CN219176676U - Control valve group, hydraulic system and operation machine - Google Patents
Control valve group, hydraulic system and operation machine Download PDFInfo
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- CN219176676U CN219176676U CN202320248209.4U CN202320248209U CN219176676U CN 219176676 U CN219176676 U CN 219176676U CN 202320248209 U CN202320248209 U CN 202320248209U CN 219176676 U CN219176676 U CN 219176676U
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Abstract
The utility model relates to the field of hydraulic control, and provides a control valve group, a hydraulic system and an operation machine, wherein the control valve group comprises: the main valve comprises a first oil port and an oil return port, and the first oil port is communicated with the oil return port; the first check valve group is connected at a first oil port and comprises a first check valve and a second check valve, the first check valve is connected with the second check valve in parallel, and the conduction directions of the first check valve and the second check valve are opposite. The control valve group provided by the utility model is used for solving the defects of slow action response and delayed action in the prior art, and the first one-way valve group is arranged at the first oil port of the main valve, and the first one-way valve and the second one-way valve which are connected in parallel and have opposite conduction directions of the first one-way valve group enable an oil return pipeline of an executing mechanism to be filled with oil, so that the quick establishment of pressure during the action of the executing mechanism is facilitated, and the response time of the executing action is reduced.
Description
Technical Field
The utility model relates to the technical field of hydraulic control, in particular to a control valve group, a hydraulic system and a working machine.
Background
In a work machine, there is a phenomenon that an operation response is slow and an operation is delayed when an operation platform is operated due to a long hydraulic line. For example, the platform of the aerial working platform swings, the fly arm oil cylinder and the like act, the hydraulic system needs a longer establishing process from zero to working pressure when working, and meanwhile, the response speed of the hydraulic system is slower due to the longer pipeline of the aerial working platform.
Disclosure of Invention
The utility model provides a control valve group, a hydraulic system and an operation machine, which are used for solving the defects of slow action response and action delay in the prior art, and realizing that a first one-way valve group with opposite conduction directions is arranged in parallel at an oil outlet of a main valve, so that oil is still fully stored in an oil return pipeline of an executing mechanism, the quick establishment of pressure is facilitated, and the response time is reduced.
The utility model provides a control valve group, comprising:
the main valve comprises a first oil port and an oil return port, wherein the first oil port is used for being connected with one oil port of the actuating mechanism, and in a state of one working position of the main valve, the first oil port is communicated with the oil return port which is used for being connected with an oil tank;
the first check valve group is connected to the first oil port, the first check valve group comprises a first check valve and a second check valve, the first check valve is connected with the second check valve in parallel, and the conduction direction of the first check valve is opposite to that of the second check valve.
According to the control valve group provided by the utility model, the oil inlet of the first one-way valve is connected with the first oil port, and the oil outlet of the first one-way valve is used for being connected with one oil port of the actuating mechanism;
wherein the opening pressure of the second one-way valve is greater than the opening pressure of the first one-way valve.
According to the control valve group provided by the utility model, the oil inlet of the first one-way valve is connected with the first oil port, and the oil outlet of the first one-way valve is used for being connected with one oil port of the actuating mechanism;
the opening pressure of the second one-way valve is smaller than the working pressure of the executing mechanism.
According to the control valve group provided by the utility model, the main valve further comprises a second oil port, wherein the second oil port is used for being connected with the other oil port of the actuating mechanism, and the second oil port is communicated with the oil return port in a state of one working position of the main valve;
the second check valve group is connected to the second oil port, the second check valve group comprises a third check valve and a fourth check valve, the third check valve is connected with the fourth check valve in parallel, and the conduction directions of the third check valve and the fourth check valve are opposite.
According to the control valve group provided by the utility model, the oil inlet of the third one-way valve is connected with the second oil port, and the oil outlet of the third one-way valve is used for being connected with the other oil port of the actuating mechanism;
wherein the opening pressure of the fourth one-way valve is greater than the opening pressure of the third one-way valve.
According to the control valve group provided by the utility model, the oil inlet of the third one-way valve is connected with the second oil port, and the oil outlet of the third one-way valve is used for being connected with the other oil port of the actuating mechanism;
the opening pressure of the fourth one-way valve is smaller than the working pressure of the executing mechanism.
