Polyvinyl chloride flame-retardant elastomer insulating material preparation equipment

Abstract

The invention provides polyvinyl chloride flame-retardant elastomer insulating material preparation equipment applied to the field of chemical production equipment, the polyvinyl chloride flame-retardant elastomer insulating material preparation equipment comprises a reaction tank and a heat preservation tank, the heat preservation tank is further provided with an auxiliary feed port, a main feed port and a discharge port, an outer stirring mechanism and an inner stirring mechanism are arranged in the reaction tank, and a reverse driving mechanism is further fixed to the top of the reaction tank; through the design of the outer stirring mechanism and the inner stirring mechanism, the stirring action in the reaction tank has a more uniform stirring flow direction, the stirring requirements of different volumes in the reaction tank can be met by utilizing the design that the inner stirring blades can move up and down, and meanwhile, by utilizing the up-down displacement of the inner stirring blades, the feeding and discharging dispersion actions of auxiliary materials are realized; the whole production efficiency is high, and the polyvinyl chloride and auxiliary material mixing device has a market prospect and is suitable for popularization and application.

Description

Technical Field

[0001] The present application relates to the field of chemical production equipment, and in particular to equipment for preparing polyvinyl chloride flame-retardant elastomer insulation materials. Background Art

[0002] In the wire and cable industry, flame-retardant polyvinyl chloride (PVC) elastomer insulation is crucial for ensuring safe power transmission. For example, in high-voltage cables, high dielectric strength is required to prevent leakage and short circuits. Furthermore, in wiring layouts within buildings, the material's flame retardancy can buy valuable time for evacuation in the event of a fire.

[0003] With the rapid development of intelligent electronic devices, the demand for miniaturized and high-performance insulation materials for internal circuits is increasing. Polyvinyl chloride flame-retardant elastomer insulation materials are highly favored due to their excellent overall performance, and market demand continues to grow.

[0004] When mixing various raw materials, existing equipment often fails to mix key ingredients such as polyvinyl chloride, flame retardants, and elastomers evenly due to limitations in stirring strength and methods.

[0005] In traditional equipment, the stirring paddle can only stir in a single plane, resulting in poor mixing effect of the material in the vertical direction, causing the insulation performance of different batches of materials to fluctuate by up to 10%-15%, and the flame retardant performance to fluctuate by about 5%-10%. Since the dispersion uniformity of the flame retardant in the material is the key factor affecting the flame retardant effect, traditional equipment lacks an effective dispersion mechanism, and the flame retardant particles are easy to agglomerate with each other, especially when the addition amount is large, the agglomeration phenomenon is more obvious, resulting in the flame retardant not being able to fully play its role, causing the flame retardant grade of the material to be reduced by 1-2 levels.

[0006] For this purpose, a preparation device for polyvinyl chloride flame retardant elastomer insulation material is proposed. Summary of the Invention

[0007] The purpose of the present application is to solve the problem that the existing polyvinyl chloride flame retardant elastomer insulation material preparation equipment has poor stirring effect, which affects the cable quality and production efficiency. Compared with the existing technology, a polyvinyl chloride flame retardant elastomer insulation material preparation equipment is provided, which includes a reaction tank and an insulation tank coated on the outside of the reaction tank, the outer wall of the reaction tank is fixed with a temperature control layer, the insulation tank is also provided with a secondary feed port, a main feed port and a discharge port, the main feed port and the discharge port are used for feeding and discharging the reaction tank, an external stirring mechanism and an internal stirring mechanism are provided in the reaction tank, the external stirring mechanism rotates in contact with the inner wall of the reaction tank, and the internal stirring mechanism rotates in the middle of the reaction tank, a stirring motor is fixed on the top of the insulation tank, the stirring motor is used to drive the external stirring mechanism and the internal stirring mechanism to rotate, and a reverse driving mechanism is also fixed on the top of the reaction tank, the reverse driving mechanism is used to make the external stirring mechanism and the internal stirring mechanism rotate in opposite directions; The bottom of the reverse drive mechanism is provided with a number of planetary gears arranged at equal angles, and the planetary gears are rotatably connected to the bottom of the reverse drive mechanism. The top of the external stirring mechanism is provided with an upper rotating seat, and the top of the upper rotating seat is provided with a ring gear meshing with the planetary gears. The internal stirring mechanism includes a sliding sleeve and an external drive tube, and the top of the external drive tube is fixed with a sun gear meshing with the planetary gears.

[0008] Furthermore, a bracket seat is fixed to the inner bottom of the reaction tank, a lower rotating seat rotatably connected to the bracket seat is fixed to the bottom of the external stirring mechanism, the bottom end of the external driving tube is rotatably connected to the top of the bracket seat, a stirring shaft is fixed to the output end of the stirring motor, and the top end of the external driving tube is fixedly connected to the stirring shaft.

