CN110285109B - Pneumatic control valve and gas-liquid pressure conversion control device - Google Patents
Pneumatic control valve and gas-liquid pressure conversion control device Download PDFInfo
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- CN110285109B CN110285109B CN201910443607.XA CN201910443607A CN110285109B CN 110285109 B CN110285109 B CN 110285109B CN 201910443607 A CN201910443607 A CN 201910443607A CN 110285109 B CN110285109 B CN 110285109B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/021—Installations or systems with accumulators used for damping
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/202—Externally-operated valves mounted in or on the actuator
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a pneumatic control valve and a gas-liquid pressure conversion control device. The invention controls the movement of pushing the piston rod after air inlet through the pneumatic control valve, controls the staggered oil outlet of the oil cylinder to provide pressure, controls the oil outlet pressure of a hydraulic system formed by the oil cylinder through regulating the air inlet pressure through the pneumatic pressure valve, buffers the pressure pulsation caused by interrupted oil supply generated by the gas-liquid pressurization control device at the cylinder reversing moment, adopts aluminum alloy materials for moving parts such as the piston and the like of the device, ensures the strength, lightens the weight of a reciprocating moving part as much as possible, improves the reversing sensitivity, reduces the reversing energy consumption and also reduces the pressure pulsation.
Description
Technical Field
The invention belongs to gas-liquid conversion equipment, and particularly relates to a pneumatic control valve and a gas-liquid pressure conversion control device.
Background
The hydraulic system of the present numerically controlled machine tool basically adopts an electric motor to drive a hydraulic pump to provide a chuck, a tailstock and a tool rest which are driven to run by high-pressure oil required by the running of the high-pressure oil. The oil supply mode has the advantages of smooth oil supply pressure, small oil supply pulsation and low noise, but the oil supply mode has obvious defects and mainly comprises the following aspects: firstly, the oil pump motor set occupies a larger space of an upper cover plate of the oil tank; secondly, the weight of the oil pump motor set is large; thirdly, the energy consumption of the motor group of the oil pump is large, especially when the hydraulic system needs to maintain pressure, the oil pump needs to continuously provide high-pressure oil for the chuck to maintain the clamping of the chuck, the motor needs to be operated at full speed all the time, and the part of energy is wasted, although most of hydraulic stations at present.
The energy consumption of the system is reduced to a certain extent by selecting the automatic variable pump, but the hydraulic system always runs in a high-pressure state and needs to consume larger power, and the running efficiency of the motor is low under light load. The oil temperature of the hydraulic system is easy to rise due to large energy consumption, the hydraulic system has to adopt the increased oil tank volume, and auxiliary measures of an air cooler or a water cooler are added to help the hydraulic system to dissipate heat, so that the size of the hydraulic system is increased, the space occupied by an inner plate of the machine tool is large, in addition, the heat dissipation design of the hydraulic system is also required to be considered for the machine tool, and the design workload of the machine tool is increased. The existing gas-liquid supercharging device can solve the energy consumption problem of a hydraulic system, the gas-liquid supercharging device is driven by the reciprocating action of a cylinder to provide high-pressure oil required by the operation of a machine tool, only compressed air is required to be blown into the cylinder to maintain certain pressure when the hydraulic system of the machine tool maintains pressure, the cylinder does not act, the energy consumption of the hydraulic system is extremely low at the moment, the system does not generate heat, and a heat dissipation device is not required to be arranged, so that the size of the hydraulic system can be greatly reduced, but the existing gas-liquid supercharging device has the defects of unstable oil supply pressure and large oil supply pulsation due to the fact that the cylinder reciprocates to absorb and discharge oil.
Disclosure of Invention
The purpose of the invention is as follows: in view of the above-mentioned deficiencies of the prior art, a first object of the present invention is to provide a pneumatic control valve, and a second object of the present invention is to provide a pneumatic-hydraulic pressure conversion control device based on the pneumatic control valve, to improve the stability of the pressure output of the machine tool and the hydraulic equipment and to realize efficient control.
