CN109340443B - Miniaturized gas-liquid linkage actuator suitable for large-caliber valve and low-gas source - Google Patents
Miniaturized gas-liquid linkage actuator suitable for large-caliber valve and low-gas source Download PDFInfo
- Publication number
- CN109340443B CN109340443B CN201811519665.8A CN201811519665A CN109340443B CN 109340443 B CN109340443 B CN 109340443B CN 201811519665 A CN201811519665 A CN 201811519665A CN 109340443 B CN109340443 B CN 109340443B
- Authority
- CN
- China
- Prior art keywords
- gas
- liquid
- cylinder
- hydraulic
- shifting fork
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 184
- 230000005540 biological transmission Effects 0.000 claims abstract description 71
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 48
- 238000002955 isolation Methods 0.000 claims description 45
- 239000010985 leather Substances 0.000 claims description 33
- 230000007246 mechanism Effects 0.000 claims description 28
- 238000007789 sealing Methods 0.000 claims description 5
- 239000004429 Calibre Substances 0.000 claims 1
- 239000007789 gas Substances 0.000 description 61
- 239000012071 phase Substances 0.000 description 11
- 239000003921 oil Substances 0.000 description 7
- 238000009434 installation Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 230000001360 synchronised effect Effects 0.000 description 5
- 238000004806 packaging method and process Methods 0.000 description 4
- 239000007791 liquid phase Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000003749 cleanliness Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
- F16K31/124—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston servo actuated
-
- 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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/06—Servomotor systems without provision for follow-up action; Circuits therefor involving features specific to the use of a compressible medium, e.g. air, steam
- F15B11/072—Combined pneumatic-hydraulic systems
-
- 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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Actuator (AREA)
Abstract
The invention discloses a miniaturized gas-liquid linkage actuator suitable for a large-caliber valve and a low-gas source, which comprises a shifting fork transmission box, a gas-liquid tank group, a hydraulic actuating element and at least one pneumatic actuating element, wherein each gas-liquid tank group consists of two gas-liquid tanks, gas inlets and gas outlets of a tank body are connected with a pneumatic control system through a gas path pipeline, and two gas inlet and outlet interfaces of the pneumatic actuating element are connected with the pneumatic control system through the gas path pipeline; the pneumatic actuator and the hydraulic actuator are arranged on one side of the shifting fork transmission case in series or respectively arranged on two sides of the shifting fork transmission case, the hydraulic actuator is particularly suitable for the condition that the air source pressure is 0.6-1.2 MPa, the hydraulic actuator and the pneumatic actuator can continuously output hydraulic oil through the air liquid tank to drive the hydraulic oil cylinder to act on the valve, meanwhile, the pneumatic output drives the cylinder to act on the valve, the output thrust of the cylinder and the output thrust of the hydraulic oil cylinder are overlapped in series, and the output force is increased multiple times.
Description
Technical Field
The invention relates to the technical field of application of a gas-liquid linkage actuator under a low-gas-source working condition, in particular to a miniaturized gas-liquid linkage actuator suitable for a large-caliber valve and a low-gas source.
Background
Under the specific conditions of multiple branches of town gas and natural gas pipelines, unstable operating pressure and gas consumption, when the gas-liquid linkage actuator is required to meet the minimum working pressure of 0.6MPa and the minimum working pressure of the pipelines is met, or the gas source pressure is lower, if the valve is required to be normally opened and closed, the remote and local control of the actuator and the emergency valve closing function can be realized under the minimum pressure, the traditional gas-liquid linkage actuator adopts a valve with large driving caliber and large torque, then the actuator of a large-size and large-cylinder-diameter hydraulic cylinder is required to be selected, the enlarged gas-liquid tank is selected, more hydraulic oil is filled, the overall size and the volume of the gas-liquid tank are required to be increased, the actuator occupies a large amount of space, the packaging, the transportation and the installation are inconvenient, the fluctuation frequency of the gas source pressure cannot be realized, the synchronous transmission of gas and oil cannot be realized, and the unidirectional output force of the hydraulic cylinder is limited.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a miniaturized gas-liquid linkage actuator suitable for a large-caliber valve and a low gas source.
The aim of the invention is realized by the following technical scheme:
the miniaturized gas-liquid linkage actuator suitable for the large-caliber valve and the low gas source comprises a shifting fork transmission box, a gas-liquid tank group, a hydraulic actuating element and at least one pneumatic actuating element, wherein each gas-liquid tank group consists of two gas-liquid tanks, each gas-liquid tank comprises a tank body, a gas inlet and a gas outlet arranged at one end of the tank body and a liquid inlet and a liquid outlet arranged at the other end of the tank body, the gas inlet and the gas outlet are connected with a pneumatic control system through a first gas pipeline, the liquid inlet and the liquid outlet of one gas-liquid tank are communicated with the first liquid inlet and the liquid outlet of the hydraulic actuating element through a liquid pipeline, and the liquid inlet and the liquid outlet of the other gas-liquid tank are communicated with the second liquid inlet and the liquid outlet of the hydraulic actuating element through a liquid pipeline;
the two air inlet and outlet interfaces of the pneumatic execution element are connected with a second pneumatic control system through a second air path pipeline;
the pneumatic executive component and the hydraulic executive component are arranged on the same side of the shifting fork transmission case in series; or the pneumatic executing element is arranged on one side of the shifting fork transmission case, and the hydraulic executing element is arranged on the other side of the shifting fork transmission case;
the output mechanism of the pneumatic execution element and the output mechanism of the hydraulic execution element are coaxially connected to form a shifting fork transmission block, a shifting fork driving sliding block is arranged on the shifting fork transmission block, and a bar-shaped sliding groove matched with the shifting fork driving sliding block is arranged on a shifting fork of the shifting fork transmission box.
Further, when the pneumatic actuator is mounted on one side of the shifting fork transmission box and the hydraulic actuator is mounted on the other side of the shifting fork transmission box, the output mechanism of the pneumatic actuator and the output mechanism of the hydraulic actuator are connected in opposite directions.
Further, when the pneumatic execution element and the hydraulic execution element are installed on the same side of the shifting fork transmission box in series, the output mechanism of the pneumatic execution element and the output mechanism of the hydraulic execution element are connected in the same direction and coaxially to form a shifting fork transmission block, and the shifting fork driving sliding block is arranged at the top of the shifting fork transmission block.
Further, the hydraulic actuating element is a hydraulic cylinder, an output mechanism of the hydraulic cylinder is a first piston rod, the hydraulic cylinder comprises a first cylinder body and a first cylinder seat, the first cylinder body is arranged on a box body of the shifting fork transmission box through the first cylinder seat, and the first piston rod penetrates through the first cylinder seat to be linked with a shifting fork of the shifting fork transmission box.
Further, the pneumatic actuating element is a cylinder, the output mechanism of the cylinder is a second piston rod, the cylinder comprises a second cylinder body and a second cylinder seat, the second cylinder body is arranged on the box body of the shifting fork transmission box through the second cylinder seat, and the second piston rod passes through the second cylinder seat to be linked with the shifting fork of the shifting fork transmission box.
Further, the pneumatic actuating element is a cylinder, the output mechanism of the cylinder is a second piston rod, the cylinder comprises a second cylinder body, the second piston rod penetrates through the bottom surface of the first cylinder body to be connected with the piston of the first piston rod, and the second cylinder body is in sealing connection with the first cylinder body.
Further, the first pneumatic control system and the second pneumatic control system are mutually independent pneumatic control systems.
The first pneumatic control system and the second pneumatic control system are a set of pneumatic control system which is shared, a three-way joint is arranged on the first air passage pipeline, and the air inlet and outlet interface is connected with the three-way joint through the second air passage pipeline.
Further, the gas-liquid tank is provided with an isolation leather bag, an opening of the isolation leather bag is hermetically arranged on the gas inlet and outlet, the isolation leather bag isolates the inner cavity of the tank into a gas cavity and a liquid cavity, the gas cavity is arranged inside the tank, and the liquid cavity is arranged outside the tank; or the gas-liquid tank is provided with an isolation leather bag, an opening of the isolation leather bag is hermetically arranged on the liquid inlet and outlet, the isolation leather bag isolates the inner cavity of the tank into a gas cavity and a liquid cavity, the inner part of the tank is the liquid cavity, and the outer part of the tank is the gas cavity.
Further, the liquid inlet and outlet of the gas-liquid tank is communicated with the hydraulic oil cylinder through a hydraulic oil channel, and a hydraulic manual pump is arranged on the hydraulic oil channel and comprises a gas-liquid/manual pump selection valve, a manual pump switch and a manual pump.
The beneficial effects of the invention are as follows:
1) The gas-liquid linkage actuator disclosed by the invention is particularly suitable for working under the condition that the gas source pressure is 0.6-1.2 MPa, the hydraulic actuator and the pneumatic actuator can continuously output hydraulic oil through the gas-liquid tank and drive the hydraulic cylinder action valve through the power gas no matter what serial installation mode is adopted, and meanwhile, the pneumatic output is used for driving the cylinder action valve, the output thrust of the cylinder and the output thrust of the hydraulic cylinder are overlapped in series, and the output force is doubled or multiplied.
2) The traditional working mode that the gas-liquid linkage actuator is driven by a hydraulic system is changed, the effective volume of the gas-liquid tank and the filling amount of hydraulic oil are reduced, and the gas-liquid linkage actuator only needs to fill the gas-liquid tank correspondingly according to the actual requirement of the hydraulic oil cylinder.
3) The high-pressure gas after gas compression is used as an elastic element to expand outwards to apply work, the pressure of the compressed gas source is transmitted to an executing element through the liquid serving as a transmission medium and the like, and meanwhile, the working performance and the action reliability of the gas-liquid linkage executing element are still reserved due to the stability of a hydraulic system.
4) The pneumatic hydraulic actuator can effectively solve the problems of large-caliber valves and low air source conditions, and after the pneumatic hydraulic actuator with the piston cylinder and the hydraulic superposition is adopted, the power output force can be increased by using a larger cylinder, and the pneumatic hydraulic actuator can realize the pneumatic hydraulic linkage by using a smaller cylinder, so that the pneumatic hydraulic superposition, stable work and synchronous transmission can be realized. Thereby reducing the overall dimension and volume of the gas-liquid tank. The space occupation of the actuator is also reduced. The application working condition and the air source application range of the product of the type and the convenience of packaging, transportation and installation are also expanded.
5) Because the pneumatic-hydraulic linkage actuator is basically provided with the hydraulic manual pump for preparing the valve switch under the emergency, the manual pump is used for switching the valve by driving the piston of the hydraulic cylinder, the size of the hydraulic cylinder determines the speed and time of the valve switch under the emergency, after a novel hydraulic cylinder with a small hydraulic cylinder is adopted, the action speed of the actuator can be accelerated, the time of the valve switch is shortened, and the response under the emergency is improved.
