CN216605942U - Turbulent tube type cooling device for epoxy coating steel bar production - Google Patents
Turbulent tube type cooling device for epoxy coating steel bar production Download PDFInfo
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- CN216605942U CN216605942U CN202122609699.XU CN202122609699U CN216605942U CN 216605942 U CN216605942 U CN 216605942U CN 202122609699 U CN202122609699 U CN 202122609699U CN 216605942 U CN216605942 U CN 216605942U
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Abstract
The utility model discloses a turbulent tube type cooling device for epoxy coating steel bar production, which is characterized in that at least 3 cooling sections, namely a high-temperature zone, a medium-temperature zone and a low-temperature zone, are arranged between the coating solidification and the packing and warehousing, wherein the high-temperature zone, the medium-temperature zone and the low-temperature zone respectively adopt the turbulent tube type cooling device, so that the coated steel bar is cooled step by step and stably cooled, the phenomena of rapid shrinkage and passive tensioning of the steel bar surface coating caused by the initial quenching of the epoxy coating steel bar and the later steel bar temperature return are avoided, the problem of damage of the existing cooling process to the adhesive force of an epoxy coating is solved, the turbulent tube technology is adopted, the direct contact of cooling water and the solidified epoxy coating steel bar is also avoided, the related technical defects are prevented, and the effective reutilization of the cooling water heat energy is also realized.
Description
Technical Field
The utility model relates to a coated steel bar production cooling device, in particular to a turbulent tube type cooling device for epoxy coated steel bar production, and belongs to the technical field of coated steel bar manufacturing in the building industry.
Background
The conventional production process of the epoxy coating steel bar comprises the following steps: steel bar surface treatment → steel bar heating → electrostatic spraying → coating solidification → purified water cooling (Yangwnlie, "technical principle of epoxy resin coating steel bar-development process and domestic and foreign application conditions", "Water transportation engineering", 1999, No. 8 of 307). In the Chinese patent CN201310150992.1, the epoxy coating is directly and forcibly cooled by water after being cured, and the surface temperature of the zinc and epoxy double-coated steel bar is reduced to be below 100 ℃. The prior art considers that the existing spraying cooling mode leads to the reduction of the binding force of the coating and the steel bar body, and the uniform cooling effect is poor.
The preheating temperature of the surface of the epoxy coating steel bar can reach 275 ℃ (JG/T502-; after the rapid cooling is finished, the temperature inside the steel bar matrix is obviously higher than the temperature outside the steel bar matrix, and the temperature return phenomenon on the surface of the steel bar is caused, so that the epoxy coating on the surface of the steel bar is subjected to phase change and secondary heating and the steel bar matrix expands to form external stress, and the bonding force between the coating and the steel bar is reduced. Research on the adhesion of the epoxy coating steel bar coating by Huxu Hui (Effect of external stress on corrosion of epoxy coating steel bar) (2011, North-enhanced Master thesis) shows that the external stress destroys the combination between the coating and the matrix, so that the local coating can be desorbed, and the electrolyte solution can permeate into the desorption position, so that the corrosion resistance of the coating is reduced.
Chinese patent CN2019106711211 discloses a cooling system of a coated steel bar production line, which adopts a cooling tank immersion type mode to uniformly cool a coated steel bar, namely, the upper surface design of a conveying roller when the coated steel bar on the steel bar production line starts to be cooled after being solidified is positioned below the water level line of the cooling tank, and the coated steel bar conveying roller is immersed in water when being conveyed, so that a better uniform cooling effect is expected. However, the cooling system is complex in design and difficult to implement, and the epoxy coating steel bar still has obvious technical defects of rapid cooling, temperature return after cooling and the like in cooling, and in addition, the direct contact of cooling water and the epoxy coating steel bar not only brings technical problems, but also has hidden danger of water resource waste.
