Sealing ring for continuous casting roller

Abstract

The utility model relates to the technical field of sealing rings, and discloses a continuous casting roller sealing ring which comprises a main body, an inner lip is arranged on the inner side of the main body, an outer lip is arranged on the outer side of the main body, a containing groove is formed between the outer lip and the inner lip, the inner lip is a sealing convex ring inclined by 49 degrees, and a vertical flat notch is formed in the inner ring of the inner lip. By changing the sharp corner design of the inner lip into the vertical flat notch, the contact area is increased, so that the sealing effect is improved, the possibility of cooling water leakage is reduced, abrasion is reduced due to the design of the vertical flat notch, the durability of the sealing ring is improved, the service life is prolonged, the sealing ring is simpler and more convenient to install due to the design of the vertical flat notch, and the service life is prolonged. And the design of the vertical flat notch can better adapt to the temperature change in the continuous casting process, and the reduction of the sealing effect caused by material expansion is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of sealing rings, and in particular relates to a continuous casting roller sealing ring. Background Art

[0002] Continuous casting in a steel mill is the core equipment for steelmaking. Whether the continuous casting roller leaks during use determines the quality of the steel billet. Poor sealing effect of the sealing ring leads to frequent leakage. The temperature of the steel billet is 700℃, while the cooling water temperature of the continuous casting roller is 50℃-80℃. Water directly pouring onto the steel billet will lower the temperature of the steel billet and cause the steel billet to bend, which has a great impact on the quality of the steel billet.

[0003] like Figure 1 As shown, when the sealing ring of the continuous casting roller is in use, the sealing ring is installed in the following position: two continuous casting rollers are connected on the frame through a cooling pipe, and four sealing rings seal the water so that the cooling water circulates through the water holes of the rollers to achieve the effect of cooling the rollers.

[0004] like Figure 2-3 The figure shows the seal ring currently in use. The inner ring of the seal ring is sharp-angled, and the contact with the seal is point contact, with a small contact area. Due to the small contact area, the seal ring may not be able to completely close the gap, resulting in cooling water leakage, affecting the uniform cooling of the billet. The sharp-angle design is easy to wear during use, resulting in damage to the seal ring, requiring more frequent replacement, increasing maintenance costs. The seal ring with a sharp-angle design is more easily damaged during installation, and has higher requirements for installation technology. In addition, the seal ring is often made of materials such as silicone rubber, which may expand in a high-temperature environment, resulting in a further decrease in the sealing effect. Utility Model Content

[0005] In order to make up for the deficiencies of the prior art, the utility model provides a continuous casting roller sealing ring.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A continuous casting roller sealing ring comprises a main body, wherein an inner lip is arranged inside the main body, an outer lip is arranged outside the main body, an accommodating groove is arranged between the outer lip and the inner lip, the inner lip is a sealing convex ring inclined at 49 degrees, and a vertical flat cut is arranged at the inner circle of the inner lip.

[0008] Preferably, the accommodating groove is a groove with an opening of 49° which is opened from the inner wall surface of the outer lip toward the outer wall surface of the inner lip.

[0009] Preferably, the accommodating groove is pushed open by an elastic ring placed in the accommodating groove, so that the inner lip can continuously and stably press the sealed surface to maintain a stable sealing effect.

[0010] By designing the groove with an opening of 49°, the accommodating groove can better adapt to the shape and movement of the continuous casting roller, so that the sealing ring can fit more closely on the sealed surface, thereby improving the sealing effect.

[0011] Preferably, the inner top end of the outer lip is provided with a chamfered corner.

[0012] The design of the beveled angle can reduce the friction when the sealing ring contacts the continuous casting roller, thereby reducing wear and improving the durability of the sealing ring.

[0013] Preferably, two arc-shaped concave annular grooves are arranged at the contact point between the inner lip and the sealed surface. The design of the arc-shaped concave annular grooves increases the contact area between the inner lip and the sealed surface, thereby improving the sealing effect.

[0014] Preferably, the top of the outer lip is provided with a sealing outer convex ring extending outwardly in an inclined manner. The design of the outer convex ring can make the sealing ring better adapt to the shape of the continuous casting roller, thereby improving the sealing effect.

[0015] Preferably, the main body is made of nitrile rubber material, and the nitrile rubber material is made by copolymerization of butadiene and acrylonitrile.

[0016] Compared with the prior art, the technical effects and advantages of the utility model are:

[0017] The continuous casting roller sealing ring increases the contact area by changing the sharp angle design of the inner lip to a vertical flat cut, thereby improving the sealing effect and reducing the possibility of cooling water leakage. The vertical flat cut design reduces wear, improves the durability of the sealing ring, and extends the service life. The vertical flat cut design makes the installation of the sealing ring easier and reduces the difficulty and risk of installation. The vertical flat cut design can better adapt to temperature changes during the continuous casting process and reduce the decline in sealing effect caused by material expansion.

[0018] The beveled corner design reduces friction and wear, further improving the durability of the seal. The arc-shaped concave ring groove design increases the contact area, provides more support and fixing points, enhances the stability of the seal, and reduces the risk of leakage. The outer convex ring design improves the grip and prevents the seal from falling off, better adapts to the shape of the continuous casting roller, and improves the sealing effect.

[0019] The nitrile rubber material used in the sealing ring has good temperature resistance, oil resistance, wear resistance and bonding properties, which enables the sealing ring to work stably in the temperature range of -40℃ to 120℃, meeting the temperature requirements of the continuous casting process. The price of the nitrile rubber material is cost-effective, and the adjustment of the hardness makes it more suitable for the water pipe, improving the sealing effect.

[0020] In summary, the design of the continuous casting roll seal ring has significant benefits in improving sealing effect, durability, ease of installation, temperature adaptability, seal ring adhesion, material properties, cost performance and service life, thereby improving the production efficiency of the steel mill and the quality of the steel billet. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a state diagram of the continuous casting roller in use with a sealing ring;

[0022] Figure 2 It is a structural schematic diagram of a sealing ring in the prior art;

[0023] Figure 3 for Figure 2 The main cross-section of

[0024] Figure 4 It is a schematic diagram of the structure of the utility model;

[0025] Figure 5 For this utility model Figure 4 The main cross-section of

[0026] In the figure: 1. main body; 2. inner lip; 3. outer lip; 4. receiving groove; 5. vertical flat incision; 6. beveled corner; 7. arc-shaped concave ring groove; 8. sealing outer convex ring; 9. sharp corner; 10. continuous casting roller; 100. sealing ring. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] The following is combined with Figure 4-5 To further explain this application in detail,

[0029] An embodiment of the present application discloses a continuous casting roller sealing ring, comprising a main body 1, wherein an inner lip 2 is arranged on the inner side of the main body 1, an outer lip 3 is arranged on the outer side, an accommodating groove 4 is arranged between the outer lip 3 and the inner lip 2, the inner lip 2 is a sealing convex ring inclined at 49 degrees, and a vertical flat cut 5 is arranged on the inner circle of the inner lip 2.

[0030] The vertical flat cut 5 increases the width of the inner ring of the sealing ring 100, changing the original sharp corner 9 into a vertical flat cut 5 with a width of 0.75 mm, and the point contact becomes a surface contact, and the contact area increases. Due to the increase in the contact area, the contact between the sealing ring 100 and the continuous casting roller 10 is more uniform, which can better prevent the leakage of cooling water and ensure the quality and production efficiency of the steel billet. The sharp corner 9 design is prone to high stress concentration during contact, resulting in rapid wear of the sealing ring 100. The flat cut design distributes the pressure due to the large contact area, reduces the possibility of wear, and thus extends the service life of the sealing ring 100. The sealing ring 100 with the sharp corner 9 design is more easily damaged during installation, and has higher requirements for installation technology. The flat cut design may make the installation of the sealing ring 100 easier and reduce the difficulty and risk of installation due to the changes in its shape and contact mode. During the continuous casting process, the temperature of the roller and the temperature of the cooling water may change. The flat cut design can better adapt to these temperature changes and reduce the decline in sealing effect caused by material expansion.

[0031] Preferably, the accommodating groove 4 is a groove with an opening of 49° which is opened from the inner wall surface of the outer lip 3 toward the outer wall surface of the inner lip 2 .

[0032] Preferably, the accommodating groove 4 is pushed open by an elastic ring placed in the accommodating groove 4, so that the inner lip 2 can continuously and stably press the sealed surface to maintain a stable sealing effect.

[0033] Through the design of the groove with an opening of 49°, the accommodating groove 4 can better adapt to the shape and movement of the continuous casting roller 10, so that the sealing ring 100 can fit more closely on the sealed surface, thereby improving the sealing effect. The use of the elastic ring can ensure that the inner lip 2 continuously and stably presses the sealed surface, and even in the dynamic operation of the continuous casting roller 10, the stability of the sealing effect can be maintained, reducing the possibility of leakage. Due to the design of the elastic ring opening the accommodating groove 4, the sealing ring 100 can better restore its shape when subjected to pressure, reducing fatigue damage caused by long-term pressure, and extending the service life of the sealing ring 100.

[0034] Preferably, the inner top end of the outer lip 3 is provided with a chamfered corner 6 .

[0035] The design of the chamfered angle 6 can reduce the friction when the sealing ring 100 contacts the continuous casting roller 10 , thereby reducing wear and improving the durability of the sealing ring 100 .

[0036] Preferably, two arc-shaped concave annular grooves 7 are provided at the contact point between the inner lip 2 and the sealed surface.

[0037] The design of the arc-shaped concave annular groove 7 increases the contact area between the inner lip 2 and the sealed surface, thereby improving the sealing effect. The design of the two arc-shaped concave annular grooves 7 can provide more support and fixing points, enhance the stability of the sealing ring 100, and prevent it from shifting during operation. The arc-shaped concave annular groove 7 can capture and stabilize the sealing ring 100, and can effectively reduce the risk of leakage even in high-speed or dynamic environments.

[0038] Preferably, a sealing outer convex ring 8 extending outwardly and obliquely is provided at the top end of the outer lip 3 .

[0039] The outward-inclined outer convex ring design can improve the grip of the sealing ring 100 and prevent it from falling off during operation. The design of the outer convex ring can make the sealing ring 100 better adapt to the shape of the continuous casting roller 10, thereby improving the sealing effect. The outer convex ring provides additional protection, reduces damage caused by the mismatch between the sealing ring 100 and the surface of the continuous casting roller 10, and extends the service life of the sealing ring 100.

[0040] Preferably, the main body 1 is made of nitrile rubber material, and the nitrile rubber material is made of butadiene and acrylonitrile copolymer. The sealing ring 100 is made of nitrile rubber, and the use temperature is -30℃~100℃, while the cooling water temperature of the continuous casting roller 10 is 30℃-60℃, which can fully meet the requirements of on-site use, and the price is more cost-effective. The hardness is reduced from the original HA70 to HA60, which is more suitable for the water pipe and has a better sealing effect.

[0041] The continuous casting roller sealing ring, because the sealing ring 100 is made of nitrile butadiene rubber (HNBR) material, can work stably in the temperature range of -40°C to 120°C. During the continuous casting process, the temperature of the roller may reach 700°C, while the temperature of the cooling water is between 50°C and 80°C. The temperature resistance of nitrile butadiene rubber enables the sealing ring 100 to maintain good elasticity and sealing performance within this temperature range, and is not affected by high and low temperatures. The design of the sealing ring 100 increases the contact area with the continuous casting roller 10. The original sharp corner 9 design is transformed into a vertical flat cut 5 with a width of 0.75mm, so that the contact is transformed from point contact to surface contact, increasing the contact area. This design not only improves the sealing effect, but also reduces the friction and wear between the sealing ring 100 and the continuous casting roller 10, thereby extending the service life of the sealing ring 100.

[0042] The sealing ring 100 is installed on the two continuous casting rollers 10 and connected by a water pipe so that the cooling water can circulate through the water pipe. This circulation system can evenly transport the cooling water to the continuous casting rollers 10 to control and adjust the temperature of the rollers, thereby ensuring uniform cooling of the steel billet.

[0043] Since the sealing ring 100 increases the contact area and improves the sealing effect, the possibility of water leakage is greatly reduced. This not only improves the quality of the steel billet, but also helps to improve production efficiency and reduce downtime caused by water leakage. The improved design of the sealing ring 100 increases its online service life from the original six months to one year. This not only reduces the frequency of maintenance and replacement of the sealing ring 100, reduces maintenance costs, but also helps to increase the overall service life of the continuous casting segment.

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

Claims

1. A continuous casting roller sealing ring, characterized in that: The invention comprises a main body (1), wherein an inner lip (2) is arranged on the inner side of the main body (1), an outer lip (3) is arranged on the outer side, a receiving groove (4) is arranged between the outer lip (3) and the inner lip (2), the inner lip (2) is a sealing convex ring inclined at 49 degrees, and a vertical flat cutout (5) is arranged on the inner ring of the inner lip (2).

2. A continuous casting roller sealing ring according to claim 1, characterized in that: The accommodating groove (4) is a groove with an opening of 49°, which is opened from the inner wall of the outer lip (3) toward the outer wall of the inner lip (2).

3. The continuous casting roller sealing ring according to claim 1, characterized in that: The accommodating groove (4) is pushed open by an elastic ring placed in the accommodating groove (4), so that the inner lip (2) can continuously and stably press against the sealed surface.

4. The continuous casting roller sealing ring according to claim 1, characterized in that: The inner top end of the outer lip (3) is provided with a chamfered corner (6).

5. The continuous casting roller sealing ring according to claim 1, characterized in that: Two arc-shaped concave annular grooves (7) are provided at the contact point between the inner lip (2) and the sealed surface.

6. The continuous casting roller sealing ring according to claim 1, characterized in that: The top end of the outer lip (3) is provided with a sealing outer convex ring (8) extending outwards in an inclined manner.

7. The continuous casting roller sealing ring according to claim 1, characterized in that: The main body (1) is made of a nitrile rubber material, and the nitrile rubber material is made by copolymerization of butadiene and acrylonitrile.

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