A PVC polymerization kettle wall coating device with easy discharging

Abstract

The present invention relates to the field of polymerization kettle wall coating equipment, and particularly to a PVC polymerization kettle wall coating device that is easy to discharge materials. A PVC polymerization kettle wall coating device described herein includes a main support and an annular soft sheet, etc.; the main support is connected to the annular soft sheet. In a PVC polymerization kettle wall coating device described herein, a bead pressing assembly presses the outer edge of the annular soft sheet to facilitate the normal operation of the rotary slag scraping mechanism. Subsequently, the bead pressing assembly leaves the annular soft sheet, and the annular soft sheet expands outwards. The annular soft sheet collects the anti-sticking agent ejected from the annular pipe in a ring-shaped storage structure, and the anti-sticking agent is evenly coated on the inner wall of the kettle in an overflow manner. It solves the technical problems that the anti-sticking agent remaining on the nozzle of the spraying mechanism is prone to form coagulation blocks, resulting in uneven wall coating during the next wall coating operation, and the conventional method of scraping residues on the inner wall of the polymerization kettle is prone to cause wear on the inner wall of the polymerization kettle, affecting the service life of the polymerization kettle.

Description

Technical Field

[0001] The present invention relates to the field of polymerization kettle wall coating equipment, and in particular to a PVC polymerization kettle wall coating device that is easy to discharge materials. Background Art

[0002] During the operation of a PVC polymerization kettle, the coating on the inner wall of the polymerization kettle can provide a good production environment for the treatment liquid, and can also prevent a large amount of wall sticking on the inner wall of the polymerization kettle, improving the production efficiency of the treatment liquid. After the polymerization kettle has been operating for a long time, the coating on the inner wall of the polymerization kettle will be severely damaged, and it is necessary to perform wall coating treatment on the inner wall of the polymerization kettle by regularly spraying an anti-sticking agent.

[0003] In the prior art during the wall coating process of the polymerization kettle, an annular pipe preset at the inner top of the polymerization kettle is often used to directly spray the atomized anti-sticking agent on the inner wall of the polymerization kettle to achieve rapid wall coating work, effectively eliminating the need to disassemble the polymerization kettle for wall coating work. However, when directly performing wall coating work on the inner wall of the polymerization kettle, the following technical problems exist:

[0004] The spraying mechanism performs wall coating work regularly. After each cycle of wall coating work is completed, the anti-sticking agent remaining on the nozzles of the spraying mechanism is likely to form condensation blocks, causing different blockages to each nozzle, resulting in different fluid doses ejected by different nozzles during the next wall coating work, leading to uneven wall coating. During the inner wall flushing work of the polymerization kettle in the early stage of wall coating, directly spraying the cleaning liquid and using a scraper to scrape the residue on the inner wall of the polymerization kettle can not only not effectively scrape the tiny residue on the inner wall of the polymerization kettle, but also easily cause wear to the inner wall of the polymerization kettle, affecting the service life of the polymerization kettle. Summary of the Invention

[0005] In order to overcome the disadvantages that the anti-sticking agent remaining on the nozzles of the spraying mechanism is likely to form condensation blocks, resulting in uneven wall coating during the next wall coating work, and the conventional method of scraping the residue on the inner wall of the polymerization kettle is likely to cause wear to the inner wall of the polymerization kettle, affecting the service life of the polymerization kettle, the present invention provides a PVC polymerization kettle wall coating device that is easy to discharge materials.

