CN214977729U - Casting tube with expansion cavity - Google Patents

Abstract

The utility model provides a casting tube with expansion chamber, includes the body of one end confined, is equipped with the sprue gate in the both sides of body blind end, and the sprue gate sets up with two narrow limits of casting blank respectively relatively, the play liquid end of sprue gate is equipped with the expansion chamber, and the cross sectional area in expansion chamber is greater than the cross sectional area of sprue gate. The utility model discloses after pouring mouth department and setting up the expansion chamber, the mouth that has reduced the casting gate objectively is dark, is favorable to reducing the directional acceleration effect to the copper liquid stream. More importantly, the flow velocity of the copper liquid stream is reduced, the cross section area of the copper liquid stream is increased, the copper liquid stream is scattered, and the impact strength is reduced, so that the impact on the narrow edge of the casting blank is reduced. Furthermore, the utility model discloses can also change the flow direction of copper liquid stream, make the temperature distribution of copper liquid in the crystallizer even, reduce the formation of pressing from both sides defects such as sediment and gas pocket, guarantee the casting quality of ingot casting.

Description

Casting tube with expansion cavity

Technical Field

The utility model belongs to the technical field of the founding technique and specifically relates to a casting tube with expansion chamber is related to.

Background

In the production process of continuous or semi-continuous copper and copper alloy cast ingots, copper liquid in a casting furnace needs to flow into a crystallizer through a casting pipe, and the casting of oxygen-free copper cast ingots is completed through the cooling of the crystallizer and the traction of the casting machine. The main function of the casting pipe is to change the flowing state of the copper liquid stream in the crystallizer and disperse the heat brought by the copper liquid stream.

As shown in fig. 1, the prior casting pipe 6 has a structure that horizontal circular casting ports 2 are formed at both sides of the bottom of the pipe cavity, which has problems in that: firstly, the flow velocity of the copper liquid stream is large, the density is high, strong impact is generated on the narrow edge of the solidified casting blank 4, and the formation and growth of the solidified shell of the narrow edge of the casting blank are not facilitated; secondly, the impact surface of the copper liquid stream is small, but the impact depth is large, so that the temperature distribution of the copper liquid 5 in the crystallizer 3 is uneven, the discharge of gas and impurities is blocked, the defects of slag inclusion and air holes are easily formed in the cast ingot, and the quality of the cast ingot is influenced. The reason for the above problems is that: firstly, because the casting gate is horizontally arranged, the copper liquid stream impacts the narrow edge of the casting blank in the shortest path; secondly, the sprue gate has a directional acceleration effect on the copper liquid stream, like the difference between the rifle barrel and the pistol barrel, the greater the gate depth is, the stronger the directional acceleration effect on the copper liquid stream is, and the greater the formed impact depth is.

In summary, the key to solving the problem is: the path of the copper liquid stream reaching the narrow edge of the casting blank is prolonged, and the directional acceleration effect of the casting opening on the copper liquid stream is reduced.

SUMMERY OF THE UTILITY MODEL

In order to overcome the not enough among the background art, the utility model discloses a casting tube with expansion chamber adopts following technical scheme:

the utility model provides a casting tube with expansion chamber, includes one end confined body, is equipped with the casting gate in the both sides of body blind end, and the casting gate sets up characterized by with two narrow limits of casting blank respectively relatively: and an expansion cavity is arranged at the liquid outlet end of the casting opening, and the sectional area of the expansion cavity is larger than that of the casting opening.

According to the technical scheme, the cross section of the casting opening is circular or rectangular.

The technical scheme is further improved, and the expansion cavity is a counter bore or a sinking platform.

The technical scheme is further improved, and the cross section area of the liquid outlet end of the counter bore or the counter sink is larger than that of the liquid inlet end of the counter bore or the counter sink.

According to the technical scheme, the expansion cavity is an annular groove.

The technical scheme is further improved, the included angle between the upper groove edge of the annular groove and the cross section of the pipe body is alpha, alpha is more than or equal to 0 degree and less than or equal to 60 degrees, the included angle between the lower groove edge and the cross section of the pipe body is beta, and beta is more than or equal to 0 degree and less than or equal to 60 degrees.

