A multi-segment linear nozzle along the thickness direction of the skateboard

Abstract

The present invention discloses a multi-segment linear nozzle along the thickness direction of a slide plate, which includes a plate-shaped part formed with a first through hole and a tubular part formed with a second through hole, and the first through hole and the second through hole constitute a casting channel; the plate-shaped part has a first surface, a second surface, a first side surface, a second side surface, a third side surface and a fourth side surface, the first surface and the second surface are two opposite surfaces and the second surface is adjacent to the tubular part; the first side surface and the second side surface are two opposite side surfaces, and the third side surface and the fourth side surface are two opposite side surfaces; at least one supporting sliding plane and one clamping surface are provided on the third side surface and the fourth side surface, and the included angle between the supporting sliding plane and the clamping surface is greater than 0°; the clamping surface is distributed on one side or both sides of the supporting sliding plane along the thickness direction of the plate-shaped part. The present invention solves the problems of large stress around the casting channel of the plate-shaped part and at the nozzle neck during the use of the nozzle and short nozzle life.

Description

Technical Field

[0001] The present invention relates to the technical field of casting nozzles. Specifically, it is a multi-segment linear nozzle along the thickness direction of the slide plate. Background Art

[0002] The nozzles in the prior art generally include a plate-shaped part and a tubular part, and both the plate-shaped part and the tubular part are provided with a casting channel for fluid conduction.

[0003] For the nozzle, when molten steel flows through the casting port or the casting channel, the nozzle not only bears the impact force of the molten metal, but also due to the rapid increase in the nozzle temperature from room temperature and the subsequent decrease in temperature after casting stops, large thermo-mechanical stresses will be generated in the nozzle. In addition, during the process of replacing a new nozzle, when the nozzle is independent or installed on the slide plate frame and slides on the slide rail, frictional stresses will be generated due to the sliding (including the frictional stress between the upper and lower slide plates and the sliding force between the slide plate and the quick-change mechanism), especially when the nozzle is in direct contact with the slide rail; the nozzle will also be subjected to large compressive stresses during operation, for example, the clamping force of the metal shell on the nozzle slide plate and the force applied by the quick-change mechanism to keep the upper and lower slide plates sealed. The existence and combined action of these stresses will cause cracks in the nozzle, reducing its service life.

[0004] With the rapid development of continuous casting technology and the continuous improvement of high-efficiency continuous casting machines, the service life of the continuous casting tundish directly affects the improvement of the operation rate of the continuous casting machine. At present, steel mills have adopted methods to extend the service life of the tundish, but limited by the nozzle life, the effect of long-term continuous casting still cannot be achieved. The quick-change nozzle technology effectively solves this problem. The two opposite sides of the quick-change nozzle are in direct contact with the slide rail and slide on the slide rail, and are fixed by the top block on the slide rail under the action of a spring.

[0005] Since the quick-change nozzle is subjected to various stresses during replacement and use, these stresses not only easily cause cracks in the plate-shaped part and the nozzle neck of the nozzle, but may also cause the plate-shaped part and the nozzle neck to break due to cracks during use, which is extremely unfavorable to the service life and use safety of the nozzle; and compared with the nozzle installed in the slide plate frame, cracks are more likely to occur at the junction of the tubular part and the plate-shaped part in the plate-shaped part. Therefore, it is necessary to optimize the design of the plate-shaped part structure in order to effectively reduce the stresses around the casting channel of the plate-shaped part and the stress at the nozzle neck, thereby extending the nozzle life. Summary of the Invention

[0006] Therefore, the technical problem to be solved by the present invention is to provide a multi-segment linear nozzle along the thickness direction of the slide plate to solve the problems of large stresses around the casting channel of the plate-shaped part and at the nozzle neck during the use of the nozzle and short nozzle life. This nozzle of the present invention can also be used as the upper nozzle of a ladle or a tundish.

[0007] To solve the above technical problems, the present invention provides the following technical solutions:

[0008] A multi-segment linear nozzle along the thickness direction of the slide plate, comprising a plate-shaped part formed with a first through hole and a tubular part formed with a second through hole, wherein the first through hole and the second through hole form a casting channel;

[0009] The plate-shaped part has a first surface, a second surface, a first side surface, a second side surface, a third side surface and a fourth side surface. The first surface and the second surface are two opposite surfaces, and the second surface is the surface adjacent to the tubular part; the first side surface and the second side surface are two opposite side surfaces, and the third side surface and the fourth side surface are two opposite side surfaces; the third side surface and the fourth side surface at least have:

[0010] A supporting sliding plane and a clamping surface, and the included angle between the supporting sliding plane and the clamping surface is greater than 0°; the included angle α1 between the supporting sliding plane and a first plane perpendicular to the casting channel is greater than 0 and less than 90°; the supporting sliding plane faces the casting channel or the adjacent area around the casting channel, and the clamping surface also faces the casting channel or the adjacent area around the casting channel;

[0011] The clamping surface is distributed on one side or both sides of the supporting sliding plane along the thickness direction of the plate-shaped part.

[0012] For the above multi-segment linear nozzle along the thickness direction of the slide plate, the clamping surface is one or an even number, or can also be an odd number greater than or equal to 3. Preferably, it is an even number, so as to achieve a better clamping effect and better solve the problems of large stress around the casting channel of the plate-shaped part and large stress at the neck of the nozzle and short nozzle life during the use of the nozzle; when the clamping surface is an even number: assume that one of the planes perpendicular to and bisecting the supporting sliding plane and intersecting the casting channel is the second plane, the clamping surfaces on the third side surface are mirror-symmetrical about the second plane, and the clamping surfaces on the fourth side surface are also mirror-symmetrical about the second plane; one of the planes parallel to the casting channel, intersecting the first side surface and bisecting the plate-shaped part is the third plane, and the fourth side surface and the third side surface are mirror-symmetrical about the third plane.

[0013] For the above multi-segment linear nozzle along the thickness direction of the slide plate, the clamping surface is a planar clamping surface or a curved clamping surface, and the included angle between the clamping surface and a first plane perpendicular to the casting channel is greater than 0 and less than 90°.

[0014] For the multi-segment linear nozzle along the thickness direction of the slide plate, when the clamping surface is a curved clamping surface: the curved clamping surface is a folded surface or an arc surface that bends along the circumference of the casting channel and / or bends along the thickness direction.

[0015] For the multi-segment linear nozzle along the thickness direction of the slide plate, the included angle α21 between the first clamping surface adjacent to the first surface and the first plane perpendicular to the casting channel is greater than the included angle α22 between the second clamping surface adjacent to the second surface and the first plane perpendicular to the casting channel.

[0016] For the multi-segment linear nozzle along the thickness direction of the slide plate, when there are two planar clamping surfaces distributed along the thickness direction of the plate-shaped part on both sides of the supporting sliding plane; the included angle β4 between the planar clamping surface and the supporting sliding plane is 150 - 179°;

[0017] The length L1 of the planar clamping surface adjacent to the first surface along the thickness direction of the plate-shaped part is 7 mm; the length L3 of the planar clamping surface adjacent to the second surface along the thickness direction of the plate-shaped part is 8 mm; the length L2 of the supporting sliding plane along the thickness direction of the plate-shaped part is 8 mm.

[0018] For the multi-segment linear nozzle along the thickness direction of the slide plate, when there is one planar clamping surface along the thickness direction of the plate-shaped part on one side of the supporting sliding plane, the included angle β4 between the planar clamping surface and the supporting sliding plane is 150 - 179°; the length L1 of the planar clamping surface along the thickness direction of the plate-shaped part is 12 mm; the length L2 of the supporting sliding plane along the thickness direction of the plate-shaped part is 12 mm.

[0019] For the multi-segment linear nozzle along the thickness direction of the slide plate, the clamping surfaces are also distributed on both sides of the supporting sliding plane along the direction around the casting channel.

[0020] For the multi-segment linear nozzle along the thickness direction of the slide plate, the number of clamping surfaces distributed on both sides of the supporting sliding plane along the direction around the casting channel is at least two, four or six.

[0021] For the multi-segment linear nozzle along the thickness direction of the slide plate, for the clamping surfaces distributed on both sides of the supporting sliding plane along the direction around the casting channel:

[0022] When the clamping surfaces are two planar clamping surfaces and are symmetrically distributed on both sides of the supporting sliding plane: the included angle β1 between the planar clamping surface and the supporting sliding plane is 120 - 175°;

[0023] When the clamping surfaces are four planar clamping surfaces and symmetrically distributed on both sides of the supporting sliding plane: the angle γ1 between two adjacent planar clamping surfaces is 150 - 179°, and the angle β2 between the planar clamping surface and the supporting sliding plane is 150 - 179°;

[0024] When the clamping surfaces are six planar clamping surfaces and symmetrically distributed on both sides of the supporting sliding plane: the angle γ2 between two adjacent planar clamping surfaces is 150 - 179°, and the angle β3 between the planar clamping surface and the supporting sliding plane is 150 - 179°.

[0025] For the multi-segment nozzle along the thickness direction of the slide plate, for the clamping surfaces distributed along the circumferential direction of the casting channel on both sides of the supporting sliding plane:

[0026] When the clamping surfaces are two planar clamping surfaces and symmetrically distributed on both sides of the supporting sliding plane: the width W0 of the supporting sliding plane along the circumference of the plate-shaped part is 64 mm, and the widths W1 of the two planar clamping surfaces along the circumference of the plate-shaped part are both 64 mm;

[0027] When the clamping surfaces are four planar clamping surfaces and symmetrically distributed on both sides of the supporting sliding plane: the four planar clamping surfaces are respectively the first planar clamping surface, the second planar clamping surface, the third planar clamping surface and the fourth planar clamping surface; the first planar clamping surface and the second planar clamping surface are adjacent to the supporting sliding plane and symmetrically distributed on both sides of the supporting sliding plane; the third planar clamping surface is adjacent to the first side surface, the fourth planar clamping surface is adjacent to the second side surface, and the third planar clamping surface and the fourth planar clamping surface are symmetrically distributed with respect to the supporting sliding plane; the width W0 of the supporting sliding plane along the circumference of the plate-shaped part is 40 mm, and the widths W1 of the first planar clamping surface and the second planar clamping surface along the circumference of the plate-shaped part are both 50 mm; the widths W2 of the third planar clamping surface and the fourth planar clamping surface along the circumference of the plate-shaped part are both 34 mm;

[0028] When the clamping surfaces are six planar clamping surfaces and symmetrically distributed on both sides of the supporting sliding plane: the six planar clamping surfaces are respectively a first planar clamping surface, a second planar clamping surface, a third planar clamping surface, a fourth planar clamping surface, a fifth planar clamping surface and a sixth planar clamping surface; the first planar clamping surface and the second planar clamping surface are adjacent to the supporting sliding plane and symmetrically distributed on both sides of the supporting sliding plane; the fifth planar clamping surface is adjacent to the first side surface, the sixth planar clamping surface is adjacent to the second side surface, and the fifth planar clamping surface and the sixth planar clamping surface are symmetrically distributed with respect to the supporting sliding plane; the first planar clamping surface is transitioned to the fifth planar clamping surface through the third planar clamping surface; the second planar clamping surface is transitioned to the sixth planar clamping surface through the fourth planar clamping surface; the third planar clamping surface and the fourth planar clamping surface are symmetrically distributed with respect to the supporting sliding plane; the width W0 of the supporting sliding plane in the circumferential direction of the plate-shaped part is 30 mm, and the widths W1 of the first planar clamping surface and the second planar clamping surface in the circumferential direction of the plate-shaped part are both 28 mm; the widths W2 of the third planar clamping surface and the fourth planar clamping surface in the circumferential direction of the plate-shaped part are both 28 mm; the widths W3 of the fifth planar clamping surface and the sixth planar clamping surface in the circumferential direction of the plate-shaped part are both 26 mm.

[0029] For the above multi-segment line-type nozzle along the thickness direction of the slide plate, the length of the first surface in the direction from the first side surface to the second side surface is 205 - 215 mm; the length of the first surface in the direction of the third side surface and the fourth side surface is 195 - 205 mm; the length of the second surface in the direction from the first side surface to the second side surface is 205 - 215 mm; the length of the second surface in the direction of the third side surface and the fourth side surface is 160 - 170 mm; the distance between the first surface and the second surface is 38 - 42 mm; the inner diameter of the casting channel is 80 - 84 mm;

[0030] For the above multi-segment line-type nozzle along the thickness direction of the slide plate, the first side surface and the second side surface are two planes parallel to the casting channel, and the third side surface and the fourth side surface at least further have a transition surface parallel to the casting channel; the transition surface is adjacent to the first surface, and the supporting sliding plane and the clamping surface are both adjacent to the second surface; the first surface and the second surface are two parallel planes; the first surface and the second surface are respectively perpendicular to the first side surface and the second side surface.

[0031] The above-mentioned multi-segment nozzle along the thickness direction of the slide plate, wherein the plate-shaped part and the tubular part are integrally formed, and at least a part of the outer surfaces of the plate-shaped part and the tubular part are coated with a metal shell; at least a part of the outer surface of the tubular part is coated with fiber cotton.

[0032] The technical solution of the present invention has achieved the following beneficial technical effects:

[0033] Through stress-strain simulation tests (modeling CAD digital objects and CAE digital objects, and then analyzing temperature data and stress-strain data), the results show that: compared with the prior art, the nozzle of the present invention with clamping surfaces distributed on one or both sides of the supporting sliding plane along the thickness direction of the plate-shaped part can significantly reduce the equivalent strain of the metal shell and the maximum principal stress of the nozzle during the working process. The multi-segment line structure composed of a planar clamping surface and a supporting sliding plane can reduce the maximum equivalent principal strain of the metal shell, and also reduce the maximum principal stress at the nozzle neck, the maximum principal stress of the plate-shaped part, and the maximum principal stress of the inner wall of the casting channel. In the steel plant test, it is further confirmed that the nozzle of the present invention has a longer service life compared with the currently used nozzles. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 Schematic structural diagram (front view) of the multi-segment nozzle along the thickness direction of the slide plate in Embodiment 1 of the present invention;

[0035] Figure 2 Schematic structural diagram (side view) of the multi-segment nozzle along the thickness direction of the slide plate in Embodiment 1 of the present invention;

[0036] Figure 3 Schematic structural diagram (another side view) of the multi-segment nozzle along the thickness direction of the slide plate in Embodiment 1 of the present invention;

[0037] Figure 4 In Embodiment 1 of the present invention Figure 3 Enlarged part at A;

[0038] Figure 5 In Embodiment 1 of the present invention Figure 3 Enlarged part at B;

[0039] Figure 6 In Embodiment 2 of the present invention Figure 3 Enlarged part at A;

[0040] Figure 7 In Embodiment 2 of the present invention Figure 3 Enlarged part at B;

[0041] Figure 8 Schematic structural diagram (top view) of the multi-segment nozzle along the thickness direction of the slide plate in Embodiment 3 of the present invention;

[0042] Figure 9 Schematic diagram (top view) of the multi-segment linear nozzle along the thickness direction of the slide plate in Embodiment 4 of the present invention;

[0043] Figure 10 Schematic diagram (top view) of the multi-segment linear nozzle along the thickness direction of the slide plate in Embodiment 5 of the present invention;

[0044] Figure 11 Another schematic diagram (side view) of the multi-segment linear nozzle along the thickness direction of the slide plate of the present invention;

[0045] Figure 12 Schematic diagram of the structural simulation process of part of the test in the embodiments of the present invention.