A pneumatic control valve comprises a pneumatic valve front side cover, a pneumatic valve shell, a pneumatic valve cylinder sleeve, a pneumatic valve core, a pneumatic valve rear side cover, a cylinder rear cavity, a cylinder exhaust port, a cylinder front cavity, a pneumatic valve and a pneumatic valve rear cavity, wherein when high-pressure gas enters the air inlet of the pneumatic control valve, the pneumatic valve core is pushed to retreat to a rear limit position, the air inlet is communicated with the cylinder rear cavity, the cylinder front cavity is communicated with the cylinder exhaust port, the high-pressure gas enters the cylinder rear cavity and then pushes a cylinder piston rod to advance, and the cylinder piston rod is driven; the hydraulic cylinder piston is pushed forwards, the hydraulic cylinder pushes the hydraulic oil inside out of the hydraulic cylinder and enters a hydraulic valve group of a machine tool to drive the machine tool cylinder to operate, the pneumatic control valve further comprises a front thimble arranged at the front limit position of the cylinder, when the piston of the cylinder contacts with the firing pin, high-pressure air control airflow communicated with the air inlet is communicated with the rear cavity of the air valve, the high-pressure air enters the rear cavity of the air valve to push the air valve core to move forward to the front limit position, the high-pressure air is communicated with the front cavity of the cylinder, the rear cavity of the cylinder is communicated with the air outlet of the cylinder, the high-pressure air enters the front cavity of the cylinder to push the piston of the cylinder to move backward, the piston of the cylinder returns to the rear limit position of the cylinder under the pushing of the high-pressure, when the cylinder piston retreats to the rear limit position, the piston impacts the rear thimble, high-pressure gas in the rear cavity of the gas valve is exhausted, the gas valve core retreats, and the cylinder piston repeatedly advances, so that the repeated action is formed.
Furthermore, the pneumatic control valve comprises a connecting channel which is provided with an air valve cylinder sleeve and an air cylinder at the air cylinder connecting part at two sides of the air cylinder piston rod, and the connecting channel is positioned at two sides of the air valve core and between the upper part and the lower part of the air cylinder piston rod and the contact wall of the cylinder body.
Furthermore, the connecting channel of the cylinder is connected with the front cavity of the cylinder and the exhaust port of the cylinder when the air valve core is positioned at the rear limit position, and is connected with the rear cavity of the cylinder and the exhaust port of the cylinder when the air valve core is positioned at the front limit position.
A gas-liquid pressure conversion control device is formed by combining an oil cylinder and an air cylinder, wherein the oil cylinder is formed by the oil cylinder and the air cylinder and comprises an oil cylinder rear cover, a front cylinder barrel, a front piston, an oil cylinder sealing ring, an oil cylinder middle body, an oil cylinder sealing ring, a rear cylinder barrel, a piston rod and an oil cylinder front cover; the cylinder comprises a pneumatic reversing valve, a cylinder front cover, a cylinder barrel, a cylinder piston, a firing pin and a cylinder rear cover, the piston in the cylinder barrel is connected with the cylinder piston in the cylinder through a piston rod, the push-pull reciprocating motion of the cylinder piston drives the front piston of the cylinder to reciprocate, the oil absorption and oil outlet actions of the device are completed, the cylinder piston moves from the cylinder front limit to the cylinder rear limit, and cylinder channels and cylinder rear cavity channels arranged on two sides of the piston rod and the cylinder piston correspond to a cylinder rear cavity, a cylinder exhaust port and a cylinder front cavity arranged on the upper side and the lower side of the pneumatic control valve and comprise the opening and closing states of the control air valve.
Furthermore, an oil cylinder middle body is arranged at the joint of the front cylinder barrel and the rear cylinder barrel of the oil cylinder part, two adjacent cylinder barrels and oil passages are tightly connected through an oil cylinder sealing ring, and the oil cylinder middle body is also provided with an oil suction one-way valve and an oil outlet one-way valve which are correspondingly connected with an oil outlet and an oil suction port;
the oil cylinder front cover and the oil cylinder rear cover are provided with vent holes communicated with the atmosphere, and the pistons and the front and rear covers of the air cylinder and the oil cylinder are respectively provided with a sealing ring and a guide belt to separate the containing cavities.
The cylinder and the oil cylinder are sealed and fixed by welding or bolts, and a sealing ring is arranged at the joint of the cylinder and the oil cylinder; the device is also provided with a gas-liquid supercharging device, and the gas-liquid supercharging device comprises a pneumatic pressure regulating valve and a hydraulic accumulator; the pneumatic pressure regulating valve is positioned at an air inlet of the gas-liquid supercharging device and connected with an air inlet of the air cylinder to regulate the air inlet pressure of the air cylinder, the hydraulic energy accumulator is positioned at an oil outlet of the device, and the buffer device is used for intermittently supplying oil to the air cylinder at the moment of reversing.
