阅读说明：本技术 塞杆和用于在塞杆周围提供均匀的气体帘幕的方法 (Plug rod and method for providing a uniform gas curtain around the plug rod ) 是由 G·哈克尔 W·费尔纳 于 2020-01-28 设计创作，主要内容包括：本发明涉及用于在熔融金属的铸造期间控制熔融金属的流动并用于供应气体的塞杆和在塞杆周围提供均匀的气体帘幕的方法。(The present invention relates to a stopper rod for controlling the flow of molten metal and for supplying gas during casting of the molten metal and a method of providing a uniform curtain of gas around the stopper rod.)

1. A stopper rod (100) for controlling the flow of molten metal and for supplying gas during casting of the molten metal, the stopper rod (100) comprising:

1.1 rod-shaped plug body (101), the rod-shaped plug body (101)

1.1.1 extending along a central longitudinal axis (L) from a first end (105) to a second end (107),

1.1.2 the rod-shaped plug body (101) defines a nose portion (103) adjacent the second end portion (107), wherein

1.1.3 the nose (103) providing an outer surface;

1.2 Chamber (109), said Chamber (109)

1.2.1 extends along the central longitudinal axis (L) from the first end (105) towards the second end (107) into the plug body (101) and ends at a distance from the second end (107);

1.3 channels (111), said channels (111)

1.3.1 is disposed on the outer surface of the nose (103), and

1.3.2 about the longitudinal axis (L);

1.4 gas supply means (123), said gas supply means (123)

1.4.1 from the chamber (109) and through the rod-shaped plug body (101) into the channel (111).

2. The stopper rod (100) of claim 1, wherein the channel (111) forms a ring.

3. Stopper rod (100) according to at least one of the preceding claims, wherein the outer surface of the nose (103) is rotationally symmetric with respect to the longitudinal axis (L).

4. Stopper rod (100) according to at least one of the preceding claims, wherein the channel (111) comprises a first channel wall (113) bounding the channel (111) in a direction towards the first end (105), wherein the first channel wall (113) and the outer surface of the nose (103) form a first edge (119), and wherein the first edge (119) has the shape of a sharp edge.

5. The stopper rod (100) of claim 4, wherein the first edge (119) has a radius of no more than 1 mm.

6. Stopper rod (100) according to at least one of claims 4 to 5, wherein the channel (111) comprises a second channel wall (115) delimiting the channel (111) in a direction towards the second end (107), wherein the second channel wall (115) and the outer surface of the nose (103) form a second edge (121), and wherein the distance between the first edge (119) and the second edge (121) is in the range from 2 to 30 mm.

7. Stopper rod (100) according to at least one of the preceding claims, wherein the channel (111) has a depth in the range from 4 to 15 mm.

8. Stopper rod (100) according to at least one of the preceding claims, wherein the channel (111) has a depth in the range from 6 to 12 mm.

9. Stopper rod (100) according to at least one of the preceding claims, wherein said channel (111) has a diameter of from 2 to 225 mm²Cross-sectional area in the range of (1).

10. Stopper rod (100) according to at least one of the preceding claims, wherein the gas supply means (123) is a plurality of gas supply lines (123), wherein each of the gas supply lines (123) leads into the channel (111) at one area, wherein the areas are spaced apart from each other.

11. The stopper rod (100) of claim 10, wherein the regions are symmetrically spaced from each other.

12. Stopper rod (100) according to at least one of the claims 10 to 11, having a total number of gas supply lines (123) in the range from 2 to 10.

13. Stopper rod (100) according to at least one of the claims 10 to 12, wherein the chambers (109) have a cross-sectional area and wherein each of the gas supply lines (123) has a cross-sectional area and wherein the cross-sectional area of the chambers (109) is larger than the total area of all the cross-sectional areas of the gas supply lines (123).

14. Stopper rod (100) according to at least one of the preceding claims, wherein the stopper body (101) is made of a refractory ceramic material.

15. A method for providing a uniform curtain of gas around a stopper rod, the method comprising:

A. providing a stopper rod (100) according to at least one of the preceding claims;

B. introducing a gas into the chamber (109).