CN102168644A - Hydraulic drive device - Google Patents
Hydraulic drive device Download PDFInfo
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- CN102168644A CN102168644A CN 201110144617 CN201110144617A CN102168644A CN 102168644 A CN102168644 A CN 102168644A CN 201110144617 CN201110144617 CN 201110144617 CN 201110144617 A CN201110144617 A CN 201110144617A CN 102168644 A CN102168644 A CN 102168644A
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Abstract
The invention discloses a hydraulic drive device comprising a hydraulic motor, as well as a three-position two-way reversing valve fixed on the hydraulic motor, wherein the hydraulic motor comprises a stator and a rotor; the three-position two-way reversing valve comprises a valve body; the valve body is internally provided with a valve chest and a valve rod; the valve body is provided with a first driving liquid path, a second driving liquid path, a return liquid path, an inlet liquid path and an outlet liquid path; the return liquid path is close to the second driving liquid path and communicated with the outlet liquid path; the inlet liquid path is communicated with the valve chest; the outer periphery of the valve rod is provided with three annular convex parts; two adjacent annular convex parts form an inlet liquid groove and a return liquid groove in between; the valve rod is provided with a return liquid channel that stretches axially and communicates the return liquid path with the first driving liquid path when the valve rod slides to another station; and the valve body is internally rotatably provided with a reversing device that is linked with the rotor and enables the valve rod to slide back and forth along the valve chest to reverse the liquid paths back and forth. The hydraulic drive device is strong in safety and reliability and simple and convenient in operation.
Description
Technical field
The present invention relates to a kind of drive unit, be meant a kind of usefulness fluid pressure drive device aboard ship especially.
Background technique
For first kind of power source that full-automatic back washing filter aboard ship is installed is cylinder, and the linear reciprocating motion by cylinder is realized intermittent rotation by the conversion of ratchet mechanism.After shortcoming was to utilize cylinder to do power source, cooperation everywhere was with to be connected needs very accurate, in case when individual link wearing and tearing being arranged or producing slight angle, cylinder will quit work, and aboard ship pressurized air is very unstable, therefore this driving mode is used seldom; Second kind of power source is motor, realize continuously rotatablely moving at a slow speed by motor driven gear, shortcoming needs to use the 220V high-tension electricity exactly, safety coefficient is lower, add motor driving and can and not stop because of wearing and tearing or certain link generation distortion, therefore reliability in the course of the work is lower.
Summary of the invention
Technical problem to be solved by this invention is: provide that a kind of safety reliability is strong, the fluid pressure drive device of operation simple and convenient.
For solving the problems of the technologies described above, technological scheme of the present invention is: a kind of fluid pressure drive device, comprise oil hydraulic motor, described oil hydraulic motor comprises stator and is arranged on the interior rotor of stator, be provided with the liquid barrier of two symmetries in the described stator, rotor is provided with the blade of two symmetries, two liquid barriers and two blades are divided into four liquid storage cylinders with the cavity in the stator, two liquid storage cylinders at diagonal angle communicate by being arranged on epitrochanterian infusion channel respectively, described fluid pressure drive device also comprises three two logical selector valves that are fixed on the described oil hydraulic motor, three two logical selector valves comprise valve body, be provided with valve pocket in the described valve body, be slidingly fitted with valve rod in the described valve pocket, described valve body is provided with first and drives the liquid road, second drives the liquid road, go back to liquid liquid road, feed liquor road and fluid road, the position on described time liquid liquid road drives the liquid road near second and is communicated with the fluid road, described feed liquor road and valve pocket are communicated with, described first drives liquid road and second drives the liquid road and respectively valve pocket is communicated with adjacent two liquid storage cylinders in four liquid storage cylinders, the outer circumferential face of described valve rod is provided with three annular protrusions, form a feed liquor groove and one time liquid groove between adjacent two annular protrusions, described feed liquor groove drives the liquid road with first respectively when valve rod slides into two different stations or the second driving liquid road is communicated with, described time liquid groove will go back to liquid liquid road and second during to one of them station in valve stem slides and drive the liquid road and be communicated with, described valve rod is provided with and will goes back to liquid liquid road and first during to another station in valve stem slides and drive the axially extended back flow channel that the liquid road is communicated with, and is rotatablely equipped with the rotor interlock in the described valve body and valve rod is reciprocatingly slided along valve pocket and the liquid road is carried out the reversing arrangement of reciprocating reversing.
As a kind of preferred scheme, described reversing arrangement comprises the commutation chamber that is arranged in the valve body, rotation is installed in the valve body and the commutation joint that is connected with rotor, described commutation joint will commutate the chamber be separated into first the commutation half chamber and second the commutation half chamber, described commutation joint is provided with when positive counter deflexion the commutation liquid road that feed liquor road and first commutation half chamber or second commutation, half chamber are communicated with, described first commutation half chamber and second commutation, half chamber are positioned at two application of force chamber portions that the valve rod two ends can promote valve stem slides by two corresponding connections in application of force liquid road with described valve pocket respectively, and described fluid road is communicated with the chamber of commutating.
As a kind of preferred scheme, the end clamping of the rotor shaft of described commutation joint and rotor, described rotor shaft is provided with draw-in groove, and described commutation joint is provided with the fixture block that snaps in described draw-in groove.
As a kind of preferred scheme, described commutation liquid road comprises the first separatory hole, the second separatory hole and the commutation inlet opening that radially is arranged on the described commutation joint, and the described commutation inlet opening and the first separatory hole, the second separatory hole all are communicated with.
As a kind of preferred scheme, be provided with two linings that are positioned at described commutation joint two ends in the described valve body, described commutation joint rotates and is installed between two linings, described commutation joint is provided with the axial hole that is communicated with two lining inner chambers, is communicated with by auxiliary liquid road between described lining inner chamber and the valve pocket.
After having adopted technique scheme, effect of the present invention is: owing to adopt fluid pressure drive device, therefore, when initial station, stem position is that the second driving liquid road is communicated with the feed liquor groove, first drives the liquid road is communicated with time liquid liquid road by back flow channel, feed driving liquid to the feed liquor road, driving liquid enters in the valve pocket from the feed liquor road, driving liquid enters in two liquid storage cylinders that communicate with it by the second driving liquid road from the feed liquor groove, because increasing, its internal pressure then drives rotor deflection, rotor deflection drives the reversing arrangement interlock simultaneously, reversing arrangement makes it drive liquid the commutation of liquid road and promotes valve rod to another station slip, like this, valve stem slides is communicated with the feed liquor groove gradually with the first driving liquid road, the second driving liquid road is communicated with by returning the liquid groove gradually with time liquid liquid road, at this moment, driving liquid enters in two other liquid storage cylinder and its pressure is increased from the first driving liquid road and drives the reverse deflection of rotor, thereby the blade extruding drives two liquid storage cylinders that the liquid road communicates with second, making driving liquid in it drive the liquid road from second enters into back the liquid groove and then discharges from the fluid road through time liquid liquid road, and the reverse deflection of rotor drives the reversing arrangement interlock, thereby make the commutation of liquid road, at this moment, driving the liquid actuate valve stem slides to initial station, the first driving liquid road is communicated with back flow channel gradually, second drives the liquid road is communicated with the feed liquor groove, driving liquid in two liquid storage cylinders that the while and the first driving liquid road are communicated with flow into back the liquid groove from back flow channel, and then flow out from the fluid road on warp time liquid liquid road, so repeatedly, just make rotor back and forth deflection back and forth, thereby realize driving to the full-automatic back washing filter, whole process only need feed driving liquid and can finish automatically, the operation simple and convenient, the fluid pressure drive device safety reliability is strong.
Again owing to be provided with two linings that are positioned at described commutation joint two ends in the described valve body, described commutation joint rotates and is installed between two linings, described commutation joint is provided with the axial hole that is communicated with two lining inner chambers, be communicated with by auxiliary liquid road between described lining inner chamber and the valve pocket, therefore, by auxiliary liquid road, drive liquid and just can enter into the lining inner chamber from valve pocket, thereby the deflection that makes the commutation joint is in one drives the pendular ring border, and its deflection is rotated flexibly, and reliability strengthens.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the plan view of the embodiment of the invention;
Fig. 2 is that the present invention removes three two plan views behind the logical selector valve;
Fig. 3 is the sectional view of Fig. 1 on the A-A direction;
Fig. 4 is that Fig. 1 is the sectional view on the B-B direction;
Fig. 5 is the scheme of installation of stator and rotor;
Fig. 6 is the sectional view of Fig. 5 on the C-C direction;
Fig. 7 is the plan view of three two logical selector valves;
Fig. 8 is the sectional view of Fig. 7 on the D-D direction;
Fig. 9 is the sectional view of Fig. 7 on the E-E direction;
Figure 10 is the schematic representation of Fig. 7 on the F direction;
Figure 11 is the explosive view of three two logical selector valves of the embodiment of the invention;
Figure 12 is a part of exploded perspective view of embodiment of the invention oil hydraulic motor;
Figure 13 is the exploded perspective view of another part of embodiment of the invention oil hydraulic motor;
In the accompanying drawing: 1. oil hydraulic motor; 11. motor loam cake; 12. motor lower cover; 13. stator; 131. first liquid storage cylinder; 132. second liquid storage cylinder; 133. the 3rd liquid storage cylinder; 134. the 4th liquid storage cylinder; 135. liquid barrier; 14. rotor; 141. rotor shaft; 1411. draw-in groove; 142. blade; 143. infusion channel; 2. three two lead to selector valves; 21. feed liquor road; 22. fluid road; 23. valve body; 231. valve pocket; 2311. first application of force chamber portion; 2312. second application of force chamber portion; 232. valve rod; 2321. feed liquor groove; 2322. return the liquid groove; 2323. back flow channel; 2324. annular protrusion; 233. first drives the liquid road; 234. second drives the liquid road; 235. screw plug; 24. valve gap; 25 reversing arrangements; 251. commutation joint; 2511. commutation inlet opening; 2512. the second separatory hole; 2513. the first separatory hole; 2514. fixture block; 2515. axial hole; 252. lining; 26. commutation chamber; 261. first commutation, half chamber; 262. second commutation, half chamber; 27. first application of force liquid road; 28. second application of force liquid road; 29. go back to liquid liquid road; 210. auxiliary liquid road; 211 pads.
Embodiment
The present invention is described in further detail below by specific embodiment.
A kind of fluid pressure drive device, as shown in figure 1 to figure 13, it comprises oil hydraulic motor 1, described oil hydraulic motor 1 comprises stator 13 and the rotor 14 that is arranged in the stator 13, described stator 13 top and bottom are fixing motor loam cake 11 and motor lower cover 12 respectively, between motor loam cake 11 and motor lower cover 12, described rotor 14 is rotatably installed in the stator 13 and by seal ring by bearing and is sealed and matched described stator 13 by bolt.Be provided with the liquid barrier 135 of two symmetries in the described stator 13, rotor 14 is provided with the blade 142 of two symmetries, two liquid barriers 135 and two blades 142 are divided into four liquid storage cylinders with the cavity in the stator 13, as shown in Figure 4, by counterclockwise being called first liquid storage cylinder 131, second liquid storage cylinder 132, the 3rd goes out sap cavity and the 4th liquid storage cylinder 134, two liquid storage cylinders at diagonal angle communicate by the infusion channel 143 that is arranged on the rotor 14 respectively, promptly, first liquid storage cylinder 131 and the 3rd liquid storage cylinder 133 are communicated with by an infusion channel 143, are communicated with by another infusion channel 143 between second liquid storage cylinder 132 and the 4th liquid storage cylinder 134.
Described fluid pressure drive device also comprises three two logical selector valves 2 that are fixed on the described oil hydraulic motor 1, three two logical selector valves 2 comprise valve body 23, valve gap 24 is installed on the described valve body 23, be provided with pad 211 between valve gap 24 and the valve body 23, described valve body 23 is provided with pad 211 by on the motor loam cake 11 that is bolted to oil hydraulic motor 1 between described valve body 23 and the motor loam cake 11.Be provided with valve pocket 231 in the described valve body 23, the two ends of described valve pocket 231 are by screw plug 235 spacing and sealings, be slidingly fitted with valve rod 232 in the described valve pocket 231, as Fig. 3, shown in Figure 7, be in two ends of valve rod 232 and valve pocket 231 positions between the screw plug 235 and be called first application of force chamber portion 2311 and second application of force chamber portion 2312; Described valve body 23 is provided with first and drives liquid road 233, second drives liquid road 234, go back to liquid liquid road 29, feed liquor road 21 and fluid road 22, the position on described time liquid liquid road 29 drives liquid road 234 near second and is communicated with fluid road 22, described feed liquor road 21 and valve pocket 231 are communicated with, described first drives liquid road 233 and second drives liquid road 234 and respectively valve pocket 231 is communicated with adjacent two liquid storage cylinders in four liquid storage cylinders, promptly, first drives liquid road 233 and second, the 4th liquid storage cylinder 132,134 are communicated with, second drives liquid road 234 and first, the 3rd liquid storage cylinder 131,133 are communicated with, the outer circumferential face of described valve rod 232 is provided with three annular protrusions 2324, form a feed liquor groove 2321 and one time liquid groove 2322 between adjacent two annular protrusions 2324, described feed liquor groove 2321 drives liquid road 233 with first respectively when valve rod 232 slides into two different stations or the second driving liquid road 234 is communicated with, as Fig. 4, shown in Figure 8, described time liquid groove 2322 will go back to liquid liquid road 29 and second and drive 234 connections of liquid road when valve rod 232 slides into one of them station, described valve rod 232 is provided with will return the axially extended back flow channel 2323 that liquid liquid road 29 and first drives 233 connections of liquid road when valve rod 232 slides into another station.That is to say that when valve rod 232 slided into one of them station first driving liquid road 233 and 2321 connections of feed liquor groove, second 234 on the driving liquid road was passed through back liquid groove 2322 and is communicated with time liquid liquid road 29; When valve rod 232 slides into another station second driving liquid road 234 and 2321 connections of feed liquor groove, first drives 233 on liquid road passes through back flow channel 2323 and returns liquid groove 2322 to be communicated with time liquid liquid road 29, is rotatablely equipped with rotor 14 interlocks in the described valve body 23 and valve rod 232 is reciprocatingly slided along valve pocket 231 and the liquid road is carried out the reversing arrangement 25 of reciprocating reversing.
Described reversing arrangement 25 comprises the commutation chamber 26 that is arranged in the valve body 23, rotation is installed in the valve body 23 and the commutation joint 251 that is connected with rotor 14, be provided with two linings 252 that are positioned at described commutation joint 251 two ends in the described valve body 23, described commutation joint 251 rotates and is installed between two linings 252, the end clamping of the rotor shaft 141 of described commutation joint 251 and rotor 14, described rotor shaft 141 is provided with draw-in groove 1411, described commutation joint 251 is provided with the fixture block 1514 that snaps in described draw-in groove 1411, described fixture block 1514 is a cuboid shape fixture block 1514, snap in the draw-in groove 1411 by fixture block 1514, realize that rotor 14 drives 251 deflections of commutation joint when deflection.Described commutation joint 251 will commutate chamber 26 be separated into first the commutation half chamber 261 and second the commutation half chamber 262, described commutation joint 251 is provided with when positive counter deflexion the commutation liquid road that feed liquor road 21 and first commutation half chamber 261 or second commutation, half chamber 262 are communicated with, described commutation liquid road comprises the first separatory hole 2513 that radially is arranged on the described commutation joint 251, the second separatory hole 2512 and commutation inlet opening 2511, described commutation inlet opening 2511 and feed liquor road 21 are communicated with, the described commutation inlet opening 2511 and the first separatory hole 2513, the second separatory hole 2512 all is communicated with, described first commutation half chamber 261 and second commutation, half chamber 262 are positioned at valve rod 232 two ends with described valve pocket 231 respectively can promote two application of force chamber portions of valve rod 232 slips by two corresponding connections in application of force liquid road, promptly, first commutation, half chamber 261 is communicated with by first application of force liquid road 27 and first application of force chamber portion 2311, described second commutation half chamber 262 is communicated with by second application of force liquid road 28 and second application of force chamber portion 2312, and described fluid road 22 is communicated with time liquid liquid road 29.When rotor 14 counterclockwise deflections, when driving the reverse deflection of commutation joint 251, the described first separatory hole 2513 is communicated with first commutation half chamber 261 and feed liquor road 21, driving liquid flows into from the first separatory hole 2513, enter into first application of force chamber portion, 2311 interior actuate valve stem 232 through first application of force liquid road 27 and slide into a station, the slip of valve rod 232 then makes first to drive liquid road 233 and 2321 connections of feed liquor groove, the second driving liquid road 234 and return 2322 connections of liquid groove; When the clockwise deflection of rotor 14, the second separatory hole 2512 is communicated with described second commutation half chamber 262 and feed liquor road 21, driving liquid flows into from the second separatory hole 2512, enter into second application of force chamber portion, 2312 interior actuate valve stem 232 reverse slide to another station through second application of force liquid road 28, second drives liquid road 234 and 2321 connections of feed liquor groove, the first driving liquid road 233 and back flow channel 2323 connections, and then is communicated with time liquid groove 2322.
For make the commutation joint 251 rotation more flexible, safety reliability is more stable, described commutation joint 251 is provided with the axial hole 2515 that is communicated with two lining 252 inner chambers, be communicated with by auxiliary liquid road 210 between described lining 252 inner chambers and the valve pocket 231, drive liquid like this and just can enter into lining 252 inner chambers from valve pocket 231, thereby make the deflection of commutation joint 251 be in a liquid environment, not only can avoid the commutating phenomenon of leakage of joint 251, commutation joint 251 is rotated flexibly, safe and reliable.
Working principle of the present invention is: at first, the initial station of valve rod 232 is that the first driving liquid road 233 and back flow channel 2323 are communicated with, second drives liquid road 234 and 2321 connections of feed liquor groove, feed driving liquid to feed liquor road 21, driving liquid enters in the valve pocket 231 from feed liquor road 21, drive liquid road 234 through second then and enter into first liquid storage cylinder 131 and the 3rd liquid storage cylinder 133, at this moment, pressure in first liquid storage cylinder 131 and the 3rd liquid storage cylinder 133 increases, promote blade 142 and make rotor 14 counterclockwise deflections, second, the 4th liquid storage cylinder 132, then drive liquid road 233 if any driving liquid in 134 through first, back flow channel 2323, go back to liquid liquid road 29, discharge on fluid road 22, and rotor 14 drives the 251 counterclockwise deflections of commutation joint, the first separatory hole 2513 is communicated with first commutation half chamber 261 and feed liquor road 21 gradually, drive liquid this moment and enter into first commutation, half chamber 261, enter into first application of force chamber portion 2311 through first application of force liquid road 27, hydraulic pressure in first application of force chamber portion 2311 increases, actuate valve stem 232 is slided to another station, at this moment, feed liquor groove 2321 is communicated with the first driving liquid road 233 gradually, and return liquid liquid road 29 pass through back liquid groove 2322 gradually with second driving liquid road 234 connections, at this moment, driving liquid enters in second liquid storage cylinder 132 and the 4th liquid storage cylinder 134 from the first driving liquid road 233, hydraulic pressure in second liquid storage cylinder 132 and the 4th liquid storage cylinder 134 increase and rotor 14 clockwise deflections when promoting blade 142, at this moment, driving liquid in blade 142 extruding first liquid storage cylinders 131 and the 3rd liquid storage cylinder 133 makes it drive liquid road 234 from second and enters into back liquid groove 2322, and pass through go back to liquid liquid road 29 and 22 discharge from the fluid road, at this moment, the clockwise deflection of rotor 14 drives the 251 clockwise deflections of commutation joint, the second separatory hole 2512 is communicated with second commutation half chamber 262 and feed liquor road 21 gradually, drive liquid this moment and enter into second commutation, half chamber 262, enter into second application of force chamber portion 2312 through second application of force liquid road 28, hydraulic pressure in second application of force chamber portion 2312 increases, promoting valve rod 232 slides to initial station, at this moment, feed liquor groove 2321 is communicated with the second driving liquid road 234 gradually, and the first driving liquid road 233 is communicated with back flow channel 2323 gradually, also just be communicated with time liquid liquid road 29 gradually, so and so forth, this fluid pressure drive device is realized reciprocal yaw motion by three two logical selector valves 2 and commutation joint 251 fully, avoided the existence of various unreliable factors fully, improve the flexibility and the Security of fluid pressure drive device more, satisfied the power demand of full-automatic back washing filter.
Claims (5)
1. fluid pressure drive device, comprise oil hydraulic motor, described oil hydraulic motor comprises stator and is arranged on the interior rotor of stator, it is characterized in that: the liquid barrier that is provided with two symmetries in the described stator, rotor is provided with the blade of two symmetries, two liquid barriers and two blades are divided into four liquid storage cylinders with the cavity in the stator, two liquid storage cylinders at diagonal angle communicate by being arranged on epitrochanterian infusion channel respectively, described fluid pressure drive device also comprises three two logical selector valves that are fixed on the described oil hydraulic motor, three two logical selector valves comprise valve body, be provided with valve pocket in the described valve body, be slidingly fitted with valve rod in the described valve pocket, described valve body is provided with first and drives the liquid road, second drives the liquid road, go back to liquid liquid road, feed liquor road and fluid road, the position on described time liquid liquid road drives the liquid road near second and is communicated with the fluid road, described feed liquor road and valve pocket are communicated with, described first drives liquid road and second drives the liquid road and respectively valve pocket is communicated with adjacent two liquid storage cylinders in four liquid storage cylinders, the outer circumferential face of described valve rod is provided with three annular protrusions, form a feed liquor groove and one time liquid groove between adjacent two annular protrusions, described feed liquor groove drives the liquid road with first respectively when valve rod slides into two different stations or the second driving liquid road is communicated with, described time liquid groove will go back to liquid liquid road and second during to one of them station in valve stem slides and drive the liquid road and be communicated with, described valve rod is provided with and will goes back to liquid liquid road and first during to another station in valve stem slides and drive the axially extended back flow channel that the liquid road is communicated with, and is rotatablely equipped with the rotor interlock in the described valve body and valve rod is reciprocatingly slided along valve pocket and the liquid road is carried out the reversing arrangement of reciprocating reversing.
2. fluid pressure drive device as claimed in claim 1, it is characterized in that: described reversing arrangement comprises the commutation chamber that is arranged in the valve body, rotation is installed in the valve body and the commutation joint that is connected with rotor, described commutation joint will commutate the chamber be separated into first the commutation half chamber and second the commutation half chamber, described commutation joint is provided with when positive counter deflexion the commutation liquid road that feed liquor road and first commutation half chamber or second commutation, half chamber are communicated with, described first commutation half chamber and second commutation, half chamber are positioned at two application of force chamber portions that the valve rod two ends can promote valve stem slides by two corresponding connections in application of force liquid road with described valve pocket respectively, and described fluid road is communicated with the chamber of commutating.
3. fluid pressure drive device as claimed in claim 2 is characterized in that: the end clamping of the rotor shaft of described commutation joint and rotor, and described rotor shaft is provided with draw-in groove, and described commutation joint is provided with the fixture block that snaps in described draw-in groove.
4. fluid pressure drive device as claimed in claim 3, it is characterized in that: described commutation liquid road comprises the first separatory hole, the second separatory hole and the commutation inlet opening that radially is arranged on the described commutation joint, and the described commutation inlet opening and the first separatory hole, the second separatory hole all are communicated with.
5. fluid pressure drive device as claimed in claim 4, it is characterized in that: be provided with two linings that are positioned at described commutation joint two ends in the described valve body, described commutation joint rotates and is installed between two linings, described commutation joint is provided with the axial hole that is communicated with two lining inner chambers, is communicated with by auxiliary liquid road between described lining inner chamber and the valve pocket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101446177A CN102168644B (en) | 2011-05-31 | 2011-05-31 | Hydraulic drive device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101446177A CN102168644B (en) | 2011-05-31 | 2011-05-31 | Hydraulic drive device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102168644A true CN102168644A (en) | 2011-08-31 |
| CN102168644B CN102168644B (en) | 2012-11-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101446177A Active CN102168644B (en) | 2011-05-31 | 2011-05-31 | Hydraulic drive device |
Country Status (1)
| Country | Link |
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| CN (1) | CN102168644B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5378363A (en) * | 1991-06-20 | 1995-01-03 | Christophe; Theophile | Fluid filter |
| EP0947230A1 (en) * | 1998-03-30 | 1999-10-06 | Tadayoshi Nagaoka | Filtering device |
| US5965029A (en) * | 1998-06-15 | 1999-10-12 | Simon; Jules A. | System and method for treating an oil gas well stream |
| CN2409389Y (en) * | 1999-10-21 | 2000-12-06 | 辽阳凯维阀业有限公司 | Three-position two-way piston valve |
| US20040245160A1 (en) * | 2003-06-04 | 2004-12-09 | Rudiger Lennartz | Back-wash filter |
| US20080000822A1 (en) * | 2004-09-29 | 2008-01-03 | Juhani Polon | Filter Apparatus for Filtering a Flowing Material |
| CN201161282Y (en) * | 2008-01-15 | 2008-12-10 | 济南汇和机电设备有限公司 | Automatic control device for rivet rotary-drag gun |
| CN201186186Y (en) * | 2008-01-30 | 2009-01-28 | 南通航海机械有限公司 | Full automatic backwashing filter |
| CN101890262A (en) * | 2010-07-29 | 2010-11-24 | 南通航海机械集团有限公司 | Full-automatic back washing filter |
| CN202125398U (en) * | 2011-05-31 | 2012-01-25 | 张家港圣美意机械有限公司 | Hydraulic driving device |
-
2011
- 2011-05-31 CN CN2011101446177A patent/CN102168644B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5378363A (en) * | 1991-06-20 | 1995-01-03 | Christophe; Theophile | Fluid filter |
| EP0947230A1 (en) * | 1998-03-30 | 1999-10-06 | Tadayoshi Nagaoka | Filtering device |
| US5965029A (en) * | 1998-06-15 | 1999-10-12 | Simon; Jules A. | System and method for treating an oil gas well stream |
| CN2409389Y (en) * | 1999-10-21 | 2000-12-06 | 辽阳凯维阀业有限公司 | Three-position two-way piston valve |
| US20040245160A1 (en) * | 2003-06-04 | 2004-12-09 | Rudiger Lennartz | Back-wash filter |
| US20080000822A1 (en) * | 2004-09-29 | 2008-01-03 | Juhani Polon | Filter Apparatus for Filtering a Flowing Material |
| CN201161282Y (en) * | 2008-01-15 | 2008-12-10 | 济南汇和机电设备有限公司 | Automatic control device for rivet rotary-drag gun |
| CN201186186Y (en) * | 2008-01-30 | 2009-01-28 | 南通航海机械有限公司 | Full automatic backwashing filter |
| CN101890262A (en) * | 2010-07-29 | 2010-11-24 | 南通航海机械集团有限公司 | Full-automatic back washing filter |
| CN202125398U (en) * | 2011-05-31 | 2012-01-25 | 张家港圣美意机械有限公司 | Hydraulic driving device |
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| Publication number | Publication date |
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| CN102168644B (en) | 2012-11-14 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Hydraulic drive Effective date of registration: 20220214 Granted publication date: 20121114 Pledgee: China Construction Bank Zhangjiagang branch Pledgor: Zhangjiagang Shengmeiyi Machinery Co.,Ltd. Registration number: Y2022980001507 |