Emergency operation method based on crane winch

Abstract

According to the emergency operation method based on the crane winch, a three-way ball valve is switched to an electric emergency state, so that an emergency electromagnetic valve is powered on, hydraulic oil of a hydraulic oil tank is connected to the winch through the emergency electromagnetic valve, braking of the winch is released, the winch drives a winch load heavy object to descend, and the descending speed is controlled through a throttling valve; if the electric emergency state cannot be started, a manual emergency state is switched through the three-way ball valve, the manual pump is manually opened, hydraulic oil of the hydraulic oil tank is communicated with the winch through the manual pump, brake of the winch is released, the winch drives the winch load weight to descend, and meanwhile the descending speed is controlled through the throttling valve; in this way, under the dual emergency states of electric emergency and manual emergency, it is ensured that the winch can be rapidly controlled to lower the loaded heavy object, and therefore potential safety hazards caused by accidental mistaken touch operation to operators on site are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of cranes, and in particular to an emergency operation method based on a crane winch. Background Art

[0002] Pile-encircling slewing cranes are used on offshore platforms to lift cargo for transportation due to their small platform space occupation, compact structure, and large lifting capacity. Pile-encircling slewing cranes mainly include a base, a slewing platform, a lifting mechanism, and a hydraulic system. The slewing platform is rotatably arranged on the base, and the lifting mechanism is arranged on the slewing platform. Usually, in small pile-encircling slewing cranes, a slewing bearing is used to connect the slewing platform and the base, while in large pile-encircling slewing cranes, the slewing platform and the base are connected by rollers.

[0003] In the crane, an emergency operating system needs to be set according to the operation requirements to avoid suspending the operation in special circumstances, so as to ensure safety. For example, the patent document with Chinese patent number 201721645201.2 and announcement date 2018.07.03 discloses a crane emergency operating system, including a PLC automatic control system, an emergency manual system, a luffing system for driving a luffing winch, a main lifting system for driving a main lifting winch, a secondary main lifting system for driving a secondary main lifting winch, a slewing system for driving a slewing mechanism, and a main motor. The main motor drives the main pump, which is connected to the hydraulic oil tank. The main oil supply pipeline formed at the output end of the main pump supplies oil to the luffing system, the main lifting system, the auxiliary main lifting system and the slewing system respectively through a hydraulically controlled proportional multi-way valve. The PLC automatic control system controls the hydraulically controlled proportional multi-way valve through an electric proportional pressure reducing valve group; the emergency manual system includes an emergency pump group and a hydraulic handle connected to the hydraulic oil tank. The emergency pump group controls the luffing system, the main lifting system, the auxiliary main lifting system and the slewing system through the hydraulic handle.

[0004] The emergency pump group in the above document controls the multi-way valve between the hydraulic handle and the electric proportional pressure reducing valve through the seventh shuttle valve, thereby supplying oil to the motor. However, during the operation, when the emergency control winch lowers the load to the ground, the system connection is complicated and the response is slow. In this way, the winch is not controlled in time to lower the load, and other personnel on site may accidentally trigger the operation, thereby posing a safety hazard to the operators on site. Summary of the invention

[0005] The purpose of the present invention is to provide an emergency operation method based on a crane winch, which can quickly control the winch to lower the load heavy objects by electric or manual emergency operation, has a fast response speed, meets the requirements of on-site operations, has a simple structure, and has low use cost.

