Synchronous speed regulation hydraulic oil circuit in metallurgical industry

Abstract

The utility model relates to a metallurgical industry synchronous speed regulation hydraulic oil circuit, which comprises a synchronous speed regulation system and an adjusting system, the adjusting system is connected in parallel with the synchronous speed regulation system, and the synchronous speed regulation system comprises a first electromagnetic directional valve, a rectifying plate with a speed regulation valve, a synchronous shunt motor, a ball valve, a constant speed hydraulic cylinder, an oil supply pipe and an oil return pipe. The adjusting system comprises a second electromagnetic reversing valve and a double-one-way throttle valve, each double-one-way throttle valve is connected into a flow dividing pipeline of the synchronous flow dividing motor in parallel, and the first electromagnetic reversing valve is connected with the oil inlet ends of the first constant-speed hydraulic cylinders after being connected with the flow dividing pipeline of the synchronous flow dividing motor after being connected with the oil inlet ends of the second constant-speed hydraulic cylinders after being combined. The control system has the advantages of being simple in process, easy to operate, high in synchronous rate of the constant-speed hydraulic cylinder and accurate and reliable in synchronous control.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic synchronous speed regulation, in particular to a synchronous speed regulation hydraulic oil circuit in the metallurgical industry. Background Art

[0002] Hydraulic devices have been widely used in the metallurgical industry, especially in equipment with a high degree of automation and miniaturization. Hydraulic equipment in the metallurgical industry is often used to synchronize two or more actuators and control the speed of the actuators at the same time. Traditional control methods for the synchronous operation of more than two actuators in hydraulic devices often use a control method that combines a hydraulic system with an electronic control system. The overall control system is complex and inconvenient to operate. Multiple control valves jointly control the action of an actuator, and control instructions are easily miscommunicated. The actuators cannot work synchronously or adjust their speed synchronously. If air is mixed into the hydraulic pipeline or oil leaks, it is very easy to cause the actuator hydraulic cylinder to be out of sync. The use conditions of the hydraulic device are harsh, and it is impossible to adjust the working conditions of multiple actuators to work synchronously at any time. Summary of the invention

[0003] In order to overcome the problems of the prior art, the utility model provides a synchronous speed regulation hydraulic oil circuit for the metallurgical industry, which controls a plurality of constant speed hydraulic cylinders through a synchronous shunt motor to control all constant speed hydraulic cylinders to have the same hydraulic control flow, and the return flow of the plurality of hydraulic cylinders is connected to a rectifier plate with a speed regulating valve, and the return flow is adjusted by the rectifier plate and the speed regulating valve to complete the synchronous speed regulation control of the plurality of constant speed hydraulic cylinders. The control system is simple and convenient, easy to operate, and the synchronous control is accurate and reliable. The hydraulic cylinder asynchronism problem caused by air mixing into the system or oil leakage is corrected through the parallel adjustment system. The hydraulic cylinder synchronization rate is high, no use is required, and the environmental applicability is high. The execution synchronization of all hydraulic cylinders can be adjusted at any time to ensure the completion of the synchronous speed regulation.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A synchronous speed regulation hydraulic oil circuit for the metallurgical industry, comprising a synchronous speed regulation system and an adjustment system, wherein the adjustment system is connected in parallel to the synchronous speed regulation system, wherein the synchronous speed regulation system comprises an electromagnetic reversing valve 1, a rectifier plate with a speed regulating valve, a synchronous shunt motor, a ball valve, a constant speed hydraulic cylinder, an oil supply pipe and an oil return pipe, wherein the oil supply pipe is connected to the synchronous shunt motor through an electromagnetic reversing valve 1, and after being shunted by the synchronous shunt motor, the oil supply pipe is connected to the oil inlet ends of several constant speed hydraulic cylinders through ball valves respectively, and after the oil circuits of several constant speed hydraulic cylinders are merged at the oil return end, the rectifier plate with the speed regulating valve is connected to the return pipe through an electromagnetic reversing valve 1;

[0006] The adjustment system includes an electromagnetic reversing valve 2 and a double one-way throttle valve. The electromagnetic reversing valve 2 and the electromagnetic reversing valve 1 are connected to the oil supply pipe in parallel. The electromagnetic reversing valve 2 is connected to a plurality of double one-way throttle valves. Each double one-way throttle valve is connected in parallel to the shunt pipeline of the synchronous shunt motor. The return port of the electromagnetic reversing valve 2 is connected in parallel to the oil return pipe.

