CN109290157A - A kind of production technology of ductile iron pipe liner epoxy resin - Google Patents
A kind of production technology of ductile iron pipe liner epoxy resin Download PDFInfo
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- CN109290157A CN109290157A CN201811069790.3A CN201811069790A CN109290157A CN 109290157 A CN109290157 A CN 109290157A CN 201811069790 A CN201811069790 A CN 201811069790A CN 109290157 A CN109290157 A CN 109290157A
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- liner
- iron pipe
- ductile iron
- parts
- spray coating
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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
- B05D7/22—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 internal surfaces, e.g. of tubes
- B05D7/222—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 internal surfaces, e.g. of tubes of pipes
-
- 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
-
- 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
- B05D3/0254—After-treatment
-
- 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
- B05D3/06—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 exposure to radiation
- B05D3/061—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 exposure to radiation using U.V.
- B05D3/065—After-treatment
- B05D3/067—Curing or cross-linking the coating
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- 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
-
- 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
- B05D2504/00—Epoxy polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
Abstract
Needle of the present invention proposes a kind of production technology of ductile iron pipe liner epoxy resin, and its step are as follows: (1) pre-processing；(2) liner makes；1. precast linings spray coating liquor；2. liner spray coating liquor is once sprayed on the inner wall of ductile iron pipe；3. carrying out one-step solidification processing to liner spray coating liquor；4. being sprayed into liner spray coating liquor is secondary on the inner wall of ductile iron pipe；5. carrying out secondary curing processing to liner spray coating liquor；6. liner spray coating liquor is sprayed into three times on the inner wall of ductile iron pipe；7. carrying out curing process three times to liner spray coating liquor.Present invention process is simple, easy to operate, reduces costs.
Description
Technical field
The present invention relates to a kind of production technology, in particular to a kind of production technology of ductile iron pipe liner epoxy resin.
Background technique
Existing plain cast iron pipe is often used as water supply aqueduct because of its preferable comprehensive performance, in order to solve cast iron pipe
Anticorrosion, most common method are that cement mortar liner or epoxy resin, epoxy ceramic liner are used in cast iron pipe to be somebody's turn to do
The preferred anti-corrosion mode of class pipeline；Use cement mortar liner as drinking water aqueduct, since inner wall is rough, water flow resistance
Power is big, and easy fouling, and the reactive material that hardening of cement generates influences water quality, and thickness of inner lining is larger, reaches 3-12mm, emptying effectiveness
Lower, cement lining causes entire tube body weight to increase, and is unfavorable for construction and installation, and cement lining processing is inconvenient, attachment
Power is poor, and the impact and pipe deformations during construction and installation be easy to cause cement to fall off, and cement lining remains many to be resolved
Difficult point, so the liner mode that cement lining has not been, is unable to get commonly used.
Summary of the invention
The present invention proposes a kind of production technology of ductile iron pipe liner epoxy resin, technique letter regarding to the issue above
It is single, it is easy to operate, it reduces costs.
Specific technical solution is as follows:
A kind of production technology of ductile iron pipe liner epoxy resin, its step are as follows:
(1) it pre-processes:
1. being polished, being derusted by inner wall of the grinding wheel to ductile iron pipe, scale removal, Cast Iron Surface slag blanket；
2. preheating to ductile iron pipe, preheating temperature is 40-55 DEG C；
(2) liner makes
1. precast linings spray coating liquor；
2. liner spray coating liquor is once sprayed on the inner wall of ductile iron pipe, coating thickness 0.1-0.3mm；
3. carrying out one-step solidification processing to liner spray coating liquor, curing process is that ultraviolet light solidifies and is heating and curing while carrying out, one
Secondary cured temperature is 70-90 DEG C；
4. being sprayed into liner spray coating liquor is secondary on the inner wall of ductile iron pipe, coating thickness 0.2-0.5mm；
5. carrying out secondary curing processing to liner spray coating liquor, curing process is that ultraviolet light solidifies and is heating and curing while carrying out, two
Secondary cured temperature is 80-100 DEG C；
6. liner spray coating liquor is sprayed into three times on the inner wall of ductile iron pipe, coating thickness 0.1-0.2mm；
7. carrying out curing process three times to liner spray coating liquor, curing process is that ultraviolet light solidifies and is heating and curing while carrying out, three
Secondary cured temperature is 60-70 DEG C.
