Water-cooling oil cylinder protection device of on-line assembly type converter slag stopping mechanism

Abstract

The utility model discloses a water-cooling oil cylinder protection device of an on-line assembly type converter slag stopping mechanism, which is characterized in that an oil cylinder side plate is arranged on one side of a datum plate shaped like a Chinese character'tu ', and an oil cylinder top cover is arranged above the oil cylinder side plate, so that the U-shaped water-cooling oil cylinder protection device with three sealed surfaces can be automatically formed by the oil cylinder side plate and an oil cylinder protection plate. The oil cylinder protection device can be fixed at corresponding positions through bolts to complete online assembly, effective protection of a water-cooling oil cylinder is achieved, meanwhile, the mechanism top cover is arranged above the connecting plate and fixedly connected with the connecting plate through bolts to complete online assembly, the slag stopping mechanism protection device is formed, effective protection of a converter slag stopping mechanism is achieved, and the service life of the converter slag stopping mechanism is prolonged. The safety protection device is simple in online assembly, short in construction period, long in service life, low in comprehensive cost, easy to maintain and replace, wide in application range and good in protection effect on the water-cooled oil cylinder and the converter slag stopping mechanism, and is an ideal substitute product of a current converter slag stopping mechanism protection cover.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of steelmaking machinery, and particularly relates to a water-cooled oil cylinder protection device of an online assembly type converter slag blocking mechanism installed at a converter tapping hole. BACKGROUND

[0002] The converter steelmaking adopts a tapping hole sliding plate slag blocking tapping process, and is continuously applied in steelmaking plants due to good slag blocking effect, simple operation and low labor intensity. When tapping, the converter is tilted by 80 to 110 degrees, the molten steel flows into a ladle through the sliding plate brick and the outer water gap brick, when the slag is detected, the water-cooled oil cylinder is rapidly started and the sliding plate brick is closed, and the tapping hole sliding plate slag blocking operation is completed.

