CN215890634U - Load sensitive piece formula multiple unit valve - Google Patents
Load sensitive piece formula multiple unit valve Download PDFInfo
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- CN215890634U CN215890634U CN202121144917.0U CN202121144917U CN215890634U CN 215890634 U CN215890634 U CN 215890634U CN 202121144917 U CN202121144917 U CN 202121144917U CN 215890634 U CN215890634 U CN 215890634U
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Abstract
The utility model relates to the technical field of hydraulic pressure, in particular to a load sensitive sheet type multi-way valve, which comprises a valve body, a valve core hole, a working oil cavity communicated with the valve core hole, an oil inlet cavity and an oil return cavity, wherein the oil inlet cavity is connected with an oil inlet, and the oil return cavity is connected with an oil return port; the pressure compensation cavity is internally provided with a pressure compensation valve, a compensation oil inlet cavity and a compensation oil outlet cavity are connected between the pressure compensation cavity and the valve core hole, and the valve core is arranged in the valve core hole and used for oil circuit conversion; the check mechanism is arranged between the oil inlet and the valve core hole, and the oil can be prevented from reversely flowing back to the oil inlet in the pressure building process of the pump, so that the falling phenomenon of the actuating mechanism is avoided.
Description
Technical Field
The utility model relates to the technical field of hydraulic pressure, in particular to a load sensitive sheet type multi-way valve.
Background
The load sensitive plate type multi-way valve is applied to various hydraulic control systems which need to control the composite action of two or more actuating mechanisms, so that the flow distribution of the multiple actuating mechanisms is more coordinated during the composite operation, but the existing load sensitive plate type multi-way valve has the following problems: for example, in a patent with the name of CN201710776647.7, which is named as a hydraulic multi-way valve, when there is an external load pressure, during the pressure build process of the main pump, the working port oil flows back to the port P in a reverse direction, for example, when the operation valve core is reversed, when the boom of the excavator rises, the boom falls and rises again, which affects the operation precision.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that the oil liquid of the load sensitive plate type multi-way valve reversely flows back under the external load pressure in the prior art, the utility model provides the load sensitive plate type multi-way valve which solves the problem that the oil liquid of the load sensitive plate type multi-way valve reversely flows back under the external load pressure.
The technical scheme adopted by the utility model for solving the technical problems is as follows:
a load sensing wafer multiplex valve comprising:
the valve comprises a valve body, wherein a valve core hole, a working oil cavity communicated with the valve core hole, an oil inlet cavity and an oil return cavity are arranged in the valve body, the oil inlet cavity is connected with an oil inlet, and the oil return cavity is connected with an oil return port;
a pressure compensation cavity, a pressure compensation valve is arranged in the pressure compensation cavity, a compensation oil inlet cavity and a compensation oil outlet cavity are connected between the pressure compensation cavity and the valve core hole,
the valve core is arranged in the valve core hole and used for oil circuit conversion;
the check structure is arranged between the oil inlet and the valve core hole.
Furthermore, the valve body is internally provided with a one-way valve hole connected with the oil inlet cavity, and the non-return mechanism is a one-way valve arranged in the one-way valve hole.
Furthermore, the number of the oil inlet cavity and the check valve is one. The load port shares an oil inlet cavity and a one-way valve, so that the structure is simple, and the cost is saved.
Furthermore, the compensation oil outlet cavities correspond to the working oil cavities one by one.
Furthermore, the compensation oil outlet cavity is close to the corresponding working oil return cavity. The runner is simplified, the stroke of the oil from the oil inlet to the working cavity is shortened, and the oil consumption is low.
Further, the working oil chamber comprises a first working oil chamber and a second working oil chamber, and the compensation oil outlet chamber comprises a first compensation oil outlet chamber corresponding to the first working oil chamber and a second compensation oil outlet chamber corresponding to the second working oil chamber.
Furthermore, the first compensation oil outlet cavity and the second compensation oil outlet cavity are connected into a complete bridge circuit. The hydraulic oil, which facilitates the output of the compensator valve, is output in one direction along the bridge.
Furthermore, the oil return cavity comprises a first oil return cavity and a second oil return cavity which are in one-to-one correspondence with the working oil cavities. The oil return cavities correspond to the working oil cavities one by one, oil can be returned quickly, and efficiency is improved.
Furthermore, a safety valve hole is arranged between the working oil cavity and the oil return cavity, and a safety valve is arranged in the safety valve hole.
Furthermore, an Ls feedback flow channel is arranged in the pressure compensation cavity, and the Ls feedback flow channel is externally connected with an LS feedback oil path.
