CN108891005B - Cooling medium and cooling device for producing steel coil peripheral protective plate - Google Patents

Abstract

The invention belongs to the technical field of cooling mediaThe cooling medium and the cooling device for producing the steel coil peripheral protective plate comprise the following components in parts by weight: 10 parts of water, 20 parts of ethylene glycol and Na₃PO₄5, also propose a cooling device, include: the vacuum box is provided with a cooling box, the bottom of the cooling box is filled with liquid nitrogen, a cooling jacket is arranged above the liquid nitrogen in the cooling box, a cooling medium is filled in the cooling jacket, and the cooling jacket wraps the periphery of the discharge hole, so that the technical problem that the qualified rate of the guard plate is low due to the fact that the existing cooling medium is poor in cooling effect is solved.

Description

Cooling medium and cooling device for producing steel coil peripheral protective plate

Technical Field

The invention belongs to the technical field of cooling systems, and relates to a cooling medium and a cooling device for producing a steel coil peripheral protective plate.

Background

The coil of strip receives damage such as striking of colliding with easily in the transportation, consequently need parcel week backplate and end backplate in packaging process, in order to guarantee the better protective effect to the coil of strip, the requirement for quality of backplate is very high, in case the quality of backplate goes wrong, can cause the harm to the coil of strip, the backplate generally is the plastics material, utilize extrusion moulding, there is a refrigerated process behind the shaping, generally adopt ordinary water as cooling medium during the cooling, discover simple water as cooling medium can't reach stable cooling effect in the actual work, the phenomenon that cooling is inhomogeneous and cooling effect is not good always appears, the qualification rate that has leaded to final backplate is lower.

Disclosure of Invention

The invention provides a cooling medium and a cooling device for producing a steel coil peripheral guard plate, which solve the technical problems.

The technical scheme of the invention is realized as follows:

a cooling medium for producing a steel coil perimeter shield, comprising:

the components in parts by weight are as follows: 10 parts of water, 20 parts of ethylene glycol and Na₃PO₄5 parts of the raw materials.

The technical scheme is that the cleaning agent also comprises 15 parts of ethanol, 25 parts of isopropanol and 15 parts of 0.1% guar gum hydroxypropyl trimethyl ammonium chloride aqueous solution.

As a further technical proposal, the water-soluble polymer also comprises 10 parts of poly (N-isopropylacrylamide) aqueous solution with the concentration of 0.2 percent.

As a further technical scheme, the preparation method comprises the following steps:

s1, preparing and weighing each component for later use;

s2, mixing Na₃PO₄5, adding the mixture into ethylene glycol, stirring the mixture fully, adding water dropwise, and stirring the mixture after the dropwise addition is finished to obtain a first component solution;

s3, mixing ethanol and isopropanol, adding guar gum hydroxypropyl trimethyl ammonium chloride aqueous solution, and uniformly stirring to obtain a second component solution;

s4, fully mixing the first component and the second component, cooling to 5-6 ℃, adding a poly (N-isopropylacrylamide) aqueous solution, mixing to obtain a cooling medium, and storing at the temperature of 4-7 ℃.

A cooling device, comprising:

the vacuum box is internally provided with a cooling box, the bottom of the cooling box is filled with liquid nitrogen, a cooling jacket is arranged above the liquid nitrogen in the cooling box, a cooling medium is filled in the cooling jacket, and the cooling jacket wraps the periphery of the discharge hole.

As a further technical scheme, a partition plate is arranged above the liquid nitrogen in the cooling box, and a plurality of micropores are formed in the partition plate.

As a further technical scheme, a gap is arranged between the partition plate and the cooling jacket.

As a further technical scheme, one side of the vacuum box is provided with a vacuumizing hole.

As a further technical scheme, a liquid nitrogen inlet pipe and a liquid nitrogen outlet pipe are arranged on one side of the bottom of the cooling box, and the free ends of the liquid nitrogen inlet pipe and the liquid nitrogen outlet pipe penetrate through the vacuum box.

As a further technical scheme, the cooling box is connected with a refrigerator arranged outside the vacuum box.

