CN115822908A - Closed hydraulic drive double-cylinder high-efficiency hydraulic pressurizing water injection equipment - Google Patents

Abstract

The invention belongs to the technical field of oil exploitation equipment, and particularly relates to closed hydraulic drive double-cylinder high-efficiency hydraulic pressure boosting water injection equipment for water injection well pressure boosting, which is characterized in that a pressure boosting plunger sealing body is arranged in a pressure boosting cylinder barrel, and only the pressure boosting plunger sealing body can be replaced when a sealing groove is corroded and damaged; the left and right pressure cylinders are driven by the closed loop variable hydraulic pump assembly, so that hydraulic impact in the reversing process is eliminated; a flushing valve is arranged between the AB working pipelines and can replace cold and hot oil in the system; an oil discharge system is arranged, so that the influence of excessive transmission oil in the transmission cylinder barrel on the working stroke is avoided; the lubricating system is arranged, so that the service life of the sealing element is prolonged; the water leakage collecting box and the water leakage discharging system are arranged, so that leaked sewage is injected into a water inlet pipeline, and the pollution of leaked water to the environment is avoided; the oil tank adopts a closed oil tank; the invention has the advantages of long stroke, low stroke frequency, low noise, long service life, no impact, no pollution, high efficiency and environmental protection.

Description

Closed hydraulic drive double-cylinder high-efficiency hydraulic pressurizing water injection equipment

Technical Field

The invention belongs to the technical field of oil exploitation equipment, and particularly relates to closed hydraulic drive double-cylinder high-efficiency hydraulic pressure boosting water injection equipment for water injection well pressure boosting water injection.

Background

In order to ensure that the oil field has continuous and stable yield and improve the final recovery ratio of the oil field, most oil fields adopt a water injection development mode, and the water injection well injects water into an oil layer to supplement energy so as to keep the formation pressure and realize yield increase and stability. Due to the fact that injection allocation of a plurality of water injection wells cannot be completed under the pressure of a water injection system due to the reasons of underground stratum structure, change of oil layer physical properties and crude oil physical properties, oil layer pollution blockage caused in the production process and the like, conventional acidizing and fracturing are adopted for stratum blockage removal, the effective period is short, construction cost is high, pressurized water injection is an effective method for solving the problems, and the oil field is generally augmented injection in a mode of increasing the pressure of a main line or a single well.

At present, supercharging water injection equipment mainly comprises a high-pressure multistage centrifugal pump, a high-pressure three-plunger pump and high-efficiency hydraulic pressure injection equipment, and has a lot of problems in production and application, particularly as follows:

high-pressure multistage centrifugal pump: the high-pressure multistage centrifugal pump adopts a motor to drive an impeller shaft and a multistage impeller arranged on the impeller shaft to rotate at a high speed, and utilizes centrifugal force to pressurize and discharge water. The whole operating efficiency of multistage centrifugal pump is very low, and the efficiency of best operating mode point generally can not exceed 60%, and most efficiency is less than 40%, therefore power consumption is big, and the energy waste is very serious, simultaneously because structural constraint, a large amount of leakages easily appear in pump shaft mechanical seal department, causes environmental pollution, and multistage centrifugal pump only adapts to the clear water and increases annotates, increases annotates because of the easy emergence wearing and tearing and corrosion phenomenon of existence of granule nature sediment of oil field sewage, and the life-span shortens greatly, can not normal work even.

High-pressure triple plunger pump: the high-pressure three-plunger pump adopts a motor to drive a gear box or a large belt pulley to rotate at a high speed, and then the gear box or the large belt pulley drives a crankshaft to rotate to push a connecting rod and a plunger to reciprocate to suck and discharge liquid. The high-pressure three-plunger pump is influenced by the strength of a crankshaft, the diameter of a plunger is small, the diameter of the plunger is generally not larger than 70mm, in order to meet certain displacement, the stroke frequency of the plunger is very high and generally reaches 350-400 times/minute, a series of problems are brought to the plunger pump by the high stroke frequency, the vibration is large, the opening and closing collision of a pump valve is frequent, a bearing bush, the plunger and a filler are seriously abraded, the sealing water leakage is large, the faults are many, parts are frequently replaced in maintenance, the maintenance cost is very high, and particularly under the condition that the working pressure is larger than 25MPa, the vibration is severe and even the normal work cannot be realized due to the stress deformation of a machine body and the crankshaft.

The high-pressure multistage centrifugal pump and the high-pressure three-plunger pump have high working speed, high running noise and sharp and harsh sound, and the running noise generally exceeds 120 decibels, so that the health of daily managers is seriously influenced.

Most of the oilfield injected water is sewage, the high-pressure multistage centrifugal pump and the high-pressure triple-plunger pump are not provided with a matched water leakage discharge system, and the sewage leaked at the sealing part is generally discharged at a nearby well site, so that the environmental pollution is very serious.

The invention patent 201820284947.3 of the high-efficiency hydraulic augmented injection equipment and the invention patent of the high-efficiency hydraulic augmented injection equipment with the application number of 201810170041.3 in the actual examination stage adopt hydraulic drive with large plunger, long stroke, low stroke frequency, low operation speed and high transmission efficiency, but the drive mode is open hydraulic drive, so the reversing impact is large, although certain impact and noise can be relieved by adding a buffer mechanism, the impact cannot be completely eliminated.

The invention patent 201820284947.3 of the high-efficiency hydraulic augmented injection equipment and the invention patent of the high-efficiency hydraulic augmented injection equipment with the application number of 201810170041.3 at the actual examination stage are not provided with a water leakage discharge system, and sewage leaked at a sealing part can only be discharged at a nearby well site like a high-pressure multi-stage centrifugal pump and a high-pressure three-plunger pump, so that the environmental pollution is serious.

The invention patent 201820284947.3 of the high-efficiency hydraulic augmented injection equipment and the invention patent of the high-efficiency hydraulic augmented injection equipment with the application number of 201810170041.3 in the actual examination stage do not have an oil discharge system on a transmission cylinder communicating pipeline, the surface of a transmission plunger can carry an oil film to enter a transmission cylinder in the long-term operation process, and the transmission oil in the transmission cylinder can be continuously increased in the day and the month, so that the stroke is shortened, and the normal operation is influenced.

The invention patent 201820284947.3 of the high-efficiency hydraulic injection increasing equipment and the invention patent of the high-efficiency hydraulic injection increasing equipment with the application number of 201810170041.3 in the actual examination stage do not have a pressurizing plunger sealing body in a pressurizing cylinder barrel, oil field reinjection sewage is seriously corroded, once a sealing groove on the pressurizing cylinder barrel is corroded, the sealing groove cannot be effectively sealed, the sealing groove can only be integrally scrapped, and the maintenance amount of the equipment and the operation cost of the equipment are increased.

Disclosure of Invention

The invention aims to solve the technical problem of providing a closed hydraulic drive double-cylinder high-efficiency hydraulic pressurizing water injection device which has a large plunger, a long stroke, a low stroke frequency, low noise, high efficiency, a long service life and no pollution and adopts high-efficiency hydraulic drive.

In order to overcome the problems of the prior art, the technical scheme for solving the problems is as follows:

the closed hydraulic drive double-cylinder high-efficiency hydraulic pressurizing water injection equipment comprises a fan, a leather bag placing box, a liquid level adjusting leather bag, a rocker, a pressing plate, an oil tank, an air inlet check valve, an oil tank safety valve, a power motor, a closed loop variable hydraulic pump assembly, a working pipeline pressure gauge A, a working pipeline pressure gauge B, a flushing valve, a left pressure cylinder, a right pressure cylinder, an oil supplementing system, an oil discharging system, a lubricating system, an incoming water valve, an incoming water filter, an incoming water pressure gauge, an incoming water check valve, a drainage pressure gauge, a pressure stabilizing energy accumulator, a water leakage collecting box, a two-position two-way electromagnetic valve, a water leakage discharging system, a safety valve, an air cooling radiator, an independent heat dissipation oil pump motor set, a backflow prevention check valve, a return oil filter and a PLC control system. The closed loop variable hydraulic pump assembly comprises a closed loop variable hydraulic pump, a control valve, an oil supplementing pump, a filter, an oil supplementing overflow valve, an oil supplementing working pressure gauge, a pressure cut-off valve, an overpressure overflow valve and an oil supplementing check valve. The flushing valve comprises a hydraulic control valve and a pressure maintaining valve. One inlet and outlet of the closed loop variable hydraulic pump are connected with an oil inlet and outlet on the right pressurizing cylinder through an A working pipeline, and the other inlet and outlet of the closed loop variable hydraulic pump are connected with an oil inlet and outlet on the left pressurizing cylinder through a B working pipeline. The communicating interface on the left pressure cylinder is communicated with the communicating interface on the right pressure cylinder through a pipeline. The water inlet and outlet ports on the left pressure cylinder and the right pressure cylinder are provided with a water inlet one-way valve and a water discharge one-way valve, the inlet of the water inlet one-way valve is provided with a water inlet pressure gauge, a water inlet filter and a water inlet valve, the inlet of the water inlet valve is communicated with a water inlet pipeline, and the outlet of the water discharge one-way valve is provided with a water discharge pressure gauge and a pressure stabilizing energy accumulator and is communicated with a water injection well through a pipeline. And a two-position two-way electromagnetic valve, a safety valve, an air-cooled radiator, an anti-backflow one-way valve and an oil return filter are arranged on an outlet pipeline of the pressure stabilizing valve. An air-cooled radiator and a safety valve are arranged at an outlet of the independent heat dissipation oil pump motor set, an inlet of the air-cooled radiator is connected with an inlet of the safety valve through a pipeline, an outlet of the air-cooled radiator is communicated with an inlet of the oil return filter, and an outlet of the safety valve is communicated with an oil tank. The leather bag placing box is internally provided with a fan and a liquid level adjusting leather bag, the outlet of the fan is provided with a one-way valve, the outlet of the one-way valve is communicated with the liquid level adjusting leather bag, and the liquid level adjusting leather bag is communicated with an oil tank through a pipeline. The side surface and the inside of the leather bag placing box are respectively provided with a rocker and a pressing plate for adjusting the volume of the liquid level adjusting leather bag. A safety valve is arranged on the oil tank. A liquid level sensor is arranged on the water leakage collecting box.