Has the advantages that: compared with the prior art, the pneumatic control valve provided by the invention can effectively control the stability of pressure output, has a simple structure, and is suitable for gas-liquid control conversion on various different devices; in addition, the device provided by the invention greatly reduces the energy consumption, simplifies a hydraulic system, reduces the energy consumption and the heat productivity of the hydraulic system, can omit a heat dissipation device, can greatly reduce the volume of an oil tank, and only needs the oil consumption capable of supplying the oil cylinder to move back and forth; secondly, the front cavity and the rear cavity of the air cylinder are fully utilized, the working efficiency is improved by one time, the front oil cylinder and the rear oil cylinder can absorb and discharge oil in a staggered manner, a series of problems caused by oil supply interruption can be avoided, and the pressure pulsation of the gas-liquid pressurization control device is close to the oil discharge pressure pulsation of the oil pump motor set due to the buffering effect of the energy accumulator; thirdly, the invention does not need to provide a three-phase power supply for the hydraulic system, simplifies the application circuit of the machine tool and improves the safety of the hydraulic system of the machine tool.
Drawings
FIG. 1 is a schematic structural diagram of a gas-liquid pressure conversion control device according to the present invention;
FIG. 2 is a schematic diagram of the pneumatic control valve of the present invention in a forward limit configuration;
FIG. 3 is a schematic diagram of the pneumatic control valve of the present invention in a rear limit configuration;
Detailed Description
In order to explain the technical solutions disclosed in the present invention in detail, the following embodiments are further described with reference to the accompanying drawings.
Aiming at the defects of the traditional gas-liquid control device or gas-liquid supercharging device, the gas-liquid pressure conversion control device provided by the invention adopts the combination of a large-diameter cylinder and a small-diameter hydraulic cylinder, and the push-pull reciprocating motion of the cylinder is utilized to drive the piston of the hydraulic cylinder to reciprocate so as to complete the oil absorption and oil discharge functions of the gas-liquid supercharging device. The gas-liquid conversion control device adopts a double-acting cylinder to drive two hydraulic cylinders which are connected in series through a piston rod, the pistons of the cylinder and the hydraulic cylinders are rigidly connected, and the oil absorption and the oil discharge of the two hydraulic cylinders are staggered, so that the cylinder can complete the two actions of oil absorption and oil discharge simultaneously no matter the cylinder moves forwards or backwards, and the working efficiency of a hydraulic system is doubled.
Specifically, as shown in fig. 1, the gas-liquid conversion control device is composed of an oil cylinder and an air cylinder, wherein the oil cylinder comprises an oil cylinder rear cover 1, a front cylinder barrel 2, a front piston 3, an oil cylinder sealing ring 4, an oil cylinder middle body 5, an oil cylinder sealing ring 6, a rear cylinder barrel 7, a piston rod 8 and an oil cylinder front cover 9; the cylinder comprises a clothespin and more than one combination thereof, the cylinder comprises a pneumatic reversing valve 10, a cylinder front cover 11, a cylinder barrel 12, a cylinder piston 13, a firing pin 14 and a cylinder rear cover 15, a piston in the cylinder barrel in the device is connected with the cylinder piston 13 in the cylinder through a piston rod 8, and the push-pull reciprocating motion of the cylinder piston 13 drives a front piston 3 of the cylinder to reciprocate so as to finish the oil sucking and discharging actions of the device.
The pneumatic control valve 10 includes a valve front side cover 16, a valve housing 17, a valve cylinder sleeve 18, a valve core 19, and a valve rear side cover 20, and referring to fig. 2 and 3, fig. 2 shows the valve core 19 in the pneumatic control valve at a front limit, and fig. 3 shows the valve core 19 in the pneumatic control valve at a rear limit.