The technical scheme is further improved, two casting openings are arranged on each side, and the central lines of the two casting openings on the same side are intersected at the periphery of the pipe body.

According to the technical scheme, the central line of the casting opening is inclined upwards or downwards.

The technical scheme is further improved, and the central line of the casting opening is not intersected with the central line of the pipe body.

Further improve technical scheme, the blind end of body is equipped with the chamfer.

Owing to adopt above-mentioned technical scheme, compare the background art, the utility model discloses following beneficial effect has:

the utility model discloses after pouring mouth department and setting up the expansion chamber, the mouth that has reduced the casting gate objectively is dark, is favorable to reducing the directional acceleration effect to the copper liquid stream. More importantly, the flow velocity of the copper liquid stream is reduced, the cross section area of the copper liquid stream is increased, the copper liquid stream is scattered, and the impact strength is reduced, so that the impact on the narrow edge of the casting blank is reduced.

The utility model discloses can also change the flow direction of copper liquid stream, the temperature distribution of copper liquid in the messenger crystallizer is even, reduces the formation of pressing from both sides sediment and gas pocket defect, has guaranteed the casting quality of ingot casting.

Drawings

FIG. 1 is a schematic view of a conventional casting tube.

Fig. 2 is a schematic structural diagram of the present invention.

Fig. 3 is a schematic structural view of the expansion chamber in a frustum shape.

Figures 4-6 are schematic views of the structure of the expansion chamber when it is in the form of a ring groove.

In the figure: 1. a pipe body; 2. a casting gate; 3. a crystallizer; 4. solidifying a casting blank; 5. copper liquid; 6. existing casting tubes; 7. the lumen is expanded.

Detailed Description

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. It should be noted that in the description of the present invention, the terms "front", "back", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate directions or positional relationships based on those shown in the drawings, which are merely for convenience of description, but do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

A casting pipe with an expansion cavity is shown in figure 2 and comprises a pipe body 1 with one closed end, wherein two sides of the closed end of the pipe body 1 are respectively provided with a round hole-shaped casting opening 2, and the two casting openings 2 are respectively opposite to two narrow edges of a casting blank. A counter bore-shaped expansion cavity 7 is arranged at the liquid outlet end of the casting opening 2, wherein the cross-sectional area of the expansion cavity 7 is larger than that of the casting opening 2.

As can be seen from FIG. 2, after the expansion cavity 7 is arranged, the opening depth of the casting opening 2 is objectively reduced, which is beneficial to reducing the directional acceleration effect on the molten copper stream. More importantly, according to the bernoulli principle, when the fluid enters the side with the large cross-sectional area from the side with the small cross-sectional area, the flow velocity of the fluid is reduced, and the pressure of the fluid is increased, so that the flow velocity of the copper liquid stream is reduced. In addition, the expansion cavity 7 also increases the cross-sectional area of the copper liquid stream and reduces the impact strength, thereby reducing the impact on the narrow edge of the casting blank.

As shown in fig. 3, the expansion cavity 7 is frustum-shaped, and the cross-sectional area of the liquid outlet end is larger than that of the liquid inlet end. This is in fact a further application of the bernoulli principle and produces scattering of the copper stream, further reducing the impact on the narrow edges of the cast slab. As can be seen from fig. 3, the closed end of the tube 1 is provided with a chamfer, which is beneficial to the upward flow of the molten copper 5 between the bottom of the tube 1 and the solidified casting blank 4, so that the temperature distribution of the molten copper 5 in the crystallizer 3 is uniform, and the discharge of gas and impurities is facilitated. After the measures are taken, the crystal face of the solidified casting blank 4 extends towards the narrow edge of the casting blank to form a solidified shell with a better shape, the formation of slag inclusion and air hole defects is reduced, and the casting quality of the cast ingot is ensured.

It should be understood that the cross-sectional shape of the casting opening 2 may also be rectangular or other shapes, and correspondingly, the expansion chamber 7 may also be rectangular truncated cone, quadrangular frustum or other shapes.

As shown in fig. 4, the expanding cavity 7 is in the shape of a ring groove, the included angle α between the upper groove edge of the ring groove and the cross section of the pipe body 1 is 35 °, and the included angle β between the lower groove edge and the cross section of the pipe body 1 is 15 °, which is designed to adjust and distribute the flow direction of the copper liquid stream. If the included angle α is larger than the included angle β, it means that the amount of upward diversion of the molten copper 5 flowing out from the casting opening 2 is larger than the amount of downward diversion, which is beneficial to adjusting the temperature of the molten copper 5 in the crystallizer 3 according to different conditions, so that the molten copper is more uniform.

As shown in fig. 5, the central line of the casting opening 2 is inclined upwards, so that the upward diversion amount of the copper liquid flow is far larger than the downward diversion amount, and the damage of the high-temperature copper liquid flow to the edge part of the solidified shell of the casting blank is reduced; the method has the disadvantages that disturbance to the bottom copper liquid 5 is reduced, and temperature unevenness is easily caused. Similarly, the central line of the casting opening 2 can also be inclined downwards, so that the downward flow distribution amount of the copper liquid stream is far greater than the upward flow distribution amount, and the method has the advantages of increasing the disturbance to the bottom copper liquid 5 and reducing the defects of slag inclusion, air holes and the like caused by uneven temperature; the method has the defect that the solidified shell of the casting blank is damaged at the edge and the bottom by the increased high-temperature copper liquid stream. Therefore, the inclination direction and the inclination angle of the center line of the casting nozzle 2 need to be properly selected according to specific situations.

According to the casting condition, the casting openings 2 on the two sides of the pipe body 1 can be arranged in a plurality of manners, on the premise that the total injection amount of the copper liquid 5 is guaranteed, the liquid outlet amount of each casting opening 2 can be reduced by arranging the plurality of casting openings 2, so that the copper liquid streams can dispersedly flow, the centralized impact on the narrow sides of the casting blank is reduced, and the temperature distribution of the copper liquid 5 in the crystallizer 3 is more uniform.

As shown in fig. 6, two casting ports 2 are provided on both sides of the pipe body 1, and the center lines of the two casting ports 2 on the same side intersect at the periphery of the pipe body 1. As can be seen, the streams of molten copper flowing from the two casting openings 2 will impinge at the intersection point, thereby generating scattering. Therefore, on the premise of ensuring the total injection amount of the copper liquid 5, even if the copper liquid flow generates dispersed flow, the impact kinetic energy of the copper liquid flow is reduced, so that the impact on the narrow edge of the casting blank is further reduced.

The part of the utility model not detailed is prior art. Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. The utility model provides a casting tube with expansion chamber, includes one end confined body, is equipped with the casting gate in the both sides of body blind end, and the casting gate sets up characterized by with two narrow limits of casting blank respectively relatively: and an expansion cavity is arranged at the liquid outlet end of the casting opening, and the sectional area of the expansion cavity is larger than that of the casting opening.

2. The casting tube with an expansion chamber of claim 1, wherein: the cross section of the casting opening is circular or rectangular.

3. A casting tube with an expansion chamber according to claim 1 or 2, characterized in that: the expansion cavity is a counter bore or a sinking platform.

4. A casting tube with an expansion chamber according to claim 3, characterized in that: the cross section area of the liquid outlet end of the counter bore or the counter sink is larger than that of the liquid inlet end of the counter bore or the counter sink.

5. A casting tube with an expansion chamber according to claim 1 or 2, characterized in that: the expansion cavity is a ring groove.

6. The casting tube with an expansion chamber according to claim 5, wherein: the included angle between the upper groove edge of the annular groove and the cross section of the pipe body is alpha, alpha is more than or equal to 0 degree and less than or equal to 60 degrees, the included angle between the lower groove edge and the cross section of the pipe body is beta, and beta is more than or equal to 0 degree and less than or equal to 60 degrees.

7. The casting tube with an expansion chamber of claim 1, wherein: the casting openings on each side are two, and the central lines of the two casting openings on the same side are intersected at the periphery of the pipe body.

8. The casting tube with an expansion chamber of claim 1, wherein: the centre line of the pouring gate is inclined upwards or downwards.

9. A casting tube having an expansion chamber according to claim 1 or 8, wherein: the central line of the casting opening is not intersected with the central line of the pipe body.

10. The casting tube with an expansion chamber of claim 1, wherein: the closed end of the tube body is provided with a chamfer.

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