[0006] A PVC polymerization kettle wall coating device with easy discharging described in this text includes a main support, a kettle body, a fixing ring, an annular pipe and an annular soft sheet; a kettle body is installed inside the main support; a drain valve is connected to the lower side of the kettle body; several fixing frames are fixedly connected to the upper side of the main support; a lifting cylinder is fixedly connected to each fixing frame; the telescopic ends of all the lifting cylinders penetrate through the kettle body; a fixing ring is fixedly connected among the telescopic ends of all the lifting cylinders; an annular pipe is fixedly connected to the outer edge of the fixing ring; the interior of the annular pipe is divided into an upper area and a lower area by a partition sheet; several upper nozzles are connected around the upper area of the annular pipe; several lower nozzles are connected around the lower area of the annular pipe; an annular soft sheet is fixedly connected to the lower side of the fixing ring; several elastic sheets are fixedly connected between the annular pipe and the annular soft sheet; a side support is fixedly connected between the main support and the right side of the kettle body; a partition conveying mechanism is connected to the right side of the annular pipe; the upper side of the partition conveying mechanism penetrates through the pipe kettle body; the partition conveying mechanism is connected to the side support; the partition conveying mechanism is connected to the fixing ring; a pressing edge component is connected to the lower side of the fixing ring; a rotary slag scraping mechanism is connected to the fixing ring; when the pressing edge component presses the outer edge of the annular soft sheet, the annular soft sheet bends and shrinks to generate deformation, facilitating the normal operation of the rotary slag scraping mechanism; when the pressing edge component leaves the annular soft sheet, the annular soft sheet expands outwards to work for wall coating in an overflow manner.

[0007] Preferably, the partition sheet is arranged in a structure with the middle arched upwards.

[0008] Preferably, each lower nozzle is arranged in a flat nozzle structure with a wide horizontal width and a narrow vertical width.

[0009] Preferably, the partition conveying mechanism includes a connecting pipe, a conduit, a telescopic pipe and a flow dividing component;

[0010] A connecting pipe is fixedly connected to the right side of the fixing ring; the connecting pipe is connected to the annular pipe; a conduit is connected to the upper side of the connecting pipe; the upper side of the conduit penetrates through the kettle body; the upper side of the conduit is fixedly connected to the side support; the middle part of the conduit is arranged in a telescopic pipe structure; a flow dividing component for distributing and introducing the fluid into the upper area and the lower area of the annular pipe is connected inside the connecting pipe.

[0011] Preferably, the flow dividing component includes a flow dividing valve, a motor and a rotating shaft;

[0012] A flow dividing valve is rotatably connected to the inner right end of the connecting pipe; a flow dividing groove structure penetrating left and right is arranged on the upper side of the flow dividing valve; a motor is fixedly connected to the left side of the connecting pipe; a rotating shaft is rotatably connected to the interior of the connecting pipe; the output shaft of the motor is fixedly connected to the rotating shaft.

[0013] Preferably, the pressing edge component includes a vertical electric push rod, a connecting plate and an annular push rod;

[0014] A number of vertical electric push rods are fixedly connected equidistantly around the fixed ring; a connecting plate is fixedly connected to the telescopic end of each vertical electric push rod; an annular push rod is fixedly connected between the outer ends of all the connecting plates; all the annular push rods are closely attached to the outer edge of the annular soft sheet.

[0015] Preferably, the rotary slag scraping mechanism includes an annular slider, a toothed ring, a driving motor, a sleeve shaft, a spline shaft, a spur gear and a scraping component;

[0016] An annular slider is slidably connected to the upper side of the fixed ring; a toothed ring is fixedly connected to the annular slider; a driving motor is fixedly connected to the side bracket; a sleeve shaft is rotatably connected between the side bracket and the kettle body; the output shaft of the driving motor is fixedly connected to the sleeve shaft; a spline shaft is connected inside the sleeve shaft; the lower side of the spline shaft is rotatably connected to the fixed ring; a spur gear is fixedly connected to the lower end of the spline shaft; the spur gear meshes with the toothed ring; a number of scraping components are arranged around the annular slider.

[0017] Preferably, the scraping component includes a fixing plate, a single slider, a horizontal electric push rod and a scraping plate;

[0018] A fixing plate is fixedly connected to the upper side of the annular slider; a single slider is slidably connected to the outer end of the fixing plate; a horizontal electric push rod is fixedly connected to the upper side of the fixing plate; the telescopic end of the horizontal electric push rod is fixedly connected to the single slider; a scraping plate is fixedly connected to the outer end of the single slider.

