Hydraulic cylinder hook protection device of steel ladle sliding nozzle mechanism

By designing a hydraulic cylinder hook protection device that combines the bin frame, support plate and refractory brick, the problem of hydraulic cylinder hooks being easily stuck to steel and slag during the ladle operation is solved, effectively protecting the hooks, reducing safety risks, and simplifying the production and maintenance of the device.

CN222660113UActive Publication Date: 2025-03-25GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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Patent Information

Application Number
CN202421012745.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-11
Publication Date
2025-03-25
Estimated Expiration
2034-05-11

AI Technical Summary

Technical Problem

The prior art cannot effectively protect the hydraulic cylinder hook, resulting in easy steel and slag sticking during the ladle operation, affecting the normal operation of the equipment, increasing safety risks, and may lead to oil leakage and combustion of the hydraulic cylinder or direct scrapping, resulting in unplanned watering shutdown or liquid metal leakage accidents.

Method used

A hydraulic cylinder hook protection device for sliding water outlet mechanism of ladle is designed, and a combined structure of silo door frame, support plate and refractory brick is adopted. The refractory brick is firmly pressed into the steel groove formed by the silo door frame and support plate through the refractory brick fixing mechanism, providing all-round protection.

Benefits of technology

Effectively prevent the hook from sticking to steel and slag, reduce the risk of oil leakage in hydraulic cylinders, improve the collision resistance and reliability of the protection device, ensure smooth production and personnel safety, and simplify the production and maintenance of the device.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a steel ladle sliding gate mechanism hydraulic cylinder hook protection device which comprises a bin door frame arranged above a hydraulic cylinder hook in a buckled mode, horizontally-arranged supporting plates are fixed to the bottom ends of the two sides of the bin door frame respectively, and vertical refractory brick fixing grooves are formed between the side edges of the bin door frame and the supporting plates. Vertical refractory bricks are placed in the vertical refractory brick fixing grooves, and transverse refractory bricks are in lap joint with the top ends of the vertical refractory bricks. A refractory brick clamping and fixing mechanism is arranged above the bin door frame and comprises a vertically-arranged spring barrel, a pressure spring is arranged in the spring barrel, a fork rod is arranged in the spring barrel in a sleeved mode, and the bottom end of the fork rod is connected with a refractory brick clamping and fixing frame composed of door-shaped frame plates. According to the utility model, the refractory bricks are filled in the refractory brick fixing grooves, so that the hydraulic cylinder hook is effectively protected, and the refractory bricks are not easy to touch and fall off; the protection device is easy and convenient to manufacture, low in machining cost and convenient to operate and maintain.
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Description

Technical Field

[0001] The utility model belongs to the technical field of steel smelting, and relates to a safety protection device for ladle accessories, in particular to a hook protection device for a hydraulic cylinder of a ladle sliding nozzle mechanism. Background Art

[0002] The bottom of the ladle is equipped with a sliding nozzle mechanism, which controls the flow of molten steel by adjusting the alignment between the slide hole and the nozzle. The sliding nozzle mechanism is powered by a hydraulic cylinder hung on one side of the lower part of the ladle. Figure 1 As shown, a hydraulic cylinder hook 4 is provided on the outer wall of one side of the lower part of the ladle 1, and the cylinder body of the hydraulic cylinder 3 is hung on the hydraulic cylinder hook 4 through a T-shaped component. The hydraulic cylinder realizes the horizontal movement of the sliding gate mechanism slide plate by controlling the extension and retraction of the piston rod.

[0003] If the hydraulic cylinder hook is not protected or protected inadequately, the following problems will occur: First, during the steel-out process of the converter, the hook will stick to steel and slag, affecting the normal installation of the hydraulic cylinder of the sliding nozzle mechanism, resulting in increased job cleaning intensity and safety risks, leading to a tight production rhythm on site, and the risk of unplanned shutdown of the casting machine due to tight molten steel connection; Second, during the treatment of refined molten steel, improper operation will cause molten steel and slag to splash onto the hydraulic cylinder. If it is not inspected and discovered in time, it will cause the hydraulic cylinder to leak oil and burn, or even lead to direct scrapping, which will lead to the ladle sliding nozzle mechanism failing to open effectively during the casting preparation process of the casting machine, resulting in unplanned shutdown of the casting machine or the inability to effectively close the mechanism after opening, resulting in liquid metal leakage accidents, and at the same time, seriously affecting the safe and stable operation of the on-site ladle.

[0004] To ensure the safety of the hydraulic cylinder, some companies have operators hook the hydraulic cylinder on the ground after the steel bag is filled with molten steel (the so-called heavy bag hook cylinder), which poses a great safety risk. In order to prevent the hook from being damaged by collision or splashing of molten steel and slag, some companies weld simple steel plate structures on both sides of the hook, but the durability is not strong enough and the protection is not comprehensive enough.

[0005] According to the industry, there is currently no hydraulic cylinder and hook protection device with a perfect design and full functions. In order to ensure the safety of the hydraulic cylinder and hook of the sliding gate mechanism, to ensure smooth production and personnel safety, it is necessary to design a hydraulic cylinder and hook protection device that is simple to make and reliable. Summary of the invention

[0006] The utility model aims to solve the problems existing in the prior art and provide a hydraulic cylinder hook protection device for a ladle sliding nozzle mechanism which is simple in structure, convenient to manufacture, safe and reliable.

[0007] To this end, the utility model adopts the following technical solutions:

[0008] A hydraulic cylinder hook protection device for a ladle sliding water nozzle mechanism comprises a door frame buckled above the hydraulic cylinder hook, horizontally arranged support plates are fixed to the bottom ends of both sides of the door frame, the outer ends of the support plates are flush with the outer side surfaces of the door frame, the inner ends are fixed to the outer wall of the ladle and are perpendicular to the outer wall of the ladle, a vertical refractory brick fixing groove is formed between the side of the door frame and the support plate, vertical refractory bricks are placed in the vertical refractory brick fixing groove, and the top of the vertical refractory bricks are overlapped with horizontal refractory bricks; the contact surfaces between the vertical refractory bricks and the side of the door frame, the support plate, the outer wall of the ladle and the horizontal refractory bricks, as well as the contact surfaces between the horizontal refractory bricks and the top edge of the door frame and the outer wall of the ladle are coated with refractory putty; refractory bricks are provided above the door frame The clamping mechanism includes a spring cylinder made of a steel tube arranged vertically, the spring cylinder is fixed on the outer wall of the ladle, the top of the spring cylinder is closed, a pressure spring is arranged inside, a fork rod is sleeved inside the spring cylinder, the top of the fork rod abuts against the bottom of the pressure spring, and the bottom of the fork rod is connected to a refractory brick clamping frame composed of a door-shaped frame plate, the refractory brick clamping frame is adapted to the structure composed of the warehouse door frame and the support plate, the refractory brick clamping frame is covered on both sides of the vertical refractory brick under the action of the pressure spring, and the side plate of the refractory brick clamping frame is tightly fitted with the vertical refractory brick, and the top plate is tightly fitted with the horizontal refractory brick; the part of the fork rod located outside the spring cylinder is provided with a horizontal outward handle, and the handle can be pulled up to drive the refractory brick clamping frame to move upward. Furthermore, the inner edge of the side of the warehouse door frame is provided with an inward vertical baffle, and a vertical refractory brick fixing groove is formed between the side of the warehouse door frame, the vertical baffle and the support plate. Furthermore, a door plate is installed on the door frame, a hinge is provided on one side of the door frame, the door plate and the door frame are hinged to each other through the hinge, a first locking ring is provided on the side of the door frame corresponding to the free end of the door plate, and a second locking ring matching the first locking ring is provided on the side of the free end of the door plate. When the door plate is in a closed state, the first locking ring and the second locking ring are opposite to each other and are fixed to each other by a locking member.

[0009] The beneficial effects of the utility model are:

[0010] 1. Refractory bricks are used to fill the steel groove formed by the door frame and the support plate, which effectively protects the hook. At the same time, this design makes it easier to replace the refractory bricks when they are damaged;

[0011] 2. The refractory brick clamping mechanism is used to firmly press the refractory bricks into the steel groove formed by the door frame and the support plate. The refractory bricks are not easily touched and dropped, making the entire protection device stronger and more collision-resistant, and the protection more reliable;

[0012] 3. The protective device is easy to manufacture, has low processing costs, and is easy to operate and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the installation of the sliding gate mechanism of the utility model;

[0014] Figure 2 This is a schematic diagram of the structure of the hook protection device of the utility model (the door plate is not shown in the figure);

[0015] Figure 3 It is a rear schematic diagram of the door frame and support plate of the utility model;

[0016] Figure 4 It is a schematic diagram of the connection between the door frame and the door plate of the utility model.

[0017] In the figure, 1- ladle, 2- ladle sliding nozzle mechanism, 3- hydraulic cylinder, 4- hydraulic cylinder hook, 5- warehouse door frame, 5a- hinge, 5b- first locking ring, 5c- second locking ring, 6- support plate, 7- vertical baffle, 8- vertical refractory brick, 9- horizontal refractory brick, 10- spring tube, 11- pressure spring, 12- fork rod, 13- handle, 14- refractory brick fixing frame, 15- warehouse door plate, 16- vertical refractory brick fixing groove. DETAILED DESCRIPTION

[0018] The technical solution of the utility model is further described below in conjunction with the accompanying drawings.

[0019] like Figure 2-4 As shown, a hydraulic cylinder hook protection device for a ladle sliding water gate mechanism comprises a door frame 5 buckled above a hydraulic cylinder hook 4, horizontally arranged support plates 6 are respectively fixed to the bottom ends of both sides of the door frame 5, the outer ends of the support plates 6 are flush with the outer side surfaces of the door frame 5, the inner ends are welded and fixed to the outer wall of the ladle 1 and are perpendicular to the outer wall of the ladle 1, an inwardly facing vertical baffle plate 7 is provided on the inner edge of the side of the door frame 5, and a vertical refractory brick fixing groove 16 is formed between the side of the door frame 5, the vertical baffle plate 7 and the support plate 6; the door frame 5, the support plate 6 and the vertical baffle plate 7 are all made of steel plates.

[0020] A vertical refractory brick 8 is placed in the vertical refractory brick fixing groove 16, and a horizontal refractory brick 9 is overlapped on the top of the vertical refractory brick 8. The contact surfaces between the vertical refractory brick 8 and the side of the door frame 5, the support plate 6, the outer wall of the ladle 1 and the horizontal refractory brick 9, as well as the contact surfaces between the horizontal refractory brick 9 and the top edge of the door frame 5 and the outer wall of the ladle 1 are coated with refractory mortar, and fixation is achieved by the refractory mortar; a door plate 15 is installed on the door frame 5, and a hinge 5a is provided on one side of the door frame 5, and the door plate 15 and the door frame 5 are hinged to each other through the hinge 5a; a first locking ring 5b is provided on one side of the door frame 5 corresponding to the free end of the door plate 15, and a second locking ring 5c ​​matching the first locking ring 5b is provided on one side of the free end of the door plate 15. When the door plate 15 is closed, the first locking ring 5b and the second locking ring 5c ​​are opposite to each other and the first locking ring 5b and the second locking ring 5c ​​are wrapped and fixed by wire. The purpose of providing the door plate 15 is to further protect the hydraulic cylinder hook 4 and the hydraulic cylinder 3 in the door frame 5, so that the hydraulic cylinder hook 4 is closed on all sides except the bottom surface.

[0021] A refractory brick fixing mechanism is provided above the warehouse door frame 5, and the refractory brick fixing mechanism includes a vertically arranged spring tube 10 composed of a steel pipe. The spring tube 10 is welded to the outer wall of the ladle 1 by surfacing welding. The top end of the spring tube 10 is closed and a pressure spring 11 is provided inside. A fork rod 12 is sleeved inside the spring tube 10, and the top end of the fork rod 12 abuts against the bottom end of the pressure spring 11. The bottom end of the fork rod 12 is connected to a refractory brick fixing frame 14 composed of a door-shaped frame plate. The door-shaped frame plate is made of steel plate. The refractory brick fixing frame 14 is adapted to the structure composed of the warehouse door frame 5 and the support plate 6. The refractory brick fixing frame 14 is covered on both sides of the vertical refractory brick 8 under the action of the pressure spring 11. The side plates of the refractory brick fixing frame 14 are tightly fitted with the vertical refractory brick 8, and the top plate is tightly fitted with the horizontal refractory brick 9, so that the refractory bricks are not easy to fall and are more resistant to bumps. The part of the fork rod 12 located outside the spring tube 10 is provided with a horizontal handle 13 facing outward. Pulling the handle 13 upward can drive the refractory brick fixing frame 14 to move upward. After pulling the handle 13 upward, the refractory brick fixing mechanism can be separated from the refractory brick fixing groove 15 formed by the warehouse door frame 5 and the support plate 6, which is convenient for placing refractory bricks and applying refractory putty.

[0022] The process of installing and replacing refractory bricks in this utility model is as follows:

[0023] Step 1: Hold the handle 13 and lift the refractory brick fixing frame 14 upward to separate the refractory brick fixing frame 14 from the door frame 5. At this time, the pressure spring 11 is in a compressed state;

[0024] Step 2: Place the vertical refractory brick 8 in the vertical refractory brick fixing groove 16, overlap the horizontal refractory brick 9 on the top of the two vertical refractory bricks 8, and apply refractory mortar on the contact surfaces of the vertical refractory brick 8 and the horizontal refractory brick 9;

[0025] Step 3: Put down the handle, the refractory brick fixing frame 14 is pressed against the vertical refractory brick 8 and the horizontal refractory brick 9 under the elastic force of the pressure spring 11, thereby preventing the vertical refractory brick 8 and the horizontal refractory brick 9 from being knocked and falling during the operation of the ladle.

[0026] The hooking process of the hydraulic cylinder of the sliding water gate mechanism of the utility model is as follows:

[0027] Open the door plate 15, and hang the T-shaped part at the end of the cylinder body of the hydraulic cylinder 3 on the hydraulic cylinder hook 4. Then close the door plate 15, so that the second locking ring 5c ​​on the door plate 15 is opposite to the first locking ring 5b on the door frame 5, insert one end of the wire into the first locking ring 5b and the second locking ring 5c, and then wrap and fix it with the other end of the wire to lock the door plate 15. When the ladle 1 is running at ordinary times, it can effectively shield external impact damage. When the ladle 1 is tapping steel under the furnace, the molten steel and slag will splash on the protective device, thereby well protecting the hydraulic cylinder 3 and the hydraulic cylinder hook 4. In particular, the refractory brick clamping frame 14 composed of steel plates and the refractory bricks form two lines of protection, avoiding the refractory brick clamping frame 14 from being perforated when the molten steel and slag continue to erode, and failing to protect the hydraulic cylinder hook 4. The vertical refractory bricks 8 and the horizontal refractory bricks 9 are set, and effective protection can still be achieved after the refractory brick clamping frame 14 is perforated, thereby effectively improving the service life and reliability of the protective device.

Claims

1. A hydraulic cylinder hook protection device for a ladle sliding nozzle mechanism, characterized in that: It comprises a door frame (5) buckled above a hydraulic cylinder hook (4), the bottom ends of both sides of the door frame (5) are respectively fixed with horizontally arranged support plates (6), the outer ends of the support plates (6) are flush with the outer side surfaces of the door frame (5), the inner ends are fixed to the outer wall of the ladle (1) and are perpendicular to the outer wall of the ladle (1), a vertical refractory brick fixing groove (16) is formed between the side of the door frame (5) and the support plate (6), a vertical refractory brick (8) is placed in the vertical refractory brick fixing groove (16), and the top of the vertical refractory brick (8) is overlapped with a horizontal refractory brick (9); the contact surfaces between the vertical refractory brick (8) and the side of the door frame (5), the support plate (6), the outer wall of the ladle (1) and the horizontal refractory brick (9), and the contact surfaces between the horizontal refractory brick (9) and the top edge of the door frame (5) and the outer wall of the ladle (1) are coated with refractory cement; A refractory brick fixing mechanism is provided above the door frame (5), and the refractory brick fixing mechanism comprises a spring tube (10) vertically arranged and composed of a steel pipe, the spring tube (10) being fixed on the outer wall of the ladle (1), the top end of the spring tube (10) being closed, and a pressure spring (11) being provided inside, a fork rod (12) being sleeved inside the spring tube (10), the top end of the fork rod (12) being against the bottom end of the pressure spring (11), the bottom end of the fork rod (12) being connected to a refractory brick fixing frame (14) composed of a door-shaped frame plate, and the refractory The brick fixing frame (14) is adapted to the structure formed by the door frame (5) and the support plate (6); the refractory brick fixing frame (14) is covered on both sides of the vertical refractory brick (8) under the action of the pressure spring (11); the side plates of the refractory brick fixing frame (14) are closely fitted with the vertical refractory brick (8), and the top plate is closely fitted with the horizontal refractory brick (9); the part of the fork rod (12) located outside the spring tube (10) is provided with a horizontal handle (13) facing outwards, and the refractory brick fixing frame (14) can be driven to move upward by pulling the handle (13) upwards.

2. A hydraulic cylinder hook protection device for a ladle sliding nozzle mechanism according to claim 1, characterized in that: An inwardly facing vertical baffle plate (7) is provided on the inner edge of the side of the door frame (5), and a vertical refractory brick fixing groove (16) is formed between the side of the door frame (5), the vertical baffle plate (7) and the support plate (6).

3. The hydraulic cylinder hook protection device for the ladle sliding nozzle mechanism according to claim 1 is characterized in that: A door plate (15) is mounted on the door frame (5), a hinge (5a) is provided on one side of the door frame (5), the door plate (15) and the door frame (5) are hinged to each other via the hinge (5a), a first locking ring (5b) is provided on one side of the door frame (5) corresponding to the free end of the door plate (15), and a second locking ring (5c) matching the first locking ring (5b) is provided on one side of the free end of the door plate (15), and when the door plate (15) is in a closed state, the first locking ring (5b) and the second locking ring (5c) are opposite to each other and are fixed to each other via a locking member.

4. A ladle sliding nozzle mechanism hydraulic cylinder hook protection device according to claim 3, characterized in that: The locking member is a tying wire, and the tying wire wraps and fixes the first locking ring (5b) and the second locking ring (5c).

5. The hydraulic cylinder hook protection device for a ladle sliding nozzle mechanism according to claim 1, characterized in that: The spring tube (10) is welded to the outer wall of the ladle (1).