional heat, but also affect the strength and flame retardant effect of PVC injection moldings. Although reducing the mixing rate will reduce the heat generation, it will affect the hardness of PVC in the softened state. Too long mixing time will easily cause the PVC material to harden, affecting the mixing effect. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the technical problems in the prior art and provide a homogenous mixing device for flame retardant PVC film raw materials.

[0004] The technical solution adopted by the present invention to solve its technical problem is:

[0005] A homogenizing device for flame retardant PVC film raw materials, comprising:

[0006] The outer support structure includes an outer support tube, at both ends of which a head feeding mechanism and a tail discharging mechanism are sealed and fixed; a plurality of annular outer support gasket rings are arranged in a linear array inside the outer support tube, and the inner ring of the outer support gasket ring is provided with two groups of sliding support grooves arranged mirror-symmetrically relative to the plane of the outer support gasket ring;

[0007] A stirring structure, the stirring structure comprises an outer stirring mechanism coaxially fixed to the inner ring of the outer supporting cylinder through a supporting baffle and an inner stirring mechanism coaxially arranged in the middle of the outer stirring mechanism;

[0008] And, a cooling structure, the cooling structure includes a cooling cavity arranged between the outer support cylinder and the outer stirring mechanism, the cooling cavity is filled with a cooling medium, and the cooling medium circulates through the heat exchange mechanism to exchange heat;

[0009] The external stirring mechanism includes an external stirring drum with a conical structure, the flared end of the external stirring drum is located at the head feeding mechanism position, the external stirring drum includes a plurality of stator outer rings and rotor outer rings of annular structures stacked on each other, the two ends of the stator outer ring and the rotor outer ring are connected to the external support ring through sliding support grooves, and the stator outer rings at both ends of the external stirring drum are fixed to the head feeding mechanism and the tail discharging mechanism;

[0010] A plurality of external support ribs are fixed in an array on the inner wall of the outer support cylinder, and one end of the external support ribs is fixed to the outer wall of the stator outer ring; an external drive shaft is provided through each external support gasket ring and is rotatably connected to the external support gasket ring, and the external drive shaft is driven by an external rotary drive mechanism, and an annular drive ring is provided on the outer wall of the rotor outer ring, and the drive ring is drivingly connected to the external drive shaft;

[0011] The inner stirring mechanism comprises an inner stirring drum with a conical structure, the constricted end of the inner stirring drum is located at the position of the head feeding mechanism, the front end of the inner stirring drum is in sliding sealing contact with the head feeding mechanism, the tail of the inner stirring drum is in sliding sealing contact with the tail discharging mechanism, an inner driving shaft is connected to the middle of the inner stirring drum, the two ends of the inner driving shaft are respectively rotatably connected to the head feeding mechanism and the tail discharging mechanism, and the inner driving shaft is connected to an inner rotating driving mechanism;

[0012] Among them, a spiral outer extrusion protrusion is arranged on the inner wall of the rotor outer ring, a rod-shaped outer stirring protrusion is arranged on the inner wall of the stator outer ring, and a spiral inner extrusion protrusion is arranged on the outer wall of the inner stirring drum.

[0013] As a further improvement of the present invention, an annular support rib concentric with the outer support ring is provided on the outer support ring, and a plurality of rotation connection holes are provided in an annular array on the annular support rib, and the outer drive shaft is rotationally connected to the rotation connection hole;

[0014] The support rib structure can prevent the possibility of deformation or damage of the outer support ring due to distortion caused by tangential force when the outer drive shaft is driven in rotation; at the same time, it can improve the stability of the rotation of the outer drive shaft and increase the number of contact points of rotational contact.

[0015] As a further improvement of the present invention, an annular outer contact support ring protruding on both sides of the outer support gasket ring is provided on the outer ring of the outer support gasket ring, and the outer contact support ring is fixed to the inner wall of the outer support tube by interference fit;

[0016] The outer contact support ring can increase the contact area relative to the inner wall of the outer support tube, improve the torsional resistance of the outer contact support ring relative to the inner wall of the outer support tube, and at the same time provide annular structural support for the outer contact support ring, reducing the possibility of deformation of the outer contact support ring.

[0017] As a further improvement of the present invention, a threaded connection hole is provided on the outer support tube, the outer support rib is fixed to the wall surface of the outer support tube by threads, an outer support ring is provided on the outer wall surface of the stator outer ring, and the end of the outer support rib is embedded in the outer support ring;

[0018] The support ribs are connected by threads, which not only facilitates the fixing and loosening of the stator outer ring, but also provides stable extrusion support for the stator outer ring through the axial locking force of the threads, thereby reducing the possibility of deformation of the stator outer ring due to material extrusion.

[0019] As a further improvement of the present invention, the inner mixing drum comprises a plurality of mutually stacked middle inner spiral drums and head inner spiral drums and tail inner spiral drums at both ends. The adjacent middle inner spiral drums, the head inner spiral drum and the middle inner spiral drum, and the tail inner spiral drum and the middle inner spiral drum are connected by inner support gaskets. Two groups of inlay grooves are arranged on the outer ring of the inner support gasket in a mirror-symmetrical manner. The ends of the middle inner spiral drum, the head inner spiral drum and the tail inner spiral drum are embedded in the inlay grooves. A A head adapter ring, a tail adapter ring is arranged at the tail of the tail inner spiral barrel, the inner rings of the head adapter ring and the tail adapter ring are provided with inner connecting flanges, and a main screw is arranged between the inner connecting flanges of the head adapter ring and the tail adapter ring; a head drive disk is fixed to the inner ring of the head adapter ring through the main screw, and a tail drive disk is fixed to the inner ring of the tail adapter ring through the main screw, and the inner drive shaft includes a head drive shaft and a tail drive shaft, wherein the head drive shaft is vertically fixed to the head drive disk, and the tail drive shaft is vertically fixed to the tail drive disk;

[0020] The inner mixing drum is divided into a plurality of middle inner spiral drums arranged in an array, which is not only convenient for manufacturing but also can reduce the cost of replacing the inner extrusion protrusion after it is worn.

[0021] As a further improvement of the present invention, the head feeding mechanism includes a front end connecting ring, which is sealingly connected to the front end annular opening position of the outer support tube and the outer mixing tube; the tail discharging mechanism includes a tail connecting ring, which is sealingly connected to the rear end annular opening position of the outer support tube and the outer mixing tube; the head feeding mechanism also includes a head feeding ring, the outer ring of the head feeding ring is in sealing contact with the inner ring of the front end connecting ring, the inner ring of the head feeding ring is provided with a front end sealing groove, and the end of the head adapter ring is in sliding sealing contact with the front end sealing groove; the tail discharging mechanism also includes a tail discharging ring, the outer ring of the tail discharging ring is in sealing contact with the inner ring of the tail connecting ring, the inner ring of the tail discharging ring is provided with a tail sealing groove, and the end of the tail adapter ring is in sliding sealing contact with the tail sealing groove;

[0022] The head feeding mechanism and the tail feeding mechanism use a front connecting ring and a tail connecting ring to achieve sliding sealing contact at both ends of the inner mixing drum, thereby ensuring the sealing efficiency while ensuring the rotation.

[0023] As a further improvement of the present invention, the head feeding mechanism includes a head feeding hopper which is an integral structure with the head feeding ring, the head feeding hopper includes a front end outer shell which is an integral structure with the outer ring of the head feeding ring, a front end inner shell is fixed to the inner ring of the front end outer shell by connecting ribs, the front end inner shell and the inner ring of the head feeding ring are an integral structure, a front end rotating sleeve is provided between the middle part of the front end inner shell and the middle part of the front end outer shell, and the head driving shaft is rotatably connected to the front end rotating sleeve; the tail discharging mechanism includes a tail discharging hopper which is an integral structure with the tail discharging ring, the tail discharging hopper includes a tail outer shell which is an integral structure with the outer ring of the tail discharging ring, a tail inner shell is fixed to the inner ring of the tail outer shell by connecting ribs, the tail inner shell and the inner ring of the tail discharging ring are an integral structure, a tail rotating sleeve is provided between the middle part of the tail inner shell and the middle part of the tail outer shell, and the tail driving shaft is rotatably connected to the tail rotating sleeve;

[0024] The head feed hopper and the tail discharge hopper use an inner and outer double-layer structure, which realizes the annular connection between the stirring gap between the outer stirring mechanism and the inner stirring mechanism relative to the head feed hopper and the end discharge hopper, ensuring the maximization of the opening area and improving the efficiency of feeding and discharging.