Compared with the prior art, the invention has the working principle and the beneficial effects that:

1. in the present invention, Na₃PO₄The addition of water and glycol improves the cooling mediumThe cooling uniformity of the product is improved, the qualification rate of the product is improved, and Na is₃PO₄Adding into water to completely decompose, adding into ethylene glycol, and slowly adding water dropwise to obtain Na₃PO₄Can only partially decompose part of Na₃PO₄The cooling medium can play a role in scale prevention and rust prevention, and the undecomposed part can improve the cooling uniformity of the cooling medium; the guar gum hydroxypropyl trimethyl ammonium chloride aqueous solution with the concentration of 0.1 percent is matched with ethanol and isopropanol to form a stable cooling medium, so that the non-uniformity of cooling is avoided to a limited extent, the generation of internal stress of the guard plate is avoided, and the qualification rate of the guard plate is improved; the 0.2% poly (N-isopropylacrylamide) aqueous solution and the guar gum hydroxypropyl trimethyl ammonium chloride aqueous solution are matched for use, so that the excellent effect is achieved, and after an abnormal condition occurs, such as when the cooling medium rises to room temperature, a gel effect is generated, a large amount of heat energy can be absorbed at the moment, the occurrence of more serious consequences is avoided, and the self-defense effect is achieved.

2. The preparation method adopted in the invention is a method of mixing in groups, and the poly (N-isopropylacrylamide) aqueous solution is added into the mixed solution at the temperature of 5-6 ℃, so that the cooling medium is always stored at the temperature of 4-7 ℃, the stability of the poly (N-isopropylacrylamide) in the cooling medium is ensured, and the cooling medium can have a better cooling effect.

3. In the invention, the liquid nitrogen is contained at the bottom of the cooling box, and the supercooled nitrogen generated by the liquid nitrogen can wrap the periphery of the cooling jacket above the liquid nitrogen, so that the temperature of a cooling medium in the cooling jacket is kept at about 2-5 ℃, and the temperature stability is further kept, and tests prove that the qualification rate can reach 100% on the premise of normal operation of equipment after the cooling device is adopted by the formula and the preparation method of the cooling medium in the fourth embodiment; the arrangement of the partition plate enables nitrogen to uniformly enter the upper part along the micropores, and the stability of the temperature outside the cooling medium can be ensured; the arrangement of the gap can ensure that the bottom of the cooling jacket can also be contacted with super-cooled nitrogen, thereby improving the uniform stability of the temperature around the cooling jacket; the vacuum box is vacuumized through the vacuumizing hole, so that the heat insulation effect of the cooling box is better, and the stability of liquid nitrogen in the cooling box is kept under the action of the refrigerator.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

FIG. 1 is a schematic view of a cooling apparatus according to the present invention;

FIG. 2 is a schematic view of the internal structure of the cooling apparatus according to the present invention;

in the figure: 1-vacuum box, 2-cooling box, 3-liquid nitrogen, 4-cooling jacket, 5-cooling medium, 6-discharge port, 7-partition plate, 8-micropore, 9-gap, 10-vacuum-pumping hole, 11-liquid nitrogen inlet pipe, 12-liquid nitrogen outlet pipe and 13-refrigerator.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a cooling medium for producing a steel coil peripheral protective plate, which comprises the following components in percentage by weight:

the first embodiment is as follows:

the composition comprises the following components in parts by weight: 10 parts of water, 20 parts of ethylene glycol and Na₃PO₄5 portions of

Example two:

the composition comprises the following components in parts by weight: 10 parts of water, 20 parts of ethylene glycol and Na₃PO₄5 parts of ethanol, 15 parts of isopropanol, 25 parts of 0.1% guar gum hydroxypropyl trimethyl ammonium chloride aqueous solution and 15 parts of water.

Example three: 10 parts of water, 20 parts of ethylene glycol and Na₃PO₄5 parts of ethanol, 15 parts of isopropanol, 15 parts of 0.1% guar gum hydroxypropyl trimethyl ammonium chloride aqueous solution and 10 parts of 0.2% poly N-isopropyl acrylamide aqueous solution.

