Hydraulic hoist capable of black start unlocking and closing

Abstract

The present application relates to a kind of black start unlocking closed hydraulic hoist.The present application aims to provide a kind of simple structure, safe and reliable black start unlocking closed hydraulic hoist under no electricity condition.The technical scheme of the present application is: a kind of black start unlocking closed hydraulic hoist, characterized by: locking mechanism is controlled by locking cylinder action, the left (A) end side chamber of the locking cylinder is respectively connected with the pressure oil circuit of the lower chamber of the hydraulic cylinder through ball valve I or solenoid valve I, the right (B) end side chamber oil liquid is returned to oil tank through reversing valve, to realize the operation of unlocking;The rod cavity of hydraulic cylinder is connected with the pressure oil circuit of electro-hydraulic control system through one-way throttle valve and two-way cartridge valve throttling, the function of two-way cartridge valve is controlled by solenoid valve II or ball valve II, the rodless cavity of the hydraulic cylinder is connected with oil supplement tank and main oil tank through liquid filling valve.The present application is suitable for water conservancy and hydropower engineering and similar fields.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of hydraulic hoist that can be black start unlocking closing. BACKGROUND

[0002] The existing hydraulic hoist, to ensure the possibility of gate opening, locking device is provided, before gate closing, need to be unlocked, then closing operation, operation must be powered and control power, through motor pump group provides power, control valve group operation hydraulic hoist unlocking, then relationship closing gate.However, in the face of earthquake, water flooded plant etc. Extreme special circumstances, easy to cause power failure, then cannot operate gate closing, lead to difficult to avoid accident expansion, there is certain influence to the safe operation of power station. SUMMARY

[0003] The technical problem to be solved by the present application is: for the above problems, provide a kind of structure simple, safe and reliable can be black start unlocking closing hydraulic hoist in no electricity.

[0004] The technical scheme adopted by the present application is: a kind of hydraulic hoist that can be black start unlocking closing, with the hydraulic cylinder of connecting gate and the hydraulic control system of controlling the action of hydraulic cylinder, the locking mechanism capable of locking the piston rod in the hydraulic cylinder is installed on the hydraulic cylinder, characterized in that: the locking mechanism is controlled by locking cylinder, the left (A) end side chamber of the locking cylinder is respectively communicated with the pressure oil circuit of the lower cavity of the hydraulic cylinder through ball valve I or electromagnetic valve I, and the right (B) end side chamber oil liquid is returned to the oil tank through the reversing valve, to realize the unlocking operation;

[0005] The rod cavity of the hydraulic cylinder is connected with the pressure oil circuit of electro-hydraulic control system through one-way throttling valve and two-way cartridge valve after throttling, and the function of two-way cartridge valve is controlled by electromagnetic valve II or ball valve II, and the rodless cavity of the hydraulic cylinder is connected with oil supplement tank and main oil tank through liquid filling valve.

[0006] The locking mechanism has a locking body and a locking rod, wherein the locking rod is coaxially connected to the piston rod in the rodless cavity of the hydraulic cylinder, and a locking seat is formed at the end of the locking rod away from the piston rod.

[0007] The locking body is arranged at the end of the rodless cavity of the hydraulic cylinder, and the length direction of the locking body is perpendicular to the axial direction of the locking rod, a small circular hole and a large circular hole are formed in the length direction of the locking body, the small circular hole and the large circular hole form a pear-shaped hole in combination.

[0008] The end of the small circular hole in the length direction of the locking body is connected with the piston rod of the B end of the locking cylinder, and the end of the large circular hole in the length direction of the locking body is connected with a compensation rod, and the compensation rod is inserted into a compensation sleeve connected to the hydraulic cylinder.

[0009] The locking cylinder is provided with a bidirectional piston rod

[0010] The rodless cavity end of the hydraulic cylinder is provided with a stroke monitoring device for acquiring the position of the locking rod, and the stroke monitoring device is connected to the control unit of the hydraulic control system.

[0011] The beneficial effects of the present application are: in the embodiment, when the system is in a normal working state, the hydraulic system can control the hydraulic valve group to normally operate the opening and closing of the hydraulic cylinder and the unlocking and locking of the locking cylinder; when the system loses power and leaves the direct current control power supply working condition, the control gate is automatically closed, the electromagnetic valve I is operated, the locking mechanism on the hydraulic cylinder is unlocked, and then the electromagnetic valve II is operated, and the gate is closed by gravity; when the system loses all power, i.e. in the black start state, the ball valve I is operated in sequence, the locking mechanism of the hydraulic cylinder is unlocked, the ball valve II is operated, and the gate is closed by gravity, realizing the fastest response to the operation requirement and reducing the loss in extreme special conditions such as earthquake and flooded plant. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a schematic diagram of the principle of the embodiment.

[0013] Figure 2 It is a schematic diagram of the locking mechanism in the embodiment.

[0014] Figure 3 It is Figure 2 A-A sectional view.

[0015] In the figure: 1-1, locking rod; 1-2, compensation rod; 1-3, locking body; 1-4, locking cylinder piston rod; 1-5, stroke monitoring device; 2-1, locking cylinder; 2-2, ball valve I; 2-3, electromagnetic valve I; 3-1, oil compensation tank; 3-2, one-way throttle valve; 3-3, electromagnetic valve II; 3-4, ball valve II; 3-5, two-way cartridge valve; 3-6, liquid filling valve. DETAILED DESCRIPTION

[0016] The embodiment is a hydraulic hoist capable of black start unlocking and closing, which has a hydraulic cylinder connected to a gate and a hydraulic control system for controlling the action of the hydraulic cylinder, and a locking mechanism capable of locking the piston rod in the hydraulic cylinder is installed on the hydraulic cylinder.

[0017] The locking mechanism in this example has a locking body and a locking rod, wherein the locking rod is coaxially connected to the piston rod in the rodless cavity of the hydraulic cylinder, and the end of the locking rod away from the piston rod is provided with a locking seat; the locking body is arranged at the end position of the rodless cavity of the hydraulic cylinder, and the length direction of the locking body is perpendicular to the axial direction of the locking rod, and a pear-shaped hole formed by a large circular hole and a small circular hole is arranged on the locking body along the length direction of the locking body, wherein the small circular hole is used for allowing the locking rod to pass through and limiting the locking seat, and the large circular hole is used for allowing the locking seat to pass through, and the locking rod can move back and forth along the length direction of the locking body in the pear-shaped hole.

[0018] In this embodiment, a locking cylinder is arranged outside the hydraulic cylinder, and the two ends of the locking cylinder are respectively named as A end and B end. The piston rod of the B end of the locking cylinder is directly connected to the locking body, and the piston rod of the locking cylinder is parallel to the length direction of the locking body and connected to the clamping groove in the length direction of the locking body. In this example, the large circular hole in the length direction of the locking body is connected to a compensation rod, and the compensation rod is inserted into a compensation sleeve connected to the hydraulic cylinder. By arranging the compensation rod, the volume of the upper cavity remains unchanged when the locking body is operated, thereby avoiding the generation of additional load. Meanwhile, the locking cylinder is provided with a bidirectional piston rod, so that the locking cylinder avoids the generation of additional load due to temperature change.

[0019] In this example, a stroke monitoring device for obtaining the stroke of the piston rod of the locking cylinder is arranged at the end of the rodless cavity of the hydraulic cylinder, and a stroke switch for monitoring the position of the locking block is arranged outside the compensation rod. The stroke monitoring device and the stroke switch are connected to the control unit of the hydraulic control system, so as to control the actions of the locking cylinder and the hydraulic opening and closing machine.

[0020] In this example, the locking rod of the hydraulic cylinder is provided with a working stroke L, which meets the needs of the piston rod of the hydraulic cylinder to slide downward when the system is unlocked.

[0021] In this embodiment, the A end side cavity of the locking cylinder is connected to the pressure pipeline of the hydraulic control system through the parallel pipeline of the ball valve I and the electromagnetic valve I. The rod cavity of the hydraulic cylinder is connected to the pressure oil return circuit of the electro-hydraulic control system after being throttled by the one-way throttle and the two-way cartridge valve, and the function of the two-way cartridge valve is controlled by the electromagnetic valve II or the ball valve II. The rodless cavity of the hydraulic cylinder is returned to the oil supplement tank and the main oil tank through the liquid filling valve.

[0022] The working principle of this embodiment is as follows: when the gate is in the fully open position, the stroke monitoring device monitors that the piston and the locking rod of the hydraulic cylinder slide a certain distance, and then the oil pump is started according to the gate opening program to return to the fully open position, so as to ensure that there is an unlocking operation stroke.

[0023] When the gate needs to be automatically closed, the electromagnet I is electrified, the locking cylinder is unlocked to the position, the electromagnet I is de-energized, the electromagnetic valve II is electrified, the oil in the rod cavity of the hydraulic cylinder enters the rodless cavity of the hydraulic cylinder after being throttled by the one-way throttle and the two-way cartridge valve to control the closing speed of the gate, and at the same time, the oil in the oil supplement tank enters the rodless cavity of the hydraulic cylinder through the liquid control liquid filling valve, the gate is closed to the position, and the electromagnet is de-energized.

[0024] When the gate needs to be manually closed in the emergency power failure state, manually open the ball valve I, and then lock the oil cylinder to the position, manually close the ball valve I, and then manually open the ball valve II. The oil in the rod cavity of the hydraulic cylinder enters the rodless cavity of the hydraulic cylinder through the one-way throttling valve and the two-way cartridge valve to adjust the door closing speed, and the oil in the oil tank enters the rodless cavity of the hydraulic cylinder through the hydraulic control liquid valve to supplement the oil. The gate is closed to the position.

[0025] Of course, the above description is not a limitation of the present application, and the present application is not limited to the above examples. Within the scope of the present application, changes, additions or substitutions made by ordinary skilled in the art should be within the scope of the present application.

Claims

1. A hydraulic hoist capable of black start unlocking and closing, comprising a hydraulic cylinder connected to a gate and a hydraulic control system for controlling the operation of the hydraulic cylinder, a locking mechanism capable of locking a piston rod in the hydraulic cylinder is installed on the hydraulic cylinder, characterized in that: The locking mechanism is controlled by a locking cylinder, and the A end side chamber of the locking cylinder is connected with the pressure oil circuit of the lower chamber of the hydraulic cylinder through ball valve I and electromagnetic valve I respectively, and the B end side chamber oil is returned to the tank through the reversing valve; The rod cavity of the hydraulic cylinder is connected with the pressure oil circuit of the electro-hydraulic control system through the one-way throttle valve and the two-way cartridge valve after throttling, and the function of the two-way cartridge valve is controlled by electromagnetic valve II or ball valve II; the rodless cavity of the hydraulic cylinder is connected with the oil supplement tank and the main oil tank through the liquid filling valve; The locking mechanism has a locking body and a locking rod, wherein the locking rod is coaxially connected with the piston rod in the rodless cavity of the hydraulic cylinder, and the end of the locking rod away from the piston rod is provided with a locking seat; The locking body is arranged at the end of the rodless cavity of the hydraulic cylinder, and the length direction of the locking body is perpendicular to the axial direction of the locking rod; a small hole for the locking rod to pass through the limiting locking seat through hole and a large hole for the locking seat to pass through are arranged on the locking body along the length direction of the locking body, and the small hole and the large hole combine to form a pear-shaped hole, so as to realize locking and unlocking; The end of the small hole of the length direction of the locking body is directly connected with the piston rod of the B end of the locking cylinder through the clamping slot, and the end of the large hole of the length direction of the locking body is connected with the compensation rod, and the compensation rod is inserted into the compensation sleeve connected with the hydraulic cylinder; The end of the rodless cavity of the hydraulic cylinder is provided with a stroke monitoring device for obtaining the stroke of the piston rod of the locking cylinder, and a stroke switch for monitoring the position of the locking block is arranged on the outside of the compensation rod; the stroke monitoring device and the stroke switch are connected with the control unit of the hydraulic control system, and the action of the locking cylinder and the hydraulic gate opener is controlled; When the gate is in the full open position, after the stroke detection device detects that the hydraulic cylinder piston and the locking rod slide a certain distance, the oil pump is started according to the gate opening program, and the gate is returned to the full open position, so as to ensure that there is a unlocking operation stroke; When the gate needs to be automatically closed, the electromagnet I is energized, the locking cylinder is unlocked to the position, the electromagnet I is de-energized, the electromagnetic valve II is energized, the oil in the rod cavity of the hydraulic cylinder enters the rodless cavity of the hydraulic cylinder through the one-way throttle valve and the two-way cartridge valve after adjusting the door closing speed, and at the same time, the oil in the oil supplement tank supplements the oil in the rodless cavity of the hydraulic cylinder through the liquid control filling valve, and the gate is closed to the position, and the electromagnet is de-energized; When the gate needs to be manually closed in the emergency power failure state, the ball valve I is manually opened, the locking cylinder is unlocked to the position, the ball valve I is manually closed, and then the ball valve II is manually opened, the oil in the rod cavity of the hydraulic cylinder enters the rodless cavity of the hydraulic cylinder through the one-way throttle valve and the two-way cartridge valve after adjusting the door closing speed, and at the same time, the oil in the oil supplement tank supplements the oil in the rodless cavity of the hydraulic cylinder through the liquid control filling valve, and the gate is closed to the position; The locking cylinder is provided with a two-way piston rod; The system pressure oil is taken from the lower chamber of the hydraulic cylinder, and no additional power source is needed.

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