Continuous casting bale sliding nozzle switch air cooling hydraulic cylinder

Abstract

The utility model relates to a continuous casting bale sliding nozzle switch air-cooled hydraulic cylinder, and belongs to the technical field of continuous casting equipment in the metallurgical industry. According to the technical scheme, the hydraulic cylinder comprises a piston rod (1), a piston rod seal (2), a hydraulic cylinder body (3), a hydraulic cylinder exhaust hole (4), a hydraulic cylinder air cooling sleeve (5), a hydraulic cylinder piston seal (6), a hydraulic cylinder air inlet pipe (7) and a hydraulic cylinder piston (8), the hydraulic cylinder piston rod seal (2) is arranged in a cylinder head sealing groove of the hydraulic cylinder body (3), and the hydraulic cylinder piston seal (6) is arranged in a sealing groove of the hydraulic cylinder piston (8). The hydraulic cylinder air cooling sleeve (5) is welded to the hydraulic cylinder body (3), an air cooling cavity is formed between the hydraulic cylinder air cooling sleeve (5) and the hydraulic cylinder body (3), and the hydraulic cylinder air cooling sleeve (5) is provided with a hydraulic cylinder air inlet pipe (7) and a hydraulic cylinder exhaust hole (4). The hydraulic cylinder sealing device has the advantages that accelerated aging of the hydraulic cylinder sealing device in a high-temperature environment can be avoided, and the service life of a hydraulic cylinder is prolonged.

Description

Technical Field

[0001] The utility model relates to an air-cooled hydraulic cylinder for a sliding nozzle switch of a continuous casting ladle, belonging to the technical field of continuous casting equipment in the metallurgical industry. Background Art

[0002] At present, the well-known hydraulic cylinders for opening and closing the sliding nozzle of the continuous casting ladle use ordinary hydraulic cylinders. On the one hand, the hydraulic cylinder piston rod is made of ordinary material, and the hydraulic cylinder piston rod leaks oil due to wear and collision. The piston rod is not hard enough and often breaks, causing the sliding nozzle of the continuous casting ladle to be unable to open and close normally, which can easily lead to major production safety accidents. On the other hand, the ambient temperature around the hydraulic cylinder exceeds 200 degrees during production, and the hydraulic cylinder seal ages faster in a high temperature environment. To ensure normal production, each production unit adopts the method of regularly replacing the hydraulic cylinder, and the replacement cycle is generally about one month. However, even regular replacement of the hydraulic cylinder cannot completely guarantee that the hydraulic cylinder seal will not be burned out. Once the hydraulic cylinder seal is burned out in a high temperature environment, resulting in internal leakage of the hydraulic cylinder, the hydraulic cylinder will be unable to control the opening and closing of the sliding nozzle of the continuous casting ladle. At the least, it will cause the continuous casting production to stop due to heat. At worst, it will cause molten steel to overflow, resulting in casualties and equipment burns, which are major safety accidents. In addition, frequent replacement of hydraulic cylinders increases the labor of maintenance personnel and equipment costs. Utility Model Content

[0003] The purpose of the utility model is to provide an air-cooled hydraulic cylinder for sliding water nozzle switch of a continuous casting ladle, which can prevent the hydraulic cylinder seal from aging faster in a high temperature environment, extend the service life of the hydraulic cylinder, and solve the problems existing in the background technology.

[0004] The technical solution of the utility model is:

[0005] A continuous casting ladle sliding water nozzle switch air-cooled hydraulic cylinder, comprising a piston rod, a piston rod seal, a hydraulic cylinder body, a hydraulic cylinder exhaust hole, a hydraulic cylinder air-cooling jacket, a hydraulic cylinder piston seal, a hydraulic cylinder air inlet pipe and a hydraulic cylinder piston. The hydraulic cylinder piston rod seal is arranged in a cylinder head sealing groove of the hydraulic cylinder body, the piston seal is arranged in a sealing groove of the hydraulic cylinder piston, the hydraulic cylinder air-cooling jacket is welded to the hydraulic cylinder body, an air-cooling chamber is formed between the hydraulic cylinder air-cooling jacket and the hydraulic cylinder body, and the hydraulic cylinder air-cooling jacket is provided with a hydraulic cylinder air inlet pipe and a hydraulic cylinder exhaust hole connected to the air-cooling chamber.