CN201611253516.2 ' production process of a coated steel bar for corrosion-resistant reinforced concrete ', proposes ways of water cooling, air cooling or natural cooling, and does not explain the concrete way of air cooling or natural cooling, the steel bar generally has a diameter of 5 mm-50 mm (GB/T20065- & lthelical steel bar for prestressed concrete ') (GB/T20065- & lt2016 & gt), according to the conventional air cooling or natural cooling way, even if the temperature is reduced from 140 ℃ -160 ℃ to 40 ℃ or below 100 ℃, long time (such as about 1 hour) is needed, online cooling can not be realized, and the scattered placement occupies large space, if packaging or stacking is carried out, the cooling time is prolonged, and the epoxy coating is easily damaged, in addition, the epoxy coating is easily subjected to thermal aging under continuous high temperature, and the physical and chemical properties of the coating are reduced.
Disclosure of Invention
The utility model aims to solve the technical problems in the production of epoxy coating steel bars, and provides a turbulent tube type cooling device for the production of epoxy coating steel bars, which aims to solve the technical problems in the production of epoxy coating steel bars, and aims to provide a turbulent tube type cooling device for the production of epoxy coating steel bars, realize that a cooling medium is not directly contacted with an epoxy coating, achieve the gradual and stable cooling effect, reduce the surface temperature of the epoxy coating steel bars to be 40 ℃ or below, and reduce or even avoid the temperature return phenomenon. The cooling device is simple in technology and form, is matched with the epoxy coating steel bar and a production line thereof, and effectively ensures the quality performance of the epoxy coating of the steel bar.
The utility model is realized by the following technical scheme: the utility model provides an epoxy coating reinforcing bar production is with torrent tubular cooling device, the production step of epoxy coating reinforcing bar is: cleaning the surface of the steel bar → preheating the steel bar → electrostatic spraying → curing the coating → cooling → packing and warehousing, including running a support roller on the steel bar; an electrostatic spraying area, a coating curing area, a high-temperature area, a medium-temperature area, a low-temperature area and a packaging area are sequentially arranged above the steel bar running support roller from an initial section;
the high-temperature area, the medium-temperature area and the low-temperature area are used for cooling the epoxy coating steel bar; the high-temperature area, the middle-temperature area and the low-temperature area are respectively formed by a plurality of turbulent tubes which are arranged in parallel;
the middle of the turbulent flow tube is of a hollow structure, and the side walls at the two ends are respectively provided with a cooling water outlet pipe and a cooling water inlet pipe.
The utility model relates to a preferred scheme of a turbulent tube type cooling device for producing epoxy coating reinforcing steel bars, which comprises the following steps: the cooling water outlet pipe and the cooling water inlet pipe are positioned on the upper side and the lower side of the turbulent pipe.
The utility model relates to a preferred scheme of a turbulent tube type cooling device for producing epoxy coating reinforcing steel bars, which comprises the following steps: the water flow direction in the turbulent pipe is opposite to the moving direction of the epoxy coating reinforcing steel bars.
The utility model relates to a preferred scheme of a turbulent tube type cooling device for producing epoxy coating reinforcing steel bars, which comprises the following steps: the high-temperature area, the medium-temperature area and the low-temperature area are respectively provided with a high-temperature area water storage tank, a medium-temperature area water storage tank and a low-temperature area water storage tank which recycle cooling water;
electric heaters are respectively arranged in the high-temperature area water storage tank and the medium-temperature area water storage tank, and the temperature can be heated when the temperature of cooling water is lower;
the water storage tank of the middle temperature area and the water storage tank of the low temperature area are internally provided with cold air pipes of industrial refrigerators, and the temperature of the cold air can be reduced when the temperature of the cold air is higher.
The utility model relates to a preferred scheme of a turbulent tube type cooling device for producing epoxy coating reinforcing steel bars, which comprises the following steps: the cooling water used in the high-temperature area, the medium-temperature area and the low-temperature area is stored in a shared water storage tank; the common water storage tank is externally connected with a tap water pipe.
The turbulent flow tubes correspond to the epoxy coating reinforcing steel bars on the production line one by one, and each turbulent flow tube is provided with a cooling water inlet and a cooling water outlet.
The cooling water in the high-temperature area, the medium-temperature area and the low-temperature area is provided with independent water storage tanks and realizes water circulation; the water storage tanks are all provided with electric heaters, wherein the tank inside the water storage tanks of the high-temperature region and the medium-temperature region is designed into a comprehensive temperature control regulation mode of heating by electric heating pipes and supplementing normal-temperature tap water for cooling, cold air pipes of an industrial refrigerator are also distributed in the tank inside the water storage tank of the medium-temperature region, and the temperature is regulated and controlled when the water temperature of the medium-temperature region is overhigh; the water storage tank of the low temperature zone is internally distributed with a temperature control adjusting mode of cooling a cold air pipe of an industrial refrigerator and supplementing normal temperature tap water. The electric heater of the water storage tank in the middle temperature area is also provided with a cold air pipe of an industrial refrigerator for adjusting and controlling the temperature when the water temperature of the middle temperature area is too high.
The temperature of the cooling water of the water storage tank in the high temperature area is controlled to be 30-40 ℃, the temperature of the cooling water of the water storage tank in the middle temperature area is controlled to be 20-30 ℃, the temperature of the cooling water of the water storage tank in the low temperature area is not more than 20 ℃, and because the epoxy coating steel bar passes through the turbulent pipe, an air layer is arranged between the surface of the epoxy coating steel bar and the turbulent pipe, the temperature of the cooling water is properly reduced, and the cooling effect of the turbulent pipe is ensured.
The cooling water of the high-temperature area, the medium-temperature area and the low-temperature area can be designed to share a water storage tank, an electric heater and a temperature control regulation mode of cooling a cold air pipe of an industrial refrigerator and supplementing normal-temperature tap water are simultaneously distributed in the tank of the water storage tank, wherein the cooling water enters from a water inlet of a low-temperature area turbulent pipe, directly enters a water inlet of a medium-temperature area turbulent pipe after going out along a water outlet of the low-temperature area turbulent pipe, then directly enters a water inlet of the high-temperature area turbulent pipe after going out along a water outlet of the medium-temperature area turbulent pipe, and finally flows back to the shared water storage tank after going out along a water outlet of the high-temperature area turbulent pipe. The cooling water which is discharged along the water outlet of the turbulent pipe in the high-temperature area can also be designed not to flow back to the common water storage tank but enter other water storage tanks, and can be reused for bathing of enterprise personnel, office and residential heating and the like.
The utility model has the beneficial effects that: the utility model aims at the cooling mode of the existing production line of epoxy coating reinforcing steel bars and the technical problems thereof, adopts a turbulent tube cooling technology, adopts a high, medium and low graded gradual cooling mode for the cured epoxy coating reinforcing steel bars, leads the coating reinforcing steel bars to be cooled step by step and stably cooled, avoids the phenomena of rapid shrinkage and passive tension of the coating on the surface of the reinforcing steel bars caused by the rapid cooling of the epoxy coating reinforcing steel bars at the initial stage and the temperature return of the reinforcing steel bars at the later stage, also avoids the direct contact of cooling water with the epoxy coating during curing, and has the product detection result that the performances such as the coating adhesive force of the epoxy coating reinforcing steel bars produced by the utility model are obviously improved, the utility model solves the problem of the damage of the epoxy coating adhesive force of the existing cooling technology, simultaneously adopts the turbulent tube technology, avoids the direct contact of the cooling water with the cured epoxy coating reinforcing steel bars, not only prevents the related technical defects, but also reduces the waste of water resources, and the cooling water heat energy is effectively reused, and the method has good economic and social benefits.
Drawings
FIG. 1 is a schematic view of the overall arrangement of the present invention;
FIG. 2 is a partial structural view of the high temperature zone of the present invention;
FIG. 3 is a schematic view of a single turbulence pipe structure of the present invention;
FIG. 4 is a schematic view of the structure of the high temperature zone, the medium temperature zone and the low temperature zone and the shared water storage tank;
in the figure: 1-electrostatic spraying area; 2-a coating curing zone; 3-high temperature zone; 4-medium temperature zone; 5-low temperature zone; 6-a packing area; 7-running a supporting roller on the steel bar; 8-a water storage tank in a high-temperature area; 9-epoxy coating steel bars; 10-a water storage tank in a medium temperature area; 11-a low-temperature area water storage tank; 12-a cooling water outlet pipe; 13-cooling water inlet pipe; 14-an electric heater; 15-a turbulence pipe; 16-shared water storage tank; 17-cold air pipe.
Detailed Description
The embodiments and effects of the present invention will be further illustrated with reference to the following examples.
Example 1
A cooling device for producing epoxy coating reinforcing steel bars is shown in figure 1, and the production method of the epoxy coating reinforcing steel bars comprises the following steps:
steel bar surface cleaning treatment → steel bar preheating → electrostatic spraying area 1 spraying → coating curing area 2 curing → high temperature area 3 turbulent tube cooling → medium temperature area 4 turbulent tube cooling → low temperature area 5 turbulent tube cooling → packing area 6 packing and warehousing.
The turbulence pipes 15 correspond to the epoxy coating reinforcing steel bars 9 on the production line one by one.
Example 2
A cooling device for producing epoxy coating steel bars is shown in figures 1, 2 and 3, and the production method of the epoxy coating steel bars comprises the following steps: steel bar surface cleaning treatment → steel bar preheating → electrostatic spraying area 1 spraying → coating curing area 2 curing → high temperature area 3 turbulent tube cooling → medium temperature area 4 turbulent tube cooling → low temperature area 5 turbulent tube cooling → packing area 6 packing and warehousing.
The epoxy coating reinforcing steel bars 9 move forwards along the reinforcing steel bar running supporting roller 7 on the production line, and enter the high-temperature zone 3 turbulent tube for cooling after being solidified.
The turbulent tubes 15 are arranged in rows, the turbulent tubes 15 correspond to the epoxy coating reinforcing steel bars 2 on the production line one by one, and each turbulent tube is provided with a cooling water inlet 13 and a cooling water outlet 12.
The high temperature zone 3 adopts cooling water with the temperature of 30-40 ℃, the cooling water is arranged in a water storage tank 8 of the high temperature zone, an electric heater 14 is arranged in the water storage tank, and the comprehensive temperature control is realized by adopting a mode of heating by an electric heating pipe and supplementing normal-temperature tap water cooling. When the production line of the high-temperature area 3 is cooled, cooling water enters the turbulent pipe 15 from the cooling water inlet 13 and then flows out of the cooling water outlet 12 and returns to the water storage tank 8 of the high-temperature area; then the epoxy coating reinforcing steel bars 9 enter the medium temperature region 4, the cooling working mode of the turbulent tube in the medium temperature region 4 is similar to that of the turbulent tube in the high temperature region 3, but a cold air tube 17 of an industrial refrigerator is arranged in the water storage tank in the medium temperature region for temperature control, and the water storage tank 10 in the medium temperature region adopts cooling water at the temperature of 20-30 ℃; then the epoxy coating reinforcing steel bars 9 enter the low-temperature area 5, the cooling working mode of the turbulent tube in the low-temperature area 5 is similar to that of the turbulent tube in the high-temperature area 3 and the medium-temperature area 4, and the water storage tank 11 in the low-temperature area adopts cooling water below 20 ℃; the water storage tanks 10 and 11 in the medium-temperature area and the low-temperature area are controlled to be low in temperature due to cooling water, so that a temperature control adjusting mode of cooling by using a cold air pipe 17 of an industrial refrigerator and supplementing normal-temperature tap water is adopted.
Example 3
A cooling device for producing epoxy coating steel bars is shown in figures 4, 2 and 3, and the production method of the epoxy coating steel bars comprises the following steps: steel bar surface cleaning treatment → steel bar preheating → electrostatic spraying area 1 spraying → coating curing area 2 curing → turbulent tube cooling in high temperature area 3 → turbulent tube cooling in medium temperature area 4 → turbulent tube cooling in low temperature area 5 → packing area 6 packing and warehousing.
The turbulent tubes 15 are arranged in rows, the turbulent tubes 15 correspond to the epoxy coating reinforcing steel bars 2 on the production line one by one, and each turbulent tube is provided with a cooling water inlet 13 and a cooling water outlet 12.