[0009] Furthermore, the sliding sleeve is fixed with a plurality of inner stirring blades arranged at equal angles, a sliding rod is coaxially arranged on the inner side of the sliding sleeve, a plurality of limit blocks are fixed at equal angles between the sliding rod and the sliding sleeve, and the outer driving tube is provided with a limit groove corresponding to the limit block; An adjusting rod is coaxially arranged inside the sliding rod, and the adjusting rod is connected to the sliding sleeve in a time-sharing manner through a clutch ring.

[0010] Furthermore, the outer wall of the adjusting rod is provided with a spiral groove, the top of the sliding rod is provided with a nut seat that matches the spiral groove, and a return spring is clamped between the nut seat and the adjusting rod; The top of the adjusting rod is provided with a travel bin corresponding to the clutch ring, the top of the adjusting rod extends into the travel bin and is provided with a spline, the inner wall of the clutch ring is provided with a spline groove corresponding to the spline, the upper and lower sides of the travel bin are respectively provided with upper mating teeth and an iron ring, the upper mating teeth are fixed to the top of the travel bin, and the iron ring is rotatably connected to the bottom of the travel bin, a tensioning spring is clamped between the clutch ring and the iron ring, and the top of the clutch ring is provided with a lower mating tooth that cooperates with the upper mating tooth; Four groups of electromagnetic blocks arranged at equal angles are provided on the circumferential side of the clutch ring. Adjacent electromagnetic blocks have different magnetic properties when powered. Permanent magnets corresponding to the electromagnetic blocks are provided at the bottom of the upper rotating seat.

[0011] Furthermore, a discharge pipe is fixed to the bottom of the slide rod, a cavity is provided in the discharge pipe, a spiral blade is provided on the outer wall of the discharge pipe, the discharge port is equal to the inner diameter of the external drive pipe, and the outer diameter of the spiral blade is equal to the inner diameter of the external drive pipe.

[0012] Furthermore, a first channel is provided between the sliding sleeve and the sliding rod, and a plurality of equally spaced dispersion holes are provided on the inner stirring blade, and an output end of the first channel is connected to an input end of the dispersion holes; A piston is fixed to the bottom end of the adjusting rod, and the piston is in conflict with the inner wall of the sliding rod. A second channel is provided through the adjusting rod, and the output end of the second channel extends to the bottom of the piston and is provided with a first one-way valve. The input end of the first channel extends to the bottom of the sliding rod and is provided with a second one-way valve.

[0013] Furthermore, a feeding channel is provided at the bottom of the stirring shaft, and the output end of the feeding channel is rotatably connected to the input end of the second channel; A refinement mechanism is also provided between the top of the insulation tank and the reaction tank. The refinement mechanism is used to refine the auxiliary agent delivered by the auxiliary feed port. The input end of the feed channel is rotatably connected to a rotary joint. The rotary joint is fixed in the insulation tank. The rotary joint is connected to a conduit. The output end of the refinement mechanism is connected to the feed channel through the conduit and the rotary joint.

[0014] Furthermore, the refinement mechanism includes a lower bin body fixed on the insulation tank and an upper cover plate fixed on the stirring shaft, a refinement tooth plate is fixed on the side of the upper cover plate opposite to the lower bin body, and a collection bin is provided on the circumferential outer side of the upper cover plate.

[0015] Furthermore, the lower bin body is an L-shaped circular ring structure in cross section, and the output end of the auxiliary feed port extends to the top gap between the upper cover plate and the lower bin body.

[0016] Furthermore, the refined tooth plates on the upper cover and the lower bin body are trumpet-shaped structures with the openings facing upward, and the spacing between the two sets of refined tooth plates gradually decreases in the direction away from the axis of the stirring shaft. The lowest point of the collecting bin is lower than the highest point of the refined tooth plates, and one end of the conduit extends to the bottom of the collecting bin.