[0003] During the converter smelting process, the fan-shaped slag stopping apron around the converter shell seems to put on a layer of armor for the converter body, and the high-temperature liquid slag continuously overflowing from the converter mouth and high-altitude falling objects fall along the fan-shaped slag stopping apron, effectively protecting the converter body and auxiliary equipment below the slag stopping apron. During the online construction of the converter slide plate slag stopping project, the converter slag stopping apron above the converter slag stopping mechanism and the water-cooled oil cylinder must be cut off first, so that the converter slag stopping mechanism and the water-cooled oil cylinder can be installed outside the tapping hole. In order to avoid the failure of the slide plate slag stopping due to the liquid steel slag overflowing from the converter mouth flowing into the slag stopping mechanism and the water-cooled oil cylinder being unable to drive the slag stopping mechanism, the reduction of the service life of the water-cooled oil cylinder or even its scrap due to the impact of the liquid steel slag, and the reduction of the service life or even the early scrap of the equipment due to the high-altitude falling objects, a large mechanism protection cover plate must be re-welded at the cutting position of the converter slag stopping apron to completely cover the converter slag stopping mechanism and the water-cooled oil cylinder. The mechanism protection cover plate on the market has the following problems: (1) The total length of the converter slag stopping mechanism to the water-cooled oil cylinder is about 2 meters. For the transversely installed slag stopping mechanism, the total length of the mechanism protection cover is not less than 2 meters. Such a long mechanism protection cover is composed of multiple steel plates on site and is assembled on the fan-shaped slag stopping apron of the converter. The construction difficulty is high, the welding workload is large, and the construction period is long, thus increasing the maintenance period of the converter. The construction quality of the mechanism protection cover plate cannot be guaranteed, and the service life of the mechanism protection cover is seriously reduced due to the long-term impact of high-temperature steel slag and high-altitude falling objects during use. (2) Regardless of the deformation or shedding of the steel plate, the construction and repair of the mechanism protection cover plate on the converter slag stopping apron behind the converter is very difficult, and due to the influence of the continuous production rhythm of the steelmaking, it is often impossible to repair immediately, thus losing the effective protection of the slag stopping mechanism and the water-cooled oil cylinder, causing the slag stopping mechanism and the water-cooled oil cylinder to be impacted by the high-temperature steel slag overflowing from the converter mouth and high-altitude falling objects for a long time, reducing the service life of the equipment, and even causing the failure of the slide plate slag stopping of the converter. (3) During the construction and transformation of the converter slide plate slag stopping, some steel plants directly cancel the construction and welding of the mechanism protection cover plate due to the short maintenance period of the converter, causing the slag stopping mechanism and the water-cooled oil cylinder to be directly impacted by the high-temperature liquid steel slag overflowing from the converter mouth and high-altitude falling objects during the converter smelting process, reducing the service life of the equipment, and even causing the serious consequences of the failure of the slide plate slag stopping of the converter. (4) Some steel plants use steel plates to connect the converter shell, oil cylinder seat, connecting plate, and drag ring together during the construction and transformation of the converter slide plate slag stopping, and seal the water-cooled oil cylinder inside the steel plate to protect the water-cooled oil cylinder. The service life of the water-cooled oil cylinder is generally 1-2 months and needs to be replaced irregularly. When the water-cooled oil cylinder needs to be replaced, the previously welded sealing steel plate must be completely cut off and re-welded, which obviously increases the workload and replacement time of the water-cooled oil cylinder. When the production rhythm of the steelmaking is tight, the water-cooled oil cylinder cannot be replaced in time, the slide plate slag stopping cannot be carried out normally, and the production and product quality of the steelmaking are further affected.(5) When the tundish slag stopping tapping is performed, the molten steel injection into the ladle in the converter needs to be dynamically observed so that the operator can perform the ladle moving operation and the converter tilting operation in real time, but the mechanism protection cover plate on the corresponding part of the tundish slag stopping mechanism is far away from the tundish slag stopping mechanism and has a large size, which often affects the observation angle of the operator when the molten steel is injected into the ladle during the late tundish slag stopping tapping, and further affects the ladle moving operation and the converter tilting operation, and in severe cases, the steel plate at the position can only be partially cut off, which causes the mechanism protection cover to lose the effective protection of the tundish slag stopping mechanism, and the tundish slag stopping mechanism is directly impacted by the high-temperature overflow liquid slag and high-altitude falling objects from the furnace mouth during the converter smelting process, and in severe cases, the tundish slag stopping mechanism cannot be normally driven, and the slide plate tundish slag stopping fails. Content of the utility model

[0004] In order to solve the above technical problems, the utility model provides a kind of online assembly type converter tundish slag stopping mechanism and water-cooled oil cylinder protection device.

[0005] The technical scheme of the utility model is: a kind of online assembly type converter tundish slag stopping mechanism water-cooled oil cylinder protection device, including datum plate, connecting plate, converter tundish slag stopping mechanism and protection device, water-cooled oil cylinder and protection device, the datum plate is set on the outside of tundish flange, connecting plate is set on the outer side of datum plate, converter tundish slag stopping mechanism is set on the outside of connecting plate and is connected together with connecting plate with knuckle bolt, connecting plate left side is provided with oil cylinder support, oil cylinder support top is provided with oil cylinder shield, water-cooled oil cylinder is provided with oil cylinder outside connecting plate, water-cooled oil cylinder is connected together with the sliding frame of converter tundish slag stopping mechanism;Oil cylinder side plate is provided on the left side of datum plate, and oil cylinder side plate is connected together with datum plate so that datum plate is in the shape of "convex", and bolt hole m is symmetrically provided on the upper and lower sides of oil cylinder side plate, respectively, oil cylinder top cover is provided on the upper portion of oil cylinder side plate along its length direction, and oil cylinder top cover is located above water-cooled oil cylinder and is connected together with bolt and bolt hole m;Two groups of bolt holes n are symmetrically provided on the upper and lower sides of connecting plate, and mechanism top cover is provided on the upper portion of connecting plate along its length direction, and mechanism top cover is located above converter tundish slag stopping mechanism and is connected together with bolt and bolt hole n.

[0006] Preferably, the oil cylinder top cover is composed of a top plate m, a fixed plate m and a rib plate m, the fixed plate m is in the shape of an isosceles trapezoid, a plurality of fixed holes m are uniformly arranged on the fixed plate m, and the fixed holes m correspond to the bolt holes m on the oil cylinder side plate.

[0007] Preferably, the height H1 of the oil cylinder top cover is greater than the distance H2 from the oil cylinder shield to the datum plate, the outer sides of the oil cylinder top cover, the oil cylinder shield and the oil cylinder side plate are aligned, and the three together constitute a U-shaped water-cooled oil cylinder protection device.

[0008] Preferably, the mechanism top cover is composed of a top plate n, a fixed plate n and a rib plate n, and a plurality of fixed holes n are uniformly arranged on the fixed plate n and correspond to the bolt holes n on the connecting plate.

[0009] Preferably, the height H3 of the mechanism top cover is not less than the distance H4 from the outer nozzle of the converter slag stopping mechanism to the connecting plate, so that the top cover is located above the converter slag stopping mechanism and constitutes the protection device of the converter slag stopping mechanism.

[0010] Preferably, the included angle A1 between the top plate m and the fixed plate m of the oil cylinder top cover is 80-90°.

[0011] Preferably, the oil cylinder top cover is arranged in a left-right symmetrical manner and can be installed above or below the oil cylinder side plate.

[0012] Preferably, the included angle A2 between the top plate n and the fixed plate n of the mechanism top cover is 70-90°.

[0013] Preferably, the mechanism top cover is arranged in a left-right symmetrical manner and can be installed above or below the connecting plate.

[0014] The utility model discloses the beneficial effect is:

[0015] The three-seal U-shaped water-cooled oil cylinder protection device composed of the oil cylinder side plate, the oil cylinder top cover and the oil cylinder guard plate and the converter slag stopping mechanism protection device composed of the mechanism top cover only need to be fixed in the corresponding position of the datum plate or the connecting plate by bolts, so that the construction of the slag stopping mechanism and the water-cooled oil cylinder protection device can be completed, the damage of the high-temperature liquid slag and the high-altitude falling objects outside the converter mouth to the water-cooled oil cylinder and the converter slag stopping mechanism is effectively prevented, compared with the online welding construction mode of the traditional mechanism protection cover plate, the installation time of the protection device is short, the converter overhaul and repair cycle time is almost not occupied, and the construction engineering quantity is small and the construction cost is low.

[0016] The U-shaped protection device of the water-cooled oil cylinder sets the height H1 of the oil cylinder top cover to be greater than the distance H2 from the oil cylinder guard plate to the datum plate, the included angle A1 between the top plate m and the fixed plate m of the oil cylinder top cover is set to be 80-90°, the preferred angle A1 is 80-85°, the impact of the high-temperature liquid slag and the high-altitude falling objects outside the converter mouth on the oil cylinder top cover is reduced, the U-shaped protection device can smoothly fall down, the protection effect of the U-shaped protection device on the water-cooled oil cylinder in the converter smelting process is improved, and the service life of the water-cooled oil cylinder is improved.

[0017] In the converter slag blocking mechanism protection device, the mechanism top cover height H3 is set to be not less than the distance H4 from the outer water gap to the connecting plate, the angle A2 between the top plate n and the fixed plate n in the mechanism top cover is set to be in the range of 70-90 degrees, and the preferred angle A2 is 70-80 degrees, so as to reduce the impact of the high-temperature liquid slag and high-falling objects on the converter slag blocking mechanism, and to smoothly fall down, improve the protection effect of the converter slag blocking mechanism protection device on the converter slag blocking mechanism in the converter smelting process, ensure the normal operation of the converter slide plate slag blocking and tapping, and improve the service life of the converter slag blocking mechanism.

[0018] The cross section of the oil cylinder top cover in the water-cooled oil cylinder U-shaped protection device is set to be triangular structure, and the height H1 of the oil cylinder top cover is much smaller than the length of the steel plate at the corresponding position of the conventional mechanism protection cover, so as to greatly improve the service life of the water-cooled oil cylinder U-shaped protection device.

[0019] The cross section of the mechanism top cover in the converter slag blocking mechanism protection device is set to be triangular structure, and the height H3 of the mechanism top cover is much smaller than the length of the steel plate at the corresponding position of the conventional mechanism protection cover, so as to greatly improve the service life of the converter slag blocking mechanism protection device, increase the viewing angle of the operator when observing the molten steel in the furnace pouring into the ladle, and the preferred angle A2 is set to be 70-80 degrees, so as to further increase the viewing angle of the operator when observing the molten steel in the furnace pouring into the ladle, and improve the accuracy of the operator moving the ladle and tilting the converter.

[0020] When replacing the water-cooled oil cylinder, the oil cylinder guard and the fixing bolts of the oil cylinder top cover are sequentially removed to complete the replacement, and after the replacement of the water-cooled oil cylinder is completed, the oil cylinder top cover and the oil cylinder guard are sequentially fixed to complete the replacement, and the fixing bolts of the oil cylinder top cover are arranged below the oil cylinder top cover, so as to facilitate disassembly and significantly shorten the online replacement time of the water-cooled oil cylinder.

[0021] The oil cylinder top cover structure is completely symmetrical left and right, and can be installed above or below the oil cylinder side plate, and the mechanism top structure is completely symmetrical left and right, and can be installed above or below the connecting plate, so that for the transversely installed slag blocking mechanism, whether the water-cooled oil cylinder is arranged on the left side or the right side of the connecting plate, the installation positions of the oil cylinder top cover and the mechanism top cover are only exchanged, and the effective protection of the water-cooled oil cylinder and the slag blocking mechanism can be realized.

[0022] The utility model discloses a " convex " type datum plate one side sets up the oil cylinder side plate, sets up the oil cylinder top cover above the oil cylinder side plate, can constitute the U type water -cooled oil cylinder protection device of three -sided seal with the oil cylinder guard automatically, this oil cylinder protection device is fixed with bolt in corresponding position respectively and can complete the on -line assembly, realizes the effective protection to water -cooled oil cylinder, sets up mechanism top cover above the connecting plate and is fixed together with the connecting plate with bolt connection and completes the on -line assembly, forms the protection device of slag -stopping mechanism, realizes the effective protection to converter slag -stopping mechanism, it is simple, the construction time is short, produces long life, the comprehensive cost is low, is easy to maintain replacement and is suitable for a wide range, and the protection effect is good to water -cooled oil cylinder and converter slag -stopping mechanism, is ideal alternative product of present converter slag -stopping mechanism protection cover. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is the three -dimensional structure schematic diagram of the utility model water -cooled oil cylinder protection device and converter slag -stopping mechanism protection device (simplified model is slag -stopping mechanism, converter smelting state);

[0024] Figure 2 It is the three -dimensional structure schematic diagram of the utility model oil cylinder top cover;

[0025] Figure 3 It is the three -dimensional structure schematic diagram of the utility model " convex " type datum plate (hidden datum plate and the connecting bolt hole of tapping hole flange and connecting plate);

[0026] Figure 4 It is the three -dimensional structure schematic diagram of the utility model U type sealing protection device of water -cooled oil cylinder (converter smelting state);

[0027] Figure 5 It is Figure 4 M direction view;

[0028] Figure 6 It is the three -dimensional structure schematic diagram of the utility model mechanism top cover;

[0029] Figure 7 It is the three -dimensional structure schematic diagram of the utility model mechanism top cover and connecting plate assembly together (hidden connecting plate and datum plate, the connecting bolt hole between connecting plate and oil cylinder pedestal);

[0030] Figure 8 It is the three -dimensional structure schematic diagram of the utility model converter slag -stopping mechanism protection device (simplified model is slag -stopping mechanism, converter smelting state);

[0031] Figure 9 It is Figure 8 K direction view.

