CN113581761A - Composite anti-corrosion type shafted spiral conveyor and hot-melt plastic lining anti-corrosion process thereof - Google Patents
Composite anti-corrosion type shafted spiral conveyor and hot-melt plastic lining anti-corrosion process thereof Download PDFInfo
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- CN113581761A CN113581761A CN202110924438.9A CN202110924438A CN113581761A CN 113581761 A CN113581761 A CN 113581761A CN 202110924438 A CN202110924438 A CN 202110924438A CN 113581761 A CN113581761 A CN 113581761A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G33/00—Screw or rotary spiral conveyors
- B65G33/08—Screw or rotary spiral conveyors for fluent solid materials
- B65G33/14—Screw or rotary spiral conveyors for fluent solid materials comprising a screw or screws enclosed in a tubular housing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0218—Pretreatment, e.g. heating the substrate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G33/00—Screw or rotary spiral conveyors
- B65G33/24—Details
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G33/00—Screw or rotary spiral conveyors
- B65G33/24—Details
- B65G33/26—Screws
- B65G33/265—Screws with a continuous helical surface
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2202/00—Metallic substrate
- B05D2202/10—Metallic substrate based on Fe
- B05D2202/15—Stainless steel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2507/00—Polyolefins
- B05D2507/01—Polyethylene
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- Screw Conveyors (AREA)
Abstract
The invention discloses a composite anti-corrosion type shafted spiral conveyor and a hot-melting plastic lining anti-corrosion process thereof, wherein the conveyor comprises a glass fiber reinforced plastic lining conveying trough and a hot-melting plastic spiral body; the glass fiber reinforced plastic lining material conveying tank comprises a carbon steel material conveying tank and a discharge opening; the hot-melting plastic spiral body comprises a spiral blade and a spiral central shaft, and the spiral blade is welded on the spiral central shaft to form a semi-stainless steel spiral body; the key points of the innovative scheme are as follows: different materials and composite anti-corrosion methods are adopted according to the component conditions: (1) the glass fiber reinforced plastic lining conveying chute adopts the inner surface of the carbon steel conveying chute to be lined with glass fiber reinforced plastic for corrosion prevention, and has low production cost and good corrosion prevention performance; (2) the hot-melting plastic spiral body is innovative, a semi-stainless steel spiral body is hot-melting lined on the whole surface to be plastic-lined for corrosion prevention, the spiral can not be lined as an energy lining, and the corrosion prevention performance is excellent. A hot-melt plastic lining anticorrosion process, namely a PE powder hot-melt plastic lining method, namely a semi-stainless steel spiral body heating method, uniformly spreading PE polyethylene resin powder on the surface of the semi-stainless steel spiral body, and coating a PE hot-melt plastic anticorrosion layer with the thickness of 3 mm; the service life of the equipment is prolonged and the efficiency is increased.
Description
Technical Field
The invention belongs to the technical field of horizontal anti-corrosion type shafted screw conveyors which are matched with filter presses, and relates to a composite anti-corrosion method for a glass fiber reinforced plastic lining material conveying chute and a hot-melting plastic lining spiral body.
Background
The screw conveyer is a device which utilizes a motor to drive a screw to rotate and push materials to realize the purpose of closed conveying; the shaft screw conveyer is a screw conveyer which is provided with a screw central shaft and the helical blade does not contact the bottom of a material conveying groove; the anti-corrosion type shaft screw conveyer is a shaft screw conveyer which is made of anti-corrosion materials and is used for parts (a material conveying groove and a spiral body) of the screw conveyer which are contacted with corrosive materials; the horizontal anti-corrosion type shafted screw conveyor is an anti-corrosion type shafted screw conveyor with a horizontal or slightly inclined angle in the material conveying displacement direction; mainly comprises a driving device, a glass fiber reinforced plastic conveying trough, a stainless steel spiral body, a bearing device, a conveying trough cover plate and a feed hopper; the driving device comprises a speed reducing motor and a machine head coupling; the glass fiber reinforced plastic conveying chute comprises a U-shaped conveying chute and a discharge opening; the stainless steel spiral body comprises spiral blades and a spiral central shaft; the bearing device comprises a tail thrust bearing and a middle suspension bearing.
