CN111020582B - Split enameling and sintering method for enamel coil pipe and inner container - Google Patents
Split enameling and sintering method for enamel coil pipe and inner container Download PDFInfo
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- CN111020582B CN111020582B CN201911403534.8A CN201911403534A CN111020582B CN 111020582 B CN111020582 B CN 111020582B CN 201911403534 A CN201911403534 A CN 201911403534A CN 111020582 B CN111020582 B CN 111020582B
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- 238000004534 enameling Methods 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000005245 sintering Methods 0.000 title claims abstract description 29
- 210000003298 dental enamel Anatomy 0.000 title claims abstract description 27
- 239000002002 slurry Substances 0.000 claims abstract description 99
- 238000001035 drying Methods 0.000 claims abstract description 13
- 238000003466 welding Methods 0.000 claims abstract description 8
- 238000007789 sealing Methods 0.000 claims abstract description 5
- 229910000428 cobalt oxide Inorganic materials 0.000 claims description 6
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(ii) oxide Chemical compound [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 claims description 6
- 229910000480 nickel oxide Inorganic materials 0.000 claims description 6
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 claims description 6
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 5
- 239000010433 feldspar Substances 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 4
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 4
- 238000011010 flushing procedure Methods 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 238000010926 purge Methods 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 239000005995 Aluminium silicate Substances 0.000 claims description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 2
- 235000012211 aluminium silicate Nutrition 0.000 claims description 2
- 230000001174 ascending effect Effects 0.000 claims description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 2
- 238000007689 inspection Methods 0.000 claims description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 2
- 230000008569 process Effects 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 239000007788 liquid Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000001802 infusion Methods 0.000 description 4
- 238000000576 coating method Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000005488 sandblasting Methods 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000011282 treatment Methods 0.000 description 2
- 238000000498 ball milling Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002320 enamel (paints) Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 235000017550 sodium carbonate Nutrition 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23D—ENAMELLING OF, OR APPLYING A VITREOUS LAYER TO, METALS
- C23D5/00—Coating with enamels or vitreous layers
- C23D5/02—Coating with enamels or vitreous layers by wet methods
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
Abstract
The invention discloses a split enameling and sintering method of an enamel coil pipe and an inner container.A coil pipe enameling device comprises a coil pipe, wherein the coil pipe is provided with a slurry inlet and outlet pipe, the front end of the slurry inlet and outlet pipe is sealed with an upper plug, the front end of the slurry inlet pipe is sealed with an upper plug and a lower plug, and the lower plug is connected with a three-way valve and is respectively connected with a high-pressure gas source and a glaze slurry tank; when enameling, firstly, vertically placing the coil pipe, driving glaze slurry into the coil pipe by a pressure pump, and injecting the glaze slurry into the coil pipe from a slurry inlet pipe at the bottom of the coil pipe and filling the coil pipe with the glaze slurry; the glaze slurry reaches the upper plug on the side of the slurry outlet pipe, high-pressure compressed air is adopted to enter the slurry inlet of the coil pipe, so that the glaze slurry in the coil pipe is discharged from the slurry outlet, the upper plug is closed after the glaze slurry is completely discharged, and then the dried inner wall glaze slurry is sintered; and sealing the coil pipe by the upper plug and the lower plug, enameling, drying and sintering the outer surface of the coil pipe, enameling and sintering the inner container, and then assembling and welding the coil pipe and the inner container together. The invention improves the uniformity and stability of glaze slurry adhesion, and improves the enameling quality and the working efficiency.
Description
Technical Field
The invention relates to the technical field of enamel production, in particular to a split enameling and sintering method for an enamel coil pipe and an enamel liner.
Background
With the progress of the current society, energy conservation and emission reduction become important contents of the development of the current society, and the energy conservation and emission reduction become important development directions for the reasonable and effective use of various clean energy sources such as solar energy, wind energy and the like. The vast majority of people in China have abundant solar energy resources, so that the solar water tank serving as a traditional simple solar energy utilization mode is used in a wide area in China for years. The solar water tank can convert solar energy into heat energy, so that water in the liner is heated from low temperature to high temperature, and the requirement of hot water in life and production of people is met.