[0046] In the figure, the reference numerals are represented as: 1 - plate-shaped part; 11 - first side surface; 12 - second side surface; 13 - first surface; 14 - second surface; 15 - third side surface; 16 - supporting sliding plane; 17 - fourth side surface; 18 - clamping surface; 19 - transition surface; 20 - first clamping surface; 21 - second clamping surface; 2 - tubular part; 3 - casting channel; 4 - metal shell; 5 - fiber cotton. Detailed implementation manners

[0047] Embodiment 1

[0048] The schematic diagram of the multi-segment linear nozzle along the thickness direction of the slide plate in this embodiment is shown in Figure 1-3 . As can be seen from the figure, the multi-segment linear nozzle along the thickness direction of the slide plate in this embodiment includes a plate-shaped part 1 formed with a first through hole and a tubular part 2 formed with a second through hole, and the first through hole and the second through hole constitute a casting channel 3; the plate-shaped part 1 has a first surface 13, a second surface 14, a first side surface 11, a second side surface 12, a third side surface 15 and a fourth side surface 17, the first surface 13 and the second surface 14 are two opposite surfaces and the second surface 14 is the surface adjacent to the tubular part 2; the first side surface 11 and the second side surface 12 are two opposite side surfaces, and the third side surface 15 and the fourth side surface 17 are two opposite side surfaces; the third side surface 15 and the fourth side surface 17 have a supporting sliding plane 16 and a clamping surface 18; the clamping surface 18 is distributed on both sides of the supporting sliding plane 16 along the thickness direction of the plate-shaped part 1;

[0049] The included angle α1 between the supporting sliding plane 16 and a first plane perpendicular to the casting channel 3 is 45°; the supporting sliding plane 16 faces the casting channel 3 or the adjacent area around the casting channel 3, and the clamping surface 18 also faces the casting channel 3 or the adjacent area around the casting channel 3; the clamping surface 18 is distributed on both sides of the supporting sliding plane 16 along the direction of surrounding the casting channel 3.

[0050] Assume that one of the planes that vertically bisects the support sliding plane 16 and intersects the casting channel 3 is the second plane, the clamping surface 18 on the third side surface 15 is mirror-symmetrical about the second plane, and the clamping surface 18 on the fourth side surface 17 is also mirror-symmetrical about the second plane; one of the planes that is parallel to the casting channel 3, intersects the first side surface 11, and bisects the plate-shaped portion 1 is the third plane, and the fourth side surface 17 and the third side surface 15 are mirror-symmetrical about the third plane.

[0051] In this embodiment, the clamping surface 18 is composed of two planar clamping surfaces, and the two planar clamping surfaces are symmetrically distributed on both sides of the support sliding plane 16 along the thickness direction of the plate-shaped portion 1 (along the direction of surrounding the casting channel 3 [i.e., in the circumferential direction of the plate-shaped portion 1], both the clamping surface 18 and the support sliding plane 16 are a pure plane); the first planar clamping surface adjacent to the first surface 13 and the second planar clamping surface adjacent to the second surface 14, and the included angles β4 between the first planar clamping surface and the second planar clamping surface and the support sliding plane are both 150 - 179°, and the included angle α2 between the clamping surface 18 extending along the thickness direction of the plate-shaped portion 1 and the first plane perpendicular to the casting channel 3 is greater than 0 and less than 90° (see Figure 4 ); in this embodiment, the included angle α21 between the first planar clamping surface and the first plane perpendicular to the casting channel 3 is 50°, and the included angle α22 between the second planar clamping surface and the first plane perpendicular to the casting channel 3 is 40° (see Figure 5 ); the length L1 of the first planar clamping surface along the thickness direction of the plate-shaped portion 1 is 7 mm, and the length L3 of the second planar clamping surface along the thickness direction of the plate-shaped portion 1 is 8 mm; the length L2 of the support sliding plane 16 along the thickness direction of the plate-shaped portion 1 is 8 mm (see Figure 5 ).

[0052] In this embodiment, the first side surface 11 and the second side surface 12 are two planes parallel to the casting channel 3, and the third side surface 15 and the fourth side surface 17 further have a transition surface 19 [see Figure 11】, the transition surface 19 is parallel to the casting channel 3; the transition surface 19 is adjacent to the first surface 13, and both the supporting sliding plane 16 and the clamping surface 18 are adjacent to the second surface 14; the first surface 13 and the second surface 14 are two parallel planes. The plate-like part 1 and the tubular part 2 are integrally formed, and the outer surfaces of the upper ends of the plate-like part 1 and the tubular part 2 are covered with a metal shell 4, and the metal shell 4 is an iron shell with a thickness of 3 mm [in other embodiments, it can also be a steel shell]; the outer surface of the lower end of the tubular part 2 is covered with a fiber cotton 5, and the thickness of the fiber cotton 5 is 3 mm.

[0053] In this embodiment, the length of the first surface 13 in the direction from the first side surface 11 to the second side surface 12 is 210 mm; the length of the first surface 13 in the direction of the third side surface 15 and the fourth side surface 17 is 200 mm; the length of the second surface 14 in the direction from the first side surface 11 to the second side surface 12 is 210 mm; the length of the second surface 14 in the direction of the third side surface 15 and the fourth side surface 17 is 170 mm; the distance between the first surface 13 and the second surface 14 is 39 mm; the inner diameter of the casting channel 3 is 82 mm; the height of the transition surface 19 is 24 mm; the outer diameter of the tubular part is 156 mm; the vertical distance from the lower end of the metal shell 4 to the first surface 13 is 215 mm; the width W0 of the supporting sliding plane 16 in the circumferential direction of the plate-like part 1 is 64 mm, and the widths W1 of the two planar clamping surfaces in the circumferential direction of the plate-like part 1 are both 64 mm.