The working principle and process of the screw conveyer are as follows: the screw conveyer is used with the filter press in a matching way, materials (filter cakes) are input into the glass fiber reinforced plastic conveying trough from the feed hopper, the speed reduction motor drives the stainless steel spiral body to rotate, the spiral blade continuously pushes the materials to slide towards the discharge opening, the materials can only move forwards along the bottom of the glass fiber reinforced plastic conveying trough under the pushing of the blade due to the gravity of the materials and the friction force generated between the materials and the trough wall, the materials can not rotate along with the spiral blade, the situation is as if the nut can only do translational motion along the rotating screw rod, but the nut can not rotate along with the screw rod, the materials are output from the discharge opening, and the remote closed conveying of the filter cakes is realized; the device is suitable for 70 m internal closed horizontal conveying of non-viscous non-winding corrosive filter cakes.
The corrosion prevention method of the screw conveyer comprises the following steps: the screw conveyer part that contacts corrosive materials has defeated silo and spirochaeta to there is friction with the material, takes different corrosion protection measures because of structural reason usually: (1) the conveying chute adopts the inner surface of the chute to be lined with glass fiber reinforced plastics for corrosion prevention, and can adapt to a strong corrosive environment; (2) the spiral body is an axial spiral body, and is very difficult to line with glass fiber reinforced plastics due to the spiral blade with the nonlinear curved surface, and the quality of the glass fiber reinforced plastics is unreliable, so the spiral body is made of stainless steel, and the stainless steel spiral body can be durable in a weak corrosive environment, but is not suitable for a strong corrosive environment, and has a limited service life.
The existing screw conveyor anticorrosion method has the following defects: the glass fiber reinforced plastic of the spiral body with the shaft is very difficult, the glass fiber reinforced plastic of the spiral body with the shaft is unreliable in quality, the stainless steel material is adopted for corrosion prevention, the glass fiber reinforced plastic is not suitable for a strong corrosive environment, a non-viscous non-winding strong corrosive filter cake is conveyed, the glass fiber reinforced plastic is still easily corroded, particularly, the service life of a spiral blade is limited, the continuous production is influenced by the regular maintenance or replacement, the use and maintenance cost is high, and the technical problem of spiral body corrosion prevention, which is always expected to be solved but cannot be successfully obtained, is solved.
Disclosure of Invention
The invention aims to overcome the defects of an anti-corrosion method of the existing screw conveyer, solve the technical problems that the screw body with the shaft is very difficult to line with the glass fiber reinforced plastics, the quality of the screw body with the glass fiber reinforced plastics is unreliable, the screw body with the shaft is anti-corrosive by adopting stainless steel materials, the screw body with the shaft is not suitable for a strong corrosive environment, a filter cake with strong corrosion is conveyed, and the screw blade is easy to corrode, and provides the composite anti-corrosion screw conveyer with the shaft and the hot-melt plastic lining anti-corrosion process thereof; composite anticorrosion means that the conveying chute adopts the inner surface of the chute to be lined with glass fiber reinforced plastics for anticorrosion, and a spiral body innovatively adopts the full-surface hot-melting plastic-lined anticorrosion.
The invention solves the problems of the prior art and adopts the innovative technical scheme that: a composite anti-corrosion type spiral conveyer with shaft (hereinafter referred to as anti-corrosion spiral conveyer), namely a horizontal composite anti-corrosion type spiral conveyer with shaft, mainly comprises a driving device, a glass fiber reinforced plastic lining material conveying groove, a hot melt plastic spiral body, a bearing device, a material conveying groove cover plate and a feed hopper; the driving device comprises a speed reducing motor and a machine head coupling; the glass fiber reinforced plastic lining material conveying tank comprises a carbon steel material conveying tank, a discharge opening and a glass fiber reinforced plastic anticorrosive layer; the hot-melt plastic spiral body comprises a spiral blade, a spiral central shaft and a hot-melt plastic anticorrosive layer, wherein the spiral blade is welded on the spiral central shaft to form a semi-stainless steel spiral body (a stainless steel blade carbon steel shaft); the bearing device comprises a tail thrust bearing and a middle suspension bearing. The main point of the general technical scheme is that compared with the prior art, the innovative general structure has the prominent substantive characteristics that: different materials and composite anti-corrosion methods are adopted according to the component conditions: (1) the glass fiber reinforced plastic lining conveying chute is anticorrosive by adopting a carbon steel conveying chute lining with glass fiber reinforced plastic, and has low production cost and good anticorrosive performance; (2) the hot-melt plastic spiral body is characterized in that the original full stainless steel spiral body is innovated into a semi-stainless steel spiral body, hot-melt plastic lining is anticorrosive, a spiral can not be lined as an energy lining, and the anticorrosive performance