For the pneumatic control valve, when high-pressure air enters an air valve inlet, the air valve core 19 is pushed to retreat to a rear limit, the air inlet is communicated with an air cylinder rear cavity 21, an air cylinder front cavity 23 is communicated with an air cylinder exhaust port 22, the high-pressure air enters the air cylinder rear cavity 21, a piston rod of the air cylinder is pushed to advance, the piston rod of the air cylinder drives a front hydraulic cylinder and a rear hydraulic cylinder to advance forwards, the hydraulic cylinder at the rear pushes the hydraulic oil in the interior out of the oil cylinder at a certain pressure and enters a hydraulic valve group of a machine tool to drive the oil cylinder of the machine tool to operate, the front hydraulic cylinder sucks the hydraulic oil at the same time, when the piston of the air cylinder advances to the air cylinder front limit, the piston impacts a front thimble, at the moment, high-pressure air control air flow communicated with the air inlet is communicated with the air valve rear cavity 25, the, high-pressure air enters the front cavity 23 of the air cylinder to push the air cylinder piston to retreat, the air cylinder piston returns to the rear limit position of the air cylinder under the pushing of the high-pressure air, at the moment, the piston rod of the air cylinder drives two oil cylinder pistons to pull backwards, the front hydraulic cylinder pushes the internal hydraulic oil out of the oil cylinder with certain pressure to enter a hydraulic valve group of a machine tool to drive the oil cylinder of the machine tool to operate, the rear hydraulic cylinder sucks in the hydraulic oil at the same time, when the air cylinder piston retreats to the rear limit position of the air cylinder, the piston impacts a rear thimble, the high-pressure air in the rear cavity of the air valve is exhausted, the valve core retreats, the air cylinder piston repeatedly advances, the reciprocating action is formed. The cylinder continuously and repeatedly moves forwards and backwards to push the oil cylinder piston to continuously output pressure oil. According to the device, the two oil cylinders are driven by one air cylinder to perform staggered action, oil absorption and oil discharge are performed simultaneously, and the defect of oil supply interruption of the traditional supercharging device is overcome while the efficiency is improved.
Based on the pneumatic control valve, the gas-liquid conversion control device provided by the invention is composed of an oil cylinder and air cylinders, the number of the oil cylinder and the air cylinders can be adjusted according to actual needs, and in the process that the air cylinder piston 13 moves from the front limit of the air cylinder to the rear limit of the air cylinder, the air cylinder channels and the air cylinder rear cavity channels which are arranged on the two sides of the piston rod 8 and the air cylinder piston 13 correspond to the air cylinder rear cavity 17, the air cylinder exhaust port 22 and the air cylinder front cavity 23 which are arranged on the upper side and the lower side of the pneumatic control valve 10, and the opening and.
An oil cylinder middle body 5 is arranged at the joint of the front cylinder barrel 2 and the rear cylinder barrel 7 of the oil cylinder part, two adjacent cylinder barrels and oil passages are tightly connected through an oil cylinder sealing ring 6, and the oil cylinder middle body 5 is also provided with an oil suction one-way valve and an oil outlet one-way valve which are correspondingly connected with an oil outlet and an oil suction port. The front cover 1 and the rear cover 9 of the oil cylinder are provided with vent holes communicated with the atmosphere, and the pistons and the front and rear covers of the air cylinder and the oil cylinder are respectively provided with a sealing ring and a guide belt to separate the containing cavities.
The energy-saving gas-liquid conversion control device adopts a large-diameter cylinder to be combined with a front and a rear two-stage small-diameter hydraulic cylinders together and fixed by a long bolt, an oil cylinder middle body 5 with an oil distribution function is arranged between the front and the rear two-stage hydraulic cylinders, 2 oil-absorbing one-way valves and 2 oil-discharging one-way valves are arranged in the oil cylinder middle body 5 to separate oil absorption and oil discharge of the front and the rear two-stage hydraulic cylinders without mutual interference, the air cylinder and an oil cylinder good piston rod 8 are integrally designed, a piston of the rear oil cylinder is integrated on the piston rod, a front piston 3 and an air cylinder piston 13 of the front oil cylinder are fixed on the piston rod 8 by nuts, in order to prevent the air choke phenomenon in the operation process of the oil cylinder, vent holes are drilled on an oil cylinder front cover 9 and an oil cylinder rear cover 1 to be communicated with the atmosphere, sealing rings and guide belts are respectively arranged on the piston, the effect of mutual noninterference is achieved, and the push-pull reciprocating motion of the large-diameter cylinder is utilized to drive the piston of the oil cylinder to reciprocate so as to complete the oil absorption and oil outlet functions of the gas-liquid increasing device. When the piston rod moves forwards, the cavity of the rear hydraulic cylinder is reduced, hydraulic oil in the hydraulic cylinder is compressed and pushed out of the oil cylinder through the oil outlet one-way valve to enter the hydraulic valve group of the machine tool, and at the moment, under the action of high-pressure oil, the oil absorption one-way valve of the rear oil cylinder is closed, so that the high-pressure oil is prevented from leaking back to the oil tank. The containing cavity of the front oil cylinder is enlarged, vacuum occurs, the oil suction one-way valve of the front containing cavity is opened at the moment, hydraulic oil in the oil tank is sucked into the cylinder barrel through the oil suction one-way valve, and the oil outlet one-way valve of the front oil cylinder is closed under the action of high-pressure oil, so that the high-pressure oil of the rear oil cylinder is prevented from being mixed into the front oil cylinder. When the piston rod retreats, the cavity of the front hydraulic cylinder is reduced, the hydraulic oil in the cavity is compressed and pushed out of the oil cylinder through the oil outlet one-way valve to enter the hydraulic valve group of the machine tool, and at the moment, under the action of high-pressure oil, the oil absorption one-way valve of the front oil cylinder is closed, so that the high-pressure oil is prevented from leaking back to the oil tank. The containing cavity of the rear oil cylinder is enlarged to generate vacuum, the oil suction one-way valve of the rear containing cavity is opened at the moment, hydraulic oil in the oil tank is sucked into the cylinder barrel through the oil suction one-way valve, and the oil outlet one-way valve of the rear oil cylinder is closed under the action of high-pressure oil to prevent the high-pressure oil of the front oil cylinder from flowing into the front oil cylinder. The oil suction one-way valves and the oil outlet one-way valves of the front oil cylinder and the rear oil cylinder are integrated on the middle body of the oil cylinder and output through a main path, so that the number of the piping is reduced.
