A buffer device for pouring nozzles for steel section casting

Abstract

This invention discloses a buffer device for a pouring nozzle used in steel section casting, relating to the field of steel section technology. It includes a docking device. This invention, through the docking device and using a guide plate, can quickly push the injection nozzle directly above the pouring nozzle. As the injection nozzle moves downward, the elastic deformation of the third spring, the upper buffer plate, and the buffer pad reduces the impact force during the nozzle's descent, preventing excessive downward movement and avoiding collisions between the injection nozzle and the pouring nozzle. The clamping plates continuously move closer to the injection nozzle as it moves downward, tightly clamping the nozzle between the four clamping plates for stability and to prevent slippage. By incorporating a downward-moving tensioning member, the first spring can reduce the speed of the injection nozzle's downward movement, preventing excessive speed and collisions. Furthermore, by maintaining a constant total length of the traction cable, the front traction cable can continuously bring the clamping member closer to the injection nozzle. This invention features strong practicality, ease of docking, and high stability.

Description

Technical Field

[0001] This invention relates to the field of structural steel technology, specifically to a pouring nozzle buffer device for structural steel casting. Background Technology

[0002] Section steel is a type of bar steel with a specific cross-sectional shape and size. It is one of the four major types of steel. Based on the cross-sectional shape, section steel is divided into simple section steel and complex section steel.

[0003] When casting small steel sections commonly found in the market, the injection nozzle slowly descends, with its opening directly aligned with the pouring nozzle. This prevents the molten steel from leaking out from the top of the pouring nozzle. However, the contact between the injection nozzle and the pouring nozzle can cause some sliding and collisions, which can damage the pouring nozzle, affecting its service life, and also cause misalignment between the injection nozzle and the pouring nozzle, thus affecting normal casting operations.

[0004] Therefore, it is necessary to design a pouring nozzle buffer device for steel casting that is practical, easy to connect, and highly stable. Summary of the Invention

[0005] The purpose of this invention is to provide a buffer device for a pouring nozzle used in steel section casting, so as to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a pouring nozzle buffer device for casting steel profiles, including an injection nozzle, a pouring nozzle is provided directly below the injection nozzle, a heat insulation cylinder is connected to the bottom of the pouring nozzle, a steel ingot mold is connected to the bottom of the heat insulation cylinder, a base is fixedly connected to the bottom of the steel ingot mold, pouring channels are provided through the upper and lower ends of the pouring nozzle, an opening is provided at the bottom of the injection nozzle, a circular groove is provided through the top of the pouring nozzle, a circular groove is provided at the upper part of the heat insulation cylinder, two circular grooves are connected, and a docking device is provided directly above the base;

[0007] The docking device includes a guiding mechanism, the bottom of which is fixedly connected to the top of the base, a fixing mechanism fixedly connected to the top of the pouring nozzle, and a buffer limiting mechanism fixedly connected to the top of the pouring nozzle.

[0008] According to the above technical solution, the guiding mechanism includes a support plate, the bottom of the support plate is fixedly connected to the top of the base, a connecting block is fixedly connected to the top of the support plate, and a guide plate is fixedly connected to the right side of the connecting block.

[0009] According to the above technical solution, the fixing mechanism includes a downward stretching member and a clamping member. The bottom of the downward stretching member is fixedly connected to the bottom of the circular groove, and the lower part of the downward stretching member is disposed in the circular groove. A support block is fixedly connected to the bottom of the clamping member, and the bottom of the support block is fixedly connected to the top of the pouring nozzle.

[0010] According to the above technical solution, the downward stretching member includes a top block. The side of the top block closest to the axis of the injection nozzle is fixedly connected to the side of the injection nozzle. There are two top blocks, which are equidistantly distributed along the circumference of the injection nozzle. The bottom of the top block has an insertion hole, into which a shift rod is inserted. The bottom of the shift rod is fixedly connected to a first slider. The bottom of the first slider is fixedly connected to a first spring. The bottom end of the first spring is fixedly connected to the bottom of the circular groove. The top of the pouring nozzle is fixedly connected to a limit cylinder. The first slider is slidably connected to the circular groove. The side of the first slider is fixedly connected to a traction cable. The traction cable is slidably connected to a fixed pulley. The bottom of the fixed pulley is fixedly connected to the top of the pouring nozzle. The end of the traction cable away from the shift rod is fixedly connected to a large circular plate. The side of the large circular plate is fixedly connected to a small circular plate. The side of the small circular plate is fixedly connected to a third slider. A connecting arc plate is provided on the outer side of the large circular plate. The two ends of the connecting arc plate are fixedly connected to the sides of the small circular plate and the large circular plate, respectively.

[0011] According to the above technical solution, the clamping component includes a clamping plate, a first connecting rod is fixedly connected to the side of the clamping plate away from the moving rod, a second slider is fixedly connected to the end of the first connecting rod away from the clamping plate, a second spring is fixedly connected to the side of the second slider away from the clamping plate, the end of the second spring away from the clamping plate is fixedly connected to the center of the small circular plate, a slide cylinder is slidably connected to the second slider, a guide rail is fixedly connected to the top of the support block, a slide groove is provided on one side of the guide rail, and the slide groove is slidably connected to the third slider.

[0012] According to the above technical solution, the buffer limiting mechanism includes an upper arc plate, the side of the upper arc plate near the axis of the injection nozzle is fixedly connected to the side of the injection nozzle, a lower arc plate is provided directly below the upper arc plate, a third spring is fixedly connected to the bottom of the lower arc plate, a support column is fixedly connected to the bottom of the third spring, the bottom of the support column is fixedly connected to the top of the injection nozzle, a groove is opened at the bottom of the support column, a buffer pad is slidably connected to the groove, a second connecting rod is fixedly connected to the top of the buffer pad, a buffer upper plate is fixedly connected to the bottom of the second connecting rod, a retaining ring is fixedly connected to the top of the support column, the inner diameter of the retaining ring is larger than the diameter of the second connecting rod and smaller than the diameter of the buffer pad, and a semi-circular baffle is fixedly connected to the side of the lower part of the injection nozzle.

[0013] According to the above technical solution, there are two fixing mechanisms and two buffer limiting mechanisms. The two fixing mechanisms and the two buffer limiting mechanisms are equidistantly distributed in the circumferential direction of the injection nozzle, and one buffer limiting mechanism is set between the two fixing mechanisms.

[0014] According to the above technical solution, the guide plate is composed of two arc-shaped plates. The distance between the two arc-shaped plates gradually decreases from right to left. The two arc-shaped plates at the leftmost end form a semi-cylinder, and the inner diameter of the semi-cylinder is the same as the outer diameter of the injection nozzle.

[0015] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0016] (1) In this invention, by setting up a docking device and using a guide plate, the injection nozzle can be pushed to the top of the pouring nozzle in a simple and quick manner. The injection nozzle moves down and the elastic deformation of the third spring, the buffer plate and the buffer pad is used to reduce the impact force when the injection nozzle descends, prevent the injection nozzle from moving down too much, and avoid collision between the injection nozzle and the pouring nozzle. The clamping plate moves closer to the injection nozzle as the injection nozzle moves down, and the injection nozzle is tightly clamped between the four clamping plates to maintain stability and prevent slippage.

[0017] (2) In this invention, by providing a downward stretching member, the speed of the injection nozzle when it moves downward can be reduced by the first spring to prevent collisions caused by excessive speed. Furthermore, by keeping the total length of the traction cable constant, the front traction cable can drive the clamping member to continuously approach the injection nozzle.

[0018] (3) In this invention, by setting a clamping member, the lower the injection nozzle is, the tighter the clamping plate clamps the side of the injection nozzle. Finally, the injection nozzle is tightly clamped between the four clamping plates, which can prevent the injection nozzle from tilting and sliding relative to each other during the pouring process, improve the quality of pouring, avoid gaps between the injection nozzle and the pouring nozzle, prevent molten steel from surging up, damage the pouring nozzle, and extend the service life of the pouring nozzle.

[0019] (4) In this invention, by setting a buffer limiting mechanism, the elastic deformation of the third spring, the buffer plate and the buffer pad is used to reduce the impact force when the injection nozzle descends. With the support of the support column, the injection nozzle cannot continue to move down. The mouth of the injection nozzle is exactly connected to the top of the pouring nozzle. With the support of the support column and the buffer pad, the injection nozzle can be prevented from moving down too much, and the injection nozzle and the pouring nozzle can be avoided from colliding. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0021] Figure 1 This is a schematic diagram of the overall front cross-sectional structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the docking device of the present invention;

[0023] Figure 3 yes Figure 2 A partial structural diagram of the lower section;

[0024] Figure 4 This is a schematic diagram of the fixing mechanism of the present invention;

[0025] Figure 5 This is an exploded view of the fixing mechanism of the present invention;

[0026] Figure 6 This is an exploded view of the downward stretching member of the present invention;

[0027] Figure 7 This is an exploded view of the clamping component of the present invention;

[0028] Figure 8 This is a schematic diagram of the buffer limiting mechanism of the present invention.

