CN104179747A - Integral-type multiple-directional reversing valve for forklifts - Google Patents
Integral-type multiple-directional reversing valve for forklifts Download PDFInfo
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- CN104179747A CN104179747A CN201410410166.0A CN201410410166A CN104179747A CN 104179747 A CN104179747 A CN 104179747A CN 201410410166 A CN201410410166 A CN 201410410166A CN 104179747 A CN104179747 A CN 104179747A
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- valve
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- reversing
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Abstract
The invention discloses an integral-type multiple-directional reversing valve for forklifts. The integral-type multiple-directional reversing valve comprises an oil inlet valve plate, multiple reversing valve plates and an oil return valve plate; the reversing valve plates are arranged between the oil inlet valve plate and the oil return valve plate; the oil inlet valve plate, the reversing valve plates and the oil return valve plate are of an integral structure; an oil inlet P is arranged in the oil inlet valve plate, an oil return joint is arranged on the oil return valve plate, and an oil return port T is arranged in the oil return joint; each of the reversing valve plates is provided one or two working oil ports; each of the reversing valve plates is inserted with a valve stem, and one end of each valve stem extends out of the corresponding reversing valve plate. The integral-type multiple-directional reversing valve has the advantages that risk of oil leakage can be lowered, operational reliability of the valve can be improved, convenience in maintenance is achieved, machining technique is simplified, machining cost is lowered, and the like.
Description
Technical field
The present invention relates to a kind of multi-way valve, especially a kind of integral multi-way reversing valve for fork truck.
Background technique
Multiple directional control valve is widely used in the machinery such as fork truck, is mainly used for meeting the unidirectional locking of actuator.This multi-way valve is integrated in Pilot operated check valve in working body, compact structure, and operating life is high, has reduced the layout of hydraulic system pipeline simultaneously.
At present, existing multiple directional control valve, adopts split-type structural more.As the outline drawing of Fig. 5 multiple directional control valve that is prior art.As Fig. 5 can find out, this existing multiple directional control valve partly consists of oil-feed valve block 1, a plurality of Reversing valve plate 2 and oil return valve block 3 etc., between two adjacent valve blocks, adopt sealing gasket 4 between sheet to seal, sealing gasket between needing a plurality of, therefore between sheet, the risk of leakage of oil is larger, and the functional reliability of multi-way valve is poor.Mode with bolts between valve block, is fastened as a whole described oil-feed valve block 1, a plurality of Reversing valve plate 2 and oil return valve block 3 by three clamping bolts 5, exists Sealing to damage or bolt connects the problem of becoming flexible, cause leakage of oil between each minute body component.The multi-way valve of this split-type structural, need be first by Split assembled, and then adds auxiliary hole; Because valve body is when urgent, valve main aperture has micro-distortion, causes valve rod when dress examination, to occur catching phenomenon; So need to become after integral body at separable assembled, need to revise the size of main aperture to guarantee the flexibility of stem movement, processing technology is comparatively complicated.
If Fig. 6 is the C-C sectional view of the oil-feed valve block of existing multiple directional control valve in Fig. 5, can find out the internal structure of oil-feed valve block.As shown in Figure 6, in oil-feed valve block, be provided with a straight moving shunting safety valve 26; This directly moves shunting safety valve 26 is also split type valve, and straight moving shunting safety valve 26 comprises safety valve spring 15, safety valve spool 14, valve base of safety valve 13 and cover plate 17; Described safety valve spring 15, safety valve spool 14, valve base of safety valve 13 are arranged in the valve pocket of oil-feed valve block.During assembling, the safety valve spring 15, safety valve spool 14, the valve base of safety valve 13 that directly move shunting safety valve need to be installed in the valve pocket of oil-feed valve block 1, then cover cover plate 17 and tighten with screw 19.This need to be opened cover plate 17 when directly moving shunting safety valve needs repairing, and takes out safety valve spring 15, safety valve spool 14, valve base of safety valve 13 and keeps in repair, and it is very inconvenient to keep in repair.Particularly valve base of safety valve 13, are directly inserted in valve pocket, and coordinate closely between valve base of safety valve 13 and valve pocket, need to put forth effort valve base of safety valve 13 could be extracted; And on this valve base of safety valve 13, there is no Point of Strength, and very hard while extracting valve base of safety valve 13, cause maintenance to be wasted time and energy, very inconvenient.
Summary of the invention
The present invention is the deficiency existing in above-mentioned prior art for avoiding, and a kind of integral multi-way reversing valve for fork truck is provided, to reduce the risk of leakage of oil, the functional reliability of raising valve.
The present invention be technical solution problem by the following technical solutions.
For an integral multi-way reversing valve for fork truck, its structural feature is to comprise an oil-feed valve block, a plurality of Reversing valve plate and an oil return valve block; Described a plurality of Reversing valve plate is arranged between described oil-feed valve block and described oil return valve block; Described oil-feed valve block, a plurality of Reversing valve plate and oil return valve block are monolithic construction; On described oil-feed valve block, be provided with oil inlet P, on described oil return valve block, be provided with a back leakage connection, on described back leakage connection, be provided with an oil return inlet T;
On each Reversing valve plate of described a plurality of Reversing valve plates, be provided with one or two actuator port; Within each Reversing valve plate of described a plurality of Reversing valve plates, be inserted with a valve rod, one end of described valve rod stretches out in outside described Reversing valve plate.
The structural feature of a kind of integral multi-way reversing valve for fork truck of the present invention is also:
The left end of described oil-feed valve block is provided with safe valve pocket, is provided with a differential shunting safety valve of plug-in type in described safe valve pocket; The differential shunting safety valve of described plug-in type is Integral valve, is directly plugged in described safe valve pocket;
The differential shunting safety valve of described plug-in type comprises emergency valve seat, safe spool, safety valve spring, safe valve pocket, cover plate, nut and screw; Described emergency valve seat is positioned at the right-hand member of the differential shunting safety valve of plug-in type, and described safe spool is arranged in the inner chamber of described emergency valve seat; Described safe valve pocket fixed cover is located on the outer circumferential face of left part of described emergency valve seat; The right-hand member of described safety valve spring is inserted in the groove of described safe spool left end setting, and connects with the bottom land of described groove; On the inner peripheral surface of the left part of described safe valve pocket and outer circumferential face, be respectively arranged with internal thread and outside thread; The mode that described cover plate is threaded connection is sheathed on the outer circumferential face of left part of described safe valve pocket, makes to be fixedly connected between described cover plate and described safe valve pocket;
Described nut is arranged on the left side of described cover plate, and the mode that described screw is threaded connection is successively inserted in described nut and described cover plate, and the right side of described screw and the left end of described safety valve spring connect.
Compared with the prior art, beneficial effect of the present invention is embodied in:
A kind of integral multi-way reversing valve for fork truck of the present invention, has following technological merit.
(1) oil-feed valve block, Reversing valve plate and oil return valve block are set to monolithic construction, and global formation has reduced the risk of leakage of oil between sheet, has improved the functional reliability of multi-way valve.
(2) without punching, save clamping bolt on valve block, simplified processing technology, shortened the manufacture cycle.
(3) the assembly type safety valve of prior art is made into the differential shunting safety valve of plug-in type of integral type.When the differential shunting safety valve of plug-in type breaks down, only need the differential shunting safety valve of this plug-in type to extract and can keep in repair in safe valve pocket.The differential shunting safety valve of this plug-in type has and plugs feature easily, makes the maintenance maintenance of the differential shunting safety valve of plug-in type convenient and swift.
A kind of integral multi-way reversing valve for fork truck of the present invention, has the risk that can reduce leakage of oil, the functional reliability that improves valve, maintenance and repair are convenient, simplified processing technology, reduced the advantages such as processing cost.
Accompanying drawing explanation
Fig. 1 is the plan view of a kind of integral multi-way reversing valve for fork truck of the present invention.
Fig. 2 is the A-A sectional view (sectional view of oil-feed valve block of the present invention) in Fig. 1.
Fig. 3 is the structural drawing of the differential shunting safety valve of the plug-in type in Fig. 2.
Fig. 4 is the B-B sectional view (sectional view of Reversing valve plate of the present invention) in Fig. 1.
Fig. 5 is the plan view of the Split multi-way valve of prior art.
Fig. 6 is the C-C sectional view (sectional view of the oil-feed valve block of prior art) in Fig. 5.
Label in accompanying drawing 1～accompanying drawing 6: 1 oil-feed valve block, 2 Reversing valve plates, 3 oil return valve blocks, sealing gasket between 4,5 clamping bolts, 6 oil inlet P, 7 actuator ports, 8 oil return inlet T, 9 valve rods, 10 back leakage connections, 11 safe valve pockets, the differential shunting safety valve of 12 plug-in type, 13 emergency valve seats, 14 safe spools, 15 safety valve springs, 16 safe valve pockets, 17 cover plates, 18 nuts, 19 screws, 20 one-way valves, 21 one-way valve seats, 22 nonreturn valve cores, 23 check valve springs, 24 outside framework oil seals, 26 straight moving shunting safety valves.
Below pass through embodiment, and the invention will be further described by reference to the accompanying drawings.
Embodiment
Referring to accompanying drawing 1～accompanying drawing 4, a kind of integral multi-way reversing valve for fork truck of the present invention, comprises an oil-feed valve block 1, a plurality of Reversing valve plate 2 and an oil return valve block 3; Described a plurality of Reversing valve plate 2 is arranged between described oil-feed valve block 1 and described oil return valve block 3; Described oil-feed valve block 1, a plurality of Reversing valve plate 2 and oil return valve block 3 are monolithic construction; On described oil-feed valve block 1, be provided with oil inlet P 6, on described oil return valve block 3, be provided with a back leakage connection 10, on described back leakage connection 10, be provided with an oil return inlet T 8;
On each Reversing valve plate 2 of described a plurality of Reversing valve plate 2, be provided with one or two actuator port 7; Within each Reversing valve plate 2 of described a plurality of Reversing valve plate 2, be inserted with a valve rod 9, one end of described valve rod 9 stretches out in outside described Reversing valve plate 2.
As Fig. 1, this multi-way valve is set to monolithic construction, and oil-feed valve block, a plurality of Reversing valve plate and oil return valve block have been made an integral body.Do not need to combine one by one, do not need bolton yet, between valve block also without sealing gasket between sheet is set in addition.Compare with existing Split multi-way valve, there is the following aspects: (1) has saved sealing gasket between sheet, has saved material, avoided sealing between sheet tightly not cause the problem of leakage of oil simultaneously, improved the functional reliability of multi-way valve; (2) without punching, save clamping bolt on valve block, simplified processing technology, shortened the manufacture cycle.
Integral multitandem valve of the present invention, is integrated type product, by a plurality of valve block global formations, reduces the risk of leakage of oil between sheet.In technique, reduce whole fraising technique simultaneously, greatly shortened the manufacture cycle.)
The left end of described oil-feed valve block 1 is provided with safe valve pocket 11, is provided with a differential shunting safety valve 12 of plug-in type in described safe valve pocket 11; The differential shunting safety valve 12 of described plug-in type is Integral valve, is directly plugged in described safe valve pocket 11;
The differential shunting safety valve 12 of described plug-in type comprises emergency valve seat 13, safe spool 14, safety valve spring 15, safe valve pocket 16, cover plate 17, nut 18 and screw 19; Described emergency valve seat 13 is positioned at the right-hand member of the differential shunting safety valve 12 of plug-in type, and described safe spool 14 is arranged in the inner chamber of described emergency valve seat 13; Described safe valve pocket 16 fixed covers are located on the outer circumferential face of left part of described emergency valve seat 13; The right-hand member of described safety valve spring 15 is inserted in the groove of described safe spool 14 left ends settings, and connects with the bottom land of described groove; On the inner peripheral surface of the left part of described safe valve pocket 16 and outer circumferential face, be respectively arranged with internal thread and outside thread; The mode that described cover plate 17 is threaded connection is sheathed on the outer circumferential face of left part of described safe valve pocket 16, makes to be fixedly connected between described cover plate 17 and described safe valve pocket 16;
Described nut 18 is arranged on the left side of described cover plate 17, and the mode that described screw 19 is threaded connection is successively inserted in described nut 18 and described cover plate 17, and the left end of the right side of described screw 19 and described safety valve spring 15 connects.
As Fig. 2 and 3, the screw of the differential shunting safety valve 12 of described plug-in type is socket head screw.In the side that described nut and described cover plate connect, be provided with seal groove, in described seal groove, be provided with seal ring.Safe valve pocket and emergency valve seat are fixedly connected, and described cover plate, nut and screw are all fixed on the left end of described safe valve pocket, and therefore making the differential shunting safety valve of this plug-in type is integral type structure.During use, only need to insert in safe valve pocket and can use, during insertion, safe valve pocket and emergency valve seat are positioned at safe valve pocket, and cover plate, nut and screw are all positioned at outside oil-feed valve block.When the differential shunting safety valve of plug-in type breaks down, only need the differential shunting safety valve of this plug-in type to extract and can keep in repair in safe valve pocket.The cover plate of the differential shunting safety valve of plug-in type, nut etc. are all positioned at outside oil-feed valve block, while therefore extracting the differential shunting safety valve of plug-in type, there is good Point of Strength, therefore the differential shunting safety valve of this plug-in type has and plugs feature easily, thereby also makes the maintenance maintenance of the differential shunting safety valve of plug-in type convenient and swift.
As Fig. 4, on described Reversing valve plate 2, be provided with a unidirectional valve pocket, the outlet of described unidirectional valve pocket is positioned at a side at actuator port 7 places of described Reversing valve plate 2; On the inner peripheral surface of described unidirectional valve pocket, be provided with internal thread; In described unidirectional valve pocket, be provided with an one-way valve 20; Described one-way valve 20 comprises one-way valve seat 21, nonreturn valve core 22 and check valve spring 23; Described nonreturn valve core 22 is inserted in described unidirectional valve pocket, the lower end of described one-way valve seat 21 is provided with outside thread, and between the outside thread of described one-way valve seat 21 and the internal thread of described unidirectional valve pocket, screw-thread fit is fixed in described unidirectional valve pocket one-way valve seat 21; The lower end of described one-way valve seat 21 is provided with the upwards upper groove of depression, and described nonreturn valve core 22 tops are inserted in the groove of described one-way valve seat 21 lower ends, and the top of described nonreturn valve core 22 is also provided with the low groove to lower recess; Described check valve spring 23 lower ends are inserted in described low groove and connect with the bottom land of low groove, and the bottom land of the upper groove of the top of described check valve spring 23 and described one-way valve seat 21 connects.In described Reversing valve plate 2 and the cooperation place of valve rod 9, adopt outside framework oil seal 24 as Sealing.
As Figures 1 and 4, described unidirectional valve pocket and described actuator port are positioned at the same side.One-way valve is arranged on the position between valve block unlike existing multi-way valve, and is arranged on actuator port place one side of Reversing valve plate, so one-way valve takes out and installation is all more convenient, is also convenient to maintenance and the maintenance of one-way valve.When needing repairing, only one-way valve seat need to be screwed out from unidirectional valve pocket.And the structure of this set one-way valve, is optimized the front and back runner of one-way valve, make fluid push one-way valve open from one-way valve front end and directly enter work runner, there is no repeatedly bend, thus the fluid pressure loss while greatly having reduced through one-way valve.As can be seen from Figure 4, unidirectional valve pocket both sides all have an oil duct to be connected with the cavity at valve rod place, and two actuator ports work oil duct by separately is directly connected with the cavity at valve rod place, so unidirectional valve pocket of the present invention, compare with the unidirectional valve pocket of prior art, with work runner is directly connected more simple direct, the fluid pressure loss while greatly having reduced to pass through one-way valve.
A kind of integral multi-way reversing valve for fork truck of the present invention, is mainly used in fork truck.The main relief valve of this multiple directional control valve all adopts integral plugged formula safety valve with shunting relief valve, and (main relief valve is Pilot operated safety valve, shunting relief valve is differential type safety valve), actuator port one-way valve is outside to be installed, and makes relief valve and one-way valve when breaking down, be very easy to maintenance and change.Valve inner cavity is optimized, and makes to reduce through the pressure loss of one-way valve.
More than show and described basic principle of the present invention, major character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what in above-described embodiment and specification, describe is principle of the present invention; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements all fall in claimed scope of the present invention.The protection domain that the present invention requires is defined by appending claims and equivalent thereof.
Claims (2)
1. for an integral multi-way reversing valve for fork truck, it is characterized in that, comprise an oil-feed valve block (1), a plurality of Reversing valve plate (2) and an oil return valve block (3); Described a plurality of Reversing valve plate (2) is arranged between described oil-feed valve block (1) and described oil return valve block (3); Described oil-feed valve block (1), a plurality of Reversing valve plate (2) and oil return valve block (3) are monolithic construction; On described oil-feed valve block (1), be provided with oil inlet P (6), on described oil return valve block (3), be provided with a back leakage connection (10), on described back leakage connection (10), be provided with an oil return inlet T (8).
On each Reversing valve plate (2) of described a plurality of Reversing valve plate (2), be provided with one or two actuator port (7); Within each Reversing valve plate (2) of described a plurality of Reversing valve plate (2), be inserted with a valve rod (9), one end of described valve rod (9) stretches out in outside described Reversing valve plate (2).
2. a kind of integral multi-way reversing valve for fork truck according to claim 1, it is characterized in that, the described left end that enters valve block (1) is provided with safe valve pocket (11), is provided with a differential shunting safety valve of plug-in type (12) in described safe valve pocket (11); The differential shunting safety valve of described plug-in type (12) is Integral valve, is directly plugged in described safe valve pocket (11);
The differential shunting safety valve of described plug-in type (12) comprises emergency valve seat (13), safe spool (14), safety valve spring (15), safe valve pocket (16), cover plate (17), nut (18) and screw (19); Described emergency valve seat (13) is positioned at the right-hand member of the differential shunting safety valve of plug-in type (12), and described safe spool (14) is arranged in the inner chamber of described emergency valve seat (13); Described safe valve pocket (16) fixed cover is located on the outer circumferential face of left part of described emergency valve seat (13); The right-hand member of described safety valve spring (15) is inserted in the groove of described safe spool (14) left end setting, and connects with the bottom land of described groove; On the inner peripheral surface of the left part of described safe valve pocket (16) and outer circumferential face, be respectively arranged with internal thread and outside thread; The mode that described cover plate (17) is threaded connection is sheathed on the outer circumferential face of left part of described safe valve pocket (16), makes to be fixedly connected between described cover plate (17) and described safe valve pocket (16).
Described locking nut (18) is arranged on the left side of described cover clamp (17), the mode that described screw (19) is threaded connection is successively inserted in described nut (18) and described cover plate (17), and the left end of the right side of described screw (19) and described safety valve spring (15) connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410410166.0A CN104179747A (en) | 2014-08-19 | 2014-08-19 | Integral-type multiple-directional reversing valve for forklifts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410410166.0A CN104179747A (en) | 2014-08-19 | 2014-08-19 | Integral-type multiple-directional reversing valve for forklifts |
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| CN104179747A true CN104179747A (en) | 2014-12-03 |
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| CN201410410166.0A Pending CN104179747A (en) | 2014-08-19 | 2014-08-19 | Integral-type multiple-directional reversing valve for forklifts |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106122537A (en) * | 2016-08-31 | 2016-11-16 | 南京晨光集团有限责任公司 | Encapsulating method between a kind of chip multiple directional control valve valve block |
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Application publication date: 20141203 |