CN214022622U

CN214022622U - Acid-free shot blasting rust removal production line for hot-rolled steel coils

Info

Publication number: CN214022622U
Application number: CN202023044332.XU
Authority: CN
Inventors: 文春鱼
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-12-15
Filing date: 2020-12-15
Publication date: 2021-08-24
Anticipated expiration: 2030-12-15

Abstract

The utility model relates to a hot rolling coil of strip does not have acid and throws ball rust cleaning production line, from the front end to the rear end in proper order including decoiling equipment, peeling apparatus, shot blasting equipment, rust cleaning equipment, passivation equipment, drying equipment and rolling equipment. The steel plate is continuously bent for many times in a shelling device, and then is subjected to high-performance shot blasting rust removal and brushing rust removal for many times, oxide skins on two sides of the steel plate are basically removed completely, and the high oxide skin removal efficiency can be continuously kept through the optimized utilization of shot energy, so that the uniformity of the quality of the treated steel plate is ensured.

Description

Acid-free shot blasting rust removal production line for hot-rolled steel coils

[ technical field ] A method for producing a semiconductor device

The utility model belongs to the technical field of the metal surface treatment technique and specifically relates to indicate a hot-rolled steel coil does not have acid and throws ball rust cleaning production line.

[ background of the invention ]

As is well known, China is a world-famous large iron and steel producing country, and the fully-classified and strongly-developed manufacturing industry in China has great demand and usage of various kinds of iron and steel, particularly has great demand on the usage of thin hot rolled steel plates. The iron scale attached to the surface of the steel is a harmful substance in the subsequent use and deep processing production process, and can be continuously used and processed only by cleaning the iron scale, otherwise, the quality requirement can not be met.

The soaking type pickling is matched with mechanical uncoiling and coiling, so that the most widely used mode for treating the steel plate oxide skin is provided at present, the mode for treating the steel plate oxide skin with the lowest direct production cost is provided, the volatilization of acid mist, the generation of waste water, waste gas and waste seriously influences the global environment which depends on the survival of people, such as the pollution of underground water, the pollution of vegetation on the ground and solid wastes of pickling on crops, the reduction of yield, or the deformation or the failure of harvest, serious corrosion of production plants, equipment and materials caused by the acid mist and the like, and meanwhile, the environment of operators on the pickling production site is very severe and the physical health of the workers is seriously influenced.

Along with the requirement of people on the environment is higher and higher, the national management and control on the environment is stricter and stricter, the environmental hazard brought by the soaking type pickling causes strict resistance and limitation of people and the country, a soaking type pickling production line needs to pass through strict approval and acceptance of national and local functional departments, the soaking type pickling production line can be put into normal production after being qualified through inspection, strict waste water, waste gas and solid waste treatment technologies and emission standards, various treatment equipment needs to be added and heavy production cost is required, the use and production cost of steel is greatly increased, and the production and development of the steel and various use industries are hindered.

At present, an acid-free rust removal process and equipment for wire rods appear and are applied, for example, patent No. CN201220088288.9 and patent with patent name of an acid-free wire drawing rust remover are acid-free rust removal equipment for wire rods, but because a steel plate has the characteristics of large size, heavy weight, small deformation amplitude (which does not mean non-deformation but cannot be bent and deformed in large scale like the wire rods), large size of scale lumps of the steel plate, difficulty in shedding of the lumps, and the like, the acid-free treatment of the wire rods cannot be adapted to the plate.

In response to the above problems, we developed a new production process.

[ Utility model ] content

The utility model aims at overcoming the defects of the prior art and providing a hot rolled steel coil acid-free shot blasting rust removal production line.

In order to solve the technical problem, the utility model adopts the following technical scheme:

an acid-free shot blasting rust removal production line for a hot rolled steel coil sequentially comprises an uncoiling device, a shelling device, a shot blasting device, a rust removal device, a passivation device, a drying device and a coiling device from the front end to the rear end; the uncoiling device is an uncoiler; the husking equipment is a multi-roller husking machine; the shot blasting equipment is a shot blasting machine, and a shot blasting head of the shot blasting machine faces to the vertical direction; the rust removing equipment is a steel brush roller; the passivation equipment is a passivation liquid tank, and an ultrasonic generator is arranged in the passivation liquid tank; the drying equipment is hot air drying equipment; the winding device is a winding machine.

In a further improvement, a first leveling device is arranged between the uncoiling device and the husking device, and the first leveling device is a multi-roll leveling machine.

In a further improvement scheme, a second leveling device and a first direction changing device are arranged between the husking device and the shot blasting device; the second leveling device is a multi-roll leveling machine; the first turning device is a plurality of turning pinch rolls which are sequentially arranged, and the distance between every two adjacent turning pinch rolls meets the turning pinch within the length of the steel plate.

In a further improvement scheme, the shot blasting machines comprise a plurality of shot blasting machines which are sequentially arranged.

In a further improvement scheme, second turning equipment is arranged between the derusting equipment and the passivating equipment, the second turning equipment is a plurality of turning pinch rollers which are sequentially arranged, and the distance between every two adjacent turning pinch rollers meets the turning pinch within the length of the steel plate.

In a further improvement scheme, a squeezing device is arranged between the passivation device and the drying device, and the squeezing device is a squeezing rubber roller.

In a further improvement scheme, a tension machine is arranged between the drying device and the winding device.

In a further improvement scheme, a collecting tank is arranged at the bottom of the shot blasting device and used for collecting dropped steel shots and oxide skin.

In a further improvement scheme, cyclone dust collecting equipment is arranged at both the derusting equipment and the shot blasting equipment and is used for collecting the dropped light scale and steel shot powder.

Compared with the prior art, the beneficial effects of the utility model are that: in the production process, the steel plate is continuously bent for many times in a shelling device, then high-performance shot blasting and brushing are carried out for many times for rust removal, oxide skins on two sides of the steel plate are basically removed completely, extremely high descaling efficiency can be continuously kept through optimized utilization of shot energy, and therefore uniformity of quality of the treated steel plate is guaranteed.

The invention will be described in further detail with reference to the following detailed description and accompanying drawings:

[ description of the drawings ]

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

[ detailed description ] embodiments

The embodiments of the present invention will be described in detail below, wherein the "connected" relationship is understood to mean either a fixed connection or a detachable connection or an integral connection; the connecting elements can be directly connected or connected through an intermediate medium, and persons skilled in the art can understand the connecting relation according to specific conditions, and can use the connecting elements in a screwed connection or riveting connection or welding connection or clamping connection or embedding connection mode to replace different embodiments in a proper mode.

The terms of orientation of the upper, lower, left, right, top, bottom, etc. as used in the specification, may be directly or indirectly related to each other through additional features or elements thereof; above may be directly above and obliquely above, or it simply means above the other; other orientations may be understood by analogy.

The material for manufacturing the part with the solid shape shown in the specification can be a metal material or a non-metal material or other composite materials; the machining processes used for components having solid shapes can be stamping, forging, casting, wire cutting, laser cutting, casting, injection molding, digital milling, three-dimensional printing, machining, and the like; one skilled in the art can select the materials and the manufacturing process adaptively or in combination according to different processing conditions, cost and precision.

An acid-free shot blasting rust removal production line for a hot rolled steel coil is shown in figure 1 and sequentially comprises an uncoiling device, a shelling device, a shot blasting device, a rust removal device, a passivation device, a drying device and a coiling device from the front end to the rear end; the uncoiling device is an uncoiler 10; the husking equipment is a multi-roller husking machine 20; the shot blasting equipment is a shot blasting machine 30, shot blasting heads of the shot blasting machine 30 face to the vertical direction, and the shot blasting machines 30 comprise a plurality of shot blasting machines which are sequentially arranged; the rust removing equipment is a steel brush roller; the passivation equipment is a passivation liquid tank 40, and an ultrasonic generator is arranged in the passivation liquid tank 40; the drying equipment is hot air drying equipment 50; the winding device is a winder 60; a first leveling device is arranged between the uncoiling device and the husking device, and the first leveling device 70 is a multi-roller leveling machine; a second leveling device 80 and a first direction changing device 90 are arranged between the husking device and the shot blasting device; the second leveling device is a multi-roll leveling machine; the first direction changing equipment 90 is a plurality of steering pinch rollers which are arranged in sequence, and the distance between every two adjacent steering pinch rollers meets the direction changing pinch within the length of the steel plate; a second direction-changing device 100 is arranged between the derusting device and the passivating device, the second direction-changing device 100 is a plurality of sequentially arranged steering pinch rollers, and the distance between every two adjacent steering pinch rollers meets the requirement of direction-changing pinch within the length of the steel plate; a squeezing device is arranged between the passivation device and the drying device 50, and the squeezing device is a squeezing rubber roll; a tension machine 110 is arranged between the drying device and the winding device.

The specific production operation mode is as follows: the coil conveying trolley conveys the steel coil on the saddle to an uncoiler 10 (in the embodiment, a double-head uncoiler) to enable the inner hole of the steel coil to be aligned with two collapsible winding drums of the uncoiler 10, the two collapsible winding drums of the uncoiler 10 are shrunk and stretched into the inner hole of the steel coil, the collapsible winding drums stretch to tightly support the inner ring of the steel coil, a pinch roller presses the head of the steel coil, the strapping tape of the steel coil is removed, the coil conveying trolley is put down and moved away, a guide plate stretches out to support the head of the steel coil, the uncoiler 10 and the pinch roller are rotated to guide the head of the steel coil to the pinch machine, a leveling roller of a multi-roller leveling machine is pressed down according to the thickness of the steel plate, the steel plate enters the multi-roller husking machine 20 after being leveled, the multi-roller husking machine 20 is lifted to enable the steel plate to smoothly pass through the multi-roller husking machine 20, the husking machine 20 is started to press the husking roller, the steel plate is continuously bent for 4 times in an S shape (in the embodiment, 4 tables are adopted), the oxidized skin part on the steel plate is peeled or loosened, at the moment, the effect of preliminary scale breaking and rust removing is achieved; the steel plate passes through the steering pinch rolls forwards, the distance between two adjacent steering pinch rolls meets the requirement of direction-changing pinch in the length of the steel plate, taking 3 groups of steering pinch rolls in the embodiment as an example, within the distance of each group of 6 meters with the total length of 18 meters, the length midpoint of each clamping roll is taken as the center, the 3 groups of rolls are sequentially changed into 30 degrees and 60 degrees upwards in a single-side mode, finally, the steel plate is horizontally placed from 180 degrees to 90 degrees and erected before entering the shot blasting machine 30, along with the steel plate sequentially entering the shot blasting machine 30, two 90KW high-speed rotating shot blasting heads on and under each shot blasting machine 30 throw steel sand to the surface of the steel plate at high speed, the steel plate is impacted by the powerful, dense, high-speed and full-coverage steel shots for many times, the oxide skin attached to the surface of the steel plate is impacted and falls off again, at the time, the removal rate of the oxide skin attached to the steel plate reaches more than 95%, a small amount of residual oxide skin is attached to the steel plate, and the steel plate enters the steel brush roll, after the steel plate is cleaned by the steel brush roller which rotates up and down back and forth for many times, oxide skin attached to the surface of the steel plate is basically removed, the removal rate reaches more than 99.5 percent, and the surface of the steel plate is grey metal; the steel plate continuously enters the steering pinch roll forwards, and is sequentially changed into 60 degrees, 30 degrees and 0 degrees in a single-side downward mode, so that the steel plate is finally changed from being vertical to 90 degrees to being horizontally placed at 180 degrees after the shot blasting is finished; the steel plate enters a passivation liquid tank 40, the residual micro oxide skin of the steel plate is further cleaned up by ultrasonic waves in a passivation liquid medium, and the steel plate in the passivation liquid tank 40 is soaked in the passivation liquid to achieve the purpose of rust prevention; the steel plate continuously moves forwards, after the passivation solution is removed through extrusion of the squeezing rubber roll, the steel plate enters hot air drying equipment 50 for hot air blowing, the residual passivation solution on the surface of the steel plate is blown completely through hot air, finally, the steel plate enters a tension machine 110 and a pinch roll to a shearing machine, after the shearing machine cuts a welding opening of the steel plate and rolls, the steel plate (or the previous roll of steel plate) is pulled to complete rolling, binding and blanking, and the tail part of the steel coil is connected with the head part of the next roll of steel plate on a welding platform until the steel coil is unwound.

In the production process, the steel plate is continuously bent for many times in a shelling device, then high-performance shot blasting and brushing are carried out for many times for rust removal, oxide skins on two sides of the steel plate are basically removed completely, extremely high descaling efficiency can be continuously kept through optimized utilization of shot energy, and therefore uniformity of quality of the treated steel plate is guaranteed.

In an embodiment, a collecting tank is arranged at the bottom of the shot blasting device and used for collecting falling steel shots and scale cinder, and cyclone dust collecting devices are arranged at the derusting device and the shot blasting device and used for collecting falling light scale cinder and steel shot powder. The steel shot strikes the steel plate face and then mixed oxide skin falls into the collecting tank together, light oxide skin and steel shot powder are collected by cyclone dust collection equipment in the falling process, the steel shot which is not collected and sucked away falls into the collecting tank and then is lifted to the steel shot bin by the material lifting machine, and the steel shot bin is continuously recycled.

Although the present invention has been described in detail with reference to the above embodiments, it will be apparent to those skilled in the art from this disclosure that various changes or modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims. Therefore, the detailed description of the embodiments of the present disclosure is to be construed as merely illustrative, and not limitative of the present disclosure, but rather to limit the scope thereof by the appended claims.

Claims

1. An acid-free shot blasting rust removal production line for a hot rolled steel coil is characterized by sequentially comprising an uncoiling device, a shelling device, a shot blasting device, a rust removal device, a passivation device, a drying device and a coiling device from the front end to the rear end; the uncoiling device is an uncoiler; the husking equipment is a multi-roller husking machine; the shot blasting equipment is a shot blasting machine, and a shot blasting head of the shot blasting machine faces to the vertical direction; the rust removing equipment is a steel brush roller; the passivation equipment is a passivation liquid tank, and an ultrasonic generator is arranged in the passivation liquid tank; the drying equipment is hot air drying equipment; the winding device is a winding machine.

2. The acid-free shot blasting rust removal production line for the hot-rolled steel coils as claimed in claim 1, wherein a first leveling device is arranged between the uncoiling device and the shelling device, and the first leveling device is a multi-roll leveling machine.

3. The acid-free shot blasting rust removal production line for the hot-rolled steel coil as claimed in claim 2, wherein a second leveling device and a first direction changing device are arranged between the shelling device and the shot blasting device; the second leveling device is a multi-roll leveling machine; the first turning device is a plurality of turning pinch rolls which are sequentially arranged, and the distance between every two adjacent turning pinch rolls meets the turning pinch within the length of the steel plate.

4. The acid-free shot blasting and rust removing production line for the hot-rolled steel coils as claimed in claim 1, wherein the shot blasting machines comprise a plurality of shot blasting machines which are sequentially arranged.

5. The acid-free shot blasting rust removal production line for the hot-rolled steel coils as claimed in claim 1, wherein a second direction changing device is arranged between the rust removal device and the passivation device, the second direction changing device is a plurality of sequentially arranged steering pinch rollers, and the distance between every two adjacent steering pinch rollers meets the requirement of direction changing pinch within the length of the steel plate.

6. The acid-free shot blasting rust removal production line for the hot-rolled steel coils as claimed in claim 1, wherein a squeezing device is arranged between the passivation device and the drying device, and the squeezing device is a squeezing rubber roll.

7. The acid-free shot blasting rust removal production line for the hot-rolled steel coils as claimed in claim 1, wherein a tensioner is arranged between the drying device and the winding device.

8. The acid-free shot blasting and rust removing production line for the hot-rolled steel coils as claimed in claim 1, wherein a collecting tank is arranged at the bottom of the shot blasting equipment and used for collecting dropped steel shots and scale.

9. The acid-free shot blasting rust removal production line for the hot-rolled steel coils as claimed in claim 1, wherein cyclone dust collecting devices are arranged at the positions of the rust removal devices and the shot blasting devices and are used for collecting the dropped light oxide skins and steel shot powder.