CN105864137A - Integral type priority multiway valve - Google Patents
Integral type priority multiway valve Download PDFInfo
- Publication number
- CN105864137A CN105864137A CN201610446518.7A CN201610446518A CN105864137A CN 105864137 A CN105864137 A CN 105864137A CN 201610446518 A CN201610446518 A CN 201610446518A CN 105864137 A CN105864137 A CN 105864137A
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- Prior art keywords
- valve
- preferential
- control valves
- direction control
- banked direction
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Classifications
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- 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
- F15B13/021—Valves for interconnecting the fluid chambers of an actuator
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Check Valves (AREA)
Abstract
The invention discloses an integral type priority multiway valve. The integral type priority multiway valve comprises a priority valve unit and a plurality of reversing valve units, wherein valve bodies of the priority valve unit and the plurality of reversing valve units are integral type components; the top parts, corresponding to the reversing valve units, of the valve bodies are provided with seat holes; check valves of the reversing valve units are inserted in the seat holes of the valve bodies. According to the integral type priority multiway valve, the valve bodies of the priority valve and the plurality of reversing valves are arranged into integral type structures, so that the design improvement space is enlarged, the flow areas of ring-shaped runners can be enlarged, the flow areas of parallel-connected inlet oil ducts can be enlarged, the flow capacity of the reversing valves can be improved, and then the effect of reducing the pressure loss is achieved.
Description
Technical field
The present invention relates to a kind of preferential banked direction control valves, be used for industrial transport instrument, such as fork truck.
Background technology
Preferential banked direction control valves, also referred to as priority load sensing banked direction control valves, is used widely on fork truck, by pressure-gradient control valve and
Being applied in combination of banked direction control valves, can be greatly decreased oil return energy loss.
The typical structure of existing preferential banked direction control valves (double reversal valve) discloses in Chinese patent literature CN00106155, as
Shown in Fig. 1, preferential banked direction control valves 100 ' includes preferably shunting valve block 102 ' and multiple this preferential flow divider valve sheet 102 ' downstream that is positioned at
Two Reversing valve plates 103 '.
Wherein, P ' mouth accepts high pressure liquid force feed, and high pressure liquid force feed is divided in PF ' mouth spray by preferential flow divider valve sheet 102 '
Main flow and its residual current, main flow is used for controlling work, and residual current is by guiding entering of the reversal valve installed to each Reversing valve plate 103 '
Mouthful.By the manually operated each Reversing valve plate 103 ' of operation bar, the such as operation such as tilt cylinder, lift cylinder can be driven by above-mentioned residual current
Mechanism.
About the effect of preferential banked direction control valves (three reversal valves) and the introduction of operation principle referring also to Chinese patent literature
CN201288852Y、CN1094981C。
The raising required along with fork truck design, the energy-saving and emission-reduction design to hydraulic unit it is also proposed requirements at the higher level, next
The preferential banked direction control valves in generation requires that energy consumption reduces as far as possible in the case of can replacing original preferential banked direction control valves.
Summary of the invention
It is an object of the invention to provide a kind of preferential banked direction control valves of monoblock type, so that the preferential multichannel of original chip can be substituted
Valve, and reduce energy loss.
To this end, the invention provides a kind of preferential banked direction control valves of monoblock type, including pressure-gradient control valve unit and multiple valve unit,
The valve body of described pressure-gradient control valve unit and the plurality of valve unit is integral type component, described valve body corresponding to each reversal valve
The top of unit is provided with bore, and the check valve of each valve unit is plugged in the bore of described valve body.
Further, above-mentioned one-piece member is foundry goods.
Further, above-mentioned valve body have by ring shaped oil passage around arch entity portion, be provided with in described arch entity portion
Oil inlet passage in parallel, wherein, the cross section of described ring shaped oil passage is rectangular, and the width of described ring shaped oil passage is 5-6mm, the degree of depth is
24-28mm。
Further, the inner channel wall of above-mentioned ring shaped oil passage and outer passage wall are curved surfaces, described inner side
The curved surfaces of conduit wall is communicated with the valve port of described oil inlet passage in parallel, and the latus rectum of described valve port is 12mm-13mm.
Further, the shape of cross section of above-mentioned oil inlet passage in parallel is circular arch shape.
Further, above-mentioned valve body includes being positioned at described valve body end face and being positioned at the first hydraulic fluid port of described check valve both sides
The the first connection chamber connected with described first hydraulic fluid port with the second hydraulic fluid port and the second connection chamber connected with described second hydraulic fluid port,
Wherein, described first connection chamber connects chamber and is respectively provided with the arc that the outer passage wall with described ring shaped oil passage be arranged in parallel with second
Shape cavity wall.
Further, above-mentioned check valve includes: valve seat, in tubular, has center guide hole, an end seal of described center guide hole
Close, the other end forms spring cavity；Spool, including the guide post being placed in the guide hole of described center and be positioned at described guide post end
Valve head；And spring, be set on described guide post, one end of described spring is positioned at described spring cavity, the other end with
Valve head abuts, and wherein, described valve head is positioned in described ring shaped oil passage with being positioned at retractable, opens and closes with described valve port and coordinates.
Further, the top of the valve seat of above-mentioned check valve is bolt head, covers in described bore in lid.
Further, the spool latus rectum of above-mentioned valve unit is 15mm-16mm.
Further, above-mentioned valve body include being positioned at the axial two ends of spool of each described valve unit the first back oil road and
Second back oil road, described first back oil road and the second back oil road cross to oil return opening on the right side wall of valve body.
The valve body of preferential valve block and multiple Reversing valve plate is made of one formula structure by the present invention, increases design and improves sky
Between, and then the circulation area (mainly strengthening on throttle slice thickness direction) of annular channel, the circulation of import oil duct in parallel can be strengthened
Area and the through-current capability of check valve, reduce the effect of crushing.
In addition to objects, features and advantages described above, the present invention also has other objects, features and advantages.
Below with reference to figure, the present invention is further detailed explanation.
Accompanying drawing explanation
The Figure of description of the part constituting the application is used for providing a further understanding of the present invention, and the present invention shows
Meaning property embodiment and explanation thereof are used for explaining the present invention, are not intended that inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram of the preferential banked direction control valves of prior art；
Fig. 2 is the three-dimensional view of the preferential banked direction control valves of monoblock type according to an embodiment of the invention；
Fig. 3 is the schematic diagram from end face viewing of the preferential banked direction control valves of monoblock type according to an embodiment of the invention；
Fig. 4 is the cross sectional representation of the valve unit of the preferential banked direction control valves of monoblock type according to an embodiment of the invention；
Fig. 5 is the A-A profile of valve unit shown in Fig. 4；
Fig. 6 a is the Longitudinal cross section schematic of the preferential banked direction control valves of monoblock type according to an embodiment of the invention；
Fig. 6 b is the local A enlarged diagram of the preferential banked direction control valves of monoblock type according to an embodiment of the invention；
Fig. 7 is the horizontal steps sectional view of the preferential banked direction control valves of the monoblock type shown in Fig. 6 a；
Fig. 8 is the C-C sectional view of the preferential banked direction control valves of the monoblock type shown in Fig. 7；
Fig. 9 is the oil pressure line map of the preferential banked direction control valves of monoblock type according to an embodiment of the invention；
Figure 10 is the viewgraph of cross-section of the Reversing valve plate of the preferential banked direction control valves of chip of comparative example；
Figure 11 is the assembling structural representation of the check valve of Reversing valve plate shown in Figure 10；And
Figure 12 is the D-D profile of Reversing valve plate shown in Figure 10.
Description of reference numerals
100, the preferential banked direction control valves of monoblock type；110, pressure-gradient control valve unit；
120, valve unit；130, valve body；
140, check valve；121, reversing valve core；
131, arch entity portion；132, ring shaped oil passage；
133, oil inlet passage in parallel；134, bore；
135, actuator port；136, working oil chamber；
138, plug；139, back oil road；
141, valve seat；142, spool；
143, spring；144, seal washer；
1411, center guide hole；1412, spring cavity；
1413, bolt head；1421, guide post；
1422, valve head；1321, inner channel wall；
1322, outer passage wall；1361, arc cavity wall.
Detailed description of the invention
It should be noted that in the case of not conflicting, the embodiment in the application and the feature in embodiment can phases
Combination mutually.Describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
Figure 10 to Figure 12 shows the structure of the Reversing valve plate of the preferential banked direction control valves of comparative example, in conjunction with reference to Figure 10 extremely
Figure 12, Reversing valve plate 200 ' is provided with three bolts hole 201 ' of triangular arrangement, to utilize bolt by multiple independent valve block strings
Be connected together, check valve 202 ' be perpendicular to the cross section of Reversing valve plate 200 ' according to its axis and layout at valve body 202 ' by ring
The arch entity portion 204 ' that shape oil duct 203 ' is limited to, oil inlet passage 205 ' in parallel also is disposed in this arch entity portion 204 ',
Its cross section is triangular in shape.
In the research process reducing preferential banked direction control valves energy consumption, the inventors discovered that, the crushing change of preferential banked direction control valves is right
The through-current capability of annular channel, the through-current capability of import oil duct in parallel, check valve the change of through-current capability sensitive, other are wanted
Element changes insensitive.In Figure 10 to the Reversing valve plate shown in 12, the cross-sectional structure of Reversing valve plate designs the most closely,
In the case of keeping and the most preferentially banked direction control valves is interchangeable, the design space improving through-current capability is the least.
The valve body of preferential valve block and multiple Reversing valve plate is made of one formula structure by the present invention, increases design and improves sky
Between, so strengthen the flow area (particularly larger on throttle slice thickness direction) of annular channel, import oil duct in parallel logical
Flow area and the through-current capability of reversal valve, and then reduce the purpose of crushing.
Fig. 2 to Fig. 8 shows some embodiments of the preferential banked direction control valves of the monoblock type according to the present invention.
As Fig. 2 is to shown in 9, and the preferential banked direction control valves of monoblock type 100, including pressure-gradient control valve unit 110 and two valve units
120, each valve unit 120 has the arch entity portion 131 limited to by ring shaped oil passage 132, is provided with in arch entity portion 131
Oil inlet passage 133 in parallel, the valve body 130 of pressure-gradient control valve unit 110 and multiple valve unit 120 is integral type component, valve body 130
The top corresponding to each valve unit 120 be provided with bore 134, each valve unit 120 for loading the unidirectional of holding
Valve 140 is plugged in the bore 134 of valve body 130.
According to the integral multitandem valve of the present invention, valve body is integral type component so that ring shaped oil passage is in throttle slice thickness direction
On can strengthen, check valve can be arranged on body top so that sectional area within circular arch shape entity strengthens, oil inlet passage in parallel
Flow area strengthen, check valve the through-flow diameter of the valve port controlled also can increase accordingly, so that sensitive to crushing
The flow area of each portion or structure increases, runner entirety through-current capability strengthens, and crushing reduces.
The valve body 130 of the present invention uses one-piece member, wears fixing between valve block without bolt, with prior art phase
Ratio, eliminates at least three concatenation bolts and the processing of valve block bolt hole, and also without leakage of oil between sheet between valve block.
In one embodiment, one-piece member is foundry goods.In the present embodiment, with the Reversing valve plate shown in Figure 10 to Figure 11
Check valve 202 ' compare, instant invention overcomes the problem that the movement travel of check valve is affected by throttle slice thickness, check valve dynamic
Make stroke to strengthen so that through-current capability strengthens, and the flow area of oil inlet passage in parallel the most substantially strengthens, and Reversing valve plate
Other interior part-structures also have substantially simplification with rationally, thus reduce casting technique difficulty so that valve body is suitable for monoblock type
Casting.
In the present embodiment, internal galleries and the chamber of preferential banked direction control valves may utilize existing casting and combine process for machining
Realize.
In one embodiment, check valve 140 is coordinated by screw-threaded coupling with bore 304, and is provided with seal washer 305,
To realize fastening installation and to seal.
In one embodiment, as shown in figures 6 a and 6b, check valve 140 includes: valve seat 141, in tubular, has center and leads
Hole 1411, one end closing of center guide hole 1411, the other end is uncovered, and opening end forms spring cavity 1412；Spool 142, including
The guide post 1421 being placed in the guide hole of center and the valve head 1422 being positioned at guide post 1421 end；And spring 143, it is set in and leads
On bar 1421, one end of spring 143 is positioned at spring cavity 1412, and the other end abuts with valve head 1422, wherein, and valve head 1422
It is positioned at the ring shaped oil passage 132 of valve body 130, opens and closes with the valve port of oil inlet passage 133 in parallel and coordinate.
In the present embodiment, the external diameter of valve head 1422 is more than the external diameter of guide post 1421, such as taper or spherical crown shape, spool
142 are guided by the center guide hole 1411 of valve seat, have stroke long enough, and through-current capability is strong, and spool 142 motion is flat
Surely, noise is low.
In the present embodiment, the top of the valve seat 141 of check valve 140 is provided with bolt head 1413, in lid, is arranged on bore
On, plug-in mounting is convenient, and the installation of check valve puts in place the clearest and the most definite.
In one embodiment, as shown in Figure 4, inner channel wall 1321 and the outer passage wall 1322 of ring shaped oil passage 132 is protected
Holding as cambered surface, in the present embodiment, the width of ring shaped oil passage and the degree of depth allow valve head to move freely interior, by interior outer passage wall
It is designed as cambered surface, contributes to improving the performance in terms of casting stress distribution, compared with the straight wall of ring shaped oil passage top side, foundry goods
Stress distribution is evenly.
In one embodiment, as shown in Figure 4 with shown in Fig. 6 b, the cross section of ring shaped oil passage 132 is rectangular.Ring shaped oil passage
The rational width W of 132 is 5mm-7mm, such as 5.5mm, 6mm, 6.5mm, and the width of ring shaped oil passage reduces width more than crushing during 7mm
Spending faint, the reasonable depth T of ring shaped oil passage 132 is 24mm-28mm, such as 25mm；26mm；27mm, the degree of depth of ring shaped oil passage is big
When 28mm, crushing reduction amplitude is faint.In the Reversing valve plate shown in Figure 10 to Figure 12, the width of ring shaped oil passage is 4.8mm,
Rational degree of depth T of ring shaped oil passage ' it is 22mm, it is seen that and in the present embodiment, the width of ring shaped oil passage and the degree of depth have and significantly add
Greatly, correspondingly, crushing reduction amplitude is obvious.
In one embodiment, as shown in Figure 6 b, the latus rectum D of the valve port connected with oil inlet passage in parallel is 12mm-13mm, example
Such as 12.5mm.In the Reversing valve plate shown in Figure 10 to Figure 12, the latus rectum of valve port is 11mm.Visible in the present embodiment, valve port
Latus rectum have significantly increase, the diameter of valve head is preferably no more than 13.5mm, so that keeping valve head movable in ring shaped oil passage
Time have enough spatial margin.
In one embodiment, as it is shown in figure 5, the latus rectum of reversing valve core 121 can be adjusted to 14mm-16mm, such as 15mm.?
In Reversing valve plate shown in Figure 10 to Figure 12, the reasonable latus rectum of reversing valve core is 13mm, in the present embodiment, and the degree of depth of ring shaped oil passage
Strengthen, it is allowed to the latus rectum of reversing valve core significantly increases, and then reserved certain flow enhancement space.
In one embodiment, as shown in Figure 4 and Figure 6, the shape of cross section of oil inlet passage 133 in parallel is circular arch shape, circular arch
Arcwall face 1331 one side of the shape curved surfaces to inner channel wall 1321.
In the present embodiment, both having met the requirement that the circulation area of oil inlet passage in parallel increases, improving again foundry goods should
Performance in terms of power distribution, compared with the oil inlet passage in parallel of the triangular-section shown in Figure 10, flow area substantially strengthens, valve
Concentrate without obvious stress near Kou.In the present invention, the shape of oil inlet passage in parallel is also referred to as semilune.
In one embodiment, as shown in Figure 4, valve unit 120 is additionally included in the end face of valve body to be positioned at check valve 140 left
Two actuator ports 135 of right both sides, wherein, two actuator ports 135 are connected with two working oil chambers 136 correspondingly,
Two working oil chambers 136 are respectively provided with the arc cavity wall 1361 that the outer passage wall 1322 with ring shaped oil passage 132 be arranged in parallel.
In the present embodiment, two working oil chambers are distributed in the left and right sides in arch entity portion, and symmetrical configuration, near excellent
In one valve unit 120 of first valve cell, the actuator port (B1) in left side blocks with plug 138, the actuator port on right side
A1 is to forklift lifting oil cylinder fuel feeding.Away from another valve unit of pressure-gradient control valve unit, the actuator port (B2) in left side
With the actuator port (A2) on right side to the oscillating oil cylinder fuel feeding of fork truck.The arc cavity wall 1361 of two oil pockets 136 makes foundry goods exist
At this, stress distribution is uniform, reduces the probability of happening of casting flaw.
In one embodiment, in conjunction with reference to Fig. 4 and Fig. 7, the position corresponding to valve unit of valve body 130 includes being positioned at
Two back oil roads 139 (the i.e. first back oil road and the second back oil road) at the axial two ends of reversing valve core 121, wherein, the first reversal valve
Unit and the first back oil road of the second valve unit and the second back oil road connect on the right side wall of valve body.Shown in Fig. 9
In Reversing valve plate, the first chamber, limit connects in the bottom of valve block with the second chamber, limit, in the present embodiment, connects on right side wall, returns
Oil duct layout changes so that the casting difficulty of foundry goods reduces, it is only necessary to an oil return inlet T 1.And in the prior art shown in Fig. 1
In also need to oil return inlet T 2 '.
Operationally, as shown in Figure 8 and Figure 9, hydraulic oil enters in valve from P mouth the preferential banked direction control valves of monoblock type, preferential to turning
To mouth CF mouth；When steering gear does not works, the LS mouth on valve is directly from the internal oil return of steering gear so that non-spring side is produced with spring side
Raw pressure reduction, pushes open priority spool, and system cause is to work system；When steering gear turns to, by the operating of steering gear by LS mouth
Closing, make the load connection of LS mouth and steering gear, LS mouth obtains the feedback pressure of steering gear, thus ensures that system carrys out oily preferential guarantor
Card turns to required flow.
In the case of the hydraulic fluid port size and location keeping original preferential banked direction control valves is constant, the preferred embodiment of the present invention whole
The preferential banked direction control valves of body formula and the preferential banked direction control valves (multi-disc superposes) of comparative example the two test effect contrast as follows:
By above-mentioned contrast test, monoblock type preferential banked direction control valves outstanding feature is: position in the case of on year-on-year basis
The pressure loss reduces 7%-19%, and the commutation pressure loss reduces 7%-26%, reduces heat loss for system, saved energy.Its
In, test(ing) medium is 46# antiwear hydraulic oil, and internal leakage records at 50 ± 5 DEG C.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, that is made any repaiies
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (10)
1. the preferential banked direction control valves of monoblock type, including pressure-gradient control valve unit and multiple valve unit, it is characterised in that described preferentially
The valve body of valve cell and the plurality of valve unit is integral type component, the top corresponding to each valve unit of described valve body
Portion is provided with bore, and the check valve of each valve unit is plugged in the bore of described valve body.
The preferential banked direction control valves of monoblock type the most according to claim 1, it is characterised in that described one-piece member is foundry goods.
The preferential banked direction control valves of monoblock type the most according to claim 1, it is characterised in that described valve body has and enclosed by ring shaped oil passage
Around arch entity portion, be provided with oil inlet passage in parallel in described arch entity portion, wherein, the cross section of described ring shaped oil passage is square
Shape, the width of described ring shaped oil passage is 5mm-6mm, the degree of depth is 24mm-28mm.
The preferential banked direction control valves of monoblock type the most according to claim 3, it is characterised in that the inner channel wall of described ring shaped oil passage
Being curved surfaces with outer passage wall, the curved surfaces of described inner channel wall is communicated with described oil inlet passage in parallel
Valve port, the latus rectum of described valve port is 12mm-13mm.
The preferential banked direction control valves of monoblock type the most according to claim 3, it is characterised in that the cross section of described oil inlet passage in parallel
It is shaped as circular arch shape.
The preferential banked direction control valves of monoblock type the most according to claim 3, it is characterised in that described valve body includes being positioned at described valve body
End face and be positioned at the first actuator port of described check valve both sides and the second actuator port and described first actuator port even
The first logical working oil chamber and the second working oil chamber connected with described second actuator port, wherein, described first working oil
Chamber and the second working oil chamber are respectively provided with the arc cavity wall that the outer passage wall with described ring shaped oil passage be arranged in parallel.
The preferential banked direction control valves of monoblock type the most according to claim 3, it is characterised in that the spool latus rectum of described valve unit
For 15mm-16mm.
The preferential banked direction control valves of monoblock type the most according to claim 4, it is characterised in that described check valve includes:
Valve seat, in tubular, has center guide hole, and one end of described center guide hole is closed, the other end forms spring cavity；
Spool, including the guide post being placed in the guide hole of described center and the valve head being positioned at described guide post end；And
Spring, is set on described guide post, and one end of described spring is positioned at described spring cavity, and the other end supports with valve head
Connect,
Wherein, described valve head is positioned in described ring shaped oil passage with being positioned at retractable, opens and closes with described valve port and coordinates.
The preferential banked direction control valves of monoblock type the most according to claim 8, it is characterised in that the top of the valve seat of described check valve is
Bolt head, covers in described bore in lid.
The preferential banked direction control valves of monoblock type the most according to claim 1, it is characterised in that described valve body includes being positioned at each described
First back oil road at the axial two ends of spool of valve unit and the second back oil road, described first back oil road and the second back oil road exist
Cross to oil return opening on the right side wall of valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610446518.7A CN105864137A (en) | 2016-06-17 | 2016-06-17 | Integral type priority multiway valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610446518.7A CN105864137A (en) | 2016-06-17 | 2016-06-17 | Integral type priority multiway valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105864137A true CN105864137A (en) | 2016-08-17 |
Family
ID=56650981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610446518.7A Pending CN105864137A (en) | 2016-06-17 | 2016-06-17 | Integral type priority multiway valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105864137A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106593983A (en) * | 2017-02-22 | 2017-04-26 | 常熟华威履带有限公司 | Hydraulic control device of hydraulic excavator |
| CN108180182A (en) * | 2018-01-15 | 2018-06-19 | 河北工程大学 | A kind of all hydraulic caterpillar reverse circulation engineering drilling rig dedicated integrated valve group |
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Application publication date: 20160817 |