Has the advantages that:
(1) the check mechanism is arranged between the oil inlet and the valve core hole, so that the oil can be prevented from reversely flowing back to the oil inlet in the pressure building process of the pump, and the falling phenomenon of the actuating mechanism is avoided;
(2) the first compensation oil outlet cavity and the second compensation oil outlet cavity are arranged on two sides of the compensation valve and are in one-to-one correspondence with and close to the working oil cavities, so that a flow channel is simplified, the stroke of oil from the oil inlet to the working cavity is shortened, and oil consumption is low.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a state diagram of the load sensing plate type multi-way valve of the present invention in a neutral position;
FIG. 2 is a state diagram of the load sensing plate type multi-way valve of the present invention in the right position;
FIG. 3 is a state diagram of the load sensing plate type multi-way valve of the present invention in the left position;
fig. 4 is a working state diagram of the load sensing plate type multi-way valve of the utility model.
The valve plate assembly comprises a valve plate assembly 1, a valve plate assembly 2, a valve plate assembly P, a feedback oil circuit 3, a feedback oil circuit Ls, an oil return circuit 4, a valve plate assembly T, a valve plate assembly head-connected with the valve plate assembly 6, a valve plate assembly tail-connected with the valve plate assembly 7, a safety valve 8, a valve body 9, a one-way valve 10, a compensation valve 11, a valve core 12, a first oil inlet flow passage 13, a second oil inlet oil passage 14, a compensation oil inlet cavity 15, a compensation oil outlet cavity 151, a first compensation oil outlet cavity 152, a second compensation oil outlet cavity 16, a first working oil cavity 17, a second working oil cavity 18, a first oil return cavity 19, a second oil return cavity 20 and a feedback flow passage Ls.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" may be used herein for convenience in describing, and relative terms in space such as "above … …", "above … …", "above … …", "above", and the like, may be used to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
Referring to fig. 1, a load sensing plate type multi-way valve includes:
the valve comprises a valve body 1, wherein a valve core hole, a working oil cavity communicated with the valve core hole, an oil inlet cavity and an oil return cavity are arranged in the valve body 1, the oil inlet cavity is connected with an oil inlet, and the oil return cavity is connected with an oil return port;
a pressure compensation cavity, a pressure compensation valve 10 is arranged in the pressure compensation cavity, a compensation oil inlet cavity 14 and a compensation oil outlet cavity 15 are connected between the pressure compensation cavity and the valve core hole,
the valve core 11 is arranged in the valve core hole and used for oil circuit conversion;
the non-return mechanism is arranged between the oil inlet and the valve core hole.
The valve body 1 is also internally provided with a one-way valve hole connected with the oil inlet cavity, the non-return mechanism is a one-way valve 9 arranged in the one-way valve hole, and the non-return mechanism can be other non-return valves and the like. The one-way valve hole divides the oil inlet cavity into a first oil inlet flow passage 12 and a second oil inlet flow passage 13.
The number of the oil inlet cavity and the one-way valve 9 is one.
The compensation oil outlet cavities 15 correspond to the working oil cavities one by one. The compensation oil outlet cavity 15 is close to the corresponding working oil return cavity. The working-oil chamber includes a first working-oil chamber 16 and a second working-oil chamber 17, and the compensation oil outlet chamber 15 includes a first compensation oil outlet chamber 151 corresponding to the first working-oil chamber 16 and a second compensation oil outlet chamber 152 corresponding to the second working-oil chamber 17. The first oil outlet chamber 151 and the second oil outlet chamber 152 are connected as a complete bridge.
The oil return chambers include a first oil return chamber 18 and a second oil return chamber 19 in one-to-one correspondence with the working oil chambers.
A safety valve hole is arranged between the working oil cavity and the oil return cavity, and a safety valve 7 is arranged in the safety valve hole.
An Ls feedback flow channel 20 is arranged in the pressure compensation cavity, and the Ls feedback flow channel 20 is externally connected with an LS feedback oil circuit 3.
The valve core 20 is configured to be movable between at least a first position and a second position, and the valve body 20 may be provided with a control oil port communicated with the valve core hole to control the movement of the valve core 20, but the movement of the valve core 20 may be realized in other forms.
As an application example of the load-sensitive multi-way valve of the present invention: can be used in engineering machine tool, like figure 4, for whole hydraulic pressure schematic diagram, including a plurality of utility model's valve block assembly 1, P oil feed oil circuit 2, T oil return oil circuit 4 and the variable pump of load sensitive formula multiple unit valve, nearest being head-coupled valve block assembly 5 from the variable pump, furthest being tail-coupled valve block assembly 6 from the variable pump, valve block assembly 1's number can set up according to actual demand. The working oil port A is connected with a first cavity at the left end of an oil cylinder of the actuating mechanism, and the working oil port B is connected with a second cavity at the right end of the oil cylinder of the actuating mechanism. The LS feedback oil circuit 3 feeds the pressure of the compensating valve 10 back to the variable pump, and the variable pump provides enough working flow according to the feedback pressure, so that the continuous work of the actuating mechanism is realized.
The specific action principle is as follows:
1) as shown in fig. 2, when the valve core 11 moves rightwards, the oil in the P oil inlet enters the working oil port a through the first oil inlet flow passage 12, the one-way valve hole, the second oil inlet flow passage 13, the valve core hole, the compensation oil inlet chamber flow passage 14, the compensation valve 10, the first compensation oil outlet chamber 151, the valve core hole and the first working oil chamber 16, and the working oil port a moves rightwards due to the pushing of the actuating mechanism; the oil in the working oil port B enters a T oil return port through a second working oil chamber 17, a valve core hole and a second oil return chamber 19, meanwhile, one path of oil in the compensation oil inlet chamber 14 enters an LS feedback flow passage 20 through a compensation valve 10, the LS feedback flow passage 20 is communicated with an LS feedback oil path 3, the pressure of the compensation oil inlet chamber 14 is fed back to the variable pump, sufficient working flow is provided according to the feedback pressure, and continuous work of an actuating mechanism is realized;
2) as shown in fig. 3, when the valve core 11 moves leftward, the oil from the port P enters the working oil port B through the first oil inlet flow passage 12, the check valve hole, the second oil inlet flow passage 13, the valve core hole, the compensation oil inlet chamber 14, the compensation valve 10, the second compensation oil outlet chamber 152, the valve core hole, and the second working oil chamber 17, and the oil from the working oil port B pushes the actuator to move leftward; the oil in the working oil port A enters the T oil return port through the first working oil chamber 16, the valve core hole and the first oil return chamber 18, meanwhile, one path of oil in the compensation oil inlet chamber 14 enters the LS feedback flow passage 20 through the compensation valve 10, the LS feedback flow passage 20 is communicated with the LS feedback oil path 3, the pressure of the compensation oil inlet chamber 14 is fed back to the variable displacement pump, sufficient working flow is provided according to the feedback pressure, and continuous work of the actuating mechanism is achieved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.
Claims (10)
1. A load sensing plate type multi-way valve is characterized by comprising:
the oil-return valve comprises a valve body (1), wherein a valve core hole, a working oil cavity communicated with the valve core hole, an oil inlet cavity and an oil return cavity are arranged in the valve body (1), the oil inlet cavity is connected with an oil inlet, and the oil return cavity is connected with an oil return port;
a pressure compensation cavity, a pressure compensation valve (10) is arranged in the pressure compensation cavity, a compensation oil inlet cavity (14) and a compensation oil outlet cavity (15) are connected between the pressure compensation cavity and the valve core hole,
the valve core (11), the said valve core (11) is put into valve core hole and used for the oil circuit to change;
the check structure is arranged between the oil inlet and the valve core hole.
2. The load sensing wafer multiplex valve of claim 1 further comprising: the check valve is characterized in that a check valve hole connected with the oil inlet cavity is further formed in the valve body (1), and the check mechanism is a check valve (9) arranged in the check valve hole.
3. The load sensing wafer multiplex valve of claim 2 wherein: the number of the oil inlet cavities and the number of the one-way valves (9) are both one.
4. The load sensing wafer multiplex valve of claim 1 further comprising: the compensation oil outlet cavities (15) correspond to the working oil cavities one by one.
5. The load sensing wafer multiplex valve of claim 4 wherein: the compensation oil outlet cavity (15) is close to the corresponding working oil return cavity.
6. The load sensing wafer multiplex valve of claim 5 wherein: the working oil chamber comprises a first working oil chamber (16) and a second working oil chamber (17), and the compensation oil outlet chamber (15) comprises a first compensation oil outlet chamber (151) corresponding to the first working oil chamber (16) and a second compensation oil outlet chamber (152) corresponding to the second working oil chamber (17).
7. The load sensing wafer multiplex valve of claim 4 wherein: the first compensation oil outlet cavity (151) and the second compensation oil outlet cavity (152) are connected as a complete bridge.
8. The load sensing wafer multiplex valve of claim 1 further comprising: the oil return cavities comprise a first oil return cavity (18) and a second oil return cavity (19) which correspond to the working oil cavities one by one.
9. The load sensing wafer multiplex valve of claim 1 further comprising: and a safety valve hole is arranged between the working oil cavity and the oil return cavity, and a safety valve (7) is arranged in the safety valve hole.
10. The load sensing wafer multiplex valve of claim 1 further comprising: the pressure compensation cavity is internally provided with a Ls feedback flow channel (20), and the Ls feedback flow channel (20) is externally connected with an LS feedback oil circuit (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121144917.0U CN215890634U (en) | 2021-05-26 | 2021-05-26 | Load sensitive piece formula multiple unit valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121144917.0U CN215890634U (en) | 2021-05-26 | 2021-05-26 | Load sensitive piece formula multiple unit valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215890634U true CN215890634U (en) | 2022-02-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121144917.0U Active CN215890634U (en) | 2021-05-26 | 2021-05-26 | Load sensitive piece formula multiple unit valve |
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| Country | Link |
|---|---|
| CN (1) | CN215890634U (en) |
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2021
- 2021-05-26 CN CN202121144917.0U patent/CN215890634U/en active Active
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