CN203176031U - Internal-control type valve core rotating type four-way reversing valve with two degrees of freedom - Google Patents
Internal-control type valve core rotating type four-way reversing valve with two degrees of freedom Download PDFInfo
- Publication number
- CN203176031U CN203176031U CN 201320031299 CN201320031299U CN203176031U CN 203176031 U CN203176031 U CN 203176031U CN 201320031299 CN201320031299 CN 201320031299 CN 201320031299 U CN201320031299 U CN 201320031299U CN 203176031 U CN203176031 U CN 203176031U
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- boss
- spool
- groove
- chamber
- valve pocket
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- 239000012530 fluid Substances 0.000 claims description 33
- 239000000945 filler Substances 0.000 claims description 12
- 239000002828 fuel tank Substances 0.000 claims description 12
- 230000009977 dual effect Effects 0.000 claims description 11
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 abstract description 11
- 239000010720 hydraulic oil Substances 0.000 description 8
- 239000003921 oil Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000003373 anti-fouling effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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- Multiple-Way Valves (AREA)
Abstract
The utility model discloses an internal-control type valve core rotating type four-way reversing valve with two degrees of freedom. According to the internal-control type valve core rotating type four-way reversing valve with the two degrees of freedom, valve cores comprise a first valve core and a second valve core, a first boss is arranged on the first valve core, and a second boss, a third boss, a fourth boss, a fifth boss and a sixth boss are arranged on the second valve core. The first boss, the second boss, the third boss, the fourth boss, the fifth boss and the sixth boss are sequentially arranged in the direction from a first end cap to a second end cap. A cavity is formed between every two adjacent bosses, and a corresponding oil port is formed in the valve body wall where each cavity is formed. An axial through hole is formed in the sixth boss. A spring is arranged in the cavity formed between the first boss and the second boss, the outer end surface of the sixth boss is tightly contacted with the second end cap, and corresponding grooves are formed in the end surface of the third boss and the end surface of the fourth boss at intervals in the circumferential direction. The internal-control type valve core rotating type four-way reversing valve with two degrees of freedom has two freedom degrees including valve core rotation and valve core axial movement, and can independently control the working frequency and amplitude displacement of an executing mechanism.
Description
Technical field
The utility model relates to a kind of hydraulicdirectional control valve, is mainly used in realizing in the frequency of okperation of actuator and the field of engineering technology that displacement amplitude can independently be controlled.
Background technique
Rotary valve refers to realize by the rotation of spool the valve of oil circuit break-make and commutation.Existing rotary valve only has the rotary freedom of a spool basically, cause rotary valve that the frequency of okperation of actuator and the control of displacement amplitude are coupled, namely can only control frequency of okperation and the amplitude displacement of actuator by the spool rotary freedom simultaneously, yet require in many field of engineering technology independent control is carried out in frequency of okperation and the amplitude displacement of actuator.
The model utility content
The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of internal control formula dual free dimension spool rotary type four-way selector valve that carries out independent control applicable to the high-pressure high-flow occasion, to the frequency of okperation of actuator and amplitude displacement is provided.
