CN203051283U - Introcontrol type four-way reversing valve - Google Patents
Introcontrol type four-way reversing valve Download PDFInfo
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- CN203051283U CN203051283U CN 201320031049 CN201320031049U CN203051283U CN 203051283 U CN203051283 U CN 203051283U CN 201320031049 CN201320031049 CN 201320031049 CN 201320031049 U CN201320031049 U CN 201320031049U CN 203051283 U CN203051283 U CN 203051283U
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- boss
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- valve pocket
- spool
- chamber
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Abstract
The utility model discloses an introcontrol type four-way reversing valve, wherein a valve element is composed of a first valve element and a second valve element, a first boss and a second boss are arranged on the first valve element, and a third boss, a fourth boss and a fifth boss are arranged on the second valve element. The first boss, the second boss, the third boss, the fourth boss and the fifth boss are arranged in sequence along the direction of a first end cover to a second end cover, a cavity is formed between every two adjacent bosses, a spring is arranged inside the cavity between the second boss and the third boss, an axial through hole is formed in the fifth boss, the outer end face of the fifth boss tightly contacts the second end cover, and corresponding grooves are formed in the end face of the first boss, the end face of the second boss, the end face of the third boss and the end face of the fourth boss along the peripheral direction at intervals. The introcontrol type four-way reversing valve can complement leakage and machining error of a four-way reversing valve and eliminate polarization of an execution hydraulic cylinder.
Description
Technical field
The utility model relates to a kind of hydraulicdirectional control valve, particularly a kind of four-way change-over valve for the control oil hydraulic cylinder.
Background technique
In existing engineering, the time regular meeting run into the displacement of carrying out oil hydraulic cylinder the situation of biasing take place, even can hit cylinder, this greatly reduces the service behaviour of carrying out oil hydraulic cylinder.Make and carry out the oil hydraulic cylinder displacement that the reason of biasing takes place is a lot, wherein most important reason is because leakage and the machining error of control valve, makes to carry out the A hydraulic fluid port of oil hydraulic cylinder and the hydraulic fluid flow rate of B hydraulic fluid port does not wait by system.
The model utility content
The purpose of this utility model is the defective of setovering at the oil hydraulic cylinder that prior art exists, and a kind of new internal control formula four-way change-over valve is provided.
For achieving the above object, the technological scheme that the utility model is taked is: the utility model internal control formula four-way change-over 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 and second boss at first spool, be provided with the 3rd boss, the 4th boss and the 5th boss at second spool; First boss, second boss, the 3rd boss, the 4th boss, the 5th boss are arranged to the direction of second end cap successively along first end cap;
Form first chamber between first boss and second boss, have the A hydraulic fluid port of carrying out oil hydraulic cylinder for control on the valve body wall at place, first chamber, the valve body wall at the first boss place has first return opening that first chamber is communicated with fuel tank;
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, 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 second chamber between second boss and the 3rd boss, has the filler opening that second chamber is communicated with oil supply system on the valve body wall at place, second chamber; Be provided with a spring in second 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;
Form the 3rd chamber between the 3rd boss and the 4th boss, have the B hydraulic fluid port of carrying out oil hydraulic cylinder for control on the valve body wall at place, the 3rd chamber, the valve body wall at the 4th boss place has second return opening that the 3rd chamber is communicated with fuel tank;
Between the 4th boss and the 5th boss, form the 4th chamber, have the control hydraulic fluid port that the 4th chamber is communicated with oil supply system on the valve body wall at place, the 4th chamber; The exterior edge face of the 5th boss closely contacts with second end cap, and described the 5th boss is provided with axial hole, and second spool is provided with in the position at place, the 4th chamber and controls the radial direction through hole that hydraulic fluid port is communicated with, and described radial direction through hole is communicated with axial hole;
First boss on a side end face of second boss along the circumferential direction the compartment of terrain have first groove that first return opening is communicated with the A hydraulic fluid port; Second boss on a side end face of first boss along the circumferential direction the compartment of terrain have second groove, second boss on a side end face of the 3rd boss along the circumferential direction the compartment of terrain have the 3rd groove, filler opening can successively pass through the 3rd groove, second groove is communicated with the A hydraulic fluid port; The 3rd boss on a side end face of second boss along the circumferential direction the compartment of terrain have the 4th groove, the 3rd boss on a side end face of the 4th boss along the circumferential direction the compartment of terrain have the 5th groove, filler opening can successively pass through the 4th groove, the 5th groove is communicated with the B hydraulic fluid port; The 4th boss on a side end face of the 3rd boss along the circumferential direction the compartment of terrain have the 6th groove that second return opening is communicated with the B hydraulic fluid port; Corresponding mutually first groove, the 4th groove and the 5th groove projection on the projection plane vertical with the medial axis of valve pocket is overlapped, corresponding mutually second groove, the 3rd groove and the 6th groove projection on the projection plane vertical with the medial axis of valve pocket is overlapped, and the projection on the projection plane vertical with the medial axis of valve pocket along the circumferential direction alternately is staggeredly arranged first groove with second groove;
Described valve pocket has the first valve pocket window, the second valve pocket window, the 3rd valve pocket window, the 4th valve pocket window, the 5th valve pocket window and the 6th valve pocket window respectively accordingly in the position at first groove, second groove, the 3rd groove, the 4th groove, the 5th groove and the 6th groove place, and the corresponding mutually first valve pocket window, the second valve pocket window, the 3rd valve pocket window, the 4th valve pocket window, the 5th valve pocket window are overlapped with the projection of the 6th valve pocket window on the projection plane vertical with the medial axis of valve pocket.
Further, first groove described in the utility model is along evenly distributing on the circumferencial direction of the end face of described first boss, described second groove and the 3rd groove are along evenly distributing on the circumferencial direction of the end face of described second boss, described the 4th groove and the 5th groove are along evenly distributing on the circumferencial direction of the end face of described the 3rd boss, and described the 6th groove is 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, the 4th valve pocket window, the 5th valve pocket window and the 6th 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: can compensate leakage and the machining error of four-way change-over valve, eliminate the biasing of carrying out oil hydraulic cylinder.
Description of drawings
Fig. 1 is the internal structure schematic representation of the utility model internal control formula four-way change-over valve when being in P → B working state (i.e. first working state), and wherein valve body, valve pocket and end cap partly are longitudinal section, center sectional views;
Fig. 2 is the internal structure schematic representation of the utility model internal control formula four-way change-over valve when being in P → A working state (i.e. second working state);
Fig. 3 is the three-dimensional structure schematic representation that valve body is cut open along its longitudinal section, center;
Fig. 4 is the three-dimensional structure schematic representation of valve pocket;
Fig. 5 is the three-dimensional structure schematic representation of first spool;
Fig. 6 is the three-dimensional structure schematic representation of second spool;
Fig. 7 is first groove and the projection position distribution relation schematic representation of second groove on the projection plane vertical with the medial axis of valve pocket;
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; First end of 12-the first spool; Second end of 13-the first spool; First end of 14-the second spool; 15-spring; One end of 16-spring; The other end of 17-spring; 18-the first chamber; 19-the second chamber; 20-the three chamber; 21-the four chamber; 22-radial direction through hole; 23-axial hole; 24-control hydraulic fluid port; 25-the first return opening; 26-filler opening; 27-the second return opening; 28-A hydraulic fluid port; 29-B hydraulic fluid port; 30-the first groove; 31-the second groove; 32-the three groove; 33-the four groove; 34-the five groove; 35-the six 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-the five valve pocket window; 41-the six valve pocket window.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
As depicted in figs. 1 and 2, the utility model internal control formula four-way change-over valve mainly comprises valve body 1, valve pocket 2, first spool 3, second spool 4, first end cap 5 and second end cap 6.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. 2, Fig. 5 and shown in Figure 6, be provided with first boss 7 and second boss 8 at first spool 3, be provided with the 3rd boss 9, the 4th boss 10 and the 5th boss 11 at second spool 4, and first boss 7, second boss 8, the 3rd boss 9, the 4th boss 10 and the 5th boss 11 are arranged successively on from first end cap 5 to the direction of second end cap 6.First end 12 of first spool runs through and stretches out first end cap 5, first end 12 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, antifouling property is good.As another kind of mode of execution of the present utility model, first end 12 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.
As Fig. 1 and shown in Figure 2, first chamber 18 is the cavity that forms between first boss 7 and second boss 8, have the A hydraulic fluid port 28 of carrying out oil hydraulic cylinder for control on the wall of the valve body 1 at 18 places, first chamber, have first return opening 25 that first chamber 18 is communicated with fuel tank at the wall of the valve body 1 at first boss, 7 places.Second chamber 19 is the cavity that forms between second boss 8 and the 3rd boss 9, has the filler opening 26 that second chamber 19 is communicated with oil supply system on the wall of the valve body 1 at 19 places, second chamber; Spring 15 is positioned at second chamber 19, second end 13 of first spool and first end 14 of second spool stretch in the spring 15, and second end 13 of first spool is relative with first end 14 of second spool, one end 16 of spring is fixedlyed connected with second spool 4, and the other end 17 of spring is fixedlyed connected with first spool 3.The 3rd chamber 20 is the cavity that forms between the 3rd boss 9 and the 4th boss 10, have the B hydraulic fluid port 29 of carrying out oil hydraulic cylinder for control on the wall of the valve body 1 at 20 places, the 3rd chamber, have second return opening 27 that the 3rd chamber 20 is communicated with fuel tank at the wall of the valve body 1 at the 4th boss 10 places.The 4th chamber 21 is the cavity that forms between the 4th boss 10 and the 5th boss 11, has the control hydraulic fluid port 24 that the 4th chamber 21 is communicated with oil supply system on the wall of the valve body 1 at 21 places, the 4th chamber.Compare with other boss, the 5th boss 11 the most close second end cap, 6, the five boss 11 are provided with axial hole 23.Second spool 4 is provided with in the position at 21 places, the 4th chamber and controls the radial direction through hole 22 that hydraulic fluid port 24 is communicated with, and radial direction through hole 22 is communicated with axial hole 23.
As Fig. 1, Fig. 2, Fig. 5 and shown in Figure 6, first boss 7 on a side end face of second boss 8 along the circumferential direction the compartment of terrain have and can make first return opening 25 be communicated with 28 first groove 30 with the A hydraulic fluid port.Second boss 8 on a side end face of first boss 7 along the circumferential direction the compartment of terrain have second groove 31, second boss 8 on a side end face of the 3rd boss 9 along the circumferential direction the compartment of terrain have the 3rd groove 32, filler opening 26 can be communicated with A hydraulic fluid port 28 by the 3rd groove 32, second groove 31 successively according to sequencing.The 3rd boss 9 on a side end face of second boss 8 along the circumferential direction the compartment of terrain have the 4th groove 33, the 3rd boss 9 on a side end face of the 4th boss 10 along the circumferential direction the compartment of terrain have the 5th groove 34, the filler openings 26 and can be communicated with B hydraulic fluid port 29 by the 4th groove 33, the 5th groove 34 successively according to sequencing.The 4th boss 10 on a side end face of the 3rd boss 9 along the circumferential direction the compartment of terrain have the 6th groove 35 that second return opening 27 is communicated with B hydraulic fluid port 29.
As shown in Figure 7, first groove 30 along the circumferential direction alternately is staggeredly arranged with the projection of second groove 31 on the projection plane vertical with the medial axis of valve pocket 2.First groove 30, the 4th groove 33 and the 5th groove 34 corresponding one by one, and corresponding first groove 30, the 4th groove 33 is overlapped with the projection of the 5th groove 34 on the projection plane vertical with the medial axis of valve pocket 2 mutually; Second groove 31, the 3rd groove 32 and the 6th groove 35 are corresponding one by one, and corresponding mutually second groove 31, the 3rd groove 32 are overlapped with the projection of the 6th groove 35 on the projection plane vertical with the medial axis of valve pocket 2.
As preferred version of the present utility model, first groove 30 on first boss 7 is along evenly distributing on the circumferencial direction of the end face of first boss 7; Second groove 31 on second boss 8 is along evenly distributing on the circumferencial direction of the end face of second boss 8, and the 3rd groove 32 on second boss 8 is along evenly distributing on the circumferencial direction of the end face of second boss 8; The 4th groove 33 on the 3rd boss 9 is along evenly distributing on the circumferencial direction of the end face of the 3rd boss 9, and the 5th groove 34 on the 3rd boss 9 is along evenly distributing on the circumferencial direction of the end face of the 3rd boss 9; The 6th 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 Fig. 1, Fig. 2 and shown in Figure 4, valve pocket 2 has the corresponding first valve pocket window 36 in the position at first groove, 30 places, valve pocket 2 has the corresponding second valve pocket window 37 in the position at second groove, 31 places, valve pocket 2 has corresponding the 3rd valve pocket window 38 in the position at the 3rd groove 32 places, valve pocket 2 has corresponding the 4th valve pocket window 39 in the position at the 4th groove 33 places, valve pocket 2 has corresponding the 5th valve pocket window 40 in the position at the 5th groove 34 places, and valve pocket 2 has corresponding the 6th valve pocket window 41 in the position at the 6th groove 35 places.The first valve pocket window 36, the second valve pocket window 37, the 3rd valve pocket window 38, the 4th valve pocket window 39, the 5th valve pocket window 40 and the 6th valve pocket window 41 are corresponding one by one, and the corresponding mutually first valve pocket window 36, the second valve pocket window 37, the 3rd valve pocket window 38, the 4th valve pocket window 39, the 5th valve pocket window 40 are overlapped with the projection of the 6th valve pocket window 41 on the projection plane vertical with the medial axis of valve pocket 2.
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, the 4th valve pocket window 39 on the valve pocket 2 is along evenly distributing on the circumferencial direction of valve pocket 2, the 5th valve pocket window 40 on the valve pocket 2 is along evenly distributing on the circumferencial direction of valve pocket 2, and the 6th valve pocket window 41 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 four-way change-over valve is: 3 rotations of first spool, drive 4 rotations of second spool by spring 15, when second spool 4 rotated to as shown in Figure 1 position, the utility model selector valve was in P → B working state (i.e. first working state).At this moment, first groove 30 is communicated with the first valve pocket window 36, and the 4th groove 33 is communicated with the 4th valve pocket window 39 simultaneously, and the 5th groove 34 is communicated with the 5th valve pocket window 40 simultaneously.The hydraulic oil that flows to second chamber 19 by filler opening 26 is the 4th groove 33 and the 4th valve pocket window 39 by being on state at first successively, then enter the 3rd chamber 20 behind the 5th valve pocket window 40 by being on state, the 5th groove 34 successively, enter the execution oil hydraulic cylinder through B hydraulic fluid port 29 then; Enter first chamber 18 from carrying out hydraulic oil that oil hydraulic cylinder the flows out A hydraulic fluid port 28 of flowing through simultaneously, then first groove 30 and the first valve pocket window 36 by being on state flows back to fuel tank through first return opening 25 then.When second spool 4 rotated to as shown in Figure 2 position, the utility model selector valve was in P → A working state (i.e. second working state).At this moment, second groove 31 is communicated with the second valve pocket window 37, and the 3rd groove 32 is communicated with the 3rd valve pocket window 38 simultaneously, and the 6th groove 35 is communicated with the 6th valve pocket window 41 simultaneously.The hydraulic oil that flows to second chamber 19 by filler opening 26 is the 3rd groove 32 and the 3rd valve pocket window 38 by being on state at first successively, then enter first chamber 18 behind the second valve pocket window 37 by being on state, second groove 31 successively, enter the execution oil hydraulic cylinder through A hydraulic fluid port 28 then; Enter the 3rd chamber 20 from carrying out hydraulic oil that oil hydraulic cylinder the flows out B hydraulic fluid port 29 of flowing through simultaneously, then the 6th groove 35 and the 6th valve pocket window 41 by being on state flows back to fuel tank through second return opening 27 then.The rotation of first spool 3 and second spool 4, the utility model selector valve periodically alternately is in first working state and second working state.
In the prior art, because leakage and the machining error of control valve, make that area of passage and corresponding area of passage when being in P → B working state when selector valve is in P → A working state are unequal, it is unequal to enter the flow that enters the B hydraulic fluid port when flow of A hydraulic fluid port and selector valve are in P → B working state when causing selector valve to be in P → A working state like this, the result makes the displacement of carrying out oil hydraulic cylinder that the situation of biasing take place, even can hit cylinder, this reduces the service behaviour of carrying out oil hydraulic cylinder greatly.And the utility model selector valve is in first spool 3 and 4 rotations of second spool, the hydraulic oil that oil supply system provides enters the 4th chamber 21 by control hydraulic fluid port 24, through behind radial direction through hole 22 and the axial hole 23, hydraulic oil acts on and produces the power of surging and reaction on second end cap 6 on the 5th boss 11.At this moment, if make the power of surging that acts on the 5th boss 11 making a concerted effort greater than the power of surging of hydraulic oil in the preset power of spring 15 and second chamber 19, axial displacement is taking place by second spool 4 to the direction of first spool 3 in the beginning of second spool 4 so, and then the utility model selector valve area of passage of being in P → A working state changes.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 pass through the size of the axial displacement of control second spool 4, namely control the size that the utility model selector valve is in the area of passage of P → A working state, the flow that makes the utility model selector valve enter the flow of A hydraulic fluid port when being in P → A working state and enter the B hydraulic fluid port when being in P → B working state equates, thereby eliminate the biasing problem of carrying out oil hydraulic cylinder, promote the service behaviour of carrying out oil hydraulic cylinder greatly.
The content of this specification statement 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 four-way change-over 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 and second boss at first spool, be provided with the 3rd boss, the 4th boss and the 5th boss at second spool; First boss, second boss, the 3rd boss, the 4th boss, the 5th boss are arranged to the direction of second end cap successively along first end cap;
Form first chamber between first boss and second boss, have the A hydraulic fluid port of carrying out oil hydraulic cylinder for control on the valve body wall at place, first chamber, the valve body wall at the first boss place has first return opening that first chamber is communicated with fuel tank;
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, 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 second chamber between second boss and the 3rd boss, has the filler opening that second chamber is communicated with oil supply system on the valve body wall at place, second chamber; Be provided with a spring in second 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;
Form the 3rd chamber between the 3rd boss and the 4th boss, have the B hydraulic fluid port of carrying out oil hydraulic cylinder for control on the valve body wall at place, the 3rd chamber, the valve body wall at the 4th boss place has second return opening that the 3rd chamber is communicated with fuel tank;
Between the 4th boss and the 5th boss, form the 4th chamber, have the control hydraulic fluid port that the 4th chamber is communicated with oil supply system on the valve body wall at place, the 4th chamber; The exterior edge face of the 5th boss closely contacts with second end cap, and described the 5th boss is provided with axial hole, and second spool is provided with in the position at place, the 4th chamber and controls the radial direction through hole that hydraulic fluid port is communicated with, and described radial direction through hole is communicated with axial hole;
First boss on a side end face of second boss along the circumferential direction the compartment of terrain have first groove that first return opening is communicated with the A hydraulic fluid port; Second boss on a side end face of first boss along the circumferential direction the compartment of terrain have second groove, second boss on a side end face of the 3rd boss along the circumferential direction the compartment of terrain have the 3rd groove, filler opening can successively pass through the 3rd groove, second groove is communicated with the A hydraulic fluid port; The 3rd boss on a side end face of second boss along the circumferential direction the compartment of terrain have the 4th groove, the 3rd boss on a side end face of the 4th boss along the circumferential direction the compartment of terrain have the 5th groove, filler opening can successively pass through the 4th groove, the 5th groove is communicated with the B hydraulic fluid port; The 4th boss on a side end face of the 3rd boss along the circumferential direction the compartment of terrain have the 6th groove that second return opening is communicated with the B hydraulic fluid port; Corresponding mutually first groove, the 4th groove and the 5th groove projection on the projection plane vertical with the medial axis of valve pocket is overlapped, corresponding mutually second groove, the 3rd groove and the 6th groove projection on the projection plane vertical with the medial axis of valve pocket is overlapped, and the projection on the projection plane vertical with the medial axis of valve pocket along the circumferential direction alternately is staggeredly arranged first groove with second groove;
Described valve pocket has the first valve pocket window, the second valve pocket window, the 3rd valve pocket window, the 4th valve pocket window, the 5th valve pocket window and the 6th valve pocket window respectively accordingly in the position at first groove, second groove, the 3rd groove, the 4th groove, the 5th groove and the 6th groove place, and the corresponding mutually first valve pocket window, the second valve pocket window, the 3rd valve pocket window, the 4th valve pocket window, the 5th valve pocket window are overlapped with the projection of the 6th valve pocket window on the projection plane vertical with the medial axis of valve pocket.
2. internal control formula four-way change-over valve according to claim 1, it is characterized in that: described first groove is along evenly distributing on the circumferencial direction of the end face of described first boss, described second groove and the 3rd groove are along evenly distributing on the circumferencial direction of the end face of described second boss, described the 4th groove and the 5th groove are along evenly distributing on the circumferencial direction of the end face of described the 3rd boss, and described the 6th groove is along evenly distributing on the circumferencial direction of the end face of described the 4th boss.
3. internal control formula four-way change-over 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, the 4th valve pocket window, the 5th valve pocket window and the 6th 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 201320031049 CN203051283U (en) | 2013-01-22 | 2013-01-22 | Introcontrol type four-way reversing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320031049 CN203051283U (en) | 2013-01-22 | 2013-01-22 | Introcontrol type four-way reversing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203051283U true CN203051283U (en) | 2013-07-10 |
Family
ID=48734241
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320031049 Withdrawn - After Issue CN203051283U (en) | 2013-01-22 | 2013-01-22 | Introcontrol type four-way reversing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203051283U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103089731A (en) * | 2013-01-22 | 2013-05-08 | 浙江大学 | Internal control type four-way reversing valve |
-
2013
- 2013-01-22 CN CN 201320031049 patent/CN203051283U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103089731A (en) * | 2013-01-22 | 2013-05-08 | 浙江大学 | Internal control type four-way reversing valve |
| CN103089731B (en) * | 2013-01-22 | 2015-09-09 | 浙江大学 | A kind of internal control type four-way change-over 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: 20130710 Effective date of abandoning: 20150909 |
|
| RGAV | Abandon patent right to avoid regrant |