阅读说明：本技术 一种带有内部冷却结构的冶金流程用辊 (Roller with internal cooling structure for metallurgical process ) 是由 兰鹏 张家泉 于 2019-10-24 设计创作，主要内容包括：本发明涉及冶金设备技术领域,提供了一种带有内部冷却结构的冶金流程用辊,包括辊套、芯轴、冷却回路；所述辊套套装在所述芯轴的外表面；所述辊套上与所述芯轴接触的一面设置冷却槽,所述冷却槽沿芯轴轴向平行分布；所述芯轴内设置所述冷却回路,所述冷却回路包括轴向冷却管路和径向冷却管路；冷却介质通过所述冷却回路进入所述冷却槽,冷却介质在所述冷却槽内流动带走所述冶金流程辊产生的热量,并通过所述冷却回路流出所述冶金流程辊。本发明强化辊身冷却效果、降低辊面温度,实现低变形、长寿命的目标,可大大提高铸轧产品形状精度并减少耗材成本,设计、运行和维护成本低,可大规模工业推广。(The invention relates to the technical field of metallurgical equipment, and provides a roller with an internal cooling structure for a metallurgical process, which comprises a roller sleeve, a mandrel and a cooling loop, wherein the roller sleeve is arranged on the roller sleeve; the roller sleeve is sleeved on the outer surface of the mandrel; one surface of the roller sleeve, which is in contact with the mandrel, is provided with a cooling groove, and the cooling grooves are distributed in parallel along the axial direction of the mandrel; the cooling loop is arranged in the mandrel and comprises an axial cooling pipeline and a radial cooling pipeline; the cooling medium enters the cooling bath through the cooling circuit, flows in the cooling bath, carries away heat generated by the metallurgical process roller, and flows out of the metallurgical process roller through the cooling circuit. The invention strengthens the cooling effect of the roll body, reduces the temperature of the roll surface, realizes the aims of low deformation and long service life, can greatly improve the shape precision of cast-rolled products and reduce the material consumption cost, has low design, operation and maintenance cost, and can be industrially popularized in a large scale.)

1. A roller with an internal cooling structure for a metallurgical process is characterized by comprising a roller sleeve, a mandrel and a cooling loop; the roller sleeve and the mandrel are coaxially assembled, and the roller sleeve is sleeved on the outer surface of the mandrel;

one surface of the roller sleeve, which is in contact with the mandrel, is provided with a cooling groove, and the cooling grooves are distributed in parallel along the axial direction of the mandrel;

the cooling loop is arranged in the mandrel and comprises an axial cooling pipeline and a radial cooling pipeline;

the cooling medium enters the cooling bath through the cooling circuit, flows in the cooling bath with the heat generated by the metallurgical process roll and flows out of the metallurgical process roll through the cooling circuit.

2. Metallurgical process roll with internal cooling structure according to claim 1,

the axial cooling pipeline comprises a main axial inflow pipeline, an axial inflow branch and an axial outflow branch, and the main axial outflow pipeline;

the radial cooling pipeline comprises a main radial inflow pipeline, a radial inflow branch, a radial outflow branch and a main radial outflow pipeline;

and cooling medium enters from the main shaft to the inflow pipeline, sequentially passes through the main radial inflow pipeline, the axial inflow branch and the radial inflow branch and enters the cooling tank, and takes away heat generated by the roller for the metallurgical process and then sequentially flows out along the radial outflow branch, the axial outflow branch, the main radial outflow pipeline and the main shaft to the outflow pipeline.

3. A metallurgical process roll with internal cooling structure according to claim 2, characterized in that the inlet end of the main axial inflow line is connected to the outlet tube by means of a rotary valve, and the outlet end of the main axial outflow line is connected to the outlet tube by means of a rotary valve;

and cooling medium is pumped into the main axial inflow pipeline through a rotary valve along the introduced outer pipe, and finally discharged out of the roller for the metallurgical process through the rotary valve and the introduced outer pipe along the main axial outflow pipeline.

4. A metallurgical process roll with internal cooling structure according to any one of claims 1 to 3, wherein the cooling channel is segmented in the circumferential direction, the number of segments is not less than 2, and adjacent cooling channel circumferential segments are separated by end sockets; the cooling medium flows independently between the circumferential sections of the cooling grooves.

5. A roller with an internal cooling structure for a metallurgical process according to any one of claims 1 to 3, wherein the number of the cooling grooves distributed in parallel along the axial direction of the mandrel is not less than 1, the width of the cooling grooves is 3 to 50mm, the depth of the cooling grooves is 3 to 50mm, and the distance between the cooling grooves is 3 to 30 mm.

6. Metallurgical process roll with internal cooling structure according to claim 4, characterized in that the number of axial inflow branches and the number of axial outflow branches are equal to the number of circumferential segments of the cooling bath; the number of the radial inflow branches and the number of the radial outflow branches are equal to the number of the cooling grooves which are distributed in parallel along the axial direction of the mandrel.

7. A metallurgical process roll with internal cooling structure according to any one of claims 2, 3 or 6, characterized in that the main axial inflow conduit and the main axial outflow conduit are arranged at the same end of the mandrel or at both ends of the mandrel respectively.

8. A metallurgical process roll with internal cooling structure according to claim 2, characterized in that the medium inflow end of the roll shell corresponds to the radial inflow branch of the cooling circuit of the mandrel and the medium outflow end of the roll shell corresponds to the radial outflow branch of the cooling circuit of the mandrel when assembled.

9. A metallurgical process roll with internal cooling structure according to claim 7, wherein the contact between the mandrel and both the main axial inflow conduit and the main axial outflow conduit is provided with a rotary joint, and when the main axial inflow conduit and the main axial outflow conduit are at the same end of the mandrel, the rotary joint is of a double pass type; when the main axial inflow pipeline and the main axial outflow pipeline are respectively arranged at two ends of the mandrel, the rotary joint adopts a single-way type.

10. A metallurgical process roll with internal cooling structure according to claim 1, wherein the roll shell is made of heat resistant steel, high temperature alloy or ceramic; the outer part of the roller sleeve is hardened by adopting a surfacing, laser cladding or additive manufacturing method; the mandrel is made of metal or alloy, the outside of the mandrel is in contact with the roller sleeve and is coaxially assembled, and the supporting and fixing effects on the roller sleeve are achieved.

Technical Field

The invention relates to the technical field of metallurgical equipment, in particular to a roller with an internal cooling structure for a metallurgical process.

Background

China is a large country with vigorous development of metallurgical technology, and the yields of steel and nonferrous metals are attracting attention. In the pyrometallurgical process, the casting, heating, rolling, heat treatment and other links all relate to the product conveying problem, and the roller way is the most common way at present.

As the roller is in service in a high-temperature environment for a long time, the strength and the wear resistance of the roller surface are reduced after the roller surface is heated and heated, and the roller deforms and even has fatigue cracks in repeated thermal load. On the one hand, the production cost is increased, and on the other hand, the product quality is also influenced. The cracks and segregation of the continuous casting slab caused by the roller deformation problem are proved by a large amount of data, and the phenomena that the shape accuracy of the product is influenced by the abrasion, the chipping and the like of the roller emerge endlessly in enterprises.

Reducing the roll body temperature is critical to reduce roll face distortion and improve service life. The external cooling method is to directly spray a cooling medium on the surface of the roller, the additional structure is complex, the requirement on the field space is high, the temperature of the roller surface at the contact part of the cooling medium and the high-temperature blank is difficult to directly reduce when the blank drawing or rolling speed is low, the roller is often scalded, and the transportation capacity of a roller way, the environmental humidity, the atmosphere and the like are influenced.

The invention provides a roller with an internal cooling structure for a metallurgical process, which comprises a roller sleeve, a mandrel, a cooling loop and the like, wherein the roller sleeve is internally provided with cooling grooves which are distributed in parallel in the circumferential direction, and the mandrel is internally provided with an axial cooling loop and a radial cooling loop.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, provides the roller with the internal cooling structure for the metallurgical process, can be applied to the processes of continuous casting, heating furnace, rolling, heat treatment and the like, and has low cost and wide industrial popularization prospect.

The invention adopts the following technical scheme:

a roller with an internal cooling structure for a metallurgical process comprises a roller sleeve, a mandrel and a cooling loop; the roller sleeve and the mandrel are coaxially assembled, and the roller sleeve is sleeved on the outer surface of the mandrel;

one surface of the roller sleeve, which is in contact with the mandrel, is provided with a cooling groove, and the cooling grooves are distributed in parallel along the axial direction of the mandrel;

the cooling loop is arranged in the mandrel and comprises an axial cooling pipeline and a radial cooling pipeline;

the cooling medium enters the cooling bath through the cooling circuit, flows in the cooling bath with the heat generated by the metallurgical process roll and flows out of the metallurgical process roll through the cooling circuit.

Further, the axial cooling pipeline comprises a main axial inflow pipeline, an axial inflow branch and an axial outflow branch, and the main axial outflow pipeline;

the radial cooling pipeline comprises a main radial inflow pipeline, a radial inflow branch, a radial outflow branch and a main radial outflow pipeline;

and cooling medium enters from the main shaft to the inflow pipeline, sequentially passes through the main radial inflow pipeline, the axial inflow branch and the radial inflow branch and enters the cooling tank, and takes away heat generated by the roller for the metallurgical process and then sequentially flows out along the radial outflow branch, the axial outflow branch, the main radial outflow pipeline and the main shaft to the outflow pipeline.

Further, the inlet end of the main axial inflow pipeline is communicated with the inlet outer pipe through a rotary valve, and the outlet end of the main axial outflow pipeline is communicated with the outlet outer pipe through a rotary valve;

and cooling medium is pumped into the main axial inflow pipeline through a rotary valve along the introduced outer pipe, and finally discharged out of the roller for the metallurgical process through the rotary valve and the introduced outer pipe along the main axial outflow pipeline.

Furthermore, the cooling grooves are segmented in the circumferential direction, the number of the segments is not less than 2, and adjacent cooling groove circumferential segments are separated by seal heads; the cooling medium flows independently between the circumferential sections of the cooling grooves.

Furthermore, the number of the cooling grooves which are distributed in parallel along the axial direction of the mandrel is not less than 1, the groove width of the cooling grooves is 3-50 mm, the groove depth of the cooling grooves is 3-50 mm, and the groove distance is 3-30 mm.

Further, the number of the axial inflow branches and the number of the axial outflow branches are equal to the number of the circumferential sections of the cooling groove; the number of the radial inflow branches and the number of the radial outflow branches are equal to the number of the cooling grooves which are distributed in parallel along the axial direction of the mandrel.

Furthermore, the main axial inflow pipeline and the main axial outflow pipeline are both arranged at the same end of the mandrel, or are respectively arranged at two ends of the mandrel.

Further, when the roller sleeve is assembled, the medium inflow end of the roller sleeve corresponds to a radial inflow branch of the cooling circuit of the mandrel, and the medium outflow end of the roller sleeve corresponds to a radial outflow branch of the cooling circuit of the mandrel.

Furthermore, rotary joints are arranged at the contact positions of the spindle axial inflow pipeline and the spindle axial outflow pipeline and the mandrel, and when the spindle axial inflow pipeline and the spindle axial outflow pipeline are arranged at the same end of the mandrel, the rotary joints adopt a double-way type; when the main axial inflow pipeline and the main axial outflow pipeline are respectively arranged at two ends of the mandrel, the rotary joint adopts a single-way type.

Further, the roller sleeve is made of heat-resistant steel, high-temperature alloy or ceramic; the outer part of the roller sleeve is hardened by adopting a surfacing welding, laser cladding or additive manufacturing method, and the inner part of the roller sleeve is processed into a cooling groove structure which is distributed in parallel in the circumferential direction; the mandrel is made of metal or alloy, the outside of the mandrel is in contact with the roller sleeve and is coaxially assembled, and the supporting and fixing effects on the roller sleeve are achieved.

Furthermore, the sections of the main axial inflow pipeline, the main radial inflow branch, the main radial outflow branch and the main radial outflow pipeline are circular, elliptical or polygonal, and the diameter of the section or the diameter of an equivalent circle is 10-50 mm.

Furthermore, the roller for the metallurgical process can be used as a continuous casting roller in the metallurgical industry, such as a single-section or multi-section foot roller, a clamping roller, a pulling and straightening roller, a guide roller and the like; rolls for heating furnaces such as guide rolls, drive rolls, etc.; rolls for rolling such as work rolls, back-up rolls, guide rolls; the heat treatment rolls include guide rolls inside and outside the furnace, drive rolls, and the like.

Further, the cooling medium is liquid or gas which has fluidity and is lower in temperature than the roller body, and the flow rate of the cooling medium is controllable.

The invention has the beneficial effects that: the core cooling structure has the characteristics of circumferential segmentation and axial parallelism, and the cooling groove is processed on the roller sleeve, so that the cooling area is large, and the cooling effect on the roller surface is strong; the distance between the cooling grooves is adjustable, and the supporting effect of the mandrel on the roller sleeve is large; the cooling groove is short in length, and the flow speed of the cooling medium is large in controllable range. Meanwhile, the cooling medium of the cooling roller in the invention can flow in from any end of the mandrel, and flow out from the same end or the other end after flowing through the cooling loop and the cooling tank, the structure of the cooling roller can be connected with a motor to be used as a driving roller, a pulling and straightening roller, a guide roller and the like, and can also be used as a guide roller or a support roller without driving, the cooling roller can be applied to a plurality of metallurgical processes such as continuous casting, a heating furnace, rolling, heat treatment and the like, the design, operation and maintenance cost is low, and the cooling.

Drawings

FIG. 1 is a schematic sectional view showing a metallurgical process roll (an opposite-end in-out type double-circuit single-segment roll) with an internal cooling structure in example 1.

FIG. 2 is a schematic cross-sectional view of the double-link roller of example 2 (different end inlet and outlet type).

Fig. 3 shows a schematic cross-section a-a of fig. 1 and 2.

FIG. 4 is an axial view showing the embodiment 3 (the different end in-out type four-circuit roller).

FIG. 5 is a schematic sectional view showing the structure of the double-circuit roll of example 4 (same-side entry/exit type).

In the figure, 1- (cooling medium) is passed into the outer tube; 2-rotating the valve; 3-a bearing; 4-mandrel; 5-roller sleeve; 6-cooling the tank; 7-main axial inflow line; 8-a main radial inflow conduit; 9-axial inflow branch; 10-radial inflow branch; 11-radial outflow branch; 12-axial outflow branch; 13-main radial outflow lines; 14-main axial outflow line; 15- (cooling medium) out of the outer tube; 16-mandrel drive section; and 17-sealing the head.

Detailed Description

Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that technical features or combinations of technical features described in the following embodiments should not be considered as being isolated, and they may be combined with each other to achieve better technical effects. In the drawings of the embodiments described below, the same reference numerals appearing in the respective drawings denote the same features or components, and may be applied to different embodiments.

Without loss of generality, the invention is further illustrated by the following examples.