CN101832409A - Electromagnetic type normally-closed three-position and four-way reversing valve - Google Patents
Electromagnetic type normally-closed three-position and four-way reversing valve Download PDFInfo
- Publication number
- CN101832409A CN101832409A CN 201010192473 CN201010192473A CN101832409A CN 101832409 A CN101832409 A CN 101832409A CN 201010192473 CN201010192473 CN 201010192473 CN 201010192473 A CN201010192473 A CN 201010192473A CN 101832409 A CN101832409 A CN 101832409A
- Authority
- CN
- China
- Prior art keywords
- electromagnetic
- returnning spring
- valve
- closed
- delivery channel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000009434 installation Methods 0.000 claims description 5
- 230000003044 adaptive effect Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 description 3
- 230000007774 longterm Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Images
Landscapes
- Magnetically Actuated Valves (AREA)
Abstract
The invention relates to an electromagnetic type normally-closed three-position and four-way reversing valve, comprising a valve body, a slide valve, an overflow system and an electromagnetic driver, wherein a valve core cavity is arranged in the valve body, the slide valve adapts to the valve core cavity, and an evacuation flow channel is also arranged in the valve body. The electromagnetic type normally-closed three-position and four-way reversing valve is characterized in that one end of the valve body is also provided with the electromagnetic driver, a first plane with an input flow channel is perpendicular to a second plane with an output flow channel, and the first plane with the input flow channel is perpendicular to a third plane with the evacuation flow channel. The invention has the advantage of greatly reducing the volume of the middle of the reserving valve, avoiding the problem that more spaces at both ends of the reserving valve are occupied in the scheme of installing the slide valves at both sides by adopting the mode of installing the electromagnetic driver at the single side, and being convenient for electricians to connect wires.
Description
Technical field
The invention belongs to the hydraulic system technical field, particularly relate to a kind of electromagnetic type normally-closed three-position and four-way reversing valve.
Background technique
At present in hydraulic system, conventional electromagnetic type three position four-way directional control valve, its guiding valve all is positioned at the both sides of three-position four-way valve, difference opening and closing by two side sliding valves produce suction, realize moving up and down of guiding valve, because all there is guiding valve at the valve body two ends, cause the accessories section of whole selector valve bigger; Existing electromagnetic type three position four-way directional control valve is because input duct, delivery channel and emptying runner all in a plane, cause the valve body middle part to need to arrange various pipelines, and volume is bigger.So cause, not have on the market at present appearance can long-term work under the situation of pressure environment greater than 30Mpa, flow can satisfy more than the 10L/min, the electromagnetic type normally-closed three-position and four-way reversing valve of diameter between 30-35mm.
Summary of the invention
The present invention provides a kind of electromagnetic type normally-closed three-position and four-way reversing valve for solving the technical problem that exists in the known technology, and it can realize the index of big pressure, big flow under the less situation of volume.
The technological scheme that the present invention takes for the technical problem that exists in the solution known technology is: a kind of electromagnetic type normally-closed three-position and four-way reversing valve, comprise valve body, guiding valve and electromagnetic driver, be provided with spool chamber in the valve body, guiding valve and spool chamber are adaptive, also be provided with the emptying runner in the valve body, delivery channel, input duct, it is characterized in that: also be provided with overflow system in the valve body, one end of valve body is provided with electromagnetic driver, first plane at input duct place and second Plane intersects at delivery channel place, the 3rd Plane intersects at first plane at input duct place and emptying runner place.
The present invention can also adopt following technological scheme: described electromagnetic driver comprises electromagnetic center bar, electromagnetic coil, Returnning spring and guiding valve, electromagnetic driver is provided with first electromagnetic coil and second electromagnetic coil in two ends up and down, electromagnetic driver links to each other with guiding valve by the electromagnetic center bar, and electromagnetic driver inside is provided with first Returnning spring and second Returnning spring.