The existing solar water tanks all comprise inner containers and enamel coil pipes, the specification of the enamel coil pipes adopted by the water collecting and distributing tank with the capacity of 150 liters or more is phi 32 x 2 seamless steel pipes, and the length of the enamel coil pipes is between 6 and 10 meters according to the requirement of heat exchange area. After the coil pipe is formed, the weight is larger, if a one-time enameling sintering process is adopted: the coil pipe is welded on the inner container to carry out integral enameling and sintering, and the welding part is easy to deform during sintering due to the overweight of the coil pipe. The yield of the product is seriously influenced. In addition, the prior art shows that the corrosion-resistant and scale-proof problems of the coil heat exchanger can be solved by carrying out double-sided enamelling and sintering on the inner wall and the outer wall of the coil. But it is very difficult to form an enamel layer with uniform and stable thickness on the inner wall of the coil. Application No. 200710020940.7 discloses a coil pipe double-sided enamel process and a double-sided enamel coil pipe, which adopts methods such as pump pressurization, infusion and drainage, pump suction, infusion and drainage, compressed air infusion and drainage and the like to assist infusion of enamel slurry and drainage of residual slurry. However, the process flow is not explicitly described, and the method still has the problem that the inner wall of the coil is not uniformly coated.
Disclosure of Invention
In order to solve the technical problem, the invention provides a method for separately coating and sintering an enamel coil and an inner container.
The complete technical scheme of the invention comprises the following steps:
a split enameling and sintering method for an enamel coil pipe and an inner container comprises the following steps:
(1) coil pipe enameling:
the coil pipe is vertically arranged, a slurry outlet pipe is arranged above the coil pipe, a slurry inlet pipe is arranged below the coil pipe, the front end of the slurry outlet pipe is sealed with an upper plug, the front end of the slurry inlet pipe is sealed with a lower plug, the lower plug is connected with a three-way valve through a connecting pipe, the three-way valve is respectively connected with a compressed air pipe and a glaze slurry pipe, the air pipe is connected with a high-pressure air source, and the glaze slurry pipe is connected with a glaze slurry tank driven by a pump;
the upper plug can enable the slurry inlet and outlet pipe to be sealed or communicated with the outside, and the lower plug can enable the slurry inlet pipe to be sealed or communicated with the outside;
the upper plug and the slurry outlet pipe are detachable, and the lower plug and the slurry inlet pipe are detachable;
the lower plug and the connecting pipe are detachable;
firstly, vertically placing a coil pipe, enabling an upper plug and a lower plug to be in a communicated state, driving a three-way valve to enable a glaze slurry pipe to be communicated with a connecting pipe, starting a pressure pump to drive glaze slurry into the pipe, and injecting the glaze slurry into the pipe from a slurry inlet pipe at the bottom of the coil pipe and gradually ascending the inside of the coil pipe;
when the glaze slurry reaches the upper plug on the side of the slurry outlet pipe, the three-way valve is switched, high-pressure compressed air enters the slurry inlet of the coil pipe, the glaze slurry in the coil pipe continuously rises under the gas pressure and is discharged from the slurry outlet, the lower glaze slurry is replaced by the compressed air,
when no glaze slurry is discharged from the upper plug. Firstly, manually closing an upper plug, then closing a lower plug, and sealing the residual compressed air in the coil pipe;
removing the connecting pipe, drying the coil pipe to dry the glaze slurry on the inner wall of the coil pipe under certain pressure, removing the upper plug and the lower plug, and sintering the dried glaze slurry on the inner wall;
then continuously sleeving the upper plug and the lower plug and sealing the coil pipe, and enameling, drying and sintering the outer surface of the coil pipe in a conventional manner to finish the enameling and sintering of the coil pipe;
(2) inner container enameling
Enameling and sintering the inner container in a conventional mode or other modes;
(3) assembly welding assembly
And assembling and welding the coil pipe and the inner container which are qualified after the inspection.
Before the inner wall is enameled, the inner wall can be subjected to impurity and oxide layer removal by adopting the modes of acid washing, flushing, gas purging and the like.
In the step (1), the pressure of the compressed air sealed in the coil pipe is 0.3-0.6 Mpa.
The inner container enameling can be completed on an enameling machine, an initial position travel limit switch is arranged at the initial position of the enameling machine, and a slurry spraying position travel limit switch is arranged at the slurry spraying position; the initial position travel limit switch and the guniting position respectively collect swing bracket limit position signals, and the swinging of the swing bracket, the pause of any angle position, the rotation of the workpiece, and the pressing and loosening of the workpiece are controlled by a control system; the control system comprises a manual control mode and an automatic control mode.
Compared with the prior art, the invention has the advantages that: the problem of among the prior art coil pipe inner surface coat inhomogeneous easily, and move the in-process, because glaze slurry is not shaping yet, flow easily takes place on the inner wall surface, leads to glaze slurry thickness inhomogeneous is solved. The bottom pouring type is adopted to pour the glaze slip, so that the glaze slip is fully contacted with the inner wall of the coil pipe, and the pumping pressure can be changed to adapt to different working conditions. The glaze slip in the pipe is dried under a certain pressure, the flowing of the glaze slip caused by gravity or moving is reduced, the drying process is ensured, and the thickness of the glaze slip at each position of the inner wall is uniform and stable.
Drawings
FIG. 1 is a schematic view of the structure of the coil pipe enameling apparatus of the present invention.
FIG. 2 is a flow chart of the coil pipe enameling work process of the present invention.
In the figure: 1-coil pipe, 2-slurry outlet pipe, 3-slurry inlet pipe, 4-upper plug, 5-lower plug, 6-connecting pipe, 7-three-way valve, 8-compressed air pipe and 9-glaze slurry pipe.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only illustrative and are not intended to limit the present application.
The split enameling sintering method disclosed in the present invention will be schematically described below.
The invention relates to a method for separately enameling and sintering an enamel coil and an inner container, which has the basic working principle that after the coil is formed, the surface of the coil is firstly subjected to acid pickling, sand blasting, rust removing and other treatments, then the inside and the outside of the coil are respectively enameled and dried and sintered, then the semi-finished inner container is subjected to sand blasting, enamel coating, drying and sintering treatments, and finally the coil and the inner container which are qualified in enamel are assembled and welded together. Thus solving the technical problem of the production of the coil pipe arranged in the large-capacity liner of more than 150 liters. The method specifically comprises the following steps:
1. the coil pipe enameling method comprises the following steps:
as shown in figure 1, including coil pipe 1, the coil pipe is vertical to be placed, is equipped with out thick liquid pipe 2 above the coil pipe, and the below is equipped with into thick liquid pipe 3, goes out thick liquid pipe front end and seals up end cap 4, goes into thick liquid pipe front end and seals up end cap 5 down, and end cap 5 passes through connecting pipe 6 and connects three-way valve 7 down, and the three-way valve is connected compressed air pipe 8 and glaze thick liquid pipe 9 respectively. The air pipe 8 is connected with a high-pressure air source, and the glaze slurry pipe is connected with a glaze slurry tank driven by a pump.
The upper and lower plugs can seal or communicate the slurry inlet and outlet pipe with the outside, and can be realized by arranging a simple hand-operated valve at the pipe opening.
And the upper and lower plugs and the slurry inlet and outlet pipe are detachable. The lower plug and the connecting pipe are also detachable.
When enameling, the enamel slurry is vertically placed, an upper plug and a lower plug are respectively sleeved on the slurry inlet and outlet pipe, a connecting pipe and a three-way valve are inserted on the lower plug, then the upper plug and the lower plug are both in a communicated state, the three-way valve is driven to enable the enamel slurry pipe to be communicated with the connecting pipe, a pressure pump is started to drive the enamel slurry into the enamel slurry pipe, the enamel slurry is injected from the slurry inlet pipe at the bottom of the coil pipe, and the enamel slurry gradually rises in the coil pipe, as shown in figure 2.
When the glaze slurry reaches the upper plug on the slurry outlet pipe side, the three-way valve is switched, and high-pressure compressed air is adopted to enter the slurry inlet of the coil pipe, as shown in fig. 2 b. The slip in the coil continues to rise under gas pressure and is discharged from the outlet, the lower slip being replaced by compressed air, as shown in figure 2 c. When no glaze slurry is discharged from the upper plug. The upper plug is first closed manually and then the lower plug is closed. The remaining compressed air is enclosed in the coil as shown in figure 2 d.
And then, removing the connecting pipe, drying the coil pipe to dry the glaze slurry on the inner wall of the coil pipe under certain pressure, removing the upper plug and the lower plug, and sintering the dried inner wall glaze slurry.
And then continuously sleeving the upper plug and the lower plug and sealing the coil pipe, and enameling, drying and sintering the outer surface of the coil pipe in a conventional manner to finish the enameling and sintering of the coil pipe.
In addition, before the inner wall is enameled, the inner wall can be subjected to impurity and oxide layer removal by adopting the manners of acid washing, flushing, gas purging and the like, which is the conventional technology and is not described again.
In the coil pipe enameling process, the problem that the inner surface of the coil pipe is easy to be coated unevenly is considered, and meanwhile, after enameling is finished, the glaze slip is easy to flow on the surface of the inner wall because the glaze slip is not formed yet in the moving process of the coil pipe, so that part of the glaze slip is thicker, and part of the glaze slip is thinner, so that the thickness is uneven. Therefore, in the process of enameling the inner wall, the glaze slip is firstly poured in a bottom pouring mode, so that the coil pipe is filled with the glaze slip from bottom to top, the process flows very stably and can be fully contacted with the inner wall of the coil pipe, and in addition, the pumping pressure can be changed in the process so as to change the rising speed of the glaze slip. When the glaze slurry reaches the upper plug, compressed air is used to discharge the glaze slurry in the pipe, and in the process, the flow of the glaze slurry is also very stable, so that the damage to the glaze slurry coated on the inner wall can be avoided. After the residual glaze slip is completely discharged, the plug is closed, the glaze slip in the pipe is dried under certain pressure, in the carrying process, the glaze slip hung on the inner wall is under certain pressure, the flowing of the glaze slip caused by gravity or carrying can be reduced, the drying process is ensured, the thickness of the glaze slip at each position of the inner wall is uniform and stable, and in the actual production, the drying is carried out by adopting the pressure of 0.3-0.6 MPa according to the test results of different pressures, so that the effect is optimal. After drying, the inner wall glaze slip is formed, so the plug can be removed for sintering.
Further, the enamel slurry used in the present invention includes preferred embodiments including:
(1) preparing glaze slip:
the glaze slip adopted by the invention at least comprises the following raw materials: SiO 22: 52-58 parts by mass of feldspar powder: 48-50 parts by mass of boric anhydride: 18-25 parts by mass of alumina: 4-6 parts by mass, the sum of cobalt oxide and nickel oxide: 1.2-1.6 parts by mass of soda: 4-6 parts by mass of calcium carbonate: 1-3 parts by mass of kaolin: 2 to 3 parts by mass.
In the components of the glaze slip, silicon oxide and feldspar powder are used as base materials, boric anhydride and alkalis are added to serve as functional components for reducing the melting point of the base materials, and the thermal expansion coefficient of the soda ash is adjusted at the same time. As for the amount of cobalt oxide and nickel oxide, in the actual production, the addition of feldspar powder into cobalt oxide and nickel oxide can make the glaze more fusible, improve the viscosity, reduce the surface tension gradually and make the glaze more easily coated on the surface of a steel plate. After the product is detected, the addition of the cobalt oxide and the nickel oxide can form a partial microcrystalline phase after sintering, and the compressive strength is also obviously improved. Through multiple experiments on the dosage of the base component and each functional component, and comprehensive comparison of the influence on performance and cost consideration, the optimal dosage combination is finally selected, namely, the glaze component of the invention meets the following relationship, (silicon oxide + feldspar powder), (boric anhydride + soda), and (cobalt oxide + nickel oxide) ═ 100: (24 to 28) (1.4 to 1.6)
And uniformly mixing the prepared raw materials by using a ball-milling mixer, and adding deionized water to obtain the glaze slip used by the invention.
2. Inner container enameling method
The inner container and the enameling mode can adopt any existing mode. In a preferred mode, the enameling can also be carried out by adopting an enameling machine designed by the applicant, and in the preferred mode, an initial position travel limit switch is arranged at the initial position of the enameling machine, and a guniting position travel limit switch is arranged at the guniting position; the initial position travel limit switch and the guniting position respectively collect swing bracket limit position signals, and the swinging of the swing bracket, the pause of any angle position, the rotation of the workpiece, and the pressing and loosening of the workpiece are controlled by a control system; the control system comprises a manual control mode and an automatic control mode;
the method comprises the following specific steps:
(1) in a manual control mode, the pressing cylinder is lifted, and the liner is installed in place; then the compressing cylinder descends to compress the inner container, and the inner container is at an initial position and the axis of the inner container is vertical;
(2) in an automatic control mode, the main cylinder drives the swing frame to turn forwards until the swing frame touches a guniting position travel limit switch, and at the moment, the included angle between the axis of the liner and the horizontal plane is 45-55 degrees;
(3) the auxiliary motor is started to drive the inner container to rotate at a constant speed of 10-15rpm, and before the enameling operation is finished, the inner container always rotates at a constant speed;
(4) after the rotation is timed for 30 seconds, the diaphragm pump is started, the glaze slurry is driven into the inner container, the pulping time is 10 seconds, and a compressed air source is started to pressurize the inner container;
(5) the main cylinder drives the swing frame to turn backwards, the turning time is 5 seconds, and the swing frame is stopped until the inner container keeps a horizontal position;
(6) stopping overturning, after the inner container continues to rotate and is timed for 20 seconds, driving the swing frame to overturn backwards again by the main cylinder, wherein the overturning time is 5 seconds, and the swing frame stops overturning, and at the moment, the included angle between the axis of the inner container and the horizontal plane is 25-35 degrees;
(7) stopping overturning, after the inner container continues to rotate and time for 20 seconds, driving the swing frame to continue to overturn backwards by the main cylinder, wherein the overturning time is 5 seconds, and the swing frame stops overturning, and at the moment, the included angle between the axis of the inner container and the horizontal plane is 60-75 degrees;
(8) stopping overturning, after the inner container continues to rotate and is timed for 20 seconds, driving the swing frame to overturn forwards by the main cylinder, wherein the overturning time is 5 seconds, and the swing frame stops overturning, and the included angle between the axis of the inner container and the horizontal plane is 10-15 degrees;
(9) stopping overturning, after the inner container continues to rotate and is timed for 20 seconds, driving the swing frame to overturn backwards by the main cylinder until the swing frame touches the stroke limit switch at the initial position, and at the moment, the inner container is at the initial position and the axis of the inner container is vertical;
(10) the auxiliary motor is turned off after the inner container continues to rotate for 10 seconds, and the inner container stops rotating;
(11) and under a manual control mode, the pressing air cylinder is lifted, the inner container is taken down from the enameling machine and hung on a drying conveying line.
According to the enameling method, except for the initial position and the guniting position, the limit position signal is required to be acquired, the external signal is not required to be acquired when other actions are finished, and the omnibearing enameling inside the workpiece is realized by setting the time length of each action. The control system controls the workpiece to swing and pause at a preset angle relative to the control system for acquiring external signals, and avoids system control abnormity caused by external signal faults. The coating process is controlled by time in a mode of combining manual control and automatic control, and 360-degree coating without dead angles can be achieved.
3. Assembly welding assembly
And after the inner container and the coil pipe are respectively enameled and sintered and are inspected to be qualified, assembling and welding the coil pipe and the inner container together after the enamels are qualified, and finishing the split enameled and sintered process.
The above applications are only some embodiments of the present application. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the inventive concept herein, and it is intended to cover all such modifications and variations as fall within the scope of the invention.