[0025] As a further improvement of the present invention, a plurality of motor seats corresponding to each other are arranged in an annular array on the head feed ring and the tail discharge ring, and the external rotary drive mechanism includes an external drive motor embedded in the motor seat, and the corresponding external drive motors in the two groups of motor seats are fixed to the same external drive shaft;

[0026] The motor seat is integrated on the head feed ring and the tail discharge ring to ensure the fixing strength of the motor. At the same time, the two groups of motors share a set of external drive shafts, which can reduce the torsion degree of the external drive shaft caused by the change of torque transmission gradient, increase the life of the external drive shaft, and improve the mixing efficiency.

[0027] As a further improvement of the present invention, the front connecting ring and the rear connecting ring are connected to the end of the outer support tube through a flange ring, and an end bracket is also connected to the flange ring of the front connecting ring and the rear connecting ring, and the end bracket includes an inner support plate and an outer support plate stacked on each other, and the outer sides of the inner support plate and the outer support plate are in contact with the ground; wherein a support column is arranged between the inner support plate and the outer support plate; wherein the inner support plate is an annular structure, and a middle rotating support seat is arranged in the middle of the outer support plate;

[0028] The connecting frame can realize the overall placement of the mechanism without adding connecting positions on the functional components, thereby ensuring the stable operation and strength of the functional components.

[0029] As a further improvement of the present invention, a plurality of driving gears corresponding to the driving ring are arranged in a linear array on the outer driving shaft, the driving ring is a driving gear ring, and the driving gears and the driving gear ring are connected by a synchronous toothed belt transmission;

[0030] The synchronous toothed belt drive not only has high transmission efficiency, but also the speed can be controlled more accurately, making it easy to adjust the stirring rate.

[0031] The beneficial effects of the present invention are:

[0032] The present invention has an external stirring mechanism and an internal stirring mechanism that can rotate differentially through the inner ring and the outer ring, and has a higher stirring efficiency than the single-acting spiral stirring mechanism in the prior art; and the partially rotating external stirring mechanism is combined with a cooling structure arranged on the outside of the external stirring mechanism to ensure the heat transfer efficiency between the cooling medium and the PVC and the flame retardant material while stirring. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0034] Figure 1 It is a cross-sectional schematic diagram of the present invention;

[0035] Figure 2 is a schematic diagram of the structure of the outer support ring;

[0036] Figure 3 Schematic diagram of the structure of the inner support ring;

[0037] 1. Middle inner spiral barrel; 2. Inlay groove; 3. Inner support ring; 4. Main screw; 5. Head inner spiral barrel; 6. Head adapter ring; 7. Head drive plate; 8. Locking nut; 9. Tail inner spiral barrel; 10. Tail adapter ring; 11. Tail drive plate; 12. Middle positioning nut; 13. Head feed hopper; 14. Head drive shaft; 15. Head feed pipe; 16. Head feed ring; 17. Tail drive shaft; 18. Tail discharge hopper; 19. Tail discharge ring; 20. Tail discharge pipe; 21. Inner extrusion protrusion; 22. Outer support ring; 23. Annular support rib ; 24. External contact support ring; 25. External support rib; 26. External support ring; 27. Stator outer ring; 28. Stator bushing; 29. ​​External extrusion protrusion; 30. Rotor outer ring; 31. Drive gear ring; 32. Rotor bushing; 33. Drive gear; 34. External drive shaft; 35. Synchronous toothed belt; 36. External stirring protrusion; 37. External drive motor; 38. Upper cold flow inlet; 39. Upper cold flow outlet; 40. Connecting rib; 41. Middle rotation support seat; 42. Inner support plate; 43. Outer support plate; 44. Rotary connection hole; 45. Screw hole; 46. External support cylinder. DETAILED DESCRIPTION

[0038] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0039] A homogenizing device for flame retardant PVC film raw materials, comprising:

