阅读说明：本技术 一种钢包滑动水口油缸及钢包水口控制装置 (Steel ladle sliding nozzle oil cylinder and steel ladle nozzle control device ) 是由 杨高瞻 胡泽东 杨凡 张立君 焦占印 赵贝贝 贺玉军 刘海燕 张玉海 于 2021-06-17 设计创作，主要内容包括：本发明公开了一种钢包滑动水口油缸,包括彼此同轴的缸筒、活塞、活塞杆和柱塞,所述缸筒的前端和后端分别由前端盖和后盖封堵,所述活塞和柱塞与缸筒的内壁滑动连接,活塞与前端盖之间形成前腔,活塞与柱塞之间形成中腔,柱塞与后盖之间形成后腔,所述活塞杆的前端与钢包水口机构相连接,后端穿过前端盖的中心孔并与活塞连接,在缸筒的侧壁上设有分别与前腔、中腔和后腔相对应的前腔油口、中腔油口和后腔油口。本发明同时还给出了钢包水口控制装置。本发明采用活塞驱动和柱塞驱动兼备的复合油缸,在活塞出现内泄时,可以及时采用柱塞驱动活塞杆,使钢包水口可靠关闭,防止钢包水口无法关闭而引发生产事故,确保设备和现场工作人员的安全。(The invention discloses a steel ladle sliding gate oil cylinder which comprises a cylinder barrel, a piston rod and a plunger which are coaxial with each other, wherein the front end and the rear end of the cylinder barrel are respectively blocked by a front end cover and a rear cover, the piston and the plunger are in sliding connection with the inner wall of the cylinder barrel, a front cavity is formed between the piston and the front end cover, a middle cavity is formed between the piston and the plunger, a rear cavity is formed between the plunger and the rear cover, the front end of the piston rod is connected with a steel ladle gate mechanism, the rear end of the piston rod penetrates through a central hole of the front end cover and is connected with the piston, and a front cavity oil port, a middle cavity oil port and a rear cavity oil port which respectively correspond to the front cavity, the middle cavity and the rear cavity are arranged on the side wall of the cylinder barrel. The invention also provides a ladle nozzle control device. The invention adopts the composite oil cylinder with both piston drive and plunger drive, and can drive the piston rod in time by the plunger when the piston leaks internally, so that the ladle nozzle is reliably closed, production accidents caused by the fact that the ladle nozzle cannot be closed are prevented, and the safety of equipment and field workers is ensured.)

1. The ladle sliding gate oil cylinder is characterized by comprising a cylinder barrel (9), a piston (16), a piston rod (17) and a plunger (7) which are coaxial with each other, wherein the front end and the rear end of the cylinder barrel (9) are respectively sealed by a front end cover (1) and a rear end cover (19), the piston (16) and the plunger (7) are positioned inside the cylinder barrel (9) and are in sliding connection with the inner wall of the cylinder barrel (9), a front cavity (4) is formed between the piston (16) and the front end cover (1), a middle cavity (14) is formed between the piston (16) and the plunger (7), a rear cavity (8) is formed between the plunger (7) and the rear end cover (19), the front end of the piston rod (17) is connected with a ladle gate mechanism, the rear end penetrates through a central hole of the front end cover (1) and is fixedly connected with the piston (16), and a front cavity (oil port (3) corresponding to the front cavity (4), the middle cavity (14) and the rear cavity (8) is arranged on the side wall of the cylinder barrel (9), A middle cavity oil port (6) and a rear cavity oil port 10.

2. The ladle sliding gate nozzle oil cylinder according to claim 1, wherein a piston shaft sleeve (15) is arranged between the piston (16) and the plunger (7), the piston shaft sleeve (15) is fixedly connected with the piston (16), and the diameter of the piston shaft sleeve (15) is smaller than the inner diameter of the cylinder barrel (9).

3. The ladle sliding gate nozzle oil cylinder according to claim 1 or 2, wherein the middle of one side of the plunger (7) close to the rear cover (19) is provided with a column shaft (25).

4. The ladle sliding gate nozzle oil cylinder according to claim 3, characterized in that a piston rod guide sleeve (2) is arranged on the inner side of the front end cover (1) of the cylinder barrel (9).

5. The ladle slide gate nozzle oil cylinder according to claim 4, wherein a piston rod guide sleeve seal (18) is arranged between the piston rod guide sleeve (2) and the cylinder barrel (9).

6. The ladle sliding gate nozzle oil cylinder according to claim 5, characterized in that a plunger guide sleeve (12) is arranged between the plunger (7) and the cylinder barrel (9).

7. The ladle sliding gate nozzle oil cylinder according to claim 6, characterized in that a cylinder and guide sleeve space seal (11) is arranged between the plunger guide sleeve (12) and the cylinder (9), and a plunger and guide sleeve space seal (13) is arranged between the plunger guide sleeve (12) and the plunger (7).

8. A ladle nozzle control device using the ladle sliding nozzle oil cylinder of any one of claims 1, 2, 4-7, characterized by comprising the ladle sliding nozzle oil cylinder (20), a main reversing valve (24), an emergency reversing valve (21), a first high-pressure ball valve (27) and a second high-pressure ball valve (28), wherein a front cavity oil port (3) and a middle cavity oil port (6) of the ladle sliding nozzle oil cylinder (20) are respectively connected with an oil return pipeline of a hydraulic system through the first high-pressure ball valve (27) and the second high-pressure ball valve (28), a port P and a port T of the main reversing valve (24) are respectively connected with a pressure oil pipe and an oil return pipeline of the hydraulic system, a port A and a port B of the main reversing valve (24) are respectively connected with the front cavity oil port (3) and the middle cavity oil port (6) of the ladle sliding nozzle oil cylinder (20), the port P and the port T of the emergency reversing valve (21) are respectively connected with the pressure oil return pipeline and the oil return pipeline of the hydraulic system, the port B of the emergency reversing valve (21) is connected with a rear cavity oil port (10) of a ladle sliding nozzle oil cylinder (20).

9. The ladle nozzle control device according to claim 8, wherein a one-way throttle valve (22) and a hydraulic control one-way valve (23) are arranged on a hydraulic pipeline between the port A and the port B of the main reversing valve (24) and the front cavity oil port (3) and the middle cavity oil port (6) of the ladle sliding nozzle oil cylinder (20).

10. The ladle nozzle control device according to claim 9, wherein the emergency change valve (21), the one-way throttle valve (22), the hydraulic control one-way valve (23) and the main change valve (24) are all mounted on a manifold block (26).

Technical Field

The invention relates to an oil cylinder capable of closing a ladle nozzle under the condition of internal leakage and a ladle nozzle control device using the oil cylinder, belonging to the technical field of metallurgical equipment.

Background

The ladle sliding gate control device is important equipment for continuous casting production in a steel plant, the opening of a ladle gate is originally completed by driving a sliding gate mechanism part by a pressing rod, and the ladle sliding gate is gradually driven by an oil cylinder along with the improvement of the automation degree of the equipment, so that the labor productivity is improved, and the labor intensity of workers is reduced. However, at present, no oil cylinder specially used for opening the ladle sliding nozzle exists, and the ladle sliding nozzle is driven by a common oil cylinder, so that the defect that the ladle sliding nozzle cannot normally work after the oil cylinder leaks internally, the ladle nozzle cannot be opened or closed, the continuous casting equipment is burnt by a light person and the field worker is burnt by a heavy person, and thus, a major production accident is caused. Therefore, it is necessary to develop a cylinder capable of closing the ladle nozzle under the condition of internal leakage and a ladle nozzle control device using the cylinder.

Disclosure of Invention

The invention aims to provide a ladle sliding nozzle oil cylinder aiming at the defects of the prior art, so that serious production accidents caused by the fact that a ladle nozzle cannot be closed after the inside of the oil cylinder is drained are prevented, and the safety of continuous casting equipment and field workers is ensured. The invention also provides a ladle nozzle control device using the oil cylinder.

In order to achieve the purpose, the invention adopts the following technical scheme:

the front end and the rear end of the cylinder barrel are respectively sealed and blocked by a front end cover and a rear end cover, the piston and the plunger are located inside the cylinder barrel and are in sliding connection with the inner wall of the cylinder barrel, a front cavity is formed between the piston and the front end cover, a middle cavity is formed between the piston and the plunger, a rear cavity is formed between the plunger and the rear cover, the front end of the piston rod is connected with a ladle water gap mechanism, the rear end of the piston rod penetrates through a center hole of the front end cover and is fixedly connected with the piston, and a front cavity oil port, a middle cavity oil port and a rear cavity oil port which correspond to the front cavity, the middle cavity and the rear cavity respectively are arranged on the side wall of the cylinder barrel.

According to the ladle sliding gate oil cylinder, the piston shaft sleeve is arranged between the piston and the plunger, the piston shaft sleeve is fixedly connected with the piston, and the diameter of the piston shaft sleeve is smaller than the inner diameter of the cylinder barrel.

In the ladle sliding nozzle oil cylinder, the middle part of one side of the plunger close to the rear cover is provided with the column shaft.

In the ladle sliding gate oil cylinder, the column shaft and the plunger are integrated.

In the ladle sliding gate oil cylinder, the inner side of the front end cover of the cylinder barrel is provided with the piston rod guide sleeve.

According to the ladle sliding gate oil cylinder, the piston rod guide sleeve is arranged between the piston rod guide sleeve and the cylinder barrel for sealing.

And a plunger guide sleeve is arranged between the plunger and the cylinder barrel.

According to the ladle sliding gate oil cylinder, the cylinder barrel and the guide sleeve are arranged between the plunger guide sleeve and the cylinder barrel in a sealing mode, and the plunger and the guide sleeve are arranged between the plunger guide sleeve and the plunger in a sealing mode.

The ladle nozzle control device comprises a ladle sliding nozzle oil cylinder, a main reversing valve, an emergency reversing valve, a first high-pressure ball valve and a second high-pressure ball valve, wherein a front cavity oil port and a middle cavity oil port of the ladle sliding nozzle oil cylinder are respectively connected with an oil return pipeline of a hydraulic system through the first high-pressure ball valve and the second high-pressure ball valve, a P port and a T port of the main reversing valve are respectively connected with a pressure oil pipe and an oil return pipeline of the hydraulic system, an A port and a B port of the main reversing valve are respectively connected with the front cavity oil port and the middle cavity oil port of the ladle sliding nozzle oil cylinder, the P port and the T port of the emergency reversing valve are respectively connected with the pressure oil pipe and the oil return pipeline of the hydraulic system, and a B port of the emergency reversing valve is connected with the back cavity oil port of the ladle sliding nozzle oil cylinder.

According to the ladle nozzle control device, the one-way throttle valve and the liquid control one-way valve are arranged on the hydraulic pipeline between the port A and the port B of the main reversing valve and the front cavity oil port and the middle cavity oil port of the ladle sliding nozzle oil cylinder.

In the ladle nozzle control device, the emergency reversing valve, the one-way throttle valve, the hydraulic control one-way valve and the main reversing valve are all arranged on the integrated block.

The invention adopts the composite oil cylinder with both piston drive and plunger drive, and can drive the piston rod by the plunger in time when the piston has internal leakage, so that the ladle nozzle is reliably closed, the accident potential is eliminated, and the serious production accident caused by the fact that the ladle nozzle cannot be closed is prevented, thereby ensuring the safety of continuous casting equipment and field workers.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

FIG. 1 is a schematic structural view of a ladle sliding gate oil cylinder according to the present invention;

fig. 2 is a hydraulic schematic diagram of the ladle sliding gate nozzle control device of the present invention.

The reference numbers in the figures are as follows: 1. the hydraulic control type hydraulic control hydraulic.

Detailed Description

The invention provides a ladle sliding nozzle oil cylinder and a ladle nozzle control device, which can reliably close a ladle sliding nozzle when the inside of the ladle sliding nozzle oil cylinder leaks, prevent continuous casting equipment and field workers from being burnt, and improve the stability, reliability and safety of the continuous casting equipment in a steel plant.

Referring to fig. 1 and 2, the ladle sliding gate valve controlling device of the present invention includes a ladle sliding gate valve cylinder 20, an emergency directional valve 21, a check throttle valve 22, a hydraulic control check valve 23, a main directional valve 24, a manifold block 26, a first high pressure ball valve 27, and a second high pressure ball valve 28.

The ladle sliding gate nozzle oil cylinder 20 mainly comprises a front end cover 1, a piston rod guide sleeve 2, a front cavity oil port 3, a front cavity 4, a piston seal 5, a middle cavity oil port 6, a plunger 7, a rear cavity 8, a cylinder barrel 9, a rear cavity oil port 10, a cylinder barrel and guide sleeve space seal 11, a plunger guide sleeve 12, a plunger and guide sleeve space seal 13, a middle cavity 14, a piston shaft sleeve 15, a piston 16, a piston rod 17, a piston rod guide sleeve seal 18, a rear cover 19 and a column shaft 25.

The cylinder body of the ladle sliding gate oil cylinder 20 is composed of a front end cover 1, a cylinder barrel 9 and a rear cover 19, a front cavity oil port 3, a middle cavity oil port 6 and a rear cavity oil port 10 are designed on the cylinder barrel 9, a piston 16, a piston rod 17 and a plunger 7 are arranged inside the cylinder body, a piston rod guide sleeve 2 is installed inside the cylinder body close to the front end cover 1, the piston 16 is installed on the piston rod 17, the plunger 7 is arranged at the rear end of the piston rod 17, a piston shaft sleeve 15 is installed between the piston 16 and the plunger 7, a column shaft 25 is designed at the position of the plunger 7 close to the rear cover 19 and used for quickly starting the plunger 7, the column shaft 25 on the plunger 7 is processed together when the plunger 7 is processed, and the tail end of the piston shaft sleeve 15 on the piston rod 17 is not mechanically connected with the left end face of the plunger 7. A plunger guide sleeve 12 is arranged between the plunger 7 and the cylinder 9, a cylinder and guide sleeve room seal 11 is arranged between the plunger guide sleeve 12 and the cylinder 9, a plunger and guide sleeve room seal 13 is arranged between the plunger guide sleeve 12 and the plunger 7, a piston rod guide sleeve seal 18 is arranged between the piston rod guide sleeve 2 and the cylinder 9, three cavities are enclosed by the front end cover 1, the piston rod guide sleeve 2, the piston 16, the plunger 7, the rear cover 19 and the cylinder 9, a front cavity 4 is enclosed by the front end cover 1, the piston rod guide sleeve 2, the piston 16 and the cylinder 9, a middle cavity 14 is enclosed by the piston 16, the plunger 7 and the cylinder 9, a rear cavity 8 is enclosed by the plunger 7, the rear cover 19 and the cylinder 9, a front cavity oil port 3 is connected with the front cavity 4, a middle cavity oil port 6 is connected with the middle cavity 14, and a rear cavity 10 is connected with the rear cavity 8.

The emergency reversing valve 21, the one-way throttle valve 22, the hydraulic control one-way valve 23 and the main reversing valve 24 are all installed on the manifold block 26, an P, T port of the main reversing valve 24 is connected with a pressure oil pipe and an oil return pipeline of a hydraulic system through the manifold block 26, a A, B port of the main reversing valve 24 is connected with the hydraulic control one-way valve 23 and the one-way throttle valve 22 and is respectively connected with a front cavity oil port 3 and a middle cavity oil port 6 of the ladle sliding water gap oil cylinder 20 through hydraulic pipelines, a P, T port of the emergency reversing valve 21 is connected with the pressure oil pipe and the oil return pipeline of the hydraulic system through the manifold block 26, and a B port of the emergency reversing valve 21 is connected with a rear cavity oil port 10 through the hydraulic pipelines. The front cavity oil port 3 and the middle cavity oil port 6 of the ladle sliding nozzle oil cylinder 20 are respectively connected with an oil return pipeline of a hydraulic system through a first high-pressure ball valve 27 and a second high-pressure ball valve 28.

The installation and working process of the invention is as follows:

1. the ladle is provided with a ladle sliding nozzle oil cylinder 20

The electromagnets 3DT and 4DT of the emergency reversing valve 21 lose power, the electromagnet 1DT of the main reversing valve 24 loses power, the electromagnet 2DT gets power, the pressure oil enters the middle cavity 14 from the middle cavity oil port 6 of the ladle sliding nozzle oil cylinder 20 through the main reversing valve 24, the hydraulic control one-way valve 23 and the one-way throttle valve 22 to push the piston 16 to move (extend) leftwards, and the hydraulic oil in the front cavity 4 flows back to the oil return pipeline of the hydraulic system through the front cavity oil port 3, the one-way throttle valve 22, the hydraulic control one-way valve 23 and the main reversing valve 24. When the piston 16 moves to the leftmost end, the electromagnet 1DT of the main reversing valve 24 loses power, and the electromagnet 2DT loses power, so that the piston rod 17 of the ladle sliding nozzle oil cylinder 20 is connected with the ladle nozzle mechanism. At this time, the ladle sliding nozzle oil cylinder 20 on the ladle is installed.

2. Pouring operation

A post operator starts a casting starting button, electromagnets 3DT and 4DT of an emergency reversing valve 21 lose power, an electromagnet 1DT of a main reversing valve 24 is electrified, a electromagnet 2DT loses power, pressure oil enters a front cavity 4 from a front cavity oil port 3 of a ladle sliding nozzle oil cylinder 20 through the main reversing valve 24, a hydraulic control one-way valve 23 and a one-way throttle valve 22 and pushes a piston 16 to move rightwards (retract), meanwhile, hydraulic oil of a middle cavity 14 flows back to an oil return pipeline of a hydraulic system through the middle cavity oil port 6, the one-way throttle valve 22, the hydraulic control one-way valve 23 and the main reversing valve 24, and when the piston 16 reaches a specified position, namely, the opening degree of a nozzle of a ladle sliding nozzle mechanism is reached, and the sliding nozzle mechanism performs casting. At the moment, the electromagnet 1DT of the main reversing valve 24 loses power, the electromagnet 2DT loses power, when the molten steel of the steel ladle is poured, a post operator operates a closing button, the electromagnet 1DT of the main reversing valve 24 loses power, the electromagnet 2DT gets power, pressure oil enters the middle cavity 14 from the middle cavity oil port 6 of the steel ladle sliding water gap oil cylinder 20 through the main reversing valve 24, the hydraulic control one-way valve 23 and the one-way throttle valve 22 and pushes the piston 16 to move leftwards, and meanwhile, hydraulic oil in the front cavity 4 flows back to an oil return pipeline of the hydraulic system from the front cavity oil port 3, the one-way throttle valve 22, the hydraulic control one-way valve 23 and the main reversing valve 24.

When the piston 16 moves to the leftmost end, the sliding gate valve is finally closed, and at the moment, the electromagnet 1DT of the main reversing valve 24 is de-energized, and the electromagnet 2DT is de-energized.

3. Operation of ladle sliding gate oil cylinder piston in internal leakage fault

In the pouring process of a ladle on a continuous casting machine, when the piston 16 of the ladle sliding nozzle oil cylinder leaks and the post operator operates the closing button to be ineffective, the post operator operates the emergency closing button and simultaneously opens the first high-pressure ball valve 27 and the second high-pressure ball valve 28. The electromagnet 1DT of the main reversing valve 24 loses power, the electromagnet 2DT loses power, the electromagnet 3DT of the emergency reversing valve 21 loses power, the electromagnet 4DT gets power, the pressure oil directly enters the rear cavity 8 of the ladle sliding gate oil cylinder 20 to push the plunger 7, the piston 16 and the piston rod 17 to move leftwards, and meanwhile, the hydraulic oil in the front cavity 4 and the middle cavity 14 of the ladle sliding gate oil cylinder 20 enters an oil return pipeline of a hydraulic system through the front cavity oil port 3, the first high-pressure ball valve 27, the hydraulic pipeline and the middle cavity oil port 6, the second high-pressure ball valve 28 and the hydraulic pipeline. The plunger 7 is pushed to the leftmost end to finally close the ladle sliding nozzle. After the ladle sliding water gap is closed, the electromagnets 3DT and 4DT of the emergency reversing valve 21 lose power. The ladle turret rotates to the right position, and the ladle sliding nozzle oil cylinder 20 is replaced.

The invention adopts the composite oil cylinder with both piston drive and plunger drive, and the plunger drive is adopted in time to close the ladle nozzle when the piston cylinder has internal leakage, thereby avoiding major equipment accidents and casualties in the production process of a continuous casting machine.

Specification and model of hydraulic elements:

ladle slide gate nozzle hydro-cylinder 20: d =100mm D =75mm H =300mm

The emergency reversing valve 21: DG4V-5-6CJ-VM-U-H6-20

One-way throttle valve 22: DGMFN-5-Y-A2W-B2W-30

Liquid control check valve 23: DGMPC-5-ABK-BAK-30

Main directional control valve 24: DG4V-5-6CJ-VM-U-H6-20

The integrated block 26: 200 x 400

First high-pressure ball valve 27: KHP-10-PN315

Second high-pressure ball valve 28: KHP-10-PN 315.