is excellent; the whole surface of the semi-stainless steel spiral body contacting with the material is coated with a PE polyethylene resin hot-melt plastic anticorrosive layer with the thickness of 3mm to form a hot-melt plastic spiral body, and the polyethylene resin is a well-known most ideal anticorrosive material; the hot-melt plastic spiral body is used for replacing a stainless steel hot-melt plastic spiral body, so that the corrosion resistance, the wear resistance and the aging resistance are strong, the hot-melt plastic spiral body is suitable for a strong corrosive environment, the surface is smooth, durable and reliable in quality, and the hot-melt plastic lining (powder spreading plastic lining) of the spiral body by spreading PE powder is particularly convenient; therefore, the technical problems that the shaft-containing spiral body is very difficult to line with the glass fiber reinforced plastics, the quality of the spiral body lining with the glass fiber reinforced plastics is unreliable, the spiral blade is easy to corrode by adopting stainless steel materials for corrosion prevention, not adapting to a strong corrosive environment and conveying a strong corrosive filter cake are solved; the specific design scheme is as follows:
the carbon steel conveying trough is a U-shaped carbon steel conveying trough with two closed ends and comprises a conveying trough main body, a trough body left end plate, a trough body right end plate and a discharge opening; the conveying chute main body is a U-shaped outer folded chute body, a discharge port hole is formed below the tail part of the conveying chute main body, and the height of the conveying chute main body is larger than the diameter of the helical blade; the left end plate and the right end plate of the tank body correspond to the section of the main body of the material conveying tank, and the left end plate and the right end plate are respectively provided with a spiral central shaft hole and a machine head coupling hole; the discharge opening is a cylindrical discharge opening; the left end plate and the right end plate of the tank body are respectively welded at two ends of the main body of the material conveying tank, and the discharge port is welded in a discharge port hole at the tail part of the main body of the material conveying tank to form a carbon steel material conveying tank; the inner surface of the carbon steel conveying chute is lined with glass fiber reinforced plastics, and the outer surface of the carbon steel conveying chute is coated with anti-rust paint to form the glass fiber reinforced plastics lined conveying chute.
The spiral blade is a stainless steel left spiral blade, the material outlet end of the spiral blade is provided with a circle of reverse right spiral blades for preventing materials from blocking the end part, and the diameter of the spiral blade is smaller than the width of the conveying chute main body; the spiral central shaft is a single-shaft head spiral central shaft and comprises a stainless steel single-shaft head, a carbon steel thick-wall steel pipe shaft and a stainless steel coupling flange; the stainless steel single-shaft head and the coupling flange are respectively welded at two ends of the thick-wall steel pipe shaft to form a spiral central shaft; the helical blades are welded on the helical central shaft, wherein a circle of right helical blade is positioned at the head end of the stainless steel single shaft to form a semi-stainless steel helical body; and coating a PE polyethylene resin hot-melt plastic anticorrosive layer with the thickness of 3mm on the whole surface of the semi-stainless steel spiral body to form the hot-melt plastic spiral body.
The connection relation of the main parts is as follows: (1) assembling non-spiral parts: the feeding hopper is arranged on the right upper surface of the glass fiber reinforced plastic lining conveying chute, the discharge opening is arranged on the left lower surface of the glass fiber reinforced plastic lining conveying chute (the discharge opening can be increased according to requirements), the tail thrust bearing is arranged outside the center of the tail end of the glass fiber reinforced plastic lining conveying chute, and a plurality of middle suspension bearings are hung on the upper edge of the inner wall of the glass fiber reinforced plastic lining conveying chute at intervals; the cover plate of the material conveying groove covers the material conveying groove lined with the glass fiber reinforced plastics; (2) assembling a spiral part: the shaft head at the left end of the hot-melt plastic spiral body is arranged in the tail thrust bearing, the coupling flange at the right end of the hot-melt plastic spiral body is connected with the machine head coupling, the spiral central shaft at the middle section of the hot-melt plastic spiral body is hoisted in the middle suspension bearing, and the whole hot-melt plastic spiral body is positioned in the glass fiber reinforced plastic lining conveying trough, but the spiral blade of the hot-melt plastic spiral body does not contact the bottom of the glass fiber reinforced plastic lining conveying trough; (3) the driving device is assembled: the speed reducing motor is arranged on the head seat or the tail seat (in order to enable the axial screw to be in a favorable tension state, the driving device and the discharge opening are generally arranged at the same end of the conveyor), and a machine head coupling is used for coupling an output shaft of the speed reducing machine and a coupling flange at the right end of the hot melt plastic screw. The corrosion-resistant screw conveyor is matched with a filter press for use, and can horizontally convey non-viscous non-winding strong-corrosion filter cakes in a closed manner within 70 meters.
The invention also provides a hot-melt plastic lining anticorrosion process, namely the hot-melt plastic lining anticorrosion process of the spiral body of the composite anticorrosion type spiral conveyor with the shaft, which comprises the following steps: (1) sand blasting and rust removing: using sand blasting equipment to perform sand blasting rust removal on the semi-stainless steel spiral body to ensure that the surface rust removal grade reaches Sa3 grade of GB/T8923; (2) and (3) blowing off the surface: blowing dust on the surface of the derusted semi-stainless steel spiral body by using clean compressed gas; (3) baking and heating: baking the surface of the cleaned semi-stainless steel spiral body by using natural gas, wherein the baking temperature is 170 ℃; (4) hot melting lining plastic: when the temperature of the semi-stainless steel spiral body is stabilized at 150-; (5) electric leakage detection: after the hot-melt plastic spiral body is naturally cooled, 10000V electric sparks are used for detecting whether electric leakage exists; if the leakage occurs, repairing the defect and detecting again; if no electricity is leaked, the hot-melt plastic spiral body is qualified. The hot melt plastic lining has better corrosion resistance than glass fiber reinforced plastic lining.
The composite anti-corrosion type shafted spiral conveyor and the hot-melting plastic lining anti-corrosion process thereof have the obvious advantages of low cost of the spiral hot-melting plastic lining, convenience for the spiral hot-melting plastic lining, strong corrosion resistance, wear resistance and aging resistance, durability and reliable quality; the beneficial effects are as follows: (1) the carbon steel conveying chute 11 is lined with glass fiber reinforced plastics for corrosion prevention, so that the production cost is low and the corrosion resistance is good; (2) PE powder is scattered on the whole surface of the semi-stainless steel spiral body for hot melting plastic lining to form a hot melting plastic spiral body, and the hot melting plastic spiral body is used for replacing the stainless steel spiral body so as to adapt to a strong corrosive environment; solves the technical problem that people are eagerly to solve but can not obtain the successful spiral body anticorrosion (the problem that the axial spiral body can not be lined with glass fiber reinforced plastics); the maintenance or replacement of the helical blade is reduced, the use and maintenance cost is reduced, and the service life of the helical conveyor is prolonged; the anticorrosion method is innovative, and the equipment has long service life and high efficiency.
Drawings
FIG. 1 is a schematic view of the assembly of the composite corrosion-resistant axial screw conveyor of the present invention.
FIG. 2 is a schematic view of a hot melt plastic helix of the composite corrosion-resistant shafted screw conveyor of the present invention.
FIG. 3 is a cross-sectional view of a glass fiber reinforced plastic-lined conveying chute of the composite corrosion-resistant type screw conveyor with a shaft according to the present invention.
FIG. 4 is a schematic cross-sectional view of the anti-corrosion component of the composite anti-corrosion type spiral conveyor with a shaft according to the present invention (including the non-contact relationship between the hot-melt plastic spiral body and the glass fiber reinforced plastic lining material conveying chute).
Reference numerals: 1-a speed reducing motor, 2-a feed hopper, 3-a glass fiber reinforced plastic lining material conveying tank (comprising a discharge port), 4-a middle suspension bearing, 5-a helical blade, 6-a helical central shaft, 7-a hot-melt plastic helical body, 8-a discharge port, 9-a tail thrust bearing, 10-a hot-melt plastic anticorrosive layer, 11-a carbon steel material conveying tank and 12-a glass fiber reinforced plastic anticorrosive layer.
Detailed Description
The technical solution in the embodiment of the present invention is described below with reference to the drawings in the embodiment of the composite anticorrosion shafted screw conveyor and the hot-melt plastic lining anticorrosion process thereof, and the described embodiment is only a part of the preferred embodiment of the present invention, but not all embodiments. Based on the embodiment of the invention, all other embodiments without creativity, such as the anticorrosion type shafted screw conveyor with the same hot-melt plastic lining anticorrosion method and similar structure, made by the technical personnel in the field, belong to the protection scope of the invention.
Example 1
The anti-corrosion component of the composite anti-corrosion type shaft screw conveyor, namely the anti-corrosion component of the shaft screw conveyor contacting with strong corrosive materials, comprises a glass fiber reinforced plastic lining material conveying chute 3 and a hot melt plastic spiral body 7; the glass fiber reinforced plastic lining material conveying trough 3 comprises a carbon steel material conveying trough, a discharge opening 8 and a glass fiber reinforced plastic anticorrosive coating 12; the hot melt plastic spiral body 7 comprises a spiral blade 5, a spiral central shaft 6 and a hot melt plastic anticorrosive layer 10; the helical blade 5 is welded on the helical central shaft 6 to form a semi-stainless steel helical body (a stainless steel blade carbon steel shaft); the main points of the overall embodiment of the innovation are: different materials and composite anti-corrosion methods are adopted according to the component conditions: (1) the glass fiber reinforced plastic lining conveying chute 3 adopts a carbon steel conveying chute 11 to be lined with glass fiber reinforced plastic for corrosion prevention, and has low production cost and good corrosion prevention performance; (2) the hot-melt plastic spiral body 7 is characterized in that the original full stainless steel spiral body is innovated into a semi-stainless steel spiral body, hot-melt plastic lining is anticorrosive, a variable spiral can not be lined as an energy lining, and the anticorrosive performance is excellent; namely, a PE polyethylene resin hot melt plastic anticorrosive layer 10 with the thickness of 3mm is coated on the whole surface of the semi-stainless steel spiral body contacting materials to form a hot melt plastic spiral body 7, and the polyethylene resin is a well-known ideal anticorrosive material; the hot-melt plastic spiral body 7 is used for replacing a stainless steel hot-melt plastic spiral body, so that the corrosion resistance, the wear resistance and the aging resistance are strong, the environment with strong corrosion is adapted, the surface is smooth, durable and reliable in quality, and the hot-melt plastic lining (powder spreading plastic lining) with PE powder spread by the spiral body is particularly convenient; specific embodiments are described in detail below.
The carbon steel conveying chute 11 is a U-shaped carbon steel conveying chute with two closed ends, and comprises a conveying chute main body, a chute body left end plate, a chute body right end plate and a discharge opening 8; the conveying chute main body is a U-shaped outer folded chute body, a discharge opening 8 hole is formed below the tail part of the conveying chute main body, and the height of the conveying chute main body is larger than the diameter of the helical blade 5; the left end plate and the right end plate of the tank body correspond to the section of the main body of the feed delivery tank, and the left end plate and the right end plate are respectively provided with a spiral central shaft 6 hole and a machine head coupling hole; the discharge opening 8 is a cylindrical discharge opening 8; the left end plate and the right end plate of the tank body are respectively welded at two ends of the main body of the material conveying tank, and the discharge port 8 is welded in a discharge port hole at the tail part of the main body of the material conveying tank to form a carbon steel material conveying tank; the inner surface of the carbon steel conveying chute is lined with glass fiber reinforced plastics, and the outer surface of the carbon steel conveying chute is coated with antirust paint to form a conveying chute 3 lined with glass fiber reinforced plastics and used as a conveying channel for corrosive filter cakes.
The spiral blade 5 is a stainless steel left spiral blade 5, the material outlet end of the spiral blade 5 is provided with a circle of reverse right spiral blades for preventing the material from blocking the end part, and the diameter of the spiral blade 5 is smaller than the width of the material conveying groove main body; the spiral central shaft 6 is a single-shaft head spiral central shaft 6 and comprises a stainless steel single-shaft head, a carbon steel thick-wall steel pipe shaft and a stainless steel coupling flange; according to the requirement of the material conveying distance, the longer thick-wall steel pipe shaft adopts a sectional type, and the adjacent sections of thick-wall steel pipe shafts are connected by using a middle suspension bearing 4; the stainless steel single-shaft head and the coupling flange are respectively welded at two ends of the thick-wall steel pipe shaft to form a spiral central shaft 6; the helical blades 5 are welded on the helical central shaft 6, wherein a circle of right helical blades is positioned at the head end of the stainless steel single shaft to form a semi-stainless steel helical body; coating a PE polyethylene resin hot-melt plastic anticorrosive layer 10 with the thickness of 3mm on the whole surface of the semi-stainless steel spiral body to form a hot-melt plastic spiral body 7; the hot melt plastic spiral body 7 is integrally positioned in the glass fiber reinforced plastic lining material conveying groove 3, but the spiral blade 5 of the hot melt plastic spiral body does not contact the bottom of the glass fiber reinforced plastic lining material conveying groove 3; the screw blade 5 is driven by the speed reducing motor 1 to rotate, so that the screw blade pushes the materials to slide towards the discharge opening 8.
The glass fiber reinforced plastic comprises an epoxy resin matrix and 5-6 layers of glass fiber reinforced materials, and has deep corrosion resistance; the process of lining the glass fiber reinforced plastic comprises the following steps: (1) preparing resin glue solution: taking a certain amount of silica gel, resin and talcum powder (the resin and the talcum powder are mixed according to the proportion of 1: 2), and uniformly stirring the silica gel, the resin and the talcum powder into a viscous state; (2) lining with glass fiber reinforced plastics: uniformly brushing a layer of resin glue solution on the inner surface of a cleaned carbon steel conveying trough 11, then paving a layer of glass fiber, and repeating the process for 5-6 times to form a glass steel anticorrosive layer 12; (3) trimming: after the resin is cured, trimming the edges of the resin to complete the glass fiber reinforced plastic lined feed chute 3. The production cost can be effectively reduced by adopting the carbon steel conveying chute and the glass fiber reinforced plastic lining for corrosion prevention.
The hot melt molding is to bake the surface of a cleaned semi-stainless steel spiral body (comprising spiral blades 5 and a spiral central shaft 6) by using natural gas, wherein the baking temperature is 170 ℃; when the temperature of the semi-stainless steel spiral body is stabilized at 150-; the spiral hot melting plastic (powder spreading lining plastic) with the nonlinear curved surface is particularly convenient; the hot-melt plastic lining anticorrosion performance is superior to that of glass fiber reinforced plastic lining, and the hot-melt plastic lining anticorrosion is used for replacing the glass fiber reinforced plastic lining anticorrosion, so that the technical problem that the shaft-provided spiral body cannot be lined with the glass fiber reinforced plastic is solved.
The anti-corrosion component of the composite anti-corrosion type shafted spiral conveyor has the advantages of low cost of the glass fiber reinforced plastic conveying chute, convenience in hot melting and plastic lining of the spiral body, strong corrosion resistance, wear resistance and aging resistance, durability and reliable quality; the technical problems that the glass fiber reinforced plastic of the spiral body with the shaft is very difficult to line, the quality of the glass fiber reinforced plastic of the spiral body line is unreliable, the spiral blade 5 is easily corroded due to the adoption of a stainless steel material for corrosion prevention, the filter cake with strong corrosion is conveyed and the environment with strong corrosion is not suitable for the environment with strong corrosion are solved; the technical problem that people are eagerly to solve but can not obtain success for corrosion prevention of the spiral body all the time is solved, the production, use and maintenance cost is reduced, and the service life of the spiral conveyer is prolonged.
Example 2
A composite anti-corrosion type shaft screw conveyer (hereinafter referred to as anti-corrosion screw conveyer), namely a horizontal composite anti-corrosion type shaft screw conveyer, mainly comprises a driving device, a glass fiber reinforced plastic lining material conveying groove 3, a hot melt plastic screw 7, a bearing device, a material conveying groove cover plate and a feed hopper 2; the driving device comprises a speed reducing motor 1 and a machine head coupling; the glass fiber reinforced plastic lining conveying chute 3 comprises a carbon fiber reinforced plastic conveying chute 11, a discharge opening 8 and a glass fiber reinforced plastic anticorrosive layer 12; the hot-melt plastic spiral body 7 comprises a spiral blade 5, a spiral central shaft 6 and a hot-melt plastic anticorrosive layer 10, wherein the spiral blade 5 is welded on the spiral central shaft 6 to form a semi-stainless steel spiral body (a stainless steel blade carbon steel shaft); the bearing device comprises a tail thrust bearing 9 and a middle suspension bearing 4. The main points of the overall embodiment of the innovation are: different materials and composite anti-corrosion methods are adopted according to the component conditions: (1) the glass fiber reinforced plastic lining conveying chute 3 adopts a carbon steel conveying chute 11 to be lined with glass fiber reinforced plastic for corrosion prevention, and has low production cost and good corrosion prevention performance; (2) the hot-melt plastic spiral body 7 is characterized in that the original full stainless steel spiral body is innovated into a semi-stainless steel spiral body, hot-melt plastic lining is anticorrosive, a variable spiral can not be lined as an energy lining, and the anticorrosive performance is excellent; the whole surface of the semi-stainless steel spiral body contacting the material is coated with a PE polyethylene resin hot-melt plastic anticorrosive layer with the thickness of 3mm to form a hot-melt plastic spiral body 7, and the polyethylene resin is a well-known most ideal anticorrosive material; the hot-melt plastic spiral body 7 is used for replacing a stainless steel hot-melt plastic spiral body, has strong corrosion resistance, wear resistance and aging resistance, is suitable for strong corrosive environment, has smooth surface, durability and reliable quality, and is particularly convenient for hot-melt plastic lining by scattering PE powder by the spiral body. And multi-point loading and unloading can be arranged according to the requirement. The invention is manufactured according to the current standard of screw conveyer JB/T7679 in the mechanical industry in China.
Final assembly of the anticorrosive screw conveyor: (1) assembling non-spiral parts: the feeding hopper 2 is arranged on the right upper surface of the glass-lined steel conveying chute 3, the discharge opening 8 is arranged on the left lower surface of the glass-lined steel conveying chute 3 (the discharge opening can be increased according to requirements), the tail thrust bearing 9 is arranged outside the center of the tail end of the glass-lined steel conveying chute 3, and a plurality of middle suspension bearings 4 are alternately hung on the upper edge of the inner wall of the glass-lined steel conveying chute 3; the cover plate of the material conveying groove is covered on the material conveying groove 3 lined with glass fiber reinforced plastics; (2) assembling a spiral part: the shaft head at the left end of the hot melt plastic spiral body 7 is arranged in a tail thrust bearing 9, a coupling flange at the right end of the hot melt plastic spiral body 7 is connected with a machine head coupling, and a spiral central shaft 6 at the middle section of the hot melt plastic spiral body 7 is hung in a middle hanging bearing 4; the hot melt plastic spiral body 7 is integrally positioned in the glass fiber reinforced plastic lining material conveying groove 3, but the spiral blade 5 of the hot melt plastic spiral body does not contact the bottom of the glass fiber reinforced plastic lining material conveying groove 3; (3) the driving device is assembled: the speed reducing motor 1 is installed on a machine head seat or a machine tail seat (in order to enable the axial screw to be in a favorable tension state, a driving device and a discharge opening 8 are generally arranged at the same end of a conveyor), and a machine head coupling is used for connecting an output shaft of the speed reducing machine and a coupling flange at the right end of the hot melt plastic screw 7.
The working principle and process of the corrosion-resistant screw conveyer are as follows: the screw conveyor is used with a filter press in a matching way, materials (filter cakes) are input into a glass fiber reinforced plastic lining conveying chute 3 from a feed hopper 2, a speed reduction motor 1 drives a hot melt plastic spiral body 7 to rotate, a spiral blade 5 continuously pushes the materials to slide towards a discharge opening 8, the materials can only move forwards along the bottom of the glass fiber reinforced plastic lining conveying chute 3 under the pushing of the blade due to the gravity of the materials and the friction force generated between the gravity of the materials and the chute wall, the materials cannot rotate along with the spiral blade 5, the situation is as if the nut can only do translational motion along the rotating screw rod, but the nut cannot rotate along with the screw rod, the materials are output from the discharge opening 8, and the filter cakes are conveyed in a long-distance closed way; the device is suitable for 70 m internal closed horizontal conveying of non-viscous non-winding corrosive filter cakes.
The composite anti-corrosion type shafted screw conveyor provided by the invention has the beneficial effects that: (1) the carbon steel conveying chute 11 is lined with glass fiber reinforced plastics for corrosion prevention, so that the production cost is low and the corrosion resistance is good; (2) PE powder is scattered on the whole surface of the semi-stainless steel spiral body for hot melting and plastic lining to form a hot melting plastic spiral body 7, and the hot melting plastic spiral body is used for replacing the stainless steel spiral body so as to adapt to a strong corrosive environment; solves the technical problem that people are eagerly to solve but can not obtain the successful spiral body anticorrosion (the problem that the axial spiral body can not be lined with glass fiber reinforced plastics); the maintenance or replacement of the helical blade 5 is reduced, the production, use and maintenance cost is reduced, and the service life of the helical conveyor is prolonged; commercially successful, making the applicant the largest filter press and its associated equipment manufacturer worldwide; the anticorrosion method is innovative, and the equipment has long service life and high efficiency.