[0006] To achieve the above object, the present invention provides an emergency operation method based on a crane winch, comprising the following steps: When the motor pump group connected to the winch in the load state stops working, S1 opens the ball valve 1 connected to the hydraulic oil tank, the ball valve 2 connected to the three-way ball valve, the ball valve 3 connected to the second brake, the ball valve 4 connected to the throttling oil circuit and the ball valve 5 in the throttling oil circuit, and closes the ball valve 6 connected to the winch at the same time; S2 opens the throttle valve in the throttle oil circuit, turns the knob of the throttle valve to the minimum value, enters the electric emergency state, steps S3~S4; if the electric emergency state cannot be started, enters the manual emergency state, and enters steps S5~S6; S3 turns the three-way ball valve to the electric emergency state, starts the electric emergency release pump, energizes the emergency solenoid valve, and then adjusts the knob of the throttle valve to control the descending speed of the load on the winch; S4 When the load on the winch is lowered to the ground, the emergency solenoid valve is closed, so that the emergency solenoid valve group loses power, and the electric emergency state ends and exits; S5 turns the three-way ball valve to the manual emergency state, opens the manual pump, and then adjusts the knob of the throttle valve to control the descending speed of the load on the winch; S6 When the load on the winch is lowered to the ground, the manual pump is turned off and the manual emergency state ends.

[0007] The above setting can prepare for the emergency operation oil circuit by closing and opening different ball valves, and at the same time can open the second brake, release the brake of the winch by the second brake, and then turn on the electric emergency state through the three-way ball valve to energize the emergency solenoid valve, so that the hydraulic oil in the hydraulic oil tank is connected to the winch through the emergency solenoid valve, release the brake of the winch, so that the winch drives the winch load to descend, and the descent speed is controlled by the throttle valve. If the electric emergency state cannot be started, the three-way ball valve can be turned on to the manual emergency state, and the manual pump can be opened manually, so that the hydraulic oil in the hydraulic oil tank is connected to the winch through the manual pump, and then the brake of the winch is released, so that the winch drives the winch load to descend, and the descent speed is controlled by the throttle valve. In this way, in the dual emergency states of electric emergency and manual emergency, it is ensured that the winch can be quickly controlled to lower the load, thereby avoiding accidental misoperation and causing safety hazards to the operators on site.

[0008] Furthermore, one end of the ball valve 1 is connected to the hydraulic oil tank, and the other end of the ball valve 1 is connected to the electric emergency release pump group and the manual pump respectively.

[0009] The above arrangement enables the hydraulic oil in the hydraulic oil tank to enter the electric emergency release pump unit and the manual pump through the ball valve 1 after opening the ball valve 1.

[0010] Furthermore, the P valve port of the emergency solenoid valve is connected to the electric emergency release pump, the A valve port and the C valve port of the emergency solenoid valve are both connected to the T valve port of the multi-way valve, the T valve port of the multi-way valve is connected to one end of ball valve three, the other end of ball valve three is connected to the second brake, and the B valve port of the emergency solenoid valve is connected to the three-way ball valve.

[0011] The above arrangement enables the hydraulic oil to flow into the multi-way valve through the emergency solenoid valve, and then control the second brake through the ball valve three to release the brake on the winch.

[0012] Furthermore, the manual pump is connected to a three-way ball valve.

[0013] The above arrangement enables the hydraulic oil to enter the winch after passing through the three-way ball valve.

[0014] Furthermore, one end of the ball valve four is respectively connected to the D valve port of the multi-way valve and one end of the reversing valve, the other end of the ball valve four is respectively connected to one end of the throttling oil circuit and the E port of the motor connected to the winch, the other end of the throttling oil circuit is connected to one end of the three-way interface, the other end of the three-way interface is connected to the F port of the motor, the third end of the three-way interface is connected to one end of the shuttle valve, the other end of the shuttle valve is connected to one end of the reversing valve, and the other end of the reversing valve is connected to the first brake.

[0015] The above arrangement enables, when the hydraulic oil drives the motor to rotate, the hydraulic oil flowing through the three-way interface simultaneously pushes the shuttle valve, and then communicates with the reversing valve, causing the reversing valve to reverse, so that the first brake releases the winch brake, thereby realizing the rotation of the winch and driving the load to be lowered.

[0016] Furthermore, the throttling oil circuit includes a throttle valve, a non-adjustable flow valve and a ball valve five, which are connected in series. The non-adjustable flow valve is connected to one end of the three-way interface, and the ball valve five is respectively connected to the motor E port and the other end of the ball valve four.