[0040] The outer support structure includes an outer support tube 46, at both ends of which a head feeding mechanism and a tail discharging mechanism are sealed and fixed; a plurality of annular outer support gasket rings 22 are arranged in a linear array inside the outer support tube 46, and an annular outer contact support ring 24 protruding on both sides of the outer support gasket ring 22 is arranged on the outer ring of the outer support gasket ring 22, and the outer contact support ring 24 is fixed to the inner wall of the outer support tube 46 by interference fit, and the inner ring of the outer support gasket ring 22 is provided with two groups of sliding support grooves arranged in a mirror-symmetrical manner relative to the plane of the outer support gasket ring 22;

[0041] A stirring structure, the stirring structure includes an outer stirring mechanism coaxially fixed to the inner circle of the outer support cylinder 46 through a supporting baffle and an inner stirring mechanism coaxially arranged in the middle of the outer stirring mechanism;

[0042] And, the cooling structure includes a cooling chamber arranged between the outer support tube 46 and the external stirring mechanism, the cooling chamber is filled with a cooling medium, and the cooling medium circulates and exchanges heat through the heat exchange mechanism; an upper cold liquid inlet 38 and an upper cold liquid outlet 39 are respectively arranged at the top of both ends of the outer support tube 46, and a lower cold liquid inlet and a lower cold liquid outlet are respectively arranged at the bottom of both ends of the lower outer support tube 46.

[0043] Among them, the external stirring mechanism includes an external stirring drum with a conical structure, the flared end of the external stirring drum is located at the head feeding mechanism position, the external stirring drum includes a plurality of stator outer rings 27 and rotor outer rings 30 of annular structures stacked on each other, the two ends of the stator outer ring 27 and the rotor outer ring 30 are connected to the outer support gasket 22 through sliding support grooves, and the stator outer rings 27 at both ends of the external stirring drum are fixed to the head feeding mechanism and the tail discharging mechanism.

[0044] A plurality of outer support ribs 25 are fixed in an array on the inner wall of the outer support tube 46. A threaded connection hole is provided on the outer support tube 46. The outer support ribs 25 are fixed to the wall surface of the outer support tube 46 by threads. One end of the outer support rib 25 is fixed to the outer wall of the stator outer ring 27. An outer support ring 26 is provided on the outer wall surface of the stator outer ring 27. The end of the outer support rib 25 is embedded in the outer support ring 26. An outer drive shaft 34 is provided through each outer support gasket ring 22 and is rotatably connected to the outer support gasket ring 22. The outer support gasket ring 26 is provided with a plurality of outer support ribs 25. 2 is provided with an annular support rib 23 which is concentric with the outer support pad ring 22, and a plurality of rotation connection holes 44 are provided in an annular array on the annular support rib 23, and an outer drive shaft 34 is rotationally connected with the rotation connection holes 44, and the outer drive shaft 34 is driven by an external rotation drive mechanism; a plurality of drive gears 33 corresponding to the drive ring are provided in a linear array on the outer drive shaft 34, and an annular drive gear ring 31 is provided on the outer wall of the rotor outer ring 30, and the drive gear 33 and the drive gear ring 31 are connected by a synchronous toothed belt 35.

[0045] The inner stirring mechanism comprises an inner stirring drum with a conical structure, the constricted end of the inner stirring drum is located at the position of the head feeding mechanism, the front end of the inner stirring drum is in sliding sealing contact with the head feeding mechanism, the tail of the inner stirring drum is in sliding sealing contact with the tail discharging mechanism, an inner driving shaft is connected to the middle of the inner stirring drum, the two ends of the inner driving shaft are respectively connected to the head feeding mechanism and the tail discharging mechanism for rotation, and the inner driving shaft is connected to an inner rotating driving mechanism; the inner stirring drum comprises a plurality of inner spiral drums 1 and 2 arranged in a stacked manner. The head inner spiral cylinder 5 and the tail inner spiral cylinder 9 at both ends, the adjacent middle inner spiral cylinders 1, the head inner spiral cylinder 5 and the middle inner spiral cylinder 1, and the tail inner spiral cylinder 9 and the middle inner spiral cylinder 1 are connected by an inner support ring 3. Two groups of inlay grooves 2 are mirror-symmetrically arranged on the outer ring of the inner support ring 3. The ends of the middle inner spiral cylinder 1, the head inner spiral cylinder 5, and the tail inner spiral cylinder 9 are embedded in the inlay grooves 2. A head adapter ring 6 is arranged at the front end of the head inner spiral cylinder 5, and a head adapter ring 6 is arranged at the tail inner spiral cylinder 9. The tail of the barrel is provided with a tail adapter ring 10, the inner rings of the head adapter ring 6 and the tail adapter ring 10 are provided with inner connecting flanges, a main screw 4 is provided between the inner connecting flanges of the head adapter ring 6 and the tail adapter ring 10, and a plurality of screw holes 45 are provided in a circular array on the inner support pad ring 3; a head drive disk 7 is fixed to the inner ring of the head adapter ring 6 through the main screw 4, and a tail drive disk 11 is fixed to the inner ring of the tail adapter ring 10 through the main screw 4, and the inner drive shaft includes a head drive shaft 14 and a tail drive shaft 15. The main screw 4 is provided with a plurality of middle positioning nuts 12, and locking nuts 8 are provided at both ends of the main screw 4. The locking nuts 8 are used to realize the axial limitation of the head adapter ring 6, the head drive disk 7, the head inner spiral barrel, the tail inner spiral barrel, the tail drive disk 11, and the tail adapter ring 10, and the positioning and fixing of the inner support gasket ring 3 are realized through the middle positioning nut 12.

[0046] Among them, a spiral external extrusion protrusion 29 is arranged on the inner wall of the rotor outer ring 30 through the rotor bushing 32, and the rotor bushing 32 and the external extrusion protrusion 29 are an integrated structure. A rod-shaped external stirring protrusion 36 is arranged on the inner wall of the stator outer ring 27 through the stator bushing 28, and the stator bushing 28 and the external stirring protrusion 36 are an integrated structure. A spiral internal extrusion protrusion 21 is arranged on the outer wall of the inner mixing drum.

[0047] The head feeding mechanism includes a front end connecting ring, which is sealed and connected to the front end annular opening position of the outer support tube 46 and the outer mixing tube; the tail discharging mechanism includes a tail connecting ring, which is sealed and connected to the rear annular opening position of the outer support tube 46 and the outer mixing tube; the head feeding mechanism also includes a head feeding ring 16, the outer ring of the head feeding ring 16 is in sealing contact with the inner ring of the front end connecting ring, and the inner ring of the head feeding ring 16 is provided with a front end sealing groove, and the end of the head adapter ring 6 is slidably sealed with the front end sealing groove The tail discharging mechanism also includes a tail discharging ring 19, the outer ring of the tail discharging ring 19 is in sealing contact with the inner ring of the tail connecting ring, the inner ring of the tail discharging ring 19 is provided with a tail sealing groove, and the end of the tail adapter ring 10 is in sliding sealing contact with the tail sealing groove; the head feeding mechanism includes a head feeding hopper 13 with an integral structure with the head feeding ring 16, a head feeding pipe 15 is integrally connected to the top of the head feeding hopper 13, and the head feeding hopper 13 includes a front end shell with an integral structure with the outer ring of the head feeding ring 16, The inner ring of the front end outer shell is fixed with a front end inner shell by connecting ribs 40, and the front end inner shell and the inner ring of the head feed ring 16 are an integral structure. A front end rotating sleeve is arranged between the middle part of the front end inner shell and the middle part of the front end outer shell, and the head drive shaft 14 is rotatably connected with the front end rotating sleeve; the tail discharge mechanism includes a tail discharge hopper 18 with an integral structure with the tail discharge ring 19, and the tail of the tail discharge hopper 18 is connected with an integral tail discharge pipe 20, and the tail discharge hopper 18 includes a tail outer shell with an integral structure with the outer ring of the tail discharge ring 19, and at the tail The inner ring of the outer shell is fixed with a tail inner shell by connecting ribs 40. The tail inner shell and the inner ring of the tail discharge ring 19 are an integrated structure. A tail rotating sleeve is arranged between the middle part of the tail inner shell and the middle part of the tail outer shell, and the tail drive shaft 17 is rotatably connected to the tail rotating sleeve. A plurality of corresponding motor seats are arranged in a circular array on the head feed ring 16 and the tail discharge ring 19, and the external rotation drive mechanism includes an external drive motor 37 embedded in the motor seat, and the corresponding external drive motors 37 in the two groups of motor seats are fixed to the same external drive shaft 34.

[0048] The front end connecting ring and the rear end connecting ring are connected to the end of the outer support tube 46 through flange rings, and the flange rings of the front end connecting ring and the rear end connecting ring are also connected to an end bracket, and the end bracket includes an inner support plate 42 and an outer support plate 43 stacked on each other, and the outer sides of the inner support plate 42 and the outer support plate 43 are in contact with the ground; wherein, a support column is arranged between the inner support plate 42 and the outer support plate 43; wherein, the inner support plate 42 is an annular structure, and a middle rotating support seat 41 is arranged in the middle of the outer support plate 43.

[0049] When in use, the material enters the head feed hopper 13 from the head feed pipe 15, and then passes through the annular space in the head feed hopper 13, and evenly enters the gap between the inner spiral barrel and the inner mixing barrel through the head feed ring 16; at this time, the middle inner spiral barrel 1 transmits power to the head drive disk 7 and the tail drive disk 11 through the head drive shaft 14 and the tail drive shaft 17, and drives each inner support ring through the main screw 4 to realize the rotation of each middle inner spiral barrel 1 and the head inner spiral barrel and the tail inner spiral barrel. The rotation of the entire inner mixing barrel will cause the inner ring of the material to move toward the front end of the inner mixing barrel under the drive of the spiral inner extrusion protrusion 21. Because the thread inside the stator outer ring 27 is a fixed structure, the material will be squeezed on the outer extrusion protrusion 2 Under the joint action of the two opposite spirals 9 and the inner extrusion protrusion 21, the material located on the surface of the inner mixing drum will move forward, while the material located on the inner wall of the outer mixing drum, that is, the stator outer ring 27, will move backward due to the opposite spiral, thereby realizing the overall turning and shearing of the material; at the same time, through the rotation of the external drive motor 37, through the transmission of the drive gear 33 and the drive gear ring 31, the rotor outer ring 30 of the outer mixing drum will rotate relative to the regular outer ring, so that the outer stirring protrusion 36 located on the inner wall of the stator outer ring 27 will additionally stir the material, and finally be discharged through the gap between the inner mixing drum and the outer mixing drum, and enter the tail discharge ring 19, and then pass through the annular space of the tail discharge hopper 18 and be discharged through the tail discharge pipe.

[0050] While the material is being stirred, an inert cooling gas can be introduced into the upper cold flow inlet through the upper cold flow inlet, upper cold flow outlet, lower cold flow inlet and lower cold flow outlet of the outer support cylinder 46, and the cooling gas sinks to exchange heat with the outer mixing cylinder as a whole, and then the heated cooling gas is discharged through the upper cold flow outlet at the top, thereby cooling the stirring process, and part of the water vapor liquefied by the cooling gas can be discharged through the lower cold flow outlet at the bottom, and the water vapor mainly comes from the gaps where the rotating seals contact; in a low-temperature working environment, high-temperature heating gas can be introduced through the lower cold flow inlet, and the heating gas can be discharged through the lower cold flow outlet at the other end, thereby heating the entire stirring process.