The actual operating conditions of the invention are as follows:
when high-pressure air is blown into the rear cavity of the cylinder barrel 12 to push the cylinder piston 13, the cylinder piston 13 pushes the piston rod 8 to move forwards, the piston rod 8 of the cylinder part drives the front and rear cylinder pistons to move forwards, the piston rod 8 (with a piston) of the rear cylinder part pushes hydraulic oil in the rear cylinder barrel 7 out of the cylinder through the oil outlet one-way valve at a certain pressure to enter a hydraulic valve group of a machine tool to drive the machine tool cylinder to operate, the front piston 3 simultaneously sucks hydraulic oil into the front cylinder barrel 2 through the oil suction one-way valve, when the cylinder piston is pushed to the bottom, the piston impacts the firing pin 14 on the cylinder cover, the pneumatic reversing valve 10 acts, the high-pressure air is blown into the front cavity of the cylinder barrel 12, the rear cavity of the cylinder is communicated with the air discharge hole, the cylinder piston 13 returns to the rear limit position of the cylinder under the pushing of the high-pressure air, at the moment, the cylinder piston rod drives the two cylinder pistons to When the valve group drives the machine tool oil cylinder to operate, the rear cylinder barrel 7 sucks hydraulic oil at the same time, when the air cylinder reaches the rear limiting position, the piston of the air cylinder impacts the firing pin 14 of the rear cover of the air cylinder, the pneumatic control valve 10 realizes reversing, the air cylinder moves forward repeatedly, and the operation is repeated in this way.
The gas-liquid conversion control device has the advantages that the two oil cylinders are driven by one air cylinder to perform staggered action, oil absorption and oil discharge are performed simultaneously, and the defect of oil supply interruption of the traditional supercharging device is overcome while the efficiency is improved. On the other hand, the energy consumption and the heat productivity of the device are greatly reduced.
Claims (3)
1. A pneumatic control valve, characterized in that: the pneumatic control valve is used for a pneumatic pressure conversion control device, the pneumatic pressure conversion control device is formed by combining a large-diameter cylinder and two small-diameter hydraulic cylinders connected in series from front to back, the cylinder drives the hydraulic cylinders through a piston rod connecting a cylinder piston and a hydraulic piston, the pneumatic valve core (19) is pushed to retreat to a rear limit position after high-pressure air enters an air inlet of the pneumatic control valve, the air inlet is communicated with the cylinder rear cavity (21), the cylinder front cavity (23) is communicated with the cylinder exhaust port (22), and the high-pressure air enters the cylinder rear cavity (21) and pushes the cylinder piston rod to advance, driving a piston rod of the air cylinder; the piston rod of the cylinder drives the front and the rear hydraulic cylinder pistons to advance forwards, the rear hydraulic cylinder pushes the internal hydraulic oil out of the hydraulic cylinders at a certain pressure and enters a hydraulic valve group of the machine tool, the front hydraulic cylinder sucks the hydraulic oil at the same time when driving the oil cylinder of the machine tool to operate, the front limit position of the cylinder is provided with a front thimble, when the piston of the cylinder contacts the front thimble, high-pressure air control airflow communicated with an air inlet is communicated with a rear cavity (25) of an air valve, the high-pressure air enters the rear cavity (25) of the air valve to push an air valve core (19) to advance to the front limit position, the high-pressure air is communicated with a front cavity (23) of the cylinder at the moment, the rear cavity (21) of the cylinder is communicated with an air outlet (22) of the cylinder, the high-pressure air enters the front cavity (23) of the cylinder to push the piston of the cylinder to, the piston of the cylinder impacts the rear thimble, the high-pressure gas in the rear cavity (25) of the gas valve is discharged, and the gas valve core (19) retreats.