Example four: the formula is the same as that of the third embodiment, and the preparation method comprises the following steps:

s1, preparing and weighing each component for later use;

s2, mixing Na₃PO₄5, adding the mixture into ethylene glycol, stirring the mixture fully, adding water dropwise, and stirring the mixture after the dropwise addition is finished to obtain a first component solution;

s3, mixing ethanol and isopropanol, adding guar gum hydroxypropyl trimethyl ammonium chloride aqueous solution, and uniformly stirring to obtain a second component solution;

s4, fully mixing the first component and the second component, cooling to 5-6 ℃, adding the poly N-isopropylacrylamide aqueous solution, mixing to obtain a cooling medium, and storing at the temperature of 4-7 ℃.

A control group; ordinary water is used as a cooling medium.

TABLE 1 Effect on yield Using the Cooling media of the various examples

The data in table 1 show that the percent of pass of the product is greatly improved after the cooling medium of the invention replaces the existing common cooling medium, and the percent of pass can reach 99% to the maximum.

As shown in fig. 1-2, the invention further provides a cooling device, which comprises a vacuum box 1, wherein a cooling box 2 is arranged in the vacuum box 1, liquid nitrogen 3 is contained at the bottom of the cooling box 2, a cooling jacket 4 is arranged above the liquid nitrogen 3 in the cooling box 2, a cooling medium 5 is contained in the cooling jacket 4, and the cooling jacket 4 is wrapped around a discharge hole 6.

In this embodiment, the liquid nitrogen 3 is contained at the bottom of the cooling box 2, and the supercooled nitrogen generated by the liquid nitrogen 3 wraps around the cooling jacket 4 above the liquid nitrogen 3, so that the temperature of the cooling medium in the cooling jacket 4 is kept at about 2-5 ℃, and the stability of the temperature is further kept.

Further, a partition plate 7 is provided above the liquid nitrogen 3 in the cooling tank 2, and a plurality of micro-holes 8 are provided in the partition plate 7.

In this embodiment, the setting of baffle 7 makes the nitrogen body can evenly get into the top along micropore 8, more enough guarantees the stability of the outer temperature of coolant.

Further, a gap 9 is provided between the partition 7 and the cooling jacket 4.

In this embodiment, the gap 9 is provided to allow the bottom of the cooling jacket 4 to be in contact with the supercooled nitrogen, thereby improving the uniformity and stability of the temperature around the cooling jacket 4.

Further, one side of the vacuum box 1 is provided with a vacuuming hole 10.

Further, a liquid nitrogen inlet pipe 11 and a liquid nitrogen outlet pipe 12 are arranged on one side of the bottom of the cooling box 2, free ends of the liquid nitrogen inlet pipe 11 and the liquid nitrogen outlet pipe 12 penetrate through the vacuum box 1, and the cooling box 2 is connected with a refrigerating machine 13 arranged outside the vacuum box 1.

In this embodiment, the vacuum box 1 is vacuumized through the vacuuming hole 10, so that the heat insulation effect of the cooling box 2 is better, and the stability of liquid nitrogen in the cooling box 2 is maintained under the action of the refrigerator 13.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (1)

1. The cooling medium for producing the steel coil peripheral protective plate is characterized by comprising the following components in parts by weight:

10 parts of water, 20 parts of ethylene glycol and Na₃PO₄5 parts of ethanol, 15 parts of isopropanol, 25 parts of 0.1 percent guar gum hydroxypropyl trimethyl ammonium chloride aqueous solution, 10 parts of 0.2 percent poly (N-isopropyl acrylamide) aqueous solution,

the preparation method comprises the following steps:

s1, weighing the components according to the formula for later use;

s2, mixing Na₃PO₄Adding into ethylene glycol, and addingDropwise adding water after stirring, and stirring to obtain a first component solution;

s3, mixing ethanol and isopropanol, adding guar gum hydroxypropyl trimethyl ammonium chloride aqueous solution, and uniformly stirring to obtain a second component solution;

s4, fully mixing the first component and the second component, cooling to 5-6 ℃, adding a poly (N-isopropylacrylamide) aqueous solution, mixing to obtain a cooling medium, and storing at the temperature of 4-7 ℃.

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