The cooling water of the high-temperature region 3, the medium-temperature region 4 and the low-temperature region 5 shares a water storage tank 16, an electric heater 14 and a cold air pipe 17 are distributed in the shared water storage tank 16, a temperature control adjusting mode of cooling by the cold air pipe of an industrial refrigerator and supplementing normal-temperature tap water is normally adopted, when the water temperature in the shared water storage tank 16 in winter is too low, the electric heater 14 is adopted to adjust the temperature, wherein the cooling water enters a turbulent pipe 15 from a low-temperature region turbulent pipe cooling water inlet 13, directly enters a medium-temperature region turbulent pipe cooling water inlet after going out along a low-temperature region turbulent pipe cooling water outlet 12, then directly enters a high-temperature region turbulent pipe cooling water inlet after going out along a medium-temperature region turbulent pipe cooling water outlet, and finally returns to the shared water storage tank 16 after going out along the high-temperature region turbulent pipe cooling water outlet.
According to the walking speed of the epoxy coating steel bar production line, the cooling water temperature of the water storage tank of the low-temperature region is controlled to be not more than 20 ℃ by controlling the cooling water temperature, the cooling water temperature and the like of the common water storage tank 16, the cooling water temperature in the turbulent flow tube of the medium-temperature region flowing through the low-temperature region is controlled to be 20-30 ℃, the cooling water temperature in the turbulent flow tube of the high-temperature region flowing at the flow rate is controlled to be 30-40 ℃, and the step-by-step and stable cooling of the epoxy coating steel bar is ensured.
Epoxy coating steel bars are produced by adopting the same type of epoxy powder coating and related production methods, and sampling is carried out to detect related technical properties, and the results are shown in table 1.
The data comparison in table 1 shows that the cooling effect of the device of the utility model is obvious under the conditions of the same production working condition but different cooling modes.
Table 1 performance test results of epoxy coated steel bars and prior art in each example
Note: the tests of the items not shown are carried out according to the requirements related to epoxy resin coated steel bars (JG/T502-2016).
Claims (5)
1. The utility model provides an epoxy coating reinforcing bar production is with torrent tubular cooling device which characterized in that: comprises a steel bar running support roller (7); an electrostatic spraying area (1), a coating curing area (2), a high-temperature area (3), a medium-temperature area (4), a low-temperature area (5) and a packing area (6) are sequentially arranged above the steel bar running support roller (7) from the initial section;
the high-temperature area (3), the medium-temperature area (4) and the low-temperature area (5) are used for cooling the epoxy coating steel bar (9); the high-temperature area (3), the medium-temperature area (4) and the low-temperature area (5) are respectively formed by a plurality of turbulent tubes (15) which are arranged in parallel;
the middle of the turbulent flow pipe (15) is of a hollow structure, and the side walls at the two ends are respectively provided with a cooling water outlet pipe (12) and a cooling water inlet pipe (13).
2. The turbulent tube type cooling device for epoxy coated steel bar production according to claim 1, wherein: the cooling water outlet pipe (12) and the cooling water inlet pipe (13) are positioned on the upper side and the lower side of the turbulent pipe (15).
3. The turbulent tube type cooling device for epoxy coated steel bar production according to claim 1, wherein: the direction of water flow in the turbulent flow pipe (15) is opposite to the moving direction of the epoxy coating reinforcing steel bar (9).
4. The turbulent tube type cooling device for epoxy coated steel bar production according to any one of claims 1-3, wherein: the high-temperature area (3), the medium-temperature area (4) and the low-temperature area (5) are respectively provided with a high-temperature area water storage tank (8), a medium-temperature area water storage tank (10) and a low-temperature area water storage tank (11) which can recycle cooling water;
the high-temperature area water storage tank (8) and the medium-temperature area water storage tank (10) are internally provided with electric heaters (14) respectively, and the medium-temperature area water storage tank (10) and the low-temperature area water storage tank (11) are internally provided with cold air pipes (17).
5. The turbulent tube type cooling device for epoxy coated steel bar production according to any one of claims 1-3, wherein: the cooling water used by the high-temperature area (3), the medium-temperature area (4) and the low-temperature area (5) is stored in a common water storage tank (16); the common water storage tank (16) is externally connected with a tap water pipe, and the common water storage tank (16) is simultaneously provided with an electric heater (14) and a cold air pipe (17).
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| CN202122609699.XU CN216605942U (en) | 2021-10-28 | 2021-10-28 | Turbulent tube type cooling device for epoxy coating steel bar production |
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| CN202122609699.XU CN216605942U (en) | 2021-10-28 | 2021-10-28 | Turbulent tube type cooling device for epoxy coating steel bar production |
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