[0019] Preferably, the lower end of each scraping plate is arranged in an arc structure that slopes away from the kettle body from top to bottom.

[0020] Preferably, a liquid storage tank structure is formed on the upper surface of each scraping plate near the kettle body.

[0021] Beneficial effects: A wall coating device for a PVC polymerization kettle that is easy to discharge materials described in this article. An annular pipe for spraying anti-sticking agent is fixedly connected to the fixed ring. An annular soft sheet is arranged below the annular pipe. A number of elastic sheets are fixedly connected between the annular pipe and the annular soft sheet. A rotary slag scraping mechanism is connected to the fixed ring;

[0022] When the edge pressing component presses the outer edge of the annular soft sheet, the annular soft sheet bends and contracts to generate deformation, which facilitates the normal operation of the rotary slag scraping mechanism. The rotary slag scraping mechanism collects part of the spraying liquid together, soaks the residue on the inner wall of the kettle body and slowly performs the scraping work. On the basis of reducing the damage to the inner wall of the kettle body, the scraping efficiency of fine residues is improved; when the edge pressing component leaves the annular soft sheet, the annular soft sheet expands outwards, and the annular soft sheet collects the anti-sticking agent sprayed by the annular pipe in a ring-shaped storage structure, and the anti-sticking agent is evenly coated on the inner wall of the kettle body in an overflow manner;

[0023] Through the above processing steps, the technical problems that the anti-sticking agent remaining on the nozzle of the spraying mechanism is likely to form condensate blocks, resulting in uneven wall coating during the next wall coating operation, and that the conventional method of scraping the residue on the inner wall of the polymerization kettle is likely to cause wear on the inner wall of the polymerization kettle and affect the service life of the polymerization kettle are solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 FIG. [X] is a schematic three-dimensional structure diagram of the present application described according to an embodiment;

[0025] Figure 2 FIG. [X] is a schematic partial three-dimensional structure diagram of the present application described according to an embodiment;

[0026] Figure 3 FIG. [X] is a schematic three-dimensional structure diagram of the flow splitting component and the annular pipe of the present application described according to an embodiment;

[0027] Figure 4 FIG. [X] is a schematic three-dimensional structure diagram of the rotary slag scraping mechanism and the annular pipe of the present application described according to an embodiment;

[0028] Figure 5 FIG. [X] is a schematic three-dimensional structure diagram of the edge pressing component and the annular pipe of the present application described according to an embodiment;

[0029] Figure 6 FIG. [X] is a schematic three-dimensional structure diagram of the annular soft sheet and the annular pipe of the present application described according to an embodiment;

[0030] Figure 7 FIG. [X] is an exploded view of the annular pipe, the annular soft sheet and the flow splitting component of the present application described according to an embodiment;

[0031] Figure 8 FIG. [X] is a schematic partial three-dimensional structure diagram of the flow splitting component and the annular pipe of the present application described according to an embodiment;

[0032] Figure 9 FIG. [X] is a sectional view of the annular pipe of the present application described according to an embodiment;

[0033] Figure 10 FIG. [X] is a sectional view of the connecting pipe of the present application described according to an embodiment;

[0034] Figure 11 FIG. [X] is a schematic three-dimensional structure diagram of the scraping component of the present application described according to an embodiment;

[0035] Figure 12 FIG. [X] is a schematic three-dimensional structure diagram of the scraping plate of the present application described according to an embodiment.