Further, in step (2), one-step solidification, secondary curing are identical with the cured time three times.
Further, the constituent of liner spray coating liquor includes: according to parts by weight
80-150 parts of aqueous epoxy resins,
10-15 parts of aluminum oxide,
1-5 parts of silicon carbide,
2-6 parts of polyvinyl chloride,
8-16 parts of 1- hydroxycyclohexyl phenyl ketone,
3-12 parts of thio-2 acid,
3-12 parts of o-phthalaldehyde,
10-16 parts of acetone,
5-10 parts of titanium dioxide.
Further, liner spray coating liquor the preparation method comprises the following steps:
After stirring is mixed in each constituent by above-mentioned parts by weight；In whipping process, continue as leading in stirred tank
Enter nitrogen.
Further, the liner production of step (2) is completed by spray equipment.
Further, spray equipment includes pedestal, and pedestal is equipped with clamping device, spraying mechanism and drying mechanism；
Clamping device includes two clamp assemblies and a transmission component；
Two clamp assemblies are oppositely arranged, and clamp assemblies include Holding seat, and Holding seat is fixed on the base, on Holding seat
Equipped with snap ring, snap ring is cirque structure, is equipped with the first clamping opening at the top of snap ring, circumferentially shape distribution on the inner wall of snap ring
Equipped with multiple balls, for connecting and fixing ductile iron pipe, ductile iron pipe is in contact snap ring with ball, makes ductile iron pipe can
It is rotated on clamp assemblies；
Transmission component includes transmission fixed ring, and transmission fixed ring includes the transmission fixing card of two semicircular structures, two transmissions
Fixing card mutually splices and is locked to form the transmission fixed ring of cirque structure by screw bolt and nut, and transmission is fixed
The outer wall of ring is equipped with rack gear；
Transmission fixed ring interference fit is fixed on the outer wall of ductile iron pipe, and is driven fixed ring and is passed through synchronous belt and fixation
Synchronous pulley in first motor realizes linkage, and first motor is fixed on the base, and first motor drives transmission fixed ring to turn
It moves that ductile iron pipe is driven to rotate；
Spraying mechanism and drying mechanism are separately positioned on the two sides of clamping device；
Spraying mechanism includes the first front support frame and the first rear support frame, and the first front support frame is detachably mounted to by screw
On pedestal, the first front support frame is equipped with first passage, the setting of the first front support frame clamping device and the first rear support frame it
Between；
Horizontal on first rear support frame to fix a drive rod, drive rod and ductile iron pipe are coaxially disposed, drive rod and folder
The close one end of mechanism is held across first passage and which is provided with spray head, spray head is equipped with spray orifice, and drive rod is remote with clamping device
From one end be fixed on the first rear support frame；
Spraying mechanism further includes the first lead screw and the second motor, and the first lead screw is rotatably fixed on pedestal by the first fixing seat
On, what the first rear support frame was threadedly engaged is set on the first lead screw, and a first gear is fixed in the end of the first lead screw, and first
Gear is meshed with the second gear being fixed on the second motor, and the second motor is fixed on the base, and the second motor drives first
Lead screw rotation, is horizontally moved the first rear support frame along the first lead screw, to realize spray head into or out of spheroidal graphite cast-iron
Pipe；
Drying mechanism includes the second front support frame and the second rear support frame, and the second front support frame is detachably mounted to by screw
On pedestal, the second front support frame is equipped with second channel, the setting of the second front support frame the second rear support frame and clamping device it
Between；
A drying mechanism shell is fixed on second rear support frame, is equipped with drying cavity open at one end in drying mechanism shell, is dried
The open end of dry chamber is drying mechanism shell and the close one end of clamping device, and the internal diameter of drying cavity is greater than the outer of ductile iron pipe
Diameter makes drying mechanism shell that can be set in the outside of ductile iron pipe, and the bottom of drying cavity is equipped with the second open slot；In drying cavity
It is horizontal to be equipped with ultraviolet tube, multiple heaters are equipped at circle-shaped distribution on the inner wall of drying cavity；
Drying mechanism shell and the close one end of clamping device pass through the second channel of the second front support frame, drying mechanism shell with
The separate one end of clamping device is fixed on the first rear support frame；
Drying mechanism further includes the second lead screw and third motor, and the second lead screw is rotatably fixed on pedestal by the second fixing seat
On, what the second rear support frame was threadedly engaged is set on the second lead screw, and a third gear, third are fixed in the end of the second lead screw
Gear is meshed with the 4th gear being fixed on third motor, and third motor is fixed on the base, and third motor drives second
Lead screw rotation, is horizontally moved the second rear support frame along the second lead screw, to realize spray head into or out of spheroidal graphite cast-iron
Pipe.
Further, transmission fixed ring is fixed among two snap rings.
Further, spray head is cylindrical structure, and circumferentially shape is arranged on the side wall of spray head spray orifice, and conveyance conduit is worn
It crosses drive rod to be connected with spray head, conveyance conduit conveys spray coating liquor to spray head, and spray coating liquor is sprayed by spray orifice.
Further, the internal diameter of drying cavity is at least twice of spheroidal graphite cast-iron pipe outside diameter.
Further, ultraviolet tube is auxiliarily fixed in drying cavity by tube stand.
The application method of spray equipment are as follows:
(1) ductile iron pipe is caught in the snap ring of clamp assemblies, transmission fixed ring is fixed on ductile iron pipe, and is passed through
Synchronous belt makes transmission fixed ring be connected with synchronous pulley；
(2) when original state, the spray head of spraying mechanism and the drying cavity of drying mechanism are respectively positioned on the outside of ductile iron pipe；
(3) start the second motor, spray head is made to move into the end of the other end of graphite cast iron pipe, conveyed by conveyance conduit to spray head
Spray coating liquor, spray coating liquor are ejected on the inner wall of graphite cast iron pipe by spray orifice, and at the same time, first motor and the second motor are simultaneously
Starting, while rotating graphite cast iron pipe, spray head gradually removes graphite cast iron pipe, completes to spray for the first time；
(4) after spray head removes graphite cast iron pipe, stop spraying spray coating liquor, while third electric motor starting, drying mechanism shell is to stone
Graphite cast iron pipe is mobile, makes in ultraviolet tube insertion graphite cast iron pipe and drying mechanism shell is set on graphite cast iron pipe, lead to
It crosses ultraviolet tube and electric heater carries out curing operation to spray coating liquor simultaneously；
(5) drying mechanism shell is moved to cover all graphite cast iron pipe after, stop 10-60min after, reverse movement reset,
It completes to dry for the first time；
(6) step (3) (4) are repeated (5) 3 times.
The invention has the benefit that
(1) present invention process is simple, easy to operate, reduces costs, and by the production of liner, increases the anti-corrosion of graphite cast tube
Wear-resisting performance；
(2) present invention synchronizes the spraying and drying operation realized to ductile iron pipe inner wall, automation behaviour by spray equipment
Make, work is convenient, and spraying effect is good, improves work efficiency.
Detailed description of the invention
Fig. 1 is spray equipment structure chart.
Fig. 2 is snap ring radial cross-section.
Fig. 3 is drying mechanism axial sectional view.
Fig. 4 is drying mechanism radial cross-section.
Fig. 5 is clamping device structure chart.
Specific embodiment
Clear to be more clear technical solution of the present invention, the present invention is described further with reference to the accompanying drawing,
The technical characteristic of any pair of technical solution of the present invention carries out the scheme that equivalencing is obtained with conventional reasoning and each falls within guarantor of the present invention
Protect range.
Appended drawing reference
Pedestal 1, clamp assemblies 2, Holding seat 3, the clamping of snap ring 4, first opening 5, ball 6, ductile iron pipe 7, transmission are fixed
It is propped up after ring 8, transmission fixing card 9, rack gear 10, synchronous belt 11, first motor 12, synchronous pulley 13, the first front support frame 14, first
Support 15, drive rod 16, spray head 17, the first lead screw 18, the second motor 19, the first fixing seat 20, first gear 21, second gear
22, the second front support frame 23, the second rear support frame 24, second channel 25, drying mechanism shell 26, drying cavity 27, second are open
Slot 28, ultraviolet tube 29, heater 30, the second lead screw 31, third motor 32, the second fixing seat 33, third gear the 34, the 4th
Gear 35, tube stand 36.
Embodiment one
A kind of production technology of ductile iron pipe liner epoxy resin, its step are as follows:
(2) it pre-processes:
1. being polished, being derusted by inner wall of the grinding wheel to ductile iron pipe, scale removal, Cast Iron Surface slag blanket；
2. preheating to ductile iron pipe, preheating temperature is 50 DEG C, preheating time 10-20min；
(2) liner makes
1. precast linings spray coating liquor；
2. liner spray coating liquor is once sprayed on the inner wall of ductile iron pipe, coating thickness 0.2mm；
3. carrying out one-step solidification processing to liner spray coating liquor, curing process is that ultraviolet light solidifies and is heating and curing while carrying out, one
Secondary cured temperature is 80 DEG C；
4. being sprayed into liner spray coating liquor is secondary on the inner wall of ductile iron pipe, coating thickness 0.4mm；
5. carrying out secondary curing processing to liner spray coating liquor, curing process is that ultraviolet light solidifies and is heating and curing while carrying out, two
Secondary cured temperature is 90 DEG C；
6. liner spray coating liquor is sprayed into three times on the inner wall of ductile iron pipe, coating thickness 0.2mm；
7. carrying out curing process three times to liner spray coating liquor, curing process is that ultraviolet light solidifies and is heating and curing while carrying out, three
Secondary cured temperature is 70 DEG C.
Further, in step (2), it is 40min that one-step solidification, secondary curing are identical with the cured time three times.
Further, the constituent of liner spray coating liquor includes: according to parts by weight
100 parts of aqueous epoxy resins, 12 parts of aluminum oxide, 3 parts of silicon carbide, 4 parts of polyvinyl chloride, 1- hydroxycyclohexylphenyl first
12 parts of ketone, 8 parts of thio-2 acid, 8 parts of o-phthalaldehyde, 13 parts of acetone, 8 parts of titanium dioxide.
Further, liner spray coating liquor the preparation method comprises the following steps:
After stirring is mixed in each constituent by above-mentioned parts by weight；In whipping process, continue as leading in stirred tank
Enter nitrogen.
Further, the liner production of step (2) is completed by spray equipment.
Spray equipment as shown in the figure, including pedestal 1, pedestal are equipped with clamping device, spraying mechanism and drying mechanism；
Clamping device includes two clamp assemblies 2 and a transmission component；
Two clamp assemblies are oppositely arranged, and clamp assemblies include Holding seat 3, and Holding seat is fixed on the base, Holding seat
It is equipped with snap ring 4, snap ring is cirque structure, is equipped with the first clamping opening 5 at the top of snap ring, circumferentially shape point on the inner wall of snap ring
Cloth is equipped with multiple balls 6, and for connecting and fixing ductile iron pipe 7, ductile iron pipe is in contact snap ring with ball, casts spheroidal graphite
Iron pipe can be rotated on clamp assemblies；
Transmission component includes transmission fixed ring 8, and transmission fixed ring includes the transmission fixing card 9 of two semicircular structures, two biographies
Dynamic fixing card mutually splices and is locked to form the transmission fixed ring of cirque structure by screw bolt and nut, and transmission is solid
The outer wall for determining ring is equipped with rack gear 10；
It is driven being fixed on the outer wall of ductile iron pipe for fixed ring interference fit, and transmission fixed ring is by synchronous belt 11 and admittedly
The synchronous pulley 13 being scheduled in first motor 12 realizes linkage, and first motor is fixed on the base, and first motor drives transmission solid
Ring rotation is determined to drive ductile iron pipe to rotate；
Spraying mechanism and drying mechanism are separately positioned on the two sides of clamping device；
Spraying mechanism includes the first front support frame 14 and the first rear support frame 15, and the first front support frame is removably solid by screw
Fixed the first front support frame is equipped with first passage on the base, and the first front support frame is arranged in clamping device and the first rear support
Between frame；
Horizontal on first rear support frame to fix a drive rod 16, drive rod and ductile iron pipe are coaxially disposed, drive rod with
The close one end of clamping device passes through first passage and which is provided with spray head 17, and spray head is equipped with spray orifice, drive rod and clamping machine
The separate one end of structure is fixed on the first rear support frame；
