CN103449334A - Novel multi-way valve - Google Patents
Novel multi-way valve Download PDFInfo
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- CN103449334A CN103449334A CN2013104014973A CN201310401497A CN103449334A CN 103449334 A CN103449334 A CN 103449334A CN 2013104014973 A CN2013104014973 A CN 2013104014973A CN 201310401497 A CN201310401497 A CN 201310401497A CN 103449334 A CN103449334 A CN 103449334A
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Abstract
The invention discloses a novel multi-way valve, which comprises an oil inlet valve block, a lifting valve block, an oblique valve block, an oil return valve block, a plug screw, an O-shaped valve rod, a valve body, a A2-cavity load control valve, a positioning spring, a one-way valve, an oil return channel, a working cavity B, a triangular oil channel, a middle-position oil channel, an annular oil channel, a working cavity A, a hydraulic cylinder rodless cavity and a hydraulic cylinder rod-including cavity. According to the novel multi-way valve, an external load control valve arranged on a valve body is adopted instead of a self-locking valve embedded into a valve rod, and the magnitude of the pressure of the external load control valve can be set according to the load pressure. The most common O-shaped valve rod is adopted instead of an oblique self-locking valve rod which has extremely high requirement on the machining accuracy. The novel multi-way valve has the advantages of high manufacturability, easiness in assembling and convenience in maintaining; moreover, potential safety hazard can be eliminated effectively, and failure rate is reduced; and meanwhile, the requirement on self-locking during forward and backward inclination of a gantry can be met.
Description
Technical field
The present invention relates to valve device, be specifically related to a kind of multi-way valve.
Background technology
At present, more the Domestic Forklift multiway valve adopts in valve rod and latching valve to be installed to meet the lean forward safety requirements of self-locking of forklift door frame.There is following problem in this version:
(1) because the self-locking spool is arranged in valve rod, thus very high to the requirement on machining accuracy of valve rod hole, complex process, process-cycle and cost increase by 3～4 times than common valve rod, and conforming product rate only has 60%～70%.
(2) when the quality of fit of self-locking spool in valve rod is not high, there will be latching valve not open, cause door frame to be failure to actuate or the malfunctioning door frame phenomenon that automatically leans forward that occurs of self-locking, have serious potential safety hazard.
(3) when forklift door frame leans forward. due to needs by 5～6 staggered apertures (Φ 0.8～Φ 1.1) oil extraction on valve rod, therefore can produce at fork truck hydraulic tilt cylinder rod chamber the back pressure that journey is high (is up to 40MPa, and actual loading pressure only has 9～11MPa). cause the hydraulic efficiency pressure system temperature rise, easily cause the damage of hydraulic efficiency pressure system element.
(4) the self-locking spool can only be arranged on A2 chamber or B2 chamber (referring to Fig. 1) of multiway valve, when all there is to requiring of self-locking in two chambeies.As high mast forklift truck, can't realize.
Summary of the invention
Purpose of the present invention, exactly in order to solve the problem of above-mentioned existing existence, provide a kind of multi-way valve to improve its manufacturability; And effectively remove potential safety hazard, reduce system failure rate; Meet all requirements of energy self-locking of door frame anteversion and retroversion.
The present invention is by the following technical solutions: a kind of multi-way valve comprises the oil-feed valve block, the valve block that hoists, inclination valve block, oil return valve block, plug screw, valve rod, valve body, A2 chamber Load Control Valve, retainer spring, check valve, back oil road, B epitrochoidal chamber, triangle oil duct, meta oil duct, the parts such as oil duct, A epitrochoidal chamber, hydraulic actuating cylinder rodless cavity, hydraulic actuating cylinder rod chamber go in ring.
The cancellations such as the self-locking spool (latching valve) in described valve rod, spring, replace with Load Control Valve.
Described valve rod adopts the most frequently used O shape valve rod to replace the high inclination self-locking valve rod of requirement on machining accuracy.
The plug-in Load Control Valve is installed on described valve body, and the size of control presssure is set according to load pressure.
The accompanying drawing explanation
Figure l is built in the latching valve principle of work in valve rod
The structure of Fig. 2 multi-way valve forms and principle of work
Hoist valve block, 3-inclination valve block, 4-oil return valve block, 5-plug screw, 6-O shape valve rod, 7-valve body, 8-A2 chamber Load Control Valve, 9-retainer spring, 10-check valve, 11-back oil road, 12-B epitrochoidal chamber, 13-triangle oil duct, 14-meta oil duct, 15-go in ring oil duct, 16-A epitrochoidal chamber, 17-hydraulic actuating cylinder rodless cavity, l8-hydraulic actuating cylinder rod chamber of 1-oil-feed valve block, 2-in figure.
The specific embodiment
The structure that Fig. 2 is multi-way valve and principle of work, the high pressure oil of main pump enters the oil-feed valve block l of chip multiway valve (P mouth), through monostable flow divider valve wherein, is divided into two parts: a part through multiway valve hoist valve block 2 (A1 mouth) to lifting hydraulic cylinder or through inclination valve block 3 (A2 or B2 mouth) to hydraulic tilt cylinder; Another part high pressure oil with constant flow to P mouth (connecing deflector), control turning to of fork truck.During center position, high pressure oil is through the T of oil return valve block 4 mouth oil sump tank.
The oil-feed valve block 1 of multi-way valve, hoist valve block 2 and oil return valve block 4 all identical with common forklift multi-way valve, different is that inclination valve block 3 becomes external Load Control Valve (being contained on valve body) by built-in self-locking valve (latching valve is contained in valve rod).The size of control presssure can be set according to load pressure.
When forklift door frame need to lean forward, advance O shape valve rod 6 (valve rod moves to right) compression set spring 9, valve body 7 meta oil ducts 14 are shut by O shape valve rod 6, the pressure oil of main pump is opened the check valve 10 on valve body through oil-feed valve block l, the valve block 2 that hoists to the triangle oil duct 13. on valve body 7, enter the belt oil duct 15 of valve body 7, again through the opening of O shape valve rod 6, to B epitrochoidal chamber 12 (side is stopped up by plug screw 5), rodless cavity 17 through the B2 mouth to hydraulic tilt cylinder, promote the hydraulic tilt cylinder piston and move right.Now, the pressure oil of hydraulic actuating cylinder rod chamber 18 is opened as chamber Load Control Valve 8 (the pressure size of opening control cock is set according to load) through the A2 mouth, enter the opening of O shape valve rod 6 to A epitrochoidal chamber 16, to back oil road 11 oil sump tanks of valve body 7, forklift door frame leans forward.
While needing the door frame hypsokinesis. pull out O shape valve rod 6 (valve rod moves to left), above-mentioned fluid advances the triangle oil duct 13 on people's valve body 7, open check valve 10 on valve body, advance the belt oil duct 15 of people's valve body 7, one side is through the opening of O shape valve rod 6, advance people A epitrochoidal chamber 16 and open the check valve in A2 chamber Load Control Valve 8, the rod chamber 18 through working hole A2 to hydraulic tilt cylinder, promote hydraulic tilt cylinder and move to left.Now. the oil of hydraulic actuating cylinder rodless cavity 17, through the B2 mouth, enters the opening of O shape valve rod 6 to B epitrochoidal chamber 12, through back oil road 11 oil sump tanks of valve body 7.
During engine off. main pump is fuel feeding not, even chaufeur error operations handle (being O shape valve rod 6), owing to not having pressure oil to advance people's multiway valve and hydraulic actuating cylinder (being that the hydraulic tilt cylinder rodless cavity enters without pressure oil), just can't transfer energy to the rod chamber of hydraulic tilt cylinder. therefore, can't open as chamber Load Control Valve 8, fluid is locked in the hydraulic tilt cylinder rod chamber and (plays tilt lock), and the door frame forward swing is by locking.During the door frame hypsokinesis, because in the oil duct of B2 chamber, there is no control cock, 17 oil returns of inclined cylinder rodless cavity are unrestricted, so without latch functions.
When the forklift door frame anteversion and retroversion are all required to have auto-lock function (as high mast forklift truck), the original design forklift multi-way valve can't realize (only at one-sided A2 mouth, this function being arranged, as shown in Figure l).Multi-way valve can solve by two working holes (A2 and B2), Load Control Valve being set respectively.
When the needs door frame leans forward, O shape valve rod 6 is moved to right, operating mode is substantially similar to front.
While needing the door frame hypsokinesis, O shape valve rod 6 moves to left, and pulls out valve rod.Spring 9 stretches, valve body 7 meta oil ducts 14 are shut by O shape valve rod 6, main pump pressure oil out is through oil-feed valve block l, the triangle oil duct 13 of valve block 2 to valve body 7 hoists, open check valve 10 on valve body, advance the belt oil duct 15 of people's valve body 7, opening through O shape valve rod 6, to A epitrochoidal chamber 16, open the check valve in A2 chamber Load Control Valve 8, the rod chamber 18 to hydraulic tilt cylinder through the A2 mouth again, hydraulic cylinder piston rod moves to left, this moment, the pressure oil of hydraulic actuating cylinder rodless cavity 17 is opened B2 chamber Load Control Valve 19 (opening the wealthy pressure size of control sets according to load) through the B2 mouth, enter the opening of O type valve rod 6 through B epitrochoidal chamber 12, through the back oil road 1l of valve body 7 oil sump tank, the forklift door frame hypsokinesis.
When forklift engine is flame-out, main pump does not dry oil, even chaufeur error operations handle (being O shape valve rod 6), owing to not having pressure oil to advance people's multiway valve and hydraulic actuating cylinder (being that the people is all advanced without pressure oil in hydraulic tilt cylinder two chambeies), just can't, by corresponding another chamber of hydraulic tilt cylinder that is delivered to of energy, therefore, can't open A2 or B2 chamber Load Control Valve 8 or 19, fluid is locked in hydraulic tilt cylinder (playing tilt lock) in oil pocket separately, side arm lean forward and the hypsokinesis action all by locking.
Claims (3)
1. a multi-way valve is characterized in that: comprise the oil-feed valve block, the valve block that hoists, inclination valve block, oil return valve block, plug screw, valve rod, valve body, A2 chamber Load Control Valve, retainer spring, check valve, back oil road, B epitrochoidal chamber, triangle oil duct, meta oil duct, oil duct, A epitrochoidal chamber, hydraulic actuating cylinder rodless cavity, hydraulic actuating cylinder rod chamber go in ring.
2. multi-way valve according to claim 1, it is characterized in that: in described valve rod, built-in latching valve is arranged on the external Load Control Valve on valve body instead.
3. multi-way valve according to claim 1, it is characterized in that: described valve rod is O shape valve rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013104014973A CN103449334A (en) | 2013-09-05 | 2013-09-05 | Novel multi-way valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013104014973A CN103449334A (en) | 2013-09-05 | 2013-09-05 | Novel multi-way valve |
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| Publication Number | Publication Date |
|---|---|
| CN103449334A true CN103449334A (en) | 2013-12-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013104014973A Pending CN103449334A (en) | 2013-09-05 | 2013-09-05 | Novel multi-way valve |
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| Country | Link |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104179749A (en) * | 2014-08-19 | 2014-12-03 | 合肥长源液压股份有限公司 | Hydraulic multi-channel valve for agricultural machine |
| CN110606059A (en) * | 2019-09-25 | 2019-12-24 | 蒋保太 | Vehicle rear axle side-shifting device |
| CN111032564A (en) * | 2017-09-13 | 2020-04-17 | 株式会社岛津制作所 | Control valve |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2418473A (en) * | 2004-09-24 | 2006-03-29 | Linde Ag | Hydrostatic braking system using working hydraulic pump of fork lift |
| GB2427663A (en) * | 2005-05-17 | 2007-01-03 | Linde Ag | Work machine with spring loaded brake and prestressed spring device providing idle travel |
| CN201254447Y (en) * | 2008-05-21 | 2009-06-10 | 温跃清 | Forklifts multi-way valve with outlay type inclined lock |
| CN202251178U (en) * | 2011-08-29 | 2012-05-30 | 浙江海宏液压科技股份有限公司 | Energy-saving type forklift multi-way valve |
-
2013
- 2013-09-05 CN CN2013104014973A patent/CN103449334A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2418473A (en) * | 2004-09-24 | 2006-03-29 | Linde Ag | Hydrostatic braking system using working hydraulic pump of fork lift |
| GB2427663A (en) * | 2005-05-17 | 2007-01-03 | Linde Ag | Work machine with spring loaded brake and prestressed spring device providing idle travel |
| CN201254447Y (en) * | 2008-05-21 | 2009-06-10 | 温跃清 | Forklifts multi-way valve with outlay type inclined lock |
| CN202251178U (en) * | 2011-08-29 | 2012-05-30 | 浙江海宏液压科技股份有限公司 | Energy-saving type forklift multi-way valve |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104179749A (en) * | 2014-08-19 | 2014-12-03 | 合肥长源液压股份有限公司 | Hydraulic multi-channel valve for agricultural machine |
| CN111032564A (en) * | 2017-09-13 | 2020-04-17 | 株式会社岛津制作所 | Control valve |
| CN110606059A (en) * | 2019-09-25 | 2019-12-24 | 蒋保太 | Vehicle rear axle side-shifting device |
| CN110606059B (en) * | 2019-09-25 | 2022-12-30 | 蒋保太 | Vehicle rear axle side-shifting device |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20131218 |