[0017] Compared with the existing technology, the advantages of this application are: The present invention realizes a more uniform stirring flow direction for the stirring action in the reaction tank through the design of the external stirring mechanism and the internal stirring mechanism. The design of the internal stirring blade that can be moved up and down is utilized to enable the stirring requirements of different volumes in the reaction tank to be met. At the same time, the up and down displacement of the internal stirring blade is utilized to realize the feeding and discharging dispersion actions of the auxiliary material, thereby improving the mixing uniformity of the polyvinyl chloride and the auxiliary material. The overall production efficiency is high, the market prospects are good, and it is suitable for promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the front structure of this application; Figure 2 This is a schematic diagram of the bottom structure of this application; Figure 3 This is a schematic diagram of the cross-sectional structure of this application; Figure 4 This is a schematic diagram of the internal structure of the reaction tank proposed in this application; Figure 5 Schematic diagram of the structure of the external stirring mechanism and the internal stirring mechanism proposed in this application; Figure 6 Schematic diagram of the explosion structure of the external stirring mechanism and the internal stirring mechanism proposed in this application; Figure 7 Schematic diagram of the bottom structure of the reverse drive mechanism proposed in this application; Figure 8 This is a schematic diagram of the explosion structure of the internal stirring mechanism proposed in this application; Figure 9 This is a schematic diagram of the explosion structure of the clutch ring and the adjustment rod proposed in this application; Figure 10 This is a schematic diagram of the top structure of the clutch ring proposed in this application; Figure 11 This is a schematic structural diagram of the internal stirring mechanism proposed in this application; Figure 12 This is a schematic diagram of the top structure of the sliding cylinder proposed in this application; Figure 13 for Figure 3 A schematic diagram of the enlarged structure of part A; Figure 14 for Figure 3 Schematic diagram of the enlarged structure of part B; Figure 15 This is a schematic diagram of the state when the inner stirring blade moves downward in this application; Figure 16 for Figure 15 Schematic diagram of the enlarged structure of the middle C part; Figure 17 This is a schematic diagram of the state when the inner stirring blade moves upward in this application; Figure 18This is a structural diagram of the inner stirring blade in this application when it moves down to the maximum stroke.

[0019] Description of the numbers in the figure: 1. Insulation tank; 101. Feed channel; 11. Stirring motor; 111. Stirring shaft; 112. Rotary joint; 12. Main feed port; 13. Auxiliary feed port; 14. Temperature sensor; 15. Discharge port; 151. Support; 2. Reactor; 3. Temperature control layer; 4. External stirring mechanism; 41. Lower rotating seat; 42. Upper rotating seat; 421. Ring gear; 422. Permanent magnet; 5. Internal stirring mechanism; 501. First channel; 502. Second channel; 503. First one-way valve; 504. Second one-way valve; 51. Sleeve; 52. External drive tube; 521. Sun gear; 522. Limiting groove; 523. Upper mating teeth; 524. Iron ring; 525. Stroke chamber; 53. Adjusting rod; 531. Piston; 532. Spiral groove; 533. Spline; 54. Sliding cylinder; 541. Nut seat; 55. Discharge pipe; 551. Spiral blade; 56. Inner stirring blade; 561. Dispersion hole; 57. Return spring; 58. Limit block; 6. Reverse drive mechanism; 61. Planetary gear; 7. Clutch ring; 71. Electromagnetic block; 72. Lower mating teeth; 73. Spline groove; 74. Tensioning spring; 8. Refining mechanism; 81. Upper cover plate; 82. Lower chamber body; 83. Refining tooth plate; 84. Collection chamber; 9. Conduit. DETAILED DESCRIPTION

[0020] The embodiments will be combined with the drawings in the specification to clearly and completely describe the technical solution of this application. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making any creative work shall fall within the scope of protection of this application. Example

[0021] The present invention provides a polyvinyl chloride flame retardant elastomer insulation material preparation equipment, please refer to Figure 1 - Figure 18 , including a reaction tank 2 and an insulation tank 1 wrapped around the outside of the reaction tank 2, a temperature control layer 3 is fixed to the outer wall of the reaction tank 2, and a temperature sensor 14 is also provided on the outer wall of the insulation tank 1 for detecting the temperature inside the reaction tank 2, wherein the reaction tank 2 is made of 316L stainless steel with a thickness of 7-10mm, thereby improving corrosion resistance and mechanical strength, and an aluminum silicate fiber felt insulation layer is filled between the insulation tank 1 and the temperature control layer 3, and the thickness of the insulation layer is 13-20cm, which effectively reduces heat loss and keeps the temperature uniformity inside the reaction tank 2 within ±1°C. Furthermore, a heating coil and a cooling coil are provided in the temperature control layer 3.

[0022] Furthermore, the heating coil is made of stainless steel seamless steel pipe with a diameter of 15-25 mm and is spirally wound around the inner wall of the kettle jacket with a spacing of 4-8 cm. The heating coil is heated by thermal oil at a temperature of 140-220°C, which increases the temperature of the material in the reactor 2 from room temperature to the reaction temperature within 25-45 minutes. The cooling coil is made of copper pipe with a diameter of 20-25 mm and is arranged in a staggered manner with the heating coil in the jacket. The cooling coil is fed with cooling water for rapid cooling at a cooling water flow rate of 8-14 m3 / h, which can reduce the temperature of the material from the reaction temperature to below 45°C within 10-30 minutes.

