CN209494778U - A kind of pneumatic control hydraulic reversing valve - Google Patents
A kind of pneumatic control hydraulic reversing valve Download PDFInfo
- Publication number
- CN209494778U CN209494778U CN201920012873.2U CN201920012873U CN209494778U CN 209494778 U CN209494778 U CN 209494778U CN 201920012873 U CN201920012873 U CN 201920012873U CN 209494778 U CN209494778 U CN 209494778U
- Authority
- CN
- China
- Prior art keywords
- valve
- piston
- oil
- cylinder
- spring
- 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
Landscapes
- Safety Valves (AREA)
Abstract
The utility model discloses a kind of pneumatic control hydraulic reversing valves, relate generally to HYDRAULIC CONTROL SYSTEM technical field, including valve body (9), valve rod (7), cylinder (4), piston (6), piston (3), reset spring (15), spring base (13), spring housing (16), spacer sleeve (14), nonreturn valve core (20), relief valve assembly (19), manual decline valve rod (24) and porting, the composition such as oil inlet and outlet drop slowly.Valve opening, valve rod, cylinder inner cavity, piston of valve body etc. are circular configuration.Valve rod is located at middle position by the active force of reset spring (15), is in unloading condition.When the air pipe interface at piston both ends changes intake and exhaust, piston (6) can make the axial movement of different directions in cylinder, and the axial movement by travel limit can be made in the valve opening of valve body by piston push-and-pull valve rod, come change hydraulic medium confession, Hui Fangxiang, with realize lifting or decline etc. different job requirements.
Description
Technical field
The invention mainly relates to HYDRAULIC CONTROL SYSTEM technical field, specifically a kind of pneumatic control hydraulic reversing valve.
Background technique
Hydraulicdirectional control valve is divided by the number of vias that reversal valve is held: two-way, threeway, four-way and five are logical etc..Using spool
The absolute activity of wrong valve body makes oil circuit traffic, closes the direction that disconnected or transformation oil drops down, so that hydraulic fulfil element and its driving
The direction of motion is held, terminates or converted in mechanism.
The transhipment of a large amount of loose unpacked materials of present society such as sand, stone, stone, ore, coal, dregs, it is most of all excellent
It is completed selected from unloading, though dumper series various in style is different, and it is single to be substantially all made of Pneumatic and hydraulic lifting dumping device, into
The manual automatic unloading of row.Although various dumper hydraulic lifting dumping devices are different, various hydraulic lifting system working principles
It is roughly the same.A kind of pneumatic control hydraulic reversing valve is the main operating element in the system, there is that design is clumsy, and volume is big, property
It can be not good enough.In use, after container is lifted, occur phenomena such as system failure or card valve suddenly, lead to not work normally,
Container, which fails to lay down, to be come, and vehicle dare not travel, and scene can not then be repaired without lifting equipment.Although this failure occurrence probability is not high,
It causes after all helpless, great problem and inconvenience can be brought, while necessarily will cause certain economic loss.This phenomenon
It is also common defects existing for current similar products at home and abroad and deficiency.
Summary of the invention
In view of the deficiencies in the prior art and defect, the present invention provides a kind of pneumatic control hydraulic reversing valves, normal to lift
High pressure oil is without valve rod when rising, and direct-furnish oil cylinder, greatly reduces the failure rate of valve and extends service life, when fuel feeding loses
By the check valve close synchronously hydraulic system lifted when pressure, while safe pressure maintaining is carried out to by act system, can kept away
Exempt from accident caused by due to decompression, when encountering card valve phenomenon phenomenon, openable manual control caving valve preferably descends reduction of speed according to oneself
Degree normally puts down container, then closes this valve and resets, easily to solve live problem.
In order to solve the above-mentioned technical problem, the present invention adopts the following technical scheme: a kind of pneumatic control hydraulic reversing valve, including valve
Body, is equipped with cylinder in the side of the valve body, is equipped with spring housing in the other side of the valve body, is equipped with back on the valve body top
Hydraulic fluid port, lower part are equipped with oil inlet P, and the oil inlet P is connected in the intracorporal undercut groove a of valve, undercut groove b, undercut groove c, institute
State undercut groove b, undercut groove c is connect with oil return inlet T, be equipped with manual decline valve rod, the manual control lowering valve in the side of valve body
Bar is connect with oil duct, and the oil duct is connect by oil duct d with oil return inlet T, valve rod is equipped in the valve body, in the valve rod one
End is equipped with piston, and the piston is connect with cylinder, and slow drop piston is equipped in the cylinder, spring is equipped in the spring housing
Seat I, spacer sleeve, reset spring, spring base II are equipped with relief valve assembly in the valve body, oil inlet P side.
As a further improvement of the present invention, the cylinder is connect by soket head cap screw with cylinder back cover, in the gas
It is covered after cylinder equipped with slow sending down abnormally ascending mouth.
As a further improvement of the present invention, it is equipped on the cylinder and is respectively equipped with lifting port, decline port, it is described
Lifting port, decline port are located at piston two sides.
As a further improvement of the present invention, the spring base I setting is in spring housing's opening, the spring base II setting
On the inner wall of spring housing, spacer sleeve is equipped on the spring base I, the spring base I and spring base II pass through reset spring
Connection.
As a further improvement of the present invention, the relief valve assembly includes safety valve, nonreturn valve core, one-way valve spring,
The relief valve assembly is connect with oil connection.
As a further improvement of the present invention, it is equipped with and blocks inside the oil return opening.
As a further improvement of the present invention, the diameter of the slow drop piston is greater than the diameter of piston.
Compared with prior art, the device have the advantages that are as follows:
(1) invention is the work requirements that should be had according to dumper, and gathers the working principle of similar products at home and abroad,
Principle of maximizing favourable factors and minimizing unfavourable ones innovation, realizes compact-sized, small in size, light-weight, rationally distributed, aesthetic in appearance, reliable performance, uses
The advantages that service life is long, easy to maintenance.
(2) after container is lifted, such as occur phenomena such as card valve suddenly, lead to not lower in container, at this time vehicle
It dare not travel, because easily turning on one's side first is that superelevation, the two center of gravity is on the upper side, often scene can not then carry out scene again without lifting equipment
Maintenance, causes helpless, can bring and great problem and cause certain economic loss.Though above-mentioned phenomenon occurrence probability is not
Height, but be once bound to cause extremely difficult.This phenomenon be also common defects existing for current similar products at home and abroad with not
Foot.It can safety and steady decline, light solution scene embarrassment and problem using Manual descending mechanism of the invention.
(3) there is the more reasonable topology layout of tool compared with similar products, small in size, compact-sized, overall structure is good, outside
Type is beautiful, material effective rate of utilization is sufficiently improved while guaranteeing the mechanical strength at the position higher-pressure region Deng Ge, compared to similar
Valve weight has dropped 20% or so.And the installation space for installing the valve can be reduced.
(4) hydraulic oil is without any undercut groove in valve body in lifting process, also without valve rod, only pushes single
To spool through actuator port, lifting work is carried out by high-pressure oil pipe direct-furnish elevating ram.Fuel feeding resistance is thereby reduced, is avoided
Hydraulic oil changes pressure drop and frictional heat generation caused by flow direction because flowing through the groove of valve body valve rod, reduces hydraulic oil
Heating rate, improve mechanical efficiency.Reduce failure rate, extends service life.
(5) it can be made phenomena such as the pressure spring in relief valve assembly is broken suddenly, spool jam in lifting process
At entire hydraulic system fuel feeding decompression, the carload container lifted can fall rapidly, or even cause car crash.When
Before, most of automobile manufacture refitting factories are to avoid above-mentioned phenomenon, in a kind of oil pump feed to the oil of pneumatic control hydraulic reversing valve
Check valve has been added between road.A kind of pneumatic control hydraulic reversing valve of the invention is designed at actuator port equipped with nonreturn valve core, single
To check valve apparatus such as valve springs, safe pressure maintaining is carried out to by act system, to have prevented to cause after decompression hydraulic oil to flow back goods
Case falling phenomenon, the above-mentioned drawback of effective solution.Just do not have to commutate in oil pump feed to a kind of Pneumatic and hydraulic again since in this way
Check valve has individually been added between the oil circuit of valve.To also save installation work-hour, production efficiency is improved, and reduce liquid
Pressure system can leakage point.
Detailed description of the invention
The present invention is further illustrated with reference to the accompanying drawings and detailed description:
Fig. 1 is a kind of cross-sectional view of pneumatic control hydraulic reversing valve of the present invention；
Fig. 2 is a kind of position A-A cross-sectional view of pneumatic control hydraulic reversing valve of the present invention；
Fig. 3 is a kind of position E-E cross-sectional view of pneumatic control hydraulic reversing valve of the present invention；
Fig. 4 is a kind of packing case lifting structural schematic diagram of pneumatic control hydraulic reversing valve of the present invention；
Fig. 5 is a kind of cross-sectional view of the packing case lifting structure A-A of pneumatic control hydraulic reversing valve of the present invention；
Fig. 6 is a kind of cross-sectional view of the packing case lifting structure E-E of pneumatic control hydraulic reversing valve of the present invention；
Fig. 7 is a kind of container structure drop schematic diagram of pneumatic control hydraulic reversing valve of the present invention；
Fig. 8 is a kind of cross-sectional view of the container structure drop A-A of pneumatic control hydraulic reversing valve of the present invention；
Fig. 9 is a kind of cross-sectional view of the container structure drop E-E of pneumatic control hydraulic reversing valve of the present invention；
Figure 10 is a kind of packing case lifting operation principle schematic diagram of pneumatic control hydraulic reversing valve of the present invention；
Figure 11 is that structural schematic diagram drops in a kind of container of pneumatic control hydraulic reversing valve of the present invention slowly；
Figure 12 is the cross-sectional view that structure A-A drops in a kind of container of pneumatic control hydraulic reversing valve of the present invention slowly；
Figure 13 is the cross-sectional view that structure E-E drops in a kind of container of pneumatic control hydraulic reversing valve of the present invention slowly；
In figure: 1 slow sending down abnormally ascending mouth, 2 cylinder back covers, 3 slow drop pistons, 4 cylinders, 5 lifting ports, 6 pistons, 7 valve rods, 8 declines
Port, 9 valve bodies, 10 safety valves, 11 closure, 12 oil inlets, 13 spring base I, 14 spacer sleeves, 15 reset springs, 16 spring housing, 17
Spring base II, 18 soket head cap screws, 19 relief valve assemblies, 20 nonreturn valve cores, 21 one-way valve springs, 22 oil connections, 23 oil ducts,
24 manual decline valve rods, a undercut groove a, b undercut groove b, c undercut groove c, d oil duct d, e oil duct e, T oil return inlet T, T1 oil return inlet T 1,
P oil inlet P, A actuator port.
Specific embodiment
It is right in the following with reference to the drawings and specific embodiments in order to which technical solution of the present invention and beneficial effect are more clearly understood
The present invention is described in further detail, it should be understood that and the specific embodiments described herein are only used for understanding the present invention,
Be not intended to limit the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
Fig. 1 to Figure 13 just gives one embodiment of the present invention, and a kind of pneumatic control hydraulic reversing valve includes valve body 9,
The side of the valve body 9 is equipped with cylinder 4, is equipped with spring housing 16 in the other side of the valve body 9, is equipped on 9 top of valve body
Oil return opening 11, lower part are equipped with oil inlet P, and the oil inlet P is connected in undercut groove a, undercut groove b, undercut groove in valve body 9
C, the undercut groove b, undercut groove c are connect with oil return inlet T, are equipped with manual decline valve rod 24, the manual control in 9 side of valve body
Decline valve rod 24 is connect with oil duct 23, and the oil duct 23 is connect by oil duct d with oil return inlet T, and valve rod is equipped in the valve body 9
7, it is equipped with piston 6 in described 7 one end of valve rod, the piston 6 is connect with cylinder 4, slow drop piston 3 is equipped in the cylinder 4,
In the spring housing 16 be equipped with spring base I13, spacer sleeve 14, reset spring 15, spring base II17, the valve body 9, into
The side hydraulic fluid port P is equipped with relief valve assembly 19.
The cylinder 4 is connect by soket head cap screw 18 with cylinder back cover 2, and slow sending down abnormally ascending is equipped on the cylinder back cover 2
Mouth 1.
It is equipped on the cylinder 4 and is respectively equipped with lifting port 5, decline port 8, the lifting port 5, decline port 8
It is located at 6 two sides of piston.
The spring base I13 is arranged in 16 opening of spring housing, and the inner wall of spring housing 16 is arranged in the spring base II17
On, spacer sleeve 14 is equipped on the spring base I13, the spring base I13 and spring base II17 is connected by reset spring 15
It connects.
