Electric servo pump control system for vibration control of crystallizer of billet continuous casting machine

Abstract

The utility model relates to an electric servo pump control system for billet continuous casting machine crystallizer vibration control, and relates to the field of continuous casting vibration control systems, the electric servo pump control system comprises a hydraulic cylinder, a bidirectional pump and a servo motor, the bidirectional pump is used for pumping oil and pressurizing and injecting the oil into the hydraulic cylinder, the servo motor is used for driving the bidirectional pump to rotate forwards and backwards, and the hydraulic cylinder is connected with an energy accumulator; the energy accumulator is a sealed container, a first containing cavity and a second containing cavity are formed in the hydraulic cylinder, the first containing cavity and the second containing cavity are both communicated with the energy accumulator, overflow valves are arranged between the energy accumulator and the hydraulic cylinder, the first containing cavity and the second containing cavity are each communicated with one overflow valve, and two one-way valves are connected to the energy accumulator. Each one-way valve is communicated with the containing cavity of the corresponding hydraulic cylinder, and oil in the energy accumulator flows into the hydraulic cylinders through the one-way valves. The device has the effect of reducing the energy consumption caused by the action of the hydraulic cylinder and driving the crystallizer to vibrate.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of continuous casting vibration control system, in particular to a kind of electric servo pump control system for bloom continuous casting machine crystallizer vibration control. BACKGROUND

[0002] Continuous casting is a kind of molten metal is continuously injected into crystallizer, so that molten metal solidification shell, and then the solidification is gradually continuous from crystallizer drawn process, continuous casting can obtain different length of casting, casting uniform structure, mechanical properties are good.

[0003] The existing crystallizer is provided with vibration control system, and the crystallizer is a kind of container for containing molten metal, and the molten metal is easy to adhere to the inner wall of the crystallizer after forming in the crystallizer, and the vibration control system reciprocates up and down, so that the continuous casting is more easily demoulded.

[0004] The related technical solutions in the above have the following defects: the weight of the crystallizer is large, the vibration of the crystallizer is driven by the hydraulic cylinder, the hydraulic cylinder needs to be driven by the motor to drive the oil pump, and is adjusted and controlled by the servo valve, so the energy consumption is large. Practical new type content

[0005] In order to reduce the energy consumption of the hydraulic cylinder action and drive the vibration of the crystallizer, the present application provides a kind of electric servo pump control system for bloom continuous casting machine crystallizer vibration control.

[0006] The electric servo pump control system for bloom continuous casting machine crystallizer vibration control provided by the present application adopts the following technical scheme:

[0007] A kind of electric servo pump control system for bloom continuous casting machine crystallizer vibration control, including hydraulic cylinder, bidirectional pump and servo motor, bidirectional pump is used to extract oil and pressurized injection into hydraulic cylinder, servo motor is used to drive bidirectional pump positive and negative rotation, accumulator is connected on the hydraulic cylinder, and the accumulator is a sealed container, first cavity and second cavity are formed in the hydraulic cylinder, first cavity and second cavity are communicated with the accumulator, overflow valve is arranged between the accumulator and the hydraulic cylinder, first cavity and second cavity are communicated with one overflow valve respectively, two check valves are connected on the accumulator, each check valve is communicated with the cavity of one hydraulic cylinder, and the oil in the accumulator flows into the hydraulic cylinder through the check valve.

[0008] By adopting the technical scheme, the bidirectional pump is driven to rotate by the servo motor, and then the hydraulic oil in one cavity of the hydraulic cylinder is pumped out by the bidirectional pump, the bidirectional pump injects the pressurized hydraulic oil into the other cavity, so that the piston rod of the hydraulic cylinder is actuated, the accumulator is arranged on the hydraulic cylinder, the overflow valve is arranged between the accumulator and the two cavities of the hydraulic cylinder, when the oil pressure in the hydraulic cylinder is too large, the overflow valve is actuated, the hydraulic oil can flow into the accumulator, the bidirectional pump is protected, with the accumulation of the hydraulic oil in the accumulator, the oil pressure in the accumulator is increased, the energy storage effect is achieved, the low-pressure oil is stored in the accumulator, when the solution pressure of the accumulator is higher than the oil pressure of the hydraulic cylinder cavity, the oil is supplemented to the hydraulic cylinder cavity through the one-way valve, so that the oil is supplemented to the system, the one-way valve is arranged on the accumulator, two oil paths are arranged between the first cavity or the second cavity and the accumulator, one oil path is controlled by the overflow valve, and the other oil path is controlled by the one-way valve, when the oil pressure in the cavity of the hydraulic cylinder is too large and the overflow valve is actuated, the hydraulic oil flows from the hydraulic cylinder to the accumulator through the overflow valve, the one-way valve can only be opened in one direction, so that the hydraulic oil can only flow from the accumulator to the hydraulic cylinder through the one-way valve. The electric servo pump control system directly provides energy according to the load demand, and the energy consumption is reduced.

