Emergency control device and method for locking air cylinder of ladle turret

Abstract

The invention discloses an emergency control device and method for a locking air cylinder of a ladle turret, and belongs to the technical field of ladle turrets.The emergency control device comprises a first tee joint and a ball valve, the first tee joint and the ball valve are arranged on a ventilation connector of an upper cavity of the locking air cylinder, and a main opening of the first tee joint is connected with the ventilation connector of the upper cavity of the locking air cylinder; a branch port of the first tee joint is connected with a first ball valve, and a port of the first tee joint is connected with an upper cavity ventilation pipeline; the second tee joint and the ball valve are arranged on a lower cavity ventilation connector of the locking air cylinder, a main opening of the second tee joint is connected with the lower cavity ventilation connector, a branch opening of the second tee joint is connected with the second ball valve, and a port of the second tee joint is connected with the third ball valve; the other end of the third ball valve is connected with a lower cavity ventilation pipeline; the technical problem that in the prior art, in the actual operation process of a continuous casting machine molten steel tank rotary table, due to the fact that two ventilation pipelines of an upper cavity and a lower cavity of a locking air cylinder break down, the position of the locking air cylinder cannot be locked or the locking air cylinder cannot rotate due to locking is mainly solved.

Description

Technical Field

[0001] The invention belongs to the technical field of molten steel ladle turntables, and in particular relates to an emergency control device and method for a locking cylinder of a molten steel ladle turntable. Background Art

[0002] The turret of the molten steel ladle is a key equipment in the production process of the continuous casting machine. Its design requires that it can achieve smooth 360-degree rotation in all directions. The locking cylinder installed on the base of the turret controls its movement through two ventilation pipes in the upper and lower chambers. When the lower chamber of the cylinder is inflated, it can push the swinging wedge into the socket, thereby locking the position of the swivel support table; when the upper chamber of the cylinder is inflated, the swinging wedge is pulled back to complete the position release of the swivel support table. This cyclic action ensures that the motor can smoothly drive the turret to rotate to the preset position and accurately stop it for casting operations.

[0003] In the design of the control system of the locking cylinder, a variety of control methods are adopted. The operator can perform manual operation in the large package operation room or at the valve station next to the machine. At the same time, the system is also equipped with an encoder, and the automatic control function is realized through the signal sent by the encoder. The entire control system is controlled by the main valve to control the air source supply, the solenoid valve performs specific control actions, the encoder provides position signals, and each component is connected into a complete control system through pipelines and lines.

[0004] However, since the continuous casting machine was put into production, various faults have often occurred during on-site operations. These faults mainly include: the main valve controlling the air source fails, resulting in interruption of air supply, the solenoid valve that executes the control command fails, the encoder that provides the position signal is abnormal, the pipeline that transports compressed air is damaged and leaks, and the line that transmits the control signal is disconnected or short-circuited. These faults will cause the cylinder to fail to operate normally, which will lead to a series of serious problems such as the swing wedge getting stuck, unable to lock the position or locked and unable to rotate, which not only affects normal production operations, but also may bring major safety hazards.

[0005] In order to solve these major hidden dangers during on-site operations, avoid major accidents, and ensure the smooth operation of the continuous casting machine, a reliable emergency control device is indeed needed. This device can provide a backup control method for operating the lock pin release and locking when the conventional control system fails, thereby solving this major problem. This can not only ensure the safe operation of the equipment, but also ensure the continuity and stability of production. By adding this emergency control device, when the original control system fails, the locking cylinder can still be effectively controlled, avoiding production interruptions and safety accidents caused by equipment failures. Summary of the invention

[0006] The purpose of the present invention is to provide an emergency control device and method for the locking cylinder of a molten steel ladle turntable, so as to solve the technical problem proposed in the above background technology that the locking cylinder cannot be locked in position or is locked and cannot rotate due to failure of the two ventilation pipes in the upper chamber and the lower chamber of the locking cylinder.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] An emergency control device for locking cylinder of a steel ladle turntable, comprising:

[0009] A No. 1 three-way and a ball valve are arranged on the ventilation interface of the upper chamber of the locking cylinder, the main port of the No. 1 three-way is connected to the ventilation interface of the upper chamber of the locking cylinder, the branch port of the No. 1 three-way is connected to the No. 1 ball valve, and the port of the No. 1 three-way is connected to the ventilation pipeline of the upper chamber;

[0010] A No. 2 tee and a ball valve are arranged on the ventilation interface of the lower chamber of the locking cylinder, the main port of the No. 2 tee is connected to the ventilation interface of the lower chamber, the branch port of the No. 2 tee is connected to the No. 2 ball valve, and the port of the No. 2 tee is connected to the No. 3 ball valve; the other end of the No. 3 ball valve is connected to the ventilation pipeline of the lower chamber.

[0011] Preferably, the No. 1 tee and the No. 2 tee are DN20 stainless steel tees, which are resistant to high pressure and can maintain stable performance within a large temperature variation range.

[0012] Preferably, the No. 1 ball valve, the No. 2 ball valve and the No. 3 ball valve are all DN20 high-pressure ball valves, which can achieve rapid pressure relief and inflation.

[0013] Preferably, the branch port of the No. 1 tee, the branch port of the No. 2 tee and the port are respectively connected to the No. 1 ball valve, the No. 2 ball valve and the No. 3 ball valve through internal and external threaded joints.

[0014] Preferably, under normal production conditions, the No. 1 ball valve is in a closed state; the No. 2 ball valve is in a closed state, and the No. 3 ball valve is in an open state.

[0015] An emergency control method for a locking cylinder of a molten steel ladle turntable, comprising:

[0016] When the cylinder upper chamber ventilation pipeline cannot exhaust air and the cylinder rod cannot be extended, open the No. 1 ball valve to exhaust air and relieve the pressure in the cylinder upper chamber;

[0017] When the ventilation pipeline of the lower chamber of the cylinder cannot exhaust air and the cylinder rod cannot be retracted, close the No. 3 ball valve to cut off the air source; open the No. 2 ball valve to exhaust air and relieve the pressure in the lower chamber of the cylinder.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The invention mainly solves the technical problem that during the actual operation of the continuous casting machine molten steel ladle turntable, the locking cylinder cannot lock its position or is locked and cannot rotate due to failure of the two ventilation pipelines in the upper and lower chambers of the locking cylinder.

[0020] Specifically, this application solves two specific problems through the following technical means:

[0021] To solve the problem that the ventilation pipeline of the upper chamber of the cylinder cannot be exhausted: add a three-way and a high-pressure ball valve to the pipeline of the upper chamber of the cylinder. When a fault occurs, the pressure of the upper chamber of the cylinder can be relieved by opening the ball valve to ensure that the cylinder rod can be extended normally and the position of the slewing support table can be locked. To solve the problem that the ventilation pipeline of the lower chamber of the cylinder cannot be exhausted: add a three-way and two high-pressure ball valves to the pipeline of the lower chamber of the cylinder. When a fault occurs, the pressure of the lower chamber of the cylinder can be relieved by closing one ball valve to cut off the air source and opening the other ball valve to ensure that the cylinder rod can be retracted normally and the position of the slewing support table can be released.

[0022] The present invention is not only simple in design and easy to operate, but also provides reliable guarantee for the safe operation of the continuous casting machine. In an emergency situation where automatic control and conventional manual operation fail, the control of the turntable can be quickly realized, effectively avoiding the occurrence of major accidents. At the same time, the solution also saves valuable time for equipment maintenance, improves production efficiency, reduces equipment maintenance costs, and has significant economic and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic structural diagram of a preferred embodiment of the present invention.

[0024] In the figure: 1. No. 1 three-way valve; 2. No. 1 ball valve; 3. No. 2 three-way valve; 4. No. 3 ball valve; 5. No. 2 ball valve; 6. Upper cavity ventilation pipeline; 7. Lower cavity ventilation pipeline. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. All other embodiments obtained by ordinary technicians in the field without making creative work based on the embodiments of the present invention shall fall within the scope of protection of the present invention.

[0026] like Figure 1 As shown:

[0027] First preferred embodiment:

[0028] In the prior art, the upper and lower venting interfaces on the locking cylinder are directly connected to the upper and lower venting pipelines 6 and 7, respectively, forming a simple pneumatic control circuit. The original locking cylinder has two typical fault states during operation, which can lead to serious safety hazards:

[0029] The first fault state is that the locking cylinder cannot complete the locking action. Specifically, when the upper chamber ventilation line 6 fails and cannot be exhausted normally, the air pressure inside the upper chamber will be held back. In this case, even if the lower chamber ventilation line 7 tries to deliver compressed air, the cylinder piston cannot move upward because the upper chamber air pressure cannot be released. This causes the cylinder rod to be unable to extend normally, unable to push the swing wedge into the socket, and ultimately causes the slewing support table to be unable to complete position locking.

[0030] The second fault state is that the cylinder cannot complete the release action. When the lower chamber ventilation pipeline 7 fails and cannot be exhausted normally, the compressed air in the lower chamber cannot be discharged normally, and the upper chamber cannot get the required compressed air supply. In this case, the high-pressure gas in the lower chamber forms an air lock state, and the upper chamber cannot obtain sufficient air pressure to overcome this air lock, which eventually causes the cylinder piston to be stuck in place and unable to move. As a result, the cylinder rod remains in the extended state, the swing wedge is always inserted in the socket, and the slewing support table is in a forced locked state. Since the lock cannot be released, the molten steel ladle turret will completely lose its ability to rotate.

[0031] Both of these fault conditions will result in serious consequences such as the cylinder not moving and the swing wedge being stuck. Whether it is unable to lock the position or locked and unable to rotate, it will bring major hidden dangers to the safe operation of the continuous casting machine. Once such a fault occurs during the production process, it will not only cause production interruption, but also may cause serious safety accidents. These potential dangers fully expose the design deficiencies of the original system, and a reliable emergency control solution is urgently needed to solve these problems.

[0032] Through the analysis of two typical fault states of the original system, it can be seen that the key to solving the fault state is indeed the pressure relief problem of the upper and lower chambers of the cylinder. Therefore, the following technical solutions are obtained:

[0033] An emergency control device for locking cylinder of a steel ladle turntable, comprising:

[0034] A No. 1 tee 1 and a ball valve are arranged on the ventilation interface of the upper chamber of the locking cylinder, the main port of the No. 1 tee 1 is connected to the ventilation interface of the upper chamber of the locking cylinder, the branch port of the No. 1 tee 1 is connected to the No. 1 ball valve 2, and the port of the No. 1 tee 1 is connected to the upper chamber ventilation pipeline 6;

[0035] A No. 2 tee 3 and a ball valve are arranged on the ventilation interface of the lower chamber of the locking cylinder, the main port of the No. 2 tee 3 is connected to the ventilation interface of the lower chamber, the branch port of the No. 2 tee 3 is connected to the No. 2 ball valve 5, and the port of the No. 2 tee 3 is connected to the No. 3 ball valve 4; the other end of the No. 3 ball valve 4 is connected to the lower chamber ventilation pipeline 7.

[0036] The No. 1 tee 1 is directly connected to the upper chamber of the cylinder through the main port. The port remains connected to the original ventilation pipeline to ensure normal operation, and the No. 1 ball valve 2 connected to the branch port provides an emergency pressure relief channel. When air lock occurs in the upper chamber, just open the No. 1 ball valve 2 to quickly release the pressure in the upper chamber. The No. 2 tee 3 cooperates with the No. 2 ball valve 5 and the No. 3 ball valve 4 to form a more complete control solution. The No. 2 tee 3 is connected to the lower chamber of the cylinder through the main port, and the No. 2 ball valve 5 connected to the branch port also provides an emergency pressure relief function. The design that the port is connected to the original ventilation pipeline through the No. 3 ball valve 4 realizes dual control of the lower chamber gas path. This design can not only solve the problem of gas lock in the lower chamber, but also cut off the original gas path through the No. 3 ball valve 4 to prevent the faulty system from interfering with emergency operations.

[0037] Specifically,

[0038] The No. 1 tee 1 and the No. 2 tee 3 are DN20 stainless steel tees; the nominal diameter of the tee is 20 mm, which ensures sufficient ventilation cross-sectional area to meet the gas flow requirements of the cylinder during emergency operation; in actual application environments, stainless steel tees show strong adaptability. It can maintain stable performance within a large temperature range, has excellent high pressure resistance, and can operate reliably even in harsh industrial environments. In addition, the smooth surface of stainless steel is not easy to adhere to impurities, is easy to clean and maintain, and does not require additional anti-corrosion treatment. These characteristics greatly reduce the workload and cost of daily maintenance.

[0039] The No. 1 ball valve 2, No. 2 ball valve 5 and No. 3 ball valve 4 are all DN20 high-pressure ball valves; the specification of the nominal diameter of 20 mm is selected to match the diameter of the three-way pipe, which can ensure the smooth flow of gas in the pipeline and avoid local resistance caused by cross-sectional changes, thereby improving the overall working efficiency of the system; the ball valve has a simple structure and is easy to maintain. It can be fully opened and closed by turning the handle 90 degrees, and the operation is intuitive and fast. This feature is particularly important in emergency situations and can help operators complete control actions quickly and accurately. At the same time, the full-diameter characteristics of the ball valve ensure the maximum flow capacity, which is crucial for achieving rapid pressure relief and inflation; the high-pressure ball valve has excellent sealing performance and can maintain a reliable sealing effect under the maximum working pressure of the system, effectively preventing compressed air leakage. At the same time, its structural design ensures operational reliability under high-pressure environments, and the opening and closing actions are crisp and neat, avoiding safety hazards caused by inadequate opening and closing. At the same time, the three ball valves adopt a unified specification design concept, which means that spare parts can be shared, simplifying spare parts management and reducing spare parts inventory costs; maintenance personnel only need to master the maintenance skills of valves of one specification, which improves maintenance efficiency and reduces the risk of equipment damage caused by improper maintenance.

[0040] The branch port of the No. 1 tee 1, the branch port of the No. 2 tee 3 and the port are respectively connected to the No. 1 ball valve 2, the No. 2 ball valve 5 and the No. 3 ball valve 4 through internal and external threaded joints.

[0041] Under normal production conditions, the No. 1 ball valve 2 is in a closed state; the No. 2 ball valve 5 is in a closed state, and the No. 3 ball valve 4 is in an open state. Under normal production conditions, the upper chamber ventilation interface of the locking cylinder is connected to the upper chamber ventilation pipeline 6 through the main port and port of the No. 1 tee 1 to inflate and exhaust the gas. The No. 1 ball valve 2 set at the branch port of the No. 1 tee 1 is closed to ensure the normal operation of the upper chamber of the locking cylinder and avoid abnormal pressure relief; the lower chamber ventilation interface of the locking cylinder is connected to the lower chamber ventilation pipeline 7 through the main port and port of the No. 2 tee 3 to inflate and exhaust the gas. The No. 2 ball valve 5 set at the branch port of the No. 2 tee 3 is closed to ensure the normal operation of the upper chamber of the locking cylinder and avoid abnormal pressure relief. The No. 3 ball valve 4 set at the port of the No. 2 tee 3 is opened to ensure normal inflation and exhaust of the upper chamber of the locking cylinder.

[0042] Second preferred embodiment:

[0043] An emergency control method for a locking cylinder of a molten steel ladle turntable, comprising:

[0044] When the ventilation pipe 6 of the upper chamber of the cylinder cannot be exhausted and the cylinder rod cannot be extended: open the No. 1 ball valve 2 to exhaust, so that the upper chamber of the cylinder is depressurized, and the ventilation pipe 7 of the lower chamber of the cylinder is smoothly inflated, and the cylinder rod is extended; push the swing wedge into the socket to complete the position locking of the rotary support table.

[0045] When the cylinder lower chamber ventilation pipe 7 cannot be exhausted and the cylinder rod cannot be retracted: close the No. 3 ball valve 4 on the lower chamber ventilation pipe 7 to cut off the gas source; open the No. 2 ball valve 5 on the lower chamber ventilation pipe 7 to exhaust and relieve the pressure in the cylinder lower chamber; realize the smooth inflation of the cylinder upper chamber ventilation pipe 6 and retract the cylinder rod; pull the swinging wedge out of the socket to complete the release of the rotary support table position.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An emergency control device for locking cylinder of a steel ladle turret, characterized in that: include: A No. 1 tee (1) and a ball valve are arranged on the ventilation interface of the upper chamber of the locking cylinder, the main port of the No. 1 tee (1) is connected to the ventilation interface of the upper chamber of the locking cylinder, the branch port of the No. 1 tee (1) is connected to the No. 1 ball valve (2), and the port of the No. 1 tee (1) is connected to the upper chamber ventilation pipeline (6); A No. 2 tee (3) and a ball valve are arranged on the ventilation interface of the lower chamber of the locking cylinder, the main port of the No. 2 tee (3) is connected to the ventilation interface of the lower chamber, the branch port of the No. 2 tee (3) is connected to the No. 2 ball valve (5), and the port of the No. 2 tee (3) is connected to the No. 3 ball valve (4); the other end of the No. 3 ball valve (4) is connected to the ventilation pipeline (7) of the lower chamber.

2. The emergency control device for locking cylinder of molten steel ladle turret according to claim 1 is characterized in that: The No. 1 tee (1) and the No. 2 tee (3) are DN20 stainless steel tees.

3. The emergency control device for locking cylinder of molten steel ladle turret according to claim 1 is characterized in that: The No. 1 ball valve (2), No. 2 ball valve (5) and No. 3 ball valve (4) are all DN20 high-pressure ball valves.

4. The emergency control device for locking cylinder of molten steel ladle turret according to claim 1 is characterized in that: The branch port of the No. 1 tee (1), the branch port of the No. 2 tee (3) and the port are respectively connected to the No. 1 ball valve (2), the No. 2 ball valve (5) and the No. 3 ball valve (4) through internal and external threaded joints.

5. The emergency control device for locking cylinder of molten steel ladle turret according to claim 1 is characterized in that: Under normal production conditions, the No. 1 ball valve (2) is in a closed state; the No. 2 ball valve (5) is in a closed state; and the No. 3 ball valve (4) is in an open state.

6. An emergency control method for locking cylinder of a steel ladle turret, characterized in that: include: When the cylinder upper chamber ventilation pipe (6) cannot exhaust air and the cylinder rod cannot be extended, open the No. 1 ball valve (2) to exhaust air; When the cylinder lower chamber ventilation pipeline (7) cannot exhaust air and the cylinder rod cannot be retracted, the No. 3 ball valve (4) is closed to cut off the air source; and the No. 2 ball valve (5) is opened to exhaust air.

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