Claims (3)
1. A composite anti-corrosion shaft-mounted spiral conveyor comprises a driving device, a glass fiber reinforced plastic lining conveying trough, a hot-melt plastic spiral body, a bearing device, a conveying trough cover plate and a feeding hopper; the driving device comprises a speed reducing motor and a machine head coupling; the glass fiber reinforced plastic lining material conveying tank comprises a carbon steel material conveying tank, a discharge opening and a glass fiber reinforced plastic anticorrosive layer; the hot melt plastic spiral body comprises a spiral blade, a spiral central shaft and a hot melt plastic anticorrosive layer; the bearing device comprises a tail thrust bearing and a middle suspension bearing; the method is characterized in that: the glass fiber reinforced plastic lining material conveying groove is characterized in that a glass fiber reinforced plastic anticorrosive layer is lined on the inner surface of a carbon steel material conveying groove, and the outer surface of the glass fiber reinforced plastic lining material conveying groove is coated with antirust paint; the spiral blade of the hot melt plastic spiral body is welded on the spiral central shaft to form a semi-stainless steel spiral body, and the whole surface of the semi-stainless steel spiral body is coated with a PE polyethylene resin hot melt plastic anticorrosive layer with the thickness of 3 mm; the shaft head at the left end of the hot melt plastic spiral body is arranged in the tail thrust bearing, the coupling flange at the right end of the hot melt plastic spiral body is connected with the machine head coupling, and the spiral central shaft at the middle section of the hot melt plastic spiral body is hung in the middle hanging bearing; the hot melt plastic spiral body is integrally positioned in the glass fiber reinforced plastic lining material conveying groove, but the spiral blade of the hot melt plastic spiral body does not contact the bottom of the glass fiber reinforced plastic lining material conveying groove; the non-viscous non-winding strong corrosive filter cake can be horizontally conveyed in a closed manner within 70 meters.
2. The composite corrosion-resistant shafted screw conveyor according to claim 1, wherein: the feed hopper is arranged on the right upper surface of the glass fiber reinforced plastic lining feed chute; the discharge opening is arranged on the left lower surface of the glass fiber reinforced plastic lining material conveying chute; the tail thrust bearing is arranged outside the center of the tail end of the glass fiber reinforced plastic lining conveying chute; the plurality of middle suspension bearings are alternately hung on the upper edge of the inner wall of the glass fiber reinforced plastic lining material conveying groove; the conveying chute cover plate covers the conveying chute lined with the glass fiber reinforced plastic; the speed reducing motor is arranged on the head seat or the tail seat, and the output shaft of the speed reducer and the coupling flange at the right end of the hot melt plastic spiral body are connected by a machine head coupling.
3. A hot-melt plastic lining anticorrosion process, namely the hot-melt plastic lining anticorrosion process of the hot-melt plastic helix of the composite anticorrosion type spiral conveyor with the shaft, which is disclosed by the claims 1 to 2, comprises the following steps: (1) sand blasting and rust removing: using sand blasting equipment to perform sand blasting rust removal on the semi-stainless steel spiral body to ensure that the surface rust removal grade reaches Sa3 grade of GB/T8923; (2) and (3) blowing off the surface: blowing dust on the surface of the derusted semi-stainless steel spiral body by using clean compressed gas; (3) baking and heating: baking the surface of the cleaned semi-stainless steel spiral body by using natural gas, wherein the baking temperature is 170 ℃; (4) hot melting lining plastic: when the temperature of the semi-stainless steel spiral body is stabilized at 150-; (5) electric leakage detection: after the hot-melt plastic spiral body is naturally cooled, 10000V electric sparks are used for detecting whether electric leakage exists; if the leakage occurs, repairing the defect and detecting again; if no electricity is leaked, the hot melting plastic helix is finished.
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| CN202110924438.9A CN113581761A (en) | 2021-08-12 | 2021-08-12 | Composite anti-corrosion type shafted spiral conveyor and hot-melt plastic lining anti-corrosion process thereof |
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| CN1218162A (en) * | 1997-11-25 | 1999-06-02 | 国统水泥制品股份有限公司 | Manufacture of steel pipe with polyethylene coating |
| JP2002104339A (en) * | 2000-09-27 | 2002-04-10 | Tokyo Autom Mach Works Ltd | Controlling device for powdery particle filling machine |
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| CN209081459U (en) * | 2018-11-13 | 2019-07-09 | 北京环能德美环境工程有限公司 | A kind of safe water treatment dosing system of modified form |
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2021
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| CN1218162A (en) * | 1997-11-25 | 1999-06-02 | 国统水泥制品股份有限公司 | Manufacture of steel pipe with polyethylene coating |
| JP2002104339A (en) * | 2000-09-27 | 2002-04-10 | Tokyo Autom Mach Works Ltd | Controlling device for powdery particle filling machine |
| CN202035366U (en) * | 2010-11-04 | 2011-11-16 | 谢庆生 | Automatic pig manure cleaning device for pig house |
| CN102887340A (en) * | 2012-10-25 | 2013-01-23 | 安徽宜桐机械有限公司 | Shaftless screw conveyor |
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