CN105736506B - High-pressure cylinder group and pressurization system - Google Patents

High-pressure cylinder group and pressurization system Download PDF

Info

Publication number
CN105736506B
CN105736506B CN201511027165.9A CN201511027165A CN105736506B CN 105736506 B CN105736506 B CN 105736506B CN 201511027165 A CN201511027165 A CN 201511027165A CN 105736506 B CN105736506 B CN 105736506B
Authority
CN
China
Prior art keywords
cylinder group
chamber
pressure
hydraulic
cylinder
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
Application number
CN201511027165.9A
Other languages
Chinese (zh)
Other versions
CN105736506A (en
Inventor
林瑞坤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Index Automatic Technology Co ltd
Original Assignee
Index Automatic Technology Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Index Automatic Technology Co ltd filed Critical Index Automatic Technology Co ltd
Publication of CN105736506A publication Critical patent/CN105736506A/en
Application granted granted Critical
Publication of CN105736506B publication Critical patent/CN105736506B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08Characterised by the construction of the motor unit
    • F15B15/14Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423Component parts; Constructional details
    • F15B15/1428Cylinders
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08Characterised by the construction of the motor unit
    • F15B15/14Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423Component parts; Constructional details
    • F15B15/1447Pistons; Piston to piston rod assemblies

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)

Abstract

The invention relates to a high-pressure cylinder group, which comprises a cylinder body, a cylinder cover and a cylinder cover, wherein the cylinder body is provided with a pressure chamber and a pressurizing chamber; two pressurizing plug rods with one piston set inside the cylinder and several rod rods connected to the piston and communicated to the pressurizing chamber of the cylinder. A supercharging system comprises the high-pressure cylinder group; and/or a low pressure cylinder group, which is provided with a cylinder body having an oil pressure chamber, and a piston moving in the oil pressure chamber; and/or a cylinder group, which is provided with a cylinder body provided with a hydraulic chamber, and a piston is movable in the hydraulic chamber of the cylinder group; and an oil passage unit.

Description

High pressure cylinder group and pressure charging system
Technical field
The present invention is relevant with gas hydraulic technology, particularly relates to a kind of high pressure cylinder group, and a kind of pressure charging system.
Background technology
Known high pressure cylinder group and pressure charging system, such as No. 098124486 patent of TaiWan, China of applicant, its high pressure cylinder only has One group of actuator.Therefore, its responsiveness or supercharging power only have single selection, therefore are having other responsivenesses or pressurized energy During road demand, it is clear that can not be used cooperatively.Furthermore its oil path control system can not still meet that high-low pressure recycles various actions The demand of stroke.
It is thus known that the missing of high pressure cylinder group and pressure charging system still has much room for improvement.
The content of the invention
In view of the above-mentioned problems, it is a primary object of the present invention to provide a kind of high pressure cylinder for accelerating pressurized effect speed Group.
To reach above-mentioned purpose, a kind of high pressure cylinder group 1 provided by the present invention, it is characterised in that include:One cylinder body 10, With an air-pressure chamber 11, a pumping chamber 12;Two supercharging stopper rods 20, have the air-pressure chamber 11 that a piston 21 is located at the cylinder body 10, Multiple rod members 22 are connected to the piston 21 and pass to the pumping chamber 12 of the cylinder body 10.
The invention described above is provided in the technical scheme of high pressure cylinder group, and rod member 22 and another supercharging of a supercharging stopper rod 20 are filled in The rod member 22 of bar 20 is distributed in distance.
The air-pressure chamber 11 of the cylinder body 10 has multiple, is each used for each supercharging stopper rod 20 respectively.
The air-pressure chamber 11 of the cylinder body 10 has multiple, is each used for each supercharging stopper rod 20 respectively.
Each air-pressure chamber 11 of the high pressure cylinder group 1 connects a controlling switch 30 with a gas circuit unit 3.
The rod member 22 of one supercharging stopper rod 20 intersects section A with the rod member 22 of another supercharging stopper rod 20 for axial direction.
The rod member 22 of one supercharging stopper rod 20 intersects section A with the rod member 22 of another supercharging stopper rod 20 for axial direction.
High pressure cylinder group of the present invention, acted simultaneously using two supercharging stopper rods, so as to reach the effect of Quick-pressurizing.
The main object of the present invention, which also resides in, provides a kind of pressure charging system, and it can provide bigger pressurized effect, and/or add Its fast speed of action.
To reach above-mentioned purpose, a kind of pressure charging system 2 provided by the present invention, it is characterised in that include:Just like right It is required that the high pressure cylinder group 1 described in 1;One low pressure (LP) cylinder group 4, has a cylinder body 40, and the cylinder body 40 has a hydraulic chamber 42, a piston 50 are movably set in the hydraulic chamber 42;One cylinder group 6, has a cylinder body 60, and the cylinder body 60 has a hydraulic pressure chamber 61, and one Piston 70 is movably set in the hydraulic pressure chamber 61 of the cylinder group 6;One oil circuit unit 8, fluid is can control by the cylinder group 6 Hydraulic pressure chamber 61 flow to the hydraulic chamber 42 of the low pressure (LP) cylinder group 4, the cylinder is flow to by the pumping chamber 12 of the high pressure cylinder group 1 6 hydraulic pressure chamber 61 is organized, and the pumping chamber 12 of the high pressure cylinder group 1 is flow to by the hydraulic chamber 42 of the low pressure (LP) cylinder group 4.
To reach above-mentioned purpose, the present invention also provides another pressure charging system 2, it is characterised in that includes:Just like right It is required that the high pressure cylinder group 1 described in 1;One low pressure (LP) cylinder group 4, has a cylinder body 40, and the cylinder body 40 has a hydraulic chamber 42, a piston 50 are movably set in the hydraulic chamber 42;One cylinder group 6, has a cylinder body 60, and the cylinder body 60 has a hydraulic pressure chamber 61, and one Piston 70 is movably set in the hydraulic pressure chamber 61 of the cylinder group 6;One oil circuit unit 8, there is a pressure regulator valve 81 to be located at described low Pipeline between the hydraulic chamber 42 of cylinder pressure group 4 and the hydraulic pressure chamber 61 of cylinder group 6, a circulation controlling switch 82 are located at described in connection The pipeline of pumping chamber 12, one first check valve 83 are located at the flow quantity control switch 82 and the hydraulic pressure chamber 61 of the cylinder group 6 Between pipeline, and one second check valve 84 is located at flow quantity control switch 82 and the hydraulic chamber 42 of the low pressure (LP) cylinder group 4 Between pipeline.
The pressure charging system of the present invention, coordinate oil circuit unit that high pressure cylinder group can be made to play its certain action effect.
Brief description of the drawings
Fig. 1 is the structural representation of the preferred embodiment of high pressure cylinder group one of the present invention;
Fig. 2 is along 2-2 secant directional profile views in Fig. 1;
Fig. 3 is the structural representation of the preferred embodiment of pressure charging system one of the present invention;
Fig. 4 is generally same as Fig. 3, shows its another operating state;
Fig. 5 is generally same as Fig. 3, shows its another operating state;
Fig. 6 is the structural representation of another preferred embodiment of pressure charging system of the present invention;
Fig. 7 is the structural representation of the another preferred embodiment of pressure charging system of the present invention.
Embodiment
The technology contents and feature of the present invention by cited embodiment and with reference to accompanying drawing, will be described in detail below, its In:
As shown in Figures 1 and 2, the high pressure cylinder group 1 of a preferred embodiment of the present invention, includes:
One cylinder body 10, there is two air-pressure chambers 11, a pumping chamber 12.
Two supercharging stopper rods 20, have a piston 21, and piston 21 is located at the air-pressure chamber 11 of cylinder body 10, and multiple rod members 22 are connected to Piston 21 and pass to the pumping chamber 12 of cylinder body 10.
Wherein, the circumferentially ring-like spacer arrangement of rod member 22 of the rod member 22 of a supercharging stopper rod 20 and another supercharging stopper rod 20, The rod member 22 of at least one supercharging stopper rod 20 axially mutually intersects with the rod member 22 of another supercharging stopper rod 20, the first supercharging stopper rod 20 Free air space is left between the rod member 422 of the start group 42 of rod member 22 and second.
That is, the air-pressure chamber 11 of cylinder body 10 can have it is multiple, respectively for it is each supercharging stopper rod 20 be used alone;In addition, high pressure cylinder group 1 Each air-pressure chamber 11 controlling switch 30 is connected with a gas circuit unit 3, the pumping chamber 12 of cylinder body 10 connects an oil circuit unit 8.
Thus, a pumping chamber 12 is worked together to using multiple supercharging stopper rods 20 of high pressure cylinder group 1, you can realize and provide more Accelerate the pressurized effect of its speed of action.
As shown in Figures 3 to 5, it is the pressure charging system 2 of a preferred embodiment of the present invention, includes:
One high pressure cylinder group 1, as previously described.
One low pressure (LP) cylinder group 4, there is a cylinder body 40 to have an air-pressure chamber 41, a hydraulic chamber 42;One piston 50 has a pneumaticpiston Portion 51 is active in the air-pressure chamber 41, and a hydraulic piston portion 52 is active in the hydraulic chamber 42.
One cylinder group 6, there is a cylinder body 60 to have a hydraulic pressure chamber 61, a piston 70 is movably set in the liquid of cylinder group 6 Pressure chamber 61.
One oil circuit unit 8, has a pressure regulator valve 81, and pressure regulator valve 81 is located at hydraulic chamber 42 and the cylinder group 6 of low pressure (LP) cylinder group 4 Hydraulic pressure chamber 61 between pipeline, a circulation controlling switch 82 is located at the pipeline of connection pumping chamber 12, and one first check valve 83 sets Pipeline between flow quantity control switch 82 and the hydraulic pressure chamber 61 of cylinder group 6, and one second check valve 84 are located at circulation control Pipeline between system switch 82 and the hydraulic chamber 42 of low pressure (LP) cylinder group 4.
In other words, oil circuit unit 8, there is hydraulic chamber 42 and the liquid of cylinder group 6 of a pressure regulator valve 81 connection low pressure (LP) cylinder group 4 Pressure chamber 61, one first check valve 83 are communicated in the hydraulic pressure chamber 61 of cylinder group 6, and one second check valve 84 is communicated in circulation control System switch 82 and the hydraulic chamber 42 of low pressure (LP) cylinder group 4.And one circulation controlling switch 82 one end be communicated in the pumping chamber of high pressure cylinder group 1 12, the other end is communicated in the pipeline between the first check valve 83 and the second check valve 84.
The occupation mode of the present embodiment, is hereby described as follows:
As shown in figure 3, being respectively pressurized stopper rod 20 and pushing ahead makes its rod member 22 promote fluid, flow quantity control switch 82 is flowed through, By the block of the second check valve 84 but flow through the first check valve 83 and lead to the hydraulic pressure chamber 61 of cylinder group 6.
As shown in figure 4, the piston 70 of cylinder group 6 declines the oil for promoting fluid to flow to low pressure (LP) cylinder group 4 via pressure regulator valve 81 Pressure chamber 42, and promote piston 50 to be moved rearwards.Then, closing pressure-regulating valve 81 can control stopping is circulated, you can control piston 70 It is parked in precalculated position.
As shown in figure 5, the air inlet of air-pressure chamber 41 of low pressure (LP) cylinder group 4 promotes piston 50, hydraulic piston portion 52 promotes fluid to flow through Second check valve 84 and flow quantity control switch 82 and flow to the pumping chamber 12 of cylinder body 10, promote two supercharging stopper rods 20 to step back displacement.
Thus, the oil that oil circuit unit 8 can control fluid to flow to low pressure (LP) cylinder group 4 by the hydraulic pressure chamber 61 of cylinder group 6 can be achieved Pressure chamber 42, the hydraulic pressure chamber 61 of cylinder group 6, and the hydraulic chamber 42 by low pressure (LP) cylinder group 4 are flow to by the pumping chamber 12 of high pressure cylinder group 1 It flow to the pumping chamber 12 of high pressure cylinder group 1.
The blower operations of high pressure cylinder group 1, fast reinforcement can be not only used as, also can be as the work that fast cache is provided when declining With.
But oil circuit unit 8 of the present invention is not limited using only above-mentioned configuration mode, and it can make other configurations, do not limit yet and only make Foregoing sequence of movement.
As shown in fig. 6, for the pressure charging system 2 of another preferred embodiment of the present invention, include:
One high pressure cylinder group 1, as previously described.
One low pressure (LP) cylinder group 4, there is a cylinder body 40 to have an air-pressure chamber 41, a hydraulic chamber 42;One piston 50 has a pneumaticpiston Portion 51 is movably set in air-pressure chamber 41, and a hydraulic piston portion 52 is movably set in hydraulic chamber 42.
One oil circuit unit 8, there is one second check valve 84 to be communicated in flow quantity control switch 82 and the hydraulic chamber of low pressure (LP) cylinder group 4 42.And a circulation controlling switch 82, flow quantity control switch 82 one end and be communicated in the pumping chamber 12 of high pressure cylinder group 1, the other end connects Pass through the pipeline between the first check valve 83 and the second check valve 84.
As shown in fig. 7, for the pressure charging system 2 of another preferred embodiment of the invention, include:
One high pressure cylinder group 1, as previously described.
One cylinder group 6, there is a cylinder body 60 to have a hydraulic pressure chamber 61, a piston 70 is movably set in the liquid of cylinder group 6 Pressure chamber 61.
One oil circuit unit 8, has one first check valve 83, and the first check valve 83 is communicated in the hydraulic pressure chamber 61 of cylinder group 6; And a circulation controlling switch 82, flow quantity control switch 82 one end and be communicated in the pumping chamber 12 of high pressure cylinder group 1, the other end is communicated in Pipeline between first check valve 83 and the second check valve 84.
In addition to foregoing embodiment, the present invention also arbitrarily can arrange in pairs or groups or replace the following various forms of implementation:
For example, cylinder body 10, there are two air-pressure chambers 11 to be connected, or two air-pressure chambers 11 are same air-pressure chamber 11.
Or such as, each air-pressure chamber 11 of high pressure cylinder group 1 can also share same gas circuit unit 3 and same controlling switch 30.
Above-described any embodiment one or more can mutually arrange in pairs or groups and use, and can reach the mesh of the present invention 's.
Synthesis is foregoing, and it can provide bigger pressurized effect for high pressure cylinder group 1 and pressure charging system 2 of the present invention, and/or accelerate it Speed of action, therefore reach the purpose of the present invention really.

Claims (9)

1. a kind of high pressure cylinder group (1), it is characterised in that include:
One cylinder body (10), there are an air-pressure chamber (11), a pumping chamber (12);
Two supercharging stopper rods (20), the air-pressure chamber (11) of the cylinder body (10), multiple rod members (22) are respectively located at a piston (21) It is connected to the piston (21) and passes to the pumping chamber (12) of the cylinder body (10), wherein the rod member (22) of a supercharging stopper rod (20) It is distributed in distance with the rod member (22) of another supercharging stopper rod (20).
2. high pressure cylinder group (1) as claimed in claim 1, it is characterised in that:The air-pressure chamber (11) of the cylinder body (10) have it is multiple, Each used for each supercharging stopper rod (20) respectively.
3. high pressure cylinder group (1) as claimed in claim 1, it is characterised in that:The air-pressure chamber (11) of the cylinder body (10) have it is multiple, Each used for each supercharging stopper rod (20) respectively.
4. the high pressure cylinder group (1) as described in claim 1 or 2 or 3, it is characterised in that:Each air-pressure chamber of the high pressure cylinder group (1) (11) controlling switch (30) is connected with a gas circuit unit (3).
5. high pressure cylinder group (1) as claimed in claim 4, it is characterised in that:One supercharging stopper rod (20) rod member (22) with it is another The rod member (22) for being pressurized stopper rod (20) is axially intersection section (A).
6. the high pressure cylinder group (1) as described in claim 1 or 2 or 3, it is characterised in that:The rod member (22) of one supercharging stopper rod (20) With the rod member (22) of another supercharging stopper rod (20) section (A) is intersected for axial direction.
7. a kind of pressure charging system (2), it is characterised in that include:
One high pressure cylinder group (1) as claimed in claim 1;
One low pressure (LP) cylinder group (4), has a cylinder body (40), and the cylinder body (40) has a hydraulic chamber (42), a piston (50) activity It is arranged at the hydraulic chamber (42);
One cylinder group (6), has a cylinder body (60), and the cylinder body (60) has a hydraulic pressure chamber (61), a piston (70) activity It is arranged at the hydraulic pressure chamber (61) of the cylinder group (6);
One oil circuit unit (8), controllable fluid flow to the low pressure (LP) cylinder group (4) by the hydraulic pressure chamber (61) of the cylinder group (6) Hydraulic chamber (42), the hydraulic pressure chamber (61) of the cylinder group (6) is flow to by the pumping chamber (12) of the high pressure cylinder group (1), with And the pumping chamber (12) of the high pressure cylinder group (1) is flow to by the hydraulic chamber (42) of the low pressure (LP) cylinder group (4).
8. pressure charging system (2) as claimed in claim 7, it is characterised in that:The oil circuit unit (8) has a pressure regulator valve (81) The pipeline being located between the hydraulic chamber (42) of the low pressure (LP) cylinder group (4) and the hydraulic pressure chamber (61) of cylinder group (6), a flow quantity control Switch (82) is located at the pipeline for connecting the pumping chamber (12), and one first check valve (83) is located at the flow quantity control switch (82) Pipeline between the hydraulic pressure chamber (61) of the cylinder group (6), and one second check valve (84) are located at the flow quantity control Switch the pipeline between (82) and the hydraulic chamber (42) of the low pressure (LP) cylinder group (4).
9. a kind of pressure charging system (2), it is characterised in that include:
One high pressure cylinder group (1) as claimed in claim 1;
One low pressure (LP) cylinder group (4), has a cylinder body (40), and the cylinder body (40) has a hydraulic chamber (42), a piston (50) activity It is arranged at the hydraulic chamber (42);
One cylinder group (6), has a cylinder body (60), and the cylinder body (60) has a hydraulic pressure chamber (61), a piston (70) activity It is arranged at the hydraulic pressure chamber (61) of the cylinder group (6);
One oil circuit unit (8), there is hydraulic chamber (42) and cylinder group that a pressure regulator valve (81) is located at the low pressure (LP) cylinder group (4) (6) the pipeline between hydraulic pressure chamber (61), a circulation controlling switch (82) are located at the pipeline for connecting the pumping chamber (12), and one the One check valve (83) is located at the pipeline between the flow quantity control switch (82) and the hydraulic pressure chamber (61) of the cylinder group (6), And one second check valve (84) be located between flow quantity control switch (82) and the hydraulic chamber (42) of the low pressure (LP) cylinder group (4) Pipeline.
CN201511027165.9A 2014-12-31 2015-12-31 High-pressure cylinder group and pressurization system Active CN105736506B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TW103146666 2014-12-31
TW103146666A TWI595159B (en) 2014-12-31 2014-12-31 High-pressure cylinder and booster system

Publications (2)

Publication Number Publication Date
CN105736506A CN105736506A (en) 2016-07-06
CN105736506B true CN105736506B (en) 2018-01-26

Family

ID=56296106

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201511027165.9A Active CN105736506B (en) 2014-12-31 2015-12-31 High-pressure cylinder group and pressurization system

Country Status (2)

Country Link
CN (1) CN105736506B (en)
TW (1) TWI595159B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112567140B (en) * 2018-08-15 2023-01-24 Smc 株式会社 Supercharging device
TWI751380B (en) * 2018-09-25 2022-01-01 祥偉自動科技股份有限公司 Hydraulic buffer positioning and topping system
CN112009096B (en) * 2020-09-07 2021-07-27 乐清市东瓯印业有限公司 Double-cylinder ink adding device for printing machine

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU844833A1 (en) * 1979-10-23 1981-07-07 Предприятие П/Я М-5836 Pressure multiplicator
GB2162591B (en) * 1984-08-02 1988-05-25 Shoketsu Kinzoku Kogyo Kk Fluid pressure booster
CN2685624Y (en) * 2004-03-05 2005-03-16 西南石油学院 Ring Multi-rod hydraulic cylinder
TWM370017U (en) * 2009-04-22 2009-12-01 Koung Chin Co Ltd Full-stroke adjustable boost cylinder structure
TW201103743A (en) * 2009-07-20 2011-02-01 Index Automatic Technology Co Ltd High-low pressure buffering system
CN101987334B (en) * 2009-07-31 2012-07-18 祥伟自动科技股份有限公司 High-low pressure buffer system
CN203796658U (en) * 2014-03-26 2014-08-27 深圳市策维科技有限公司 Multi-shaft combined cylinder

Also Published As

Publication number Publication date
TWI595159B (en) 2017-08-11
TW201623809A (en) 2016-07-01
CN105736506A (en) 2016-07-06

Similar Documents

Publication Publication Date Title
CN105736506B (en) High-pressure cylinder group and pressurization system
CN103883338B (en) A kind of hydraulic support column self-boosting system containing hydraulic intensifier
CN205715015U (en) A kind of hydraulic system possessing supertension fan-out capability
CN106103145B (en) Active damper system for vehicle
CN102226453A (en) Dual-redundancy electro hydraulic servo actuator
CN105443477A (en) Hydraulic drive with rapid stroke and load stroke
CN105782147A (en) Double-acting hydraulic control system of supercharging device
CN203769811U (en) Self-help supercharging system with hydraulic supercharger and upright columns for hydraulic support
CN104196785B (en) A kind of closed type energy-saving type shield propulsion hydraulic system using multiplex pump to drive
CN103256273A (en) Automatic linear reciprocating type air cylinder
CN104988963A (en) Hydraulic excavator movable arm potential energy recovery system
CN204628680U (en) Automobile tailboard constant load pressure-compensated valve
CN202301245U (en) Multi-air-cylinder synchronous operation device
CN105757016A (en) Hydraulic control system of supercharging device
CN104776002A (en) Integrated type ultrahigh-pressure booster pump
CN104828702A (en) Crane, reversing control system, and oil supply apparatus thereof
CN205639153U (en) Supercharging device , hydraulic system and mechanical equipment
CN205533472U (en) Super high -pressure system of hydroforming hydraulic press
CN104061198A (en) Double-pump oil supply fast-control system
CN204553202U (en) Integrated column plug suction booster
CN202418066U (en) Hydraulic system and concrete equipment
CN203770245U (en) Integrated hydraulic valve set, hydraulic drive system and concrete pump
CN104153786A (en) Energy-saving tunnel shield thrust hydraulic system with coaxial motors
CN101328874B (en) Hydraulic slurry pump
CN103912534B (en) There is the constant difference overflow valve of unloading function

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant