CN2359029Y

CN2359029Y - High-effecient energy-saving pipe die

Info

Publication number: CN2359029Y
Application number: CN 98250641
Authority: CN
Inventors: 李洪霞; 张鸿羽
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-12-25
Filing date: 1998-12-25
Publication date: 2000-01-19
Anticipated expiration: 2008-12-25

Abstract

The utility model relates to a high efficient energy saving pipe die used in a centrifugal cast pipe. Most part of the outer surface of a pipe die is orderly provided with sliver-shaped heat radiating bulges, the sliver-shaped heat radiating bulges in each local section or the whole pipe die are mutually parallel, and the height is between 2 mm and 30 mm. the heat radiating area of the pipe die can be obviously increased, the flowability of air of the peripheral surface can be increased, and the heat radiating speed can be increased; thereby, the production efficiency is improved, the service life of an apparatus can be extended, the production cost can be reduced, and the quality of the cast pipe can be improved.

Description

The high-efficiency and energy-saving type pipe die

The utility model relates to a kind of auxiliary device of centrifugal casting, particularly a kind of in spun cast pipe is produced used pipe die.

At present, in spun cast pipe was produced, pipe die drove rotation at a high speed by support roller, and the molten iron that injects pipe die is evenly distributed on the pipe die inwall under centrifugal action.Because of the molten iron of high temperature is mobile, the moving state of semi-fluid, shape changes at any time.Have only the molten iron of working as to solidify fully, just can stop the rotation of pipe die, and by wherein extracting cast tube.Owing to water the molten iron in pipe die, be closed in basically among the pipe die, the curing latent heat that its process of setting distributed will be transferred to pipe die earlier, and the heat exchange by pipe die and environment distributes again.Existing pipe die, its outer wall mostly are the smooth face of cylinder, and corresponding heat exchange area is less, and minimum to the perturbation of heat transfer medium (as air) in the pipe die rotation, and therefore existing pipe die heat radiation is very slow.Because the latent heat that gives out during molten steel solidification distributes slowly, molten steel solidification is also slow, in order to guarantee the cast tube Forming Quality, must drive the long-time rotation at a high speed of pipe die at the cast rear motor, not only power consumption is bigger, and the wearing and tearing of support roller, bearing and pipe die are all bigger, and can bring the pipe die distortion, and the cost of pipe die is very high.Above situation causes cast tube production efficiency lower, and production cost strengthens.And because of the molten iron cooling velocity decaying spheroidisation phenomenon can occur too slowly, influence the cast tube quality, therefore improve the radiating rate of pipe die effectively, can not only directly enhance productivity, and can reduce equipment attrition, prolong its service life, energy savings, thereby reduce production costs, can guarantee the cast tube quality simultaneously.

The purpose of this utility model is to provide a kind of high-efficiency and energy-saving type pipe die, and this pipe die can improve the pipe die radiating rate, thereby can enhance productivity, and reduces equipment attrition, increase the service life, thereby energy savings reduces production costs and improves the cast tube quality.

Goal of the invention of the present utility model is achieved by the following technical solution: most of outer surface is being arranged strip heat radiation projection in an orderly manner on pipe die, and the strip heat radiation projection in each partial section is parallel to each other, and the height of heat radiation projection should be between 2～30mm

The energy-efficient pipe die of the utility model is being arranged strip heat radiation projection in the major part of outer surface, has replaced the smooth face of cylinder of original pipe die, thereby has increased the area of dissipation of pipe die significantly, has improved radiating rate.And strip heat radiation projection produces the perturbation action to heat eliminating medium (as air) in the pipe die rotation, has improved the flowability of air, can further improve the radiating rate of pipe die again.The pipe die heat radiation is accelerated to reduce the pipe die surface temperature, improves molten steel solidification speed, shortens the time that the driven by motor pipe die rotates at a high speed.The corresponding like this power consumption that reduced, the wearing and tearing of parts of appliance such as motor and pipe die have also weakened the factor that makes the pipe die distortion, thereby have prolonged the service life of equipment.Therefore use this equipment, can improve the production efficiency of spun cast pipe, reduce production costs, the decaying spheroidisation phenomenon is improved, improve the quality of cast tube.The cost of pipe die is very high, particularly the heavy caliber pipe die.Therefore all be to be center of gravity in the design with the intensity that improves pipe die, thereby increase the service life.Traditional design idea thinks that smooth bumps is few more more to have only the pipe die surface, and stress raisers are few more, just can improve the intensity of pipe die.Therefore consider to add the heat radiation projection from unmanned, to enlarge heat exchange area in the pipe die appearance.The state during but this traditional idea is not used pipe die is done careful analysis.Pipe die gives heat earlier before use to about 200 °, and after pouring molten iron, pipe die inner surface heat stress is very big, and inwall is in yield situation, and intensity is very low.The skin that has only close outer surface is cryosphere, and its mechanical properties value is higher relatively, and proportion is bigger in the pipe die overall strength.So, when the area of pipe die outer surface heat radiation strengthens, dispel the heat and accelerate, the pipe die surface temperature is reduced, the cryosphere thickening of ecto-entad, then the intensity of pipe die can improve.By contrast, the concentrated factor of stress becomes less important.The projection of being dispelled the heat is arranged uniform sequentially and can be weakened the influence that stress is concentrated.The height of heat radiation projection is controlled within limits, the too high intensity that can reduce the heat radiation projection, the air drag in the running of increase pipe die increases energy resource consumption.

The utility model is described in further detail below in conjunction with accompanying drawing.

Fig. 1 is the structural representation of the utility model high-efficiency and energy-saving type pipe die

The pipe die that Fig. 2 has the heat radiation projection of different directions for each section of the utility model

Fig. 3 builds the pipe die schematic cross-section of formula heat radiation projection for the utility model flower

Fig. 4 is the pipe die of the utility model annular heat radiation projection

Embodiment:

Fig. 1 is the partial cutaway diagrammatic sketch of this high-efficiency and energy-saving type pipe die, as common pipe die, the one end is a bellmouth 3, the middle part is provided with by rolling of support roller support and is with 2, arrange strip heat radiation projection 1 in an orderly manner at most of outer surface of pipe die, the strip of each partial section gesture projection of loosing is as shown in Figure 2 parallel to each other, or make the rectangular table heat radiation projection of whole pipe die appearance parallel to each other help as Fig. 1 shown in Figure 4, the height of heat radiation projection should be between 2～30mm, and its height strengthens with the increasing face of pipe die Guan Jing.At the outer surface of pipe die shown in Figure 2, the direction of the set rectangular table heat radiation of its each section projection have nothing in common with each other (only the protrusion direction unanimity in each section scope is parallel to each other).A, B, C are each strip projection and the formed different angles of pipe die axial line among the figure.Strip heat radiation eyeball shown in Figure 4 works the annular that is around the pipe die cylindrical; The protruding shape in the shape of a spiral of strip heat radiation shown in Figure 1 is surrounded on the axis direction unanimity of pipe die, is spline-like and is distributed on the pipe die cylindrical.Because of pipe die bellmouth position is provided with core, the core bellmouth is bearing big Zhi Dingli, can make the heat radiation projection at bellmouth position be annular around pipe die, and the heat radiation projection at other position is shape formula spline-like in the shape of a spiral.

Claims

1, a kind of for the energy-efficient shape pipe die that uses in the spun cast pipe production, it is characterized in that: the most of outer surface of pipe die is arranged strip heat radiation projection in an orderly manner, strip heat radiation projection in each partial section is parallel to each other, or making the strip heat radiation projection of whole pipe die appearance parallel to each other, the height of heat radiation projection should be between 2～30mm.

2, high-efficiency and energy-saving type pipe die according to claim 1 is characterized in that: described strip heat radiation projection is the annular around the pipe die cylindrical.

3, high-efficiency and energy-saving type pipe die according to claim 1 is characterized in that: described strip heat radiation projection shape in the shape of a spiral is surrounded on the cylindrical of pipe die.

4, the main energy-saving pipe die of imitating according to claim 1 is characterized in that: described strip heat radiation projection is consistent with the axis direction of pipe die, is spline-like and is distributed on the pipe die cylindrical.

5, high-efficiency and energy-saving type pipe die according to claim 1 is characterized in that: the heat radiation projection at described pipe die bellmouth position is the annular around pipe die, and the heat radiation projection at other position is shape formula spline-like in the shape of a spiral.