CN201059298Y

CN201059298Y - Gate valve hydraulic driving system

Info

Publication number: CN201059298Y
Application number: CNU2007200400758U
Authority: CN
Inventors: 刘建
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-06-26
Filing date: 2007-06-26
Publication date: 2008-05-14
Anticipated expiration: 2017-06-26

Abstract

The utility model relates to a fluid power system for a gate valve, which is used for fluid-pressure drive of gate valves of mine and other underground dewatering pumps. The utility model comprises an oil tank, an oil pump driven by a motor, an electromagnetic directional valve and a piston oil cylinder which are connected in turn with each other through a pipe, wherein, a piston rod of the oil cylinder is connected with a gate valve. Opening and closing operations of the gate valve are driven by piston movement, and return oil of the oil cylinder goes back to the oil tank through an oil return pipe of the electromagnetic directional valve, thereby the utility model has the advantages of remote control of the opening and closing operations of the gate valve through the electromagnetic directional valve, large opening force, and safety and reliability. Moreover, the utility model is also provided with a spare hand-operated direction valve and a hand-operated oil supply system, and normal opening and closing operations of the gate valve can be guaranteed in the case of power failure.

Description

The gate valve hydraulic driving system

Technical field

The utility model relates to a kind of hydraulic driving system of gate valve, is used for the hydraulic driving of drainage underground pump gate valves such as mine.

Background technique

At present, the down-hole pump house is the hinge of drainage system under the coal mine, is bearing the function that the infiltration of downhole production waste water and mine is discharged to ground, is the important step of guaranteeing the down-hole proper functioning.The gate valve that occasions such as drainage underground pump house are used mostly is the supporting gate valve of high pressure high-lift pump, and the keying strength of valve is bigger, and the manual push-and-pull gate valve that tradition falls behind can not satisfy the needs of modern production; Bigger owing to down-hole humidity again, and be the particular surroundings that contains gas, very strict to safety requirement, electric gate valve should not use because of poor stability.

Summary of the invention

The purpose of this utility model provides a kind of gate valve hydraulic driving system that is used for the gate valve automatic on-off, makes the keying of gate valve easy to operate, stablizes safely.

The hydraulic driving system of this gate valve contains large tank, motor-operated oil pump, selector valve and the ram cylinder that links to each other successively with pipeline, the piston rod of oil cylinder and gate valve interlock, motion by piston drives the gate valve keying, the oil return of oil cylinder is returned large tank by the return line of selector valve, and said selector valve is a solenoid directional control valve.

System is provided with hand-operated direction valve simultaneously, and is provided with hand oil pump and little fuel tank, and hand oil pump is connected between the filler opening of little fuel tank and hand-operated direction valve, and the return line of hand-operated direction valve returns little fuel tank.

At some in particular cases, can enable the manual reverse of direction operation as situations such as needs execute-in-places, must enable the hand-operated direction valve commutation and situation about having a power failure is next, the oil that extracts little fuel tank with hand oil pump is to oil cylinder one end fuel feeding subsequently, and the oil return of the oil cylinder the other end is returned little fuel tank by hand-operated direction valve or feed the return line of large tank.

System is provided with a plurality of working cells that comprise oil cylinder, selector valve, the in-line of the selector valve of each unit is in parallel or be connected on the fuel feeding house steward, the return line of each selector valve is in parallel or be connected on the oil return house steward, the piston of each oil cylinder respectively with separately gate valve interlock.

System is provided with the accumulator that is connected with the fuel feeding house steward, when system increases system pressure decline suddenly with oil mass, enables accumulator to fuel feeding house steward fuel feeding.

System is provided with standby motor, oil pump and unloading overflow valve, and unloading overflow valve is provided with the spill pipe that returns fuel tank; Spill pipe is provided with cooler.

This hydraulic driving system can be applied to down-hole automatic on-off drainage valve by the unlatching and the closing motion of solenoid directional control valve telecontrol gate valve, and it is big to start strength, safety and steady.Be provided with standby hand-operated direction valve and manual oil supply system, can guarantee that under power-off condition gate valve normally opens and closes.Energy automatic deloading under the situation of overflow, energy consumption is low, and near no power consumption overflow, and noise is little.Be provided with dual-motor, two oil pump, two fuel feeding and double overflow system, the equipment that guaranteed is breaking down or can be normally to system's fuel feeding during maintenance repair, each working cell under any circumstance can both run well, and emergent performance, working efficiency and the Security of system are improved greatly.

Description of drawings

Fig. 1 is the structural representation of this gate valve hydraulic driving system.

Fig. 2 is the structure enlarged view of oil cylinder working cell.

Among the figure, 1-1,1-1 '-thick oil purifier, 1-2,1-2 '-smart oil purifier, 1-3,1-3-oil return oil purifier, 2-1,2-2,2-3,2-4,2-5,2-6-high-pressure ball valve, 2-7-one-way valve, 3,3 '-electric oil pump, 4,4 '-unloading overflow valve, 5-large tank, 6-accumulator, 7-fuel feeding house steward, the little fuel tank of 8-, 9-solenoid directional control valve, 10-hand-operated direction valve, 10-1-hand-operated direction valve handle, the 11-oil cylinder, 11-1-piston, 12-oil return house steward, the 13-exhaust-valve, the 14-cooler, 15-hand oil pump, 15-1-hand oil pump handle.

Embodiment

Structure and working procedure below in conjunction with the embodiment of description of drawings the utility model hydraulic system.

Each frame of broken lines is represented a working cell among Fig. 1, a working cell of each drainage valve of down-hole and native system is to corresponding, it is corresponding one by one that present embodiment is provided with n each gate valve of working cell and down-hole, four working cells of only drawing among Fig. 1, all the other are expressed as total total n working cell with ellipsis.

As shown in Figure 1, actuating motor M, it is as follows that the oil of fuel tank 5 filters the back stream through thick oil purifier 1-1: the preceding cylinder of the A chamber, P chamber of high-pressure ball valve 2-2 → pump 3 → smart oil purifier 1-2 → high-pressure ball valve 2-3 → fuel feeding house steward 7 (it is oil-filled to supply with accumulator simultaneously) → high-pressure ball valve 2-5 → one-way valve 2-7 → solenoid directional control valve 9 or B chamber → enter oil cylinder 11 or back cylinder (oil cylinder withdrawal or stretch out, drive the high pressure sluice valve unlatching or close); Oil cylinder is discharged the B chamber of oil (being oil return) → solenoid valve 9 or the T chamber → high-pressure ball valve 2-6 of A chamber → solenoid directional control valve 9 → enter oil return house steward 12 → oil return oil purifier 1-3 → fuel tank 5.

When piston 11-1 moves to end points in oil cylinder, then the unlatching of gate valve (or closing) process is finished, and system finishes the one action process, termination of pumping, and that treats gate valve next time closes (or unlatching) instruction.

As replacing solenoid directional control valve 9 with hand-operated direction valve 10, then by operating grip 10-1 commutation, still extract the oil of fuel tank 5 by electric oil pump 3, through fuel feeding house steward 7, high-pressure ball valve 2-5, one-way valve 2-7 enter the A chamber of the P chamber of hand-operated direction valve 10 → enter manually operated valve 10 or B chamber → enter oil cylinder 11 preceding cylinder or after cylinder (oil cylinder withdrawal or stretch out, drive high pressure sluice valve and open or close); Oil cylinder is discharged the B chamber of oil (oil return) → hand-operated direction valve 10 or the T chamber → high-pressure ball valve 2-6 of A chamber → hand-operated direction valve 10 → oil return house steward 12 → oil return oil purifier oil oil purifier 1-3 → large tank 5.

Have a power failure, fuel supply line leakage of oil or pumping plant can't fuel feeding etc. in particular cases, native system can adopt manually-operable to start, the handle 10-1 of hand-operated direction valve 10 is pushed into the position of required commutation, shake the handle 15-1 of hand oil pump 15, hand pump 10 sends into before the oil cylinder of the A chamber of the P chamber of selector valve 10 → enter manually operated valve 10 or B chamber → enter cylinder or back cylinder (oil cylinder withdrawal or stretch out, drive high pressure sluice valve and open or cut out) after little fuel tank 8 oil suctions in working cell; The B chamber of oil cylinder oil return → hand-operated direction valve 10 or the T chamber of A chamber → hand-operated direction valve 10 → little fuel tank 8.

When system oil pressure was higher than setting pressure, then the off-load flow valve 4 of overflowing was opened, and part oil returns large tank 5 by unloading overflow valve 4 overflows through high-pressure ball valve 2-1, cooler 14, was depressurized to setting pressure when following until system unloaded, and relief valve 4 quits work.

Accumulator repairing process: when move simultaneously a plurality of working cells of system, when system descended system pressure because of increasing suddenly with oil mass, the oil in the accumulator 6 entered fuel feeding house steward 7 by high-pressure ball valve 2-4 simultaneously and replenish fuel feeding to the working cell.

Native system be provided with standby electric oil pump 3 ', thick oil purifier 1-1 ', smart oil purifier 1-2 ', unloading overflow valve 4 ', to guarantee system safety operation.

Claims

1. gate valve hydraulic driving system, contain the large tank, motor-operated oil pump, selector valve and the ram cylinder that link to each other successively with pipeline, it is characterized in that the piston and the gate valve interlock of oil cylinder, the oil return of oil cylinder is returned fuel tank by the return line of selector valve, and said selector valve is a solenoid directional control valve.

2. gate valve hydraulic driving system according to claim 1, it is characterized in that being provided with hand-operated direction valve, and be provided with hand oil pump and little fuel tank, hand oil pump is connected between the filler opening of little fuel tank and hand-operated direction valve, and the return line of hand-operated direction valve returns little fuel tank or feeds the return line of large tank.

3. gate valve hydraulic driving system according to claim 2, it is characterized in that being provided with a plurality of working cells that comprise oil cylinder, selector valve, the in-line of each selector valve is in parallel or be connected on the fuel feeding house steward, the return line of each selector valve is in parallel or be connected on the oil return house steward, the piston of each oil cylinder respectively with separately gate valve interlock.

4. gate valve hydraulic driving system according to claim 4 is characterized in that being provided with the accumulator that is connected with the fuel feeding house steward.

5. according to claim 1 or 2 or 3 or 4 described gate valve hydraulic driving systems, it is characterized in that the export pipeline of oil pump is provided with unloading overflow valve, unloading overflow valve is provided with the spill pipe that returns large tank; Spill pipe is provided with cooler.

6. gate valve hydraulic driving system according to claim 5 is characterized in that system is provided with standby oil pump that is not connected to motor and unloading overflow valve simultaneously.