Claims (2)
1. A split enameling and sintering method for an enamel coil pipe and an inner container is characterized in that raw materials of glaze slip adopted by enameling at least comprise the following components: SiO 22: 52-58 parts by mass of feldspar powder: 48-50 parts by mass of boric anhydride: 18-25 parts by mass of alumina: 4-6 parts by mass, the sum of cobalt oxide and nickel oxide: 1.2-1.6 parts by mass of soda: 4-6 parts by mass of calcium carbonate: 1-3 parts by mass of kaolin: 2-3 parts by mass, specifically comprising the following steps:
(1) coil pipe enameling:
the coil pipe is vertically arranged, a slurry outlet pipe is arranged above the coil pipe, a slurry inlet pipe is arranged below the coil pipe, the front end of the slurry outlet pipe is sealed with an upper plug, the front end of the slurry inlet pipe is sealed with a lower plug, the lower plug is connected with a three-way valve through a connecting pipe, the three-way valve is respectively connected with a compressed air pipe and a glaze slurry pipe, the air pipe is connected with a high-pressure air source, and the glaze slurry pipe is connected with a glaze slurry tank driven by a pump;
the upper plug can enable the slurry inlet and outlet pipe to be sealed or communicated with the outside, and the lower plug can enable the slurry inlet pipe to be sealed or communicated with the outside;
the upper plug and the slurry outlet pipe are detachable, and the lower plug and the slurry inlet pipe are detachable;
the lower plug and the connecting pipe are detachable;
firstly, vertically placing a coil pipe, enabling an upper plug and a lower plug to be in a communicated state, driving a three-way valve to enable a glaze slurry pipe to be communicated with a connecting pipe, starting a pressure pump to drive glaze slurry into the pipe, and injecting the glaze slurry into the pipe from a slurry inlet pipe at the bottom of the coil pipe and gradually ascending the inside of the coil pipe;
when the glaze slurry reaches the upper plug on the side of the slurry outlet pipe, the three-way valve is switched, high-pressure compressed air enters the slurry inlet of the coil pipe, the glaze slurry in the coil pipe continuously rises under the gas pressure and is discharged from the slurry outlet, the lower glaze slurry is replaced by the compressed air,
when no glaze slurry is discharged from the upper plug, the upper plug is manually closed, then the lower plug is closed, the residual compressed air is closed in the coil pipe, and the pressure of the compressed air closed in the coil pipe is 0.3-0.6 Mpa;
removing the connecting pipe, drying the coil pipe to dry the glaze slurry on the inner wall of the coil pipe under certain pressure, removing the upper plug and the lower plug, and sintering the dried glaze slurry on the inner wall;
then continuously sleeving the upper plug and the lower plug and sealing the coil pipe, and enameling, drying and sintering the outer surface of the coil pipe in a conventional manner to finish the enameling and sintering of the coil pipe;
(2) inner container enameling
The inner container enameling is finished on an enameling machine, an initial position travel limit switch is arranged at the initial position of the enameling machine, and a slurry spraying position travel limit switch is arranged at the slurry spraying position; the initial position travel limit switch and the guniting position respectively collect swing bracket limit position signals, and the swinging of the swing bracket, the pause of any angle position, the rotation of the workpiece, and the pressing and loosening of the workpiece are controlled by a control system; the control system comprises a manual control mode and an automatic control mode;
(3) assembly welding assembly
And assembling and welding the coil pipe and the inner container which are qualified after the inspection.
2. The method for enamel coil and liner separated enameling and sintering according to claim 1, wherein before the inner wall is enameled, the inner wall is subjected to impurity and oxide layer removal by acid washing, flushing and gas purging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911403534.8A CN111020582B (en) | 2019-12-30 | 2019-12-30 | Split enameling and sintering method for enamel coil pipe and inner container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911403534.8A CN111020582B (en) | 2019-12-30 | 2019-12-30 | Split enameling and sintering method for enamel coil pipe and inner container |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111020582A CN111020582A (en) | 2020-04-17 |
| CN111020582B true CN111020582B (en) | 2020-07-14 |
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| CN111020582A (en) | 2020-04-17 |
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Denomination of invention: A separate coating and sintering method of enamel coil and inner tank Effective date of registration: 20220331 Granted publication date: 20200714 Pledgee: Heze rural commercial bank Limited by Share Ltd. Pledgor: Shandong Haohua enamel water tank Co.,Ltd. Registration number: Y2022980003619 |
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Date of cancellation: 20231207 Granted publication date: 20200714 Pledgee: Heze rural commercial bank Limited by Share Ltd. Pledgor: Shandong Haohua enamel water tank Co.,Ltd. Registration number: Y2022980003619 |
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Effective date of registration: 20240116 Address after: 274000 Dusi Town, Mudan District, Heze City, Shandong Province Patentee after: SHANDONG HAOHUA SOLAR ENERGY CO.,LTD. Address before: 274000 200 meters east of 220 National Road, Dusi Town, Mudan District, Heze City, Shandong Province Patentee before: Shandong Haohua enamel water tank Co.,Ltd. |