The utility model also provides a hydraulic system which comprises an oil source, an oil tank, an actuating mechanism and the control valve group;
the oil source is connected with the main valve, the oil tank is connected with the oil return port, and one oil port of the actuating mechanism is connected with the first one-way valve group.
The hydraulic system provided by the utility model further comprises a balance valve group, wherein the balance valve group is arranged at an oil port of the actuating mechanism.
The hydraulic system provided by the utility model further comprises a compensation valve, wherein the compensation valve is connected between the oil source and the main valve.
The utility model also provides a working machine, which comprises the control valve group;
alternatively, the work machine includes the hydraulic system described above.
According to the control valve group provided by the utility model, the first one-way valve group is arranged at the first oil port of the main valve, and the first one-way valve and the second one-way valve which are connected in parallel and have opposite conducting directions of the first one-way valve group are used for filling oil in the oil return pipeline of the executing mechanism in a state that the first oil port is communicated with the oil return port, so that the pressure of the executing mechanism can be quickly built when the executing mechanism acts, and the response time of executing the action is reduced.
Further, the hydraulic system and the working machine according to the present utility model have the control valve group as described above, and thus also have various advantages as described above.
Drawings
In order to more clearly illustrate the utility model or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a hydraulic system provided by the present utility model.
Reference numerals:
100: a control valve group; 101: a main valve; 102: a first one-way valve group; 103: a second one-way valve group; 104: a compensation valve; 110: a fifth check valve; 111: a first one-way valve; 112: a second one-way valve; 113: a third one-way valve; 114: a fourth one-way valve; 121: a first oil port; 122: a second oil port; 123: an oil return port; 124: a first oil inlet; 200: an actuator; 201: a first working oil port; 202: a second working oil port; 210: balance valve group.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the embodiments of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., are based on directions or positional relationships shown in the drawings, are merely for convenience of describing the embodiments of the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the embodiments of the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In describing embodiments of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "coupled," "coupled," and "connected" should be construed broadly, and may be either a fixed connection, a removable connection, or an integral connection, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in embodiments of the present utility model will be understood in detail by those of ordinary skill in the art.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
An embodiment of the present utility model is described below with reference to fig. 1. It is to be understood that the following are only illustrative embodiments of the present utility model and are not to be construed as limiting the utility model.
As shown in fig. 1, the present utility model provides a control valve assembly 100 including: the main valve 101 and the first one-way valve group 102, the main valve 101 comprises a first oil port 121 and an oil return port 123, the first oil port 121 is used for being connected with one oil port of the actuating mechanism 200, the first oil port 121 is communicated with the oil return port 123 in a state of one working position of the main valve 101, and the oil return port 123 is used for being connected with an oil tank; the first check valve set 102 is connected at the first oil port 121, the first check valve set 102 comprises a first check valve 111 and a second check valve 112, the first check valve 111 is connected in parallel with the second check valve 112, and the conduction directions of the first check valve 111 and the second check valve 112 are opposite. For example, when the first oil port 121 is filled with oil, the first check valve 111 passes through, and the second check valve 112 is not conducted; the first oil port 121 passes through the second check valve 112 when returning oil, and the first check valve 111 is not conductive. Of course, the reverse arrangement is also possible. The main valve 101 is a unitary multi-way valve.
The main valve 101 is used to control the operation state of the actuator 200, for example, the operation position of the main valve 101 is switched, and the actuator 200 is switched to a telescopic state. The first oil port 121 of the main valve 101 is connected with one oil port of the actuator 200 through the first check valve group 102, after the pressure oil is introduced into the main valve 101, the pressure oil flows out through the first oil port 121, flows to the actuator 200 through the first check valve 111 of the first check valve group 102, and the actuator 200 acts, for example, extends out; the other oil port of the actuator 200 returns oil, and when the main valve 101 is switched to another working position in a reversing manner, the pressure oil introduced from the main valve 101 enters the other oil port of the actuator 200, and the actuator 200 performs an action, such as retraction.
The oil in one oil port of the actuator 200 flows back to the oil tank from the second check valve 112 of the first check valve set 102 through the oil return port 123, at this time, the second check valve 112 has a certain opening pressure, the oil pipe between one oil port of the actuator 200 and the second check valve 112 is filled with the oil, and the reserved pressure in one oil port of the actuator 200 is determined by the opening pressure of the second check valve 112. Since one oil port of the actuator 200 has a reserved pressure, when the main valve 101 is switched back to the oil port to perform the operation, the pressure is quickly established, and the operation response time is shortened.