[0051] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A homogenizing device for flame retardant PVC film raw materials, characterized in that: include: An outer support structure, the outer support structure comprising an outer support cylinder (46), a head feeding mechanism and a tail discharging mechanism being sealed and fixed at both ends of the outer support cylinder (46); a plurality of annular outer support gasket rings (22) are arranged in a linear array inside the outer support cylinder (46), and the inner ring of the outer support gasket ring (22) is provided with two groups of sliding support grooves arranged in a mirror-symmetrical manner relative to the plane of the outer support gasket ring (22); A stirring structure, the stirring structure comprising an outer stirring mechanism coaxially fixed to the inner ring of the outer support cylinder (46) through a supporting baffle, and an inner stirring mechanism coaxially arranged in the middle of the outer stirring mechanism; and a cooling structure, the cooling structure comprising a cooling chamber arranged between the outer support cylinder (46) and the outer stirring mechanism, the cooling chamber being filled with a cooling medium, the cooling medium circulating through the heat exchange mechanism to exchange heat; The external stirring mechanism comprises an external stirring drum with a conical structure, the flared end of the external stirring drum is located at the head feeding mechanism position, the external stirring drum comprises a plurality of stator outer rings (27) and rotor outer rings (30) of annular structure stacked on each other, both ends of the stator outer ring (27) and the rotor outer ring (30) are connected to the external support gasket (22) through sliding support grooves, and the stator outer rings (27) at both ends of the external stirring drum are fixed to the head feeding mechanism and the tail discharging mechanism; A plurality of external support ribs (25) are fixed in an array on the inner wall of the external support cylinder (46), one end of the external support ribs (25) being fixed to the outer wall of the stator outer ring (27); an external drive shaft (34) is provided through each external support gasket ring (22) and is rotatably connected to the external support gasket ring (22); the external drive shaft (34) is driven by an external rotary drive mechanism; an annular drive ring is provided on the outer wall of the rotor outer ring (30), and the drive ring is drivingly connected to the external drive shaft (34); The inner stirring mechanism comprises an inner stirring drum with a conical structure, the constricted end of the inner stirring drum is located at the position of the head feeding mechanism, the front end of the inner stirring drum is in sliding sealing contact with the head feeding mechanism, the tail of the inner stirring drum is in sliding sealing contact with the tail discharging mechanism, an inner driving shaft is connected to the middle of the inner stirring drum, the two ends of the inner driving shaft are respectively rotatably connected to the head feeding mechanism and the tail discharging mechanism, and the inner driving shaft is connected to an inner rotating driving mechanism; A spiral external extrusion protrusion (29) is provided on the inner wall of the rotor outer ring (30), a rod-shaped external stirring protrusion (36) is provided on the inner wall of the stator outer ring (27), and a spiral internal extrusion protrusion (21) is provided on the outer wall of the inner stirring drum.

2. The homogenizing device for flame retardant PVC film raw materials according to claim 1, characterized in that: An annular support rib (23) concentric with the outer support gasket ring (22) is provided on the outer support gasket ring (22), a plurality of rotation connection holes (44) are provided in an annular array on the annular support rib (23), and the outer drive shaft (34) is rotationally connected to the rotation connection holes (44).

3. The homogenizing device for a flame retardant PVC film raw material as claimed in claim 1, characterized in that: An annular outer contact support ring is provided on the outer ring of the outer support gasket ring (22) and is raised on both sides of the outer support gasket ring (22). The outer contact support ring is fixed to the inner wall of the outer support cylinder (46) by interference fit.

4. The homogenizing device for flame retardant PVC film raw materials according to claim 1, characterized in that: A threaded connection hole is provided on the outer support tube (46), the outer support rib (25) is fixed to the wall surface of the outer support tube (46) by means of threads, an outer support ring (26) is provided on the outer wall surface of the stator outer ring (27), and the end of the outer support rib (25) is embedded in the outer support ring (26).

5. The homogenizing device for flame retardant PVC film raw materials according to claim 1, characterized in that: The inner mixing drum comprises a plurality of mutually stacked middle inner spiral drums (1) and head inner spiral drums (5) and tail inner spiral drums (9) located at two ends. The adjacent middle inner spiral drums (1), the head inner spiral drum (5) and the middle inner spiral drum (1), and the tail inner spiral drum (9) and the middle inner spiral drum (1) are connected via inner support rings (3). Two groups of inlay grooves (2) are mirror-symmetrically arranged on the outer ring of the inner support ring (3). The ends of the middle inner spiral drum (1), the head inner spiral drum (5), and the tail inner spiral drum (9) are embedded in the inlay grooves (2). A head adapter ring (6) is arranged at the front end of the head inner spiral drum (5), and a head adapter ring (7) is arranged at the front end of the tail inner spiral drum (9). A tail adapter ring (10) is provided at the tail of the barrel, and the inner rings of the head adapter ring (6) and the tail adapter ring (10) are provided with inner connecting flanges, and a main screw (4) is provided between the inner connecting flanges of the head adapter ring (6) and the tail adapter ring (10); a head drive disk (7) is fixed to the inner ring of the head adapter ring (6) through the main screw (4), and a tail drive disk (11) is fixed to the inner ring of the tail adapter ring (10) through the main screw (4), and the inner drive shaft comprises a head drive shaft (14) and a tail drive shaft (17), wherein the head drive shaft (14) is vertically fixed to the head drive disk (7), and the tail drive shaft (17) is vertically fixed to the tail drive disk (11).