[0007] Furthermore, the rectifier plate with the speed regulating valve comprises a full-bridge rectifier plate and a speed regulating valve, and the speed regulating valve is arranged between the full-bridge rectifier plates.

[0008] Furthermore, the double one-way throttle valve comprises a one-way valve and a throttle valve, and the one-way valve and the throttle valve are connected in parallel to the pipeline.

[0009] Furthermore, a one-way valve is provided at the inlet position of the oil inlet pipe.

[0010] Furthermore, pressure measuring joints are respectively provided at the inlet positions and outlet confluence positions of the plurality of constant velocity hydraulic cylinders.

[0011] Furthermore, a pressure measuring joint is provided at the outlet position of the dual one-way throttle valve.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. Through the synchronous shunt motor and the rectifier plate with the speed regulating valve, several constant speed hydraulic cylinders are synchronously controlled to realize the synchronous operation of all the constant speed hydraulic cylinders that perform the action. The control system has simple process, easy operation, high synchronization rate of the constant speed hydraulic cylinders, and accurate and reliable synchronous control.

[0014] 2. The synchronous shunt motor controls the running speed of the constant speed hydraulic cylinder. The rectifier plate with the speed regulating valve controls the speed uniformly, so that a single hydraulic system can adjust the extension and retraction speed of all hydraulic cylinders. The command is single and there is no interference, which improves the synchronization ability of the actuator constant speed hydraulic cylinder.

[0015] 3. Adjust the system to correct the asynchronous execution of the constant-speed hydraulic cylinder caused by air mixing or oil leakage in the hydraulic system, adjust the oil inlet and return flow of the compensation hydraulic cylinder, and ensure the synchronization of the execution of the constant-speed hydraulic cylinder in the hydraulic oil circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model is a schematic diagram of the structure of a synchronous speed regulating hydraulic oil circuit in the metallurgical industry.

[0017] Figure 2 It is a structural schematic diagram of a rectifier plate with a speed regulating valve described in the utility model.

[0018] In the figure: 1 one-way valve; 21 electromagnetic reversing valve 1; 22 electromagnetic reversing valve 2; 3 rectifier plate with speed regulating valve;

[0019] 31 full-bridge rectifier; 32 speed control valve; 4 synchronous shunt motor; 5 double one-way throttle valve; 6 ball valve; 7 pressure measuring joint; 8 constant velocity hydraulic cylinder; P return oil pipe; T inlet oil pipe. DETAILED DESCRIPTION

[0020] The specific implementation of the utility model is further described below in conjunction with the accompanying drawings:

[0021] like Figure 1-Figure 2 As shown, the working principle of a synchronous speed regulation hydraulic oil circuit in the metallurgical industry is as follows: a synchronous speed regulation control system composed of a synchronous shunt motor 4 and a rectifier plate 3 with a speed regulating valve synchronously controls a plurality of constant speed hydraulic cylinders 8, thereby realizing synchronous speed regulation control of a plurality of constant speed hydraulic cylinders 8 by a single hydraulic system. The synchronous speed regulation system is simple and efficient, and the synchronous control is accurate and reliable. The dual one-way throttle valve 5 of the adjustment system adjusts and corrects the problem of asynchronous operation of a plurality of constant speed hydraulic cylinders 8, thereby improving the synchronization rate of the constant speed hydraulic cylinders 8.