[0036] In the figure: 1 - main support, 11 - fixing frame, 12 - lifting cylinder, 13 - side support, 2 - kettle body, 21 - drain valve, 3 - fixing ring, 4 - annular pipe, 41 - partition piece, 42 - upper nozzle, 43 - lower nozzle, 51 - connecting pipe, 52 - conduit, 521 - telescopic pipe, 53 - flow dividing valve, 531 - flow dividing groove, 54 - motor, 55 - rotating shaft, 6 - annular flexible sheet, 61 - elastic sheet, 71 - vertical electric push rod, 72 - connecting plate, 73 - annular push rod, 81 - annular slider, 82 - toothed ring, 83 - drive motor, 84 - sleeve shaft, 85 - spline shaft, 86 - spur gear, 91 - fixing plate, 92 - single slider, 93 - horizontal electric push rod, 94 - scraper, 941 - liquid storage tank. Detailed implementation mode

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0038] Embodiment

[0039] A wall coating device for a polyvinyl chloride polymerization kettle that is easy to discharge materials, as Figures 1 - 12As shown in the figure, it includes a main support 1, a kettle body 2, a fixing ring 3, an annular pipe 4, an annular soft sheet 6, a partition conveying mechanism, a bead pressing assembly and a rotary slag scraping mechanism; the kettle body 2 is installed inside the main support 1; a drain valve 21 is connected to the lower side of the kettle body 2; a plurality of fixing brackets 11 are bolted to the upper side of the main support 1; a lifting cylinder 12 is bolted to each fixing bracket 11; the telescopic ends of all the lifting cylinders 12 penetrate through the kettle body 2; a fixing ring 3 is fixedly connected between the telescopic ends of all the lifting cylinders 12; an annular pipe 4 is fixedly connected to the outer edge of the fixing ring 3; a partition sheet 41 is fixedly connected inside the annular pipe 4; a plurality of upper nozzles 42 are connected to the area above the partition sheet 41 around the annular pipe 4; a plurality of lower nozzles 43 are connected to the area below the partition sheet 41 around the annular pipe 4; the partition sheet 41 is arranged in a structure with the middle arched upward; each lower nozzle 43 is arranged in a flat nozzle structure with a wide horizontal width and a narrow vertical width; an annular soft sheet 6 is fixedly connected to the lower side of the fixing ring 3; the middle of the annular soft sheet 6 is arranged in a structure with a downward bulge, and the middle of the annular soft sheet 6 is closely attached to the annular pipe 4; a plurality of elastic sheets 61 are fixedly connected between the annular pipe 4 and the annular soft sheet 6; a side support 13 is bolted together between the main support 1 and the right side of the kettle body 2; a partition conveying mechanism is connected to the right side of the annular pipe 4; the upper side of the partition conveying mechanism penetrates through the kettle body 2; the partition conveying mechanism is connected to the side support 13; the partition conveying mechanism is connected to the fixing ring 3; a bead pressing assembly is connected to the lower side of the fixing ring 3; the bead pressing assembly is closely attached to the outer edge of the annular soft sheet 6; a rotary slag scraping mechanism is connected to the fixing ring 3.

[0040] As Figure 3 , Figure 6 and Figure 8 shown, the partition conveying mechanism includes a connecting pipe 51, a conduit 52, a telescopic pipe 521 and a flow splitting assembly; a connecting pipe 51 is fixedly connected to the right side of the fixing ring 3; the connecting pipe 51 is connected to the annular pipe 4; a conduit 52 is connected to the upper side of the connecting pipe 51; the upper side of the conduit 52 penetrates through the kettle body 2; the upper side of the conduit 52 is fixedly connected to the side support 13; the middle of the conduit 52 is arranged in a telescopic pipe 521 structure; a flow splitting assembly is connected inside the connecting pipe 51.

[0041] As shown in FIG. 10, the flow splitting assembly includes a flow splitting valve 53, a motor 54 and a rotating shaft 55; the right end inside the connecting pipe 51 is rotatably connected to a flow splitting valve 53; a flow splitting groove 531 structure penetrating left and right is opened on the upper side of the flow splitting valve 53; a motor 54 is bolted to the left side of the connecting pipe 51; a rotating shaft 55 is rotatably connected inside the connecting pipe 51; the output shaft of the motor 54 is fixedly connected to the rotating shaft 55.

[0042] As Figures 5 - 7As shown in the figure, the bead pressing assembly includes a vertical electric push rod 71, a connecting plate 72, and an annular push rod 73; a plurality of vertical electric push rods 71 are equidistantly bolted around the fixed ring 3; a connecting plate 72 is fixedly connected to the telescopic end of each vertical electric push rod 71; an annular push rod 73 is fixedly connected between the outer ends of all the connecting plates 72; all the annular push rods 73 are closely attached to the outer edge of the annular soft sheet 6.

[0043] As Figure 4 and Figure 5 As shown in the figure, the rotary slag scraping mechanism includes an annular slider 81, a toothed ring 82, a driving motor 83, a sleeve shaft 84, a spline shaft 85, a spur gear 86, and a scraping assembly; an annular slider 81 is slidably connected to the upper side of the fixed ring 3; a toothed ring 82 is fixedly connected to the annular slider 81; a driving motor 83 is bolted to the side bracket 13; a sleeve shaft 84 is rotatably connected between the side bracket 13 and the kettle body 2; the output shaft of the driving motor 83 is fixedly connected to the sleeve shaft 84; a spline shaft 85 is connected inside the sleeve shaft 84; the lower side of the spline shaft 85 is rotatably connected to the fixed ring 3; a spur gear 86 is fixedly connected to the lower end of the spline shaft 85; the spur gear 86 meshes with the toothed ring 82; a plurality of scraping assemblies are arranged around the annular slider 81.

[0044] As Figure 11 and Figure 12 As shown in the figure, the scraping assembly includes a fixing plate 91, a single slider 92, a horizontal electric push rod 93, and a scraper 94; a fixing plate 91 is bolted to the upper side of the annular slider 81; a single slider 92 is slidably connected to the outer end of the fixing plate 91; a horizontal electric push rod 93 is bolted to the upper side of the fixing plate 91; the telescopic end of the horizontal electric push rod 93 is fixedly connected to the single slider 92; a scraper 94 is fixedly connected to the outer end of the single slider 92; the lower end of each scraper 94 is set to be an arc structure that slopes away from the kettle body 2 from top to bottom; a liquid storage tank 941 structure is provided on one side of the upper surface of each scraper 94 close to the kettle body 2.

[0045] Pre-treatment work of the wall coating device for the easily dischargeable polyvinyl chloride polymerization kettle before wall coating:

[0046] After the kettle body 2 completes a cycle of the production of the liquid to be treated, the treated liquid in the kettle body 2 is discharged to the next treatment equipment through the drain valve 21, and then the drain valve 21 is connected to the waste liquid pool through a pipeline, and the upper end of the guide tube 52 is connected to the steam delivery device, and the external steam delivery device delivers high-temperature steam to the inside of the annular tube 4 through the guide tube 52 and the connecting pipe 51. At this time, the diverter groove 531 connects the connecting pipe 51 and the upper area of ​​the annular tube 4, and the high-temperature steam in the connecting pipe 51 is discharged. The steam fills the upper area of ​​the annular tube 4 through the diverter groove 531. At the same time, the high-temperature steam in the upper area of ​​the annular tube 4 is sprayed out to the inner wall of the kettle body 2 and rises to the top through each upper nozzle 42 in an inclined upward manner, so that the high-temperature steam gradually covers the interior of the kettle body 2 from top to bottom under the action of gravity, and in this way, the original air inside the kettle body 2 is discharged from top to bottom through the drain valve 21, so that the kettle body 2 is rapidly heated under the cover of the high-temperature steam, which is beneficial to accelerate the softening speed of the residue on the inner wall of the kettle body 2.

[0047] Then, the output shaft of the driving motor 83 drives the sleeve shaft 84 to rotate, and the sleeve shaft 84 drives the spur gear 86 to rotate through the spline shaft 85. The spur gear 86 meshes with the gear ring 82 to drive the annular slider 81 to rotate slowly, and the annular slider 81 drives each scraping component to rotate. At the same time, the transverse electric push rods 93 of each scraping component respectively push the single slider 92 connected to it to drive the scraper 94 to push outward, so that the outer surface of the scraper 94 contacts the inner wall of the kettle body 2. At the same time, all the lifting cylinders 12 synchronously drive the fixed ring 3 to move downward, and the fixed ring 3 drives the annular tube 4, the annular film 6 and the rotating scraping mechanism to move downward. The annular tube 4 pulls the telescopic tube 521 in the middle of the guide tube 52 to stretch downward, and the fixed ring 3 drives the spline shaft 85 to slide downward along the sleeve shaft 84, so that the scraper 94 rotates slowly with the moving annular slider 81 to scrape the residue adhered to the inner wall of the kettle body 2. At the same time, the scraper 94 passes through various areas of the inner wall of the kettle body 2 from top to bottom in sequence to complete the scraping of the residue on the inner wall of the kettle body 2.

[0048] While the scraper 94 scrapes the residue on the inner wall of the kettle body 2 in a slow rotation manner, part of the water in the high-temperature steam sprayed from the annular pipe 4 onto the inner wall of the kettle body 2 will flow downward along the inner wall of the kettle body 2. When this water flows through the scraper 94, the water flowing onto the scraper 94 will be gathered in its liquid storage tank 941, so that a continuously flowing liquid film covers the surface of the liquid storage tank 941. When the scraper 94 contacts the residue on the inner wall of the kettle body 2, the liquid film on the liquid storage tank 941 first contacts the residue, so that the residue is quickly softened by the water in the liquid film in a high-temperature environment, and then the main body of the scraper 94 rotating later can smoothly scrape the residue. Since the lower ends of the scrapers 94 are all arc-shaped structures that slope away from the kettle body 2 from top to bottom, during the rotation of the scraper 94 from top to bottom, residues of different sizes can be scraped successively. Especially for fine residues, they can be effectively scraped clean on the premise of not damaging the inner wall of the kettle body 2.

[0049] The residue scraped from the inner wall of the kettle body 2 is discharged into the waste liquid pool through the drain valve 21 along with the water flow, ending the pre-treatment work before coating the wall.

[0050] The wall coating treatment work of this easily dischargeable polyvinyl chloride polymerization kettle wall coating device:

[0051] After the pre-treatment work before coating the wall is completed, the lifting cylinder 12 synchronously drives the fixed ring 3 to move upward. The fixed ring 3 drives the annular pipe 4, the annular soft sheet 6 and the rotary slag scraping mechanism to reset upward. The output shaft of the drive motor 83 stops driving the sleeve shaft 84 to rotate, so that the scraper 94 stops running. At the same time, the horizontal electric push rod 93 pulls the single slider 92 to drive the scraper 94 to retract inward and leave the inner wall of the kettle body 2.

[0052] Then, the telescopic end of the vertical electric push rod 71 drives the connecting plate 72 and the annular push rod 73 to move downward. At the same time, each elastic piece 61 that was initially compressed simultaneously pushes the outer edge of the annular soft sheet 6 to expand outward, so that the distance between the outer edge of the annular soft sheet 6 and the inner wall of the kettle body 2 is reduced. At this time, the annular push rod 73 keeps close to the lower side of the outer edge of the annular soft sheet 6, so that all parts of the outer edge of the annular soft sheet 6 are at the same horizontal height. At the same time, the output shaft of the motor 54 drives the rotating shaft 55 to rotate, and the rotating shaft 55 drives the flow dividing valve 53 to rotate 180 degrees, and the flow dividing groove 531 communicates with the lower region of the connecting pipe 51 and the annular pipe 4.

[0053] Subsequently, anti-sticking agent is added to the external steam conveying equipment, and the external steam conveying equipment conveys the anti-sticking agent to the lower area of ​​the annular tube 4 along with the high-temperature steam. The high-temperature steam carrying the anti-sticking agent quickly fills the entire annular tube 4, and at the same time, the high-temperature steam carries the anti-sticking agent and is sprayed downward from the lower nozzle 43 to the middle area of ​​the annular film 6. The lower nozzles 43 are all set to a flat mouth structure that is wide in the horizontal direction and narrow in the vertical direction, so that both the high-temperature steam and the anti-sticking agent are sprayed on the annular film 6 to prevent part of the sprayed high-temperature steam from escaping directly upward without contacting the annular film 6. The anti-sticking agent sprayed on the annular film 6 is accumulated in the middle area of ​​the annular film 6 along with the moisture in the high-temperature steam, while the remaining moisture and high-temperature steam leave the annular film 6 upward, changing part of the high-temperature steam to remain covering the inside of the kettle body 2, so that the inside of the kettle body 2 remains in a high temperature state.

[0054] As the liquid level of the anti-sticking agent accumulated in the middle area of ​​the annular film 6 rises, the anti-sticking agent will overflow from the edge area of ​​the annular film 6, and the overflowing anti-sticking agent flows into the gap between the edge area of ​​the annular film 6 and the inner wall of the kettle body 2, and adheres to the inner wall of the kettle body 2. At the same time, the lifting cylinder 12 synchronously drives the fixed ring 3 to move downward, and the fixed ring 3 drives the annular tube 4, the annular film 6 and the rotating scraping mechanism to move downward, so that the anti-sticking agent overflowing from the edge area of ​​the annular film 6 can be evenly coated on the inner wall of the kettle body 2 during the downward movement.

[0055] Through this processing step, even if the lower nozzles 43 of the annular tube 4 are blocked to varying degrees, the liquid levels of the anti-sticking agent accumulated in the middle area of ​​the annular film 6 can be kept flat, allowing the anti-sticking agent to evenly complete the coating of the inner wall of the kettle body 2 in an overflow manner.

[0056] The above description is only an example of the present invention and is not intended to limit the present invention. Any equivalent substitutions made within the principles of the present invention should be included in the protection scope of the present invention. The contents not elaborated in detail in the present invention belong to the existing technologies known to those skilled in the art.

Claims

1. A wall coating device for a PVC polymerization kettle with easy discharging, comprising: A main support (1) and a kettle body (2); the kettle body (2) is installed inside the main support (1); Characterized in that: It also includes a fixed ring (3), an annular pipe (4) and an annular flexible sheet (6); A drain valve (21) is connected to the lower side of the kettle body (2); several fixing frames (11) are fixedly connected to the upper side of the main bracket (1); a lifting cylinder (12) is fixedly connected to each fixing frame (11); the telescopic ends of all the lifting cylinders (12) penetrate through the kettle body (2); a fixed ring (3) is fixedly connected between the telescopic ends of all the lifting cylinders (12); an annular pipe (4) is fixedly connected to the outer edge of the fixed ring (3); the interior of the annular pipe (4) is divided into an upper region and a lower region by a partition piece (41); several upper nozzles (42) are connected to the upper region of the annular pipe (4) in a surrounding manner; several lower nozzles (43) are connected to the lower region of the annular pipe (4) in a surrounding manner; an annular flexible sheet (6) is fixedly connected to the lower side of the fixed ring (3); several elastic sheets (61) are fixedly connected between the annular pipe (4) and the annular flexible sheet (6); a side bracket (13) is fixedly connected between the main bracket (1) and the right side of the kettle body (2); a partition conveying mechanism is connected to the right side of the annular pipe (4); the upper side of the partition conveying mechanism penetrates through the pipe kettle body (2); the partition conveying mechanism is connected to the side bracket (13); the partition conveying mechanism is connected to the fixed ring (3); a pressing edge assembly is connected to the lower side of the fixed ring (3); a rotary slag scraping mechanism is connected to the fixed ring (3); when the pressing edge assembly presses the outer edge of the annular flexible sheet (6), the annular flexible sheet (6) bends and contracts to generate deformation, facilitating the normal operation of the rotary slag scraping mechanism; when the pressing edge assembly leaves the annular flexible sheet (6), the annular flexible sheet (6) expands outwards to work by overflow coating on the wall; The pressing edge assembly includes a vertical electric push rod (71), a connecting plate (72) and an annular push rod (73); Several vertical electric push rods (71) are fixedly connected to the fixed ring (3) at equal intervals; a connecting plate (72) is fixedly connected to the telescopic end of each vertical electric push rod (71); an annular push rod (73) is fixedly connected between the outer ends of all the connecting plates (72); all the annular push rods (73) are closely attached to the outer edge of the annular flexible sheet (6); The rotary slag scraping mechanism includes an annular slider (81), a toothed ring (82), a driving motor (83), a sleeve shaft (84), a spline shaft (85), a spur gear (86) and a scraping component; An annular slider (81) is slidably connected to the upper side of the fixed ring (3); a toothed ring (82) is fixedly connected to the annular slider (81); a driving motor (83) is fixedly connected to the side bracket (13); a sleeve shaft (84) is rotatably connected between the side bracket (13) and the kettle body (2); the output shaft of the driving motor (83) is fixedly connected to the sleeve shaft (84); a spline shaft (85) is connected to the interior of the sleeve shaft (84); the lower side of the spline shaft (85) is rotatably connected to the fixed ring (3); a spur gear (86) is fixedly connected to the lower end of the spline shaft (85); the spur gear (86) meshes with the toothed ring (82); several scraping components are arranged around the annular slider (81); The scraping assembly includes a fixed plate (91), a single slider (92), a horizontal electric push rod (93) and a scraper (94); the upper side of the annular slider (81) is fixedly connected with the fixed plate (91); the outer end of the fixed plate (91) is slidably connected with the single slider (92); the upper side of the fixed plate (91) is fixedly connected with the horizontal electric push rod (93); the telescopic end of the horizontal electric push rod (93) is fixedly connected with the single slider (92); the outer end of the single slider (92) is fixedly connected with the scraper (94); the lower end of each scraper (94) is set as an arc structure that inclines away from the kettle body (2) from top to bottom; On the upper surface of each scraper (94), a liquid storage tank (941) structure is provided on the side close to the kettle body (2).

2. The wall coating device for a PVC polymerization kettle with easy discharging according to claim 1, characterized in that, The partition piece (41) is set as a structure with the middle arched upward.

3. The wall coating device for a PVC polymerization kettle with easy discharging according to claim 1, characterized in that, Each lower nozzle (43) is set as a flat nozzle structure that is wide horizontally and narrow vertically.

4. The wall coating device for a PVC polymerization kettle with easy discharging according to claim 1, characterized in that, zoning The conveying mechanism includes a connecting pipe (51), a conduit (52), a telescopic pipe (521) and a flow splitting assembly; the right side of the fixed ring (3) is fixedly connected with the connecting pipe (51); the connecting pipe (51) is connected to the annular pipe (4); the upper side of the connecting pipe (51) is connected to the conduit (52); the upper side of the conduit (52) penetrates through the kettle body (2); the upper side of the conduit (52) is fixedly connected with the side bracket (13); the middle part of the conduit (52) is set as a telescopic pipe (521) structure; a flow splitting assembly for distributing and introducing the fluid into the upper area and the lower area of the annular pipe (4) is connected inside the connecting pipe (51).

5. The wall coating device for a PVC polymerization kettle with easy discharging according to claim 4, characterized in that, The flow splitting assembly includes a flow splitting valve (53), a motor (54) and a rotating shaft (55); The right end inside the connecting pipe (51) is rotatably connected with the flow splitting valve (53); a flow splitting groove (531) structure that penetrates left and right is provided on the upper side of the flow splitting valve (53); the left side of the connecting pipe (51) is fixedly connected with the motor (54); the rotating shaft (55) is rotatably connected inside the connecting pipe (51); the output shaft of the motor (54) is fixedly connected with the rotating shaft (55).

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