The left pressure cylinder and the right pressure cylinder are identical in structure and size, and the connecting interfaces are arranged in a mirror symmetry mode. The upper end face of the transmission cylinder is provided with a displacement sensor and an air release port, the upper outer circular surface is provided with a communication interface, the lower outer circular surface is provided with an oil release port, the lower end is provided with a connecting flange and a centering boss, the outlets of the air release port and the oil release port are respectively provided with a stop valve, and the outlet of the stop valve is communicated with an oil tank. The displacement sensor is connected with an inner hole on the upper end face of the transmission cylinder barrel through threads, an upper connecting flange and a lower connecting flange are respectively arranged at the upper end and the lower end of the power cylinder barrel, an oil inlet and an oil outlet are arranged on the outer circular face of the upper connecting flange, a connecting flange is arranged at the upper end of the pressurizing cylinder barrel, a breathing hole, a lubricating oil inlet and an oil outlet and a water leakage outlet are arranged on the outer circular face of the connecting flange, a pressurizing plunger sealing body is arranged in the inner hole on the upper end of the pressurizing cylinder barrel, a lubricating oil collecting tank and a water leakage collecting tank are arranged in the inner hole of the pressurizing plunger sealing body, sealing grooves are arranged on two sides of the lubricating oil collecting tank and the water leakage collecting tank, the lubricating oil inlet and the oil outlet are communicated with the lubricating oil collecting tank, the water leakage outlet is communicated with the water leakage collecting tank, a communicating hole is arranged on the upper end face of the pressurizing plunger sealing body, a communicating hole is communicated with the breathing hole, a transmission plunger is arranged in the pressurizing cylinder barrel, a pressurizing plunger is arranged in the upper end of the transmission plunger barrel, a magnetic ring is arranged in the transmission plunger, a displacement sensor, a sunken tube is arranged in the transmission cylinder barrel, and the piston, and the displacement sensor are a water leakage plunger.

The oil supplementing system comprises a motor, an oil pump, an oil absorption filter, a pressure sensor, an overflow valve, a two-position two-way electromagnetic valve and a one-way valve. An outlet of the oil pump is connected with a pressure sensor, an overflow valve and an inlet and an outlet interface of the two-position two-way electromagnetic valve through pipelines, an inlet of the one-way valve is connected with an outlet of the two-position two-way electromagnetic valve, and an outlet of the one-way valve is communicated with a communication interface of the left pressure cylinder and a communication interface of the right pressure cylinder through pipelines.

The oil discharge system comprises a two-position three-way non-leakage electromagnetic valve, a hydraulic control one-way valve, an A port damper and an outlet damper. An opening A of the two-position three-way leakage-free electromagnetic valve is communicated with a piston control cavity of the hydraulic control one-way valve through an opening A damping, an opening P is communicated with an A working pipeline through a pipeline, an opening T is communicated with an oil tank, an oil inlet hole of the hydraulic control one-way valve is communicated with a communication interface of the left pressure cylinder and a communication interface of the right pressure cylinder through pipelines, and an oil outlet hole is communicated with the oil tank through an outlet damping. The hydraulic control one-way valve is assembled into an integrated block as a plug-in unit for use and comprises an upper valve body, a lower valve body, a control piston, a valve seat, a valve ball support and a return spring. The upper valve body excircle is big-end-down, be provided with the seal groove on the excircle of upper valve body upper portion, the lower part of upper portion excircle is provided with the breather hole, be provided with the oil outlet on the excircle that the lower part diameter is little, the oil outlet export is provided with the export damping, export damping export and oil tank intercommunication, go up big-end-up of valve body hole, be provided with control piston in last valve body hole, control piston upper portion diameter is big, the middle part diameter is little, upper portion excircle and middle part excircle and the big small hole sliding fit in the upper valve body, control piston upper portion and middle part excircle all are provided with the seal groove, be provided with the ejector pin at control piston's lower extreme, the ejector pin contacts with the valve ball, be provided with the disk seat in last valve body lower extreme hole, be provided with lower valve body under the disk seat, be provided with the inlet port lower part under the valve body, be provided with the seal groove on the excircle, lower valve body passes through threaded connection together with the upper valve body, be provided with the valve ball in the disk seat lower part, valve ball (125) lower part is provided with the valve ball support, valve ball support lower part is provided with reset spring.

The lubricating system comprises a motor, a lubricating oil pump, a liquid level sensor and a lubricating oil tank. The outlet of the lubricating oil pump is communicated with the lubricating oil inlet and outlet hole of the right pressure cylinder, the pipeline, the lubricating oil inlet and outlet hole of the left pressure cylinder and the lubricating oil tank sequentially through pipelines, and the outlet interface of the two-position two-way electromagnetic valve is communicated with the inlet interface on the lubricating oil tank in a butt joint mode.

The water leakage discharge system comprises an electromagnetic directional valve, a pressure cylinder assembly, a liquid inlet one-way valve and a liquid discharge one-way valve. The outlet of the liquid discharge check valve is communicated with a water inlet pipeline through a pipeline, the inlet of the liquid inlet check valve is communicated with a water leakage collecting box through a pipeline, the port P of the electromagnetic directional valve is communicated with the oil pump outlet port of the oil supplementing system through an inlet port, the port A is communicated with the oil inlet and outlet on the right flange of the left connecting cylinder barrel, the port B is communicated with the oil inlet and outlet on the left flange of the right connecting cylinder barrel, and the port T is communicated with an oil tank. A lubricating oil inlet and outlet hole in the pressure cylinder assembly is connected with an outlet interface of a lubricating oil pump through an oil inlet interface, the lubricating oil inlet and outlet hole is connected with a lubricating oil tank through a pipeline, the pressure cylinder assembly, the left pressure cylinder and the right pressure cylinder share one lubricating system, a water leakage discharge system and an oil supplement system share one set of hydraulic power system, and the hydraulic power system works in different time periods under the control of a PLC control system.

The pressure cylinder assembly comprises a displacement sensor, a left pressure cylinder barrel, a left pressure plunger sealing body, a left connecting cylinder barrel, a hydraulic cylinder barrel, a right connecting cylinder barrel, a right pressure plunger sealing body, a right pressure cylinder barrel, a piston connecting rod assembly, a left pressure plunger and a right pressure plunger. Be provided with displacement sensor at left side pressure cylinder left end face, displacement sensor passes through the terminal surface hole connection of screw thread and left pressure cylinder, is provided with the inlet outlet on the left end excircle, is provided with left pressure boost plunger seal in the right-hand member hole, be provided with the seal groove in left pressure boost plunger seal hole, right the groove, the water catch bowl and the lubricating oil sump pit leak, be provided with the hole and the lubricating oil business turn over oilhole of leaking on the flange of left pressure boost cylinder, the hole that leaks is linked together with the water catch bowl that leaks, lubricating oil business turn over oilhole is linked together with the lubricating oil sump pit. Be provided with the inlet outlet on right-hand member excircle of pressure cylinder, be provided with right pressure boost plunger seal in the left end hole, be provided with the seal groove in right pressure boost plunger seal hole, right the groove, water catch bowl and lubricating oil catch bowl leak, be provided with the hole that leaks and lubricating oil business turn over oilhole on the flange of right pressure boost cylinder, the hole that leaks is linked together with the water catch bowl that leaks, lubricating oil business turn over oilhole is linked together with the lubricating oil catch bowl, the hole that leaks communicates through pipeline and the collecting box that leaks. Be provided with the observation hole on the cylinder excircle is connected to the left side, and the lower part is provided with the leakage opening, is provided with the seal groove in the right-hand member hole and rights the groove, is provided with the observation hole on the cylinder excircle is connected to the right side, and the lower part is provided with the leakage opening, is provided with the seal groove in the left end hole and rights the groove. The piston is characterized in that a sealing groove and a righting groove are formed in the outer circle of the piston, a left piston rod is arranged at the left end, a right piston rod is arranged at the right end, and the piston, the left piston rod and the right piston rod form a whole. A left pressurizing plunger is arranged in an inner hole of the left pressurizing plunger sealing body, a right pressurizing plunger is arranged in an inner hole of the right pressurizing plunger sealing body, a left piston rod is in centering connection with the left pressurizing plunger through threads, and a right piston rod is in centering connection with the right pressurizing plunger through threads. The left end face inner hole of the left pressurizing plunger is provided with a magnetic ring, the center of the left pressurizing plunger is provided with a counter bore, the left pressurizing cylinder and the left connecting cylinder are connected together through flange centering, the left connecting cylinder and the hydraulic cylinder are connected together through flange centering, the hydraulic cylinder and the right connecting cylinder are connected together through flange centering, and the right connecting cylinder and the right pressurizing cylinder are connected together through flange centering. The piston is in sliding fit in an inner hole of the hydraulic cylinder barrel, the left piston rod is in sliding fit in an inner hole at the right end of the left connecting cylinder barrel, the right piston rod is in sliding fit in an inner hole at the left end of the right connecting cylinder barrel, the left pressurizing plunger is in sliding fit in an inner hole of the left pressurizing plunger sealing body, and the right pressurizing plunger is in sliding fit in an inner hole of the right pressurizing plunger sealing body.

The left pressure cylinder and the right pressure cylinder are driven by a closed loop variable hydraulic pump assembly, and a flushing valve is arranged between the working pipeline A and the working pipeline B.

Is provided with a water leakage collecting box and a water leakage discharge system.

The oil tank adopts a closed oil tank.

Compared with the prior art, the invention has the beneficial effects that: the closed loop variable hydraulic pump assembly is adopted for driving and fully utilizing the energy of incoming water to push the pistons in the left pressure cylinder and the right pressure cylinder to reciprocate up and down for pressurization, so that the transmission efficiency is greatly improved, the energy consumption is reduced, the movement speeds of the pistons in the left pressure cylinder and the right pressure cylinder are reduced through the large plunger long stroke and low stroke frequency under the condition of meeting a certain displacement, the service lives of the pressure plunger, the liquid inlet and discharge one-way valve and the sealing element are prolonged, the overhaul period of equipment is prolonged, the labor intensity of maintenance personnel is reduced, the continuous use working time of the equipment is prolonged, and the whole service life of the equipment is prolonged. Compared with a booster multistage centrifugal pump, the energy-saving pump can save energy by 30-40%, compared with a booster plunger pump, the energy-saving pump can save energy by 15-20%, compared with a booster multistage centrifugal pump, the maintenance period can be improved by 3-5 times, compared with a booster triple plunger pump, the maintenance period can be improved by 5-10 times, and compared with a booster plunger pump and a booster multistage centrifugal pump, the noise can be reduced by 1/3. The closed loop variable hydraulic pump assembly is adopted for driving, so that hydraulic impact in the reversing process is thoroughly eliminated, and vibration, impact and noise of the equipment in the running process are effectively reduced. The water leakage collecting box and the water leakage discharging system are arranged, so that leaked sewage can be pumped into a water inlet pipeline, and the pollution of the leaked water to the environment is thoroughly avoided. An oil discharge system is arranged, so that the influence of excessive transmission oil in the transmission cylinder barrel on the working stroke is avoided. The pressurizing plunger sealing body is arranged, so that the pressurizing plunger sealing body can be replaced only once the sealing groove is corroded and damaged, and the maintenance amount and the operation cost of equipment are effectively reduced.

Drawings

FIG. 1 is a schematic diagram of the present invention;

FIG. 2 is a block diagram of a left and right booster cylinder;

FIG. 3 is a block diagram of a pilot operated check valve;

fig. 4 is a schematic diagram of a water leakage discharge system and a structure diagram of a booster cylinder assembly.

In the figure, 1-a fan, 2-a leather bag placing box, 3-a liquid level adjusting leather bag, 4-a rocker, 5-a pressure plate, 6-an oil tank, 7-a one-way valve, 8-a pipeline, 9-a safety valve, 10-a power motor, 11-a closed loop variable hydraulic pump assembly, 12-a closed loop variable hydraulic pump, 13-a control valve, 14-an oil supplementing pump, 15-a filter, 16-an oil supplementing overflow valve, 17-an oil supplementing working pressure gauge, 18-a pressure cut-off valve, 19-an overpressure overflow valve, 20-an overpressure overflow valve, 21-an oil supplementing one-way valve, 22-an oil supplementing one-way valve, 23-A working pipeline pressure gauge, 24-a hydraulic control valve, 25-a pressure stabilizing valve, 26-a flushing valve and 27-B working pipeline pressure gauge, 28-PLC control system, 29-A working pipeline, 30-left pressure cylinder, 31-communication interface, 32-motor, 33-oil pump, 34-pressure sensor, 35-pipeline, 36-pipeline, 37-two-position three-way non-leakage electromagnetic valve, 38-hydraulic control one-way valve, 39-pipeline, 40-communication interface, 41-right pressure cylinder, 42-oil inlet and outlet, 43-lubricating oil inlet and outlet, 44-water leakage outlet, 45-pipeline, 46-water inlet and outlet, 47-water inlet pipeline, 48-water discharge one-way valve, 49-water inlet one-way valve, 50-water inlet valve, 51-pipeline, 52-water inlet filter, 53-water inlet pressure gauge, 54-water discharge one-way valve, 55-water inlet one-way valve, 56-water inlet and outlet, 57-pipeline, 58-liquid level sensor, 59-water leakage collecting box, 60-two-position two-way electromagnetic valve, 61-oil inlet interface, 62-B working pipeline, 63-inlet interface, 64-outlet pipeline, 65-water leakage discharging system, 66-safety valve, 67-air cooling radiator, 68-independent heat dissipation oil pump motor group, 69-anti-backflow one-way valve, 70-pipeline, 71-safety valve, 72-air cooling radiator, 73-oil return filter, 74-water leakage water outlet hole, 75-lubricating oil tank, 76-lubricating oil inlet and outlet hole, 77-outlet interface, 78-oil inlet and outlet, 79-inlet interface, 80-liquid level sensor, 81-lubricating system, 82-motor, 83-lubricating oil pump, 84-outlet interface, 85-water injection well, 86-water discharge pressure gauge, 87-pipeline, 88-pressure stabilizing accumulator, 89-oil supplementing system, 90-oil absorption filter, 91-pipeline, 92-overflow valve, 93-one-way valve, 94-two-position two-way electromagnetic valve, 95-outlet interface, 96-oil discharging system, 97-pressure cylinder, 98-pressure plunger sealing body, 99-breathing hole, 100-communication hole, 101-pressure plunger, 102-power cylinder, 103-piston, 104-upper connecting flange, 105-connecting flange, 106-displacement sensor probe rod sinking tube, 107-transmission plunger, 108-transmission cylinder, 109-magnetic ring, 110-displacement sensor, 111-air outlet, 112-stop valve, 113-stop valve, 114-oil outlet, 115-centering boss, 116-upper outer circular surface, 117-lower connecting flange, 118-connecting flange, 119-sealing groove, 120-lubricating oil sump, 121-water leakage sump, 122-oil inlet, 123-lower valve body, 124-reset spring, 125-valve ball, 126-valve seat, 127-ejector rod, 128-sealing groove, 129-control piston, 130-sealing groove, 131-upper valve body, 132-A damping port, 133-piston control cavity, 134-sealing groove, 135-upper diameter, 136-breathing hole, 137-outlet damping port, 138-oil outlet port, 139-valve ball support, 140-sealing groove, 141-displacement sensor, 142-water inlet and outlet, 143-magnetic ring, 144-left pressurizing plunger, 145-sealing groove, 146-flange, 147-lubricating oil inlet and outlet, 148-centering groove, 149-observation hole, 150-left piston rod, 151-centering groove, 152-sealing groove, 153-centering groove, 154-sealing groove, 155-centering groove, 156-piston rod assembly, 157-right piston rod, 158-sealing groove, 159-centering groove, 160-observation hole, 161-right pressurizing plunger, 162-centering groove, 163-lubricating oil inlet and outlet, 164-flange, 165-sealing groove, 166-water inlet and outlet, 167-pressurizing cylinder assembly, 168-right pressurizing cylinder barrel, 169-water leakage hole, 170-water leakage collecting groove, 171-lubricating oil collecting tank, 172-flange, 173-right pressurizing plunger sealing body, 174-right connecting cylinder barrel, 175-leakage port, 176-flange, 177-oil inlet and outlet, 178-flange, 179-hydraulic cylinder barrel, 180-piston, 181-flange, 182-oil inlet and outlet, 183-flange, 184-leakage port, 185-left connecting cylinder barrel, 186-left pressurizing plunger sealing body, 187-flange, 188-lubricating oil collecting tank, 189-water leakage collecting tank, 190-water leakage hole, 191-counter bore, 192-left pressurizing cylinder barrel, 193-electromagnetic reversing valve, 194-pipeline, 195-liquid drainage check valve, 196-liquid inlet check valve, 197-pipeline, 198-liquid drainage check valve, 199-liquid inlet check valve, 200-pipeline and 201-pipeline.

Detailed Description

The following detailed description of the preferred embodiments of the invention refers to the accompanying drawings.

As shown in fig. 1, the closed hydraulic drive double-cylinder efficient hydraulic pressurization water injection device comprises a fan (1), a leather bag placing box (2), a liquid level adjusting leather bag (3), a rocker (4), a pressing plate (5), an oil tank (6), an air inlet check valve (7), an oil tank safety valve (9), a power motor (10), a closed loop variable hydraulic pump assembly (11), an A working pipeline pressure gauge (23), a B working pipeline pressure gauge (27), a flushing valve (26), a left pressurizing cylinder (30), a right pressurizing cylinder (41), an oil supplementing system (89), an oil discharging system (96), a lubricating system (81), a water inlet valve (50), a water inlet filter (52), a water inlet pressure gauge (53), an water inlet check valve (55, 49), a water discharge check valve (54, 48), a water discharge pressure gauge (86), a pressure stabilizing energy accumulator (88), a water leakage collection box (59), a two-way electromagnetic valve (60), a water leakage discharge system (65), a safety valve (66, 71), an air-cooled radiator (67, 72), an independent oil heat dissipation pump motor set (68), an anti-return check valve (69), a return oil control system (73) and a PLC control system (28).

As shown in fig. 1, the closed-circuit variable displacement hydraulic pump assembly (11) includes a closed-circuit variable displacement hydraulic pump (12), a control valve (13), an oil supply pump (14), a filter (15), an oil supply overflow valve (16), an oil supply pressure gauge (17), a pressure cut-off valve (18), overpressure overflow valves (19, 20) and oil supply check valves (21, 22).

As shown in fig. 1, the flush valve (26) includes a pilot operated valve (24) and a pressure maintaining valve (25).

As shown in figure 1, one inlet and outlet of the closed loop variable hydraulic pump (12) is connected with an oil inlet and outlet (42) on the right pressure cylinder (41) through an A working pipeline (29), and the other inlet and outlet is connected with an oil inlet and outlet (78) on the left pressure cylinder (30) through a B working pipeline (62).

As shown in the figure 1, a communication interface (31) on the left pressure cylinder (30) is communicated with a communication interface (40) on the right pressure cylinder (41) through a pipeline (35).

As shown in fig. 1, water inlet check valves (55, 49) and water outlet check valves (54, 48) are arranged on the water inlet and outlet ports (56, 46) on the left pressurizing cylinder (30) and the right pressurizing cylinder (41), the inlets of the water inlet check valves (55, 49) are provided with a water inlet pressure gauge (53), a water inlet filter (52) and a water inlet valve (50), and the inlet of the water inlet valve (50) is communicated with a water inlet pipeline (47); the outlets of the drainage one-way valves (54, 48) are provided with a drainage pressure gauge (86) and a pressure-stabilizing accumulator (88) and are communicated with a water injection well (85) through a pipeline (51).

As shown in figure 1, a two-position two-way electromagnetic valve (60), a safety valve (66), an air-cooled radiator (67), a backflow-preventing one-way valve (69) and an oil return filter (73) are arranged on an outlet pipeline (64) of the pressure maintaining valve (25).

As shown in fig. 1, an air-cooled radiator (72) and a safety valve (71) are arranged at the outlet of the independent heat-radiating oil pump motor set (68). An inlet of the air-cooled radiator (72) is connected with an inlet of the safety valve (71) through a pipeline (70), an outlet of the air-cooled radiator (72) is communicated with an inlet of the oil return filter (73), and an outlet of the safety valve (71) is communicated with the oil tank (6).

As shown in figure 1, a fan (1) and a liquid level adjusting leather bag (3) are arranged in a leather bag placing box (2), a one-way valve (7) is arranged at the outlet of the fan (1), the outlet of the one-way valve (7) is communicated with the liquid level adjusting leather bag (3), and the liquid level adjusting leather bag (3) is communicated with an oil tank (6) through a pipeline (8).

As shown in figure 1, a rocker (4) and a pressing plate (5) are respectively arranged on the side surface and the inner part of the leather bag placing box (2) and are used for adjusting the volume of the liquid level adjusting leather bag (3).

As shown in fig. 1, a safety valve (9) is provided on the upper surface of the oil tank (6).

As shown in fig. 1, a liquid level sensor (58) is provided on the leaked water collection tank (59).

As shown in fig. 1, a specific embodiment of a hydraulic component arranged in the closed hydraulic drive double-cylinder high-efficiency hydraulic pressurizing water injection equipment is as follows: the leather bag placing box (2) adopts a box body with the length of 550mmX, the width of 1100mmX and the height of 1200 mm; the oil tank (6) adopts a tank body with the length of 1250mmX, the width of 1100mmX and the height of 1200 mm; the power motor (10) adopts an explosion-proof 6-pole motor with the power of 15kw and the rated rotating speed of 975 revolutions per minute; the closed loop variable hydraulic pump assembly (11) adopts a closed variable hydraulic pump with the specification model number of A4VG56EP 4D; the flushing valve (26) adopts a flushing valve with the specification model number of A2FM 56; the water inlet pressure gauge (53) and the water discharge pressure gauge (86) adopt digital display pressure transmitters with the specification model number of HSTL-800 and the measuring range of 0-40 MPa; the water inlet check valves (55, 49) and the water discharge check valves (54, 48) adopt sealing units with the valve ball diameter of 50mm and the valve seat outer diameter of 65mmX, inner diameter of 40mmX and height of 20 mm; the pressure-stabilizing energy accumulator (88) adopts a bag type energy accumulator with specification model number of NXQ-40/31.5-F and external diameter of D299; the two-position two-way electromagnetic valve (60) adopts a normally closed two-position two-way electromagnetic valve with the specification model of LSV2-08-2 NCS; the safety valves (66, 71) adopt a pipe type check valve with the specification model of S25A22B to set a certain back pressure to be used as the safety valves, and the air-cooled radiators (67, 72) adopt the specification model of DXT-5; the motor of the independent heat dissipation oil pump motor set (68) adopts an explosion-proof 6-pole motor with the power of 1.5kw and the rated rotating speed of 975 revolutions per minute, and the oil pump adopts a gear pump with the specification model of CBKEC-F44-AF phi R; the oil return filter (73) adopts a WY series magnetic oil return filter with the specification model number of WY-A500 multiplied by 10Q 2Y; the anti-backflow check valve (69) adopts a tubular check valve with the specification model number of S25A 22B; the fan (1) adopts a fan with the specification and model number of HG-250-B; the liquid level adjusting leather bag (3) adopts a leather bag with the specification model of 40L-740-299-NBR and the capacity of 40L; the liquid level sensor (58) adopts a liquid level sensor with specification model number of EA-M0300-NA-DW 02-A01.

As shown in the figure 1, the left pressure cylinder (30) and the right pressure cylinder (41) have the same structure and size, and the connecting interfaces are arranged in a mirror symmetry mode.

As shown in fig. 1 and 2, a displacement sensor (110) and an air release opening (111) are arranged on the upper end surface of the transmission cylinder (108), communication ports (31, 40) are arranged on the upper outer circular surface, an air release opening (114) is arranged on the lower outer circular surface, and a connecting flange (105) and a centering boss (115) are arranged on the lower end.

As shown in fig. 1 and 2, stop valves (112, 113) are respectively arranged at the outlet of the air outlet (111) and the outlet of the oil outlet (114), and the outlets of the stop valves (112, 113) are communicated with the oil tank (6).

As shown in fig. 2, the displacement sensor (110) is connected to the inner hole of the upper end surface of the transmission cylinder (108) by screw threads.

As shown in fig. 1 and 2, an upper connecting flange (104) and a lower connecting flange (117) are respectively arranged at the upper end and the lower end of the power cylinder (102), and oil inlet and outlet ports (42, 78) are arranged on the outer circular surface of the upper connecting flange (104).

As shown in fig. 1 and 2, a connecting flange (118) is arranged at the upper end of the pressurizing cylinder barrel (97), and a breathing hole (99), lubricating oil inlet and outlet holes (43, 76) and water leakage and water outlet holes (44, 74) are arranged on the outer circular surface of the connecting flange (118); a pressurizing plunger sealing body (98) is arranged in an inner hole at the upper end of the pressurizing cylinder barrel (97), a lubricating oil collecting tank (120) and a water leakage collecting tank (121) are arranged in the inner hole of the pressurizing plunger sealing body (98), and sealing grooves (119) are arranged on two sides of the lubricating oil collecting tank (120) and the water leakage collecting tank (121); the lubricating oil inlet and outlet holes (43 and 76) are communicated with a lubricating oil collecting tank (120), and the water leakage water outlet holes (44 and 74) are communicated with a water leakage collecting tank (121); a communicating hole (100) is arranged on the upper end surface of the pressurizing plunger sealing body (98), and the communicating hole (100) is communicated with the breathing hole (99); the upper outer circular surface (116) of the pressurization plunger sealing body (98) is matched with the inner hole of the power cylinder barrel (102) in a centering way.

As shown in figure 1, the water leakage outlet hole (74) of the left pressure cylinder (30) and the water leakage outlet hole (44) of the right pressure cylinder (41) are communicated with the water leakage collecting box (59) through a pipeline (57).

As shown in fig. 1 and 2, the lower end of the booster cylinder (97) is provided with water inlet and outlet ports (56, 46).

As shown in fig. 2, a piston (103) is arranged in a power cylinder (102), a transmission plunger (107) is arranged in a transmission cylinder (108), a booster plunger (101) is arranged in a booster cylinder (97), a magnetic ring (109) is arranged in an inner hole at the upper end of the transmission plunger (107), a displacement sensor probe rod immersed tube (106) is arranged in the transmission plunger (107), and the piston (103), the transmission plunger (107), the displacement sensor probe rod immersed tube (106) and the booster plunger (101) are integrated.

Referring to fig. 1 and 2, a specific embodiment of the left and right pressure cylinders (30, 41) is shown: the power cylinder barrel (102) adopts a hydraulic cylinder barrel with the inner diameter of 250mm, the outer diameter of 275mm and the length of 850 mm; the transmission cylinder barrel (108) adopts a cylinder barrel with the inner diameter of 215mm, the outer diameter of 240mm and the length of 800 mm; the inner diameter of the pressurizing cylinder barrel (97) is 215mm, the outer diameter is 240mm, and the length is 800 mm; the piston (103) adopts the dimensions of 250mm in outer diameter and 115mm in length, and the transmission plunger (107) and the pressurization plunger (101) adopt the dimensions of 210mm in outer diameter and 800mm in length.

As shown in fig. 1, the oil supplementing system (89) includes a motor (32), an oil pump (33), an oil absorption filter (90), a pressure sensor (34), an overflow valve (92), a two-position two-way solenoid valve (94) and a check valve (93).

As shown in figure 1, an outlet of an oil pump (33) is connected with a pressure sensor (34), an overflow valve (92) and an inlet and outlet interface (95) of a two-position two-way electromagnetic valve (94) through a pipeline (91), an inlet of a one-way valve (93) is connected with an outlet of the two-position two-way electromagnetic valve (94), and an outlet of the one-way valve (93) is communicated with a communication interface (31) of a left pressure cylinder (30) and a communication interface (40) of a right pressure cylinder (41) through a pipeline (35).

As shown in fig. 1, the oil supply system (89) functions as: transmission oil is replenished into the transmission cylinder (108) after equipment maintenance.

Referring to fig. 1, an embodiment of an oil replenishment system (89) is shown: the motor (32) adopts an explosion-proof 6-pole motor with the power of 1.5kw and the rated rotating speed of 975 revolutions per minute; the oil pump (33) adopts a Roots gear pump with the specification model number of 01ZAG16C 442D; the oil absorption filter (90) adopts an oil absorption filter with the specification model of WU-63 multiplied by 80-J; the pressure sensor (34) adopts a digital display pressure transmitter with the specification model of HSTL-800 and the measuring range of 0-40 MPa; the overflow valve (92) adopts a plug-in direct-acting overflow valve with the specification model of DBDS6K 10B/315; the two-position two-way electromagnetic valve (94) adopts a normally closed two-position two-way electromagnetic valve with the specification model of LSV2-08-2 NCS; the one-way valve (93) adopts a threaded cartridge type steel ball one-way valve with the specification and model number of LCV-06-B.

As shown in fig. 1 and 3, the oil drain system (96) includes a two-position three-way no-leakage solenoid valve (37), a pilot operated check valve (38), an a port damper (132), and an outlet damper (137).

As shown in the figures 1 and 3, an A port of a two-position three-way leakage-free electromagnetic valve (37) is communicated with a piston control cavity (133) of a hydraulic control one-way valve (38) through an A port damper (132), a P port is communicated with an A working pipeline (29) through a pipeline (36), a T port is communicated with an oil tank (6), an oil inlet hole (122) of the hydraulic control one-way valve (38) is communicated with a communication interface (31) of a left pressure cylinder (30) and a communication interface (40) of a right pressure cylinder (41) through pipelines (39 and 35), and an oil outlet hole (138) is communicated with the oil tank (6) through an outlet damper (137).

As shown in fig. 1 and 3, the pilot-operated check valve (38) is used as an insert assembled into a manifold block and comprises an upper valve body (131), a lower valve body (123), a control piston (129), a valve seat (126), a valve ball (125), a valve ball support (139) and a return spring (124).

As shown in fig. 1 and 3, the outer circle of the upper valve body (131) is large at the top and small at the bottom, a sealing groove (134) is arranged on the outer circle of the upper part of the upper valve body (131), a breathing hole (136) is arranged at the lower part of the outer circle of the upper part, an oil outlet (138) is arranged on the outer circle with the small diameter at the lower part, an outlet of the oil outlet (138) is provided with an outlet damper (137), an outlet of the outlet damper (137) is communicated with the oil tank (6), and an inner hole of the upper valve body (131) is large at the top and small at the bottom; a control piston (129) is arranged in an inner hole of an upper valve body (131), the diameter (135) of the upper portion of the control piston (129) is large, the diameter of the middle portion of the control piston (129) is small, the outer circle of the upper portion and the outer circle of the middle portion of the control piston (129) are in sliding fit with the large hole and the small hole in the upper valve body (131), sealing grooves (128 and 130) are formed in the upper portion and the outer circle of the middle portion of the control piston (129), an ejector rod (127) is arranged at the lowest end of the control piston (129), the ejector rod (127) is in contact with a valve ball (125), a valve seat (126) is arranged in the inner hole of the lower end of the upper valve body (131), a lower valve body (123) is arranged below the valve seat (126), an oil inlet hole (122) is formed in the lower portion of the lower valve body (123), a sealing groove (140) is formed in the outer circle, the lower valve body (123) is connected with the upper valve body (131) through threads, a valve ball (125) is arranged below the valve ball (125), a valve ball support (139) is arranged below the valve ball (125), and a return spring (124) is arranged below the valve ball support (139).

As shown in fig. 1 and 3, the oil drain system (96) functions and principles as follows: when the two-position three-way non-leakage electromagnetic valve (37) is switched to the port P to be communicated with the port A, high-pressure oil enters a piston control cavity (133) through a port A damper (132) to push a control piston (129) to move downwards, a mandril (127) pushes a valve ball (125) to leave a ball seat (126), an oil inlet hole (122) at the lower part of a lower valve body (123) is communicated with an oil outlet hole (138) arranged on the outer circle at the lower part of an upper valve body (131), a hydraulic control one-way valve (38) is opened to drain excessive oil in transmission cylinder barrels (108) of a left pressure cylinder (30) and a right pressure cylinder (41), and the piston (103) in the left pressure cylinder (30) and the right pressure cylinder (41) is ensured to run in a reasonable stroke interval; when the two-position three-way non-leakage electromagnetic valve (37) is switched to the port A to be communicated with the port T, the valve ball (125) moves upwards under the pushing of the reset spring (124), the valve ball (125) is seated on the valve seat (126), the oil inlet hole (122) at the lower part of the lower valve body (123) is disconnected and communicated with the oil outlet hole (138) formed in the outer circle at the lower part of the upper valve body (131), the hydraulic control one-way valve (38) is closed, and oil is closed to be discharged.

Referring to fig. 1 and 3, an embodiment of an oil drainage system (96) is shown: the two-position three-way leakage-free electromagnetic valve (37) adopts a threaded cartridge valve with the specification model of LSV-08-3-L; the hydraulic control one-way valve (38) adopts a size structure that the diameter of the upper part of a control piston (129) is 60mm, the diameter of the lower part of the control piston is 20mm, the diameter of a mandril (127) is 11mm, the size of a valve seat (126) is 20mmX of outer diameter and 11.5mmX of inner diameter and 12mm of height, the diameter of a valve ball (125) is 16mm, the diameter of an oil inlet hole (122) is 6mm, and the diameter of an oil outlet hole (138) is 5 mm.

As shown in fig. 1, the lubrication system (81) includes a motor (82), a lubrication oil pump (83), a liquid level sensor (80), and a lubrication oil tank (75).

As shown in fig. 1, an outlet of the lubricating oil pump (83) is communicated with a lubricating oil inlet and outlet hole (43) of the right pressure cylinder (41), a pipeline (87), a lubricating oil inlet and outlet hole (76) of the left pressure cylinder (30) and a lubricating oil tank (75) through a pipeline (45), and an outlet interface (77) of the two-position two-way electromagnetic valve (60) is in butt joint communication with an inlet interface (79) on the lubricating oil tank (75).

As shown in fig. 1, 2 and 4, the lubricating system (81) functions as: lubricating oil pumped by the lubricating oil pump (83) lubricates the surfaces of the left pressurizing plunger (101) in the left pressurizing cylinder (30) and the right pressurizing cylinder (41) and the surfaces of the left pressurizing plunger (144) and the right pressurizing plunger (161) in the pressurizing cylinder assembly (167), and the service life of the dynamic seal is prolonged.

As shown in fig. 1, when the lubricating oil in the lubricating oil tank (75) is insufficient, the two-position two-way electromagnetic valve (60) is controlled to be opened through the liquid level sensor (80) and the PLC control system (28), the lubricating oil is replenished from the oil tank (6), and when the lubricating oil is replenished to a set height, the two-position two-way electromagnetic valve (60) is closed, and the lubricating oil replenishment is stopped.

Fig. 1, a particular embodiment of a lubrication system (81): an oil pump motor set of the lubricating system (81) adopts a rotor oil pump motor set with the specification model number of ZCB-1.2 and the power of 120 w; the liquid level sensor (80) adopts a liquid level sensor with specification model number of EA-M0300-NA-DW 02-A01.

Referring to fig. 1 and 4, the leakage water discharge system (65) comprises a solenoid directional valve (193), a booster cylinder assembly (167), liquid inlet check valves (196, 199) and liquid discharge check valves (195, 198).

As shown in fig. 1 and 4, the outlet of the liquid discharge check valve (195, 198) is communicated with the water inlet pipeline (47) through a pipeline (201); the inlets of the liquid inlet one-way valves (196, 199) are communicated with the leaked water collecting box (59) through a pipeline (200).

As shown in the figures 1 and 4, a P port of an electromagnetic directional valve (193) is communicated with an outlet port (95) of an oil pump (33) of an oil supplementing system (89) through an inlet port (63), an A port is communicated with an oil inlet and outlet port (182) on a right flange (183) of a left connecting cylinder (185), a B port is communicated with an oil inlet and outlet port (177) on a left flange (176) of a right connecting cylinder (174), and a T port is communicated with an oil tank (6).

As shown in fig. 1 and 4, a lubricating oil inlet and outlet hole (163) in the pressure cylinder assembly (167) is connected to an outlet port (84) of a lubricating oil pump (83) through an oil inlet port (61), and a lubricating oil inlet and outlet hole (147) is connected to a lubricating oil tank (75) through a pipeline (197).

As shown in fig. 1 and 4, the pressure cylinder assembly (167), the left pressure cylinder (30), and the right pressure cylinder (41) share one lubrication system (81).

As shown in figure 1, the leakage water discharge system (65) and the oil supplement system (89) share a set of hydraulic power system, and work in different time periods under the control of the PLC control system (28).

As shown in fig. 4, the pressure cylinder assembly (167) includes a displacement sensor (141), a left pressure cylinder (192), a left pressure plunger sealing body (186), a left connecting cylinder (185), a hydraulic cylinder (179), a right connecting cylinder (174), a right pressure plunger sealing body (173), a right pressure cylinder (168), a piston rod assembly (156), a left pressure plunger (144), and a right pressure plunger (161).

As shown in fig. 4, a displacement sensor (141) is arranged on the left end face of the left pressurizing cylinder barrel (192), the displacement sensor (141) is connected with an inner hole of the end face of the left pressurizing cylinder barrel (192) through threads, a water inlet and outlet (142) is arranged on the outer circle of the left end, a left pressurizing plunger sealing body (186) is arranged in the inner hole of the right end, a sealing groove (145), a righting groove (148), a water leakage collecting groove (189) and a lubricating oil collecting groove (188) are arranged in the inner hole of the left pressurizing plunger sealing body (186), a water leakage hole (190) and a lubricating oil inlet and outlet hole (147) are arranged on a flange (146) of the left pressurizing cylinder barrel (192), the water leakage hole (190) is communicated with the water leakage collecting groove (189), and the lubricating oil inlet and outlet hole (147) is communicated with the lubricating oil collecting groove (188).

As shown in fig. 4, a water inlet and outlet (166) is arranged on the outer circle of the right end of the right pressurizing cylinder barrel (168), a right pressurizing plunger sealing body (173) is arranged in the inner hole of the left end, a sealing groove (165), a righting groove (162), a water leakage collecting groove (170) and a lubricating oil collecting groove (171) are arranged in the inner hole of the right pressurizing plunger sealing body (173), a water leakage hole (169) and a lubricating oil inlet and outlet hole (163) are arranged on a flange (164) of the right pressurizing cylinder barrel (168), the water leakage hole (169) is communicated with the water leakage collecting groove (170), and the lubricating oil inlet and outlet hole (163) is communicated with the lubricating oil collecting groove (171).

As shown in FIG. 4, the water leakage holes 169 and 190 are communicated with the water leakage collecting box 59 through a pipeline 194.

As shown in FIG. 4, an observation hole (149) is arranged on the excircle of the left connecting cylinder barrel (185), a leakage port (184) is arranged at the lower part, and a sealing groove (152) and a righting groove (151) are arranged in the inner hole at the right end.

As shown in FIG. 4, an observation hole (160) is arranged on the outer circle of the right connecting cylinder barrel (174), a leakage port (175) is arranged at the lower part, and a sealing groove (158) and a righting groove (159) are arranged in the inner hole at the left end.

As shown in fig. 4, a sealing groove (154) and a righting groove (153, 155) are arranged on the excircle of the piston (180), a left piston rod (150) is arranged at the left end, a right piston rod (157) is arranged at the right end, and the piston (180), the left piston rod (150) and the right piston rod (157) form a whole.

As shown in FIG. 4, a left pressurizing plunger (144) is arranged in an inner hole of a left pressurizing plunger sealing body (186), a right pressurizing plunger (161) is arranged in an inner hole of a right pressurizing plunger sealing body (173), a left piston rod (150) is in threaded centering connection with the left pressurizing plunger (144), and a right piston rod (157) is in threaded centering connection with the right pressurizing plunger (161).

As shown in fig. 4, a magnetic ring (143) is disposed in the inner hole of the left end face of the left pressurizing plunger (144), and a counterbore (191) is disposed in the center.

As shown in FIG. 4, the left pressurizing cylinder (192) and the left connecting cylinder (185) are connected together in a centering way through flanges (146, 187), the left connecting cylinder (185) and the hydraulic cylinder (179) are connected together in a centering way through flanges (183, 181), the hydraulic cylinder (179) and the right connecting cylinder (174) are connected together in a centering way through flanges (178, 176), and the right connecting cylinder (174) and the right pressurizing cylinder (168) are connected together in a centering way through flanges (172, 164).

As shown in fig. 4, the piston (180) is slidably fitted in the bore of the hydraulic cylinder (179), the left piston rod (150) is slidably fitted in the right end bore of the left connecting cylinder (185), the right piston rod (157) is slidably fitted in the left end bore of the right connecting cylinder (174), the left pressurizing plunger (144) is slidably fitted in the bore of the left pressurizing plunger seal body (186), and the right pressurizing plunger (161) is slidably fitted in the bore of the right pressurizing plunger seal body (173).

As shown in fig. 1 and 4, the operation principle of the leakage water discharge system (65) is as follows: when the water level of water leaking out of the water leaking holes (44, 74) of the left pressure cylinder (30) and the right pressure cylinder (41) and the water leaking out of the water leaking holes (169, 190) of the pressure cylinder assembly (167) collected by the water leaking collection box (59) reaches the position set by the liquid level sensor (58) arranged on the water leaking collection box (59), the PLC control system (28) controls the electromagnetic reversing valve (193) to reverse left and right, the piston connecting rod assembly (156) pushes the left pressure plunger (144) and the right pressure plunger (161) to move left and right to suck and discharge water, and the water leaking collected by the water leaking collection box (59) is pumped into the incoming water pipeline (47) through the pipeline (201). When the water level in the water leakage collecting box (59) is lower than the position set by the liquid level sensor (58), the PLC control system (28) controls the electromagnetic directional valve (193) to be powered off, and the pressure cylinder assembly (167) stops working.

Referring to fig. 1 and 4, a specific embodiment of the leakage water discharge system (65) is shown: the electromagnetic directional valve (193) adopts a two-position four-way one-way valve with a single electromagnet with the specification and model number of 4WE6D61B/CG24N9Z 5L; the diameters of valve balls of the liquid inlet check valves (196, 199) and the liquid discharge check valves (195, 198) adopt 16mm, and the size of a valve seat is a sealing unit with the outer diameter of 20mmX, the inner diameter of 11.5mmX and the height of 12 mm.

Referring to fig. 4, one embodiment of a pressure cylinder assembly (167): the left pressurizing cylinder barrel (192) and the right pressurizing cylinder barrel (168) are cylinder barrels with the inner diameter of 70mm, the outer diameter of 100mm, the length of 300mm and the outer diameter of a flange of 165 mm; the left connecting cylinder barrel (185) and the right connecting cylinder barrel (174) are cylinder barrels with the inner diameter of 83mm, the outer diameter of 105mm, the length of 205mm, the outer diameter of a flange at one end of 165mm and the outer diameter of a flange at the other end of 175 mm; the hydraulic cylinder barrel (179) adopts a cylinder barrel with the inner diameter of 100mm, the outer diameter of 120mm, the length of 300mm and the outer diameter of a flange of 175 mm; the piston connecting rod assembly (156) adopts the overall dimensions that the outer diameter of a piston is 100mm, the thickness is 65mm, the outer diameters of a left piston rod (150) and a right piston rod (157) are 60mm and 260mm, the outer diameters of a left pressurizing plunger (144) and a right pressurizing plunger (161) are 65mm and the length is 260 mm.

As shown in figure 1, a left pressure cylinder (30) and a right pressure cylinder (41) are driven by a closed loop variable hydraulic pump assembly (11), a flushing valve (26) is arranged between an A working pipeline (29) and a B working pipeline (62), hot oil in the A working pipeline (29) and the B working pipeline (62) is replaced by the flushing valve (26), and the replaced hot oil is cooled by an air-cooled radiator (67).

As shown in fig. 1, a leakage water collecting tank (59) and a leakage water discharging system (65) are provided.

As shown in figure 1, leakage water leaked from all the leakage holes is collected by the leakage water collecting box (59), the operation of the leakage water discharging system (65) is controlled under the control of the PLC control system (28), the leakage water collected by the leakage water collecting box (59) is driven into a water inlet pipeline (47), and the leakage water is prevented from being discharged into a nearby well site to pollute the environment.

A particular embodiment of a water leakage collection box (59): a box with the length of 750mmX, the width of 350mmX and the height of 500mm is adopted.

As shown in figure 1, the oil tank (6) adopts a closed oil tank, the height of the liquid level in the oil tank (6) is adjusted through the contraction and expansion of the volume of the liquid level adjusting leather bag (3), and the inflation volume of the liquid level adjusting leather bag (3) is set through a fan (1), a rocker (4) and a pressure plate (5).

As shown in figure 1, the closed oil tank can be used for avoiding the phenomenon of water drops caused by condensation between cold air and the hot oil tank, the pollution of condensed water accumulated by the water drops to hydraulic oil is thoroughly avoided, and meanwhile, the closed oil tank can be used for preventing dust and granular impurities in the external environment from entering the oil tank to pollute the hydraulic oil and influence the service life of hydraulic components.

Claims (10)

1. The closed type hydraulic drive double-cylinder high-efficiency hydraulic pressurization water injection equipment is characterized by comprising a fan (1), a leather bag placing box (2), a liquid level adjusting leather bag (3), a rocker (4), a pressing plate (5), an oil tank (6), an air inlet check valve (7), an oil tank safety valve (9), a power motor (10), a closed loop variable hydraulic pump assembly (11), an A working pipeline pressure gauge (23), a B working pipeline pressure gauge (27), a flushing valve (26), a left pressure cylinder (30), a right pressure cylinder (41), an oil supplementing system (89), an oil discharging system (96), a lubricating system (81), a water inlet valve (50), a water inlet filter (52), a water inlet pressure gauge (53), a water inlet check valve (55, 49), a water discharging check valve (54, 48), a water discharging pressure gauge (86), a pressure stabilizing energy accumulator (88), a collecting box (59), a two-way electromagnetic valve (60), a water leakage discharging system (65), a safety valve (66, 71), an air-cooled radiator (67, 72), an independent heat dissipating oil pump motor set (68), a one-way oil return valve (69), a PLC (28) and a water leakage control system (73); the closed loop variable hydraulic pump assembly (11) comprises a closed loop variable hydraulic pump (12), a control valve (13), an oil supplementing pump (14), a filter (15), an oil supplementing overflow valve (16), an oil supplementing working pressure gauge (17), a pressure cut-off valve (18), overpressure overflow valves (19, 20) and oil supplementing one-way valves (21, 22); the flushing valve (26) comprises a hydraulic control valve (24) and a pressure maintaining valve (25); one inlet and outlet of the closed loop variable hydraulic pump (12) is connected with an oil inlet and outlet (42) on the right pressure cylinder (41) through an A working pipeline (29), and the other inlet and outlet is connected with an oil inlet and outlet (78) on the left pressure cylinder (30) through a B working pipeline (62); the communication interface (31) on the left pressure cylinder (30) is communicated with the communication interface (40) on the right pressure cylinder (41) through a pipeline (35); water inlet and outlet ports (56, 46) on the left pressurizing cylinder (30) and the right pressurizing cylinder (41) are provided with water inlet one-way valves (55, 49) and water outlet one-way valves (54, 48), inlets of the water inlet one-way valves (55, 49) are provided with a water inlet pressure gauge (53), a water inlet filter (52) and a water inlet valve (50), and an inlet of the water inlet valve (50) is communicated with a water inlet pipeline (47); the outlets of the drainage one-way valves (54, 48) are provided with a drainage pressure gauge (86) and a pressure-stabilizing energy accumulator (88) and are communicated with a water injection well (85) through a pipeline (51); a two-position two-way electromagnetic valve (60), a safety valve (66), an air-cooled radiator (67), an anti-backflow one-way valve (69) and an oil return filter (73) are arranged on an outlet pipeline (64) of the pressure stabilizing valve (25); an air-cooled radiator (72) and a safety valve (71) are arranged at an outlet of an independent heat dissipation oil pump motor set (68), an inlet of the air-cooled radiator (72) is connected with an inlet of the safety valve (71) through a pipeline (70), an outlet of the air-cooled radiator (72) is communicated with an inlet of an oil return filter (73), and an outlet of the safety valve (71) is communicated with an oil tank (6); a fan (1) and a liquid level adjusting leather bag (3) are arranged in the leather bag placing box (2), a one-way valve (7) is arranged at the outlet of the fan (1), the outlet of the one-way valve (7) is communicated with the liquid level adjusting leather bag (3), and the liquid level adjusting leather bag (3) is communicated with an oil tank (6) through a pipeline (8); a rocker (4) and a pressing plate (5) are respectively arranged on the side surface and the inner part of the leather bag placing box (2) and are used for adjusting the volume of the liquid level adjusting leather bag (3); a safety valve (9) is arranged on the oil tank (6); a liquid level sensor (58) is arranged on the water leakage collecting box (59).

2. The closed hydraulic drive double-cylinder high-efficiency hydraulic pressurizing water injection device as claimed in claim 1, wherein the left pressurizing cylinder (30) and the right pressurizing cylinder (41) are identical in structure and size, and the connecting interfaces are arranged in a mirror symmetry manner; a displacement sensor (110) and an air release opening (111) are arranged on the upper end surface of the transmission cylinder (108), communication interfaces (31, 40) are arranged on the upper outer circular surface, an oil release opening (114) is arranged on the lower outer circular surface, and a connecting flange (105) and a centering boss (115) are arranged at the lower end; the outlets of the air outlet (111) and the oil outlet (114) are respectively provided with a stop valve (112, 113), and the outlets of the stop valves (112, 113) are communicated with the oil tank (6); the displacement sensor (110) is connected with an inner hole of the upper end surface of the transmission cylinder (108) through threads; an upper connecting flange (104) and a lower connecting flange (117) are respectively arranged at the upper end and the lower end of the power cylinder barrel (102), and oil inlet and outlet ports (42 and 78) are arranged on the outer circular surface of the upper connecting flange (104); a connecting flange (118) is arranged at the upper end of the pressurizing cylinder barrel (97), and a breathing hole (99), lubricating oil inlet and outlet holes (43, 76) and water leakage and outlet holes (44, 74) are arranged on the outer circular surface of the connecting flange (118); a pressurizing plunger sealing body (98) is arranged in an inner hole at the upper end of the pressurizing cylinder barrel (97), a lubricating oil collecting tank (120) and a water leakage collecting tank (121) are arranged in the inner hole of the pressurizing plunger sealing body (98), and sealing grooves (119) are arranged on two sides of the lubricating oil collecting tank (120) and the water leakage collecting tank (121); the lubricating oil inlet and outlet holes (43 and 76) are communicated with a lubricating oil collecting tank (120), and the water leakage water outlet holes (44 and 74) are communicated with a water leakage collecting tank (121); a communicating hole (100) is arranged on the upper end surface of the pressurizing plunger sealing body (98), and the communicating hole (100) is communicated with the breathing hole (99); the upper outer circular surface (116) of the pressurizing plunger sealing body (98) is matched with the inner hole of the power cylinder barrel (102) in a centering way; the water leakage outlet hole (74) of the left pressure cylinder (30) and the water leakage outlet hole (44) of the right pressure cylinder (41) are communicated with the water leakage collecting box (59) through a pipeline (57); the lower end of the pressurizing cylinder barrel (97) is provided with a water inlet and outlet (56, 46); a piston (103) is arranged in a power cylinder (102), a transmission plunger (107) is arranged in a transmission cylinder (108), a booster plunger (101) is arranged in a booster cylinder (97), a magnetic ring (109) is arranged in an inner hole at the upper end of the transmission plunger (107), a displacement sensor probe rod immersed tube (106) is arranged in the transmission plunger (107), and the piston (103), the transmission plunger (107), the displacement sensor probe rod immersed tube (106) and the booster plunger (101) are integrated.

3. The closed hydraulic drive double-cylinder high-efficiency hydraulic pressurization water injection device as claimed in claim 1, characterized in that the oil supplementing system (89) comprises a motor (32), an oil pump (33), an oil suction filter (90), a pressure sensor (34), an overflow valve (92), a two-position two-way solenoid valve (94) and a one-way valve (93); an outlet of the oil pump (33) is connected with inlets and outlet interfaces (95) of the pressure sensor (34), the overflow valve (92) and the two-position two-way electromagnetic valve (94) through a pipeline (91), an inlet of the one-way valve (93) is connected with an outlet of the two-position two-way electromagnetic valve (94), and an outlet of the one-way valve (93) is communicated with a communication interface (31) of the left pressure cylinder (30) and a communication interface (40) of the right pressure cylinder (41) through a pipeline (35).

4. The closed hydraulic drive double-cylinder high-efficiency hydraulic pressurization water injection device as claimed in claim 1, characterized in that the oil discharge system (96) comprises a two-position three-way non-leakage solenoid valve (37), a hydraulic control one-way valve (38), an A port damper (132) and an outlet damper (137); an A port of the two-position three-way leakage-free electromagnetic valve (37) is communicated with a piston control cavity (133) of a hydraulic control one-way valve (38) through an A port damper (132), a P port is communicated with an A working pipeline (29) through a pipeline (36), a T port is communicated with an oil tank (6), an oil inlet hole (122) of the hydraulic control one-way valve (38) is communicated with a communication interface (31) of a left pressure cylinder (30) and a communication interface (40) of a right pressure cylinder (41) through pipelines (39 and 35), and an oil outlet hole (138) is communicated with the oil tank (6) through an outlet damper (137); the hydraulic control one-way valve (38) is used as an insert and assembled into an integrated block, and comprises an upper valve body (131), a lower valve body (123), a control piston (129), a valve seat (126), a valve ball (125), a valve ball support (139) and a return spring (124); the outer circle of the upper valve body (131) is large in upper part and small in lower part, a sealing groove (134) is arranged on the outer circle of the upper part of the upper valve body (131), a breathing hole (136) is arranged on the lower part of the outer circle of the upper part, an oil outlet (138) is arranged on the outer circle with the small diameter of the lower part, an outlet damping (137) is arranged at the outlet of the oil outlet (138), the outlet of the outlet damping (137) is communicated with the oil tank (6), and the inner hole of the upper valve body (131) is large in upper part and small in lower part; a control piston (129) is arranged in an inner hole of an upper valve body (131), the diameter (135) of the upper portion of the control piston (129) is large, the diameter of the middle portion of the control piston (129) is small, the outer circle of the upper portion and the outer circle of the middle portion of the control piston (129) are in sliding fit with the large hole and the small hole in the upper valve body (131), sealing grooves (128 and 130) are formed in the upper portion and the outer circle of the middle portion of the control piston (129), an ejector rod (127) is arranged at the lowest end of the control piston (129), the ejector rod (127) is in contact with a valve ball (125), a valve seat (126) is arranged in the inner hole of the lower end of the upper valve body (131), a lower valve body (123) is arranged below the valve seat (126), an oil inlet hole (122) is formed in the lower portion of the lower valve body (123), a sealing groove (140) is formed in the outer circle, the lower valve body (123) is connected with the upper valve body (131) through threads, a valve ball (125) is arranged below the valve ball (125), a valve ball support (139) is arranged below the valve ball (125), and a return spring (124) is arranged below the valve ball support (139).

5. The closed hydraulic drive double-cylinder high-efficiency hydraulic pressurizing water injection device as claimed in claim 1, characterized in that the lubricating system (81) comprises a motor (82), a lubricating oil pump (83), a liquid level sensor (80) and a lubricating oil tank (75); an outlet of the lubricating oil pump (83) is communicated with a lubricating oil inlet and outlet hole (43) of the right pressure cylinder (41), a pipeline (87), a lubricating oil inlet and outlet hole (76) of the left pressure cylinder (30) and a lubricating oil tank (75) sequentially through a pipeline (45), and an outlet interface (77) of the two-position two-way electromagnetic valve (60) is communicated with an inlet interface (79) on the lubricating oil tank (75) in a butt joint mode.

6. The closed hydraulic drive double-cylinder high-efficiency hydraulic pressurization water injection device as claimed in claim 1, characterized in that the leakage water discharge system (65) comprises a solenoid directional valve (193), a pressurization cylinder assembly (167), liquid inlet one-way valves (196, 199) and liquid discharge one-way valves (195, 198); the outlets of the liquid drainage check valves (195 and 198) are communicated with a water inlet pipeline (47) through a pipeline (201); inlets of the liquid inlet check valves (196, 199) are communicated with the water leakage collecting box (59) through a pipeline (200); a P port of the electromagnetic directional valve (193) is communicated with an outlet port (95) of an oil pump (33) of an oil supplementing system (89) through an inlet port (63), an A port is communicated with an oil inlet and outlet port (182) on a right flange (183) of a left connecting cylinder barrel (185), a B port is communicated with an oil inlet and outlet port (177) on a left flange (176) of a right connecting cylinder barrel (174), and a T port is communicated with an oil tank (6); a lubricating oil inlet and outlet hole (163) in the pressure cylinder assembly (167) is connected with an outlet interface (84) of a lubricating oil pump (83) through an oil inlet interface (61), and a lubricating oil inlet and outlet hole (147) is connected with a lubricating oil tank (75) through a pipeline (197); the pressure cylinder assembly (167), the left pressure cylinder (30) and the right pressure cylinder (41) share one lubricating system (81); the water leakage discharge system (65) and the oil supplement system (89) share a set of hydraulic power system, and work in different time periods under the control of the PLC control system (28).

7. The closed type hydraulic drive double-cylinder high-efficiency hydraulic pressurizing water injection device as claimed in claim 6, wherein the pressurizing cylinder assembly (167) comprises a displacement sensor (141), a left pressurizing cylinder (192), a left pressurizing plunger sealing body (186), a left connecting cylinder (185), a hydraulic cylinder (179), a right connecting cylinder (174), a right pressurizing plunger sealing body (173), a right pressurizing cylinder (168), a piston rod assembly (156), a left pressurizing plunger (144) and a right pressurizing plunger (161); a displacement sensor (141) is arranged on the left end face of the left pressurizing cylinder barrel (192), the displacement sensor (141) is connected with an inner hole of the end face of the left pressurizing cylinder barrel (192) through threads, a water inlet and outlet (142) is arranged on the excircle of the left end, a left pressurizing plunger sealing body (186) is arranged in the inner hole of the right end, a sealing groove (145), a righting groove (148), a water leakage collecting groove (189) and a lubricating oil collecting groove (188) are arranged in the inner hole of the left pressurizing plunger sealing body (186), a water leakage hole (190) and a lubricating oil inlet and outlet hole (147) are arranged on a flange (146) of the left pressurizing cylinder barrel (192), the water leakage hole (190) is communicated with the water leakage collecting groove (189), and the lubricating oil inlet and outlet hole (147) is communicated with the lubricating oil collecting groove (188); a water inlet and outlet (166) is arranged on the outer circle of the right end of the right pressurizing cylinder barrel (168), a right pressurizing plunger sealing body (173) is arranged in the inner hole of the left end, a sealing groove (165), a righting groove (162), a water leakage collecting tank (170) and a lubricating oil collecting tank (171) are arranged in the inner hole of the right pressurizing plunger sealing body (173), a water leakage hole (169) and a lubricating oil inlet and outlet hole (163) are arranged on a flange (164) of the right pressurizing cylinder barrel (168), the water leakage hole (169) is communicated with the water leakage collecting tank (170), and the lubricating oil inlet and outlet hole (163) is communicated with the lubricating oil collecting tank (171); the water leakage holes (169 and 190) are communicated with the water leakage collecting box (59) through a pipeline (194); an observation hole (149) is formed in the outer circle of the left connecting cylinder barrel (185), a leakage port (184) is formed in the lower portion of the left connecting cylinder barrel, and a sealing groove (152) and a righting groove (151) are formed in an inner hole in the right end of the left connecting cylinder barrel; an observation hole (160) is arranged on the excircle of the right connecting cylinder barrel (174), a leakage port (175) is arranged at the lower part of the right connecting cylinder barrel, and a sealing groove (158) and a righting groove (159) are arranged in an inner hole at the left end of the right connecting cylinder barrel; a sealing groove (154) and righting grooves (153, 155) are arranged on the excircle of the piston (180), a left piston rod (150) is arranged at the left end, a right piston rod (157) is arranged at the right end, and the piston (180), the left piston rod (150) and the right piston rod (157) form a whole; a left pressurizing plunger (144) is arranged in an inner hole of the left pressurizing plunger sealing body (186), a right pressurizing plunger (161) is arranged in an inner hole of the right pressurizing plunger sealing body (173), a left piston rod (150) is in threaded centering connection with the left pressurizing plunger (144), and a right piston rod (157) is in threaded centering connection with the right pressurizing plunger (161); a magnetic ring (143) is arranged in an inner hole of the left end face of the left pressurizing plunger (144), a counter bore (191) is arranged in the center, and the left pressurizing cylinder barrel (192) and the left connecting cylinder barrel (185) are connected together in a centering way through flanges (146, 187); the left connecting cylinder barrel (185) and the hydraulic cylinder barrel (179) are connected together in a centering way through flanges (183, 181); the hydraulic cylinder barrel (179) and the right connecting cylinder barrel (174) are connected together in a centering way through flanges (178, 176); the right connecting cylinder barrel (174) and the right pressurizing cylinder barrel (168) are connected together in a centering way through flanges (172, 164); the piston (180) is in sliding fit in an inner hole of the hydraulic cylinder barrel (179), the left piston rod (150) is in sliding fit in an inner hole at the right end of the left connecting cylinder barrel (185), and the right piston rod (157) is in sliding fit in an inner hole at the left end of the right connecting cylinder barrel (174); the left boost plunger (144) is a sliding fit in the bore of the left boost plunger seal (186) and the right boost plunger (161) is a sliding fit in the bore of the right boost plunger seal (173).

8. The closed hydraulic drive double-cylinder high-efficiency hydraulic pressure boosting water injection device as claimed in claim 1, characterized in that the left pressure boosting cylinder (30) and the right pressure boosting cylinder (41) are driven by a closed loop variable hydraulic pump assembly (11), and a flushing valve (26) is arranged between the A working pipeline (29) and the B working pipeline (62).

9. The closed hydraulic drive double-cylinder high-efficiency hydraulic pressurizing water injection device as claimed in claim 1, characterized in that a water leakage collecting box (59) and a water leakage discharging system (65) are provided.

10. The closed hydraulic drive double-cylinder high-efficiency hydraulic pressurizing water injection device as claimed in claim 1, characterized in that the oil tank (6) is a closed oil tank, the height of the liquid level in the oil tank (6) is adjusted by the contraction and expansion of the volume of the liquid level adjusting leather bag (3), and the inflation volume of the liquid level adjusting leather bag (3) is set by the fan (1), the rocker (4) and the pressure plate (5).

Images