[0017] The above arrangement can adjust the amount of hydraulic oil passing through the throttling oil circuit through the throttle valve, thereby controlling the descending speed of the load. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of local hydraulic connection in the present invention.

[0019] Figure 2 This is another partial hydraulic connection schematic diagram in the present invention. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] like Figure 1-2As shown, an emergency operation method based on a crane winch includes a hydraulic oil tank 1, a ball valve T17, an electric emergency release pump H22, an emergency solenoid valve T17, a three-way ball valve T15, a manual pump H18, a multi-way valve H19, a first brake 2, a second brake 3, a throttling oil circuit 4, a reversing valve 5 and a winch 6. One end of the ball valve H17 is connected to the hydraulic oil tank 1, and the other end of the ball valve H17 is respectively connected to one end of the electric emergency release pump H22 and one end of the manual pump H18. In this way, after opening the ball valve H17, the hydraulic oil in the hydraulic oil tank 1 can enter the electric emergency release pump group H22 and the manual pump H18 through the ball valve H17.

[0022] The P valve port of the emergency solenoid valve T17 is connected to the other end of the electric emergency release pump H22, the A valve port and the C valve port of the emergency solenoid valve T17 are both connected to the T valve port of the multi-way valve H19, the T valve port of the multi-way valve H19 is connected to one end of the ball valve three T16, the other end of the ball valve three T16 is connected to the second brake 3, and the B valve port of the emergency solenoid valve T17 is connected to the three-way ball valve T15, so that the hydraulic oil in the hydraulic oil tank 1 flows into the multi-way valve H19, and then by controlling the flow of the hydraulic oil flowing through the ball valve three T16, the flow of the hydraulic oil to the second brake 3 can be controlled, and then the hydraulic oil pressure reaching the second brake 3 is controlled, so that the second brake 3 releases the brake on the winch 6.

[0023] The other end of the manual pump H18 is connected to the three-way ball valve T15, one end of the ball valve BV2 / 1 is respectively connected to the D valve port of the multi-way valve H19 and one end of the reversing valve 5, the other end of the ball valve BV2 / 1 is respectively connected to one end of the throttling oil circuit 4 and the E port of the motor 7 connected to the winch 6, the other end of the throttling oil circuit 4 is connected to one end of the three-way interface A02, the other end of the three-way interface A02 is connected to the F port of the motor, the third end of the three-way interface A02 is connected to one end of the shuttle valve 8, the other end of the shuttle valve 8 is connected to one end of the reversing valve 5, and the other end of the reversing valve 5 is connected to the first brake 2. In this way, when the hydraulic oil drives the motor 7 to rotate, the hydraulic oil flowing through the three-way interface A02 also pushes the shuttle valve 8, and then communicates with the reversing valve 5, so that the reversing valve 5 is reversed, so that the first brake 2 releases the brake of the winch 6, thereby realizing the rotation of the winch 6 and driving the load to be lowered. In this embodiment, two reversing valves 5 are provided.

[0024] The throttling oil circuit 4 includes a throttle valve NQ1, a non-adjustable flow valve BR1 and a ball valve five BV2 / 2, which are connected in series, the non-adjustable flow valve BR1 is connected to one end of the three-way interface A02, and the ball valve five BV2 / 2 is respectively connected to the motor 7E port and the other end of the ball valve four BV2 / 1, so that the amount of hydraulic oil passing through the throttle oil circuit 4 can be adjusted by the throttle valve NQ1, thereby controlling the descending speed of the load weight.

[0025] In this embodiment, a one-way valve T18 and a pressure control valve T12 are provided between the T valve port of the multi-way valve H19 and one end of the ball valve three T16. In this way, after entering the electric emergency state and the emergency solenoid valve T17 is energized, the hydraulic oil flowing through the ball valve three T16 flows to the one-way valve T18, so that the oil pressure of the one-way valve T18 is greater than the oil pressure of the pressure control valve T12, thereby making the hydraulic oil flow from the emergency solenoid valve T17 to the multi-way valve H19 larger.

[0026] The following specific steps are also included: When the motor pump group connected to the winch in the load state stops working, S1 opens the ball valve 1 H17 connected to the hydraulic oil tank 1, the ball valve 2 connected to the three-way ball valve T15, the ball valve 3 T16 connected to the second brake, the ball valve 4 BV2 / 1 connected to the throttling oil circuit 4 and the ball valve 5 BV2 / 2 in the throttling oil circuit, and closes the ball valve 6 AV1 connected to the winch at the same time; S2 opens the throttle valve NQ1 in the throttle oil circuit 4, turns the knob of the throttle valve NQ1 to the minimum value, enters the electric emergency state, steps S3~S4; if the electric emergency state cannot be started, enters the manual emergency state, enters steps S5~S6; S3 turns the three-way ball valve T15 to the electric emergency state, starts the electric emergency release pump H22, and energizes the emergency solenoid valve T17. The hydraulic oil flows through the three-way ball valve T15 through the valve port B, and then flows into the throttling oil circuit 4 and the motor E port. Then adjust the knob of the throttle valve NQ1 to control the flow of the hydraulic oil flowing through the throttling oil circuit 4. The hydraulic oil flowing out of the motor F port merges with the hydraulic oil flowing through the throttling oil circuit 4 and flows into the three-way interface A02, and then flows into the shuttle valve 8. After pushing the shuttle valve 8, it flows into the reversing valve 5 to be switched to the left cavity of the reversing valve 5, so that the control end of the first brake 2 has hydraulic oil entering. , so that the first brake 2 releases the brake, thereby causing the winch to rotate and drive the load to descend. After descending to the ground, adjust the knob of the throttle valve NQ1 to control the flow of the hydraulic oil flowing through the throttle oil circuit 4, so that the flow of the hydraulic oil in the throttle oil circuit 4 becomes smaller, so that the other oil circuit 9 connected to the throttle oil circuit 4 pushes the shuttle valve 8 to move and block the hydraulic oil flowing out of the three-way interface A02. At this time, the first brake 2 squeezes out the hydraulic oil in the first brake 2 under the action of the spring, and switches to the right cavity through the reversing valve 5 and then flows back to the hydraulic oil tank 1, thereby braking the winch after the load has descended; S4 When the load on the winch is lowered to the ground, the emergency solenoid valve T17 is closed, so that the emergency solenoid valve group loses power, and the electric emergency state ends; S5 puts the three-way ball valve T15 into the manual emergency state, manually opens the manual pump H18, and the hydraulic oil flows through the three-way ball valve T15 through the manual pump H18, and then flows into the throttling oil circuit 4 and the motor E port, and then adjusts the knob of the throttle valve NQ1 to control the flow of the hydraulic oil flowing through the throttling oil circuit 4. The hydraulic oil flowing out of the motor F port merges with the hydraulic oil flowing through the throttling oil circuit 4 and then flows into the three-way interface A02, and then flows into the shuttle valve 8, pushes the shuttle valve 8, and then flows into the reversing valve 5 to be switched to the left cavity of the reversing valve 5, so that the hydraulic oil enters the control end of the first brake 2, so that the first brake Car 2 releases the brake, so that the winch rotates and drives the load down. After it descends to the ground, adjust the knob of the throttle valve NQ1 to control the flow of the hydraulic oil flowing through the throttle oil circuit 4, so that the flow of the hydraulic oil in the throttle oil circuit 4 becomes smaller, so that another oil circuit 9 connected to the throttle oil circuit 4 pushes the shuttle valve 8 to move and block the hydraulic oil flowing out of the three-way interface A02. At this time, the first brake 2 squeezes out the hydraulic oil in the first brake 2 under the action of the spring, and switches to the right cavity through the reversing valve 5 and then flows back to the hydraulic oil tank 1, thereby braking the winch after the load has been lowered; S6 When the load on the winch is lowered to the ground, the manual pump H18 is manually closed and the manual emergency state ends.

[0027] The working principle of the present invention is as follows: the three-way ball valve T15 is turned to the electric emergency state, so that the emergency solenoid valve is energized, thereby connecting the hydraulic oil in the hydraulic oil tank to the winch through the emergency solenoid valve T17, releasing the brake of the winch, so that the winch drives the winch load to descend, and the descent speed is controlled by the throttle valve NQ1. If the electric emergency state cannot be started, the three-way ball valve T15 is turned to the manual emergency state, and the manual pump is opened manually, so that the hydraulic oil in the hydraulic oil tank is connected to the winch through the manual pump, and then the brake of the winch is released, so that the winch drives the winch load to descend, and the descent speed is controlled by the throttle valve NQ1 at the same time. In this way, in the dual emergency states of electric emergency and manual emergency, it is ensured that the winch can be quickly controlled to lower the load, thereby avoiding accidental misoperation to cause safety hazards to on-site operators.

Claims

1. A crane winch-based emergency operation method, characterized in that: The following steps are involved: When the motor pump group connected to the winch in the load state stops working, S1 opens the ball valve 1 connected to the hydraulic oil tank, the ball valve 2 connected to the three-way ball valve, the ball valve 3 connected to the second brake, the ball valve 4 connected to the throttling oil circuit and the ball valve 5 in the throttling oil circuit, and closes the ball valve 6 connected to the winch at the same time; S2 opens the throttle valve in the throttle oil circuit, turns the knob of the throttle valve to the minimum value, enters the electric emergency state, steps S3~S4; if the electric emergency state cannot be started, enters the manual emergency state, and enters steps S5~S6; S3 turns the three-way ball valve to the electric emergency state, starts the electric emergency release pump, energizes the emergency solenoid valve, and then adjusts the knob of the throttle valve to control the descending speed of the load on the winch; S4 When the load on the winch is lowered to the ground, the emergency solenoid valve is closed, so that the emergency solenoid valve group loses power, and the electric emergency state ends and exits; S5 puts the three-way ball valve into the manual emergency state, manually opens the manual pump, and then adjusts the knob of the throttle valve to control the descending speed of the load on the winch; S6 When the load on the winch is lowered to the ground, the manual pump is manually closed and the manual emergency state ends.

2. The crane winch emergency operation method according to claim 1, characterized in that: One end of the ball valve 1 is connected to the hydraulic oil tank, and the other end of the ball valve 1 is connected to the electric emergency release pump group and the manual pump respectively.

3. The crane winch emergency operation method according to claim 1, characterized in that: The P valve port of the emergency solenoid valve is connected to the electric emergency release pump, the A valve port and the C valve port of the emergency solenoid valve are both connected to the T valve port of the multi-way valve, the T valve port of the multi-way valve is connected to one end of ball valve three, the other end of ball valve three is connected to the second brake, and the B valve port of the emergency solenoid valve is connected to the three-way ball valve.

4. The crane winch emergency operation method according to claim 1, characterized in that: The manual pump is connected with a three-way ball valve.

5. The crane winch emergency operation method according to claim 1, characterized in that: One end of the ball valve four is respectively connected to the D valve port of the multi-way valve and one end of the reversing valve, the other end of the ball valve four is respectively connected to one end of the throttling oil circuit and the E port of the motor connected to the winch, the other end of the throttling oil circuit is connected to one end of the three-way interface, the other end of the three-way interface is connected to the F port of the motor, the third end of the three-way interface is connected to one end of the shuttle valve, the other end of the shuttle valve is connected to one end of the reversing valve, and the other end of the reversing valve is connected to the first brake.

6. The crane winch emergency operation method according to claim 1, characterized in that: The throttling oil circuit includes a throttle valve, a non-adjustable flow valve and a ball valve five, which are connected in series. The non-adjustable flow valve is connected to one end of the three-way interface, and the ball valve five is respectively connected to the motor E port and the other end of the ball valve four.

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