[0023] See also Figure 1 - Figure 3 The insulation tank 1 is also provided with an auxiliary feed port 13, a main feed port 12 and a discharge port 15, wherein the number of the auxiliary feed ports 13 is multiple, and the auxiliary feed ports 13 are individually connected to a storage bin through a flange structure. The storage bin is made of high-strength stainless steel and the interior is polished to reduce material residue. Furthermore, a high-precision screw conveyor is equipped at the bottom of each storage bin, and its pitch is adjusted according to the fluidity of the material to ensure the accuracy of the discharge of the auxiliary raw materials; The main feed port 12 and the discharge port 15 are used for feeding and discharging the reaction tank 2. The input ends of the main feed port 12 and the auxiliary feed port 13 are both provided with flow sensors, which are convenient for real-time and accurate measurement of the input weight of each raw material. The screw conveyor and the flow sensor are both connected to the control system, and the real-time measured data is transmitted to the control system for processing to ensure that the raw materials are accurately fed according to the preset ratio.

[0024] See also Figure 3 - Figure 5 , an external stirring mechanism 4 and an internal stirring mechanism 5 are provided in the reaction tank 2, the external stirring mechanism 4 rotates in contact with the inner wall of the reaction tank 2, the four groups of blades of the external stirring mechanism 4 are arranged in a spiral shape, and a flexible scraper is fixed on one side of the blades of the external stirring mechanism 4 close to the inner wall of the reaction tank 2, the internal stirring mechanism 5 rotates in the middle of the reaction tank 2, the diameter of the internal stirring mechanism 5 is 0.2 times the diameter of the reaction tank 2, the internal stirring mechanism 5 provides radial and axial flow driving force for the material in the reaction tank 2, and the external stirring mechanism 4 provides vertical mixed flow driving force for the material in the reaction tank 2, a stirring motor 11 is fixed on the top of the insulation tank 1, the stirring motor 11 is used to drive the external stirring mechanism 4 and the internal stirring mechanism 5 to rotate, and a reverse drive mechanism 6 is also fixed on the top of the reaction tank 2, and the reverse drive mechanism 6 is used to make the external stirring mechanism 4 and the internal stirring mechanism 5 rotate in opposite directions; See also Figure 6 - Figure 7, the bottom of the reverse drive mechanism 6 is provided with several planetary gears 61 arranged at equal angles, and the planetary gears 61 are rotatably connected to the bottom of the reverse drive mechanism 6, the top of the external stirring mechanism 4 is provided with an upper rotating seat 42, and the top of the upper rotating seat 42 is provided with a ring gear 421 meshing with the planetary gears 61, the internal stirring mechanism 5 includes a sleeve 51 and an external driving tube 52, and the top of the external driving tube 52 is fixed with a sun gear 521 meshing with the planetary gears 61, the inner bottom of the reaction tank 2 is fixed with a bracket seat 151, the bottom of the external stirring mechanism 4 is fixed with a lower rotating seat 41 rotatably connected to the bracket seat 151, the bottom end of the external driving tube 52 is rotatably connected to the top of the bracket seat 151, the output end of the stirring motor 11 is fixed with a stirring shaft 111, and the top of the external driving tube 52 is fixedly connected to the stirring shaft 111.

[0025] A three-stage planetary gear set is formed by the cooperation among the planetary gear 61, the sun gear 521 and the ring gear 421. When the stirring shaft 111 drives the outer driving tube 52 to rotate, the sun gear 521 is used to drive the planetary gear 61 to rotate, and then the planetary gear 61 is used to drive the ring gear 421 to rotate, thereby achieving the effect that the outer stirring mechanism 4 and the inner stirring mechanism 5 rotate in opposite directions and at different speeds, which can further improve the mixing effect of the materials in the reaction tank 2, and can be optimized and adjusted according to the matching characteristics and production processes of different polyvinyl chloride flame retardant elastomer insulation materials to improve the mixing efficiency.

