CN102221024A - Large-flow mechanical feedback pilot control plug-in type proportional throttling valve system - Google Patents
Large-flow mechanical feedback pilot control plug-in type proportional throttling valve system Download PDFInfo
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- CN102221024A CN102221024A CN2011101952003A CN201110195200A CN102221024A CN 102221024 A CN102221024 A CN 102221024A CN 2011101952003 A CN2011101952003 A CN 2011101952003A CN 201110195200 A CN201110195200 A CN 201110195200A CN 102221024 A CN102221024 A CN 102221024A
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Abstract
The invention relates to a large flow mechanical feedback pilot control plug-in type proportional throttling valve system and in particular relates to forward and reverse flowing throttling valve system engineering machinery equipment. The system is characterized in that the side of a main valve sleeve is provided with a main valve oil inlet and a main valve oil outlet, a back-moving spring is arranged between a main valve core and a guide sleeve, one end of a pilot valve sleeve is provided with a screw cover, a device feedback spring is arranged between the guide valve core and the guide sleeve, a first control port is communicated with one end of a first check valve, the other end of the first check valve is communicated with a pilot valve oil inlet, a second control port is communicated with one end of a second check valve, the other end of the second check valve is communicated with a pilot valve work port, the pilot valve oil inlet is communicated with the pilot valve work port, a third control port is communicated with a guide valve control port, the guide valve return opening is communicated with the guide sleeve and a cover plate return opening. The throttling valve system provided by the invention has the advantages of simple structure, instantaneous open, high linearity and small hysteresis based on the adopted mechanical closed loop feedback, thus the throttling valve system can be widely applied to a hydraulic control system of engineering machinery, machine tool casting-forging, diecast metallurgy, shipping and mine industry.
Description
Technical field
The present invention relates to a kind of big flow machine feedback guide and control plug-in type proportional throttle valve system, particularly big flow, high-power, pilot valve proportional control flow, forward and reverse mobile big flow machine feedback guide control plug-in type proportional throttle valve systems engineering machinery.
Background technique
At present, what used multiple directional control valve all adopted in the engineering machinery is that valve core of the spool valve adds the structure of casting valve body, owing to be subjected to the influence of system pressure and body strength restriction, 12 millimeters latus rectums of its latus rectum maximum application to two, can not break through the flow of 25 millimeters latus rectums always, adopt above structure promptly to enable to reach, cost is also quite expensive, the user can not accept, so till now, domesticly can not produce high-power always, the engineering machinery of big flow, for example: bulldozer is as using above structure more than 500 horsepowers, its pressure loss reaches 30 kilograms, the energy consumption height, and external form is bulky, and it is bigger to take up room, while control section complex structure, the rate of fault height leaks seriously, and action is unstable, impact greatly, maintenance is inconvenient.
Summary of the invention
Purpose of the present invention provides a kind of big flow machine feedback guide and controls plug-in type proportional throttle valve system, and it is that pilot stage adopts the control of hydraulic pilot valve, and amplifier stage adopts servo spool, realizes that hydraulic power amplifies, and main adopts the cartridge valve mode of structure; Increase amplifier stage between pilot stage and the main and control and machine feedback, by the feedback spring coupling, realize the unlatching of spool ratio between guide's spool and the main valve plug, response is rapid, and closed safe is reliable, linearity height, and the little purpose of ring stagnates.
The big flow machine feedback of the present invention guide controls plug-in type proportional throttle valve system and takes following technological scheme to realize: it is by main valve housing, main valve plug, guide's valve pocket, guide's spool and control cover plate are formed, the side of main valve housing is provided with main valve filler opening and main valve oil outlet, device main valve plug in the axial bore of main valve housing, in the main valve plug axial bore guide sleeve is set, install Returnning spring between main valve plug and the guide sleeve, the main valve housing upper end is provided with control cover plate, the control cover plate end face axial is provided with pilot valve, pilot valve is by guide's valve pocket, guide's spool and blind nut are formed, in the pilot valve cover axial bore guide's spool is set, guide's valve pocket one end is provided with blind nut, install feedback spring between guide's spool and the guide sleeve, number one control mouthful connection number one one-way valve one end, the number one one-way valve the other end is communicated with the pilot valve filler opening, No. second control mouthful No. second one-way valve one end of connection, No. second the one-way valve the other end is communicated with the pilot valve working hole, the pilot valve filler opening is communicated with the pilot valve working hole, No. three control mouthful connection pilot valve control mouth, the pilot valve return opening is communicated with guide sleeve, the pilot valve return opening is communicated with the cover plate return opening, constitutes big flow, high-power, the pilot valve proportional control, can forward and reverse mobile big flow machine feedback guide control plug-in type proportional throttle valve system.
Working procedure of the present invention is as follows: when No. three control mouth do not have pressure, pilot valve is in closed condition, pressure oil enters the pilot valve filler opening through number one control mouth and number one one-way valve, by entering the main valve control chamber through the pilot valve working hole behind guide's spool, because the area of main valve control chamber is greater than the area of main valve filler opening, so main valve plug is in closed condition.When No. three control mouth has certain pressure, guide's spool is under the effect of pressure, overcome the power of feedback spring, guide's spool moves down certain distance, and the pilot valve filler opening is closed, and does not have pressure oil to enter the main valve control chamber, and the pilot valve return opening also is in closed condition, at this moment the main valve control chamber forms the sealing cavity volume, and it is constant that pressure keeps, and main valve plug is in steady state; When No. three control mouth increases certain pressure, guide's spool is under the effect of pressure, overcome the power of feedback spring, guide's spool continues to move down certain distance, the pilot valve return opening is opened, the pressure oil of main valve control chamber enters the pilot valve return opening through the pilot valve working hole, the pressure of main valve control chamber reduces, when the power that produces is lower than the power of main valve filler opening, main valve plug moves unlatching, when main valve plug moves a certain distance, when the power that feedback spring produces is controlled the power of mouthful generation greater than pilot valve, guide's spool just moves in the other direction, the pilot valve return opening is moved to closed condition, and after the pilot valve return opening was closed, at this moment the main valve control chamber formed the sealing cavity volume, it is constant that pressure keeps, and main valve plug is in steady state; When No. three control mouth pressure continues to increase, guide's spool is under the effect of pressure, overcome the power of feedback spring, guide's spool continues to move down, and the pilot valve return opening is opened, and the pressure oil of main valve control chamber enters the pilot valve return opening through the pilot valve working hole, the pressure of main valve control chamber reduces, when the power that produces was lower than the power of main valve filler opening, main valve plug continues to move to be opened, and has just realized ratio throttling control flow rate; When No. three control mouth pressure reduces to zero suddenly, and when the pressure of main valve oil outlet was high, guide's spool resetted rapidly, and the pressure oil of main valve oil outlet is by No. second control mouth, enter the main valve control chamber through No. second one-way valve, main valve plug is closed rapidly, can guarantee the Security operation of equipment like this, realize the unlatching of spool ratio, response rapidly, closed safe is reliable, and linearity height stagnates and encircles on the little hydraulic control system.
The effect that the big flow machine feedback of the present invention guide controls plug-in type proportional throttle valve system is simple in structure, instantaneous unlatching, proportional control, the spool realization is safe and reliable closes and opens, employing mechanical closed loop feedback, linearity height, the ring that stagnates is little, control degree and reliability height are widely used on the hydraulic control system of engineering machinery, lathe, casting forging, die casting, metallurgy, boats and ships, mine industry.
Description of drawings
The big flow machine feedback of the present invention guide controls plug-in type proportional throttle valve system and will describe in further detail in conjunction with the accompanying drawings.
Fig. 1 is the structural representation that the big flow machine feedback of the present invention guide controls plug-in type proportional throttle valve system.
Fig. 2 is A-A cross-sectional view that the big flow machine feedback of the present invention guide controls plug-in type proportional throttle valve system.
Fig. 3 is the hydraulic system structure schematic representation that the big flow machine feedback of the present invention guide controls plug-in type proportional throttle valve system.
1-main valve oil-in, 2-main valve housing, 3-main valve oil-out, 4-main valve plug, 5-back-moving spring, 6-fairlead, 7-feedback spring, 8-cover plate oil return opening, 9-pilot valve oil return opening, 10-guide spool, 11-guide valve pocket 12-control cover plate 13-blind nut 14-pilot valve oil-in 15-number one check valve 16-pilot valve working hole 17-number one control mouthful 18-No. the second control mouthful 19-No. the second check valve 20-pilot valve control mouthful 21-the No. three control mouthful.
Embodiment
With reference to Fig. 1,2,3, the big flow machine feedback of the present invention guide controls plug-in type proportional throttle valve system: it is by main valve housing 2, main valve plug 4, guide's valve pocket 11, guide's spool 10 and control cover plate 12 are formed, the side of main valve housing 2 is provided with main valve filler opening 1 and main valve oil outlet 3, device main valve plug 4 in the axial bore of main valve housing 2, in main valve plug 4 axial bores guide sleeve 6 is set, device Returnning spring 5 between main valve plug 4 and the guide sleeve 6, main valve housing 2 upper ends are provided with control cover plate 12, control cover plate 12 end face axial are provided with pilot valve, pilot valve is by guide's valve pocket 11, guide's spool 10 and blind nut 13 are formed, in guide's valve pocket 11 axial bores guide's spool 10 is set, guide's valve pocket 11 1 ends are provided with blind nut 13, device feedback spring 7 between guide's spool 10 and the guide sleeve 6, number one control mouthful 17 connection number one one-way valves, 15 1 ends, number one one-way valve 15 the other ends are communicated with pilot valve filler opening 14, No. second control mouthful No. second one-way valve 19 1 ends of 18 connections, No. second one-way valve 19 the other ends are communicated with pilot valve working hole 16, pilot valve filler opening 14 is communicated with pilot valve working hole 16, No. three control mouthful 21 connection pilot valve control mouths 20, pilot valve return opening 9 is communicated with guide sleeve 6, pilot valve return opening 9 is communicated with cover plate return opening 8, constitutes big flow, high-power, the pilot valve proportional control, can forward and reverse mobile big flow machine feedback guide control plug-in type proportional throttle valve system.
The big flow machine feedback of the present invention guide controls the embodiment of plug-in type proportional throttle valve system, working procedure of the present invention is as follows: when No. three control mouth 21 do not have pressure, pilot valve is in closed condition, pressure oil enters pilot valve filler opening 14 through number one control mouth 17 and number one one-way valve 15, by entering the main valve control chamber through pilot valve working hole 16 behind guide's spool 10, because the area of main valve control chamber is greater than the area of main valve filler opening 1, so main valve plug 4 is in closed condition.When No. three control mouth 21 has certain pressure, guide's spool 10 is under the effect of pressure, overcome the power of feedback spring 7, guide's spool 10 moves down certain distance, and pilot valve filler opening 14 is closed, and does not have pressure oil to enter the main valve control chamber, and pilot valve return opening 9 also is in closed condition, at this moment the main valve control chamber forms the sealing cavity volume, and it is constant that pressure keeps, and main valve plug 4 is in steady state; When No. three control mouth 21 increases certain pressures, guide's spool 10 is under the effect of pressure, overcome the power of feedback spring 7, guide's spool 10 continues to move down certain distance, pilot valve return opening 9 is opened, the pressure oil of main valve control chamber enters pilot valve return opening 9 through pilot valve working hole 16, the pressure of main valve control chamber reduces, when the power that produces is lower than the power of main valve filler opening 1, main valve plug 4 moves unlatching, when main valve plug 4 moves a certain distance, when the power that feedback spring produces is controlled the power of mouthful 20 generations greater than pilot valve, guide's spool 10 just moves in the other direction, pilot valve return opening 9 is moved to closed condition, and after pilot valve return opening 9 was closed, at this moment the main valve control chamber formed the sealing cavity volume, it is constant that pressure keeps, and main valve plug 4 is in steady state; When No. three control mouthful 21 pressure continue to increase, guide's spool 10 is under the effect of pressure, overcome the power of feedback spring 7, guide's spool 10 continues to move down, and pilot valve return opening 9 is opened, and the pressure oil of main valve control chamber enters pilot valve return opening 9 through pilot valve working hole 16, the pressure of main valve control chamber reduces, when the power that produces was lower than the power of main valve filler opening 1, main valve plug 4 continues to move to be opened, and has just realized ratio throttling control flow rate; When No. three control mouthful 21 pressure reduce to zero suddenly, and when the pressure of main valve oil outlet 3 was high, guide's spool 10 resetted rapidly, and the pressure oil of main valve oil outlet 3 is by No. second control mouth 18, enter the main valve control chamber through No. second one-way valve 19, main valve plug 4 is closed rapidly, can guarantee the Security operation of equipment like this, realize the unlatching of spool ratio, response rapidly, closed safe is reliable, and linearity height stagnates and encircles on the little hydraulic control system.
Claims (1)
1. one kind big flow machine feedback guide controls plug-in type proportional throttle valve system, it is by main valve housing (2), main valve plug (4), guide's valve pocket (11), guide's spool (10) and control cover plate (12) are formed, the side that it is characterized in that main valve housing (2) is provided with main valve filler opening (1) and main valve oil outlet (3), device main valve plug (4) in the axial bore of main valve housing (2), in main valve plug (4) axial bore guide sleeve (6) is set, install Returnning spring (5) between main valve plug (4) and the guide sleeve (6), main valve housing (2) upper end is provided with control cover plate (12), control cover plate (12) end face axial is provided with pilot valve, pilot valve is by guide's valve pocket (11), guide's spool (10) and blind nut (13) are formed, in guide's valve pocket (11) axial bore guide's spool (10) is set, guide's valve pocket (11) one ends are provided with blind nut (13), install feedback spring (7) between guide's spool (10) and the guide sleeve (6), number one control mouthful (17) is communicated with number one one-way valve (15) one ends, number one one-way valve (15) the other end is communicated with pilot valve filler opening (14), No. second control mouthful (18) is communicated with No. second one-way valve (19) one ends, No. second one-way valve (19) the other end is communicated with pilot valve working hole (16), pilot valve filler opening (14) is communicated with pilot valve working hole (16), No. three control mouthful (21) is communicated with pilot valve control mouthful (20), pilot valve return opening (9) is communicated with guide sleeve (6), pilot valve return opening (9) is communicated with cover plate return opening (8), constitutes big flow machine feedback guide and controls plug-in type proportional throttle valve system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101952003A CN102221024A (en) | 2011-08-22 | 2011-08-22 | Large-flow mechanical feedback pilot control plug-in type proportional throttling valve system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101952003A CN102221024A (en) | 2011-08-22 | 2011-08-22 | Large-flow mechanical feedback pilot control plug-in type proportional throttling valve system |
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| CN102221024A true CN102221024A (en) | 2011-10-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101952003A Pending CN102221024A (en) | 2011-08-22 | 2011-08-22 | Large-flow mechanical feedback pilot control plug-in type proportional throttling valve system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102788056A (en) * | 2012-08-21 | 2012-11-21 | 山东泰丰液压股份有限公司 | Hydraulic control system of electro-hydraulic feedback proportion throttle cartridge valve |
| CN104089078A (en) * | 2014-07-16 | 2014-10-08 | 上海豪高机电科技有限公司 | Proportional control device used for linear-stroke valve |
| CN105090149A (en) * | 2015-06-12 | 2015-11-25 | 北京航空航天大学 | Positive-feedback electro-hydraulic high-speed two-way switching valve |
| CN106640811A (en) * | 2016-11-24 | 2017-05-10 | 浙江华益精密机械股份有限公司 | Leak-tight pressure compensation electric proportional throttle valve |
| CN112594239A (en) * | 2020-12-24 | 2021-04-02 | 天津市天锻压力机有限公司 | Hydraulic control system for jaw of skin stretching hydraulic machine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201155498Y (en) * | 2008-01-21 | 2008-11-26 | 浙江圣邦机械有限公司 | Integrated one-way balance valve |
| CN202158028U (en) * | 2011-07-13 | 2012-03-07 | 山东泰丰液压股份有限公司 | High flow mechanical feedback pilot control inserted type proportional throttle valve |
-
2011
- 2011-08-22 CN CN2011101952003A patent/CN102221024A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201155498Y (en) * | 2008-01-21 | 2008-11-26 | 浙江圣邦机械有限公司 | Integrated one-way balance valve |
| CN202158028U (en) * | 2011-07-13 | 2012-03-07 | 山东泰丰液压股份有限公司 | High flow mechanical feedback pilot control inserted type proportional throttle valve |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102788056A (en) * | 2012-08-21 | 2012-11-21 | 山东泰丰液压股份有限公司 | Hydraulic control system of electro-hydraulic feedback proportion throttle cartridge valve |
| CN104089078A (en) * | 2014-07-16 | 2014-10-08 | 上海豪高机电科技有限公司 | Proportional control device used for linear-stroke valve |
| CN105090149A (en) * | 2015-06-12 | 2015-11-25 | 北京航空航天大学 | Positive-feedback electro-hydraulic high-speed two-way switching valve |
| CN106640811A (en) * | 2016-11-24 | 2017-05-10 | 浙江华益精密机械股份有限公司 | Leak-tight pressure compensation electric proportional throttle valve |
| CN112594239A (en) * | 2020-12-24 | 2021-04-02 | 天津市天锻压力机有限公司 | Hydraulic control system for jaw of skin stretching hydraulic machine |
| CN112594239B (en) * | 2020-12-24 | 2022-07-01 | 天津市天锻压力机有限公司 | Hydraulic control system for jaw of skin stretching hydraulic machine |
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Application publication date: 20111019 |