CN206694343U - A kind of forklift multi-way valve with preferential steering, Dual-pump flow-converging and OPS functions - Google Patents
A kind of forklift multi-way valve with preferential steering, Dual-pump flow-converging and OPS functions Download PDFInfo
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- CN206694343U CN206694343U CN201720515526.2U CN201720515526U CN206694343U CN 206694343 U CN206694343 U CN 206694343U CN 201720515526 U CN201720515526 U CN 201720515526U CN 206694343 U CN206694343 U CN 206694343U
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Abstract
Turned to the utility model discloses one kind with preferential, the forklift multi-way valve of Dual-pump flow-converging and OPS functions, including oil-feed valve block, collaborate raising valve block, at least one Reversing valve plate, and oil return valve block, the oil-feed valve block is provided with the first oil inlet and the oil-feed oil duct for providing hydraulic oil to follow-up valve block, the interflow raising valve block is provided with the second oil inlet, the oil duct in parallel for being used to provide hydraulic oil to follow-up valve block connected with middle position oil duct is provided with the interflow raising valve block, only one safety valve is set between the oil-feed oil duct and back oil road, the interflow raising valve block is three eight logical reversal valves, second oil inlet connects when described three eight logical reversal valves are located at middle position with back oil road, collaborate when it plays raise-position to the middle position oil duct.Compared with conventional forklift banked direction control valves, the valve, which avoids working caused by two safety valves, interference noise problem and more to be saved.
Description
Technical field
It the utility model is related to a kind of with the preferential forklift multi-way valve turned to Dual-pump flow-converging and OPS functions.
Background technology
Hydraulic multitandem valve can be used in the equipment such as fork truck, loading machine and excavator.Conventional forklift banked direction control valves is monostable point
Manifold formula, i.e. banked direction control valves double pump fuel feeding, P1 mouths coming oil supply steering gear with constant flow rate by monostable flow divider valve core, no matter turned to
Whether device works, and all supplies steering gear with constant 25L/min flow, and steering gear wastes completely not working flow；P2 mouths come
Oil directly interflow to banked direction control valves work system, no matter descending valve plate, inclination valve block and accessory valve block, all can be double pump big flow
Work system is supplied, each executing agency is reached and completes corresponding actions.
In order to meet the requirement of fork truck lifting speed, conventional forklift banked direction control valves is worked simultaneously using double pump, and (double pump closes
Stream), but accessory oil cylinder to dump ram and below is all the work of double pump fuel feeding, due to dump ram and accessory oil cylinder direct
Footpath is small, and required flow is few, and the flow of double pump fuel feeding is significantly beyond required flow, so system pressure can be increased to safety valve
Control pressure so that safety valve opens off-load, so as to which system can be brought rapidly up, has not only wasted energy but also has damaged hydraulic system.
Chinese patent literature CN204003711U discloses a kind of fork truck interflow raising valve block, as depicted in figs. 1 and 2, bag
Include oil-feed valve block a (with the first oil inlet P 1, turning to mouth CF and LS mouth), interflow raising valve block b (carries A1 mouths and the second oil-feed
Mouthful P2), tilt valve block c (with A2 mouths and B2 mouths), (one carries A3 mouths and B3 mouths to two accessory valve block d, and another carries A4 mouths
With B4 mouths), oil return valve block e (carrying oil return inlet T 1), wherein, the second oil inlet P 2 is not when working successively by follow-up each
Valve block b, c, d and e middle position oil duct are to oil return inlet T 1, and pressure drag is larger, and the pressure loss is higher.In addition, in the fuel-displaced of oil-feed valve block
The first safety valve 1 ' and the second safety valve 2 ' are set on mouthful, first safety valve 1 ' and the second safety valve 2 ' setting identical are specified
Pressure, interfered both in release, there is larger noise.
Therefore, it is necessary to above-mentioned fork truck interflow raising valve block is improved, to reduce the pressure loss of forklift multi-way valve
And noise.
Utility model content
The purpose of this utility model is to provide a kind of fork truck multichannel for carrying and preferentially turning to Dual-pump flow-converging and OPS functions
Valve, to reduce the pressure loss and noise.
Therefore, the utility model provides a kind of forklift multi-way valve, including oil-feed valve block, interflow raising valve block, at least one
Individual Reversing valve plate and oil return valve block, the oil-feed valve block are provided with the first oil inlet and for providing hydraulic pressure to follow-up valve block
The oil-feed oil duct of oil, the interflow raising valve block are provided with the second oil inlet, are provided with the interflow raising valve block and middle position oil
The oil duct in parallel for being used to provide hydraulic oil to follow-up valve block of road connection, the oil duct in parallel and/or the oil-feed oil duct are with returning
Only one safety valve is set between oil duct, and the interflow raising valve block is three eight logical reversal valves, and described three eight lead to commutation
Valve forms the first connection valve pool in middle position and second oil inlet is connected by the first connection valve pool with back oil road, described
Three eight logical reversal valves form the second connection valve pool when playing raise-position and second oil inlet is closed by the second connection valve pool
It flow to the middle position oil duct.
Further, above-mentioned oil-feed valve block turns to oil-feed valve block to be preferential.
Further, above-mentioned interflow raising valve block is provided with the magnetic valve for being used for controlling oil return break-make, the magnetic valve
Break-make is on the scene associated with operator.
Further, above-mentioned oil return valve block is provided with the magnetic valve for being used for controlling hoist cylinder break-make, the magnetic valve
Break-make is on the scene associated with operator.
Further, the oil circuit that the control oil duct of the lifting hydraulic fluid port of above-mentioned interflow raising valve block connects with back oil road is provided with
Manual relief valve, the Manual relief valve are in parallel with the magnetic valve.
Further, above-mentioned first oil inlet and the second oil inlet are located at the top surface of valve block and are adjacently positioned.
Further, above-mentioned at least one Reversing valve plate includes tilting self-locking valve block.
Further, the control oil circuit of the steering mouth of above-mentioned oil-feed valve block is provided with check valve.
This forklift multi-way valve valve is applied to the fork truck system of large-tonnage double pump oil-feed work, and the outstanding feature of this valve is peace
Entirely, save.Compared with conventional forklift banked direction control valves, the valve has OPS (Operator Presence System, operator are on the scene)
Function, priority function, raising Dual-pump flow-converging function are turned to, the interflow raising valve block devises the parallel oil connected with middle position oil duct
Road, a safety valve is only designed between the oil-feed oil duct or oil duct in parallel and back oil road of the oil-feed valve block, avoids two safety
System interference noise problem caused by valve, in addition the second oil inlet coming oil collaborate raising valve block do not work when direct oil return box,
Energy dissipation is reduced, and is more saved.
In addition to objects, features and advantages described above, the utility model also has other purposes, feature and excellent
Point.Below with reference to figure, the utility model is described in further detail.
Brief description of the drawings
The Figure of description for forming the part of the application is used for providing further understanding to of the present utility model, this practicality
New schematic description and description is used to explain the utility model, does not form to improper restriction of the present utility model.
In the accompanying drawings：
Fig. 1 is the overall schematic of the forklift multi-way valve of prior art；
Fig. 2 is the hydraulic schematic diagram of the forklift multi-way valve of prior art；
Fig. 3 is the overall schematic according to forklift multi-way valve of the present utility model；And
Fig. 4 is the hydraulic schematic diagram according to forklift multi-way valve of the present utility model.
Description of reference numerals
10th, oil-feed valve block；20th, raising valve block is collaborated；
30th, self-locking valve block is tilted；40th, oil return valve block；
P1, the first oil inlet；CF, turn to mouth；
P2, the second oil inlet；A1, raising mouth；
A2, work oil inlet；B2, work oil return opening；
T1, oil return opening one；T2, oil return two；
11st, oil-feed oil duct；12nd, check valve；
21st, middle position oil duct；41st, back oil road；
22nd, the first connection valve pool；23rd, the second connection valve pool；
24th, oil duct in parallel；25th, safety valve；
26th, magnetic valve；27th, Manual relief valve；
42nd, magnetic valve.
Embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually combination.Describe the utility model in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
As shown in Figure 3 and Figure 4, forklift multi-way valve includes oil-feed valve block 10, interflow raising valve block 20, tilts self-locking valve block
30 and oil return valve block 40, the oil-feed valve block 10 is provided with the first oil inlet P 1 and for providing hydraulic oil to follow-up valve block
Oil-feed oil duct 11, the interflow raising valve block 20 is provided with the second oil inlet P 2, in the interflow raising valve block 20 provided with
What middle position oil duct 21 connected is used for the oil duct in parallel 24 to follow-up valve block offer hydraulic oil, the oil-feed oil duct 11 and back oil road 41
Between only one safety valve 25 is set, the interflow raising valve block 20 is three eight logical reversal valves, described three eight logical commutations
Valve forms the first connection valve pool 22 in middle position and second oil inlet P 2 passes through the first connection valve pool 22 and back oil road 41
Connection, described three eight logical reversal valves form the second connection valve pool 23 when playing raise-position and second oil inlet P 2 is by the
Two connection valve pools collaborate to the middle position oil duct 21.
The fuel feeding of oil inlet P 1 from one hydraulic pump of forklift hydraulic system to oil-feed valve block, by pressure-gradient control valve, in steering gear
When not turning to, P1 mouth coming oils are pushed priority spool open and all worked to work system, and when needing to turn to, steering gear work, preferential to protect
Steering flow needed for steering gear steering is demonstrate,proved, the fluid of remainder works to work system.
Collaborate oil inlet P 2 in forklift door frame not raising, pass through oil return opening whole low pressure oil return box；When forklift door frame needs
When wanting raising, lifting valve rod door frame raising is pulled out, coming oil and the back oil road of p2 mouths are closed so that the coming oil of P2 mouths also establishes pressure
Converge with P1 mouths coming oil in middle position oil duct, worked jointly to hoist cylinder, reach the purpose at interflow.If not operating lifting valve rod,
Individually operated inclination valve rod and accessory valve rod, the direct oil return of P2 mouth coming oils, are not involved in work.Due to large-tonnage fork truck dump ram
And accessory oil cylinder cylinder diameter below it is small, it is necessary to flow it is small, so oil cylinder to dump ram and below only needs single pump work
Just fully meet requirement.
In one embodiment, only one safety valve 25 is set between oil duct 24 and back oil road 41 in parallel, with described in replacement
Only one safety valve is set between oil-feed oil duct and back oil road.Now, safety valve may be provided at except oil-feed valve block other
On valve block.
In one embodiment, the forklift multi-way valve also includes the Reversing valve plate of other purposes such as accessory valve block, to be combined into
Required function and purposes.
In one embodiment, oil-feed valve block 10 turns to oil-feed valve block to be preferential, forklift multi-way valve at work, such as Fig. 4 institutes
Show, hydraulic oil enters in valve from P1 mouths, preferential to steering mouth CF mouths；When steering gear does not work, the LS mouths on valve are directly from steering
Oil return inside device so that non-spring side produces pressure difference with spring side, priority spool is pushed open, system coming oil to work system；Turn
When being turned to device, LS mouths are closed by the operating of steering gear, connect the load of LS mouths and steering gear, LS mouths obtain steering gear
Feedback pressure, so as to ensure that system coming oil preferentially ensures to turn to required flow.
In one embodiment, oil return valve block, which is provided with, is used to control oil return break-make to realize the magnetic valve 42 of OPS functions.Should
Forklift multi-way valve carries OPS functions, i.e., the normally open solenoid valve that someone is sitting in when on forklift seat on oil return valve block must be electrically turn off,
Whole hydraulic system can just set up operating pressure, and system can just work.It is used to control in addition, interflow raising valve block 20 is provided with
Oil return break-make is to realize the magnetic valve 26 of OPS functions.When someone is sitting on seat, it can be just forklift door frame to promote lifting valve rod
Decline by deadweight.
In one embodiment, the oil inlet P 2 of the first oil inlet P 1 and second is adjacently positioned.Topological simplicity valve block
Oil duct design so that hydraulic unit layout more rationally it is compact.
In one embodiment, the oil circuit that the second oil inlet P 2 connects with back oil road 41 is provided with Manual relief valve 27.Pass through
Increase Manual relief valve 27, effect and effect are as follows：When the electromagnetism defective valve or damage for controlling forklift door frame decline, can pass through
Adjust Manual relief valve to make door frame slowly put down, so as to avoid an accident.
In one embodiment, as shown in figure 4, the steering mouth CF of oil-feed valve block 10 control oil circuit is provided with check valve 12.
In this way, with the effect for preventing steering gear oil return " hired roughneck ".
In one embodiment, tilt and oil duct Z in parallel is provided with self-locking valve block 30, the oil duct Z in parallel and interflow raising valve block
On 20 oil duct A in parallel connection, for tilt self-locking valve block fuel feeding.
This forklift multi-way valve valve is applied to the fork truck system of large-tonnage double pump oil-feed work, and the outstanding feature of this valve is：Peace
Entirely, save.
Compared with conventional forklift banked direction control valves, forklift multi-way valve of the present utility model has the characteristics that：
(1) valve adds OPS functions, has function of safety protection, to prevent maloperation from causing damage or casualties
Provide safety guarantee.
(2) valve, which has, turns to priority function, and pump coming oil takes full advantage of P1 mouths all to work system when not turning to
The flow of oil, the speed of door frame rising is improved, improve operating efficiency.
(3) valve has raising Dual-pump flow-converging function, had not only met fork truck real work requirement but also had saved energy, same
Heat balance test is done on chassis, with conventional valve relative energy-saving 19%.The valve be meet lifting big flow work on the premise of, if
Lifting Dual-pump flow-converging is counted, accessory oil cylinder to inclination self-locking oil cylinder and below only has single pump work, rationally make use of system
Energy, serve good energy conservation and consumption reduction effects.
(4) the interflow raising valve block devises the first work oil ducts connected with the residual hydraulic pressure oil export of oil-feed valve block,
First work oil ducts only design a safety valve, avoid interference noise problem caused by two safety valves, in addition the second oil-feed
Mouth coming oil direct oil return box, energy dissipation when collaborating raising valve block and not working are reduced, more saved.
Preferred embodiment of the present utility model is the foregoing is only, is not limited to the utility model, for this
For the technical staff in field, the utility model can have various modifications and variations.It is all in the spirit and principles of the utility model
Within, any modification, equivalent substitution and improvements made etc., it should be included within the scope of protection of the utility model.
Claims (8)
1. a kind of forklift multi-way valve, including oil-feed valve block, interflow raising valve block, at least one Reversing valve plate and oil return valve block,
Characterized in that, the oil-feed valve block is provided with the first oil inlet and the oil-feed oil duct for providing hydraulic oil to follow-up valve block,
The interflow raising valve block is provided with the second oil inlet, be provided with the interflow raising valve block connected with middle position oil duct for
Follow-up valve block provides the oil duct in parallel of hydraulic oil, is set only between the oil duct in parallel and/or the oil-feed oil duct and back oil road
Individual safety valve one by one, the interflow raising valve block are three eight logical reversal valves, and described three eight logical reversal valves are formed in middle position
First connection valve pool and second oil inlet connect valve pool by first and connected with back oil road, described three eight logical reversal valves
The second connection valve pool is formed when playing raise-position and second oil inlet is collaborated to middle position oil by the second connection valve pool
Road.
2. forklift multi-way valve according to claim 1, it is characterised in that the oil-feed valve block turns to inlet valve to be preferential
Piece.
3. forklift multi-way valve according to claim 1, it is characterised in that the interflow raising valve block, which is provided with, to be used to control
The magnetic valve of oil return break-make, the break-make of the magnetic valve are on the scene associated with operator.
4. forklift multi-way valve according to claim 1, it is characterised in that the oil return valve block, which is provided with, to be used to control lifting
The magnetic valve of oil cylinder break-make, the break-make of the magnetic valve are on the scene associated with operator.
5. forklift multi-way valve according to claim 4, it is characterised in that the control of the lifting hydraulic fluid port of the interflow raising valve block
The oil circuit that liquefaction road connects with back oil road is provided with Manual relief valve.
6. forklift multi-way valve according to claim 1, it is characterised in that first oil inlet and the second oil inlet are located at
The top surface of valve block and it is adjacently positioned.
7. forklift multi-way valve according to claim 1, it is characterised in that at least one Reversing valve plate includes tilting certainly
Locking-valve piece.
8. forklift multi-way valve according to claim 1, it is characterised in that the control oil circuit of the steering mouth of the oil-feed valve block
It is provided with check valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720515526.2U CN206694343U (en) | 2017-05-10 | 2017-05-10 | A kind of forklift multi-way valve with preferential steering, Dual-pump flow-converging and OPS functions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720515526.2U CN206694343U (en) | 2017-05-10 | 2017-05-10 | A kind of forklift multi-way valve with preferential steering, Dual-pump flow-converging and OPS functions |
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| Publication Number | Publication Date |
|---|---|
| CN206694343U true CN206694343U (en) | 2017-12-01 |
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ID=60449191
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720515526.2U Active CN206694343U (en) | 2017-05-10 | 2017-05-10 | A kind of forklift multi-way valve with preferential steering, Dual-pump flow-converging and OPS functions |
Country Status (1)
| Country | Link |
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| CN (1) | CN206694343U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109779993A (en) * | 2018-12-15 | 2019-05-21 | 浙江海宏液压科技股份有限公司 | A kind of electricity proportional load sensitive multi-way valve |
| CN110965608A (en) * | 2019-11-25 | 2020-04-07 | 三一重机有限公司 | Generic tool confluence hydraulic system and excavator |
-
2017
- 2017-05-10 CN CN201720515526.2U patent/CN206694343U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109779993A (en) * | 2018-12-15 | 2019-05-21 | 浙江海宏液压科技股份有限公司 | A kind of electricity proportional load sensitive multi-way valve |
| CN109779993B (en) * | 2018-12-15 | 2023-09-19 | 浙江海宏液压科技股份有限公司 | Electric proportional load sensitive multi-way valve |
| CN110965608A (en) * | 2019-11-25 | 2020-04-07 | 三一重机有限公司 | Generic tool confluence hydraulic system and excavator |
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