CN206985637U - With the forklift hydraulic system for absorbing hydraulic pressure impulse circuit - Google Patents
With the forklift hydraulic system for absorbing hydraulic pressure impulse circuit Download PDFInfo
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- CN206985637U CN206985637U CN201720493201.9U CN201720493201U CN206985637U CN 206985637 U CN206985637 U CN 206985637U CN 201720493201 U CN201720493201 U CN 201720493201U CN 206985637 U CN206985637 U CN 206985637U
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Abstract
It the utility model is related to the forklift hydraulic system for absorbing hydraulic pressure impulse circuit.Including two lift oil tanks, two dump rams, multiple directional control valve, oil pump and hydraulic oil container；Multiple directional control valve includes lifting Reversing valve plate and inclined reversing valve piece, and it is three six-way transfer valves to lift Reversing valve plate and inclined reversing valve piece；Improvement is：First lifting work mouth of lifting Reversing valve plate is respectively communicated with two lift oil tanks and one-way throttle valve by three-way pipe；Second mouth of pipe of three-way pipe connects accumulator by one-way throttle valve, and accumulator and one-way throttle valve form buffer loop；During raising, when unexpected close port, because inertia can decline suddenly, accumulator discharges pressure oil by one-way throttle valve, supplements the oil cylinder caused by pressure declines suddenly and shakes for oil circuit pressure between hoist cylinder and multiple directional control valve；Similarly, during decline, valve port is closed suddenly, and accumulator is by one-way throttle valve Absorbing hydraulic pulsation, so as to reduce hydraulic shock.
Description
Technical field
The utility model belongs to forklift hydraulic system technical field, and in particular to a kind of forklift door frame raising or the liquid of decline
Pressure system.
Background technology
The raising of forklift door frame and decline are that the direction of oil circuit is controlled by control valve.Liquid flows in pipeline
When, because control valve such as closes at the reason suddenly, make liquid stream stop flowing suddenly, the kinetic energy of liquid becomes pressure energy, is produced before valve
Raw high pressure, higher-pressure region are propagated in the form of pressure wave in pipeline, form hydraulic shock.Its pressure value may be higher by normal pressure
More than several times, have a strong impact on hydraulic system element and sealing device, and then influence the normal work of system, can also make in addition be
System produces noise and vibration.In addition, fork truck band is carried when running into bumpy road, door frame is hit vibration, and then causes lift oil tank
Shake, on the one hand causes tote easily to be come off from pallet fork, and on the other hand this jitter conditions, which can also pass to, is sitting in seat
On driver, easily cause driver fatigue.
Utility model content
In order to absorb or relax surge, the unexpected stop motion of oil cylinder caused by reversal valve commutation suddenly and road bumps
With oil cylinder shake caused by surge, the utility model provide it is a kind of have absorb hydraulic pressure impulse circuit truck hydraulic system.
Include two lift oil tanks, 8, two dump rams 9, more with the forklift hydraulic system for absorbing hydraulic pressure impulse circuit
Way reversing valve 2, oil pump 11 and hydraulic oil container 1；The multiple directional control valve 2 includes lifting Reversing valve plate 4, the and of inclined reversing valve piece 5
Safety valve 3, the lifting Reversing valve plate 4 and inclined reversing valve piece 5 are three six-way transfer valves；The lifting Reversing valve plate 4
The first lifting work mouth A1 be respectively communicated with the rodless cavities of two lift oil tanks 8；The first of the inclined reversing valve piece 5 tilts
Outlet A2 and the second tilt outlet B2 connects with the rod chamber and rodless cavity of dump ram 9 respectively；The import of the oil pump 11 connects
Lead to hydraulic oil container 1, the outlet of oil pump 11 the import P of multiple directional control valve 2；The oil return inlet T of multiple directional control valve 2 connects
Hydraulic oil container 1；Improvement is：
First lifting work mouth A1 of the lifting Reversing valve plate 4 connects first mouth of pipe of three-way pipe, and the of three-way pipe
Three mouths of pipe are respectively communicated with two lift oil tanks 8；Second mouth of pipe of three-way pipe connects accumulator 7 by one-way throttle valve 6, stores
Energy device 7 and one-way throttle valve 6 are connected in series composition buffer gear；Two lift oil tanks 8 and one-way throttle valve 6 are in be connected in parallel.
During raising, as the first lifting work mouth A1 of unexpected closing lifting Reversing valve plate 4, two lift oil tanks
Oil circuit pressure between 8 and multiple directional control valve 2 is because inertia can decline suddenly, and now, accumulator 7 is discharged by one-way throttle valve 6
Pressure oil, supplement the oil cylinder caused by pressure declines suddenly and shake；
During decline, when the first lifting work mouth A1 for lifting Reversing valve plate 4 is closed suddenly, liquid flowing is moved
Pressure energy can be become, pressure in pipeline is drastically raised, accumulator 7 has slowed down pipe by the Absorbing hydraulic pulsation of one-way throttle valve 6
The pace of change of liquid momentum in road, so as to reduce hydraulic shock.
The technical scheme further limited is as follows：
The one-way throttle valve 6 is composed in parallel by choke valve 61 and check valve 62.
Advantageous effects of the present utility model embody in the following areas：
1. the utility model is utilized mounted in the accumulator and throttling one-way valve between multiple directional control valve and two lift oil tanks,
Absorb or mitigation reversal valve commutates suddenly, road bumps, the unexpected stop motion of oil cylinder and oil cylinder shake generation etc. because of the speed of liquid stream
Degree and direction drastically change caused surge, reduce the damage to elements such as pipeline, joint, valve, oil cylinders.
2. the utility model is simple in construction, manufacturing cost is low, easy to operate, and practicality is good.
Brief description of the drawings
Fig. 1 is the utility model structure diagram.
Sequence number in upper figure：Hydraulic oil container 1, multiple directional control valve 2, safety valve 3, lifting Reversing valve plate 4, inclined reversing valve piece 5,
One-way throttle valve 6, accumulator 7, lift oil tank 8, dump ram 9, annular back oil road 10, oil pump 11, choke valve 61, check valve
62。
Embodiment
Below in conjunction with the accompanying drawings, the utility model is further described by embodiment.
Referring to Fig. 1, there is the forklift hydraulic system for absorbing hydraulic pressure impulse circuit to include two lift oil tanks, 8, two inclinations
Oil cylinder 9, multiple directional control valve 2, oil pump 11 and hydraulic oil container 1；Multiple directional control valve 2 includes lifting Reversing valve plate 4, inclined reversing valve piece
5 and safety valve 3, it is three six-way transfer valves to lift Reversing valve plate 4 and inclined reversing valve piece 5.
First lifting work mouth A1 of the lifting Reversing valve plate 4 is respectively communicated with two lift oil tanks 8 by three-way pipe；
The first outlet A2 of the inclined reversing valve piece 5 connects the rod chamber of two dump rams 9, and the second of inclined reversing valve piece 5
Outlet B2 connects the rodless cavity of two dump rams 9.The inlet communication of oil pump 11 hydraulic oil container 1, and outlet multichannel
The import P of reversal valve 2；The oil return opening of multiple directional control valve 2 connects hydraulic oil container 1.
The import P of multiple directional control valve 2 divides two-way by internal oil passages, all the way with the inlet communication of safety valve 3, safety valve 3
Outlet communicated by annular back oil road 10 with the oil return inlet T of multiple directional control valve 2；Another way and the entrance of lifting Reversing valve plate 4
The first interface of three-way pipe is connected, and the second interface of entrance three-way pipe communicates with lifting the first oil inlet C of Reversing valve plate 4, enters
3rd interface of mouth three-way pipe is communicated by inlet one-way valve with lifting the second oil inlet D of Reversing valve plate 4；Lift Reversing valve plate
4 the first oil return opening E communicates with annular back oil road 10；Lift the second oil return opening G of Reversing valve plate 4 and the annular phase of back oil road 10
It is logical；The the second oil-out F for lifting Reversing valve plate 4 is connected with lifting the first lifting work mouth A1 of Reversing valve plate 4；Lift reversal valve
First lifting work mouth A1 of piece 4 is connected with the first interface of three-way pipe；The second interface of three-way pipe enters with one-way throttle valve 6
Mouth is connected, and the outlet of one-way throttle valve 6 communicates with accumulator 7；3rd interface of three-way pipe passes through another three-way pipe and two
Hoist cylinder 8 connects；Two lift oil tanks 8 and one-way throttle valve 6 are in be connected in parallel.The first of inclined reversing valve piece 5 tilts work
Make mouth A2 and the second inclined work mouth B2 connects with the rod chamber and rodless cavity of dump ram 9 respectively；Annular back oil road 10 passes through
Oil return inlet T connects fuel tank 1.
Improvement is：Accumulator 7 and one-way throttle valve 6 be connected in series form accumulator buffer loop, one-way throttle valve 6 by
Choke valve 61 and check valve 62 compose in parallel.
When lifting Reversing valve plate 4 is in middle position, the first oil inlet C communicates with the first oil return opening E；When lifting Reversing valve plate
When 4 commutations are to right position, the second oil inlet D communicates with the second oil-out F；When lifting Reversing valve plate 4 commutates to left position, first enters
Hydraulic fluid port C communicates with the first oil return opening E, and the second oil-out F communicates with the second oil return opening G.
Operation principle of the present utility model is described as follows：
When lifting Reversing valve plate 4 and inclined reversing valve piece 5 and being in middle position, import P that hydraulic oil passes through multiple directional control valve 2
Through the first oil inlet C, the first oil return opening E, annular back oil road 10, the oil return inlet T connection hydraulic oil container 1 that lift Reversing valve plate 4.
When forklift picking thing does raising action, lifting Reversing valve plate 4 commutates to right position, the pressure oil of the output of oil pump 11
The entrance three-way pipe of lifting Reversing valve plate 4 is entered by the import P of multiple directional control valve 2, passes through inlet one-way valve, the second oil-feed
Mouth D, the second oil-out F, the first lifting work mouth A1, three-way pipe are divided into two-way, pass through the check valve in one-way throttle valve 6 all the way
62 enter accumulator 7, give the fliud flushing of accumulator 7, and another way enters two hoist cylinders 8, realize the raising action of handling goods.Its
Middle safety valve 3 is the maximum working pressure for limiting oil pump 11.
During raising, lifting Reversing valve plate 4 is allowed to commutate to middle position suddenly, the second oil-out F and the second oil inlet D
The oil circuit pressure that inner passage is closed between two lift oil tanks 8 and multiple directional control valve 2 suddenly because inertia can decline suddenly, this
When, accumulator 7 discharges pressure oil by one-way throttle valve 6, supplements the oil cylinder caused by pressure declines suddenly and shakes；
Unexpected close port, because inertia can decline suddenly, this is accumulation of energy for oil circuit pressure between hoist cylinder and banked direction control valves
Device can discharge pressure oil by choke valve 61, supplement the oil cylinder caused by pressure declines suddenly and shake.
When goods declines, lifting Reversing valve plate 4 commutates to left position.Two hoist cylinders 8 decline the pressure oil warp of output
The the first lifting work mouth A1, the second oil-out F, the second oil return opening G of lifting Reversing valve plate 4 are crossed through the annular flow back fluid of back oil road 10
Press oil case 1.
During decline, lifting Reversing valve plate 4 is allowed to commutate to middle position suddenly, the second oil-out F and the second oil return opening G
Inner passage is closed suddenly, and the kinetic energy of liquid flowing becomes pressure energy, pressure in pipeline is drastically raised, accumulator 7 passes through list
To the Absorbing hydraulic pulsation of choke valve 6, the pace of change of liquid momentum in pipeline is slowed down, so as to reduce hydraulic shock.
Claims (2)
1. changed with the forklift hydraulic system for absorbing hydraulic pressure impulse circuit, including two lift oil tanks, two dump rams, multichannels
To valve, oil pump and hydraulic oil container；The multiple directional control valve includes lifting Reversing valve plate, inclined reversing valve piece and safety valve, described
It is three six-way transfer valves to lift Reversing valve plate and inclined reversing valve piece；First lifting work mouth of the lifting Reversing valve plate
A1 is respectively communicated with the rodless cavity of two lift oil tanks；First tilt outlet A2 of the inclined reversing valve piece and second is tilted
Mouth B2 connects with the rod chamber and rodless cavity of dump ram respectively；The inlet communication of the oil pump hydraulic oil container, and oil pump goes out
Mouth connects the import P of multiple directional control valve；The oil return inlet T of multiple directional control valve connects hydraulic oil container；It is characterized in that：
First lifting work mouth A1 of the lifting Reversing valve plate connects first mouth of pipe of three-way pipe, the 3rd mouth of pipe of three-way pipe
It is respectively communicated with two lift oil tanks；Second mouth of pipe of three-way pipe connects accumulator, accumulator and list by one-way throttle valve
Composition buffer gear is connected in series to choke valve；Two lift oil tanks and one-way throttle valve are in be connected in parallel；
During raising, during the first lifting work mouth A1 for closing lifting Reversing valve plate when unexpected, two lift oil tanks and more
Oil circuit pressure between way reversing valve is because inertia can decline suddenly, and now, accumulator passes through one-way throttle valve and discharges pressure oil, mends
The oil cylinder caused by pressure declines suddenly is filled to shake；
During decline, when the first lifting work mouth A1 for lifting Reversing valve plate is closed suddenly, the kinetic energy of liquid flowing becomes
Into pressure energy, pressure in pipeline is set drastically to raise, accumulator has slowed down liquid in pipeline by one-way throttle valve Absorbing hydraulic pulsation
The pace of change of body momentum, so as to reduce hydraulic shock.
2. according to claim 1 have the forklift hydraulic system for absorbing hydraulic pressure impulse circuit, it is characterised in that：The list
Composed in parallel to choke valve by choke valve and check valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720493201.9U CN206985637U (en) | 2017-05-05 | 2017-05-05 | With the forklift hydraulic system for absorbing hydraulic pressure impulse circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720493201.9U CN206985637U (en) | 2017-05-05 | 2017-05-05 | With the forklift hydraulic system for absorbing hydraulic pressure impulse circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206985637U true CN206985637U (en) | 2018-02-09 |
Family
ID=61393025
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720493201.9U Active CN206985637U (en) | 2017-05-05 | 2017-05-05 | With the forklift hydraulic system for absorbing hydraulic pressure impulse circuit |
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| Country | Link |
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| CN (1) | CN206985637U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107021435A (en) * | 2017-05-05 | 2017-08-08 | 安徽合力股份有限公司 | With the forklift hydraulic system for absorbing hydraulic pressure impulse circuit |
-
2017
- 2017-05-05 CN CN201720493201.9U patent/CN206985637U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107021435A (en) * | 2017-05-05 | 2017-08-08 | 安徽合力股份有限公司 | With the forklift hydraulic system for absorbing hydraulic pressure impulse circuit |
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