The relief valve assembly 19 includes safety valve 10, nonreturn valve core 20, one-way valve spring 21, the relief valve assembly 19
It is connect with oil connection.
It is equipped with inside the oil return opening 11 and blocks 11.
The diameter of slow drop piston (3) is greater than the diameter of piston 6.
Valve rod is located at middle position by the active force of reset spring (15), is in unloading condition.When the air pipe interface at piston both ends
When changing intake and exhaust, piston 6 can make the axial movement of different directions in cylinder, and can be in the valve of valve body by piston push-and-pull valve rod
Make the axial movement by travel limit in hole, to change confession, the Hui Fangxiang of hydraulic medium, to realize lifting or decline etc. no
Same job requirement.
1. off working state, middle position at valve rod, as shown in Figure 1, Figure 2, Fig. 3 when the valve off working state, the valve at this time
Valve rod 7 middle position of left and right stroke is under the elastic reaction of reset spring 15.When the hydraulic oil that high-pressure oil pump is confessed
Enter valve body 9 through the valve oil inlet P, is returned directly to fuel tank through oil return inlet T through undercut groove a undercut groove b.At this time at oil pump feed
Unloading condition is being recycled without pressure, is driving the engine power loss of oil pump little.Oil return inlet T and T1 are communicated, and effect is identical, for visitor
Family is selected.
2. packing case lifting, right end position at valve rod, as Figure 4-Figure 6, when lifting 5 air inlet of port, lower descending air control 8 is vented,
Compressed air enters 6 left end of piston, and valve rod 7 is pushed to move right 12 millimeters, and push the spring seat I13 presses reset spring 15
It is reduced to shown position, it is then closed at both ends obstructed to enter undercut groove a for hydraulic oil at this time, and only promotion nonreturn valve core 20 is through actuator port
Direct-furnish oil load lifting cylinder, elevating ram work, starts to lift by automobile container to be offloaded.Its working principle is as shown in Figure 6.It can
The operating pressure of lifting is limited by the adjustment of safety valve 19, and when product export, calibrated handy family can not adjust without authorization.
It will cause phenomena such as the pressure spring in relief valve assembly 19 is broken suddenly, spool jam in lifting process
Entire hydraulic system fuel feeding decompression, the automobile container lifted can fall rapidly, or even cause car crash, and the valve is in work
Make design at hydraulic fluid port A and carries out safe guarantor to by act system equipped with check valve assemblies such as nonreturn valve core 20, one-way valve springs 21
Pressure, to have prevented to cause after decompression hydraulic oil to flow back container falling phenomenon, the above-mentioned drawback of effective solution.Furthermore normal lifting
When any undercut groove and valve rod of the high pressure oil without valve body, and the direct-furnish elevating ram after check valve.
In lifting process, when lifting load overrate, relief valve assembly 19 is pushed by working media hydraulic oil
Safe spool, which opens the safety-valve, starts overflow.So that entire hoisting system is in overload protection state.
3. container Manual descending, the system is in use, after container is lifted, such as occurs phenomena such as card valve suddenly, leads
Cause can not work normally, and container drop is not got off, and can be enclosed the left-handed 1-2 of Manual descending valve rod 24 with spanner, will be in elevating ram
Hydraulic oil enters oil duct d to oil return inlet T through oil channel 23, and oil duct d, T is communicated, under realization Manual Emergency Control container safety and steady
Drop, the speed of decline are directly proportional in the open degree of Manual descending valve rod 24.Manual descending valve rod 24 is closed to reset after decline and is
It can.Easily to solve live problem.
4. container declines, left position at valve rod, as Figure 7-9,8 air inlet of sending down abnormally ascending mouth instantly, lifting port 5 is vented,
Compressed air enters 6 right end of piston, pushes valve rod 7 to be moved to the left, and pull spring base II17, so that reset spring 15 compresses
To shown position, oil pump institute arrives oil return inlet T oil return through undercut groove (b) into undercut groove a through oil inlet 12 for hydraulic oil at this time,
In oil return unloading state.Hydraulic oil pressure is returned to working hole A by the effect that the hydraulic oil in elevating ram is self-possessed by automobile container,
Nonreturn valve core 20 is in close state at this time, and hydraulic oil enters undercut groove through oil duct e and carries out oil return through undercut groove b to oil return inlet T
To fuel tank, realize that elevating ram decline, automobile container decline reset.
5. container drops slowly, center-left position drops state as figs 11-13 slowly at valve rod, i.e., slow 1 air inlet of sending down abnormally ascending mouth,
Decline 8 air inlet of port, lifting port 5 is vented.6 diameter of piston is 46 millimeters of Φ, and area is 16.62 square centimeters, and slow drop is lived
The diameter for filling in (3) is 48 millimeters of Φ, and area is 18.1 square centimeters, and the two difference in areas is 1.48 square centimeters, works as work gas
When pressure is 0.8Mpa, pneumatic thrust difference caused by the two is 11.84kg.Because the thrust of drop piston 3 is greater than piston 6 slowly,
So drop piston 3 moves right to cylinder reducing step dead point slowly, piston 6 is moved to the left with ovable valve stem 7, and pulls spring base
II17, so that reset spring 15 is compressed to shown position, oil pump institute enters undercut groove a through oil inlet 12 for hydraulic oil and passes through at this time
Undercut groove (b) arrives oil return inlet T oil return, is in oil return unloading state.The work that hydraulic oil in elevating ram is self-possessed by automobile container
Working hole A is returned to by hydraulic oil pressure, nonreturn valve core 20 is in close state at this time, and hydraulic oil enters undercut groove c through oil duct e and passes through
Narrow annular channel at k point between valve rod 7 and valve body 9 realizes quantitative oil return to fuel tank to undercut groove b to oil return inlet T.According to hydraulic
Law " speed depends on flow ", then have the size of above-mentioned narrow annular channel to be decided by the speed of decrease speed.It can be seen that it is preferred that
Reasonable slit sizes can realize that ideal constant speed drops slowly.
It will cause entire hydraulic system fuel feeding decompression when overflow valve spring is broken suddenly in lifting process, lifted
Automobile container can fall rapidly, or even cause car crash, this is the shared maximum drawback of current international and domestic product.This
Product design overcomes above-mentioned drawback completely, and high pressure oil is without valve rod when normal lifting, and direct-furnish oil cylinder, greatly reduces valve
Failure rate and extend service life.When fuel feeding decompression by the check valve close synchronously hydraulic system lifted,
Safe pressure maintaining has been carried out to by act system simultaneously, can avoid accident caused by due to decompression.
The system is in use, after container is lifted, occurs card valve phenomenon suddenly, leads to not work normally, container
It fails to lay down and, scene can not repair again, cause helpless, can bring greatly awkward and inconvenient, while necessarily will cause one
Fixed work-loss costs.This phenomenon is also common defects existing for current similar products at home and abroad and deficiency.This product design is worked as
Above-mentioned phenomenon is encountered, openable manual control caving valve normally puts down container according to oneself ideal decrease speed, then by this valve
It closes and resets.Easily to solve live problem.
It is worth noting that, in the description of the present invention, term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation,
It is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In addition, term " first ", " second ",
" third " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
Claims (7)
1. a kind of pneumatic control hydraulic reversing valve, it is characterised in that: including valve body (9), be equipped with cylinder in the side of the valve body (9)
(4), spring housing (16) are equipped in the other side of the valve body (9), are set on the valve body (9) top equipped with oil return opening 11, lower part
There is oil inlet P, the oil inlet P is connected in undercut groove a, undercut groove b, undercut groove c in valve body (9), the undercut groove
B, undercut groove c is connect with oil return inlet T, is equipped with manual decline valve rod (24), the manual decline valve rod in the valve body (9) side
(24) it is connect with oil duct (23), the oil duct (23) is connect by oil duct d with oil return inlet T, and valve rod is equipped in the valve body (9)
(7), piston (6) are equipped in the valve rod (7) one end, the piston (6) connect with cylinder (4), is equipped in the cylinder (4)
Slow drop piston (3), is equipped with spring base I (13), spacer sleeve (14), reset spring (15), spring base in the spring housing (16)
II (17) is equipped with relief valve assembly (19) in the valve body (9), oil inlet P side.
2. a kind of pneumatic control hydraulic reversing valve according to claim 1, it is characterised in that: the cylinder (4) passes through interior hexagonal
Screw (18) is connect with cylinder back cover (2), and slow sending down abnormally ascending mouth (1) is equipped on the cylinder back cover (2).
3. a kind of pneumatic control hydraulic reversing valve according to claim 1, it is characterised in that: be equipped with and divide on the cylinder (4)
Port (5), decline port (8) She You not be lifted, the lifting port (5), decline port (8) are located at piston (6) two sides.
4. a kind of pneumatic control hydraulic reversing valve according to claim 1, it is characterised in that: spring base I (13) setting exists
Spring housing (16) opening, the spring base II (17) is arranged on the inner wall of spring housing (16), on the spring base I (13)
Equipped with spacer sleeve (14), the spring base I (13) is connect with spring base II (17) by reset spring (15).
5. a kind of pneumatic control hydraulic reversing valve according to claim 1, it is characterised in that: the relief valve assembly (19) includes
Safety valve (10), nonreturn valve core (20), one-way valve spring (21), the relief valve assembly (19) connect with oil connection.
6. a kind of pneumatic control hydraulic reversing valve according to claim 1, it is characterised in that: be equipped with inside the oil return opening 11
It blocks (11).
7. a kind of pneumatic control hydraulic reversing valve according to claim 1, it is characterised in that: the diameter of slow drop piston (3)
Greater than the diameter of piston (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920012873.2U CN209494778U (en) | 2019-01-04 | 2019-01-04 | A kind of pneumatic control hydraulic reversing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920012873.2U CN209494778U (en) | 2019-01-04 | 2019-01-04 | A kind of pneumatic control hydraulic reversing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209494778U true CN209494778U (en) | 2019-10-15 |
Family
ID=68155189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920012873.2U Active CN209494778U (en) | 2019-01-04 | 2019-01-04 | A kind of pneumatic control hydraulic reversing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209494778U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109505817A (en) * | 2019-01-04 | 2019-03-22 | 潍坊山特液压机械有限公司 | A kind of pneumatic control hydraulic reversing valve |
-
2019
- 2019-01-04 CN CN201920012873.2U patent/CN209494778U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109505817A (en) * | 2019-01-04 | 2019-03-22 | 潍坊山特液压机械有限公司 | A kind of pneumatic control hydraulic reversing valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203176024U (en) | Shearing machine hydraulic control system | |
| CN106523323A (en) | Hydraulic main unit cylinder without piston rod for connection and hydraulic compressor | |
| CN209494778U (en) | A kind of pneumatic control hydraulic reversing valve | |
| CN201531483U (en) | Single-acting fast closing/double-acting boosting hydraulic cylinder | |
| CN208651309U (en) | Pneumatic control proportioning throttling hydraulicdirectional control valve | |
| CN102493380A (en) | Hydraulic system and multifunctional maintenance truck working device | |
| CN208281487U (en) | The speed change operating valve of the built-in neutral signal device of loading machine | |
| CN109505817A (en) | A kind of pneumatic control hydraulic reversing valve | |
| CN207026578U (en) | A kind of accumulation of energy return-stroke type hydraulic system of cutting machine | |
| CN102616700B (en) | Oil and air hybrid driven lifting control device | |
| CN201951447U (en) | Multi-axle automatic adjusting type emergency relay valve | |
| CN201301205Y (en) | Control loop for descending of fork of industrial vehicle | |
| CN102530780A (en) | Hydraulic pipeline system for forklift two-section full-free gantry | |
| CN206175365U (en) | Integral type multiway valve | |
| CN201786791U (en) | Three-position four-way pneumatically-controlled reversing valve | |
| CN2388387Y (en) | Three-purpose valve test table automatic intensifier | |
| CN201851419U (en) | Three-position three-way fast-slow-descending air control reversing limit valve | |
| CN214742411U (en) | Control valve group for laminating machine and photovoltaic laminating machine | |
| CN2779131Y (en) | Pneumatic controlled lifting valve of self-dumping car | |
| CN213744210U (en) | Vertical garbage compressor hydraulic system with liquid charging function | |
| CN211231068U (en) | Valve bank for controlling emergency descending of flat car | |
| CN204533054U (en) | For the hydraulic stroke locking mechanism of pneumatic actuator | |
| CN2517920Y (en) | Remote control valve | |
| CN202482015U (en) | Hydraulic pipeline system for two-section full-free gantry of forklift | |
| CN202597327U (en) | Rapid oil cylinder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |