CN106050779A - Multi-way valve of forklift - Google Patents
Multi-way valve of forklift Download PDFInfo
- Publication number
- CN106050779A CN106050779A CN201610563462.3A CN201610563462A CN106050779A CN 106050779 A CN106050779 A CN 106050779A CN 201610563462 A CN201610563462 A CN 201610563462A CN 106050779 A CN106050779 A CN 106050779A
- Authority
- CN
- China
- Prior art keywords
- valve
- way
- oil
- pressure
- spring cavity
- 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.)
- Granted
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
- F16K11/20—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by separate actuating members
- F16K11/22—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by separate actuating members with an actuating member for each valve, e.g. interconnected to form multiple-way valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B2013/002—Modular valves, i.e. consisting of an assembly of interchangeable components
Abstract
The invention discloses a multi-way valve of a forklift. The multi-way valve comprises a priority valve, a throttle valve, a three-way flow valve, an electromagnetic switch valve and a direct-acting overflow valve, wherein a pressure oil inlet communicates with the priority valve, and the priority valve is in backward tandem connection to one throttle valve; an oil outlet of the priority valve communicates with an oil inlet of the throttle valve; a spring cavity of the priority valve communicates with an oil outlet of the throttle valve; the oil outlet of the throttle valve supplies oil to a steering system; a spring cavity of the throttle valve communicates with an oil return opening; a non-spring cavity of the throttle valve communicates with the oil outlet of the throttle valve; the three-way flow valve communicates with the oil outlet of the priority valve; a spring cavity of the three-way flow valve communicates with the oil outlet of the priority valve; the direct-acting overflow valve and the electromagnetic switch valve are in tandem connection between the spring cavity of the three-way flow valve and the oil return opening; and a non-spring cavity of the three-way flow valve communicates with the oil outlet of the priority valve. In this way, the multi-way valve of the forklift can ensure that a space structure of the multi-way valve with a smaller mounting space is more compact, main unloading pressure and flow can be expanded, flow size can be regulated according to a workings state of a steering system, and energy waste is reduced.
Description
Technical field
The present invention relates to banked direction control valves and control technical field, particularly relate to a kind of forklift multi-way valve.
Background technology
The structure of the forklift multi-way valve that current existing fork truck commonly uses is: by oil-feed connection, an oil return connection and
Several work joint groups become, and are integrated with monostable flow divider on oil-feed connection simultaneously.
The operation principle of this forklift multi-way valve is: gear pump is to oil-feed alliance oil, through monostable flow divider, monostable shunting
Flow is preferentially supplied to the steering of fork truck by valve.Unnecessary flow is supplied to work system, when steering does not works,
Flow is supplied to work system by monostable flow divider, for equipments such as the lifting of fork truck, inclinations.
Current existing fork truck system, it is common to use be monostable flow divider adjust supply fork-truck steering flow, by
Flow in Monostable valve supply is a definite value, when so in steering work and not working, and the flow one that Monostable valve provides
Sample.If the flow turning to demand is big, when steering does not works, will result in energy dissipation.
The most existing fork truck, in order to protect the hydraulic system of fork truck, can install a pilot-operated type on oil-feed connection
Main overflow valve.But due to fork truck valve, to obtain installing space limited, it is necessary to the volume controlling fork truck valve is little.The installation of main overflow valve is empty
Between just had restriction.Therefore the installation of the main overflow valve of pilot-operated type will make the volume of fork truck valve become big.Band is arranged to fork truck space
Carry out difficulty.
Use now with fork truck is popularized, and people's safety to fork truck, comfortableness is had higher requirement.But it is existing
Some fork truck valves, are substantially stick control, and handle is arranged on the place of easily touching, so when electromotor works, if by mistake
Operation, will bring great potential safety hazard.
Summary of the invention
The technical problem that present invention mainly solves is to provide a kind of forklift multi-way valve, it is ensured that installing space is less, it is ensured that many
The space structure of road valve is more compact, can extend pressure and the flow of main off-load, it is possible to adjust according to the duty of steering
Amount of restriction size, it is possible to reduce the waste of energy.
For solving above-mentioned technical problem, the technical scheme that the present invention uses is: provide a kind of forklift multi-way valve, including
Valve body, has pressure-gradient control valve, choke valve, three-way flowrate valve, electromagnetic switch valve and direct acting overflow valve in valve body,
Pressure oil oil-in connects with pressure-gradient control valve, concatenates a choke valve after pressure-gradient control valve, the oil-out connection choke valve of pressure-gradient control valve
Oil-in, the spring cavity of pressure-gradient control valve connects with the oil-out of choke valve,
The oil-out of choke valve is that steering carries out fuel feeding, the spring cavity connection oil return opening of choke valve, the non-spring of choke valve
Chamber connects with the oil-out of choke valve,
Three-way flowrate valve connects with the oil-out of pressure-gradient control valve, concatenates direct acting overflow between the spring cavity of three-way flowrate valve and oil return opening
Valve and electromagnetic switch valve, the oil-out of the non-spring cavity connection pressure-gradient control valve of three-way flowrate valve.
In a preferred embodiment of the present invention, described choke valve is two-stage variable damp type choke valve, and choke valve leaves
It is provided with the first damping hole for controlling pressure oil flow and the second damping hole.
In a preferred embodiment of the present invention, the spring cavity of described pressure-gradient control valve and the oil-out of choke valve are through the first resistance
Buddhist nun connects behind hole.
In a preferred embodiment of the present invention, the non-spring cavity of described choke valve and the oil-out of choke valve are through second
Damping hole connects.
In a preferred embodiment of the present invention, the non-spring cavity of described choke valve takes over the second damping hole and first successively
The spring cavity of pressure-gradient control valve is connected after damping hole.
In a preferred embodiment of the present invention, described pressure-gradient control valve and choke valve are formed and can control steering fuel supply flow rate
The flow speed control valve of size.
In a preferred embodiment of the present invention, between spring cavity and the oil return opening of described three-way flowrate valve, it is communicated with direct acting
Overflow valve.
In a preferred embodiment of the present invention, between described direct acting overflow valve and three-way flowrate valve, it is parallel with an electromagnetism
Switch valve.
In a preferred embodiment of the present invention, between described direct acting overflow valve and three-way flowrate valve, it is parallel with a two-stage
The overflow valve controlled.
The invention has the beneficial effects as follows: forklift multi-way valve of the present invention uses direct acting overflow valve to coordinate making of three-way flowrate valve
With, installing space is less, in the case of same flow, it is not necessary to bigger overflow valve, it is ensured that the space structure of banked direction control valves is tighter
Gather；Record pressure by directly controlling direct acting overflow valve, accomplish that guide's multipole controls, thus extend pressure and the stream of main off-load
Amount；Use a kind of flow speed control valve with two sections of flows, regulate uninterrupted according to the duty of steering, it is possible to reduce energy
The waste of amount.
Accompanying drawing explanation
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, in embodiment being described below required for make
Accompanying drawing be briefly described, it should be apparent that, below describe in accompanying drawing be only some embodiments of the present invention, for
From the point of view of those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other according to these accompanying drawings
Accompanying drawing, wherein:
Fig. 1 is the structural representation of forklift multi-way valve one preferred embodiment of the present invention；
Fig. 2 is the A-A direction view of Fig. 1；
Fig. 3 is the B-B direction view of Fig. 1；
Fig. 4 is the H-H direction view of Fig. 2；
Fig. 5 is the K-K direction view of Fig. 4；
Fig. 6 is the D-D direction view of Fig. 3；
Fig. 7 is the hydraulic schematic diagram of the forklift multi-way valve of the present invention；
Fig. 8 be the present invention forklift multi-way valve in the control planning figure of pressure and flow；
In accompanying drawing, the labelling of each parts is as follows: 1, pressure-gradient control valve, and 2, choke valve, 3, three-way flowrate valve, 4, electromagnetic switch valve, 5, direct acting
Overflow valve, the 6, first damping hole, the 7, second damping hole.
Detailed description of the invention
Technical scheme in the embodiment of the present invention will be clearly and completely described below, it is clear that described enforcement
Example is only a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, this area is common
All other embodiments that technical staff is obtained under not making creative work premise, broadly fall into the model of present invention protection
Enclose.
Referring to Fig. 1 to Fig. 8, the embodiment of the present invention includes:
A kind of forklift multi-way valve, including valve body, has pressure-gradient control valve 1, choke valve 2, three-way flowrate valve 3, electromagnetic switch valve 4 and in valve body
Direct acting overflow valve 5.
The oil-in (P mouth) of pressure oil connects with pressure-gradient control valve 1, concatenates a choke valve 2, going out of pressure-gradient control valve 1 after pressure-gradient control valve 1
The oil-in of hydraulic fluid port connection choke valve 2.
After pressure-gradient control valve 1, the choke valve 2 of concatenation is two-stage variable damp type choke valve: offer for controlling on choke valve 2
First damping hole 6 and the second damping hole 7 of pressing pressure oil flow.
The spring cavity of pressure-gradient control valve 1 connects after the first damping hole 6 with the oil-out of choke valve 2.
The oil-out of choke valve 2 be PF, PF be the actuator port of steering, PF by the oil-out of choke valve 2 for turning
Fuel feeding is carried out, spring cavity connection oil return opening (T mouth) of choke valve to system.
The non-spring cavity of choke valve 2 connects through the second damping hole 7 with the oil-out of choke valve 2, choke valve 2 non-
Spring cavity is taken over the second damping hole 7 successively and is connected with also spring cavity with pressure-gradient control valve 1 after the first damping hole 6.
Three-way flowrate valve 3 connects with the oil-out of pressure-gradient control valve 1, between the spring cavity of three-way flowrate valve 3 and oil return opening (T mouth)
Concatenation direct acting overflow valve 5 and electromagnetic switch valve 4, the oil-out of the non-spring cavity connection pressure-gradient control valve 1 of three-way flowrate valve 3.
The operation principle of forklift multi-way valve of the present invention is:
After fork truck starts, oil pump is from oil-in oil-feed, due to the effect of pressure-gradient control valve 1, first to steering fuel feeding:
When steering does not works, PF mouth does not has pressure, choke valve 2 not to commutate, and pressure-gradient control valve 1 and choke valve 2 would be combined into one
Individual flow speed control valve with a less constant flow fuel feeding to steering；
When steering works, PF builds pressure, and choke valve 2 commutates, and now the aperture area of choke valve 2 increases, pressure-gradient control valve 1 and joint
Stream valve 2 would be combined into a flow speed control valve with a bigger constant flow fuel feeding to steering；
When the spool of work system commutates the most completely, when i.e. having flow can flow into T mouth by PA mouth, the flow of pump is by excellent
Again by throttle orifice 8 after first valve 1, so will give birth to pressure reduction at the two ends of three-way flowrate valve 3, be more than by the pressure reduction of throttle orifice 8
During the unlatching pressure of three-way flowrate valve 3, three-way flowrate valve 3 may turn on off-load, and the flow of such pump will pass through three-way flowrate
Valve 3 Low-pressure load discharge, thus can make the flow of pump carry out Low-pressure load discharge in first, and such structural advantages is, in banked direction control valves
Will not there be relation position crushing (i.e. the pressure loss of PA to T) with the sheet number of banked direction control valves, and the quantity of valve block does not interferes with hydraulic multichannel
The middle position crushing of valve；
When work system (promote or tilt) works: first forklift multi-way valve electromagnetic switch valve 4 (must not sense people not sit by electricity
On the seat), if not sitting on the seat, electromagnetic switch valve 4 connects the spring cavity of three-way flowrate valve 3, lays down three-way flowrate valve 3
The hydraulic oil of spring cavity, such three-way flowrate valve 3 Low-pressure load discharge, equipment can not work；
If electromagnetic switch valve 4 electric (sensing people sits on the seat), the spring cavity of three-way flowrate valve 3 will set up pressure, such three
Through-current capacity valve 3 can not be opened, and work system can normally work, if the pressure of work system exceedes direct acting overflow valve 5
Off-load, three-way flowrate valve 3 are opened high pressure unloading by overflow, the spring cavity of such three-way flowrate valve 3 by pressure direct acting overflow valve.
Above-mentioned forklift multi-way valve changes the structure of Monostable valve, uses and a kind of has the flow speed control valve of two sections of flows (by excellent
First valve and choke valve combination are formed):
When turn to do not work time, flow speed control valve adjusts damping according to the pressure feedback of steering, makes the flow of steering become
Little；When turning to work, flow speed control valve adjusts damping according to the pressure feedback of steering, makes the flow of steering meet and turns
To the requirement of system, the waste of energy so just can be reduced relative to existing system.
This forklift multi-way valve eliminates the scheme installing the main overflow valve of pilot-operated type on oil-feed connection, uses a low discharge
Direct acting overflow valve 5 and a three-way flowrate valve 3 substitute pilot operated compound relief valve, owing to the volume of the direct acting overflow valve 5 of low discharge is little,
And three-way flowrate valve 3 to cross stream flow big and size is little, so can solve the problem that forklift multi-way valve space is arranged.
Use direct acting overflow valve 5 and three-way flowrate valve 3 simultaneously, can be easily at direct acting overflow valve 5 and three-way flowrate
An electromagnetic switch valve 4 in parallel or the overflow valve of a two-step evolution in parallel between valve 3, this kind of structure also eliminates by sending out simultaneously
During motivation work, the potential safety hazard that maloperation causes.
Forklift multi-way valve of the present invention provides the benefit that:
Use direct acting overflow valve 5 to coordinate the use of three-way flowrate valve 3, make installing space less, in the case of same flow, be not required to
Overflow valve that will be bigger, so the space structure of banked direction control valves is more compact；
Under the most this structure situation, can directly control direct acting overflow valve 5 and record pressure, accomplish that guide's multipole controls, thus
Extend pressure and the flow of main off-load；
Use a kind of flow speed control valve with two sections of flows: when turn to do not work time, flow speed control valve is according to the pressure feedback of steering
Adjust damping, make the flow of steering diminish；When turning to work, the pressure feedback of flow speed control valve more steering adjusts
Damping, makes the flow of steering meet the requirement of steering, so relative to existing system, it is possible to reduce energy
Waste.
The foregoing is only embodiments of the invention, not thereby limit the scope of the claims of the present invention, every utilize this
Equivalent structure or equivalence flow process that bright description is made convert, or are directly or indirectly used in other relevant technology neck
Territory, is the most in like manner included in the scope of patent protection of the present invention.
Claims (9)
1. a forklift multi-way valve, including valve body, has pressure-gradient control valve, choke valve, three-way flowrate valve, electromagnetic switch valve and straight in valve body
Dynamic overflow valve, it is characterised in that
Pressure oil oil-in connects with pressure-gradient control valve, concatenates a choke valve after pressure-gradient control valve, the oil-out connection choke valve of pressure-gradient control valve
Oil-in, the spring cavity of pressure-gradient control valve connects with the oil-out of choke valve,
The oil-out of choke valve is that steering carries out fuel feeding, the spring cavity connection oil return opening of choke valve, the non-spring of choke valve
Chamber connects with the oil-out of choke valve,
Three-way flowrate valve connects with the oil-out of pressure-gradient control valve, concatenates direct acting overflow between the spring cavity of three-way flowrate valve and oil return opening
Valve and electromagnetic switch valve, the oil-out of the non-spring cavity connection pressure-gradient control valve of three-way flowrate valve.
Forklift multi-way valve the most according to claim 1, it is characterised in that described choke valve is the throttling of two-stage variable damp type
Valve, choke valve offers the first damping hole for controlling pressure oil flow and the second damping hole.
Forklift multi-way valve the most according to claim 2, it is characterised in that the spring cavity of described pressure-gradient control valve goes out with choke valve
Hydraulic fluid port connects after the first damping hole.
Forklift multi-way valve the most according to claim 2, it is characterised in that the non-spring cavity of described choke valve and choke valve
Oil-out connects through the second damping hole.
Forklift multi-way valve the most according to claim 2, it is characterised in that the non-spring cavity of described choke valve takes over successively
The spring cavity of pressure-gradient control valve is connected after two damping holes and the first damping hole.
Forklift multi-way valve the most according to claim 1, it is characterised in that described pressure-gradient control valve and choke valve are formed and can control to turn
Flow speed control valve to system fuel supply flow rate size.
Forklift multi-way valve the most according to claim 1, it is characterised in that the spring cavity of described three-way flowrate valve and oil return opening
Between be communicated with direct acting overflow valve.
Forklift multi-way valve the most according to claim 8, it is characterised in that between described direct acting overflow valve and three-way flowrate valve
It is parallel with an electromagnetic switch valve.
Forklift multi-way valve the most according to claim 8, it is characterised in that between described direct acting overflow valve and three-way flowrate valve
It is parallel with the overflow valve of a two-step evolution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610563462.3A CN106050779B (en) | 2016-07-18 | 2016-07-18 | forklift multi-way valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610563462.3A CN106050779B (en) | 2016-07-18 | 2016-07-18 | forklift multi-way valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106050779A true CN106050779A (en) | 2016-10-26 |
| CN106050779B CN106050779B (en) | 2018-01-23 |
Family
ID=57186927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610563462.3A Active CN106050779B (en) | 2016-07-18 | 2016-07-18 | forklift multi-way valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106050779B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107327431A (en) * | 2017-08-31 | 2017-11-07 | 雷沃重工股份有限公司 | One kind shunting multichannel valve module |
| CN107620811A (en) * | 2017-10-30 | 2018-01-23 | 圣邦集团有限公司 | A kind of banked direction control valves of first with pressure-gradient control valve |
| CN108412831A (en) * | 2018-05-09 | 2018-08-17 | 河北华春液压汽配有限公司 | Shunt variable voltage control commutation pile-up valve |
| CN107620811B (en) * | 2017-10-30 | 2024-04-19 | 圣邦集团有限公司 | Multi-way valve with priority valve in head connection |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3568868A (en) * | 1969-09-08 | 1971-03-09 | Clark Equipment Co | Hydraulic system for a lift truck |
| CN102900715A (en) * | 2012-10-08 | 2013-01-30 | 北京索普液压机电有限公司 | Hydraulic control system for forklift, and forklift |
| CN203202304U (en) * | 2013-03-27 | 2013-09-18 | 浙江海宏液压科技股份有限公司 | Multifunctional forklift multi-way valve |
| CN103790889A (en) * | 2014-03-10 | 2014-05-14 | 浙江海宏液压科技股份有限公司 | Oil inlet valve block and compound flow control multi-way valve |
| CN205117856U (en) * | 2015-08-25 | 2016-03-30 | 马鞍山唐拓凿岩机械有限公司 | Liquid accuse double speed pressure -gradient control valve piece |
| CN206017302U (en) * | 2016-07-18 | 2017-03-15 | 江苏恒立液压科技有限公司 | Forklift multi-way valve |
-
2016
- 2016-07-18 CN CN201610563462.3A patent/CN106050779B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3568868A (en) * | 1969-09-08 | 1971-03-09 | Clark Equipment Co | Hydraulic system for a lift truck |
| CN102900715A (en) * | 2012-10-08 | 2013-01-30 | 北京索普液压机电有限公司 | Hydraulic control system for forklift, and forklift |
| CN203202304U (en) * | 2013-03-27 | 2013-09-18 | 浙江海宏液压科技股份有限公司 | Multifunctional forklift multi-way valve |
| CN103790889A (en) * | 2014-03-10 | 2014-05-14 | 浙江海宏液压科技股份有限公司 | Oil inlet valve block and compound flow control multi-way valve |
| CN205117856U (en) * | 2015-08-25 | 2016-03-30 | 马鞍山唐拓凿岩机械有限公司 | Liquid accuse double speed pressure -gradient control valve piece |
| CN206017302U (en) * | 2016-07-18 | 2017-03-15 | 江苏恒立液压科技有限公司 | Forklift multi-way valve |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107327431A (en) * | 2017-08-31 | 2017-11-07 | 雷沃重工股份有限公司 | One kind shunting multichannel valve module |
| CN107620811A (en) * | 2017-10-30 | 2018-01-23 | 圣邦集团有限公司 | A kind of banked direction control valves of first with pressure-gradient control valve |
| CN107620811B (en) * | 2017-10-30 | 2024-04-19 | 圣邦集团有限公司 | Multi-way valve with priority valve in head connection |
| CN108412831A (en) * | 2018-05-09 | 2018-08-17 | 河北华春液压汽配有限公司 | Shunt variable voltage control commutation pile-up valve |
| CN108412831B (en) * | 2018-05-09 | 2023-07-25 | 河北华春液压汽配有限公司 | Shunt pressure-regulating speed-regulating reversing integrated valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106050779B (en) | 2018-01-23 |
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