Drawings
FIG. 1 is a schematic structural view of embodiment 1 of the present invention;
FIG. 2 is a schematic diagram of the connection structure of the hydraulic cylinder and the angular travel gas-liquid linkage actuator according to embodiment 1 of the present invention;
FIG. 3 is a schematic structural view of embodiment 2 of the present invention;
FIG. 4 is a schematic diagram of embodiment 1 of the present invention;
FIG. 5 is a schematic diagram of embodiment 3 of the present invention;
fig. 6 is a schematic structural view of embodiment 4 of the present invention;
FIG. 7 is a schematic view of the connection structure of the hydraulic cylinder and the angular travel gas-liquid linkage actuator according to embodiment 4 of the present invention;
fig. 8 is a schematic structural view of embodiment 5 of the present invention;
FIG. 9 is a schematic diagram of embodiment 4 of the present invention;
FIG. 10 is a schematic diagram of embodiment 6 of the present invention;
in the figure, a 1-shifting fork transmission case, a 2-gas-liquid tank, a 2.1-tank body, a 2.2-gas inlet and outlet, a 2.3-liquid inlet and outlet, a 2.4-isolation leather bag, a 3-hydraulic oil cylinder, a 3.1-first cylinder body, a 3.2-first piston rod, a 3.3-first cylinder seat, a 4-cylinder, a 4.1-second cylinder body, a 4.2-second piston rod, a 5-first gas source pipeline, a 6-second gas source pipeline, a 7-hydraulic manual pump, a 7.1-gas-liquid/manual pump selection valve, a 7.2-manual pump switch, a 7.3-manual pump 8-shifting fork, a 9-bar-shaped chute, a 10-shifting fork driving sliding block, a 11-filter and a 12-speed regulating valve.
Detailed Description
The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by a person skilled in the art without any inventive effort, are intended to be within the scope of the present invention, based on the embodiments of the present invention.
Referring to fig. 1-10, the present invention provides a technical solution:
the miniaturized gas-liquid linkage actuator suitable for a large-caliber valve and a low gas source comprises a shifting fork transmission box 1, a gas-liquid tank group, a hydraulic actuating element and at least one pneumatic actuating element, wherein each gas-liquid tank group consists of two gas-liquid tanks 2, each gas-liquid tank 2 comprises a tank body 2.1, a gas inlet and outlet 2.2 arranged at one end of the tank body 2.1 and a liquid inlet and outlet 2.3 arranged at the other end of the tank body 2.1, the gas inlet and outlet 2.2 is connected with a pneumatic control system through a first gas pipeline 5, the liquid inlet and outlet 2.3 of one gas-liquid tank 2 is communicated with a first liquid inlet and outlet of the hydraulic actuating element through a liquid pipeline, and the liquid inlet and outlet 2.3 of the other gas-liquid tank 2 is communicated with a second liquid inlet and outlet of the hydraulic actuating element through a liquid pipeline;
the two air inlet and outlet interfaces of the pneumatic execution element are connected with a second pneumatic control system through a second air channel pipeline 6;
the pneumatic executive component and the hydraulic executive component are arranged on the same side of the shifting fork transmission case 1 in series to form an integrally overlapped gas-liquid two-phase medium synchronous output gas-liquid linkage actuator; or the pneumatic actuating element is arranged on one side of the shifting fork transmission case 1, the hydraulic actuating element is arranged on the other side of the shifting fork transmission case 1, and the pneumatic-hydraulic linkage actuator for synchronously outputting gas-liquid two-phase media in a split stacked mode is formed.
The output mechanism of the pneumatic execution element and the output mechanism of the hydraulic execution element are coaxially connected to form a shifting fork transmission block, a shifting fork driving sliding block 10 is arranged on the shifting fork transmission block, and a bar-shaped sliding groove 9 matched with the shifting fork driving sliding block 10 is arranged on a shifting fork 8 of the shifting fork transmission box 1.
Example 1
As shown in fig. 1, the pneumatic actuator is mounted on one side (left side in fig. 1) of the shift fork transmission case 1, the hydraulic actuator is mounted on the other side (right side in fig. 1) of the shift fork transmission case 1, the output mechanism of the pneumatic actuator and the output mechanism of the hydraulic actuator are connected in opposite directions, a shift fork driving slide block 10 is arranged on the shift fork transmission block, and a bar-shaped slide slot 9 matched with the shift fork driving slide block 10 is arranged on a shift fork 8 of the shift fork transmission case 1.
The hydraulic actuating element is a hydraulic cylinder 3, an output mechanism of the hydraulic cylinder 3 is a first piston rod 3.2, the hydraulic cylinder 3 comprises a first cylinder body 3.1 and a first cylinder seat 3.3, the first cylinder body 3.1 is arranged on a box body of the shifting fork transmission box 1 through the first cylinder seat 3.3, and the first piston rod 3.2 passes through the first cylinder seat 3.3 to be linked with a shifting fork 8 of the shifting fork transmission box 1.
The hydraulic cylinder is characterized in that a liquid inlet and outlet 2.3 of the gas-liquid tank 2 is communicated with the hydraulic cylinder 3 through a hydraulic oil channel, a hydraulic manual pump 7 is arranged between the gas-liquid tank 2 and a liquid path pipeline, a gas-liquid/manual pump selection valve 7.1 and a manual pump switch 7.2 are arranged on the hydraulic manual pump 7, a filter 11 and a speed regulating valve 12 are arranged on an external pipeline of the liquid inlet and outlet 2.3 of the tank body 2.1 and used for regulating the flow rate of hydraulic oil, so that the pressure release speed is controlled, the accurate and controllable elastic movement process and action speed are ensured, and a pressure gauge used for monitoring the internal pressure of the tank body 2.1 in real time is further arranged on the upper part of the tank body for detecting the air pressure.
The pneumatic actuating element is a cylinder 4, an output mechanism of the cylinder 4 is a second piston rod 4.2, the cylinder 4 comprises a second cylinder body 4.1 and a second cylinder seat 3.3, the second cylinder body 4.1 is arranged on a box body of the shifting fork transmission box 1 through the second cylinder seat 3.3, and the second piston rod 4.2 passes through the second cylinder seat 4.3 to be linked with a shifting fork 8 of the shifting fork transmission box 1.
The cylinder 4 and the hydraulic cylinder 3 are thus separately installed at both sides of the fork gear box 1.
The hydraulic cylinder is connected in series with the cylinder by adopting a split structure without changing the structure of the hydraulic cylinder, the power gas continuously outputs hydraulic oil through the gas-liquid tank and drives the hydraulic cylinder to act as a valve, meanwhile, the pneumatic output drives the cylinder to act as a valve, the output thrust of the cylinder and the output thrust of the hydraulic cylinder are connected in series and overlapped, and the output force is doubled or multiplied.
At this time, as shown in fig. 2, the first piston rod 3.2 and the second piston rod 4.2 are coaxially connected to form a shift fork driving block, and a shift fork driving slider 10 matched with the bar-shaped chute 9 is arranged on the shift fork driving block.
The first pneumatic control system and the second pneumatic control system are a set of pneumatic control system which is shared, the first air passage pipeline 5 is provided with a three-way joint, and the air inlet and outlet interface is connected with the three-way joint through the second air passage pipeline 6, and the specific operation is as follows: when the system is in piping, the hydraulic output port of the gas-liquid tank 2 in the opening/closing direction is connected with the inlet of the corresponding hydraulic cylinder on/off side, simultaneously, three-way pipes are respectively additionally arranged on the gas source input side of the gas-liquid tank 2 in the opening/closing direction, the second gas source pipeline 6 which is output in parallel is connected with the inlet of the corresponding cylinder on/off side, when the system works, the opening-direction power gas source drives the hydraulic oil output of the gas-liquid tank 2 to drive the hydraulic cylinder 3 to move in the opening direction, the parallel opening-direction power gas source on the inlet side of the gas-liquid tank 2 enters the cylinder 4, and the cylinder 4 is driven to move in the opening direction synchronously.
The scheme of the invention effectively solves the problems of the application of the gas-liquid linkage actuator under the conditions of a large-caliber valve and a low gas source, after the novel gas-liquid linkage actuator with pneumatic and hydraulic superposition of a piston cylinder is adopted, the power output force can be increased by making a cylinder larger, the gas-liquid linkage is realized by making a hydraulic cylinder smaller, under the condition of a first gas source, the power gas continuously outputs hydraulic oil through a gas-liquid tank to drive the hydraulic cylinder to act the valve, and meanwhile, the pneumatic output is used for driving the cylinder to act the valve, the output thrust of the cylinder and the output thrust of the hydraulic cylinder are superposed in series, the output force is doubled or multiplied multiple, and the gas-liquid superposition, stable work and synchronous transmission are realized. Thereby reducing the overall dimension and the volume of the gas-liquid tank and also reducing the space occupation of the actuator. The application working condition and the air source application range of the product of the type and the convenience of packaging, transportation and installation are also expanded.
Of course, the invention is particularly suitable for the environment with the air source pressure of 0.6-1.2 MPa, but is not limited to the air source pressure range.
The mounting positions of the cylinder 4 and the hydraulic cylinder 3 in the embodiment 1 are interchangeable.
As shown in fig. 4, the principle of the present invention is as follows:
working condition 1: the pneumatic control system controls the right air liquid tank 2 to enter air, when the air pressure of the right air liquid tank 2 is increased, hydraulic oil in the right isolation tank expands, hydraulic oil in the right isolation tank is extruded, oil is fed into the cylinder body of the right hydraulic oil cylinder 3, meanwhile, the air pressure of the left air liquid tank 2 is reduced, hydraulic oil in the left isolation tank contracts, hydraulic oil in the cylinder body of the left hydraulic oil cylinder is extruded into the left air liquid tank 2, a piston in the hydraulic oil cylinder 3 pushes a piston rod 3.2 to move leftwards, a shifting fork is pushed by the piston rod to open a valve, meanwhile, an air source pipeline 6 which is connected in parallel and controls the same air source pipeline 5 for the air inlet of the right air liquid tank 2 is connected with the input end of the cylinder 4, leftward power is provided for the cylinder 4, the piston rod 4.2 of the cylinder 4 is pushed to move leftwards simultaneously, so that on the transmission power is opened to output thrust force to the hydraulic oil cylinder 3, the thrust output force is overlapped with the serial cylinders 4, the output power is doubled or multiple times increased, and in terms of transmission stability, the hydraulic oil cylinder 3 and the cylinders 4 are connected in series, balanced mutually and restricted together. The speed is stable, the transmission is stable, and the advantages of the pneumatic and hydraulic are complemented.
Working condition 2: the pneumatic control system controls the left air liquid tank 2 to enter air, when the air pressure of the left air liquid tank 2 is increased, hydraulic oil in the right isolation tank expands, hydraulic oil in the left isolation tank is extruded, oil is fed into the cylinder body of the left hydraulic oil cylinder 3, meanwhile, the air pressure of the right air liquid tank 2 is reduced, hydraulic oil in the right isolation tank or contracts, hydraulic oil in the cylinder body of the right hydraulic oil cylinder is extruded into the right air liquid tank 2, a piston in the hydraulic oil cylinder 3 pushes a piston rod 3.2 to move rightwards, the piston rod pushes a shifting fork to open a valve, meanwhile, an air source pipeline 6 connected in parallel with an air source pipeline 5 controlling the air inlet of the left air liquid tank 2 is connected with the input end of the cylinder 4, right power is provided for the cylinder 4, the piston rod 4.2 of the cylinder 4 is pushed to move rightwards simultaneously, so that in terms of transmission force, the thrust is output to the hydraulic oil cylinder 3, the thrust output force is overlapped with the serial cylinder 4, the output force is doubled or multiple times increased, and in terms of transmission stability, the hydraulic oil cylinder 3 and the cylinder 4 are serially connected together, balanced mutually and restricted together. The speed is stable, the transmission is stable, and the advantages of the pneumatic and hydraulic are complemented.
Example 2
As shown in fig. 3, the embodiment 2 is different from the embodiment 1 in that an isolation leather bag 2.4 is arranged in the gas-liquid tank 2, an opening of the isolation leather bag 2.4 is hermetically arranged on the gas inlet and outlet 2.2, the isolation leather bag 2.4 isolates the inner cavity of the tank body 2.1 into a gas cavity and a liquid cavity, the gas cavity is arranged inside, and the liquid cavity is arranged outside.
Preferably, the air inlet and outlet 2.2 and the liquid inlet and outlet 2.3 are respectively provided with a connecting joint, and the isolation leather bag 2.4 is connected with the connecting joints through a sealing assembly.
The working principle is as follows:
working condition 1: the pneumatic control system controls the right air liquid tank 2 to enter air, when the air pressure of the right air liquid tank 2 is increased, the isolation leather bag 2.4 in the isolation tank on the right is expanded, hydraulic oil in the isolation tank on the right is extruded, oil is fed into the cylinder body of the hydraulic cylinder 3 on the right, meanwhile, the air pressure of the left air liquid tank 2 is reduced, the isolation leather bag 2.4 in the isolation tank on the left is contracted, hydraulic oil in the cylinder body of the hydraulic cylinder on the left is extruded into the left air liquid tank 2, a piston in the hydraulic cylinder 3 pushes a piston rod 3.2 to move leftwards, the piston rod pushes a shifting fork to open a valve, meanwhile, an air source pipeline 6 which is connected in parallel with an air source pipeline 5 and controls the air inlet of the right air liquid tank 2 is connected with the input end of the cylinder 4 to provide leftwards power for the cylinder 4, so that the piston rod 4.2 of the cylinder 4 is pushed to move leftwards simultaneously, on the transmission power is opened to the hydraulic cylinder 3 to output thrust force, the output thrust force and is overlapped with the serial cylinder 4 to form force, the output force is doubled or multiple times increased, and in terms of transmission stability, the hydraulic cylinder 3 and the cylinder 4 are serially connected together, balanced and jointly restricted. The speed is stable, the transmission is stable, and the advantages of the pneumatic and hydraulic are complemented.
Working condition 2: the pneumatic control system controls the left air liquid tank 2 to enter air, when the air pressure of the left air liquid tank 2 is increased, the isolation leather bag 2.4 in the isolation tank on the right is expanded, hydraulic oil in the isolation tank on the left is extruded, oil is fed into the cylinder body of the hydraulic cylinder 3 on the left, meanwhile, the air pressure of the right air liquid tank 2 is reduced, the isolation leather bag 2.4 in the isolation tank on the right is contracted, hydraulic oil in the cylinder body of the hydraulic cylinder on the right is extruded into the right air liquid tank 2, a piston in the hydraulic cylinder 3 pushes a piston rod 3.2 to move rightwards, the piston rod pushes a shifting fork to open a valve, meanwhile, an air source pipeline 6 which is connected in parallel with an air source pipeline 5 and is used for controlling the air inlet of the left air liquid tank 2 is connected with the input end of the cylinder 4 to provide rightwards power for the cylinder 4, so that the piston rod 4.2 of the push cylinder 4 moves rightwards simultaneously, in the transmission power is opened to the hydraulic cylinder 3 to output thrust, the output thrust force and the output force of the tandem cylinder 4 is overlapped, the output power is doubled or multiplied multiple times, the output power is balanced and restrained together in terms of transmission stability. The speed is stable, the transmission is stable, and the advantages of the pneumatic and hydraulic are complemented.
The isolation leather bags 2.4 are used, the adjustable space in the gas-liquid tank 2 is more abundant, the pressure of liquid can be buffered by high-pressure gas transmission, so that the problems of less oil injection, emulsification of oil gas and the like can be avoided, the isolation leather bags with the structure are arranged in the gas-liquid tank, the structure is simple, the beneficial effects brought are really and multifaceted, the stability, the cleanliness and the pollution resistance of hydraulic oil are improved to a great extent after the working gas and the hydraulic oil are isolated, and the problems that gas-liquid linkage actuator products cannot be completely placed horizontally or placed horizontally in the processes of design, layout, installation, use, packaging, transportation and the like and only can be vertically or obliquely upwards placed are solved.
Further preferably, the gas-liquid tank 2 is provided with an isolation leather bag 2.4, an opening of the isolation leather bag 2.4 is hermetically arranged on the liquid inlet and outlet 2.3, the isolation leather bag 2.4 isolates the inner cavity of the tank body 1 into a gas cavity and a liquid cavity, the inner part is the liquid cavity, and the outer part is the gas cavity.
Example 3
As shown in fig. 5, embodiment 2 is different from embodiment 1 in that the first pneumatic control system and the second pneumatic control system are independent pneumatic control systems. The principle is the same as in example 1.
Example 4
As shown in fig. 6, the difference from embodiment 1 is that: the output mechanism of the pneumatic actuator and the output mechanism of the hydraulic actuator are connected in the same direction and coaxially to form a shifting fork driving block, a shifting fork driving sliding block 10 is arranged on the shifting fork 8 of the shifting fork driving box 1, a bar-shaped sliding groove 9 matched with the shifting fork driving sliding block 10 is arranged on the shifting fork 8 of the shifting fork driving box 1, the shifting fork driving sliding block 10 is arranged on the output mechanism of the actuator close to the shifting fork driving box 1, the actuator close to the shifting fork driving box 1 is arranged to be a hydraulic cylinder 3, as shown in fig. 7, the pneumatic actuator is a cylinder as in the embodiment 1, the pneumatic actuator is a cylinder 4, the output mechanism of the cylinder 4 is a second piston rod 4.2, the cylinder 4 comprises a second cylinder body 4.1, the second piston rod 4.2 penetrates through the bottom surface of the first cylinder body 3.1 and is connected with the piston of the first piston rod 3.2, and the second cylinder body 4.1 is connected with the first cylinder body 3.1 in a sealing mode, so that the cylinder is connected to the right side of the hydraulic cylinder 3, and the cylinder body are formed into an integral structure, and the hydraulic cylinder is convenient to install and use.
The hydraulic cylinder 3 also adopts the structure of embodiment 1.
The first pneumatic control system and the second pneumatic control system in embodiment 4 are a set of pneumatic control system in common, the first air passage pipeline 5 is provided with a three-way joint, and the air inlet and outlet interface is connected with the three-way joint through the second air passage pipeline 6. The concrete piping is the same as in example 1, and as shown in fig. 9, the principle is the same as in example 1.
Example 5
As shown in fig. 8, embodiment 5 is different from embodiment 2 in that the hydraulic cylinder 3 and the cylinder 4 are connected in series in embodiment 4, and the hydraulic cylinder 3 and the cylinder 4 are connected in series on the same side of the fork transmission case 1, and the principle is the same as that of embodiment 1.
Example 6
As shown in fig. 10, embodiment 6 is different from embodiment 4 in that the gas-liquid tank 2 is provided with an isolation leather bag 2.4, the opening of the isolation leather bag 2.4 is sealed and installed on the gas inlet and outlet 2.2, the isolation leather bag 2.4 isolates the inner cavity of the tank body 2.1 into a gas cavity and a liquid cavity, the gas cavity is arranged inside, and the liquid cavity is arranged outside.
Preferably, the air inlet and outlet 2.2 and the liquid inlet and outlet 2.3 are respectively provided with a connecting joint, and the isolation leather bag 2.4 is connected with the connecting joints through a sealing assembly.
Of course, the installation mode of the isolation leather bag 2.4 can also be adopted: the opening of the isolation leather bag 2.4 is hermetically arranged on the liquid inlet and outlet 2.3, the isolation leather bag 2.4 isolates the inner cavity of the tank body 1 into a gas cavity and a liquid cavity, the liquid cavity is arranged inside, and the gas cavity is arranged outside.
The principle is the same as in example 2.
The cylinders in embodiment 4, embodiment 5 and embodiment 6 may be provided in 2 or more in series with the hydraulic cylinder 3.
In the whole working and running process of the gas-liquid control system, the gas-liquid tank is not only a junction tank for changing gas-liquid two-phase medium, but also a conversion tank for realizing the conversion of gas-phase power into liquid-phase power transmission, and is also a gas-liquid two-phase transmission medium, a gas path system and a water diversion ridge of a hydraulic circuit. The gas-liquid two-phase medium is defined by a gas-liquid tank: the upstream of the gas-liquid tank is gas, and the downstream of the gas-liquid tank is liquid; the gas-liquid loop is defined by a gas-liquid tank: the upstream loop of the gas-liquid tank is pneumatically controlled, and the downstream loop of the gas-liquid tank is hydraulically controlled. The gas tank is used for inputting controlled power gas and gas phase; the gas-liquid tank outputs isobaric hydraulic oil to the hydraulic oil cylinder, and the medium is liquid and is liquid phase output. There is no gas output in the gas phase.
The invention fully utilizes the special function of mutual intersection of two-phase media in a gas-liquid tank, and outputs and synchronizes the gas-phase power gas source from the upstream of the gas-liquid tank to two pneumatic piston cylinders or cylinder interfaces and a hydraulic piston cylinder or hydraulic cylinder interface which are connected in series respectively in the form of gas-phase media and liquid-phase media after the gas-liquid tank is converted, converged and intermediated. Thereby realizing synchronous movement of the piston cylinders (the air cylinders and the hydraulic oil cylinders) connected in series and achieving stable, uniform speed and balanced output.
The piston cylinder described here can also be other pneumatic and hydraulic actuators of similar function. And (5) overlapping and installing and synchronously using.
In a pneumatic-hydraulic transmission loop of a traditional gas-liquid linkage actuator, after a power gas source is input into a gas-liquid tank, only one output loop and hydraulic oil are output from the gas-liquid tank; and an output medium: and outputting hydraulic pressure.
The device comprises an air source and control system, an air liquid tank, an air inlet of the air liquid tank, an air outlet of the air liquid tank and a liquid outlet of the air liquid tank, wherein the air piston cylinder (air cylinder) and the hydraulic piston cylinder (hydraulic cylinder) are connected in series, and a shifting fork box is arranged.