For example, the main valve 101 includes three working positions, and in a state where the main valve 101 is in the neutral position, the actuator 200 is in a stopped state, and both ports of the actuator 200 are connected to the oil return port 123 of the main valve 101. Because the first one-way valve group 102 is arranged between the first oil port 121 and the actuating mechanism 200, the first oil port 121 is used for controlling the actuating mechanism 200 to extend, when the main valve 101 is switched from the middle position to the first working position, the first oil port 121 is used for oil feeding, and under the reserved pressure of one oil port of the actuating mechanism 200 formed by the second one-way valve 112, the actuating mechanism 200 can quickly establish pressure, the extending action can be quickly completed, and the response time is obviously shortened. For example, the main valve 101 may be a three-position five-way directional valve or a two-position five-way directional valve, the main valve 101 may be a solenoid valve, a pilot operated valve or a manual valve, and the main valve 101 may be a proportional valve.
Compared with the damping arranged at the oil port of the actuating mechanism, the first check valve set 102 has the advantages of small flow, low pressure and low loss when the actuating mechanism acts. The adoption of the first check valve set 102 has wider applicability than the addition of a check valve in the return line of a chip-type multi-way valve.
Specifically, in one embodiment of the present utility model, the oil inlet of the first check valve 111 is connected to the first oil port 121, and the oil outlet of the first check valve 111 is used to connect to one oil port of the actuator 200; that is, the first check valve 111 is turned on when the first oil port 121 is filled with oil, and pressure oil is communicated to the first working oil port 201 of the actuator 200.
The opening pressure of the second check valve 112 is greater than the opening pressure of the first check valve 111, when the first oil port 121 is communicated with the oil return port 123 for oil return, the oil flowing out of the first working oil port 201 of the actuator 200 flows back to the oil tank through the second check valve 112, wherein the opening pressure of the second check valve 112 controls the reserved pressure of the first working oil port 201 of the actuator 200, so as to reduce the flow loss during the actuation of the actuator 200 and realize quick re-actuation, the opening pressure of the first check valve 111 is as small as possible, and the opening pressure of the second check valve 112 is obviously greater than the opening pressure of the first check valve 111, thereby realizing quick establishment of pressure.
Furthermore, in another embodiment of the present utility model, the oil inlet of the first check valve 111 is connected to the first oil port 121, and the oil outlet of the first check valve 111 is used to connect to one oil port of the actuator 200; wherein the opening pressure of the second check valve 112 is less than the operating pressure of the actuator 200. That is, the opening pressure of the second check valve 112 may be greater than the opening pressure of the first check valve 111, while being less than the operating pressure of the actuator 200.
Of course, the opening pressure of the second check valve 112 may be only smaller than the operating pressure of the actuator 200, and may be equal to the opening pressure of the first check valve 111, or even smaller than the opening pressure of the first check valve 111.
With continued reference to fig. 1, in some embodiments of the present utility model, a set of second check valve sets 103 having the same structure as the first check valve set 102 is similarly disposed between the second port 122 of the main valve 101 and the second working port 202 of the actuator 200.
Specifically, the main valve 101 further includes a second oil port 122, where the second oil port 122 is used to connect with another oil port of the actuator 200, and in a state of one working position of the main valve 101, the second oil port 122 is communicated with the oil return port 123; the control valve group 100 further comprises a second check valve group 103, the second check valve group 103 is connected at the second oil port 122, the second check valve group 103 comprises a third check valve 113 and a fourth check valve 114, the third check valve 113 is connected with the fourth check valve 114 in parallel, and the conduction directions of the third check valve 113 and the fourth check valve 114 are opposite.
For example, when the main valve 101 is in the first working position, the first oil port 121 is filled with oil, and the oil enters the first working oil port 201 of the actuator 200 through the first check valve 111, and the actuator 200 performs the extending operation; the oil flowing out of the second working oil port 202 of the actuating mechanism 200 flows back to the oil tank through the fourth one-way valve 114, the second oil port 122 and the oil return port 123; the opening pressure of the fourth check valve 114 controls the reserve pressure of the second hydraulic port 202.
