CN203835840U - Plate type load-sensitive multi-tandem valve tail link - Google Patents
Plate type load-sensitive multi-tandem valve tail link Download PDFInfo
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- CN203835840U CN203835840U CN201420186748.0U CN201420186748U CN203835840U CN 203835840 U CN203835840 U CN 203835840U CN 201420186748 U CN201420186748 U CN 201420186748U CN 203835840 U CN203835840 U CN 203835840U
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- 239000000945 filler Substances 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 3
- 238000001914 filtration Methods 0.000 abstract description 2
- 238000006073 displacement reaction Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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Abstract
The utility model discloses a plate type load-sensitive multi-tandem valve tail link. The plate type load-sensitive multi-tandem valve tail link comprises a tail link valve body (1), the tail link valve body is provided with an oil inlet port P3, an oil return pipe T3, an external Ls port, a port I (4), a port II (5) and a port III (6), wherein the port I (4), the port II (5) and the port III (6) are used for connecting a reversing link; the inside of the tail link valve body is provided with an Ls straight oil way for communicating the port II (5) and the external Ls port. The plate type load-sensitive multi-tandem valve link also comprises a pressure compensation throttle valve mounted on the tail link valve body, the inside of the tail link valve body is also provided with an oil way VIII, an oil way I, an oil way IV and an oil way VI, and the Ls straight oil way is communicated with an oil return cavity T through the oil way VIII, the oil way I, the oil way IV and the oil way VI. By adding the pressure compensation throttle valve onto a load feedback oil way, the plate type load-sensitive multi-tandem valve link can achieve filtering effects on load feedback control pressure to filter out high-pressure components and to stabilize the load feedback control pressure, thereby improving the stability and accuracy of a load sensitive system on controlling a variable pump.
Description
Technical field
The utility model relates to a kind of multi-way valve, and specifically a kind of chip load sensing multi-way valve tail connection, belongs to multi-way valve technical field.
Background technique
Chip load sensing multi-way valve is widely used in mechanically moving, especially engineering machinery.Due to engineering machinery, actuator is many, and working procedure Zhong Duo actuator moves simultaneously, while adding complete machine work, operating mode is complicated, load changes constantly, system pressure impact phenomenon is obvious, not only can affect the reliability of system hydraulic element, also can cause the serious distortion of load feedback pressure simultaneously, the control performance of oil hydraulic pump is declined.Therefore effectively releasing the pressure, it is significant for the lifting of systematic function to impact.
Load sensitive system is mainly comprised of variable displacement pump, load-sensitive valve and actuator; conventionally can on variable displacement pump, be configured for the pressure difference valve of controlled variable pump stroking mechanism; pressure difference valve spool one end process pump mouth pressure; the other end used load feedback pressure and spring force, in stress balance state.Because existing chip load sensing multi-way valve tail connection does not have filter function to load feedback pressure, when the load feedback pressure direct effect with impacting is in the pressure difference valve of variable displacement pump time, can make the load feedback signal distortion of control pump, thereby cause the instability of flow of variable displacement pump, the Flow-rate adjustment control accuracy of variation pump.The problems such as secondly, existing load sensing multi-way valve system pressure is set valve and is mostly installed on oil-feed connection, although this structure has played the effect that limits system pressure, has oil-feed connection complex structure, and boundary dimension is larger.In addition, the function of existing chip load sensing multi-way valve tail connection is mainly as chip multi-way valve oil sealing cover plate, and next is to provide load feedback hydraulic fluid port and expansion oil inlet and outlet, and the function that can realize is simple.
Summary of the invention
The problem existing for above-mentioned prior art, the utility model provides a kind of chip load sensing multi-way valve tail connection, can carry out filtering to load feedback pressure, improves the stability that variable displacement pump is controlled and breathes out accuracy.
To achieve these goals, this chip load sensing multi-way valve tail connection comprises tail connection valve body, tail connection valve body is provided with oil inlet P 3, oil return inlet T 3, external Ls port and port I, port II and port III for being connected with commutation connection, the straight-through oil duct of Ls that has communications ports II and external Ls port in tail connection valve body, is provided with oil back chamber T between port III and oil return inlet T 3; Also comprise pressure compensation throttle valve, in described tail connection valve body, also have oil duct VIII, oil duct I, oil duct IV and oil duct VI, one end of described oil duct VIII is communicated with the straight-through oil duct of Ls, and the other end is communicated with one end of oil duct I; The oil duct I the other end is communicated with oil duct IV; One end of oil duct IV is communicated with oil back chamber T by oil duct VI; Described pressure compensation throttle valve is screw-in cartridge valve, and is arranged on tail connection valve body, over against the connectivity part of oil duct I and oil duct IV, and the suction side of pressure compensation throttle valve is over against oil duct I, and the outlet side of pressure compensation throttle valve is over against oil duct IV.
Preferably, also comprise pressure limit valve, in described tail connection valve body, also have oil duct II, oil duct III and oil duct V, one end of described oil duct II communicates with the connectivity part of oil duct I and oil duct VIII; The other end of oil duct II communicates with oil duct V, and one end of oil duct V is communicated with oil duct VI by oil duct III; Described pressure limit valve is screw-in cartridge valve, and is arranged on tail connection valve body, over against the connectivity part of oil duct II and oil duct V, and the suction side of pressure limit valve is over against oil duct II, and the outlet side of pressure compensation throttle valve is over against oil duct V.
Preferably, in described tail connection valve body, also have oil duct VII and oil duct IX, described oil duct VII and oil duct IX all communicate with the straight-through oil duct of Ls and oil duct VIII connectivity part; The end of described oil duct VII is provided with draws the formula plug I that rises; The end of described oil duct IX is provided with draws the formula plug II that rises.
Preferably, in the oil inlet P 3 of described tail connection valve body and oil return inlet T 3, be equipped with internal thread, it is stifled that oil inlet P 3 places are provided with filler opening oil, and oil return inlet T 3 places are provided with oil outlet screw plug.
Preferably,, the other end of described oil duct IV is provided with and draws the formula plug VI that rises; The end of oil duct VI is provided with draws the formula plug V that rises; The other end of oil duct V is provided with and draws the formula plug III that rises, the end of oil duct III to be provided with to draw the formula plug IV that rises.
Compared with prior art, the utility model by having increased pressure compensation throttle valve on load feedback oil circuit, this pressure compensation throttle valve plays filter action to load feedback pilot pressure, high pressure component can be filtered out, make load feedback pilot pressure steady, improve stability and the accuracy in load sensitive system, variable displacement pump controlled.Meanwhile, on load feedback oil circuit, increase pressure limit valve, and to increasing corresponding oil duct, not only can limit system Maximum operating pressure, protective system element, and can guarantee that overall structure is simple, avoid occurring the problems such as boundary dimension is larger.In addition, expansion filler opening provided by the invention can improve multi-way valve oil-feed rated flow, expands hydraulic fluid port and can reduce return oil pressure, and the heating of minimizing system, can realize more function.
Accompanying drawing explanation
Fig. 1 is hydraulic schematic diagram of the present utility model;
Fig. 2 is structural representation of the present utility model;
Fig. 3 is the structural representation at the utility model pressure compensation throttle valve place;
Fig. 4 is the structural representation at the utility model pressure limit valve place.
In figure: 1, tail connection valve body, 2, pressure compensation throttle valve, 3, pressure limit valve, 4, port I, 5, port II, 6, port III, 7, oil outlet screw plug, 8, external Ls port, 9, oil duct I, 10, oil duct II, 11, oil duct III, 12, oil duct IV, 13, filler opening oil is stifled, 14, oil duct V, 15, oil back chamber T, 16, oil duct VI, 17, draw the formula plug I that rises, 18, draw the formula plug II that rises, 19, draw the formula plug III that rises, 20, draw the formula plug IV that rises, 21, draw the formula plug V that rises, 22, draw the formula plug VI that rises, 23, Ls leads directly to oil duct, 24, oil duct VII, 25, oil duct VIII, 26, oil duct IX.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 1, Figure 2 and Figure 3, a kind of chip load sensing multi-way valve of the utility model tail connection, comprise tail connection valve body 1, tail connection valve body 1 is provided with oil inlet P 3, oil return inlet T 3, external Ls port 8 and port I4, port II5 and port III6 for being connected with commutation connection, the straight-through oil duct 23 of Ls that has communications ports II5 and external Ls port 8 in tail connection valve body 1, is provided with oil back chamber T15 between port III6 and oil return inlet T 3; Also comprise pressure compensation throttle valve 2, in described tail connection valve body 1, also have oil duct VIII25, oil duct I9, oil duct IV12 and oil duct VI16, one end of described oil duct VIII25 is communicated with the straight-through oil duct 23 of Ls, and the other end is communicated with one end of oil duct I9; The oil duct I9 the other end is communicated with oil duct IV12; One end of oil duct IV12 is communicated with oil back chamber T15 by oil duct VI16; Described pressure compensation throttle valve 2 is screw-in cartridge valve, and is arranged on tail connection valve body 1, over against the connectivity part of oil duct I9 and oil duct IV12, and the suction side of pressure compensation throttle valve 2 is over against oil duct I9, and the outlet side of pressure compensation throttle valve 2 is over against oil duct IV12.
Working procedure: the load feedback pressure Ls from work connection is communicated with the straight-through oil duct 23 of Ls of tail connection valve body 1 by port II5, by external Ls port 8, load feedback pressure is drawn, be applied in the pressure difference valve of hydraulic variable displacement pump, thus controlled variable pump delivery; Simultaneously, on the straight-through oil duct 23 of Ls, Ls load control signal acts on the suction side of pressure compensation throttle valve 2 by oil duct VII24, oil duct IX26, oil duct VIII25 and oil duct I9, its outlet side is communicated with oil back chamber T15 by oil duct IV12, oil duct VI16, pressure compensation throttle valve 2 can play filter action to Ls load feedback control signal, filter high pressure component, make pressure controling signal steady, improve stability and accuracy that Ls feedback control pressure is controlled volume adjustable hydraulic pump, and then improve the stability of system.
As further improvement of the utility model, as shown in Figure 1, Figure 2 and Figure 4, also can comprise pressure limit valve 3, in described tail connection valve body 1, also have oil duct II10, oil duct III11 and oil duct V14, one end of described oil duct II10 communicates with the connectivity part of oil duct I9 and oil duct VIII25; The other end of oil duct II10 communicates with oil duct V14, and one end of oil duct V14 is communicated with oil duct VI16 by oil duct III11; Described pressure limit valve 3 is screw-in cartridge valve, and is arranged on tail connection valve body 1, over against the connectivity part of oil duct II10 and oil duct V14, and the suction side of pressure limit valve 3 is over against oil duct II10, and the outlet side of pressure compensation throttle valve 2 is over against oil duct V14.During work, the load feedback pressure Ls joining from work is communicated with the straight-through oil duct 23 of Ls of tail connection valve body 1 by port II5, by external Ls port 8, load feedback pressure is drawn, be applied in the pressure difference valve of hydraulic variable displacement pump, thus controlled variable pump delivery; On the one hand, pressure compensation throttle valve 2 can play filter action to Ls load feedback control signal, filters high pressure component, makes pressure controling signal steady, improves stability and accuracy that Ls feedback control pressure is controlled volume adjustable hydraulic pump, improves the stability of system; On the other hand; on the straight-through oil duct 23 of Ls, Ls load control signal acts on the suction side of pressure limit valve 3 by oil duct VII24, oil duct IX26, oil duct VIII25 and oil duct II10; its outlet side communicates with oil back chamber T15 by oil duct V14, oil duct III11 and oil duct VI16; 3 pairs of system pressures of pressure limit valve provide constraints; while protective system element; overall structure is simple, and then avoids occurring the problems such as boundary dimension is larger.
Preferably, as shown in Figure 2, can within tail joins valve body 1, have oil duct VII24 and oil duct IX26, described oil duct VII24 and oil duct IX26 all communicate with the straight-through oil duct 23 of Ls and oil duct VIII25 connectivity part; The end of described oil duct VII24 is provided with draws the formula plug I17 that rises; The end of described oil duct IX26 is provided with draws the formula plug II18 that rises.
Preferably, in the oil inlet P 3 of described tail connection valve body 1 and oil return inlet T 3, be equipped with internal thread, oil inlet P 3 places are provided with filler opening oil and block up 13, and oil return inlet T 3 places are provided with oil outlet screw plug 7.During use, filler opening oil stifled 13 can be removed, connect external pipeline, the expansion oil inlet and outlet using it as chip load sensing multi-way valve, improves multi-way valve oil-feed rated flow; Oil outlet screw plug 7 is dismountable, connects external pipeline, as the hydraulic fluid port that expands of chip load sensing multi-way valve, reduces return oil pressure, the heating of minimizing system.
Preferably, the other end of described oil duct IV12 is provided with and draws the formula plug VI22 that rises; The end of oil duct VI16 is provided with draws the formula plug V21 that rises; The other end of oil duct V14 is provided with and draws the formula plug III19 that rises, the end of oil duct III11 to be provided with to draw the formula plug IV20 that rises.
Claims (5)
1. a chip load sensing multi-way valve tail joins, comprise tail connection valve body (1), tail connection valve body (1) is provided with oil inlet P 3, oil return inlet T 3, external Ls port (8) and the port I(4 for being connected with commutation connection), port II(5) and port III(6), in tail connection valve body (1), have communications ports II(5) and the Ls of external Ls port (8) lead directly to oil duct (23), port III(6) and oil return inlet T 3 between be provided with oil back chamber T(15);
It is characterized in that, also comprise pressure compensation throttle valve (2), in described tail connection valve body (1), also have oil duct VIII(25), oil duct I(9), oil duct IV(12) and oil duct VI(16), described oil duct VIII(25) the straight-through oil duct (23) of one end and Ls is communicated with, the other end and oil duct I(9) one end be communicated with; Oil duct I(9) the other end and oil duct IV(12) be communicated with; Oil duct IV(12) one end is by oil duct VI(16) with oil back chamber T(15) be communicated with; Described pressure compensation throttle valve (2) is screw-in cartridge valve, and be arranged on tail connection valve body (1) upper, over against oil duct I(9) and oil duct IV(12) connectivity part, the suction side of pressure compensation throttle valve (2) is over against oil duct I(9), the outlet side of pressure compensation throttle valve (2) is over against oil duct IV(12).
2. a kind of chip load sensing multi-way valve tail according to claim 1 joins, it is characterized in that, also comprise pressure limit valve (3), in described tail connection valve body (1), also have oil duct II(10), oil duct III(11) and oil duct V(14), described oil duct II(10) one end and oil duct I(9) and oil duct VIII(25) connectivity part communicate; Oil duct II(10) the other end and oil duct V(14) communicate, oil duct V(14) one end by oil duct III(11) with oil duct VI(16) be communicated with; Described pressure limit valve (3) is screw-in cartridge valve, and be arranged on tail connection valve body (1) upper, over against oil duct II(10) with oil duct V(14) connectivity part, the suction side of pressure limit valve (3) is over against oil duct II(10), the outlet side of pressure compensation throttle valve (2) is over against oil duct V(14).
3. a kind of chip load sensing multi-way valve tail according to claim 1 and 2 joins, it is characterized in that, in described tail connection valve body (1), also have oil duct VII(24) and oil duct IX(26), described oil duct VII(24) and oil duct IX(26) all lead directly to oil duct (23) and oil duct VIII(25 with Ls) connectivity part communicates; Described oil duct VII(24) end is provided with draws the formula plug I(17 that rises); Described oil duct IX(26) end is provided with draws the formula plug II(18 that rises).
4. a kind of chip load sensing multi-way valve tail according to claim 1 and 2 joins, it is characterized in that, in the oil inlet P 3 of described tail connection valve body (1) and oil return inlet T 3, be equipped with internal thread, oil inlet P 3 places are provided with filler opening oil stifled (13), and oil return inlet T 3 places are provided with oil outlet screw plug (7).
5. a kind of chip load sensing multi-way valve tail connection according to claim 1 and 2, is characterized in that described oil duct IV(12) the other end be provided with draw the formula plug VI(22 that rises); Oil duct VI(16) end is provided with draws the formula plug V(21 that rises); Oil duct V(14) the other end is provided with and draws the formula plug III(19 that rises), oil duct III(11) end be provided with draw the formula plug IV(20 that rises).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420186748.0U CN203835840U (en) | 2014-04-16 | 2014-04-16 | Plate type load-sensitive multi-tandem valve tail link |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420186748.0U CN203835840U (en) | 2014-04-16 | 2014-04-16 | Plate type load-sensitive multi-tandem valve tail link |
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| Publication Number | Publication Date |
|---|---|
| CN203835840U true CN203835840U (en) | 2014-09-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420186748.0U Expired - Lifetime CN203835840U (en) | 2014-04-16 | 2014-04-16 | Plate type load-sensitive multi-tandem valve tail link |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104405708A (en) * | 2014-09-18 | 2015-03-11 | 广西柳工机械股份有限公司 | Load-sensitive simulation valve and load-sensitive variable system of loading machine |
| CN105545850A (en) * | 2014-10-28 | 2016-05-04 | 徐工集团工程机械股份有限公司 | Load-sensitive functional valve, load-sensitive multi-way valve, load-sensitive hydraulic system and mini excavator |
| CN105736498A (en) * | 2014-12-12 | 2016-07-06 | 徐工集团工程机械股份有限公司 | Multiway valve tail connector, multiway valve and hydraulic system |
| CN108194441A (en) * | 2017-12-28 | 2018-06-22 | 徐工集团工程机械有限公司 | Multi-way valve tail joins and electro-hydraulic proportional multi-way valve |
| CN113931897A (en) * | 2021-11-03 | 2022-01-14 | 徐工集团工程机械股份有限公司 | Load sensitive multi-way valve integrated with multifunctional electric control assembly and engineering machine |
-
2014
- 2014-04-16 CN CN201420186748.0U patent/CN203835840U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104405708A (en) * | 2014-09-18 | 2015-03-11 | 广西柳工机械股份有限公司 | Load-sensitive simulation valve and load-sensitive variable system of loading machine |
| CN105545850A (en) * | 2014-10-28 | 2016-05-04 | 徐工集团工程机械股份有限公司 | Load-sensitive functional valve, load-sensitive multi-way valve, load-sensitive hydraulic system and mini excavator |
| CN105736498A (en) * | 2014-12-12 | 2016-07-06 | 徐工集团工程机械股份有限公司 | Multiway valve tail connector, multiway valve and hydraulic system |
| CN108194441A (en) * | 2017-12-28 | 2018-06-22 | 徐工集团工程机械有限公司 | Multi-way valve tail joins and electro-hydraulic proportional multi-way valve |
| CN108194441B (en) * | 2017-12-28 | 2024-02-02 | 江苏徐工工程机械研究院有限公司 | Multi-way valve tail connection and electro-hydraulic proportional multi-way valve |
| CN113931897A (en) * | 2021-11-03 | 2022-01-14 | 徐工集团工程机械股份有限公司 | Load sensitive multi-way valve integrated with multifunctional electric control assembly and engineering machine |
| CN113931897B (en) * | 2021-11-03 | 2024-04-30 | 徐工集团工程机械股份有限公司 | Load-sensitive multi-way valve integrated with multifunctional electric control assembly and engineering machinery |
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Granted publication date: 20140917 |
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| CX01 | Expiry of patent term |