CN101265927A - Automatic hydraulic change-over valve - Google Patents
Automatic hydraulic change-over valve Download PDFInfo
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- CN101265927A CN101265927A CNA2008100247422A CN200810024742A CN101265927A CN 101265927 A CN101265927 A CN 101265927A CN A2008100247422 A CNA2008100247422 A CN A2008100247422A CN 200810024742 A CN200810024742 A CN 200810024742A CN 101265927 A CN101265927 A CN 101265927A
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Abstract
The invention discloses an automatic reversing hydraulic valve which simplifies the internal structure of the valve, reduces the processing procedures and difficulties, and has stable reversing pressure, long service life and a maximum applicable pressure of 40MPa. The automatic hydraulic reversing valve comprises a valve, a hydraulic control mechanism, a pressure gauge and a base. The hydraulic control mechanism is arranged in the center of the upper part of the valve; two pressure gauges are arranged on the two seats of the left and the right sides of the upper part of the valve; the seats communicate with the oil circuit; an oil outlet A and an oil outlet B are arranged on the front wall of the valve; an oil inlet P and a return-oil inlet R are arranged on the rear wall of the valve; two piston cavities are arranged inside the valve; a main piston and a control piston are respectively arranged inside the cavities; gaps are left at the end of the pistons. In the hydraulic control mechanism, the main piston cavity communicates with the control piston cavity through the oil circuit of the valve; and the oil circuit respectively leads to the oil inlet P, the oil outlet A, the oil outlet B and the return-oil inlet R.
Description
Technical field
The present invention relates to a kind of hydrovalve, but relate in particular to the hydrovalve that a kind of automatic reverse pressure rating can reach 40MPa.
Background technique
Hydraulicdirectional control valve on the Domestic market can only apply to the 20MPa pressure rating at present, and 25MPa just can't satisfy client's needs with the lubrication system of upward pressure.Hydrovalve all adopts spring to control commutation for the active force of conversion valve block mostly at home, and to the requirement on machining accuracy height of parts, so present selector valve pressure error height, stability, the reliability of valve are not enough, the also high shortcoming of cost of production.
Summary of the invention
Goal of the invention of the present invention provide a kind of efficiently, be suitable for pressure rating and surpass 20MPa, and be up to the automatic hydraulic change-over valve of 40MPa.
The technical solution used in the present invention is: (middle part keep right position) (middle part keep left position)
Automatic hydraulic change-over valve, comprise valve body, hydraulic control, pressure gauge and base, described hydraulic control is located at the valve body center upper portion, two pressure gauges place on the joint chair of valve body top the right and left, joint chair communicates with oil circuit, described valve body antetheca is provided with oil outlet A and oil outlet B, the valve body rear wall is provided with oil inlet P and return opening R, it is characterized in that described valve inner is provided with two piston cavity, be equipped with main piston and control piston and end in the chamber respectively and leave the space respectively, described hydraulic control, the main piston chamber is communicated with by the oil circuit in the valve body with the control piston chamber, and described oil circuit leads to oil inlet P respectively, oil outlet A, oil outlet B and return opening R.
The oil circuit annexation is as follows: oil inlet P is communicated with middle part, main piston chamber; Described oil outlet A and oil outlet B are communicated with the middle left part in main piston chamber (middle part keep left position) and middle right part (middle part keep right position) respectively, and oil outlet A also is communicated with the left end in control piston chamber, and oil outlet B also is communicated with the right-hand member in control piston chamber; Return opening R is communicated with main piston chamber and control piston chamber; The hydraulic control bottom is communicated with middle part, main piston chamber, below forms working connection;
The piston place of hydraulic control is provided with an oil circuit, and an oil circuit two ends is communicated with middle part, control piston chamber; The middle left part in control piston chamber (middle part keep left position) is communicated with main piston chamber left end, and the middle right part in control piston chamber (middle part keep right position) is communicated with the right-hand member in main piston chamber.
Hydraulic control comprises adjusting nut, set screw nut, spring, pressure regulator valve housing control valve body and piston, described adjusting nut and set screw nut are threaded with the pressure regulator valve housing, spring housing is debug in the pressure shell body, spring top and adjusting nut offset, the control valve body bottom is built-in with piston, control valve body is connected the piston side and is connected with an oil circuit with the pressure regulation housing, the piston base working connection connects.
The spring upper and lower part is provided with spring seat I and spring seat II respectively.
One end of described valve body connects the commutation sender unit, and the controlling rod relative set of commutation sender unit is at an end in control piston chamber, and is touched by the control piston of motion.
Valve inner of the present invention is dug two piston cavity, and be equipped with main piston and control piston respectively, described hydraulic control, main piston, control piston are communicated with by the oil circuit in the valve body, described oil circuit leads to oil inlet P, oil outlet A, oil outlet B and return opening R respectively, having changed original most hydrovalve all adopts spring to control reversing mode for the active force of conversion valve block, and the fluid that has pressure in the employing oil circuit promotes the automatic reverse of hydraulicdirectional control valve, make the commutation pressure stability and suitable pressure rating is the highest can be to 40MPa.Valve inner of the present invention only is provided with main piston and two piston structures of control piston carry out the hydraulic pressure commutation, has simplified the internal structure of valve body, has reduced manufacturing procedure.
The oil circuit of the described control valve body left and right sides and control piston chamber and a left side, main piston chamber or right-hand end are communicated with, and described control valve body both sides oil circuit is communicated with the bottom oil circuit under the situation of opening piston, the connection of oil circuit or disconnect by the piston unlatching or close and control.
The piston sleeve of described control piston one end is fixedly connected with indicating arm, described indicating arm is connected with the commutating frequency sender unit in the valve body outside, the site operation personnel in time understands the commutation condition that detects hydrovalve with the motion conditions that can observe directly indicating arm by transparent tube on the sender unit like this.
This valve uses international state-of-the-art design concept, has broken through the mentality of designing of conventional hydraulic valve, has broken the chains that present lubrication system hydraulicdirectional control valve can only apply to the 20MPa pressure rating.This valve can be applicable in the electronic terminal type centralized lubrication system of various pressure ratings that this valve carries voltage regulation function and energy automatic reverse, and the commutation setting pressure can be adjusted at 0～40MPa.This valve arrangement is simple, easy to adjust, commutation is reliable, is a very practical selector valve.
Researched and developed this valve class voluntarily according to the customer demand claimant, the utilization of this valve up-to-date mentality of designing, be different from current like product fully.This valve and like product have following four big features:
Feature one, at present the hydraulicdirectional control valve nominal pressure of China is no more than the 25MPa pressure rating, because of automatic hydraulic change-over valve easy to use.Simple in structure.25MPa just can't satisfy client's needs with the lubrication system of upward pressure so the system below 25MPa uses the client all to prefer to adopt the automatic hydraulic commutation.So my company has spent time a year and a half to research and develop this series selector valve voluntarily.The nominal pressure of this valve has surpassed 25MPa, can reach 40MPa.So this valve nominal pressure grade height.
Feature two, this valve commutation pressure error are low, and this valve stability, reliability have surpassed other like product fully compared with similar products.Hydrovalve all adopts spring to control commutation for the active force of conversion valve block mostly at home.And this valve utilizes the automatic reverse under the effect of Regulation spring of pressure oil control reversing piston (pressure oil is acted directly on the piston) pressure oil.Thereby make this valve more reliable and more stable, handy than general valve class.This valve commutation pressure is steady.
Feature three, this valve applicability is strong, efficient is high.This valve can be applicable in the centralized lubrication system of various terminal type flow different brackets compared with similar products, and characteristics such as easily processing, operation is simple.The runner mouth all is no more than mostly in like product
, and inclined hole, the many difficulty of processing of auxiliary hole are big, often have error integral body to scrap to enterprise slightly and bring massive losses.Strong, the easily processing of this valve applicability.
Feature four, this valve have characteristics such as simple in structure, easy to operate, aesthetic in appearance.This valve is compared the difference that has in essence with other like product, and the automatic hydraulic change-over valve that reaches same grade in the inlet valve class adopts the laddering structural type commutation of three pistons.The present invention adopts two-piston to distribute laddering structural type commutation.The valve class formation of the present invention's design is simple by contrast, leading international like product.Also quite convenient in the operation, long service life.This valve arrangement is simple, easy to operate, long service life.
Three, technical parameter:
| Model | Peak rate of flow L/min | Nominal pressure MPa | Pressure range MPa | Set pressure MPa dispatches from the factory | Ambient temperature ℃ | Weight Kg |
| ZTF-P4 | 2.5 | 40 | 2.5～35 | 25 | 0～80 | 8 |
The present invention adopts the fluid with pressure to promote the commutation of two-piston structure, and by the unlatching of the piston control oil channel of control valve body or close, this structural type has been simplified the internal structure of valve body, reduced manufacturing procedure and difficulty, commutation pressure stability and high life and suitable pressure rating is the highest can be to 40MPa.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the A-A structural representation of Fig. 1
Fig. 3 is a rear view of the present invention.
Fig. 4 is a side view of the present invention.
Fig. 5 is the B-B structural representation of Fig. 3.
Fig. 6 is working principle Fig. 1 of the present invention.
Fig. 7 is working principle Fig. 2 of the present invention.
Wherein: 1-valve body, 2-pressure gauge, 3-base, the 4-hydraulic control, 5-joint chair, 6-oil outlet A, 7-oil outlet B, 8-oil inlet P, 9-return opening R, the 10-main piston, 11-control piston, 12-adjusting nut, the 13-set screw nut, 14-spring, 15-pressure regulator valve housing, 16-spring seat I, 17-spring seat II, 18-control valve body, the 19-piston, 20-oil circuit, 21-control piston inner chamber, 22-main piston left-hand end, 23-main piston right-hand end, 24-main piston inner chamber, 25-control piston left-hand end, 26-control piston right-hand end, the right chamber of 27-main piston, chamber, a 28-main piston left side, the right chamber of 29-control piston, chamber, a 30-control piston left side, 31-piston sleeve, the 32-indicating arm, 33-commutating frequency sender unit.
Embodiment
Shown in Fig. 1 to 7, the present invention includes valve body 1, hydraulic control 4, pressure gauge 2 and base 3, hydraulic control 4 is located at valve body 1 center upper portion, two pressure gauges 2 place on the joint chair 5 of valve body 1 top the right and left, joint chair 5 communicates with oil circuit 20, valve body 1 antetheca is provided with oil outlet A6 and oil outlet B7, valve body 1 rear wall is provided with oil inlet P 8 and return opening R9, valve body 1 inner the cutting has two piston cavity, and be equipped with main piston 10 and control piston 11 respectively, hydraulic control 4, main piston 10, control piston 11 is communicated with by the oil circuit in the valve body 1 20, and oil circuit 20 leads to oil inlet P 8 respectively, oil outlet A6, oil outlet B7 and return opening R9.Hydraulic control 4 comprises adjusting nut 12, set screw nut 13, spring 14, pressure regulator valve housing 15, spring seat I16, spring seat II17, control valve body 18 and piston 19, adjusting nut 12 and set screw nut 13 are threaded with pressure regulator valve housing 15, spring 14 is fixed on spring seat I16, in the pressure regulator valve housing 15 between the spring seat II17, control valve body 18 is built-in with piston 19, control valve body 18 contacts with spring seat II17 with piston 19 upper ends, control valve body 18 is connected with valve body 1, control valve body 18 both sides oil circuits 20 are communicated with the bottom oil circuit under the situation of opening piston 19, and the connection of oil circuit or disconnection are opened or closed and control by piston 19.The oil circuit of control valve body 18 left and right sides is back-shaped oil circuit, and is communicated with the inner chamber 21 of control piston 11 and a main piston left side or right-hand end 22,23.When main piston 10 and control piston 11 during on the right side, oil inlet P 8 communicates with control piston left-hand end 25 and fuel-displaced A6 oil circuit by main piston inner chamber 24, control valve body 18 both sides oil circuits communicate with control piston inner chamber 21 and main piston right-hand end 23 oil circuits, and return opening R9 communicates with the oil circuit of main piston left-hand end 22, left chamber 28, right chamber 27 and control piston right-hand end 26, right chamber 29, left chamber 30 and oil outlet B7; When main piston 10 and control piston 11 during in the left side, oil inlet P 8 communicates with control piston right-hand end 26 and oil outlet B7 oil circuit by main piston inner chamber 24, control valve body 18 both sides oil circuits communicate with control piston inner chamber 21 and main piston left-hand end 22 oil circuits, and return opening R9 communicates with the oil circuit of main piston right-hand end 23, right chamber 27, left chamber 28 and control piston left-hand end 25, left chamber 30, right chamber 29 and oil outlet A6.The piston sleeve 31 of control piston 11 1 ends is fixedly connected with indicating arm 32, and indicating arm 32 is connected with the commutating frequency sender unit 33 in the valve body outside.
Working principle of the present invention is as follows:
The oil cavity channel of valve as shown in Figure 6, pressure oil advances cavity in the main piston 10 from oil inlet P, pressure oil in the interior cavity flows out through oil outlet A, simultaneously pressure oil through another channeling at control piston 11 left ends, make control piston 11 be in the valve body right side, this moment, main piston 10 left chambeies and left side communicated with return opening, the B oil outlet communicates with return opening with control piston 11 left chambeies and right side, control piston 11 left sides are shut by pressure oil, after the pressure oil (outlet pressure) on main piston 10 inner chambers overcomes the active force of 14 pairs of pistons 19 of spring, piston 19 pressure oils are opened pressure oil and are acted on main piston 10 right sides through control piston 11 inner chambers, and main piston 10 moves to left.
After main piston 10, control piston 11 move on to the valve body left end as shown in Figure 7.This moment, main piston 10 right chambeies and right side communicated with return opening, and oil outlet A communicates with return opening with control piston 11 right chambeies and left side.Pressure oil advances main piston 10 interior cavities and flows out through oil outlet B, and pressure oil at control piston 11 right-hand members, makes control piston 11 be in the valve body left side through another channeling simultaneously.Control piston 11 right sides are shut by pressure oil, pressure oil (outlet pressure) on main piston 10 inner chambers overcomes active force back piston 10 pressure oils of 14 pairs of pistons 10 of spring and opens, pressure oil acts on main piston 10 left sides through control piston 11 inner chambers, main piston 10 moves to right, and control piston 11 moves to right simultaneously.(see figure 6) is finished a work cycle.Annotate: if detect the commutation condition of hydrovalve, the commutation sender unit can be installed on valve, when high pressure oil exports from " oil outlet A " commentaries on classics " oil outlet B ", piston moves in the valve, make the sender unit make contact, when piston reverses direction moved, the contact disconnected, and the user can be connected sender unit as required with controller or surveillance device.The site operation personnel is with the motion conditions that can observe directly indicating arm by transparent tube on the sender unit in addition.
During use, this valve should be installed in the front end of the controlled master of system, bye-pass, and be positioned at ventilation, drying and be convenient to check and do not have the position that motion is interfered on every side.Adjusting nut dextrorotation setting pressure is heightened, left-handed turning down.
Claims (6)
1, automatic hydraulic change-over valve, comprise valve body, hydraulic control, pressure gauge and base, described hydraulic control is located at the valve body center upper portion, two pressure gauges place on the joint chair of valve body top the right and left, joint chair communicates with oil circuit, described valve body antetheca is provided with oil outlet A and oil outlet B, the valve body rear wall is provided with oil inlet P and return opening R, it is characterized in that described valve inner is provided with two piston cavity, be equipped with main piston and control piston and end in the chamber respectively and leave the space respectively, described hydraulic control, the main piston chamber is communicated with by the oil circuit in the valve body with the control piston chamber, and described oil circuit leads to oil inlet P respectively, oil outlet A, oil outlet B and return opening R.
2, automatic hydraulic change-over valve according to claim 1 is characterized in that described oil circuit annexation is as follows: oil inlet P is communicated with middle part, main piston chamber; Described oil outlet A and oil outlet B are communicated with the middle left part and the middle right part in main piston chamber respectively, and oil outlet A also is communicated with the left end in control piston chamber, and oil outlet B also is communicated with the right-hand member in control piston chamber; Return opening R is communicated with main piston chamber and control piston chamber; The hydraulic control bottom is communicated with middle part, main piston chamber, below forms working connection;
The piston place of hydraulic control is provided with an oil circuit, and an oil circuit two ends is communicated with middle part, control piston chamber; The middle left part in control piston chamber is communicated with main piston chamber left end, and the middle right part in control piston chamber is communicated with the right-hand member in main piston chamber.
3, automatic hydraulic change-over valve according to claim 1, it is characterized in that described hydraulic control comprises adjusting nut, set screw nut, spring, pressure regulator valve housing control valve body and piston, described adjusting nut and set screw nut are threaded with the pressure regulator valve housing, spring housing is debug in the pressure shell body, spring top and adjusting nut offset, the control valve body bottom is built-in with piston, and control valve body is connected the piston side and is connected with an oil circuit with the pressure regulation housing, and piston base is connected with working connection.
4, automatic hydraulic change-over valve according to claim 1 is characterized in that described spring upper and lower part is provided with spring seat I and spring seat II respectively.
5, automatic hydraulic change-over valve according to claim 1 is characterized in that an end of described valve body connects the commutation sender unit, and the controlling rod relative set of commutation sender unit is at an end in control piston chamber, and is touched by the control piston of motion.
6, automatic hydraulic change-over valve according to claim 5 is characterized in that described sender unit is provided with the transparent tube of being convenient to observe the indicating arm motion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810024742A CN100593645C (en) | 2008-05-04 | 2008-05-04 | Automatic hydraulic change-over valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810024742A CN100593645C (en) | 2008-05-04 | 2008-05-04 | Automatic hydraulic change-over valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101265927A true CN101265927A (en) | 2008-09-17 |
| CN100593645C CN100593645C (en) | 2010-03-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810024742A Active CN100593645C (en) | 2008-05-04 | 2008-05-04 | Automatic hydraulic change-over valve |
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| CN (1) | CN100593645C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101839260A (en) * | 2010-03-21 | 2010-09-22 | 常德中联重科液压有限公司 | Step-down multipath reversing valve with two-position two-way hydraulic control valve |
| CN102678643A (en) * | 2012-04-25 | 2012-09-19 | 三一重型综采成套装备有限公司 | Hand-operated reversing valve and sealing structure thereof |
| CN104500478A (en) * | 2014-12-19 | 2015-04-08 | 林东亮 | Pneumatic automatic reversing valve, pneumatic reverser and method for applying same |
| CN105822617A (en) * | 2015-01-05 | 2016-08-03 | 山东交通学院 | Control valve realizing hydraulic cylinder automatic commutation |
-
2008
- 2008-05-04 CN CN200810024742A patent/CN100593645C/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101839260A (en) * | 2010-03-21 | 2010-09-22 | 常德中联重科液压有限公司 | Step-down multipath reversing valve with two-position two-way hydraulic control valve |
| CN101839260B (en) * | 2010-03-21 | 2011-11-23 | 常德中联重科液压有限公司 | Step-down multipath reversing valve with two-position two-way hydraulic control valve |
| CN102678643A (en) * | 2012-04-25 | 2012-09-19 | 三一重型综采成套装备有限公司 | Hand-operated reversing valve and sealing structure thereof |
| CN102678643B (en) * | 2012-04-25 | 2015-02-18 | 三一重型综采成套装备有限公司 | Hand-operated reversing valve and sealing structure thereof |
| CN104500478A (en) * | 2014-12-19 | 2015-04-08 | 林东亮 | Pneumatic automatic reversing valve, pneumatic reverser and method for applying same |
| CN104500478B (en) * | 2014-12-19 | 2016-06-08 | 林东亮 | Pneumatic automatic diverter valve, pneumatic diverter and using method thereof |
| CN105822617A (en) * | 2015-01-05 | 2016-08-03 | 山东交通学院 | Control valve realizing hydraulic cylinder automatic commutation |
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| Publication number | Publication date |
|---|---|
| CN100593645C (en) | 2010-03-10 |
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