When the main valve 101 is switched to the second working position, the second inlet is filled with oil and enters the second working oil port 202 of the actuator 200 through the third one-way valve 113, and the second working oil port 202 establishes the reserved pressure through the fourth one-way valve 114, so that the second working oil port 202 can rapidly establish the working pressure and rapidly respond to the retraction motion. The oil in the first working oil port 201 of the actuator 200 flows back to the oil tank through the second one-way valve 112, the first oil port 121 and the oil return port 123, and similarly, the first working oil port 201 establishes a reserved pressure through the second one-way valve 112, where the reserved pressure of the first working oil port 201 may be equal to or different from the reserved pressure of the second working oil port 202.
In addition, when the main valve 101 is shifted to the neutral position, the first port 121 and the second port 122 may be simultaneously connected to the oil return port 123 for unloading. At this time, the actuator 200 is in a stop working state, the oil in the first working oil port 201 flows back to the oil tank through the second check valve 112, the oil in the second working oil port 202 flows back to the oil tank through the fourth check valve 114, and the second check valve 112 and the fourth check valve 114 establish a reserved pressure for the first working oil port 201 and the second working oil port 202. When the main valve 101 is again actuated to switch, pressure builds quickly and responds quickly whether the actuator 200 is extended or retracted. The actuator 200 may be an oil cylinder, a rotary motor, or the like.
Wherein, in an alternative embodiment of the present utility model, the oil inlet of the third check valve 113 is connected to the second oil port 122, and the oil outlet of the third check valve 113 is used to connect to the other oil port of the actuator 200; wherein the opening pressure of the fourth check valve 114 is greater than the opening pressure of the third check valve 113. In order to reduce the flow loss during the actuation of the actuator 200 and achieve a rapid reactivation, the opening pressure of the third check valve 113 is as small as possible, and the opening pressure of the fourth check valve 114 is significantly greater than the opening pressure of the first check valve 111, thereby achieving a rapid build-up of pressure.
In another alternative embodiment of the present utility model, the oil inlet of the third check valve 113 is connected to the second oil port 122, and the oil outlet of the third check valve 113 is used to connect to the other oil port of the actuator 200; wherein the opening pressure of the fourth check valve 114 is less than the operating pressure of the actuator 200. That is, the opening pressure of the fourth check valve 114 may be greater than the opening pressure of the third check valve 113, while being less than the operating pressure of the actuator 200.
Of course, the opening pressure of the fourth check valve 114 may be only smaller than the operating pressure of the actuator 200, and may be equal to the opening pressure of the third check valve 113 or even smaller than the opening pressure of the third check valve 113.
The utility model also provides a hydraulic system, which comprises an oil source, an oil tank, an actuating mechanism 200 and the control valve group 100 in the embodiment; the oil source is connected with the main valve 101, the oil tank is connected with the oil return port 123, one oil port of the actuating mechanism 200 is connected with the first check valve group 102, and the oil port of the actuating mechanism 200 is connected with the second oil port 122. Wherein, the oil source connects the P mouth, and the oil tank connects the T mouth.
For example, the main valve 101 includes a first oil inlet 124, the first oil inlet 124 is connected to an oil source, the first oil inlet 124 is connected to the first oil port 121 in the first working position, the first oil inlet 124 is connected to the second oil port 122 in the second working position, and the first oil inlet 124 is blocked in the neutral position.
Further, in other embodiments of the present utility model, the hydraulic system further includes a balancing valve group 210, where the balancing valve group 210 is disposed at an oil port of the actuator 200. The balancing valve group 210 includes a first balancing valve and a second balancing valve Heng Fa, the first balancing valve is disposed between the first check valve group 102 and the first working oil port 201, and the second balancing valve is disposed between the second check valve group 103 and the second working oil port 202.
With continued reference to FIG. 1, in one embodiment of the utility model, the hydraulic system further includes a compensating valve 104, the compensating valve 104 being connected between the source of oil and the main valve 101. The control port of the compensating valve 104 is connected to the load sensitive port LS of the hydraulic system and is provided with a fifth non-return valve 110. An oil inlet of the fifth one-way valve 110 is connected with a third oil port of the main valve 101 and a control oil port of the compensating valve 104, and an oil outlet of the fifth one-way valve 110 is connected with a load sensitive port LS of the hydraulic system.
The utility model also provides a working machine comprising the control valve group 100 of the above embodiment; alternatively, a work machine includes the hydraulic system of the above-described embodiment. The working machine can be a climbing vehicle, a fire truck, a crane and the like.
According to the control valve group 100 provided by the utility model, the first one-way valve group 102 is arranged at the first oil port 121 of the main valve 101, and the first one-way valve 111 and the second one-way valve 112 which are connected in parallel and have opposite conducting directions of the first one-way valve group 102 enable an oil return pipeline of the execution mechanism 200 to be filled with oil under the state that the first oil port 121 is communicated with the oil return port 123, so that the quick establishment of pressure during the action of the execution mechanism 200 is facilitated, and the response time of the execution action is reduced.
Further, in the hydraulic system and the working machine according to the present utility model, since the control valve group 100 as described above is provided, various advantages as described above are also provided.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (10)
1. A control valve assembly, comprising:
the main valve comprises a first oil port and an oil return port, wherein the first oil port is used for being connected with one oil port of the actuating mechanism, and in a state of one working position of the main valve, the first oil port is communicated with the oil return port which is used for being connected with an oil tank;
the first check valve group is connected to the first oil port, the first check valve group comprises a first check valve and a second check valve, the first check valve is connected with the second check valve in parallel, and the conduction direction of the first check valve is opposite to that of the second check valve.
2. The control valve set of claim 1, wherein an oil inlet of the first check valve is connected to the first oil port, and an oil outlet of the first check valve is connected to one oil port of the actuator;
wherein the opening pressure of the second one-way valve is greater than the opening pressure of the first one-way valve.
3. The control valve group of claim 1 or 2, wherein an oil inlet of the first check valve is connected to the first oil port, and an oil outlet of the first check valve is connected to one oil port of the actuator;
the opening pressure of the second one-way valve is smaller than the working pressure of the executing mechanism.
4. The control valve group according to claim 1 or 2, characterized in that the main valve further comprises a second oil port for connection with another oil port of the actuator, the second oil port being in communication with the oil return port in the state of one working position of the main valve;
the second check valve group is connected to the second oil port, the second check valve group comprises a third check valve and a fourth check valve, the third check valve is connected with the fourth check valve in parallel, and the conduction directions of the third check valve and the fourth check valve are opposite.
5. The control valve assembly of claim 4, wherein an oil inlet of the third check valve is connected to the second oil port, and an oil outlet of the third check valve is connected to another oil port of the actuator;
wherein the opening pressure of the fourth one-way valve is greater than the opening pressure of the third one-way valve.
6. The control valve assembly of claim 4, wherein an oil inlet of the third check valve is connected to the second oil port, and an oil outlet of the third check valve is connected to another oil port of the actuator;
the opening pressure of the fourth one-way valve is smaller than the working pressure of the executing mechanism.
7. A hydraulic system comprising a source of oil, an oil tank, an actuator, and the control valve assembly of any one of claims 1 to 6;
the oil source is connected with the main valve, the oil tank is connected with the oil return port, and one oil port of the actuating mechanism is connected with the first one-way valve group.
8. The hydraulic system of claim 7, further comprising a balancing valve group disposed at an oil port of the actuator.
9. The hydraulic system of claim 7, further comprising a compensating valve connected between the source of oil and the main valve.
10. A work machine comprising a control valve group according to any one of claims 1 to 6;
alternatively, the work machine comprises a hydraulic system according to any one of claims 7 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320248209.4U CN219176676U (en) | 2023-02-06 | 2023-02-06 | Control valve group, hydraulic system and operation machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320248209.4U CN219176676U (en) | 2023-02-06 | 2023-02-06 | Control valve group, hydraulic system and operation machine |
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| Publication Number | Publication Date |
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| CN219176676U true CN219176676U (en) | 2023-06-13 |
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| CN202320248209.4U Active CN219176676U (en) | 2023-02-06 | 2023-02-06 | Control valve group, hydraulic system and operation machine |
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| CN (1) | CN219176676U (en) |
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2023
- 2023-02-06 CN CN202320248209.4U patent/CN219176676U/en active Active
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