[0006] A hydraulic cylinder air inlet pipe on the hydraulic cylinder air cooling jacket, which is in communication with the air cooling chamber, is welded to the hydraulic cylinder air cooling jacket.

[0007] The hydraulic cylinder exhaust holes on the hydraulic cylinder air cooling jacket that are in communication with the air cooling chamber are a plurality of small holes that are evenly arranged in the circumferential direction of the hydraulic cylinder air cooling jacket.

[0008] The hydraulic cylinder exhaust holes on the hydraulic cylinder air cooling jacket that are connected to the air cooling chamber are six φ6mm small holes evenly arranged in the circumferential direction of the hydraulic cylinder air cooling jacket.

[0009] The beneficial effects of the utility model are: it can prevent the hydraulic cylinder seal from aging faster in a high temperature environment and extend the service life of the hydraulic cylinder, thereby effectively solving the problems of hydraulic cylinder piston rod breakage and internal and external leakage of the hydraulic cylinder during the opening and closing of the sliding water nozzle of the continuous casting ladle, and avoiding the safety hazard of the sliding water nozzle of the continuous casting ladle not being able to be opened or closed during the production process.

[0010] This new design effectively extends the service life of hydraulic cylinders, saving significant manpower and resources. While conventional hydraulic cylinders require maintenance after only one to two months of use, air-cooled hydraulic cylinders require maintenance after more than 24 months. The accident rate of air-cooled hydraulic cylinders is over 95% lower than that of conventional hydraulic cylinders. This design is widely used in the opening and closing of sliding nozzles for continuous casting ladles in steel mills. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural diagram of the utility model;

[0012] In the figure: piston rod 1, piston rod seal 2, hydraulic cylinder body 3, hydraulic cylinder exhaust hole 4, hydraulic cylinder air cooling jacket 5, hydraulic cylinder piston seal 6, hydraulic cylinder air inlet pipe 7, hydraulic cylinder piston 8. DETAILED DESCRIPTION

[0013] The present invention will be further described below with reference to the accompanying drawings and examples.

[0014] Refer to the attached Figure 1 A continuous casting ladle sliding water gate switch air-cooled hydraulic cylinder comprises a piston rod 1, a piston rod seal 2, a hydraulic cylinder body 3, a hydraulic cylinder exhaust hole 4, a hydraulic cylinder air-cooling jacket 5, a hydraulic cylinder piston seal 6, a hydraulic cylinder air inlet pipe 7 and a hydraulic cylinder piston 8. The hydraulic cylinder piston rod seal 2 is arranged in the cylinder head sealing groove of the hydraulic cylinder body 3, the piston seal 6 is arranged in the sealing groove of the hydraulic cylinder piston 8, the hydraulic cylinder air-cooling jacket 5 is welded to the hydraulic cylinder body 3, and an air-cooling chamber is formed between the hydraulic cylinder air-cooling jacket 5 and the hydraulic cylinder body 3. The hydraulic cylinder air-cooling jacket 5 is provided with a hydraulic cylinder air inlet pipe 7 and a hydraulic cylinder exhaust hole 4 connected to the air-cooling chamber.

[0015] In this embodiment, refer to the attached Figure 1 The hydraulic cylinder piston rod 1 is made of 38CrMoAIAn alloy structural steel, which is turned and ground after forging, and then subjected to quenching and tempering treatment.

[0016] The hydraulic cylinder piston rod seal 2 is installed in the cylinder head sealing groove of the hydraulic cylinder body 3.

[0017] The hydraulic cylinder exhaust hole 4 is six evenly distributed small holes of φ6mm drilled on the hydraulic cylinder air cooling jacket 5.

[0018] The hydraulic cylinder air cooling jacket 5 is welded to the hydraulic cylinder body 3 .

[0019] The piston seal 6 is installed in the sealing groove of the hydraulic cylinder piston 8.

[0020] The hydraulic cylinder air inlet pipe 7 is welded to the hydraulic cylinder air cooling jacket 5 .

[0021] An embodiment of the present invention is as follows:

[0022] Hydraulic cylinder body 3 model: φ100 / φ45-205, hydraulic cylinder piston rod 1 material is 38CrMoAIAn alloy structural steel, surface quenched and tempered, quenched and tempered hardness HB=260-270, surface roughness Ra0.4-0.8u. Piston rod diameter is 45mm, stroke is 205mm;

[0023] Model of hydraulic cylinder piston rod seal 2; dust ring: 45*55.6*7, step seal: 45*55.7*4.2, made of fluororubber imported from the United States;

[0024] The hydraulic cylinder exhaust hole 4 is made by drilling 6 small holes of φ6mm on the hydraulic cylinder air cooling jacket 5;

[0025] The hydraulic cylinder air cooling jacket 5 has an outer diameter of φ140mm, an inner diameter of φ125mm, a length of 200mm, and is supplied with compressed air;

[0026] Hydraulic cylinder piston seal 6 model: Gleifone 100*84.5*6.3, made of fluororubber imported from the United States;

[0027] The hydraulic cylinder air inlet pipe 7 is welded to the hydraulic cylinder air cooling jacket 5, the joint thread is M22*1.5, and the spherical seal is used.

[0028] The method of using the utility model is as follows:

[0029] First, complete the overall assembly and pressure test of the air-cooled hydraulic cylinder. Then, install the hydraulic cylinder on the hanging device of the continuous casting ladle water inlet opening and closing hydraulic cylinder; connect the hydraulic cylinder inlet and return oil pipes, and connect the hydraulic cylinder cooling air inlet pipe; during production, install the hydraulic cylinder on the ladle sliding water inlet mechanism; open the cooling air ball valve to cool the hydraulic cylinder; after the ladle sliding water inlet is closed, remove the hydraulic cylinder and close the cooling air inlet ball valve.

Claims

1. An air-cooled hydraulic cylinder for sliding nozzle switch of a continuous casting ladle, characterized by: The hydraulic cylinder comprises a piston rod (1), a piston rod seal (2), a hydraulic cylinder body (3), a hydraulic cylinder exhaust hole (4), a hydraulic cylinder air cooling jacket (5), a hydraulic cylinder piston seal (6), a hydraulic cylinder air inlet pipe (7) and a hydraulic cylinder piston (8), wherein the hydraulic cylinder piston rod seal (2) is arranged in a cylinder head sealing groove of the hydraulic cylinder body (3), the piston seal (6) is arranged in a sealing groove of the hydraulic cylinder piston (8), the hydraulic cylinder air cooling jacket (5) is welded to the hydraulic cylinder body (3), an air cooling chamber is formed between the hydraulic cylinder air cooling jacket (5) and the hydraulic cylinder body (3), and the hydraulic cylinder air cooling jacket (5) is provided with a hydraulic cylinder air inlet pipe (7) and a hydraulic cylinder exhaust hole (4) which are connected to the air cooling chamber.

2. The air-cooled hydraulic cylinder for sliding nozzle switch of continuous casting ladle according to claim 1, characterized in that: A hydraulic cylinder air inlet pipe (7) on the hydraulic cylinder air cooling jacket (5) that is in communication with the air cooling chamber is welded to the hydraulic cylinder air cooling jacket (5).

3. The air-cooled hydraulic cylinder for sliding nozzle switch of continuous casting ladle according to claim 2, characterized in that: The hydraulic cylinder exhaust holes (4) on the hydraulic cylinder air cooling jacket (5) that are in communication with the air cooling chamber are a plurality of small holes evenly arranged in the circumferential direction of the hydraulic cylinder air cooling jacket (5).

4. The air-cooled hydraulic cylinder for sliding nozzle switch of continuous casting ladle according to claim 3, characterized in that: The hydraulic cylinder exhaust holes (4) on the hydraulic cylinder air cooling jacket (5) that are connected to the air cooling chamber are six φ6 mm small holes evenly arranged in the circumferential direction of the hydraulic cylinder air cooling jacket (5).

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