Spraying mechanism further includes the first lead screw 18 and the second motor 19, and the first lead screw is rotatably fixed by the first fixing seat 20
On the base, what the first rear support frame was threadedly engaged is set on the first lead screw, and first tooth is fixed in the end of the first lead screw
Wheel 21, first gear is meshed with the second gear 22 being fixed on the second motor, and the second motor is fixed on the base, the second electricity
Machine drives the rotation of the first lead screw, is horizontally moved the first rear support frame along the first lead screw, to realize that spray head enters or moves
Ductile iron pipe out；
Drying mechanism includes the second front support frame 23 and the second rear support frame 24, and the second front support frame is removably solid by screw
Fixed the second front support frame is equipped with second channel 25 on the base, and the second front support frame is arranged in the second rear support frame and clamping
Between mechanism；
A drying mechanism shell 26 is fixed on second rear support frame, is equipped with drying cavity open at one end in drying mechanism shell
27, the open end of drying cavity is drying mechanism shell and the close one end of clamping device, and the internal diameter of drying cavity is greater than spheroidal graphite cast-iron
The outer diameter of pipe makes drying mechanism shell that can be set in the outside of ductile iron pipe, and the bottom of drying cavity is equipped with the second open slot 28；
It is horizontal in drying cavity to be equipped with ultraviolet tube 29, multiple heaters 30 are equipped at circle-shaped distribution on the inner wall of drying cavity；
Drying mechanism shell and the close one end of clamping device pass through the second channel of the second front support frame, drying mechanism shell with
The separate one end of clamping device is fixed on the first rear support frame；
Drying mechanism further includes the second lead screw 31 and third motor 32, and the second lead screw is rotatably fixed by the second fixing seat 33
On the base, what the second rear support frame was threadedly engaged is set on the second lead screw, and a third tooth is fixed in the end of the second lead screw
Wheel 34, third gear is meshed with the 4th gear 35 being fixed on third motor, and third motor is fixed on the base, third electricity
Machine drives the rotation of the second lead screw, is horizontally moved the second rear support frame along the second lead screw, to realize that spray head enters or moves
Ductile iron pipe out.
Further, transmission fixed ring is fixed among two snap rings.
Further, spray head is cylindrical structure, and circumferentially shape is arranged on the side wall of spray head spray orifice, and conveyance conduit is worn
It crosses drive rod to be connected with spray head, conveyance conduit conveys spray coating liquor to spray head, and spray coating liquor is sprayed by spray orifice.
Further, the internal diameter of drying cavity is at least twice of spheroidal graphite cast-iron pipe outside diameter.
Further, ultraviolet tube is auxiliarily fixed in drying cavity by tube stand 36.
The application method of spray equipment are as follows:
(1) ductile iron pipe is caught in the snap ring of clamp assemblies, transmission fixed ring is fixed on ductile iron pipe, and is passed through
Synchronous belt makes transmission fixed ring be connected with synchronous pulley；
(2) when original state, the spray head of spraying mechanism and the drying cavity of drying mechanism are respectively positioned on the outside of ductile iron pipe；
(3) start the second motor, spray head is made to move into the end of the other end of graphite cast iron pipe, conveyed by conveyance conduit to spray head
Spray coating liquor, spray coating liquor are ejected on the inner wall of graphite cast iron pipe by spray orifice, and at the same time, first motor and the second motor are simultaneously
Starting, while rotating graphite cast iron pipe, spray head gradually removes graphite cast iron pipe, completes to spray for the first time；
(4) after spray head removes graphite cast iron pipe, stop spraying spray coating liquor, while third electric motor starting, drying mechanism shell is to stone
Graphite cast iron pipe is mobile, makes in ultraviolet tube insertion graphite cast iron pipe and drying mechanism shell is set on graphite cast iron pipe, lead to
It crosses ultraviolet tube and electric heater carries out curing operation to spray coating liquor simultaneously；
(5) drying mechanism shell is moved to cover all graphite cast iron pipe after, stop 40min after, reverse movement reset, complete
It dries for the first time；
(6) step (3) (4) are repeated (5) 3 times.
Embodiment two
With a kind of production technology of ductile iron pipe liner epoxy resin described in embodiment one, the difference is that, liner
The constituent of spray coating liquor includes: according to parts by weight
80 parts of aqueous epoxy resins, 10 parts of aluminum oxide, 1 part of silicon carbide, 2 parts of polyvinyl chloride, 1- hydroxycyclohexylphenyl first
8 parts of ketone, 3 parts of thio-2 acid, 3 parts of o-phthalaldehyde, 10 parts of acetone, 5 parts of titanium dioxide.
Embodiment three
With a kind of production technology of ductile iron pipe liner epoxy resin described in embodiment one, the difference is that, liner
The constituent of spray coating liquor includes: according to parts by weight
150 parts of aqueous epoxy resins, 15 parts of aluminum oxide, 5 parts of silicon carbide, 6 parts of polyvinyl chloride, 1- hydroxycyclohexylphenyl first
16 parts of ketone, 12 parts of thio-2 acid, 12 parts of o-phthalaldehyde, 16 parts of acetone, 10 parts of titanium dioxide.
Claims (5)
1. a kind of production technology of ductile iron pipe liner epoxy resin, it is characterized in that, its step are as follows:
Pretreatment:
1. being polished, being derusted by inner wall of the grinding wheel to ductile iron pipe, scale removal, Cast Iron Surface slag blanket；
2. preheating to ductile iron pipe, preheating temperature is 40-55 DEG C；
(2) liner makes
1. precast linings spray coating liquor；
2. liner spray coating liquor is once sprayed on the inner wall of ductile iron pipe, coating thickness 0.1-0.3mm；
3. carrying out one-step solidification processing to liner spray coating liquor, curing process is that ultraviolet light solidifies and is heating and curing while carrying out, one
Secondary cured temperature is 70-90 DEG C；
4. being sprayed into liner spray coating liquor is secondary on the inner wall of ductile iron pipe, coating thickness 0.2-0.5mm；
5. carrying out secondary curing processing to liner spray coating liquor, curing process is that ultraviolet light solidifies and is heating and curing while carrying out, two
Secondary cured temperature is 80-100 DEG C；
6. liner spray coating liquor is sprayed into three times on the inner wall of ductile iron pipe, coating thickness 0.1-0.2mm；
7. carrying out curing process three times to liner spray coating liquor, curing process is that ultraviolet light solidifies and is heating and curing while carrying out, three
Secondary cured temperature is 60-70 DEG C.
2. a kind of production technology of ductile iron pipe liner epoxy resin as described in claim 1, it is characterized in that, in step
(2) in, one-step solidification, secondary curing are identical with the cured time three times.
3. a kind of production technology of ductile iron pipe liner epoxy resin as described in claim 1, it is characterized in that, liner spraying
The constituent of liquid includes: according to parts by weight
80-150 parts of aqueous epoxy resins,
10-15 parts of aluminum oxide,
1-5 parts of silicon carbide,
2-6 parts of polyvinyl chloride,
8-16 parts of 1- hydroxycyclohexyl phenyl ketone,
3-12 parts of thio-2 acid,
3-12 parts of o-phthalaldehyde,
10-16 parts of acetone,
5-10 parts of titanium dioxide.
4. a kind of production technology of ductile iron pipe liner epoxy resin as described in claim 1, it is characterized in that, liner spraying
Liquid the preparation method comprises the following steps:
After stirring is mixed in each constituent by above-mentioned parts by weight；In whipping process, continue as leading in stirred tank
Enter nitrogen.
5. a kind of production technology of ductile iron pipe liner epoxy resin as described in claim 1, it is characterized in that, step (2)
Liner production by spray equipment completion.
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| CN114101007A (en) * | 2021-11-30 | 2022-03-01 | 国铭铸管股份有限公司 | Method for reducing lining cracks of nodular cast iron pipe |
| CN115789483A (en) * | 2022-10-12 | 2023-03-14 | 河南焓之悦新材料有限公司 | Device for filling lubricant |
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