6. The homogenizing device for flame retardant PVC film raw materials as claimed in claim 5, characterized in that: The head feeding mechanism comprises a front end connecting ring, which is sealingly connected to the front end annular opening position of the outer support tube (46) and the outer mixing tube; the tail discharging mechanism comprises a tail connecting ring, which is sealingly connected to the rear end annular opening position of the outer support tube (46) and the outer mixing tube; the head feeding mechanism also comprises a head feeding ring (16), the outer ring of the head feeding ring (16) is in sealing contact with the inner ring of the front end connecting ring, the inner ring of the head feeding ring (16) is provided with a front end sealing groove, and the end of the head adapter ring (6) is in sliding sealing contact with the front end sealing groove; the tail discharging mechanism also comprises a tail discharging ring, the outer ring of the tail discharging ring is in sealing contact with the inner ring of the tail connecting ring, the inner ring of the tail discharging ring is provided with a tail sealing groove, and the end of the tail adapter ring (10) is in sliding sealing contact with the tail sealing groove.

7. The homogenizing device for flame retardant PVC film raw materials according to claim 6, characterized in that: The head feeding mechanism comprises a head feeding hopper (13) having an integral structure with the head feeding ring (16); the head feeding hopper (13) comprises a front end outer shell having an integral structure with the outer ring of the head feeding ring (16); a front end inner shell is fixed to the inner ring of the front end outer shell via a connecting rib (40); the front end inner shell and the inner ring of the head feeding ring (16) are an integral structure; a front end rotating sleeve is provided between the middle part of the front end inner shell and the middle part of the front end outer shell; a head driving shaft (14) is connected to the front end rotating sleeve. The tail discharge mechanism comprises a tail discharge hopper (18) which is an integral structure with the tail discharge ring, the tail discharge hopper (18) comprises a tail outer shell which is an integral structure with the outer ring of the tail discharge ring, a tail inner shell is fixed to the inner ring of the tail outer shell via a connecting rib (40), the tail inner shell and the inner ring of the tail discharge ring are an integral structure, a tail rotating sleeve is provided between the middle part of the tail inner shell and the middle part of the tail outer shell, and the tail drive shaft (17) is rotatably connected to the tail rotating sleeve.

8. The homogenizing device for flame retardant PVC film raw materials according to claim 7, characterized in that: A plurality of motor seats corresponding to each other are arranged in an annular array on the head feed ring (16) and the tail discharge ring, and the external rotary drive mechanism comprises an external drive motor (37) embedded in the motor seat, and the corresponding external drive motors (37) in the two groups of motor seats are fixed to the same external drive shaft (34).

9. A flame retardant PVC film raw material homogenizing device as claimed in claim 6, characterized in that: the front end The connecting ring and the tail connecting ring are connected to the end of the outer support tube (46) via a flange ring. The flange rings of the front connecting ring and the tail connecting ring are also connected to an end bracket. The end bracket comprises an inner support plate (42) and an outer support plate (43) stacked on each other. The outer sides of the inner support plate (42) and the outer support plate (43) are in contact with the ground. A support column is provided between the inner support plate (42) and the outer support plate (43). The inner support plate (42) is an annular structure. A middle rotating support seat (41) is provided in the middle of the outer support plate (43).

10. The homogenizing device for flame retardant PVC film raw materials according to claim 1, characterized in that: A plurality of driving gears (33) corresponding to the driving ring are arranged in a linear array on the outer driving shaft (34); the driving ring is a driving gear ring (31); and the driving gears (33) and the driving gear ring (31) are connected via a synchronous toothed belt transmission.

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