2. A pneumatic control valve according to claim 1, wherein: the pneumatic control valve comprises a connecting channel which is provided with an air valve cylinder sleeve (18) and an air cylinder at the air cylinder connecting part at the two sides of an air cylinder piston rod, and the connecting channel is positioned at the two sides of an air valve core (19) and between the upper part and the lower part of the air cylinder piston rod and the contact wall of the cylinder body.
3. A pneumatic control valve according to claim 2, wherein: the connecting channel of the cylinder is connected with the front cavity (23) of the cylinder and the exhaust port (22) of the cylinder when the air valve core (19) is at the rear limit position, and is connected with the rear cavity (21) of the cylinder and the exhaust port (22) of the cylinder when the air valve core (19) is at the front limit position.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910443607.XA CN110285109B (en) | 2019-05-24 | 2019-05-24 | Pneumatic control valve and gas-liquid pressure conversion control device |
| PCT/CN2019/088518 WO2020237455A1 (en) | 2019-05-24 | 2019-05-27 | Pneumatic control valve and air-liquid pressure conversion control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910443607.XA CN110285109B (en) | 2019-05-24 | 2019-05-24 | Pneumatic control valve and gas-liquid pressure conversion control device |
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| CN110285109A CN110285109A (en) | 2019-09-27 |
| CN110285109B true CN110285109B (en) | 2020-09-04 |
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| CN201910443607.XA Active CN110285109B (en) | 2019-05-24 | 2019-05-24 | Pneumatic control valve and gas-liquid pressure conversion control device |
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| CN (1) | CN110285109B (en) |
| WO (1) | WO2020237455A1 (en) |
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| CN110714954B (en) * | 2019-10-25 | 2022-03-08 | 湖南中大创远数控装备有限公司 | Oil cylinder |
| CN111946250B (en) * | 2020-07-31 | 2022-03-01 | 中国石油天然气集团有限公司 | Gas-liquid coupling power conversion system for gas drilling |
| CN111946587B (en) * | 2020-08-24 | 2022-04-22 | 中国石油化工集团有限公司 | Self-pressure-discharging adjustable buffer gas pressure cylinder |
| CN111964900B (en) * | 2020-08-25 | 2023-11-24 | 浙江斯特隆科技有限公司 | Multipath pressure setting test bench |
| CN114294563A (en) * | 2021-12-29 | 2022-04-08 | 广东逸动科技有限公司 | Gas pressurization system and control method thereof |
| CN114670489A (en) * | 2022-05-18 | 2022-06-28 | 太重集团榆次液压工业(济南)有限公司 | Flexible pressure conveying device |
| CN116292169A (en) * | 2022-09-09 | 2023-06-23 | 富伟机械科技(淮安)有限公司 | Double-acting gas-liquid booster pump |
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| CN200952458Y (en) * | 2006-09-19 | 2007-09-26 | 天津开发区华英工贸有限公司 | Gas and liquid compound pump |
| CN101463844A (en) * | 2008-12-23 | 2009-06-24 | 大连海事大学 | Gas-saving type gas supercharger using double activation pistons |
| CN204061402U (en) * | 2014-08-13 | 2014-12-31 | 合肥长源液压股份有限公司 | Combined pneumatic oil hydraulic cylinder |
| CN205592212U (en) * | 2016-04-22 | 2016-09-21 | 济南弋泽展特机械有限公司 | Valve member convenient to installation |
| CN106438595A (en) * | 2016-11-21 | 2017-02-22 | 天津尚吉液压设备有限公司 | Novel adjustable pressure supply system |
| CN106523460A (en) * | 2016-12-06 | 2017-03-22 | 泸州长江液压密封件有限公司 | Pressure-intensified type hydraulic cylinder with a plurality of driving cavities |
| CN108518372A (en) * | 2018-06-07 | 2018-09-11 | 武汉科技大学 | A kind of combination valve of flow automatic regulation |
| CN209838800U (en) * | 2019-03-04 | 2019-12-24 | 南京蒙福液压机械有限公司 | Energy-saving gas-liquid pressurization control device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020237455A1 (en) | 2020-12-03 |
| CN110285109A (en) | 2019-09-27 |
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