[0022] like Figure 1-Figure 2 As shown, a synchronous speed regulation hydraulic oil circuit for metallurgical industry includes a synchronous speed regulation system and an adjustment system. The adjustment system is connected in parallel to the synchronous speed regulation system. The synchronous speed regulation system includes an electromagnetic reversing valve 21, a rectifier plate 3 with a speed regulating valve, a synchronous shunt motor 4, a ball valve 6, a constant speed hydraulic cylinder 8, an oil supply pipe T and an oil return pipe P. The oil supply pipe T is connected to the synchronous shunt motor 4 through an electromagnetic reversing valve 21, and after being shunted by the synchronous shunt motor 4, it is respectively connected to the oil inlet ends of the two constant speed hydraulic cylinders 8 through the ball valve 6. The oil supply pipe T is connected to the oil inlet of the synchronous shunt motor 4 through the electromagnetic reversing valve 21. The hydraulic oil supplied by the oil supply pipe T is shunted into two shunt oil circuits of equal size in the synchronous shunt motor 4. The two shunt oil circuits are respectively connected to the two constant speed hydraulic cylinders 8. The shunt oil circuits evenly divided by the synchronous shunt motor 4 are used to control The two constant-speed hydraulic cylinders 8 move synchronously. After the oil circuits of the two constant-speed hydraulic cylinders 8 are merged at the return oil end, they are connected to the rectifier plate 3 with a speed regulating valve through a ball valve 6. The ball valve 6 is used to close the flow of hydraulic oil in the hydraulic pipeline during maintenance. Each constant-speed hydraulic cylinder 8 corresponds to a ball valve 6. When one of the constant-speed hydraulic cylinders 8 fails, the corresponding ball valve 6 can be closed to repair this constant-speed hydraulic cylinder 8 without affecting the operation of other constant-speed hydraulic cylinders 8. The speed regulating valve 3 with a rectifier plate can divert the incoming oil or return oil to the speed regulating valve 32, so that the hydraulic oil flow in the pipeline is stable and the flow rate is stable. The two constant-speed hydraulic cylinders 8 are stable and synchronous. The synchronous shunt motor 4 and the rectifier plate 3 with a speed regulating valve work together to synchronously regulate the speed of the constant-speed hydraulic cylinders 8. The synchronous speed regulation is stable and efficient, and the synchronization rate is high. The rectifier plate 3 with a speed regulating valve is connected to the return pipe P through an electromagnetic reversing valve 21.

[0023] The adjustment system includes an electromagnetic reversing valve 22 and a double one-way throttle valve 5. The electromagnetic reversing valve 22 and the electromagnetic reversing valve 1 21 are connected in parallel to the oil supply pipe T. The electromagnetic reversing valve 22 is connected to a plurality of double one-way throttle valves 5. Each double one-way throttle valve 5 is connected in parallel to the shunt pipeline of the synchronous shunt motor 4. Each constant speed hydraulic cylinder 8 is connected to a double one-way throttle valve 5 in the oil inlet. Two double one-way throttle valves are connected in parallel to the electromagnetic reversing valve 2. When the speeds of the two constant speed hydraulic cylinders 8 are different, the slow constant speed hydraulic cylinder is connected to the slow constant speed hydraulic cylinder through the electromagnetic reversing valve 22. The double one-way throttle valve 5 is connected to the oil supply pipe T to increase the oil supply to the slow constant-speed hydraulic cylinder 8. The double one-way throttle valve 5 corresponding to the fast constant-speed hydraulic cylinder 8 is connected to the return pipe P. A part of the hydraulic oil diverted by the synchronous shunt motor 4 to the fast constant-speed hydraulic cylinder 8 is returned to the return pipe P through the double one-way throttle valve 5 to reduce the oil supply to the fast constant-speed hydraulic cylinder 8. The two unsynchronized constant-speed hydraulic cylinders 8 are adjusted to synchronization to ensure that the two constant-speed hydraulic cylinders 8 maintain synchronous speed movement. The return port of the electromagnetic reversing valve 22 is connected in parallel to the return pipe P.

[0024] like Figure 1 As shown, further, the rectifier plate 3 with the speed regulating valve includes a full-bridge rectifier plate 31 and a speed regulating valve 32, and the speed regulating valve 32 is arranged between the full-bridge rectifier plates 31, the full-bridge rectifier plates 31 adjust the flow stability of the synchronous speed regulating system, and the speed regulating valve 32 adjusts the flow rate stability in the synchronous speed regulating system.

[0025] like Figure 1 As shown, further, the dual one-way throttle valve 5 includes a one-way valve and a throttle valve, and the one-way valve and the throttle valve are connected in parallel to the pipeline.

[0026] like Figure 1 As shown, further, a one-way valve 1 is provided at the inlet position of the oil inlet pipe T.

[0027] like Figure 1 As shown, further, pressure measuring joints 7 are provided at the inlet positions and outlet junction positions of the plurality of constant velocity hydraulic cylinders 8 to monitor the inlet and outlet pressures of each constant velocity hydraulic cylinder 8 in real time, and the pressures are fed back to the adjustment system to adjust the synchronous speeds of the two constant velocity hydraulic cylinders 8 through the adjustment system.

[0028] like Figure 1 As shown, further, a pressure measuring joint 7 is provided at the outlet position of the dual one-way throttle valve 5.

[0029] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes according to the technical scheme and concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A synchronous speed regulation hydraulic oil circuit for the metallurgical industry, characterized in that: It includes a synchronous speed regulation system and an adjustment system. The adjustment system is connected in parallel to the synchronous speed regulation system. The synchronous speed regulation system includes an electromagnetic reversing valve 1, a rectifier plate with a speed regulating valve, a synchronous shunt motor, a ball valve, a constant speed hydraulic cylinder, an oil supply pipe and an oil return pipe. The oil supply pipe is connected to the synchronous shunt motor through an electromagnetic reversing valve 1, and is connected to the oil inlet ends of several constant speed hydraulic cylinders through ball valves after being shunted by the synchronous shunt motor. After the several constant speed hydraulic cylinders are merged at the oil return end, they are connected to the rectifier plate with a speed regulating valve through a ball valve. The rectifier plate with the speed regulating valve is connected to the return pipe through an electromagnetic reversing valve 1; The adjustment system includes an electromagnetic reversing valve 2 and a double one-way throttle valve. The electromagnetic reversing valve 2 and the electromagnetic reversing valve 1 are connected to the oil supply pipe in parallel. The electromagnetic reversing valve 2 is connected to a plurality of double one-way throttle valves. Each double one-way throttle valve is connected in parallel to the shunt pipeline of the synchronous shunt motor. The reflux port of the electromagnetic reversing valve 2 is connected in parallel to the reflux source.

2. The synchronous speed regulating hydraulic oil circuit for metallurgical industry according to claim 1 is characterized in that: The rectifier plate with a speed regulating valve comprises a full-bridge rectifier plate and a speed regulating valve, and the speed regulating valve is arranged between the full-bridge rectifier plates.

3. The synchronous speed regulating hydraulic oil circuit for metallurgical industry according to claim 1 is characterized in that: The double one-way throttle valve comprises a one-way valve and a throttle valve, and the one-way valve and the throttle valve are connected in parallel to the pipeline.

4. The synchronous speed regulating hydraulic oil circuit for metallurgical industry according to claim 1 is characterized in that: A one-way valve is arranged at the inlet position of the oil inlet pipe.

5. The synchronous speed regulating hydraulic oil circuit for metallurgical industry according to claim 1 is characterized in that: The inlet position and the outlet confluence position of the constant velocity hydraulic cylinder are respectively provided with pressure measuring joints.

6. The synchronous speed regulating hydraulic oil circuit for metallurgical industry according to claim 1 is characterized in that: A pressure measuring joint is arranged at the outlet of the double one-way throttle valve.

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