[0009] Optionally, the first cavity and the second cavity are respectively connected with an electromagnetic valve, and the electromagnetic valve is used for cutting off the oil path and locking the hydraulic cylinder.

[0010] By adopting the technical scheme, the electromagnetic valve is arranged on the cavity of the hydraulic cylinder, the electromagnetic valve can control the oil path in the hydraulic cylinder, when the electromagnetic valve is closed, the hydraulic oil in the first cavity or the second cavity cannot flow, and then the piston rod of the hydraulic cylinder cannot act, and the hydraulic cylinder is locked.

[0011] Optionally, the hydraulic cylinder is provided with a valve block, a plurality of holes are formed in the valve block to form oil paths, the oil cylinder of the hydraulic cylinder is communicated with the valve block, and the electromagnetic valve, the one-way valve, the overflow valve and the accumulator are connected to the valve block.

[0012] By adopting the technical scheme, the electromagnetic valve, the one-way valve, the overflow valve and the accumulator are all installed on the valve block, the valve block is made of a block structure of a metal material with good structural strength, has high high-pressure resistance, a plurality of holes are formed in the valve block as oil paths, so that the hydraulic oil can flow in the valve block and form a loop, and bolts or other connecting members can be arranged on the valve block and installed on the hydraulic cylinder more conveniently, so that the structure is simple and the site and cost for setting the hydraulic station can be saved.

[0013] Optionally, the bidirectional pump, the servo motor and the valve block are installed on the hydraulic cylinder, and the hydraulic cylinder is installed on the vibration frame of the crystallizer.

[0014] By adopting the technical scheme, the bidirectional pump and the servo motor are arranged on the hydraulic cylinder, so that the effect of simplifying the structure is further achieved.

[0015] Optionally, the servo motor is directly connected with the bidirectional pump through a connecting piece spline.

[0016] By adopting the technical scheme, the servo motor is directly connected with the bidirectional pump, so that the step of arranging a shaft coupling between the output shaft of the servo motor and the bidirectional pump is reduced, thereby further reducing the overall size and weight and achieving the effect of simplifying the structure.

[0017] To sum up, the beneficial technical effects of the present application are as follows:

[0018] 1. The bidirectional pump and the servo motor are arranged on the hydraulic cylinder, so that the servo motor can drive the bidirectional pump to rotate, thereby the hydraulic oil in one cavity of the hydraulic cylinder is extracted through the bidirectional pump, and the bidirectional pump injects the pressurized hydraulic oil into another cavity, so as to achieve the effect of making the piston rod of the hydraulic cylinder act. The accumulator is arranged on the hydraulic cylinder, and overflow valves are arranged between the accumulator and the two cavities of the hydraulic cylinder, respectively. When the oil pressure in the hydraulic cylinder is too large, the overflow valves act, and the hydraulic oil can flow into the accumulator, thereby achieving the effect of protecting the bidirectional pump. With the accumulation of the hydraulic oil in the accumulator, the oil pressure in the accumulator rises, thereby achieving the energy storage effect. The accumulator stores low-pressure oil. When the solution pressure in the accumulator is higher than the oil pressure in the hydraulic cylinder cavity, the oil is supplemented to the hydraulic cylinder cavity through the one-way valve, thereby achieving the effect of supplementing oil to the system.

[0019] 2. The one-way valve is arranged on the accumulator, two oil paths are arranged between the first cavity or the second cavity and the accumulator, one oil path is controlled through the overflow valve, and the other oil path is controlled through the one-way valve. When the oil pressure in the cavity of the hydraulic cylinder is too large and the overflow valve acts, the hydraulic oil flows from the hydraulic cylinder to the accumulator through the overflow valve. The one-way valve can only be opened in one direction, so that the hydraulic oil can only flow from the accumulator to the hydraulic cylinder through the one-way valve. The electric servo pump control system directly provides energy according to the load demand, thereby achieving the effect of reducing energy consumption.

[0020] 3. The valve block is arranged on the hydraulic cylinder, so that the electromagnetic valve, the one-way valve, the overflow valve and the accumulator are all installed on the valve block. The valve block is made of a block structure of a metal material with good structural strength and strong high-pressure resistance. A plurality of holes are arranged in the valve block as oil paths, so that the hydraulic oil can flow in the valve block and form a loop. Bolts or other connecting pieces can be arranged on the valve block, so that the valve block is more convenient to install on the hydraulic cylinder and has a simple structure, thereby saving the site and cost of setting up a hydraulic station. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a schematic diagram of the overall structure of the embodiment of the present application.

[0022] Figure 2 is a structural schematic view of a valve block of an embodiment of the present application.

[0023] Figure 3 is a hydraulic frame of an embodiment of the present application Figure 1 .

[0024] Figure 4 is a hydraulic frame of an embodiment of the present application Figure 2 .

[0025] Reference signs: 1, valve block; 11, oil supply pipe; 2, hydraulic cylinder; 21, first cavity; 22, second cavity; 3, electromagnetic valve; 4, one-way valve; 5, overflow valve; 6, accumulator; 7, bidirectional pump; 8, servo motor. DETAILED DESCRIPTION

[0026] The present application is further described in detail below with reference to the accompanying drawings.

[0027] An electric servo pump control system for bloom continuous casting machine crystallizer vibration control is disclosed in the embodiments of the present application, referring to Figure 1 , Figure 2 and Figure 3, including valve block 1, hydraulic cylinder 2, two electromagnetic valves 3, two check valves 4, two overflow valves 5 and accumulator 6, valve block 1 is a metal block, a plurality of through holes are formed in valve block 1, hydraulic cylinder 2, two electromagnetic valves 3, two check valves 4, two overflow valves 5 and accumulator 6 are all sealedly connected at the through hole openings of valve block 1, so that the through holes in valve block 1 play the effect of oil conveying, two oil supply pipes 11 are connected to valve block 1, the oil supply pipes 11 are respectively communicated with hydraulic cylinder 2 through valve block 1, the oil cylinder of hydraulic cylinder 2 is divided into first cavity 21 and second cavity 22, when the piston rod of hydraulic cylinder 2 slides in the oil cylinder, the first cavity 21 and the second cavity 22 in hydraulic cylinder 2 respectively admit oil or discharge oil, the two oil supply pipes 11 respectively fill hydraulic oil into hydraulic cylinder 2 and lead out, so that hydraulic cylinder 2 can stretch and retract and drive the vibration frame to act. The first cavity 21 and the second cavity 22 are respectively communicated with one electromagnetic valve 3, the electromagnetic valve 3 is arranged between the oil supply pipe 11 and the hydraulic cylinder 2, when the two electromagnetic valves 3 are closed, hydraulic oil is difficult to flow in the first cavity 21 and the second cavity 22 in hydraulic cylinder 2, so that hydraulic cylinder 2 is difficult to act and keep still, achieving the effect of locking hydraulic cylinder 2. The first cavity 21 and the second cavity 22 are all communicated with accumulator 6, accumulator 6 is a closed container, one overflow valve 5 is respectively connected between the first cavity 21 and the second cavity 22 and accumulator 6, the overflow valve 5 is one-way flow. When the cavity pressure of hydraulic cylinder 2 is greater than the set pressure of overflow valve 5, the oil liquid in the cavity of hydraulic cylinder 2 overflows to accumulator 6 through overflow valve 5. When the oil pressure in the first cavity 21 or the second cavity 22 is too large, the hydraulic oil in the first cavity 21 or the second cavity 22 drives the overflow valve 5 connected with the cavity, so that the hydraulic oil can flow into accumulator 6. Accumulator 6 is respectively communicated with the first cavity 21 and the second cavity 22, the first cavity 21 and the second cavity 22 are all connected with check valve 4 between accumulator 6, when oil liquid enters accumulator 6, accumulator 6 stores low-pressure oil, when the oil pressure in accumulator 6 is higher than the oil liquid pressure in the cavity of hydraulic cylinder 2, the hydraulic oil in accumulator 6 can drive check valve 4, so that the hydraulic oil in accumulator 6 flows to hydraulic cylinder 2 in one-way, achieving the effect of oil supplementing to the system.

[0028] With reference to Figure 2 , Figure 3 and Figure 4 , a bidirectional pump 7 is arranged on valve block 1, the bidirectional pump 7 is used for pressurizing hydraulic oil and driving the piston rod of hydraulic cylinder 2 to act. A servo motor 8 is connected to bidirectional pump 7, the servo motor 8 is used for driving the driving shaft of bidirectional pump 7 to rotate reversely, so as to control the elongation or contraction of hydraulic cylinder 2. When the servo motor 8 drives the driving shaft of bidirectional pump 7 to rotate, bidirectional pump 7 pumps out the oil liquid in one cavity and injects into another cavity, so that hydraulic cylinder 2 can elongate or contract.

[0029] With reference to Figure 2 , Figure 3 and Figure 4When the servo motor 8 drives the bidirectional pump 7 to act, the two electromagnetic valves 3 are opened, and at this time, the oil can flow between the hydraulic cylinder 2 and the bidirectional pump 7, so that the hydraulic cylinder 2 can act. When the first cavity 21 is filled with oil and the second cavity 22 is drained of oil, the oil flows in the hydraulic cylinder 2 through the oil supply pipe 11, and the bidirectional pump 7 provides hydraulic energy. When the oil pressure in the first cavity 21 is larger, the differential pressure on both sides of the overflow valve 5 can make the valve core of the overflow valve 5 act, and at this time, the hydraulic oil in the first cavity 21 flows into the accumulator 6. As the oil in the accumulator 6 increases, the oil pressure in the accumulator 6 gradually increases, and when the oil pressure in the accumulator 6 is greater than the oil pressure in the first cavity 21 or the second cavity 22, the one-way valve 4 acts, so that the hydraulic oil in the accumulator 6 can flow into the hydraulic cylinder 2 system, achieving the effect of oil replenishment.

[0030] The implementation principle of the embodiment of the present application is that the hydraulic cylinder 2 and the bidirectional pump 7 are arranged on the valve block 1, so that the bidirectional pump 7 can pressurize the hydraulic oil under the drive of the servo motor 8, so that the high-pressure hydraulic oil enters the hydraulic cylinder 2, and then the hydraulic cylinder 2 acts to extend and retract. The two one-way valves 4 and the two overflow valves 5 are arranged on the valve block 1, so that the overflow valve 5 has the effect of protecting the bidirectional pump 7. When the oil pressure in the hydraulic cylinder 2 is too high and the pressure in the accumulator 6 is relatively low, the overflow valve 5 can automatically act, so that the hydraulic oil in the hydraulic cylinder 2 flows into the accumulator 6, and the hydraulic oil in the accumulator 6 can flow back to the oil path between the hydraulic cylinder 2 and the bidirectional pump 7 through the one-way valve 4. When the oil pressure in the hydraulic cylinder 2 is relatively low and the bidirectional pump 7 injects the pressurized oil into the hydraulic cylinder 2, the hydraulic oil in the accumulator 6 can flow into the hydraulic cylinder 2, thereby replenishing the oil of the hydraulic system.

[0031] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. An electric servo pump control system for vibration control of a billet continuous casting machine mold, characterized by: The invention comprises a hydraulic cylinder (2), a bidirectional pump (7) and a servo motor (8). The bidirectional pump (7) is used to extract oil and pressurize it to inject it into the hydraulic cylinder (2). The servo motor (8) is used to drive the bidirectional pump (7) to rotate forward and reverse. The hydraulic cylinder (2) is connected to an accumulator (6). The accumulator (6) is a sealed container. A first cavity (21) and a second cavity (22) are formed in the hydraulic cylinder (2). The first cavity (21) and the second cavity (22) are both communicated with the accumulator (6). An overflow valve (5) is provided between the accumulator (6) and the hydraulic cylinder (2). The first cavity (21) and the second cavity (22) are respectively communicated with one overflow valve (5). The accumulator (6) is connected to two one-way valves (4). Each one-way valve (4) is communicated with a cavity of the hydraulic cylinder (2). The oil in the accumulator (6) flows into the hydraulic cylinder (2) through the one-way valve (4).

2. The electric servo pump control system for vibration control of a billet continuous casting machine mold according to claim 1, characterized in that: The first chamber (21) and the second chamber (22) are respectively connected to a solenoid valve (3), and the solenoid valve (3) is used to cut off the oil circuit and lock the hydraulic cylinder (2).

3. The electric servo pump control system for vibration control of a billet continuous casting machine mold according to claim 2, characterized in that: The hydraulic cylinder (2) is provided with a valve block (1), a plurality of holes are provided in the valve block (1) to form an oil circuit, the oil cylinder of the hydraulic cylinder (2) is connected to the valve block (1), and the solenoid valve (3), the one-way valve (4), the overflow valve (5) and the accumulator (6) are all connected to the valve block (1).

4. The electric servo pump control system for vibration control of a billet continuous casting machine mold according to claim 3, characterized in that: The bidirectional pump (7), servo motor (8) and valve block (1) are mounted on a hydraulic cylinder (2), and the hydraulic cylinder (2) is mounted on a vibration frame of the crystallizer.

5. The electric servo pump control system for vibration control of a billet continuous casting machine mold according to claim 1, characterized in that: The servo motor (8) is directly connected to the bidirectional pump (7) via a spline connection.

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