Described electromagnetic driver also includes sleeve, the first Returnning spring block and the second Returnning spring block, described bush outer sleeve is equipped with first electromagnetic coil and second electromagnetic coil, guiding valve is positioned at sleeve and is slidingly connected with sleeve, guiding valve and electromagnetic center bar are connected, guiding valve is both sides and first Returnning spring and the second Returnning spring adjacency up and down, first Returnning spring and the first Returnning spring block adjacency, second Returnning spring and the second Returnning spring block adjacency, the first Returnning spring block and the second Returnning spring block and sleeve install by pin.
The upper end of described guiding valve is provided with counterbore, first Returnning spring be positioned at this counterbore and with the first Returnning spring block adjacency.
The upper end of the described second Returnning spring block is provided with counterbore, second Returnning spring be positioned at this counterbore and with the guiding valve adjacency.
The described second Returnning spring block is provided with through hole, and the electromagnetic center bar passes this with being slidingly connected in the hole and with the second Returnning spring block.
First plane at described input duct place is vertical with second plane at delivery channel place.
Described overflow system is installed in an end relative with electromagnetic driver of valve body, and input duct links to each other with overflow system.
Described overflow system and input duct coplane.
Described delivery channel comprises first delivery channel and second delivery channel; Described guiding valve middle part is provided with pillow block, and the position of pillow block is corresponding with the position of first delivery channel and second delivery channel; The end of guiding valve is provided with tapped hole, and guiding valve is threaded with the electromagnetic center bar.
Described emptying runner and delivery channel coplane.
Described emptying runner comprises the first emptying runner, the second emptying runner and the 3rd emptying runner, the first emptying runner links to each other with spool chamber with the second emptying runner, the 3rd emptying runner links to each other with the second emptying runner with the first emptying runner, the first emptying runner the axial position on the spool chamber at first delivery channel between an end of the installation electromagnetic driver of axial position on the spool chamber and valve body, the second emptying runner the axial position on the spool chamber at second delivery channel between the axial position on the spool chamber and spool chamber bottom.
Advantage and good effect that the present invention has are: after the present invention has adopted above technological scheme, with input duct, delivery channel, three kinds of pipelines of emptying runner separately, and adopted the grade separation layout structure, reduced the volume at selector valve middle part significantly, simultaneously, also adopted the mode of one-sided installation electromagnetic driver, avoided both sides to install in the scheme of guiding valve and taken the more problem of selector valve two end spaceses, simultaneously, also made things convenient for electrician's wiring.
Use the electromagnetic type normally-closed three-position and four-way reversing valve length 170mm of the technological scheme design in this patent, diameter 32mm, compact structure can normally be opened, close under the external pressure more than the 30Mpa, and peak rate of flow reaches 15L/min, and sealability is reliable.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention 1; Fig. 2 is the left view of Fig. 1; Fig. 3 is the structural representation of electromagnetic driver; Fig. 4 is the structural representation of the embodiment of the invention 2; Fig. 5 is the plan view of the embodiment of the invention 2; Fig. 6 is the A-A sectional view of Fig. 5; Fig. 7 is that to slide to the spool chamber lower position under the guiding valve of the present invention be working state schematic representation; Fig. 8 is the left view of Fig. 7; Fig. 9 is that to slide to the spool chamber upper position on the guiding valve of the present invention be working state schematic representation; Figure 10 is the left view of Fig. 9.
Among the figure: 1, first electromagnetic coil; 2, guiding valve; 3, second electromagnetic coil; 4, electromagnetic center bar; 5, valve body; 6, guiding valve; 7, overflow system; 8, input duct; 9, the second emptying runner; 10, first delivery channel; 11, second delivery channel; 12, the 3rd emptying runner; 13, spool chamber; 14, the first emptying runner; 15, sleeve; 16, first Returnning spring; 17, second Returnning spring; 18, the first Returnning spring block; 19, the second Returnning spring block.
Embodiment
For further understanding summary of the invention of the present invention, characteristics and effect, now exemplify following examples, and conjunction with figs. is described in detail as follows: embodiment 1: see also Fig. 1 to Fig. 3, a kind of electromagnetic type normally-closed three-position and four-way reversing valve, comprise valve body 5, guiding valve 6, overflow system 7 and electromagnetic driver, be provided with spool chamber 13 in the valve body, guiding valve and spool chamber are adaptive, also are provided with the emptying runner in the valve body.One end of valve body is provided with electromagnetic driver, first plane at input duct place and second Plane intersects at delivery channel place, the 3rd Plane intersects at first plane at input duct 8 places and emptying runner place.
Electromagnetic driver comprises electromagnetic center bar 4, electromagnetic coil, Returnning spring and guiding valve 2, electromagnetic driver is provided with first electromagnetic coil 1 and second electromagnetic coil 3 in two ends up and down, electromagnetic driver links to each other with guiding valve by the electromagnetic center bar, and electromagnetic driver inside is provided with first Returnning spring 16 and second Returnning spring 17.
Electromagnetic driver also includes sleeve 15, the first Returnning spring block 18 and the second Returnning spring block 19, described bush outer sleeve is equipped with first electromagnetic coil 1 and second electromagnetic coil 4, guiding valve is positioned at sleeve and is slidingly connected with sleeve, guiding valve and electromagnetic center bar are connected, guiding valve is both sides and first Returnning spring and the second Returnning spring adjacency up and down, first Returnning spring and the first Returnning spring block, 18 adjacency, second Returnning spring and the second Returnning spring block, 19 adjacency, the first Returnning spring block and the second Returnning spring block and sleeve install by pin.
The upper end of guiding valve 6 is provided with counterbore, first Returnning spring be positioned at this counterbore and with the first Returnning spring block adjacency.The upper end of the second Returnning spring block is provided with counterbore, second Returnning spring be positioned at this counterbore and with the guiding valve adjacency.The second Returnning spring block is provided with through hole, and the electromagnetic center bar passes this with being slidingly connected in the hole and with the second Returnning spring block.
First plane at input duct place is vertical with second plane at delivery channel place.
Overflow system is installed in an end relative with electromagnetic driver of valve body, and input duct links to each other with overflow system.
Overflow system and input duct coplane.
Delivery channel comprises first delivery channel 10 and second delivery channel 11; Described guiding valve middle part is provided with pillow block, and the position of pillow block is corresponding with the position of first delivery channel and second delivery channel; The end of guiding valve is provided with tapped hole, and guiding valve is threaded with the electromagnetic center bar.
Emptying runner and delivery channel coplane.
The emptying runner comprises the first emptying runner 14, the second emptying runner 9 and the 3rd emptying runner 12, the first emptying runner links to each other with spool chamber with the second emptying runner, the 3rd emptying runner links to each other with the second emptying runner with the first emptying runner, the first emptying runner the axial position on the spool chamber at first delivery channel between an end of the installation electromagnetic driver of axial position on the spool chamber and valve body, the second emptying runner the axial position on the spool chamber at second delivery channel between the axial position on the spool chamber and spool chamber bottom.
Embodiment 2: see also Fig. 4 to Fig. 6, a kind of electromagnetic type normally-closed three-position and four-way reversing valve comprises valve body 5, guiding valve 6, overflow system 7 and electromagnetic driver, is provided with spool chamber 13 in the valve body, and guiding valve and spool chamber are adaptive, also are provided with the emptying runner in the valve body.
One end of valve body is provided with electromagnetic driver, and first plane at input duct place and second plane at delivery channel place are hexagonal angle, and the 3rd plane at first plane at input duct 8 places and emptying runner place is hexagonal angle.
Electromagnetic driver comprises electromagnetic center bar 4, electromagnetic coil, Returnning spring and guiding valve 2, electromagnetic driver is provided with first electromagnetic coil 1 and second electromagnetic coil 3 in two ends up and down, electromagnetic driver links to each other with guiding valve by the electromagnetic center bar, and electromagnetic driver inside is provided with first Returnning spring 16 and second Returnning spring 17.
Electromagnetic driver also includes sleeve, the first Returnning spring block and the second Returnning spring block, described bush outer sleeve is equipped with first electromagnetic coil and second electromagnetic coil, guiding valve is positioned at sleeve and is slidingly connected with sleeve, guiding valve and electromagnetic center bar are connected, guiding valve is both sides and first Returnning spring and the second Returnning spring adjacency up and down, first Returnning spring and the first Returnning spring block, 18 adjacency, second Returnning spring and the second Returnning spring block, 19 adjacency, the first Returnning spring block and the second Returnning spring block and sleeve install by pin.
The upper end of guiding valve is provided with counterbore, first Returnning spring be positioned at this counterbore and with the first Returnning spring block adjacency.The upper end of the second Returnning spring block is provided with counterbore, second Returnning spring be positioned at this counterbore and with the guiding valve adjacency.The second Returnning spring block is provided with through hole, and the electromagnetic center bar passes this with being slidingly connected in the hole and with the second Returnning spring block.
Overflow system is installed in an end relative with electromagnetic driver of valve body, and input duct links to each other with overflow system, overflow system and input duct coplane.
Delivery channel comprises first delivery channel 10 and second delivery channel 11; Described guiding valve middle part is provided with pillow block, and the position of pillow block is corresponding with the position of first delivery channel and second delivery channel; The end of guiding valve is provided with tapped hole, and guiding valve is threaded with the electromagnetic center bar.
The emptying runner comprises the first emptying runner 14, the second emptying runner 9 and the 3rd emptying runner 12, the first emptying runner links to each other with spool chamber with the second emptying runner, the 3rd emptying runner links to each other with the second emptying runner with the first emptying runner, the first emptying runner the axial position on the spool chamber at first delivery channel between an end of the installation electromagnetic driver of axial position on the spool chamber and valve body, the second emptying runner the axial position on the spool chamber at second delivery channel between the axial position on the spool chamber and spool chamber bottom.
Operating principle of the present invention is: see also Fig. 7 to Figure 10, when the electromagnetic coil no electric circuit, electromagnetic center bar 4 is motionless, when guiding valve 6 is positioned at initial position, closes all runner through holes; When electromagnetic coil is switched on, guiding valve makes under the effect of electromagnetic force on the electromagnetic center bar, lower slider, the electromagnetic center bar drive guiding valve in spool chamber on, lower slider, realize connection or disconnection between each runner: when second electromagnetic coil is switched on, sleeve Lower Half in second electromagnetic coil has magnetic, its to guiding valve at the spring force of electromagnetic force greater than second Returnning spring, guiding valve drives the electromagnetic center bar to lower slider, the electromagnetic center bar drive guiding valve in spool chamber to lower slider, when guiding valve slides into valve body lower portion, input duct 8 is communicated with first delivery channel 10, and second delivery channel 11 is communicated with the first emptying runner 14 simultaneously; When first electromagnetic coil is switched on, sleeve Lower Half in first electromagnetic coil has magnetic, its to guiding valve at the spring force of electromagnetic force greater than first Returnning spring, guiding valve drives the electromagnetic center bar to lower slider, the electromagnetic center bar drives guiding valve and upwards slides in spool chamber, when guiding valve slided into valve body top, input duct 8 was communicated with second delivery channel 11, and first delivery channel 10 is communicated with the second emptying runner 9 simultaneously.
Although in conjunction with the accompanying drawings the preferred embodiments of the present invention are described above; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment only is schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present invention; not breaking away under the scope situation that aim of the present invention and claim protect, can also make a lot of forms, these all belong within protection scope of the present invention.
Claims (12)
1. electromagnetic type normally-closed three-position and four-way reversing valve, comprise valve body, guiding valve and electromagnetic driver, be provided with spool chamber in the valve body, guiding valve and spool chamber are adaptive, also be provided with emptying runner, delivery channel, input duct in the valve body, it is characterized in that: an end of valve body is provided with electromagnetic driver, first plane at input duct place and second Plane intersects at delivery channel place, the 3rd Plane intersects at first plane at input duct place and emptying runner place.
2. electromagnetic type normally-closed three-position and four-way reversing valve according to claim 1, it is characterized in that: described electromagnetic driver comprises electromagnetic center bar, electromagnetic coil, Returnning spring and guiding valve, electromagnetic driver is provided with first electromagnetic coil and second electromagnetic coil in two ends up and down, electromagnetic driver links to each other with guiding valve by the electromagnetic center bar, and electromagnetic driver inside is provided with first Returnning spring and second Returnning spring.
3. electromagnetic type normally-closed three-position and four-way reversing valve according to claim 2, it is characterized in that: also include guiding valve in the described electromagnetic driver, sleeve, the first Returnning spring block and the second Returnning spring block, described bush outer sleeve is equipped with first electromagnetic coil and second electromagnetic coil, guiding valve is positioned at sleeve and is slidingly connected with sleeve, guiding valve and electromagnetic center bar are connected, guiding valve is both sides and first Returnning spring and the second Returnning spring adjacency up and down, first Returnning spring and the first Returnning spring block adjacency, second Returnning spring and the second Returnning spring block adjacency, the first Returnning spring block and the second Returnning spring block and sleeve install.
4. electromagnetic type normally-closed three-position and four-way reversing valve according to claim 3 is characterized in that: the upper end of described guiding valve is provided with counterbore, first Returnning spring be positioned at this counterbore and with the first Returnning spring block adjacency.
5. electromagnetic type normally-closed three-position and four-way reversing valve according to claim 3 is characterized in that: the upper end of the described second Returnning spring block is provided with counterbore, second Returnning spring be positioned at this counterbore and with the guiding valve adjacency.
6. according to claim 3 or 5 described electromagnetic type normally-closed three-position and four-way reversing valves, it is characterized in that: the described second Returnning spring block is provided with through hole, and the electromagnetic center bar passes this with being slidingly connected in the hole and with the second Returnning spring block.
7. electromagnetic type normally-closed three-position and four-way reversing valve according to claim 1 is characterized in that: first plane at described input duct place is vertical with second plane at delivery channel place.
8. electromagnetic type normally-closed three-position and four-way reversing valve according to claim 1 is characterized in that: also be provided with overflow system in the valve body, described overflow system is installed in an end relative with electromagnetic driver of valve body, and input duct links to each other with overflow system.
9. according to claim 1 or 8 described electromagnetic type normally-closed three-position and four-way reversing valves, it is characterized in that: described overflow system and input duct coplane.
10. electromagnetic type normally-closed three-position and four-way reversing valve according to claim 1 is characterized in that: described delivery channel comprises first delivery channel and second delivery channel; Described guiding valve middle part is provided with pillow block, and the position of pillow block is corresponding with the position of first delivery channel and second delivery channel; The end of guiding valve is provided with tapped hole, and guiding valve is threaded with the electromagnetic center bar.
11. electromagnetic type normally-closed three-position and four-way reversing valve according to claim 1 is characterized in that: described emptying runner and delivery channel coplane.
12. according to claim 1 or 11 described electromagnetic type normally-closed three-position and four-way reversing valves, it is characterized in that: described emptying runner comprises the first emptying runner, the second emptying runner and the 3rd emptying runner, the first emptying runner links to each other with spool chamber with the second emptying runner, the 3rd emptying runner links to each other with the second emptying runner with the first emptying runner, the first emptying runner the axial position on the spool chamber at first delivery channel between an end of the installation electromagnetic driver of axial position on the spool chamber and valve body, the second emptying runner the axial position on the spool chamber at second delivery channel between the axial position on the spool chamber and spool chamber bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101924738A CN101832409B (en) | 2010-06-07 | 2010-06-07 | Electromagnetic type normally-closed three-position and four-way reversing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101924738A CN101832409B (en) | 2010-06-07 | 2010-06-07 | Electromagnetic type normally-closed three-position and four-way reversing valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101832409A true CN101832409A (en) | 2010-09-15 |
| CN101832409B CN101832409B (en) | 2012-07-11 |
Family
ID=42716577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101924738A Expired - Fee Related CN101832409B (en) | 2010-06-07 | 2010-06-07 | Electromagnetic type normally-closed three-position and four-way reversing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101832409B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110131914A (en) * | 2018-02-08 | 2019-08-16 | 浙江盾安机械有限公司 | Four-way valve and air-conditioning system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4361309A (en) * | 1980-06-23 | 1982-11-30 | Niipondenso Co., Ltd. | Electromagnetic actuator |
| JPH10205640A (en) * | 1998-02-02 | 1998-08-04 | Kenji Masuda | Linear motor |
| US20010003277A1 (en) * | 1999-12-09 | 2001-06-14 | Itami Works Of Sumitomo Electric Industries, Ltd. | Electromagnetic actuator and valve-open-close mechanism |
| CN2592932Y (en) * | 2002-12-05 | 2003-12-17 | 仲伟胜 | Three-position four-way hydraulic electromagnetic change valve |
| CN2721942Y (en) * | 2004-08-18 | 2005-08-31 | 象山液压气动设备有限公司 | Superhigh double-position and four-way solenoid reversing valve |
| CN201739562U (en) * | 2010-06-07 | 2011-02-09 | 中国海洋石油总公司 | Electromagnetic type normally closed three-phase four-way reversing valve |
-
2010
- 2010-06-07 CN CN2010101924738A patent/CN101832409B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4361309A (en) * | 1980-06-23 | 1982-11-30 | Niipondenso Co., Ltd. | Electromagnetic actuator |
| JPH10205640A (en) * | 1998-02-02 | 1998-08-04 | Kenji Masuda | Linear motor |
| US20010003277A1 (en) * | 1999-12-09 | 2001-06-14 | Itami Works Of Sumitomo Electric Industries, Ltd. | Electromagnetic actuator and valve-open-close mechanism |
| CN2592932Y (en) * | 2002-12-05 | 2003-12-17 | 仲伟胜 | Three-position four-way hydraulic electromagnetic change valve |
| CN2721942Y (en) * | 2004-08-18 | 2005-08-31 | 象山液压气动设备有限公司 | Superhigh double-position and four-way solenoid reversing valve |
| CN201739562U (en) * | 2010-06-07 | 2011-02-09 | 中国海洋石油总公司 | Electromagnetic type normally closed three-phase four-way reversing valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110131914A (en) * | 2018-02-08 | 2019-08-16 | 浙江盾安机械有限公司 | Four-way valve and air-conditioning system |
| CN110131914B (en) * | 2018-02-08 | 2021-07-20 | 浙江盾安机械有限公司 | Four-way valve and air conditioning system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101832409B (en) | 2012-07-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202561124U (en) | Dual pilot-type electric control reversing valve | |
| CN101832409B (en) | Electromagnetic type normally-closed three-position and four-way reversing valve | |
| CN201739562U (en) | Electromagnetic type normally closed three-phase four-way reversing valve | |
| CN202732523U (en) | Pilot valve for loading machine | |
| CN201615104U (en) | Three-position four-way solenoid directional valve | |
| CN201650911U (en) | Two-position three-way pneumatic reversing valve | |
| CN202790680U (en) | Electronic controlled proportional multi-way valve | |
| CN201627770U (en) | Mechanical combination valve | |
| CN104235095A (en) | Dual-control multi-position reversing hydraulic device | |
| CN204083373U (en) | A kind of multi-way valve with off-load protection | |
| CN202531519U (en) | Electro-hydraulic multi-way directional valve | |
| CN202531516U (en) | Electro-hydraulic multidirectional reversing valve with oil guiding path in oil-filling valve block | |
| CN1300499C (en) | Ratio pressure difference control valve | |
| CN203488466U (en) | Dual-control multi-position reversing hydraulic device | |
| CN105110192A (en) | Confluence control device of hydraulic crane | |
| CN201963630U (en) | Hydraulic control reversing device for controlling running direction of bidirectional hydraulic cylinder | |
| CN202531520U (en) | Filling valve block provided with pilot oil line | |
| CN202531521U (en) | Electro-hydraulic multi-way directional valve with flow collecting valve disc | |
| CN204127397U (en) | A kind of combined pressure recuperation valve | |
| CN102734245B (en) | Preferential-type variable steering control valve | |
| CN203670893U (en) | Multi-pipeline conduction switching mechanism | |
| CN111306333B (en) | Safety valve | |
| CN101660549A (en) | Composite high pressure valve in closed system | |
| CN223708706U (en) | Double-control multi-way valve structure | |
| CN105673886A (en) | Force reducing cushion self-closing valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120711 Termination date: 20160607 |