[0032] In the figure, 10. reference plate, 101. oil cylinder side plate, 102. bolt hole m, 20. oil cylinder top cover, 201. top plate m, 202. fixed plate m, 203. rib plate m, 204. fixed hole m, 21. oil cylinder cover plate, 30. connecting plate, 301. bolt hole n, 302. joint seat, 31. oil cylinder holder, 32. water-cooled oil cylinder, 321. medium pipeline, 35. slag stopping mechanism, 36. outer water gap, 37. sliding frame, 40. mechanism top cover, 401. top plate n, 402. fixed plate n, 403. rib plate n, 404. fixed hole n.

[0033] H1--oil cylinder top cover height; H2--distance from oil cylinder cover plate to reference plate; A1--angle between top plate and fixed plate of oil cylinder top cover; H3--mechanism top cover height; H4--distance from outer water gap to connecting plate; A2--angle between top plate and fixed plate of mechanism top cover. DETAILED DESCRIPTION

[0034] Example one, see the description attached Figures 1-9 A water-cooled oil cylinder protection device for an online assembled converter slag stopping mechanism, comprising a reference plate 10, a connecting plate 30, a converter slag stopping mechanism 35 and a protection device, a water-cooled oil cylinder 32 and a protection device, the reference plate 10 is arranged outside the taphole flange, the connecting plate 30 is arranged on the outer side of the reference plate 10, the converter slag stopping mechanism 35 is arranged outside the connecting plate 30 and connected together with the connecting plate 30 by a joint bolt, the oil cylinder holder 31 is arranged on the left side of the connecting plate 30, the oil cylinder holder 31 is arranged on the top of the oil cylinder holder 31, the water-cooled oil cylinder 32 is arranged outside the oil cylinder holder 31, and the water-cooled oil cylinder 32 is connected together with the sliding frame 37 of the converter slag stopping mechanism 35. An oil cylinder side plate 101 is arranged on the left side of the reference plate 10, and the oil cylinder side plate 101 is connected together with the reference plate 10 to make the reference plate 10 in the shape of "convex", and the upper and lower sides of the oil cylinder side plate 101 are symmetrically arranged with bolt holes m 102, and the upper part of the oil cylinder side plate 101 is arranged along the length direction of the oil cylinder side plate 101 with an oil cylinder top cover 20, and the oil cylinder top cover 20 is located above the water-cooled oil cylinder 32 and connected together with the bolt holes m 102 by bolts. Two groups of bolt holes n 301 are symmetrically arranged on the upper and lower sides of the connecting plate 30, and the upper part of the connecting plate 30 is arranged along the length direction of the connecting plate 30 with a mechanism top cover 40, and the mechanism top cover 40 is located above the converter slag stopping mechanism 35 and connected together with the bolt holes n 301 by bolts.

[0035] The oil cylinder top cover 20 is composed of a top plate m 201, a fixed plate m 202 and a rib plate m 203, the fixed plate m 202 is in the shape of an isosceles trapezoid, and a plurality of fixed holes m 204 are uniformly arranged on the fixed plate m 202, and the positions of the fixed holes m 204 correspond to the positions of the bolt holes m 102 on the oil cylinder side plate 101.

[0036] The height H1 of the oil cylinder top cover 20 is greater than the distance H2 from the oil cylinder guard plate to the reference plate 10, the outer sides of the oil cylinder top cover 20, the oil cylinder guard plate and the oil cylinder side plate 101 are aligned, and the three together constitute the water-cooled oil cylinder 32 U-shaped protection device.

[0037] The mechanism top cover 40 is composed of a top plate n401, a fixed plate n402 and a rib plate n403, a plurality of fixed holes n404 are uniformly arranged on the fixed plate n402, and the fixed holes n404 correspond in position to the bolt holes n301 on the connecting plate 30.

[0038] The height H3 of the mechanism top cover 40 is not less than the distance H4 from the outer water gap 36 of the converter slag stopping mechanism 35 to the connecting plate 30, and the top cover is arranged above the converter slag stopping mechanism 35 to constitute the protection device of the converter slag stopping mechanism 35.

[0039] The included angle A1 between the top plate m201 and the fixed plate m202 of the oil cylinder top cover 20 is 80-90 degrees, and the preferred angle is 80-85 degrees, which reduces the impact damage of high-temperature overflow slag and high-altitude falling objects on the oil cylinder protection device.

[0040] The included angle A2 between the top plate n401 and the fixed plate n402 of the mechanism top cover 40 is 70-90 degrees, and the preferred angle is 70-80 degrees, which reduces the impact damage of high-temperature overflow slag and high-altitude falling objects on the converter slag stopping mechanism 35 protection device.

[0041] The oil cylinder top cover 20 is arranged in a left-right symmetrical manner and can be installed above or below the oil cylinder side plate 101, and the mechanism top cover 40 is arranged in a left-right symmetrical manner and can be installed above or below the connecting plate 30, so that for the transversely installed slag stopping mechanism 35, whether the water-cooled oil cylinder 32 is arranged on the left side or the right side of the connecting plate 30, the installation positions of the oil cylinder top cover 20 and the mechanism top cover 40 can be exchanged, and the water-cooled oil cylinder 32 and the slag stopping mechanism 35 can be effectively protected.

[0042] The use process and principle of the utility model are as follows:

[0043] When the converter slide gate slag blocking project is online construction and reconstruction, first, the converter fan-shaped slag blocking skirt plate above the converter slag blocking mechanism 35 and the water-cooled oil cylinder 32 is cut off. Second, the reference plate 10 is installed outside the tapping hole, the connecting plate 30 and the water-cooled oil cylinder 32 assembly are installed outside the reference plate 10, and the medium pipeline 321 of the water-cooled oil cylinder 32 is directed to the direction of the converter bottom. Third, the oil cylinder top cover 20 is installed on one side of the oil cylinder side plate 101 with bolts, and when the converter is smelted, the oil cylinder top cover 20 is located directly above the water-cooled oil cylinder 32, and then the oil cylinder guard plate is fixed on the oil cylinder seat 31 with bolts, thereby automatically forming a U-shaped water-cooled oil cylinder 32 protection device with three sealed sides, protecting the water-cooled oil cylinder 32 from the impact damage of the high-temperature overflow steel slag and high-altitude falling objects at the converter mouth, and improving the service life of the water-cooled oil cylinder 32. Fourth, the mechanism top cover 40 is installed on one side of the connecting plate 30 with bolts, and when the converter is smelted, the mechanism top cover 40 is located directly above the slag blocking mechanism 35, thereby protecting the converter slag blocking mechanism 35 from the impact damage of the high-temperature overflow steel slag and high-altitude falling objects at the converter mouth, and ensuring the normal operation of the converter slide gate slag blocking tapping. After the converter slide gate slag blocking equipment is put into normal use for a period of time, when the water-cooled oil cylinder 32 needs to be replaced, only the fixing bolts of the oil cylinder guard plate and the oil cylinder top cover 20 are sequentially removed, the water-cooled oil cylinder 32 is replaced, and after the replacement of the water-cooled oil cylinder 32 is completed, the bolts of the oil cylinder top cover 20 and the oil cylinder guard plate are sequentially fixed, thereby the whole replacement process of the water-cooled oil cylinder 32 is simple, time-saving, and has less impact on steelmaking production.