The foregoing is merely a preferred embodiment of the invention, and it is to be understood that the invention is not limited to the form disclosed herein but is not to be construed as excluding other embodiments, but is capable of numerous other combinations, modifications and environments and is capable of modifications within the scope of the inventive concept, either as taught or as a matter of routine skill or knowledge in the relevant art. And that modifications and variations which do not depart from the spirit and scope of the invention are intended to be within the scope of the appended claims.
Claims (7)
1. The utility model provides a miniaturized gas-liquid linkage executor suitable for heavy-calibre valve, low air supply which characterized in that: the hydraulic control device comprises a shifting fork transmission case (1), a gas-liquid tank group, a hydraulic execution element and at least one pneumatic execution element, wherein each gas-liquid tank group consists of two gas-liquid tanks (2), each gas-liquid tank (2) comprises a tank body (2.1), a gas inlet and outlet (2.2) arranged at one end of the tank body (2.1) and a liquid inlet and outlet (2.3) arranged at the other end of the tank body (2.1), the gas inlet and outlet (2.2) is connected with a first pneumatic control system through a first gas pipeline (5), the gas inlet and outlet (2.3) of one gas-liquid tank (2) is communicated with a first liquid inlet and outlet of the hydraulic execution element through a liquid pipeline, and the gas inlet and outlet (2.3) of the other gas-liquid tank (2) is communicated with a second liquid inlet and outlet of the hydraulic execution element through a liquid pipeline;
the two air inlet and outlet interfaces of the pneumatic execution element are connected with a second pneumatic control system through a second air channel pipeline (6);
the pneumatic executive component and the hydraulic executive component are arranged on the same side of the shifting fork transmission case (1) in series; or the pneumatic executing element is arranged on one side of the shifting fork transmission case (1), and the hydraulic executing element is arranged on the other side of the shifting fork transmission case (1);
the output mechanism of the pneumatic execution element and the output mechanism of the hydraulic execution element are coaxially connected to form a shifting fork transmission block, a shifting fork driving sliding block (10) is arranged on the shifting fork transmission block, and a bar-shaped sliding groove (9) matched with the shifting fork driving sliding block (10) is arranged on a shifting fork (8) of the shifting fork transmission box (1);
the hydraulic actuating element is a hydraulic cylinder (3), an output mechanism of the hydraulic cylinder (3) is a first piston rod (3.2), the hydraulic cylinder (3) comprises a first cylinder body (3.1) and a first cylinder seat (3.3), the first cylinder body (3.1) is arranged on a box body of the shifting fork transmission box (1) through the first cylinder seat (3.3), and the first piston rod (3.2) passes through the first cylinder seat (3.3) to be linked with a shifting fork (8) of the shifting fork transmission box (1);
the pneumatic actuating element is an air cylinder (4), an output mechanism of the air cylinder (4) is a second piston rod (4.2), the air cylinder (4) comprises a second cylinder body (4.1) and a second cylinder seat (3.3), the second cylinder body (4.1) is arranged on a box body of the shifting fork transmission box (1) through the second cylinder seat (3.3), and the second piston rod (4.2) passes through the second cylinder seat (4.3) to be linked with a shifting fork (8) of the shifting fork transmission box (1);
or, pneumatic executive component is cylinder (4), the output mechanism of cylinder (4) is second piston rod (4.2), cylinder (4) include second cylinder body (4.1), second piston rod (4.2) pass the bottom surface of first cylinder body (3.1) with the piston connection of first piston rod (3.2), second cylinder body (4.1) and first cylinder body (3.1) sealing connection.
2. The miniaturized gas-liquid linkage actuator suitable for large-caliber valves and low-gas sources as claimed in claim 1, wherein: the pneumatic actuator is arranged on one side of the shifting fork transmission case (1), the hydraulic actuator is arranged on the other side of the shifting fork transmission case (1), and the output mechanism of the pneumatic actuator is connected with the output mechanism of the hydraulic actuator in opposite directions.
3. The miniaturized gas-liquid linkage actuator suitable for large-caliber valves and low-gas sources as claimed in claim 1, wherein: the pneumatic actuator and the hydraulic actuator are arranged on the same side of the shifting fork transmission box (1) in series, the output mechanism of the pneumatic actuator and the output mechanism of the hydraulic actuator are connected in the same direction, and the shifting fork driving sliding block (10) is arranged at the top of the shifting fork transmission block.
4. The miniaturized gas-liquid linkage actuator suitable for large-caliber valves and low-gas sources as claimed in claim 1, wherein: the first pneumatic control system and the second pneumatic control system are mutually independent pneumatic control systems.
5. The miniaturized gas-liquid linkage actuator suitable for large-caliber valves and low-gas sources as claimed in claim 1, wherein: the first pneumatic control system and the second pneumatic control system are a set of pneumatic control system which is shared, a three-way joint is arranged on the first air passage pipeline (5), and the air inlet and outlet interface is connected with the three-way joint through the second air passage pipeline (6).
6. The miniaturized gas-liquid linkage actuator suitable for a large-caliber valve and a low gas source according to any one of claims 1-5, wherein: an isolation leather bag (2.4) is arranged in the gas-liquid tank (2), an opening of the isolation leather bag (2.4) is hermetically arranged on the gas inlet and outlet (2.2), the isolation leather bag (2.4) isolates the inner cavity of the tank body (2.1) into a gas cavity and a liquid cavity, the gas cavity is arranged in the tank body, and the liquid cavity is arranged outside the tank body; or the gas-liquid tank (2) is provided with an isolation leather bag (2.4), the opening of the isolation leather bag (2.4) is hermetically arranged on the liquid inlet and outlet (2.3), the isolation leather bag (2.4) isolates the inner cavity of the tank body (2.1) into a gas cavity and a liquid cavity, the liquid cavity is arranged inside the tank body, and the gas cavity is arranged outside the tank body.