[0054] Through stress-strain simulation tests (modeling CAD digital objects and CAE digital objects, and then analyzing temperature data and stress-strain data, see Figure 12 ), the stress-strain of the multi-segment line-type nozzle along the thickness direction of the slide plate in this embodiment is analyzed. The results show that: compared with the existing nozzle, the maximum equivalent principal strain of the metal shell in this embodiment is reduced, and the maximum principal stress at the nozzle neck, the maximum principal stress of the plate-like part, and the maximum principal stress of the inner wall of the casting channel are all reduced. The steel plant tests also further confirm that the multi-segment line-type nozzle along the thickness direction of the slide plate in this embodiment has an improved service life compared with the currently in-service nozzles.

[0055] In some other embodiments, for the clamping surface 18 extending along the thickness direction of the plate-like part 1: the clamping surface 18 can also be a curved surface; the curved surface is a folded surface or an arc surface that bends along the circumferential direction around the casting channel and / or bends along the thickness direction.

[0056] Embodiment 2

[0057] As Figure 6 and Figure 7As shown, the difference between this embodiment and Embodiment 1 is only that: there is one planar clamping surface along the thickness direction of the supporting sliding plane 16 on the plate-like part 1 (along the direction around the casting channel 3 [i.e., circumferentially on the plate-like part 1], both the clamping surface 18 and the supporting sliding plane 16 are a pure plane), and this planar clamping surface is adjacent to the first surface 13 (in some other embodiments, this planar clamping surface can also be adjacent to the second surface 14); the angle β4 between the planar clamping surface and the supporting sliding plane is 150 - 179°, and the angle α2 between the clamping surface 18 extending along the thickness direction of the plate-like part 1 and the first plane perpendicular to the casting channel 3 is greater than 0 and less than 90°. In this embodiment, the angle α2 between the planar clamping surface and the first plane perpendicular to the casting channel 3 is 48° (see Figure 6 ); the length L1 of the planar clamping surface along the thickness direction of the plate-like part 1 is 12 mm, and the length L2 of the supporting sliding plane 16 along the thickness direction of the plate-like part 1 is 12 mm (see Figure 7 ).

[0058] Through stress-strain simulation tests (modeling CAD digital objects and CAE digital objects, and then analyzing temperature data and stress-strain data, see Figure 12 ), the stress-strain of the multi-segment nozzle along the thickness direction of the slide plate in this embodiment is analyzed. The results show that: compared with the existing nozzle, although the maximum equivalent principal strain of its metal shell is reduced, and the maximum principal stress at the nozzle neck, the maximum principal stress of the plate-like part, and the maximum principal stress of the inner wall of the casting channel can all be reduced, the reduction amplitude is smaller than that of Embodiment 1. It is further confirmed in the steel plant test that the multi-segment nozzle along the thickness direction of the slide plate in this embodiment has also improved the service life compared with the currently in-service nozzle.

[0059] In some other embodiments, for the clamping surface 18 extending along the thickness direction of the plate-like part 1: the clamping surface 18 can also be a curved surface; the curved surface is a folded surface or an arc surface that bends along the direction around the casting channel and / or bends along the thickness direction.

[0060] Embodiment 3

[0061] As Figure 8As shown, the difference between this embodiment and Embodiment 1 is only that: on both sides of the supporting sliding plane 16, the clamping surfaces 18 are also distributed along the direction of surrounding the casting channel 3; the clamping surfaces 18 are two planar clamping surfaces, and the two planar clamping surfaces are symmetrically distributed on both sides of the supporting sliding plane 16 along the circumferential direction of the plate-like part 1, and the included angle between the clamping surface 18 and the first plane perpendicular to the casting channel 3 is equal to 45°; the included angle β1 between the planar clamping surface and the supporting sliding plane 16 is 120-175°. The width W0 of the supporting sliding plane 16 along the circumferential direction of the plate-like part 1 is 64 mm, and the widths W1 of the two planar clamping surfaces along the circumferential direction of the plate-like part 1 are both 64 mm.

[0062] Through stress-strain simulation tests (CAD digital object and CAE digital object modeling, and then temperature data and stress-strain data analysis, see Figure 12 ), the stress-strain of the multi-segment nozzle along the thickness direction of the slide plate in this embodiment is analyzed. The results show that: compared with Embodiment 1, for the multi-segment nozzle along the thickness direction of the slide plate in this embodiment, the maximum equivalent principal strain of the metal shell is further reduced, and the maximum principal stress at the nozzle neck, the maximum principal stress of the plate-like part, and the maximum principal stress of the inner wall of the casting channel can all be further reduced. In the steel plant test, it is also further confirmed that the multi-segment nozzle along the thickness direction of the slide plate in this embodiment has a further improved service life compared with the currently in-service nozzle.

[0063] In some other embodiments, for the clamping surface 18 extending along the thickness direction of the plate-like part 1: the clamping surface 18 can also be a curved surface; the curved surface is a folded surface or an arc surface that bends along the direction of surrounding the casting channel and / or bends along the thickness direction; or, for the clamping surface 18 extending along the direction of surrounding the casting channel 3: the clamping surface 18 can also be a curved surface, and the curved surface is a folded surface or an arc surface that bends along the direction of surrounding the casting channel and / or bends along the thickness direction.

[0064] Embodiment 4

[0065] As Figure 9As shown, the difference between this embodiment and Embodiment 1 is only that: on both sides of the supporting sliding plane 16, the clamping surfaces 18 are also distributed along the direction of surrounding the casting channel 3; the clamping surfaces 18 are four planar clamping surfaces and are symmetrically distributed on both sides of the supporting sliding plane 16; the four planar clamping surfaces are respectively the first planar clamping surface, the second planar clamping surface, the third planar clamping surface and the fourth planar clamping surface; the first planar clamping surface and the second planar clamping surface are adjacent to the supporting sliding plane 16 and are symmetrically distributed on both sides of the supporting sliding plane 16; the third planar clamping surface is adjacent to the first side surface 11, the fourth planar clamping surface is adjacent to the second side surface 12, and the third planar clamping surface and the fourth planar clamping surface are symmetrically distributed with respect to the supporting sliding plane 16; the width W0 of the supporting sliding plane 16 along the circumferential direction of the plate-like portion 1 is 40 mm, and the widths W1 of the first planar clamping surface and the second planar clamping surface along the circumferential direction of the plate-like portion 1 are both 50 mm; the widths W2 of the third planar clamping surface and the fourth planar clamping surface along the circumferential direction of the plate-like portion 1 are both 34 mm; the included angle γ1 between two adjacent planar clamping surfaces is 150 - 179°, and the included angle β2 between the planar clamping surface and the supporting sliding plane 16 is 150 - 179°.

[0066] Through stress-strain simulation tests (CAD digital object and CAE digital object modeling, and then temperature data and stress-strain data analysis, see Figure 12 ), the stress-strain of the multi-segment nozzle along the thickness direction of the slide plate in this embodiment is analyzed. The results show that: compared with Embodiment 1, for the multi-segment nozzle along the thickness direction of the slide plate in this embodiment, the maximum equivalent principal strain of its metal shell is further reduced, and the maximum principal stress at the nozzle neck, the maximum principal stress of the plate-like portion, and the maximum principal stress of the inner wall of the casting channel can all be further reduced. It is also further confirmed in the steel plant test that the multi-segment nozzle along the thickness direction of the slide plate in this embodiment has a further improved service life compared with the currently in-service nozzles.

[0067] In some other embodiments, for the clamping surface 18 extending along the thickness direction of the plate-like portion 1: the clamping surface 18 can also be a curved surface; the curved surface is a folded surface or an arc surface that bends along the direction of surrounding the casting channel and / or bends along the thickness direction; or, for the clamping surface 18 extending along the direction of surrounding the casting channel 3: the clamping surface 18 can also be a curved surface, and the curved surface is a folded surface or an arc surface that bends along the direction of surrounding the casting channel and / or bends along the thickness direction.

[0068] Embodiment 5

[0069] As Figure 10As shown, the difference between this embodiment and Embodiment 1 is only that: the clamping surfaces 18 are also distributed on both sides of the supporting sliding plane 16 along the direction of surrounding the casting channel 3; the clamping surfaces 18 are six planar clamping surfaces and are symmetrically distributed on both sides of the supporting sliding plane 16; the six planar clamping surfaces are respectively the first planar clamping surface, the second planar clamping surface, the third planar clamping surface, the fourth planar clamping surface, the fifth planar clamping surface and the sixth planar clamping surface; the first planar clamping surface and the second planar clamping surface are adjacent to the supporting sliding plane 16 and are symmetrically distributed on both sides of the supporting sliding plane 16; the fifth planar clamping surface is adjacent to the first side surface 11, the sixth planar clamping surface is adjacent to the second side surface 12, and the fifth planar clamping surface and the sixth planar clamping surface are symmetrically distributed with respect to the supporting sliding plane 16; the first planar clamping surface is transitioned to the fifth planar clamping surface through the third planar clamping surface; the second planar clamping surface is transitioned to the sixth planar clamping surface through the fourth planar clamping surface; the third planar clamping surface and the fourth planar clamping surface are symmetrically distributed with respect to the supporting sliding plane 16; the width W0 of the supporting sliding plane 16 in the circumferential direction of the plate-like portion 1 is 30 mm, and the widths W1 of the first planar clamping surface and the second planar clamping surface in the circumferential direction of the plate-like portion 1 are both 28 mm; the widths W2 of the third planar clamping surface and the fourth planar clamping surface in the circumferential direction of the plate-like portion 1 are both 28 mm; the widths W3 of the fifth planar clamping surface and the sixth planar clamping surface in the circumferential direction of the plate-like portion 1 are both 26 mm. The angle γ2 between two adjacent planar clamping surfaces is 150 - 179°, and the angle β3 between the planar clamping surface and the supporting sliding plane 16 is 150 - 179°.

[0070] Through stress-strain simulation tests (CAD digital object and CAE digital object modeling, and then temperature data and stress-strain data analysis, see Figure 12 ), the stress-strain of the multi-segment line-type nozzle along the thickness direction of the slide plate in this embodiment is analyzed. The results show that: compared with Embodiment 1, for the multi-segment line-type nozzle along the thickness direction of the slide plate in this embodiment, the maximum equivalent principal strain of its metal shell is further reduced, and the maximum principal stress at the nozzle neck, the maximum principal stress of the plate-like portion, and the maximum principal stress of the inner wall of the casting channel can all be further reduced. In the steel plant tests, it is also further confirmed that the multi-segment line-type nozzle along the thickness direction of the slide plate in this embodiment has a further improved service life compared with the currently in-service nozzles.

[0071] In some other embodiments, for the clamping surface 18 extending along the direction around the casting channel 3: the clamping surface 18 can also be a curved surface, and the curved surface is a folded surface or an arc surface that bends along the circumference of the casting channel and / or bends along the thickness direction; or, for the clamping surface 18 extending along the thickness direction of the plate-like portion 1: the clamping surface 18 can also be a curved surface, and the curved surface is a folded surface or an arc surface that bends along the circumference of the casting channel and / or bends along the thickness direction.

Claims

1. A multi-segment linear nozzle along the thickness direction of the slide plate, comprising a plate-shaped part (1) formed with a first through hole and a tubular part (2) formed with a second through hole, and the first through hole and the second through hole constitute a casting channel (3); The plate-shaped part (1) has a first surface (13), a second surface (14), a first side surface (11), a second side surface (12), a third side surface (15) and a fourth side surface (17), the first surface (13) and the second surface (14) are two opposite surfaces and the second surface (14) is the surface adjacent to the tubular part (2); the first side surface (11) and the second side surface (12) are two opposite side surfaces, and the third side surface (15) and the fourth side surface (17) are two opposite side surfaces; It is characterized in that The third side surface (15) and the fourth side surface (17) at least have: A supporting sliding plane (16) and a clamping surface (18), the included angle between the supporting sliding plane (16) and the clamping surface (18) is greater than 0°; the included angle α1 between the supporting sliding plane (16) and a first plane perpendicular to the casting channel (3) is greater than 0 and less than 90°; the supporting sliding plane (16) faces the casting channel (3) or the adjacent area around the casting channel (3), and the clamping surface (18) also faces the casting channel (3) or the adjacent area around the casting channel (3); The clamping surface (18) is distributed on one side or both sides of the supporting sliding plane (16) along the thickness direction of the plate-shaped part (1).

2. The multi-segment linear nozzle along the thickness direction of the slide plate according to claim 1, It is characterized in that The clamping surface (18) is one or an even number; when the clamping surface (18) is an even number: assuming that one of the planes perpendicular to and bisecting the supporting sliding plane (16) and intersecting the casting channel (3) is the second plane, the clamping surfaces (18) on the third side surface (15) are mirror-symmetrical about the second plane, and the clamping surfaces (18) on the fourth side surface (17) are also mirror-symmetrical about the second plane; one of the planes parallel to the casting channel (3), intersecting the first side surface (11) and bisecting the plate-shaped part (1) is the third plane, and the fourth side surface (17) and the third side surface (15) are mirror-symmetrical about the third plane.

3. The multi-segment linear nozzle along the thickness direction of the slide plate according to any one of claims 1-2, It is characterized in that The clamping surface (18) is a planar clamping surface or a curved clamping surface, and the included angle between the clamping surface (18) and a first plane perpendicular to the casting channel (3) is greater than 0 and less than 90°.

4. The multi-segment linear nozzle along the thickness direction of the slide plate according to claim 3, It is characterized in that When the clamping surface (18) is a curved clamping surface: the curved clamping surface is a folded surface or an arc surface bent along the circumference of the casting channel and / or bent along the thickness direction.

5. The multi-segment linear nozzle along the thickness direction of the slide plate according to any one of claims 1-2, It is characterized in that The included angle α21 between the first clamping surface (20) adjacent to the first surface (13) and the first plane perpendicular to the casting channel (3) is greater than the included angle α22 between the second clamping surface (21) adjacent to the second surface (14) and the first plane perpendicular to the casting channel (3).

6. The multi-segment linear nozzle along the thickness direction of the slide plate according to any one of claims 1-2, characterized in that when there are two planar clamping surfaces distributed along the thickness direction of the plate-like part (1) on both sides of the supporting sliding plane (16), the included angle β4 between the planar clamping surface and the supporting sliding plane (16) is 150-179°; The length L1 of the planar clamping surface adjacent to the first surface (13) along the thickness direction of the plate-like part (1) is 7 mm; the length L3 of the planar clamping surface adjacent to the second surface (14) along the thickness direction of the plate-like part (1) is 8 mm; the length L2 of the supporting sliding plane (16) along the thickness direction of the plate-like part (1) is 8 mm.

7. The multi-segment linear nozzle along the thickness direction of the slide plate according to any one of claims 1-2, characterized in that when there is one planar clamping surface along the thickness direction of the plate-like part (1) on one side of the supporting sliding plane (16), the included angle β4 between the planar clamping surface and the supporting sliding plane (16) is 150-179°; the length L1 of the planar clamping surface along the thickness direction of the plate-like part (1) is 12 mm; the length L2 of the supporting sliding plane (16) along the thickness direction of the plate-like part (1) is 12 mm.

8. The multi-segment linear nozzle along the thickness direction of the slide plate according to any one of claims 1-2, characterized in that the clamping surfaces (18) are also distributed on both sides of the supporting sliding plane (16) along the direction around the casting channel (3).

9. The multi-segment linear nozzle along the thickness direction of the slide plate according to claim 8, characterized in that the clamping surfaces (18) distributed on both sides of the supporting sliding plane (16) along the direction around the casting channel (3) are at least two, four or six.

10. The multi-segment linear nozzle along the thickness direction of the slide plate according to claim 9, characterized in that for the clamping surfaces (18) distributed on both sides of the supporting sliding plane (16) along the direction around the casting channel (3): when the clamping surfaces (18) are two planar clamping surfaces and are symmetrically distributed on both sides of the supporting sliding plane (16): the included angle β1 between the planar clamping surface and the supporting sliding plane (16) is 120-175°; when the clamping surfaces (18) are four planar clamping surfaces and are symmetrically distributed on both sides of the supporting sliding plane (16): the included angle γ1 between two adjacent planar clamping surfaces is 150-179°, and the included angle β2 between the planar clamping surface and the supporting sliding plane (16) is 150-179°; When the clamping surfaces (18) are six planar clamping surfaces and are symmetrically distributed on both sides of the supporting sliding plane (16): the included angle γ2 between two adjacent planar clamping surfaces is 150 - 179°, and the included angle β3 between the planar clamping surface and the supporting sliding plane (16) is 150 - 179°.

11. The multi-segment nozzle along the thickness direction of the slide plate according to claim 9, characterized in that for the clamping surfaces (18) distributed along the direction around the casting channel (3) on both sides of the supporting sliding plane (16): When the clamping surfaces (18) are two planar clamping surfaces and are symmetrically distributed on both sides of the supporting sliding plane (16): the width W0 of the supporting sliding plane (16) along the circumferential direction of the plate-shaped part (1) is 64 mm, and the widths W1 of the two planar clamping surfaces along the circumferential direction of the plate-shaped part (1) are both 64 mm; When the clamping surfaces (18) are four planar clamping surfaces and are symmetrically distributed on both sides of the supporting sliding plane (16): the four planar clamping surfaces are respectively the first planar clamping surface, the second planar clamping surface, the third planar clamping surface and the fourth planar clamping surface; the first planar clamping surface and the second planar clamping surface are adjacent to the supporting sliding plane (16) and are symmetrically distributed on both sides of the supporting sliding plane (16); the third planar clamping surface is adjacent to the first side surface (11), the fourth planar clamping surface is adjacent to the second side surface (12), and the third planar clamping surface and the fourth planar clamping surface are symmetrically distributed with respect to the supporting sliding plane (16); the width W0 of the supporting sliding plane (16) along the circumferential direction of the plate-shaped part (1) is 40 mm, the widths W1 of the first planar clamping surface and the second planar clamping surface along the circumferential direction of the plate-shaped part (1) are both 50 mm; the widths W2 of the third planar clamping surface and the fourth planar clamping surface along the circumferential direction of the plate-shaped part (1) are both 34 mm; When the clamping surfaces (18) are six planar clamping surfaces and are symmetrically distributed on both sides of the supporting sliding plane (16): the six planar clamping surfaces are respectively a first planar clamping surface, a second planar clamping surface, a third planar clamping surface, a fourth planar clamping surface, a fifth planar clamping surface, and a sixth planar clamping surface; the first planar clamping surface and the second planar clamping surface are adjacent to the supporting sliding plane (16) and are symmetrically distributed on both sides of the supporting sliding plane (16); the fifth planar clamping surface is adjacent to the first side surface (11), the sixth planar clamping surface is adjacent to the second side surface (12), and the fifth planar clamping surface and the sixth planar clamping surface are symmetrically distributed with respect to the supporting sliding plane (16); the first planar clamping surface is transitioned to the fifth planar clamping surface through the third planar clamping surface; the second planar clamping surface is transitioned to the sixth planar clamping surface through the fourth planar clamping surface; the third planar clamping surface and the fourth planar clamping surface are symmetrically distributed with respect to the supporting sliding plane (16); the width W0 of the supporting sliding plane (16) in the circumferential direction of the plate-shaped portion (1) is 30 mm, and the widths W1 of the first planar clamping surface and the second planar clamping surface in the circumferential direction of the plate-shaped portion (1) are both 28 mm; the widths W2 of the third planar clamping surface and the fourth planar clamping surface in the circumferential direction of the plate-shaped portion (1) are both 28 mm; the widths W3 of the fifth planar clamping surface and the sixth planar clamping surface in the circumferential direction of the plate-shaped portion (1) are both 26 mm.

12. The multi-segment line type nozzle along the thickness direction of the slide plate according to claim 11, wherein, the length of the first surface (13) in the direction from the first side surface (11) to the second side surface (12) is 205 - 215 mm; the length of the first surface (13) in the direction of the third side surface (15) and the fourth side surface (17) is 195 - 205 mm; the length of the second surface (14) in the direction from the first side surface (11) to the second side surface (12) is 205 - 215 mm; the length of the second surface (14) in the direction of the third side surface (15) and the fourth side surface (17) is 160 - 170 mm; the distance between the first surface (13) and the second surface (14) is 38 - 42 mm; the inner diameter of the casting channel (3) is 80 - 84 mm.

13. The multi-segment line type nozzle along the thickness direction of the slide plate according to claim 8, wherein, The first side surface (11) and the second side surface (12) are two planes parallel to the casting channel (3). The third side surface (15) and the fourth side surface (17) have at least one transition surface (19) which is parallel to the casting channel (3). The transition surface (19) is adjacent to the first surface (13), and both the supporting sliding plane (16) and the clamping surface (18) are adjacent to the second surface (14). The first surface (13) and the second surface (14) are two parallel planes. The first surface (13) and the second surface (14) are respectively perpendicular to the first side surface (11) and the second side surface (12).

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