A tilting device for an electric furnace

Abstract

The utility model discloses a kind of electric furnace body tilting devices, including electric furnace, electric furnace cradle, one plunger cylinder, concrete foundation and cradle platform, electric furnace bottom is installed on electric furnace cradle, electric furnace cradle is installed on cradle platform;Single plunger cylinder lower part is connected with concrete foundation by hinge trunnion, single plunger cylinder upper part is connected with electric furnace by hinge trunnion.

Description

Technical Field

[0001] This utility model relates to the field of iron and steel smelting, and in particular to an electric furnace body tilting device. Background Technology

[0002] Currently, in the electric furnace production process, the tilting of the electric furnace body is basically done by a dual-cylinder system. If the cleanliness of the hydraulic fluid in the hydraulic system does not meet the relevant requirements, the hydraulic valve may become stuck, causing one cylinder to move while the other may not. If the problem is discovered in time, it can be stopped and the fault can be dealt with immediately. If it is not discovered in time, it may cause a safety production accident of the furnace body tipping over. Utility Model Content

[0003] To address this issue, this utility model proposes a furnace body tilting device, which uses a single oil cylinder drive and dual oil circuit control. This not only solves the problem of oil cylinder synchronization but also ensures that if the main hydraulic valve (proportional directional valve) fails, another system can be put into use immediately, thus guaranteeing smooth production.

[0004] To achieve the purpose of this utility model, the following technical solution is adopted:

[0005] An electric furnace body tilting device includes an electric furnace, an electric furnace rocker, a plunger cylinder, a concrete foundation, and a rocker platform. The bottom of the electric furnace is mounted on the electric furnace rocker, and the electric furnace rocker is mounted on the rocker platform. The lower part of the single plunger cylinder is connected to the concrete foundation via a hinge trunnion, and the upper part of the single plunger cylinder is connected to the electric furnace via a hinge trunnion.

[0006] The electric furnace body tilting device, wherein: the plunger cylinder is located on one side of the electric furnace.

[0007] The electric furnace body tilting device further includes a hydraulic control system, which comprises an automatic control unit and a manual control unit, respectively connected to the plunger cylinder.

[0008] The electric furnace body tilting device includes an automatic control unit comprising a first high-pressure ball valve, a second high-pressure ball valve, a third high-pressure ball valve, a proportional directional valve, a locking plug, a plug cover, and a solenoid ball valve.

[0009] The electric furnace body tilting device comprises: the hydraulic pump station supplying pressure oil P at its oil inlet P is connected to the P port of the proportional directional valve via a first high-pressure ball valve; the T port of the proportional directional valve is connected to the return oil port T of the hydraulic pump station via a second high-pressure ball valve; the proportional directional valve port is divided into two oil circuits via a third high-pressure ball valve, one circuit being connected to the A port of the locking plug, and then connected to the oil port B of the plunger cylinder via the B port of the locking plug; the other circuit is connected to the P port of the solenoid ball valve and the spring cavity of the locking plug via the plug cover plate; the T port of the solenoid ball valve is connected to the drain port L; and the L port is connected to the oil tank of the hydraulic pump station via a pipeline.

[0010] The electric furnace body tilting device includes: the manual control unit comprising a manual reversing valve, a hydraulic check valve, a fourth high-pressure ball valve, a fifth high-pressure ball valve, a sixth high-pressure ball valve, and a seventh high-pressure ball valve.

[0011] The electric furnace body tilting device comprises: the P port of the hydraulic pump station's conveying pressure oil P is connected to the P port of the manual directional valve via a sixth high-pressure ball valve; the A port of the manual directional valve is connected to the A port of the hydraulic control check valve via a fourth high-pressure ball valve; the B port of the hydraulic control check valve is connected to the oil port B of the plunger cylinder; the control port P of the hydraulic control check valve is connected to the B port of the manual directional valve via a fifth high-pressure ball valve; the T port of the manual directional valve is connected to the T port of the hydraulic pump station's oil tank via a seventh high-pressure ball valve; and the drain port L of the hydraulic control check valve is connected to the oil tank of the hydraulic pump station via a pipeline. Attached Figure Description

[0012] Figure 1 A schematic diagram of the electric furnace body tilting device;

[0013] Figure 2 This is a schematic diagram of a hydraulic control system. Detailed Implementation

[0014] The following is in conjunction with the appendix Figure 1 , 2 The specific embodiments of this utility model will be described in detail below.

[0015] like Figure 1 As shown, the electric furnace body tilting device includes an electric furnace 101, an electric furnace rocker 102, a plunger cylinder 104, a concrete foundation 103, and a rocker platform 105.

[0016] The bottom of the electric furnace 101 is mounted on the electric furnace rocker 102, and the electric furnace rocker 102 is mounted on the rocker platform 105; the plunger cylinder 104 is located on one side of the electric furnace, the lower part of the plunger cylinder 104 is connected to the concrete foundation 103 through a hinge trunnion, and the upper part of the plunger cylinder 104 is connected to the electric furnace 101 through a hinge trunnion.

[0017] The electric furnace body tilting device also includes a hydraulic control system, such as... Figure 2 As shown, the hydraulic control system includes an automatic control unit and a manual control unit, which are respectively connected to the piston cylinder 104.

[0018] The automatic control unit includes a first high-pressure ball valve 14, a second high-pressure ball valve 11, a third high-pressure ball valve 12, a proportional directional valve 13 (with port A sealed), a locking plug 3, a plug cover plate 4, and a solenoid ball valve 5. The hydraulic pump station delivers pressurized oil P through port P, which is connected to port P of the proportional directional valve 13 via the first high-pressure ball valve 14. Port T of the proportional directional valve 13 is connected to the return port T of the hydraulic pump station via the second high-pressure ball valve 11. Port B of the proportional directional valve 13 is divided into two oil circuits via the third high-pressure ball valve (12). One circuit is connected to port A of the locking plug 3, and then to port B of the plunger cylinder 1 via port B of the locking plug 3. The other circuit is connected to the spring cavity of the locking plug 3 via port P of the solenoid ball valve 5 through the plug cover plate 4. Port T of the solenoid ball valve 5 is connected to the drain port L, and port L is connected to the oil tank of the hydraulic pump station via a pipeline.

[0019] The manual control unit includes a manual directional valve 8, a hydraulically controlled check valve 2, a fourth high-pressure ball valve 6, a fifth high-pressure ball valve 7, a sixth high-pressure ball valve 10, and a seventh high-pressure ball valve 9. The P port of the hydraulic pump station's delivery pressure oil P is connected to the P port of the manual directional valve 8 via the sixth high-pressure ball valve 10. The A port of the manual directional valve 8 is connected to the A port of the hydraulically controlled check valve 2 via the fourth high-pressure ball valve 6. The B port of the hydraulically controlled check valve 2 is connected to the B port of the plunger cylinder 1. The control port P of the hydraulically controlled check valve 2 is connected to the B port of the manual directional valve 8 via the fifth high-pressure ball valve 7. The T port of the manual directional valve 8 is connected to the T port of the hydraulic pump station's oil tank via the seventh high-pressure ball valve 9. The drain port L of the hydraulically controlled check valve 2 is connected to the oil tank of the hydraulic pump station via a pipeline.

[0020] During normal smelting in the electric furnace, the fourth high-pressure ball valve 6, the fifth high-pressure ball valve 7, the seventh high-pressure ball valve 9, and the sixth high-pressure ball valve 10 are in the closed state, and the manual valve 8 is in the neutral position and in standby state.

[0021] Under normal smelting conditions, the plunger cylinder 1 is locked by the plug-in 3, the cover plate 4, and the solenoid ball valve 5, and the furnace body is in a stationary position. When the production personnel need to adjust the position of the furnace body, they will control the computer PLC through the furnace crank handle to send an analog or digital signal to the proportional directional valve 13. At the same time, the solenoid ball valve 5 is energized, the plug-in 3 is unlocked, and the extension or retraction and movement speed of the plunger cylinder are controlled by the movement of the valve core of the proportional directional valve 13 and the opening degree, thereby adjusting the position of the furnace body. When the furnace body needs to be raised, the solenoid ball valve 5 is energized, and the left side of the proportional directional valve 13 receives a signal from the PLC. The valve core moves to the right (at this time, oil ports P and B are connected). Then, the pressure oil P from the hydraulic pump station passes through the P port and B port of the high-pressure ball valve 14 and the A port and B port of the proportional directional valve 13, reaching the oil port B of the plunger cylinder 1. The plunger of the plunger cylinder 1 extends, and the furnace body rises (towards the tapping direction). Conversely, when the furnace body needs to be lowered, the PLC transmits a signal... The incoming signal causes the proportional directional valve 13 to switch to the left. The T port and B port of the proportional directional valve 13 are connected. Since the center of the furnace body and the center of rotation of the furnace body do not coincide, the furnace body is eccentrically arranged relative to the center of rotation. At this time, due to the action of the gravity torque of the furnace body, the hydraulic oil in the plunger cylinder 1 flows through its oil port B, through the B port and A port of the plug 3, through the high-pressure ball valve 12 to reach the B port of the proportional directional valve 13, and then flows out from the T port of the proportional directional valve 13 to reach the oil tank of the hydraulic pump station, completing the descent of the furnace body (movement in the direction of slag discharge).

[0022] When any of the PLC signals or other signals of the proportional directional valve 13, plug-in 3, or solenoid ball valve 5 malfunction, the furnace body will not operate. In this case, quickly open the high-pressure ball valves 6, 7, 9, and 10, and push the handle of the manual directional valve 8 to the left to reverse its direction. The oil will then flow through the P and A ports of the manual directional valve 8 and the high-pressure ball valve 6 along the pipeline to the A and B ports of the hydraulic check valve 2, and finally to the B port of the plunger cylinder 1, causing it to rise (moving towards the steel tapping direction). Conversely, pulling the handle of the manual directional valve 8 to the right will lower the furnace body (moving towards the slag tapping direction).

[0023] This invention solves the problem of cylinder synchronization and ensures that if the proportional directional valve fails, another system can be put into use immediately, thus guaranteeing production safety.

Claims

1. A tilting device for an electric furnace body, characterized in that: It includes an electric furnace, an electric furnace rocking frame, a plunger cylinder, a concrete foundation, and a rocking frame platform. The bottom of the electric furnace is mounted on the electric furnace rocking frame, and the electric furnace rocking frame is mounted on the rocking frame platform. The lower part of the single-plunger cylinder is connected to the concrete foundation via a hinge trunnion, and the upper part of the single-plunger cylinder is connected to the electric furnace via a hinge trunnion.

2. The electric furnace body tilting device according to claim 1, characterized in that: The plunger cylinder is located on one side of the electric furnace.

3. The electric furnace body tilting device according to claim 1, characterized in that: The electric furnace body tilting device also includes a hydraulic control system, which includes an automatic control unit and a manual control unit, respectively connected to the plunger cylinder.

4. The electric furnace body tilting device according to claim 3, characterized in that: The automatic control unit includes a first high-pressure ball valve, a second high-pressure ball valve, a third high-pressure ball valve, a proportional directional valve, a locking plug, a plug cover, and a solenoid ball valve.

5. The electric furnace body tilting device according to claim 4, characterized in that: The hydraulic pump station delivers pressurized oil via the oil inlet P, which is connected to the P port of the proportional directional valve via the first high-pressure ball valve. The T port of the proportional directional valve is connected to the return oil port T of the hydraulic pump station via the second high-pressure ball valve. The proportional directional valve port is divided into two oil circuits via the third high-pressure ball valve. One circuit is connected to the A port of the locking plug, and then to the oil port B of the plunger cylinder via the B port of the locking plug. The other circuit is connected to the P port of the solenoid ball valve and the spring cavity of the locking plug via the plug cover plate. The T port of the solenoid ball valve is connected to the drain port L, and the L port is connected to the oil tank of the hydraulic pump station via a pipeline.

6. The electric furnace body tilting device according to claim 3, characterized in that: The manual control unit includes a manual directional valve, a hydraulic check valve, a fourth high-pressure ball valve, a fifth high-pressure ball valve, a sixth high-pressure ball valve, and a seventh high-pressure ball valve.

7. The electric furnace body tilting device according to claim 6, characterized in that: The P port of the hydraulic pump station's delivery pressure oil P is connected to the P port of the manual directional valve through the sixth high-pressure ball valve. The A port of the manual directional valve is connected to the A port of the hydraulically controlled check valve through the fourth high-pressure ball valve. The B port of the hydraulically controlled check valve is connected to the oil port B of the plunger cylinder. The control port P of the hydraulically controlled check valve is connected to the B port of the manual directional valve through the fifth high-pressure ball valve. The T port of the manual directional valve is connected to the T port of the hydraulic pump station's oil tank through the seventh high-pressure ball valve. The drain port L of the hydraulically controlled check valve is connected to the oil tank of the hydraulic pump station via a pipeline.

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