Claims

1. An online assembled water-cooled cylinder protection device for a converter slag dam, comprising a reference plate, a connecting plate, a converter slag dam and a protection device, a water-cooled cylinder and a protection device, characterized in that: The reference plate is arranged outside the tundish flange, the connecting plate is arranged outside the reference plate, the converter slag stopping mechanism is arranged outside the connecting plate and connected with the connecting plate by the universal bolts, the oil cylinder holder is arranged on the left side of the connecting plate, the oil cylinder guard is arranged on the top of the oil cylinder holder, the water-cooled oil cylinder is arranged outside the oil cylinder holder and connected with the sliding frame of the converter slag stopping mechanism, the oil cylinder side plate is arranged on the left side of the reference plate and connected with the reference plate to make the reference plate in the shape of "convex", the bolt holes m are symmetrically arranged on the upper and lower sides of the oil cylinder side plate, the oil cylinder top cover is arranged on the upper side of the oil cylinder side plate along the length direction of the oil cylinder side plate, the oil cylinder top cover is arranged above the water-cooled oil cylinder and connected with the bolt holes m by the bolts, and the two groups of bolt holes n are symmetrically arranged on the upper and lower sides of the connecting plate, the mechanism top cover is arranged on the upper side of the connecting plate along the length direction of the connecting plate, and the mechanism top cover is arranged above the converter slag stopping mechanism and connected with the bolt holes n by the bolts.

2. The water-cooled ram protection apparatus for an on-line assembled converter slag gate mechanism according to claim 1, characterized in that: The oil cylinder top cover is composed of the top plate m, the fixed plate m and the rib plate m, the fixed plate m is in the shape of isosceles trapezoid, and a plurality of fixed holes m are uniformly arranged on the fixed plate m and correspond to the bolt holes m on the oil cylinder side plate.

3. The water-cooled ram protection apparatus for an on-line assembled converter slag gate mechanism according to claim 1, characterized in that: The height H1 of the oil cylinder top cover is greater than the distance H2 from the oil cylinder guard to the reference plate, the oil cylinder top cover, the oil cylinder guard and the oil cylinder side plate are aligned on the outside, and the three together constitute the U-shaped protection device of the water-cooled oil cylinder.

4. The water-cooled ram protection apparatus for an on-line assembled converter slag gate mechanism according to claim 1, characterized in that: The mechanism top cover is composed of the top plate n, the fixed plate n and the rib plate n, a plurality of fixed holes n are uniformly arranged on the fixed plate n and correspond to the bolt holes n on the connecting plate.

5. The water-cooled ram protection apparatus for an on-line assembled converter slag gate mechanism according to claim 1, characterized in that: The height H3 of the mechanism top cover is not less than the distance H4 from the outer nozzle of the converter slag stopping mechanism to the connecting plate, the top cover is arranged above the converter slag stopping mechanism and constitutes the protection device of the converter slag stopping mechanism.

6. The water-cooled ram protection apparatus for an online assembled converter slag gate mechanism according to claim 1, characterized in that: The included angle A1 between the top plate m and the fixed plate m of the oil cylinder top cover is 80°-90°.

7. The water-cooled ram protection apparatus for an on-line assembled converter slag gate mechanism according to claim 1, characterized in that: The oil cylinder top cover is arranged in the left-right symmetrical arrangement form and can be arranged above the oil cylinder side plate or below the oil cylinder side plate.

8. The water-cooled ram protection apparatus for an online assembled converter slag gate mechanism according to claim 1, characterized in that: The included angle A2 between the top plate n and the fixed plate n of the mechanism top cover is 70°-90°.

9. The water-cooled ram protection apparatus for an on-line assembled converter slag gate mechanism according to claim 1, characterized in that: The mechanism top cover is arranged in the left-right symmetrical arrangement form and can be arranged above the connecting plate or below the connecting plate.

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