7. The miniaturized gas-liquid linkage actuator suitable for large-caliber valves and low-gas sources as claimed in claim 1, wherein: the hydraulic oil pump is characterized in that a liquid inlet and outlet (2.3) of the gas-liquid tank (2) is communicated with the hydraulic oil cylinder (3) through a hydraulic oil channel, a hydraulic manual pump (7) is arranged on the hydraulic oil channel, and the hydraulic manual pump (7) comprises a gas-liquid/manual pump selection valve (7.1), a manual pump switch (7.2) and a manual pump (7.3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811519665.8A CN109340443B (en) | 2018-12-12 | 2018-12-12 | Miniaturized gas-liquid linkage actuator suitable for large-caliber valve and low-gas source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811519665.8A CN109340443B (en) | 2018-12-12 | 2018-12-12 | Miniaturized gas-liquid linkage actuator suitable for large-caliber valve and low-gas source |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109340443A CN109340443A (en) | 2019-02-15 |
| CN109340443B true CN109340443B (en) | 2023-11-10 |
Family
ID=65304057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811519665.8A Active CN109340443B (en) | 2018-12-12 | 2018-12-12 | Miniaturized gas-liquid linkage actuator suitable for large-caliber valve and low-gas source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109340443B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110411751B (en) * | 2019-07-09 | 2021-09-03 | 中航工程集成设备有限公司 | Thrust calibration system for engine test bed |
| CN110500435A (en) * | 2019-07-26 | 2019-11-26 | 江苏理工学院 | A kind of gas-liquid linked control system for the control of oil-gas pipeline valve |
| CN110985456B (en) * | 2019-12-31 | 2024-07-16 | 中核武汉核电运行技术股份有限公司 | Gas-liquid combined rotary motion structure |
| CN111648877B (en) * | 2020-05-22 | 2022-03-04 | 宁波天擎航天科技有限公司 | Control valve and storage tank system |
| CN114960568B (en) * | 2022-04-22 | 2023-12-05 | 中国电建集团华东勘测设计研究院有限公司 | Emergency drainage system for seepage water collecting well of large hydropower station |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018036496A1 (en) * | 2016-08-25 | 2018-03-01 | 成都迈可森流体控制设备有限公司 | Valve actuator based on gas-fluid composite spring |
| WO2018036497A1 (en) * | 2016-08-25 | 2018-03-01 | 成都迈可森流体控制设备有限公司 | Drive device and valve actuator based on gas-fluid composite spring |
| CN208123152U (en) * | 2018-05-04 | 2018-11-20 | 成都迈可森流体控制设备有限公司 | A kind of gas-liquid linkage actuator preventing oil spout |
-
2018
- 2018-12-12 CN CN201811519665.8A patent/CN109340443B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018036496A1 (en) * | 2016-08-25 | 2018-03-01 | 成都迈可森流体控制设备有限公司 | Valve actuator based on gas-fluid composite spring |
| WO2018036497A1 (en) * | 2016-08-25 | 2018-03-01 | 成都迈可森流体控制设备有限公司 | Drive device and valve actuator based on gas-fluid composite spring |
| CN208123152U (en) * | 2018-05-04 | 2018-11-20 | 成都迈可森流体控制设备有限公司 | A kind of gas-liquid linkage actuator preventing oil spout |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109340443A (en) | 2019-02-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109340443B (en) | Miniaturized gas-liquid linkage actuator suitable for large-caliber valve and low-gas source | |
| CN203926191U (en) | With the hydraulic system of two-way palingenesis | |
| CN205715015U (en) | A kind of hydraulic system possessing supertension fan-out capability | |
| CN105889159A (en) | Hydraulic system with ultra-high pressure outputting capacity | |
| CN105114502A (en) | Gas-liquid damping system | |
| CN202251171U (en) | Motion control device of cylinders in series | |
| CN106739122B (en) | The electrichydraulic control press of mechanical signal commutation | |
| CN103233932A (en) | High integration hydraulic driving unit structure | |
| CN104132023B (en) | Controlled variable cross-section hydraulic cylinder and hydraulic control system thereof and control method | |
| CN106763803B (en) | A kind of control valve for small flows | |
| CN107191423A (en) | A kind of hydraulic synchronization control loop | |
| CN202597861U (en) | Pile-up valve for hydraulic control of large-flow high-pressure ball valve | |
| CN108005993A (en) | A kind of electrohydraulic actuator for reciprocating compressor amount regulating system | |
| CN207609641U (en) | A kind of electrohydraulic actuator for reciprocating compressor amount regulating system | |
| US20140260948A1 (en) | Hydraulic actuator for a compressed air energy storage system | |
| CN216478086U (en) | Valve composite actuating mechanism | |
| CN209511247U (en) | A kind of miniaturization gas-liquid linkage actuator suitable for large bore valves, low gas source | |
| CN209524141U (en) | The gas-liquid linkage actuator of integrated superposing type gas-liquid two-phase medium synchronism output | |
| CN108180176A (en) | A kind of combined type follow-up hydraulic actuator | |
| CN202188203U (en) | Actuator for fluid control device with fluid flow control components | |
| CN102287418A (en) | Hydraulic cylinder control device capable of realizing accurate half-way stoppage | |
| RU2012120291A (en) | METHOD FOR PRESSURE TRANSFORMATION AND DEVICE FOR ITS IMPLEMENTATION | |
| JPH031602Y2 (en) | ||
| CN212509045U (en) | Flow-controllable hydraulic reversing valve | |
| CN202132290U (en) | Multistage stroke fluid power device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |