CN210738971U - Logic reversing valve group - Google Patents
Logic reversing valve group Download PDFInfo
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- CN210738971U CN210738971U CN201921328856.6U CN201921328856U CN210738971U CN 210738971 U CN210738971 U CN 210738971U CN 201921328856 U CN201921328856 U CN 201921328856U CN 210738971 U CN210738971 U CN 210738971U
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Abstract
The utility model relates to a logic switching-over valves, including the valves body, be equipped with hydraulic fluid port P, hydraulic fluid port A, hydraulic fluid port B, hydraulic fluid port T, liquid accuse switching-over valve, check valve 3, sequence valve and shuttle valve on the valves body, the check valve includes first check valve and second check valve, hydraulic fluid port P, hydraulic fluid port A and hydraulic fluid port B are connected with liquid accuse switching-over valve respectively, first check valve sets up between hydraulic fluid port A and liquid accuse switching-over valve, the second check valve sets up between hydraulic fluid port B and liquid accuse switching-over valve; the sequence valve is arranged between the oil port P and the oil port T; the lower end of the shuttle valve is connected with the sequence valve, and the other end of the shuttle valve is arranged between the first check valve and the oil port A. The utility model provides a can realize preferential action, and safe energy-conserving logic switching-over valves.
Description
Technical Field
The utility model relates to a logic switching-over valves.
Background
At present, the control of the main valve of the loader is an important component in a hydraulic system, the main valve is a control actuator, and to realize a series of actions, such as walking, bucket lifting, bucket descending, rock shoveling and the like, the prior action between the two main valves is realized, so that the combination of corresponding hydraulic elements is required to complete the control. There is a need for a valve assembly that can solve the problem of priority action between two main valves, and is safe, energy-saving and environment-friendly.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the defect that prior art exists, providing one kind and can realizing preferential action, and safe energy-conserving logic switching-over valves.
The utility model provides a technical scheme that its technical problem adopted is: a logic reversing valve group comprises a valve group body, wherein an oil port P, an oil port A, an oil port B, an oil port T, a hydraulic control reversing valve, a check valve 3, a sequence valve and a shuttle valve are arranged on the valve group body, the check valve comprises a first check valve and a second check valve, the oil port P, the oil port A and the oil port B are respectively connected with the hydraulic control reversing valve, the first check valve is arranged between the oil port A and the hydraulic control reversing valve, and the second check valve is arranged between the oil port B and the hydraulic control reversing valve; the sequence valve is arranged between the oil port P and the oil port T; the lower end of the shuttle valve is connected with the sequence valve, and the other end of the shuttle valve is arranged between the first check valve and the oil port A.
According to the utility model discloses a further embodiment, further include the valves body still is equipped with the damping hole, the damping hole communicates with liquid accuse switching-over valve, hydraulic fluid port B and shuttle valve respectively.
According to another embodiment of the present invention, it further comprises that the diameter of the orifice is 3.0 mm.
According to another embodiment of the present invention, it further comprises that the opening pressure of the pilot operated directional control valve is 10 Bar.
The utility model has the advantages that: the utility model provides a defect that exists among the background art, the utility model provides a set up the hydraulic control switching-over valve on the valve body, the check valve, the sequence valve, the logical switching-over valves of shuttle valve and damping hole, solve priority action between two main valves, when the main valve action of the priority action of needs, only need with the hydraulic control switching-over valve opening pressure reach 10Bar, system pressure will carry out the action of this main valve, when not needing priority main valve action, stop the low pressure and supply with, at this moment, system pressure oil switches to on another main valve, and join in marriage the off-load valve in this system, reach the off-load behind the certain pressure promptly, play safety, energy-conserving effect.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic front view of a preferred embodiment of the present invention;
fig. 2 is a schematic top view of a preferred embodiment of the present invention;
fig. 3 is a schematic control structure diagram of the preferred embodiment of the present invention.
Detailed Description
As shown in fig. 1-3: a logic reversing valve group comprises a valve group body 1, wherein an oil port P, an oil port A, an oil port B, an oil port T, a hydraulic control reversing valve 2, a check valve 3, a sequence valve 4 and a shuttle valve 5 are arranged on the valve group body 1, the check valve 3 comprises a first check valve 301 and a second check valve 302, the oil port P, the oil port A and the oil port B are respectively connected with the hydraulic control reversing valve 2, the first check valve 301 is arranged between the oil port A and the hydraulic control reversing valve 2, and the second check valve 302 is arranged between the oil port B and the hydraulic control reversing valve 2; the sequence valve 4 is arranged between the oil port P and the oil port T; the lower end of the shuttle valve 5 is connected with the sequence valve 4, and the other end is arranged between the first check valve 301 and the oil port A.
The valve group body 1 is further provided with a damping hole 6, and the damping hole 6 is respectively communicated with the hydraulic control reversing valve 2, the oil port B and the shuttle valve 5. The diameter of the damping hole 6 is 3.0 mm.
When pressure oil output by the pump enters from the port P and then reaches a main valve controlled by the port A, the pressure of the port P is unloaded when the pressure of the port P exceeds 170 Bar. When the main valve of the port P needs to work, the other path of hydraulic system can provide low-pressure oil for the port B to be 10Bar, at the moment, the hydraulic control reversing valve 2 is opened, then the pressure oil of the port P is switched to the port B, and when the pressure exceeds 170Bar pressure, the pressure of the port P is unloaded. When the main valve of the port B does not work, the supply of the low-pressure oil is stopped, and at this time, the pilot operated directional control valve 2 is closed, and the pressure oil of the port P is switched to the main valve of the port a to work.
It should be understood that the above description of the specific embodiments is only for the purpose of explanation and not for the purpose of limitation. Obvious changes or variations caused by the spirit of the present invention are within the scope of the present invention.
Claims (4)
1. A logic switching valve group is characterized in that: the hydraulic reversing valve comprises a valve group body, wherein an oil port P, an oil port A, an oil port B, an oil port T, a hydraulic control reversing valve, a one-way valve, a sequence valve and a shuttle valve are arranged on the valve group body, the one-way valve comprises a first one-way valve and a second one-way valve, the oil port P, the oil port A and the oil port B are respectively connected with the hydraulic control reversing valve, the first one-way valve is arranged between the oil port A and the hydraulic control reversing valve, and the second one-way valve is arranged between the oil port B and the hydraulic control reversing valve; the sequence valve is arranged between the oil port P and the oil port T; the lower end of the shuttle valve is connected with the sequence valve, and the other end of the shuttle valve is arranged between the first check valve and the oil port A.
2. The set of logical directional valves of claim 1, wherein: the valve group body is also provided with a damping hole which is respectively communicated with the hydraulic control reversing valve, the oil port B and the shuttle valve.
3. The set of logical directional valves of claim 2, wherein: the diameter of the damping hole is 3.0 mm.
4. The set of logical directional valves of claim 1, wherein: the opening pressure of the hydraulic control reversing valve is 10 Bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921328856.6U CN210738971U (en) | 2019-08-16 | 2019-08-16 | Logic reversing valve group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921328856.6U CN210738971U (en) | 2019-08-16 | 2019-08-16 | Logic reversing valve group |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210738971U true CN210738971U (en) | 2020-06-12 |
Family
ID=70983280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921328856.6U Active CN210738971U (en) | 2019-08-16 | 2019-08-16 | Logic reversing valve group |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210738971U (en) |
-
2019
- 2019-08-16 CN CN201921328856.6U patent/CN210738971U/en active Active
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