CN111644515A - Online cooling method and device for hot-bent square and rectangular tubes - Google Patents

Abstract

The invention relates to the technical field of high-temperature strip steel cooling, in particular to an on-line cooling method and a cooling device for a hot-bending square and rectangular tube. The hot bending square tube includes two sets of side walls arranged opposite to each other. The two sets of side walls on the same section are respectively subjected to water spray cooling and straightening pressure, and the same set of side walls are alternately cycled for water spray cooling and straightening pressure. Apply straightening pressure. The beneficial effects of the present invention are: two groups of side walls on the same section are simultaneously subjected to water spray cooling and application of straightening pressure, and the application of straightening pressure and direct water spray cooling are performed alternately, so that each side wall can be fully cooled , and can be forced to overcome the stress and deformation of the hot bending square tube, which ensures the production quality of the hot bending square tube.

Description

On-line cooling method and cooling device for hot bending square tube

technical field

The invention relates to the technical field of high-temperature strip steel cooling, in particular to an on-line cooling method and a cooling device for a hot-bending square and rectangular tube.

Background technique

The hot bending forming process refers to the use of high temperature steel strips (steel plates) as raw materials, and the roll bending forming process is used to produce section steel. The formed section steel is generally cooled by air cooling, which greatly occupies the workshop area, has low cooling efficiency, and has a great impact on the internal environment of the factory. Especially the hot-bending square and rectangular tube section steel, because of its structural characteristics, is easy to deform during the cooling process, and the cooling efficiency is low, and the product forming quality is poor.

SUMMARY OF THE INVENTION

In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide an online cooling method and a cooling device for a hot-bending rectangular tube, which are used to solve the problems of low cooling efficiency and easy cooling process of the hot-bending rectangular tube in the prior art. deformation, etc.

In order to achieve the above purpose and other related purposes, the present invention provides an on-line cooling method for a hot-bending rectangular tube. Water spray cooling and application of straightening pressure are performed, and the same group of side walls are alternately cycled for water spray cooling and application of straightening pressure.

The beneficial effects of the present invention are: two groups of side walls on the same section are simultaneously subjected to water spray cooling and application of straightening pressure, and the application of straightening pressure and direct water spray cooling are alternately cycled, so that each side wall can be fully cooled , and can be forced to overcome the stress and deformation of the hot-bending square tube, which ensures the production quality of the hot-bending square tube.

A cooling device applied to the above-mentioned on-line cooling method for a hot-bending rectangular tube, comprising a first frame and a second frame distributed along the axial direction of the hot-bending rectangular tube, the first frame is provided with A water spray mechanism for spraying water to cool the first group of side walls and a roll mechanism for applying straightening pressure to the second group of side walls, the second stand is provided with the second frame for applying water to the first group of side walls The rolling mechanism for pressure and the water spraying mechanism for spraying water to the second group of side wall groups, the rolling mechanism operates to push the hot bending square tube to move along the axial direction of the hot bending square tube.

The beneficial effects of the invention are as follows: the structure is simple, the installation and layout are convenient, the side walls of the same section can be alternately cycled for water spray cooling and straightening pressure, cooling and anti-deformation are achieved at the same time, and the cooling effect and the hot bending moment are guaranteed. the quality of the tube.

Optionally, the water spraying mechanism has two water spraying members, the two water spraying members are respectively located on the outer sides of the two opposite side walls of the same side wall group, and the water spraying members are provided with water spraying to the corresponding side walls. The nozzle, the angle formed between the water spraying direction of the nozzle and the corresponding side wall is greater than 0° and less than 90°.

Optionally, the roll mechanism includes two cooling rolls, the two cooling rolls are respectively located on the outer sides of the two opposite side walls of the same side wall group, the cooling rolls are in contact with the corresponding side walls to push the hot bending rectangular tube to move and Cool the side walls in contact with it.

Optionally, each of the cooling rolls is provided with a corresponding spray head, the spray heads are aligned with the cooling roll and spray water on the surface of the cooling roll.

Optionally, water storage grooves are provided on the roll surface of the cooling roll.

Optionally, the water storage grooves are spirally arranged along the roll surface of the cooling roll.

Optionally, when the number of the water storage grooves is greater than or equal to two, the water storage grooves are not connected to each other.

Optionally, the water spray mechanism adopts high-pressure water spray, and the spray pressure is greater than or equal to 6MPa.

Optionally, when the number of the first racks and/or the second racks is greater than or equal to two racks, the first racks and the second racks are alternately arranged.

The beneficial effects of adopting the above optional solution are: improved cooling efficiency, symmetrical arrangement of structures, reduced space occupation, and compact layout.

Description of drawings

FIG. 1 is a schematic structural diagram of a first rack of a cooling device of the present invention;

FIG. 2 is a schematic structural diagram of the second rack of the cooling device of the present invention;

Fig. 3 shows the structural schematic diagram of the cooling roll of the cooling device of the present invention;

Figure 4 shows a schematic top view of the cooling device of the present invention.

Part Number Description

1 water jet;

11 nozzle;

2 cooling rolls;

21 water storage groove;

3 nozzles;

4 hot bending square tube;

5 the first rack;

6 Second rack.

Detailed ways

The embodiments of the present invention are described below through specific specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

It should be noted that the terms such as "up", "down", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and clarity, and are not used for In order to limit the implementable scope of the present invention, the change or adjustment of the relative relationship should also be regarded as the implementable scope of the present invention without substantially changing the technical content.

Before describing the embodiments of the present invention in detail, the application environment of the present invention is described first. The technology of the present invention is mainly applied to strip steel cooling, especially the technical problems of low cooling efficiency and easy deformation of the hot-bending square tube. The anti-deformation straightening pressure applied to the tube cannot meet the requirements of cooling efficiency and preventing deformation of the hot bending rectangular tube at the same time. Therefore, the present invention performs the alternate cycle operation of spraying water cooling and applying straightening pressure to the side wall of the hot bending rectangular tube. , while improving the cooling efficiency and preventing the deformation of the hot bending square tube.

As shown in FIG. 1 and FIG. 2 , in the on-line cooling method of the hot-bending rectangular tube of the present invention, the hot-bending rectangular tube 4 includes two sets of side walls arranged opposite to each other, that is, four side walls on the same section, each two The oppositely arranged side walls are a group of side wall groups. Water spray cooling and straightening pressure are simultaneously applied to the two groups of side walls on the same section, that is, to directly spray water to cool one group of side walls on the same section, and apply straightening pressure to the other group of side walls. The same group of sidewall groups are alternately sprayed with water to cool and apply straightening pressure. For example, firstly, spray water to cool the first group of sidewall groups, and apply correction pressure to the second group of sidewall groups; then apply correction to the first group of sidewall groups. Pressure, spray water to cool the second group of side walls; spray water to cool the first group of side walls, apply correction pressure to the second group of side walls, and continue to circulate, that is, spray water to cool and apply correction to the same side wall. Alternate cyclic operation of direct pressure until cooling down is completed.

The on-line cooling method for the hot-bending rectangular tube of the invention is simple and convenient to operate, not only improves the cooling efficiency, but also effectively prevents the hot-bending rectangular tube from being deformed due to stress, thereby ensuring the quality of product production.

As shown in FIG. 1 and FIG. 2 , the cooling device of the present invention is applied to the above-mentioned on-line cooling method of the hot-bending rectangular tube. Racks, the interval between the first rack and the second rack can be set as required. The first frame is provided with a water spray mechanism for spraying water to cool the first group of side walls and a roller mechanism for applying straightening pressure to the second group of side walls, and the second frame is provided with a spray mechanism for the first group of side walls. The roller mechanism that applies pressure to the side wall group and the water spray mechanism that sprays water to the second group of side wall groups, that is, the two racks arranged in front and back can cooperate to form a closed-loop water-spray cooling and apply a closed-loop straightening pressure, so as to ensure that each side wall can receive uniform cooling and uniform straightening pressure, to ensure the cooling effect and prevent deformation due to stress. The operation of the roll mechanism pushes the hot bending square tube 4 to move along the axial direction of the hot bending square tube 4. The rolling mechanism can not only contact the hot bending square tube 4 to apply straightening pressure, but also rotate to make the hot bending square tube 4 axis. so that the same section of the hot bending square tube 4 can be in contact with the first frame and the second frame during the moving process, ensuring that each side wall can be cooled by water spray and subjected to straightening pressure.

As shown in FIG. 1 and FIG. 2 , in an exemplary embodiment, the water spraying mechanism has two water spraying parts 1, and the two water spraying parts 1 are respectively located on the outer sides of the two opposite side walls of the same side wall group, and the water sprays The part 1 is provided with a nozzle 11 that sprays water to the corresponding side wall. The nozzle 11 directly sprays water to cool the opposite two side walls of the hot bending square tube 4, and the cooling effect is good. In order to reduce the hot bending moment For the stress deformation of the tube 4 during the cooling process, the water spray mechanism can use high-pressure water spray, and the spray pressure is greater than or equal to 6MPa. Since the sprayed cooling water has a certain impact force, the angle formed between the spraying direction of the nozzle 11 and the corresponding side wall can be greater than 0° and less than 90°, that is, the sprayed water from the nozzle 11 is inclined towards the hot bend The side wall of the square tube 4 adopts this structural design to prevent the water sprayed from directly impacting the side wall and causing rebound, and the water that rebounded earlier collided with the water sprayed to the side wall next, and the water sprayed back and forth formed a Interference, so that the water sprayed from the rear cannot fully contact the side wall to cool the side wall, and the inclined water spray effectively solves the problem of the mutual impact and interference of the water sprayed from the front and back, and can provide a certain anti-deformation impact force. It can also ensure the cooling effect. The angle of inclination of the nozzles 11 can be set according to requirements. For example, in this embodiment, the angle formed by the nozzles on the first frame and the horizontal direction is 30°, wherein the nozzles on the left side face downwards. The nozzle on the left side is inclined upward by 30°; the angle formed by the nozzle on the second frame and the vertical direction is 60°, and the nozzle on the top side is inclined to the left by 60°, The nozzles located on the bottom side are inclined to the right by 60°, and the corresponding nozzles on the opposite side walls of the same section have the same angle of inclination and opposite directions, so that the two side walls are cooled more uniformly by force.

As shown in FIG. 1 and FIG. 2 , in an exemplary embodiment, the roll mechanism includes two cooling rolls 2 , the two cooling rolls 2 are respectively located on the outer sides of the two opposite side walls of the same side wall group, and the cooling roll 2 is connected to the The contact of the corresponding side walls pushes the hot bending square tube 4 to move and cools the side walls in contact with it. In this embodiment, each cooling roll 2 can be provided with a corresponding spray head 3, the spray head 3 is aligned with the cooling roll 2, and sprays water on the surface of the cooling roll 2, so as to achieve cooling and cooling, so that the cooling roll 2 can not only be compatible with the cooling roll 2. The straightening pressure is directly applied to the outer side wall of the hot-bending rectangular tube 4 to overcome the deformation of the hot-bending rectangular tube due to stress, and can also assist in cooling.

The two water spray parts of the water spray mechanism are arranged on the outside of the two opposite side walls, and the two cooling rolls of the roller mechanism are arranged on the outside of the other two opposite side walls. The use of this structure layout reduces the space occupation on the one hand and avoids the need for The two adjacent side walls are simultaneously installed with cooling rolls or the two adjacent side walls are simultaneously installed with water sprays to cause interference, which requires high space. On the other hand, the two side walls cooled by water spray are symmetrical side walls and The two side walls where the correction pressure is applied are symmetrical side walls, so that the cooling and the force are more uniform, which is beneficial to improve the cooling effect and the straightening ability.

As shown in FIGS. 1 to 3 , in an exemplary embodiment, a water storage groove 21 is provided on the roll surface of the cooling roll 2 , and the water storage groove 21 is spirally arranged along the roll surface of the cooling roll, that is, the water storage groove The angle formed between the groove 21 and the axial or horizontal direction of the cooling roll 2 is greater than 0°, and forming a certain angle is beneficial to increase the contact area between the water storage groove 21 and the side wall of the hot bending square tube 4, and the force is more It is uniform, reduces indentation, and can accommodate more cooling water. The size of the formed angle can be set according to requirements. In this embodiment, the formed angle can be 15°. When the number of water storage grooves 21 is greater than or equal to two, the water storage grooves 21 are not connected to each other. This structural design is beneficial to prevent the cooling water in the water storage grooves 21 from interfering with each other and avoiding heat and cold. The water mixing affects the cooling effect, which is convenient to control the flow direction of the cooling water and improve the cooling effect. In order to make the water storage groove 21 fully receive and accommodate the cooling water, the installation angle of the spray head 3 can be adjusted according to the requirements and installation position. For example, in this embodiment, the first frame is arranged on the top side of the hot bending square tube The included angle of water spraying with the sprinkler head 3 on the bottom side can be 90°, that is, perpendicular to the horizontal direction, and the included angle formed by the water spraying angle of the sprinkler head 3 on the second frame and the horizontal direction can be 30°, wherein the The water spraying directions of the nozzles on the left and right side walls of the rectangular tube 4 are inclined upward by 30°, and the water storage groove of the cooling roll forms an upwardly inclined angle with the axis of the cooling roll, so that the water spraying direction of the nozzle is different from the water storage. Matching the inclined directions of the grooves is conducive to making the sprayed water fully fall into the water storage grooves, filling the water storage grooves, improving the contact time between the cooling water and the cooling roll, and improving the cooling effect of the cooling roll.

As shown in FIG. 1 , FIG. 2 and FIG. 4 , in an exemplary embodiment, when the number of the first racks and/or the second racks is greater than or equal to two racks, that is, when the number of the first racks is greater than or equal to two or equal to two, or when the number of the second racks is greater than or equal to two, or when both the first rack and the second rack are greater than or equal to two, the first rack and the second rack The racks are arranged alternately at intervals, so that each side wall of the same section can be alternately circulated for direct water spray cooling and application of straightening pressure. Among them, the number of the first rack and the second rack and the distance between the adjacent racks can be set according to requirements, that is, to ensure that the direct water spray cooling and the straightening pressure cooling are alternately performed, which can not only improve the hot bending moment The cooling efficiency of the tube can also be prevented from being deformed during the cooling process, which ensures the production quality of the product.

The working process of the cooling device is: the hot bending square tube moves along its axial direction, when the first section of the hot bending rectangular tube reaches the position of the first frame and contacts the first frame, the spray on the first frame The water mechanism directly sprays water to cool the first group of side walls on the first section, while the roller mechanism on the first stand applies straightening pressure to the second group of side walls on the first section; hot bending moment When the pipe continues to move along its axial direction and reaches the second frame position and contacts the second frame, that is, the first section reaches the second frame position, the water spray mechanism on the second frame will affect the second group on the first section. The side wall group is directly sprayed with water for cooling, and at the same time, the roller mechanism on the second stand applies straightening pressure to the first group of side wall groups on the first section, and the hot bending square tube continues to move with the first stand and the second stand. The racks are alternately contacted, so that the same group of side walls are alternately cycled for water spray cooling and application of straightening pressure until the cooling is completed.

The on-line cooling method and cooling device of the hot-bending rectangular tube of the present invention can improve the cooling effect by simultaneously spraying water cooling and applying straightening pressure to the side walls of the same section, so that some side walls of the same section can be directly cooled, and some The side wall is subjected to straightening pressure to overcome the stress and deformation during the cooling process, ensuring the quality of the side wall of the section, and water spray cooling and application of straightening pressure are alternately cycled, so that cooling and straightening resistance to deformation can be fully guaranteed at the same time ; In addition, the simple and compact structure layout reduces the space occupation of the workshop production environment, optimizes the production environment, reduces the cost, improves the cooling efficiency and cooling effect, and ensures the production quality of the product.

The above-mentioned embodiments merely illustrate the principles and effects of the present invention, but are not intended to limit the present invention. Anyone skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed in the present invention should still be covered by the claims of the present invention.

Claims (10)

1. a method for on-line cooling of a hot-bending rectangular tube, characterized in that: the hot-bending rectangular tube comprises two sets of side wall groups that are set opposite to each other, and the two groups of side wall groups on the same section are synchronously sprayed with water to cool and apply Straightening pressure, and the same set of side walls alternately cycle for water spray cooling and straightening pressure. 2. A cooling device applied to the on-line cooling method of the hot-bending rectangular tube as claimed in claim 1, characterized in that it comprises a first frame and a second frame distributed along the axial direction of the hot-bending rectangular tube, The first frame is provided with a water spray mechanism for spraying water to cool the first group of side walls and a roller mechanism for applying straightening pressure to the second group of side walls, and the second frame is provided with A roller mechanism for applying pressure to the first group of sidewall groups and a water spray mechanism for spraying water to the second group of sidewall groups, the operation of the roller mechanism pushes the hot-bending rectangular tube to move axially along the hot-bending rectangular tube . 3 . The cooling device according to claim 2 , wherein the water spraying mechanism has two water spraying parts, and the two water spraying parts are respectively located on the outer sides of the two opposite side walls of the same side wall group. The water element is provided with a nozzle for spraying water to the corresponding side wall, and the included angle formed by the water spray direction of the nozzle and the corresponding side wall is greater than 0° and less than 90°. 4. The cooling device according to claim 2, wherein the roll mechanism comprises two cooling rolls, the two cooling rolls are respectively located on the outer sides of the two opposite side walls of the same side wall group, and the cooling rolls are connected with The contact of the corresponding side wall pushes the hot bending square tube to move and cools the side wall in contact with it. 5 . The cooling device according to claim 4 , wherein each of the cooling rolls is provided with a corresponding spray head, the spray heads are aligned with the cooling roll and spray water on the surface of the cooling roll. 6 . 6 . The cooling device according to claim 4 , wherein a water storage groove is provided on the roll surface of the cooling roll. 7 . 7 . The cooling device according to claim 6 , wherein the water storage grooves are spirally arranged along the roll surface of the cooling roll. 8 . 8. The cooling device according to claim 6 or 7, wherein when the number of the water storage grooves is greater than or equal to two, the water storage grooves are not connected to each other. 9 . The cooling device according to claim 2 , wherein the water spray mechanism adopts high-pressure water spray, and the spray pressure is greater than or equal to 6MPa. 10 . 10. The cooling device according to claim 2, wherein when the number of the first rack and/or the second rack is greater than or equal to two racks, the first rack and the second rack Alternate settings.

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