For achieving the above object, the technological scheme that the utility model is taked is: the utility model internal control formula dual free dimension spool rotary type four-way selector valve comprises valve body, valve pocket, spool, first end cap and second end cap, wherein, described spool is made of first spool and second spool, be provided with first boss at first spool, be provided with second boss at second spool, the 3rd boss, the 4th boss, the 5th boss and the 6th boss, first boss, second boss, the 3rd boss, the 4th boss, the 5th boss, the 6th boss is arranged to the direction of second end cap successively along first end cap;
First end of first spool runs through and stretches out first end cap, first end of described first spool or be connected with the main shaft of stepper motor by coupling, and perhaps the rotor with the rotation proportion electro-magnet is connected; Second end of first spool is relative with first end of second spool and form first chamber between first boss and second boss, has the drain tap that first chamber is communicated with fuel tank on the valve body wall at place, first chamber; Be provided with a spring in first chamber, second end of first spool and first end of second spool all stretch in the described spring, and an end of described spring is fixedlyed connected with second spool, and the other end of described spring is fixedlyed connected with first spool;
The exterior edge face of the 6th boss closely contacts with second end cap, described the 6th boss is provided with axial hole, the 5th chamber is the cavity that forms between the 5th boss and the 6th boss, have the 3rd hydraulic fluid port that the 5th chamber is communicated with oil supply system on the valve body wall at place, the 5th chamber, second spool is provided with the radial direction through hole that is communicated with the 3rd hydraulic fluid port in the position at place, the 5th chamber, and described radial direction through hole is communicated with axial hole;
Form second chamber between second boss and the 3rd boss, have first return opening that second chamber is communicated with fuel tank on the valve body wall at place, second chamber; Form the 3rd chamber between the 3rd boss and the 4th boss, have the P filler opening that the 3rd chamber is communicated with oil supply system on the valve body wall at place, the 3rd chamber; Form the 4th chamber between the 4th boss and the 5th boss, have second return opening that the 4th chamber is communicated with fuel tank on the valve body at place, the 4th chamber;
Valve body wall at the 3rd boss place has the A hydraulic fluid port for control actuator, and the valve body wall at the 4th boss place has the B hydraulic fluid port for control actuator;
Along the circumferential direction the compartment of terrain has first groove that first return opening is communicated with the A hydraulic fluid port on a side end face of the 3rd boss, and along the circumferential direction the compartment of terrain has second groove that the P filler opening is communicated with the A hydraulic fluid port on the opposite side end face of the 3rd boss; Along the circumferential direction the compartment of terrain has the 3rd groove that the P filler opening is communicated with the B hydraulic fluid port on a side end face of the 4th boss, and along the circumferential direction the compartment of terrain has the 4th groove that second return opening is communicated with the B hydraulic fluid port on the opposite side end face of the 4th boss; First groove is overlapped with the corresponding projection of second groove on the projection plane vertical with the medial axis of second spool, the 3rd groove is overlapped with the corresponding projection of the 4th groove on the projection plane vertical with the medial axis of second spool, and second groove along the circumferential direction alternately is staggeredly arranged with the projection of the 3rd groove on the projection plane vertical with the medial axis of second spool;
Described valve pocket has the corresponding first valve pocket window, the second valve pocket window, the 3rd valve pocket window and the 4th valve pocket window in the position at first groove, second groove, the 3rd groove and the 4th groove place.The first valve pocket window is overlapped with the corresponding projection of the 4th valve pocket window on the projection plane vertical with the medial axis of second spool, the described second valve pocket window is overlapped with the corresponding projection of the 3rd valve pocket window on the projection plane vertical with the medial axis of second spool, and the projection on the projection plane vertical with the medial axis of second spool along the circumferential direction alternately is staggeredly arranged the described first valve pocket window with the second valve pocket window.
Further, first groove described in the utility model and second groove are along evenly distributing on the circumferencial direction of the end face of described three boss, and the 3rd groove and the 4th groove are along evenly distributing on the circumferencial direction of the end face of described the 4th boss.
Further, the first valve pocket window described in the utility model, the second valve pocket window, the 3rd valve pocket window and the 4th valve pocket window are separately respectively along evenly distributing on the circumferencial direction of described valve pocket.
Compared with prior art, the beneficial effects of the utility model are: have spool rotation and spool and move axially two degrees of freedom, can carry out independent control to frequency of okperation and the amplitude displacement of actuator, be that stepper motor drives the spool rotation, and then the frequency of okperation of control actuator, the comprehensive function control valve mandrel of active hydraulic coupling and spring preset power is to movement, and then the amplitude displacement of control actuator.
Description of drawings
Fig. 1 is the internal structure schematic representation of the utility model internal control formula dual free dimension spool rotary type four-way selector valve, and wherein valve body, valve pocket and end cap partly are longitudinal section, center sectional views;
Fig. 2 is the three-dimensional structure schematic representation that the valve body of the utility model internal control formula dual free dimension spool rotary type four-way selector valve is cut open along the longitudinal section, center of valve body;
Fig. 3 is the three-dimensional structure schematic representation of valve pocket 2;
Fig. 4 is the three-dimensional structure schematic representation of first spool 3;
Fig. 5 is the three-dimensional structure schematic representation of second spool 4;
Fig. 6 is the enlarged view of A portion when the utility model selector valve is in P → B working state (i.e. first working state) among Fig. 1;
Fig. 7 is the enlarged view of A portion when the utility model internal control formula dual free dimension spool rotary type four-way selector valve is in P → A working state (i.e. second working state) among Fig. 1;
Fig. 8 is second groove and the projection position distribution relation schematic representation of the 3rd groove on the projection plane vertical with the medial axis of second spool;
Among the figure, 1-valve body; 2-valve pocket; 3-the first spool; 4-the second spool; 5-the first end cap; 6-the second end cap; 7-the first boss; 8-the second boss; 9-the three boss; 10-the four boss; 11-the five boss; 12-the six boss; First end of 13-the first spool; Second end of 14-the first spool; First end of 15-the second spool; 16-spring; One end of 17-spring; The other end of 18-spring; 19-the first chamber; 20-the second chamber; 21-the three chamber; 22-the four chamber; 23-the five chamber; 24-axial hole; 25-radial direction through hole; 26-the three hydraulic fluid port; 27-return opening; 28-P filler opening; 29-return opening; 30-A hydraulic fluid port; 31-B hydraulic fluid port; 32-the first groove; 33-the second groove; 34-the three groove; 35-the four groove; 36-the first valve pocket window; 37-the second valve pocket window; 38-the three valve pocket window; 39-the four valve pocket window; 40-drain tap.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
To shown in Figure 5, the utility model internal control formula dual free dimension spool rotary type four-way selector valve mainly comprises valve body 1, valve pocket 2, first spool 3, second spool 4, first end cap 5 and second end cap 6 as Fig. 1.First spool 3 and second spool 4 place in the chamber of valve body 1, and first end cap 5 and second end cap 6 are installed together at end and the valve body 1 at the two ends of valve body 1 respectively.As Fig. 1, Fig. 4 and shown in Figure 5, be provided with first boss 7 at first spool 3, be provided with second boss 8, the 3rd boss 9, the 4th boss 10, the 5th boss 11 and the 6th boss 12 at second spool 4, and first boss 7, second boss 8, the 3rd boss 9, the 4th boss 10, the 5th boss 11 and the 6th boss 12 are arranged successively on from first end cap 5 to the direction of second end cap 6.First end 13 of first spool runs through and stretches out first end cap 5, first end 13 of first spool can be connected with the stepper motor main shaft by coupling, drive spool and realize rotatablely moving of spool by the stepper motor main shaft, form open-loop control system, simple in structure, easy to operate, high frequency performance is good, and antifouling property is good.As another kind of mode of execution of the present utility model, first end 13 of first spool also can be connected by the rotor of coupling with the rotation proportion electro-magnet, by the rotation proportion electro-magnet the rotor banding movable valve plug and realize rotatablely moving of spool, and the feedback control of adding the angular displacement of angle transducer realization spool, form closed loop control system, workload-adaptability is strong, improves control accuracy and stability.
Shown in Fig. 1, first chamber 19 is the cavity that forms between first boss 7 and second boss 8, have the drain tap 40 that first chamber 19 is communicated with fuel tank on the wall of the valve body 1 at 19 places, first chamber, the leakage oil that enters into first chamber 19 can flow back to fuel tank by drain tap 40.Spring 16 is positioned at first chamber 19, second end 14 of first spool and first end 15 of second spool stretch in the spring 16, and second end 14 of first spool is relative with first end 15 of second spool, one end 17 of spring is fixedlyed connected with second spool 4, and the other end 18 of spring is fixedlyed connected with first spool 3.Second chamber 20 is the cavity that forms between second boss 8 and the 3rd boss 9, has the return opening 27 that second chamber 20 is communicated with fuel tank on the wall of the valve body 1 at 20 places, second chamber.The 3rd chamber 21 is the cavity that forms between the 3rd boss 9 and the 4th boss 10, has the P filler opening 28 that the 3rd chamber 21 is communicated with oil supply system on the wall of the valve body 1 at 21 places, the 3rd chamber.The 4th chamber 22 is the cavity that forms between the 4th boss 10 and the 5th boss 11, has the return opening 29 that the 4th chamber 22 is communicated with fuel tank on the wall of the valve body 1 at 22 places, the 4th chamber.The 5th chamber 23 is the cavity that forms between the 5th boss 11 and the 6th boss 12, have the 3rd hydraulic fluid port 26, the second spools 4 that the 5th chamber 23 is communicated with oil supply system on the wall of the valve body 1 at 23 places, the 5th chamber and be provided with the radial direction through hole 25 that is communicated with the 3rd hydraulic fluid port 26 in the position at 23 places, the 5th chamber.Compare the 6th boss 12 the most close second end caps 6 with other boss.The 6th boss 12 is provided with axial hole 24, and radial direction through hole 25 is communicated with axial hole 24.
As Fig. 1, Fig. 2 and shown in Figure 5, have A hydraulic fluid port 30 for control actuator at the wall of the valve body 1 at the 3rd boss 9 places, have B hydraulic fluid port 31 for control actuator at the wall of the valve body 1 at the 4th boss 10 places.Along the circumferential direction the compartment of terrain has first groove 32 that return opening 27 is communicated with A hydraulic fluid port 30 on a side end face of the 3rd boss 9, and along the circumferential direction the compartment of terrain has second groove 33 that P filler opening 28 is communicated with A hydraulic fluid port 30 on the opposite side end face of the 3rd boss 9.Along the circumferential direction the compartment of terrain has the 3rd groove 34 that P filler opening 28 is communicated with B hydraulic fluid port 31 on a side end face of the 4th boss 10, and along the circumferential direction the compartment of terrain has the 4th groove 35 that return opening 29 is communicated with B hydraulic fluid port 31 on the opposite side end face of the 4th boss 10.
As shown in Figure 8, second groove 33 on the 3rd boss 9 along the circumferential direction alternately is staggeredly arranged with the projection of the 3rd groove 34 on the projection plane vertical with the medial axis of second spool 4 on the 4th boss 10.First groove 32 on the 3rd boss 9 is overlapped with the corresponding projection of the 4th groove 35 on the projection plane vertical with the medial axis of second spool 4 with three groove 34 of the second corresponding groove 33 on overlapped the 4th boss 10 of the projection on the projection plane vertical with the medial axis of second spool 4.
As preferred version of the present utility model, first groove 32 on the 3rd boss 9 is along evenly distributing on the circumferencial direction of the end face of the 3rd boss 9, and second groove 33 on the 3rd boss 9 is along evenly distributing on the circumferencial direction of the end face of the 3rd boss 9; The 3rd groove 34 on the 4th boss 10 is along evenly distributing on the circumferencial direction of the end face of the 4th boss 10, and the 4th groove 35 on the 4th boss 10 is along evenly distributing on the circumferencial direction of the end face of the 4th boss 10.
As shown in figures 1 and 3, valve pocket 2 has the corresponding first valve pocket window 36 in the position at first groove, 32 places, valve pocket 2 has the corresponding second valve pocket window 37 in the position at second groove, 33 places, valve pocket 2 has corresponding the 3rd valve pocket window 38 in the position at the 3rd groove 34 places, and valve pocket 2 has corresponding the 4th valve pocket window 39 in the position at the 4th groove 35 places.The first valve pocket window 36 on the valve pocket 2 is overlapped with the corresponding projection of the 4th valve pocket window 39 on the projection plane vertical with the medial axis of second spool 4, the second valve pocket window 37 on the valve pocket 2 is overlapped with the corresponding projection of the 3rd valve pocket window 38 on the projection plane vertical with the medial axis of second spool 4, and the projection on the projection plane vertical with the medial axis of second spool 4 along the circumferential direction alternately is staggeredly arranged the first valve pocket window 36 on the valve pocket 2 with the second valve pocket window 37.
As preferred version of the present utility model, the first valve pocket window 36 on the valve pocket 2 is along evenly distributing on the circumferencial direction of valve pocket 2, and the second valve pocket window 37 on the valve pocket 2 distributes along the circumference of valve pocket 2 is even.The 3rd valve pocket window 38 on the valve pocket 2 is along evenly distributing on the circumferencial direction of valve pocket 2, and the 4th valve pocket window 39 on the valve pocket 2 is along evenly distributing on the circumferencial direction of valve pocket 2.
The working procedure of the utility model internal control formula dual free dimension spool rotary type four-way selector valve is: 3 rotations of first spool, drive 4 rotations of second spool by spring 16, when second spool 4 rotated to as shown in Figure 6 position, the utility model selector valve was in P → B working state (i.e. first working state).At this moment, first groove 32 is communicated with the first valve pocket window 36, and the 3rd groove 34 is communicated with the 3rd valve pocket window 38 simultaneously.Flow to three groove 34 and the three valve pocket window 38 of hydraulic oil by being on state in the 3rd chamber 21 by P filler opening 28, enter actuator through B hydraulic fluid port 31; Simultaneously, the hydraulic oil that flows out from the actuator A hydraulic fluid port 30 of flowing through, the hydraulic oil that first groove 32 by being on state and the first valve pocket window 36 flow in 20, the second chambeies 20, second chamber flows back to fuel tank through return opening 27.When second spool 4 rotated to as shown in Figure 7 position, the utility model selector valve was in P → A working state (i.e. second working state).At this moment, second groove 33 is communicated with the second valve pocket window 37, and the 4th groove 35 is communicated with the 4th valve pocket window 39 simultaneously.Flow to second groove 33 and the second valve pocket window 37 of hydraulic oil by being on state in the 3rd chamber 21 by P filler opening 28, enter actuator through A hydraulic fluid port 30; Simultaneously, the hydraulic oil that flows out from the actuator B hydraulic fluid port 31 of flowing through, the hydraulic oil that the 4th groove 35 by being on state and the 4th valve pocket window 39 flow in 22, the four chambeies 22, the 4th chamber flows back to fuel tank through return opening 29.Rotation along with first spool 3 and second spool 4, the utility model selector valve periodically alternately is in first working state and second working state, the utility model four-way change-over valve area of passage makes valve port opening change continuously according to evenly distributing on---little---the greatly general orientation thus.In first spool 3 and 4 rotations of second spool, the hydraulic oil that oil supply system provides enters the 5th chamber 23 by the 3rd hydraulic fluid port 26, through radial direction through hole 25 and axial hole 26, act on and produce the power of surging on the bottom surface of second end cap 6, if when making the power of surging greater than the preset power of spring 16, second spool 4 begins to take place axial displacement so.If the passing ratio reduction valve is regulated the pressure size of the hydraulic oil that enters the 3rd hydraulic fluid port 26, then can control the size of the axial displacement of second spool 4.
The content that this specification implements to state is enumerating the way of realization of model utility design; concrete mode shown in protection domain of the present utility model should not be regarded as being confined to implement, and should be involved in those skilled in the art according to the utility model design the equivalent technologies mode that can think deeply.
Claims (3)
1. internal control formula dual free dimension spool rotary type four-way selector valve, comprise valve body, valve pocket, spool, first end cap and second end cap, it is characterized in that: described spool is made of first spool and second spool, be provided with first boss at first spool, be provided with second boss, the 3rd boss, the 4th boss, the 5th boss and the 6th boss at second spool, first boss, second boss, the 3rd boss, the 4th boss, the 5th boss, the 6th boss are arranged to the direction of second end cap successively along first end cap;
First end of first spool runs through and stretches out first end cap, first end of described first spool or be connected with the main shaft of stepper motor by coupling, and perhaps the rotor with the rotation proportion electro-magnet is connected; Second end of first spool is relative with first end of second spool and form first chamber between first boss and second boss, has the drain tap that first chamber is communicated with fuel tank on the valve body wall at place, first chamber; Be provided with a spring in first chamber, second end of first spool and first end of second spool all stretch in the described spring, and an end of described spring is fixedlyed connected with second spool, and the other end of described spring is fixedlyed connected with first spool;
The exterior edge face of the 6th boss closely contacts with second end cap, described the 6th boss is provided with axial hole, the 5th chamber is the cavity that forms between the 5th boss and the 6th boss, have the 3rd hydraulic fluid port that the 5th chamber is communicated with oil supply system on the valve body wall at place, the 5th chamber, second spool is provided with the radial direction through hole that is communicated with the 3rd hydraulic fluid port in the position at place, the 5th chamber, and described radial direction through hole is communicated with axial hole;
Form second chamber between second boss and the 3rd boss, have first return opening that second chamber is communicated with fuel tank on the valve body wall at place, second chamber; Form the 3rd chamber between the 3rd boss and the 4th boss, have the P filler opening that the 3rd chamber is communicated with oil supply system on the valve body wall at place, the 3rd chamber; Form the 4th chamber between the 4th boss and the 5th boss, have second return opening that the 4th chamber is communicated with fuel tank on the valve body at place, the 4th chamber;
Valve body wall at the 3rd boss place has the A hydraulic fluid port for control actuator, and the valve body wall at the 4th boss place has the B hydraulic fluid port for control actuator;
Along the circumferential direction the compartment of terrain has first groove that first return opening is communicated with the A hydraulic fluid port on a side end face of the 3rd boss, and along the circumferential direction the compartment of terrain has second groove that the P filler opening is communicated with the A hydraulic fluid port on the opposite side end face of the 3rd boss; Along the circumferential direction the compartment of terrain has the 3rd groove that the P filler opening is communicated with the B hydraulic fluid port on a side end face of the 4th boss, and along the circumferential direction the compartment of terrain has the 4th groove that second return opening is communicated with the B hydraulic fluid port on the opposite side end face of the 4th boss; First groove is overlapped with the corresponding projection of second groove on the projection plane vertical with the medial axis of second spool, the 3rd groove is overlapped with the corresponding projection of the 4th groove on the projection plane vertical with the medial axis of second spool, and second groove along the circumferential direction alternately is staggeredly arranged with the projection of the 3rd groove on the projection plane vertical with the medial axis of second spool;
Described valve pocket has the corresponding first valve pocket window, the second valve pocket window, the 3rd valve pocket window and the 4th valve pocket window in the position at first groove, second groove, the 3rd groove and the 4th groove place;
The first valve pocket window is overlapped with the corresponding projection of the 4th valve pocket window on the projection plane vertical with the medial axis of second spool, the described second valve pocket window is overlapped with the corresponding projection of the 3rd valve pocket window on the projection plane vertical with the medial axis of second spool, and the projection on the projection plane vertical with the medial axis of second spool along the circumferential direction alternately is staggeredly arranged the described first valve pocket window with the second valve pocket window.
2. internal control formula dual free dimension spool rotary type four-way selector valve according to claim 1, it is characterized in that: described first groove and second groove are along evenly distributing on the circumferencial direction of the end face of described three boss, and the 3rd groove and the 4th groove are along evenly distributing on the circumferencial direction of the end face of described the 4th boss.
3. internal control formula dual free dimension spool rotary type four-way selector valve according to claim 1 and 2 is characterized in that: the described first valve pocket window, the second valve pocket window, the 3rd valve pocket window and the 4th valve pocket window are separately respectively along evenly distributing on the circumferencial direction of described valve pocket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320031299 CN203176031U (en) | 2013-01-22 | 2013-01-22 | Internal-control type valve core rotating type four-way reversing valve with two degrees of freedom |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320031299 CN203176031U (en) | 2013-01-22 | 2013-01-22 | Internal-control type valve core rotating type four-way reversing valve with two degrees of freedom |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203176031U true CN203176031U (en) | 2013-09-04 |
Family
ID=49072734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320031299 Expired - Lifetime CN203176031U (en) | 2013-01-22 | 2013-01-22 | Internal-control type valve core rotating type four-way reversing valve with two degrees of freedom |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203176031U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103104568A (en) * | 2013-01-22 | 2013-05-15 | 浙江大学 | Internally piloting type two-freedom-degree valve core rotation type four-way reversing valve |
-
2013
- 2013-01-22 CN CN 201320031299 patent/CN203176031U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103104568A (en) * | 2013-01-22 | 2013-05-15 | 浙江大学 | Internally piloting type two-freedom-degree valve core rotation type four-way reversing valve |
| CN103104568B (en) * | 2013-01-22 | 2015-05-20 | 浙江大学 | Internally piloting type two-freedom-degree valve core rotation type four-way reversing valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130904 Effective date of abandoning: 20150520 |
|
| RGAV | Abandon patent right to avoid regrant |