[0029] In the diagram: 1. Injection nozzle, 2. Casting nozzle, 3. Insulation cylinder, 4. Ingot mold, 5. Base, 6. Casting channel, 7. Connecting device, 71. Guide mechanism, 711. Support plate, 712. Connecting block, 713. Guide plate, 72. Fixing mechanism, 721. Lowering tensioning component, 7211. Top block, 7212. Moving rod, 7213. First slider, 7214. First spring, 7215. Limiting cylinder, 7216. Traction cable, 7217. Fixed pulley, 7218. Large circular plate, 7219. Small circular plate, 722. Clamping component, 7221. Clamping plate 7222. First connecting rod; 7223. Second slider; 7224. Second spring; 7225. Guide rail; 7226. Slide groove; 7227. Slide cylinder; 73. Buffer limiting mechanism; 731. Upper arc plate; 732. Lower arc plate; 733. Third spring; 734. Buffer upper plate; 735. Second connecting rod; 736. Buffer pad; 737. Semicircular baffle; 738. Retaining ring; 739. Groove; 8. Nozzle; 9. Circular groove; 10. Rectangular hole; 11. Third slider; 12. Connecting arc plate; 13. Support column; 14. Insertion hole; 15. Support block. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figure 1-8The present invention provides a technical solution: a pouring nozzle buffer device for casting steel profiles, including an injection nozzle 1, a pouring nozzle 2 disposed directly below the injection nozzle 1, a heat insulation cylinder 3 connected to the bottom of the pouring nozzle 2, a steel ingot mold 4 connected to the bottom of the heat insulation cylinder 3, a base 5 fixedly connected to the bottom of the steel ingot mold 4, a pouring channel 6 extending through the upper and lower ends of the pouring nozzle 2, an opening 8 at the bottom of the injection nozzle 1, a circular groove 9 extending through the top of the pouring nozzle 2, a circular groove 9 at the upper part of the heat insulation cylinder 3, the two circular grooves 9 being connected, and a docking device 7 disposed directly above the base 5;

[0032] The docking device 7 includes a guide mechanism 71, the bottom of which is fixedly connected to the top of the base 5. A fixing mechanism 72 is fixedly connected to the top of the pouring nozzle 2, and a buffer limiting mechanism 73 is fixedly connected to the top of the pouring nozzle 2. There are two fixing mechanisms 72 and two buffer limiting mechanisms 73. The two fixing mechanisms 72 and the two buffer limiting mechanisms 73 are equidistantly distributed in the circumferential direction of the injection nozzle 1. One buffer limiting mechanism 73 is set between the two fixing mechanisms 72.

[0033] The guide mechanism 71 includes a support plate 711, the bottom of which is fixedly connected to the top of the base 5. A connecting block 712 is fixedly connected to the top of the support plate 711. A guide plate 713 is fixedly connected to the right side of the connecting block 712. The guide plate 713 is composed of two arc-shaped plates. The distance between the two arc-shaped plates gradually decreases from right to left. The two arc-shaped plates at the leftmost end form a semi-cylinder. The inner diameter of the semi-cylinder is the same as the outer diameter of the injection nozzle 1.

[0034] The fixing mechanism 72 includes a downward stretching member 721 and a clamping member 722. The bottom of the downward stretching member 721 is fixedly connected to the bottom of the circular groove 9. The lower part of the downward stretching member 721 is disposed in the circular groove 9. The bottom of the clamping member 722 is fixedly connected to a support block 15. The bottom of the support block 15 is fixedly connected to the top of the pouring nozzle 2.

[0035] The downward stretching member 721 includes a top block 7211. The side of the top block 7211 closest to the axis of the injection nozzle 1 is fixedly connected to the side of the injection nozzle 1. There are two top blocks 7211, which are equidistantly distributed along the circumference of the injection nozzle 1. The bottom of the top block 7211 has an insertion hole 14, into which a shift rod 7212 is inserted. The bottom of the shift rod 7212 is fixedly connected to a first slider 7213, and the bottom of the first slider 7213 is fixedly connected to a first spring 7214. The bottom end of the first spring 7214 is fixedly connected to the bottom of the circular groove 9. The top of the pouring nozzle 2 is fixedly connected to a limiting cylinder 7215, and a rectangular hole is provided on the side of the limiting cylinder 7215. 10. The first slider 7213 is slidably connected to the circular groove 9. A traction cable 7216 is fixedly connected to the side of the first slider 7213. A fixed pulley 7217 is slidably connected to the traction cable 7216. The bottom of the fixed pulley 7217 is fixedly connected to the top of the pouring nozzle 2. A large circular plate 7218 is fixedly connected to the end of the traction cable 7216 away from the moving rod 7212. A small circular plate 7219 is fixedly connected to the side of the large circular plate 7218. A third slider 11 is fixedly connected to the side of the small circular plate 7219. A connecting arc plate 12 is provided on the outer side of the large circular plate 7218. The two ends of the connecting arc plate 12 are fixedly connected to the sides of the small circular plate 7219 and the large circular plate 7218, respectively.

[0036] The clamping member 722 includes a clamping plate 7221. A first connecting rod 7222 is fixedly connected to the side of the clamping plate 7221 away from the moving rod 7212. A second slider 7223 is fixedly connected to the end of the first connecting rod 7222 away from the clamping plate 7221. A second spring 7224 is fixedly connected to the side of the second slider 7223 away from the clamping plate 7221. The end of the second spring 7224 away from the clamping plate 7221 is fixedly connected to the center of the small circular plate 7219. A slide cylinder 7227 is slidably connected to the second slider 7223. A guide rail 7225 is fixedly connected to the top of the support block 15. A slide groove 7226 is opened on one side of the guide rail 7225. The slide groove 7226 is slidably connected to the third slider 11.

[0037] The buffer limiting mechanism 73 includes an upper arc plate 731, which is fixedly connected to the side of the injection nozzle 1 near the axis of the injection nozzle 1. A lower arc plate 732 is provided directly below the upper arc plate 731. A third spring 733 is fixedly connected to the bottom of the lower arc plate 732. A support column 13 is fixedly connected to the bottom of the third spring 733. The bottom of the support column 13 is fixedly connected to the top of the pouring nozzle 2. A groove 739 is opened at the bottom of the support column 13. A buffer pad 736 is slidably connected to the groove 739. A second connecting rod 735 is fixedly connected to the top of the buffer pad 736. A buffer upper plate 734 is fixedly connected to the bottom of the second connecting rod 735. A retaining ring 738 is fixedly connected to the top of the support column 13. The inner diameter of the retaining ring 738 is larger than the diameter of the second connecting rod 735 and smaller than the diameter of the buffer pad 736. A semi-circular baffle 737 is fixedly connected to the side of the lower part of the injection nozzle 1.

[0038] In use, the top block on the injection nozzle 1 is aligned with the guide plate 713. The injection nozzle 1 is pushed into the guide plate 713 and moved to the left. The guide plate 713 is composed of two arc-shaped plates. The distance between the two arc-shaped plates gradually decreases from right to left. The two arc-shaped plates at the leftmost end form a semi-cylinder. The inner diameter of the semi-cylinder is the same as the outer diameter of the injection nozzle 1. During the leftward movement, the injection nozzle 1 approaches and is close to the inner wall of the guide plate 713. The injection nozzle 1 slides along the inner wall of the guide plate 713 into the semi-cylinder. The injection nozzle 1 fits into the semi-cylinder. At this time, the nozzle 8 at the bottom of the injection nozzle 1 is aligned with the pouring channel 6. Through the guide mechanism 71, the injection nozzle 1 can be pushed to the appropriate position easily and quickly, which facilitates the docking of the injection nozzle 1 and the pouring nozzle.

[0039] The injection nozzle 1, along with the upper arc plate 731, semi-circular baffle 737, and top block 7211, moves vertically downward along the wall of the semi-circular cylinder. The upper arc plate 731 contacts and presses the lower arc plate 732, which in turn presses the third spring 733. As the lower arc plate 732 continues to move downward, its bottom contacts the upper buffer plate 734. Simultaneously, the lower arc plate 732 presses the third spring 733, the upper buffer plate 734, and the buffer pad 736. The elastic deformation of the third spring 733, the upper buffer plate 734, and the buffer pad 736 reduces the impact force of the injection nozzle 1 as it descends. The bottom of the semi-circular baffle 737 contacts the top of the support column 13. At this point, the injection nozzle 1 cannot move further downward. The opening 8 of the injection nozzle 1 is aligned with the top of the pouring nozzle 2. Through the support of the support column 13 and the buffer pad 736, the injection nozzle 1 is prevented from moving downward too much, thus avoiding a collision between the injection nozzle 1 and the pouring nozzle 2.

[0040] As the injection nozzle 1 moves downward, the distance between the top block 7211 and the moving rod 7212 continuously decreases. The top of the moving rod 7212 penetrates into the insertion hole 14 and presses against the top block 7211. The moving rod 7212 and the first slider 7213 move downward along the axial direction of the circular groove 9. The first slider 7213 presses against the first spring 7214, compressing the first spring 7214. At the same time, the first slider 7213 also pulls the traction cable 7216. Since the total length of the traction cable 7216 is fixed, when the fixed pulley 7217 reaches the first... As the length of the traction cable 7216 between the sliders 7213 increases, the length of the traction cable 7216 between the fixed pulley 7217 and the large circular plate 7218 must decrease. The traction cable 7216 pulls the large circular plate 7218. Under the limiting action of the guide rail 7225, the third slider 11 slides the large circular plate 7218 to the right along the horizontal direction. By moving the lower tension member 721, the lower movement of the injection nozzle 1 sequentially drives the first slider 7213, the traction cable 7216, and the large circular plate 7218, so that the large circular plate 7218 continuously moves closer to the injection nozzle 1.

[0041] As the large circular plate 7218 moves, the small circular plate 7219 carries the second spring 7224, the second slider 7223, the first connecting rod 7222, and the clamping plate 7221 horizontally to the right. The clamping plate 7221 contacts and squeezes the side of the injection nozzle 1. As the injection nozzle 1 continues to descend, the clamping plate 7221 clamps the side of the injection nozzle 1 more tightly. When the injection nozzle and the pouring nozzle 2 are connected, the injection nozzle 1 is tightly clamped between the four clamping plates 7221. The injection nozzle 1 remains stable, preventing it from tilting or sliding relative to each other during the pouring process, thus improving the quality of the pouring, avoiding gaps between the injection nozzle 1 and the pouring nozzle 2, preventing molten steel from surging up and damaging the pouring nozzle 2, and extending the service life of the pouring nozzle 2.

[0042] After the pouring is completed, the injection nozzle 1 moves upward and away from the pouring nozzle 2, and all the compressed springs, along with their corresponding components, return to their original state.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0044] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A buffer device for a casting nozzle for profiled steel casting, comprising an injection nozzle (1), characterized in that: The bottom of the injection nozzle (1) is provided with a pouring nozzle (2), the bottom of the pouring nozzle (2) is communicated with a heat preservation cylinder (3), the bottom of the heat preservation cylinder (3) is communicated with a ingot mold (4), the bottom of the ingot mold (4) is fixedly connected with a base (5), the upper and lower ends of the pouring nozzle (2) are provided with pouring channels (6), the bottom of the injection nozzle (1) is provided with a nozzle (8), the pouring nozzle (2) is provided with a circular groove (9) penetrating from the top, the upper part of the heat preservation cylinder (3) is provided with a circular groove (9), the two circular grooves (9) are communicated, and the top of the base (5) is provided with a docking device (7); The docking device (7) comprises a guide mechanism (71), the bottom of the guide mechanism (71) is fixedly connected with the top of the base (5), the top of the pouring nozzle (2) is fixedly connected with a fixing mechanism (72), and the top of the pouring nozzle (2) is fixedly connected with a buffer limiting mechanism (73); The guide mechanism (71) comprises a supporting plate (711), the bottom of the supporting plate (711) is fixedly connected with the top of the base (5), the top of the supporting plate (711) is fixedly connected with a connecting block (712), and the right side of the connecting block (712) is fixedly connected with a guide plate (713); The fixing mechanism (72) comprises a downward stretching piece (721) and a clamping piece (722), the bottom of the downward stretching piece (721) is fixedly connected with the bottom of the circular groove (9), and the lower part of the downward stretching piece (721) is arranged in the circular groove (9); the bottom of the clamping piece (722) is fixedly connected with a supporting block (15), and the bottom of the supporting block (15) is fixedly connected with the top of the pouring nozzle (2); The buffer limiting mechanism (73) comprises an upper arc plate (731), one side of the upper arc plate (731) close to the axis of the injection nozzle (1) is fixedly connected with the side surface of the injection nozzle (1), a lower arc plate (732) is arranged below the upper arc plate (731), the bottom of the lower arc plate (732) is fixedly connected with a third spring (733), the bottom of the third spring (733) is fixedly connected with a supporting column (13), the bottom of the supporting column (13) is fixedly connected with the top of the pouring nozzle (2), the bottom of the supporting column (13) is provided with a groove (739), the groove (739) is slidably connected with a buffer pad (736), the top of the buffer pad (736) is fixedly connected with a second connecting rod (735), the bottom of the second connecting rod (735) is fixedly connected with a buffer upper plate (734), the top of the supporting column (13) is fixedly connected with a blocking ring (738), the inner diameter of the blocking ring (738) is greater than the diameter of the second connecting rod (735), the inner diameter of the blocking ring (738) is smaller than the diameter of the buffer pad (736), and the side surface of the lower part of the injection nozzle (1) is fixedly connected with a semicircular baffle (737). The guide plate (713) is composed of two arc-shaped plates, the distance between the two arc-shaped plates from right to left is gradually reduced, and the two arc-shaped plates at the leftmost end form a semicircular cylinder, and the inner diameter of the semicircular cylinder is the same as the outer diameter of the injection nozzle (1).

2. The buffer device for a casting nozzle for profile steel casting according to claim 1, characterized in that: The lower moving stretching piece (721) comprises a top block (7211), one side of the top block (7211) close to the axis of the injection nozzle (1) is fixedly connected with the side surface of the injection nozzle (1), the top block (7211) is two, the two top blocks (7211) are equidistantly distributed in the circumferential direction of the injection nozzle (1), the bottom of the top block (7211) is provided with an insertion hole (14), the insertion hole (14) is inserted with a moving rod (7212), the bottom of the moving rod (7212) is fixedly connected with a first sliding block (7213), the bottom of the first sliding block (7213) is fixedly connected with a first spring (7214), the bottom end of the first spring (7214) is fixedly connected with the bottom of the circular groove (9), the top of the pouring nozzle (2) is fixedly connected with a limiting cylinder (7215), the side surface of the limiting cylinder (7215) is provided with a rectangular hole (10), the first sliding block (7213) is slidably connected with the circular groove (9), the side surface of the first sliding block (7213) is fixedly connected with a traction cable (7216), the traction cable (7216) is slidably connected with a fixed pulley (7217), the bottom of the fixed pulley (7217) is fixedly connected with the top of the pouring nozzle (2), one end of the traction cable (7216) away from the moving rod (7212) is fixedly connected with a large circular plate (7218), the side surface of the large circular plate (7218) is fixedly connected with a small circular plate (7219), the side surface of the small circular plate (7219) is fixedly connected with a third sliding block (11), the outer side of the large circular plate (7218) is provided with a connecting arc plate (12), the two ends of the connecting arc plate (12) are fixedly connected with the side surfaces of the small circular plate (7219) and the large circular plate (7218) respectively.

3. A buffer device for a casting nozzle for profiled steel casting according to claim 2, characterized in that: The clamping piece (722) comprises a clamping plate (7221), one side of the clamping plate (7221) away from the moving rod (7212) is fixedly connected with a first connecting rod (7222), one end of the first connecting rod (7222) away from the clamping plate (7221) is fixedly connected with a second sliding block (7223), one side of the second sliding block (7223) away from the clamping plate (7221) is fixedly connected with a second spring (7224), one end of the second spring (7224) away from the clamping plate (7221) is fixedly connected with the center of the small circular plate (7219), the second sliding block (7223) is slidably connected with a sliding cylinder (7227), the top of the supporting block (15) is fixedly connected with a guide rail (7225), one side of the guide rail (7225) is provided with a sliding groove (7226), and the sliding groove (7226) is slidably connected with the third sliding block (11).

4. The buffering device for a casting nozzle for profile steel casting according to claim 1, characterized in that: The fixing mechanism (72) and the buffer limiting mechanism (73) are both two, the two fixing mechanisms (72) and the buffer limiting mechanisms (73) are equidistantly distributed according to the circumferential direction of the injection nozzle (1), and one buffer limiting mechanism (73) is arranged between the two fixing mechanisms (72).

Images