[0026] For further information, see Figure 8 - Figure 14 A plurality of inner stirring blades 56 are fixed on the sliding sleeve 51 and are evenly spaced at equal angles. A sliding cylinder 54 is coaxially arranged on the inner side of the sliding sleeve 51. A plurality of limit blocks 58 are fixed between the sliding cylinder 54 and the sliding sleeve 51 and are evenly spaced at equal angles. A limit groove 522 corresponding to the limit block 58 is provided on the outer driving tube 52. An adjusting rod 53 is coaxially arranged in the sliding cylinder 54. The adjusting rod 53 is connected to the sliding sleeve 51 in a time-sharing manner through the clutch ring 7. A spiral groove 532 is provided on the outer wall of the adjusting rod 53. A nut seat 541 that matches the spiral groove 532 is provided on the top of the sliding cylinder 54. A return spring 57 is clamped between the nut seat 541 and the adjusting rod 53. A travel chamber 525 corresponding to the clutch ring 7 is provided on the top of the adjusting rod 53. The top of the adjusting rod 53 extends into the travel chamber 525 and A spline 533 is provided, and a spline groove 73 corresponding to the spline 533 is provided on the inner wall of the clutch ring 7. Upper mating teeth 523 and an iron ring 524 are provided on the upper and lower sides of the travel chamber 525, respectively. The upper mating teeth 523 are fixed to the top of the travel chamber 525, and the iron ring 524 is rotatably connected to the bottom of the travel chamber 525. A tensioning spring 74 is clamped between the clutch ring 7 and the iron ring 524. A lower mating tooth 72 that cooperates with the upper mating tooth 523 is provided on the top of the clutch ring 7. Four groups of electromagnetic blocks 71 arranged at equal angles are provided on the circumferential side of the clutch ring 7. The adjacent electromagnetic blocks 71 have different magnetic properties when powered. The electromagnetic blocks 71 are powered through conductive slip rings. Permanent magnets 422 corresponding to the electromagnetic blocks 71 are provided at the bottom of the upper rotating seat 42. A distance sensor for monitoring the height of the sliding cylinder 54 is also provided in the outer drive tube 52.

[0027] In this embodiment, the overall height of the internal stirring mechanism 5 can be adjusted according to the depth of the material in the reaction tank 2, so as to achieve more efficient stirring efficiency. Specifically, when the sliding sleeve 51 and the internal stirring blade 56 are at a non-design height, the electromagnetic block 71 is energized and generates a magnetic attraction to the iron ring 524. The clutch ring 7 uses the magnetic attraction of the electromagnetic block 71 to overcome the elasticity of the tensioning spring 74 and move downward, so that the lower mating teeth 72 are separated from the upper mating teeth 523. At this time, the clutch ring 7 and the outer drive tube 52 are in an unlocked state. Since the clutch ring 7 and the adjusting rod 53 are restricted by the spline 533, the adjusting rod 53 can automatically move relative to the sliding cylinder 54. By rotation, on the other hand, the electromagnetic block 71 is attracted to the permanent magnet 422 of the external stirring mechanism 4 under the condition of power-on, so that the adjusting rod 53 rotates along with the external stirring mechanism 4. Under the condition that the rotation directions of the external stirring mechanism 4 and the slide cylinder 54 are opposite, the nut seat 541 cooperates with the spiral groove 532 on the outer wall of the adjusting rod 53, and the rotation of the adjusting rod 53 relative to the slide cylinder 54 drives the slide cylinder 54 and the sliding sleeve 51, and the inner stirring blade 56 to move up and down, thereby implementing the adjustment of the stirring position of the inner stirring blade 56 in the reaction tank 2, wherein the up and down displacement direction of the inner stirring blade 56 depends on the rotation direction of the stirring motor 11.

[0028] When the sleeve 51 and the inner stirring blade 56 are at the designed height, the electromagnetic block 71 is not energized. At this time, the clutch ring 7 as a whole moves upward under the elastic force of the tensioning spring 74, so that the lower engaging teeth 72 are engaged with the upper engaging teeth 523 in the outer drive tube 52. At this time, the clutch ring 7 is locked with the outer drive tube 52, and the rotation of the outer drive tube 52 drives the clutch ring 7 to rotate synchronously. At the same time, since the clutch ring 7 and the adjusting rod 53 are restricted by the spline 533, the synchronous rotation of the outer drive tube 52, the adjusting rod 53 and the sliding cylinder 54 can be achieved. At this time, the spiral groove 532 on the adjusting rod 53 can limit the height position of the nut seat 541 on the sliding cylinder 54, thereby achieving height restriction of the sliding cylinder 54, the sleeve 51 and the inner stirring blade 56, and thereby achieving the fixed position of the inner stirring blade 56 at the designed stirring height.

[0029] For further information, see Figure 8 and Figure 18A discharge pipe 55 is also fixed to the bottom of the sliding cylinder 54. A cavity is provided in the discharge pipe 55. A spiral blade 551 is provided on the outer wall of the discharge pipe 55. The spiral direction of the spiral blade 551 is opposite to the spiral direction of the blade of the external stirring mechanism 4. The discharge port 15 is equal to the inner diameter of the external drive tube 52, and the outer diameter of the spiral blade 551 is equal to the inner diameter of the external drive tube 52.

[0030] After the stirring and mixing of the reaction tank 2 is completed, when the discharge operation of the discharge port 15 is carried out, the sliding cylinder 54 can be moved down to the lowest point by means of the cooperation of the clutch ring 7 and the adjusting rod 53. At this time, the discharge pipe 55 is engaged in the bracket seat 151, and the reverse rotation of the external stirring mechanism 4 and the internal stirring mechanism 5 is used to drive. On the one hand, the blades of the external stirring mechanism 4 are used to scrape off the residual materials on the inner wall of the reaction tank 2, and the spiral structure of the blades of the external stirring mechanism 4 is used to push them to the discharge port 15. On the other hand, the downward movement of the sliding sleeve 51 and the discharge pipe 55 is used to scrape off the residual materials in the limit groove 522 and the residual materials inside the external drive pipe 52, and the spiral structure of the dispersion hole 561 is used to push them to the discharge port 15, thereby effectively improving the self-cleaning ability of the interior of the reaction tank 2, effectively reducing the residual amount of viscous materials in the reaction tank 2, and the discharge of the discharge port 15 is not easy to be blocked, with efficient continuous production.

[0031] See also Figure 13 A first channel 501 is further provided between the sliding sleeve 51 and the sliding cylinder 54. A plurality of equally spaced dispersion holes 561 are provided on the inner stirring blade 56. The output end of the first channel 501 is connected to the input end of the dispersion holes 561. The auxiliary material delivered from the auxiliary feed port 13 can be dispersed into the polyvinyl chloride in the reaction tank 2 through the rotating inner stirring blade 56 and the dispersion holes 561 during the stirring process through the first channel 501, so that the auxiliary material can be evenly dispersed in the polyvinyl chloride. See also Figure 13 In order to facilitate the supply of auxiliary materials into the first channel 501, a piston 531 is fixed to the bottom end of the adjusting rod 53, and the piston 531 conflicts with the inner wall of the sliding cylinder 54. A second channel 502 is provided through the adjusting rod 53, and the output end of the second channel 502 extends to the bottom of the piston 531 and is provided with a first one-way valve 503. The input end of the first channel 501 extends to the bottom of the sliding cylinder 54 and is provided with a second one-way valve 504, wherein the second one-way valve 504 has a one-way conductivity to prevent the material in the first channel 501 from flowing back into the adjusting rod 53, and the first one-way valve 503 has a one-way conductivity to prevent the material in the adjusting rod 53 from entering the second channel 502.

[0032] A feeding channel 101 is provided at the bottom of the stirring shaft 111, and the output end of the feeding channel 101 is rotatably connected to the input end of the second channel 502; a refinement mechanism 8 is also provided between the top of the insulation tank 1 and the reaction tank 2, and the refinement mechanism 8 is used to refine the auxiliary agent delivered by the auxiliary feed port 13. The input end of the feeding channel 101 is rotatably connected to a rotary joint 112, and the rotary joint 112 is fixed in the insulation tank 1. The rotary joint 112 is connected to a conduit 9, and the output end of the refinement mechanism 8 is connected to the feeding channel 101 through the conduit 9 and the rotary joint 112.

[0033] When the slide cylinder 54 is driven to move downward by the adjusting rod 53, the slide cylinder 54 moves downward away from the piston 531 as a whole, so that the cavity between the slide cylinder 54 and the piston 531 generates negative pressure, and cooperates with the conduit 9 to adsorb the auxiliary material from the refining mechanism 8 and store it in the cylinder body of the slide cylinder 54. When the slide cylinder 54 moves upward by the adjusting rod 53, or automatically moves upward by the elastic force of the return spring 57 and the buoyancy of the discharge pipe 55, the slide cylinder 54 moves upward close to the piston 531 as a whole, and then uses the squeezing force of the piston 531 on the cylinder body of the slide cylinder 54 to discharge the auxiliary material stored in the slide cylinder 54 into the first channel 501, and cooperates with the dispersion hole 561 for dispersion. In this process, the internal stirring blade 56 has a bottom-up displacement, which further improves the dispersion uniformity of the auxiliary material and prevents the granular auxiliary agent from agglomerating.

[0034] See also Figure 15 - Figure 16 The refining mechanism 8 includes a lower bin body 82 fixed on the insulation tank 1 and an upper cover plate 81 fixed on the stirring shaft 111. Refining tooth plates 83 are fixed on the side opposite to the lower bin body 82 of the upper cover plate 81. A collecting bin 84 is provided on the outer side of the circumference of the upper cover plate 81. The lower bin body 82 has an L-shaped ring structure in cross section. The output end of the auxiliary feed port 13 extends to the top gap between the upper cover plate 81 and the lower bin body 82.

[0035] Among them, the fine tooth plates 83 on the upper cover plate 81 and the lower bin body 82 are trumpet-shaped structures with the opening facing upward. In order to facilitate the entry of the auxiliary material between the two sets of fine tooth plates 83, the spacing between the two sets of fine tooth plates 83 gradually decreases in the direction away from the axis of the stirring shaft 111. The lowest point of the collecting bin 84 is lower than the highest point of the fine tooth plates 83, and one end of the conduit 9 extends to the bottom of the collecting bin 84.

[0036] When the stirring shaft 111 rotates, it drives the upper cover plate 81 to rotate as a whole, and the two sets of refining tooth plates 83 are relatively displaced. The auxiliary material is fed into the space between the upper cover plate 81 and the lower bin body 82 through the auxiliary feed port 13, and is displaced toward the collecting bin 84 by the centrifugal force generated by the rotation of the lower bin body 82. During the displacement process, the auxiliary material is refined between the two sets of refining tooth plates 83, further improving the dispersion uniformity of the auxiliary material in the polyvinyl chloride.

[0037] The present invention realizes a more uniform stirring flow direction in the stirring action of the reaction tank 2 through the design of the external stirring mechanism 4 and the internal stirring mechanism 5. The design of the internal stirring blade 56 that can be moved up and down enables the stirring requirements of different volumes in the reaction tank 2 to be met. At the same time, the up and down displacement of the internal stirring blade 56 is utilized to realize the feeding and discharging dispersion actions of the auxiliary material, thereby improving the mixing uniformity of the polyvinyl chloride and the auxiliary material. The overall production efficiency is high, the market prospects are good, and it is suitable for promotion and application.

[0038] The above is only the best implementation method adopted by this application in combination with current actual needs, but the scope of protection of this application is not limited to this.

Claims

1. A polyvinyl chloride flame retardant elastomer insulation material preparation device, comprising a reaction tank (2) and a heat preservation tank (1) coated on the outside of the reaction tank (2), wherein the outer wall of the reaction tank (2) is fixed with a temperature control layer (3), and the heat preservation tank (1) is further provided with a secondary feed port (13), a main feed port (12) and a discharge port (15), wherein the main feed port (12) and the discharge port (15) are used for feeding and discharging the reaction tank (2), and the device is characterized in that: An external stirring mechanism (4) and an internal stirring mechanism (5) are provided in the reaction tank (2); the external stirring mechanism (4) rotates in contact with the inner wall of the reaction tank (2); the internal stirring mechanism (5) rotates in the middle of the reaction tank (2); a stirring motor (11) is fixed on the top of the heat-insulating tank (1); the stirring motor (11) is used to drive the external stirring mechanism (4) and the internal stirring mechanism (5) to rotate; a reverse driving mechanism (6) is also fixed on the top of the reaction tank (2); the reverse driving mechanism (6) is used to make the external stirring mechanism (4) and the internal stirring mechanism (5) rotate in opposite directions; The bottom of the reverse drive mechanism (6) is provided with a plurality of planetary gears (61) arranged at equal angles, and the planetary gears (61) are rotatably connected to the bottom of the reverse drive mechanism (6). The top of the external stirring mechanism (4) is provided with an upper rotating seat (42), and the top of the upper rotating seat (42) is provided with a gear ring (421) meshing with the planetary gears (61). The internal stirring mechanism (5) includes a sliding sleeve (51) and an external driving tube (52), and the top of the external driving tube (52) is fixed with a sun gear (521) meshing with the planetary gears (61).

2. The equipment for preparing polyvinyl chloride flame retardant elastomer insulation material according to claim 1, characterized in that: A support seat (151) is fixed to the inner bottom of the reaction tank (2), a lower rotating seat (41) rotatably connected to the support seat (151) is fixed to the bottom of the external stirring mechanism (4), the bottom end of the external driving tube (52) is rotatably connected to the top of the support seat (151), a stirring shaft (111) is fixed to the output end of the stirring motor (11), and the top end of the external driving tube (52) is fixedly connected to the stirring shaft (111).

3. The equipment for preparing polyvinyl chloride flame retardant elastomer insulation material according to claim 2, characterized in that: A plurality of inner stirring blades (56) arranged at equal angles are fixed on the sliding sleeve (51), a sliding rod (54) is coaxially arranged on the inner side of the sliding sleeve (51), a plurality of limit blocks (58) are fixed at equal angles between the sliding rod (54) and the sliding sleeve (51), and a limit groove (522) corresponding to the limit block (58) is provided on the outer driving tube (52); An adjusting rod (53) is coaxially arranged inside the sliding rod (54), and the adjusting rod (53) is connected to the sliding sleeve (51) in a time-sharing manner via a clutch ring (7).

4. The equipment for preparing polyvinyl chloride flame retardant elastomer insulation material according to claim 3, characterized in that: The outer wall of the adjusting rod (53) is provided with a spiral groove (532), the top of the sliding rod (54) is provided with a nut seat (541) that matches the spiral groove (532), and a return spring (57) is clamped between the nut seat (541) and the adjusting rod (53); The top of the regulating rod (53) is provided with a travel bin (525) corresponding to the clutch ring (7), the top of the regulating rod (53) extends into the travel bin (525) and is provided with a spline (533), the inner wall of the clutch ring (7) is provided with a spline groove (73) corresponding to the spline (533), the upper and lower sides of the travel bin (525) are respectively provided with an upper mating tooth (523) and an iron ring (524), the upper mating tooth (523) is fixed to the top of the travel bin (525), and the iron ring (524) is rotatably connected to the bottom of the travel bin (525), a tensioning spring (74) is clamped between the clutch ring (7) and the iron ring (524), and the top of the clutch ring (7) is provided with a lower mating tooth (72) that matches the upper mating tooth (523); Four groups of electromagnetic blocks (71) arranged at equal angles are provided on the circumferential side of the clutch ring (7), and adjacent electromagnetic blocks (71) have different magnetic properties when energized. The bottom of the upper rotating seat (42) is provided with permanent magnets (422) corresponding to the electromagnetic blocks (71) one by one.

5. The equipment for preparing polyvinyl chloride flame retardant elastomer insulation material according to claim 4, characterized in that: A discharge pipe (55) is also fixed to the bottom of the slide bar (54), wherein a cavity is provided in the discharge pipe (55), and a spiral blade (551) is provided on the outer wall of the discharge pipe (55). The inner diameter of the discharge port (15) is equal to that of the outer drive pipe (52), and the outer diameter of the spiral blade (551) is equal to the inner diameter of the outer drive pipe (52).

6. The equipment for preparing polyvinyl chloride flame retardant elastomer insulation material according to claim 5, characterized in that: A first channel (501) is further provided between the sliding sleeve (51) and the sliding rod (54), and a plurality of equally spaced dispersion holes (561) are provided on the inner stirring blade (56), and the output end of the first channel (501) is connected to the input end of the dispersion hole (561); A piston (531) is fixed to the bottom end of the regulating rod (53), and the piston (531) is in conflict with the inner wall of the sliding rod (54). A second channel (502) is provided through the regulating rod (53), and the output end of the second channel (502) extends to the bottom of the piston (531) and is provided with a first one-way valve (503). The input end of the first channel (501) extends to the bottom of the sliding rod (54) and is provided with a second one-way valve (504).

7. The equipment for preparing polyvinyl chloride flame retardant elastomer insulation material according to claim 6, characterized in that: A feeding channel (101) is provided at the bottom of the stirring shaft (111), and an output end of the feeding channel (101) is rotatably connected to an input end of the second channel (502); A refinement mechanism (8) is further provided between the top of the heat preservation tank (1) and the reaction tank (2). The refinement mechanism (8) is used to refine the auxiliary agent delivered by the auxiliary feed port (13). The input end of the feed channel (101) is rotatably connected to a rotary joint (112). The rotary joint (112) is fixed in the heat preservation tank (1). The rotary joint (112) is connected to a conduit (9). The output end of the refinement mechanism (8) is connected to the feed channel (101) via the conduit (9) and the rotary joint (112).

8. The equipment for preparing polyvinyl chloride flame retardant elastomer insulation material according to claim 7, characterized in that: The refinement mechanism (8) comprises a lower bin body (82) fixed on the heat-insulating tank (1) and an upper cover plate (81) fixed on the stirring shaft (111), a refinement tooth plate (83) being fixed on one side of the upper cover plate (81) opposite to the lower bin body (82), and a collection bin (84) being provided on the outer circumference of the upper cover plate (81).

9. The equipment for preparing polyvinyl chloride flame retardant elastomer insulation material according to claim 8, characterized in that: The lower bin body (82) is an L-shaped circular ring structure in cross section, and the output end of the auxiliary feed port (13) extends to the top gap between the upper cover plate (81) and the lower bin body (82).

10. The equipment for preparing polyvinyl chloride flame retardant elastomer insulation material according to claim 8, characterized in that: The fine tooth plates (83) on the upper cover plate (81) and the lower bin body (82) are trumpet-shaped structures with openings facing upwards, and the spacing between the two sets of fine tooth plates (83) gradually decreases in a direction away from the axis of the stirring shaft (111). The lowest point of the collecting bin (84) is lower than the highest point of the fine tooth plates (83), and one end of the conduit (9) extends to the bottom of the collecting bin (84).

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