CN211501150U - Tandem type three-position four-way hydraulic reversing loop with composite action protection - Google Patents
Tandem type three-position four-way hydraulic reversing loop with composite action protection Download PDFInfo
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- CN211501150U CN211501150U CN201922335697.9U CN201922335697U CN211501150U CN 211501150 U CN211501150 U CN 211501150U CN 201922335697 U CN201922335697 U CN 201922335697U CN 211501150 U CN211501150 U CN 211501150U
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Abstract
The utility model relates to a tandem type tribit four-way hydraulic reversing circuit with composite action protection, which comprises a plurality of tribit four-way reversing valves, an overflow valve, a plurality of one-way valves, an oil inlet pipeline, an oil return pipeline, a main oil supply pipeline, a main oil return pipeline and a plurality of oil ports; the valve cores of the three-position four-way reversing valves are connected in series through matching of an oil inlet pipeline and an oil return pipeline, two ends of each three-position four-way reversing valve are connected with a main oil return pipeline of a main oil supply pipeline respectively to form a loop, a one-way valve is arranged between an oil inlet side pipeline of each three-position four-way reversing valve and the main oil supply pipeline, and an overflow valve is connected between the main oil supply pipeline and the main oil return pipeline. Meanwhile, protection elements are arranged on all the joint reversing valves, so that composite action protection can be realized, and the danger of pressurization and overpressure of the executing element caused by mistaken composite operation is avoided.
Description
Technical Field
The utility model belongs to the technical field of the hydraulic pressure switching-over valve, especially, relate to tandem type tribit cross hydraulic reversing circuit of area compound action protection.
Background
The multi-connected hydraulic reversing loop is a control valve block which is formed by physical superposition or logical combination and can control a plurality of hydraulic actions. The physical structure forms are various and can be of a sheet type, a superposition type, a plug-in type and the like. The multi-connection hydraulic reversing loop has the characteristics of compact structure, standard specification and strong expandability, and is widely applied to industrial and engineering hydraulic transmission control. The common multi-connection hydraulic reversing loop in the market at present is a parallel hydraulic reversing loop.
The principle of the parallel three-position four-way hydraulic reversing circuit is shown in figure 1. The valve group consists of a three-position four-way reversing valve 1, an unloading valve 2, an overflow valve 3, an oil inlet pipeline 4, an oil return pipeline 5 and oil ports. The control principle is as follows: when the hydraulic system is not operated, the unloading valve 2 is in a conducting state and an oil source is in an unloading state. When a certain working connection needs to work, the unloading valve 2 needs to be switched to a stop state, and the three-position four-way reversing valve 1 is switched to a working position through electric control or manual control, so that motion control is realized.
The problems existing at present are as follows: when the manual three-position four-way hydraulic reversing circuit is used, in order to realize one control action, the manual three-position four-way reversing valve and the unloading valve are required to be controlled simultaneously, the operation mode is complex in operation and poor in man-machine performance, and users have great complaints. When the electric control type three-position four-way hydraulic reversing loop is used, an electric system is required to simultaneously control the three-position four-way reversing valve electromagnet and the unloading valve electromagnet to realize one control action. And one unloading valve needs to be matched with a multi-connected three-position four-way reversing valve, a relay logic circuit needs to be built or a controller needs to be used, so that the control complexity is increased, the system reliability is reduced, and the manufacturing cost is increased.
SUMMERY OF THE UTILITY MODEL
The utility model provides a take tandem type tribit cross hydraulic reversing circuit of compound action protection, the main oil circuit of this method does not have the off-load valve, and each allies oneself with tribit cross valve case and advances oil pipe way and establishes ties. When the manual control or the electric control is carried out, only one control action is needed to be realized, and only one control is needed to control each valve core. Meanwhile, protection elements are arranged on all the joint reversing valves, so that composite action protection can be realized, and the danger of pressurization and overpressure of the executing element caused by mistaken composite operation is avoided.
In order to solve the problems in the background art, the utility model discloses a realize through following technical scheme: the tandem type three-position four-way hydraulic reversing circuit with the composite action protection comprises a plurality of three-position four-way reversing valves, an overflow valve, a plurality of one-way valves, an oil inlet pipeline, an oil return pipeline, a main oil supply pipeline, a main oil return pipeline and a plurality of oil ports;
the valve cores of the three-position four-way reversing valves are connected in series through matching of an oil inlet pipeline and an oil return pipeline, two ends of each three-position four-way reversing valve are respectively connected with a main oil return pipeline of a main oil supply pipeline to form a loop, a one-way valve is arranged between an oil inlet side pipeline of each three-position four-way reversing valve and the main oil supply pipeline, and one end of the main oil supply pipeline is connected with an overflow valve.
As a further explanation of the utility model: the middle position function of the three-position four-way reversing valve is not limited, and the P port and the T port are communicated without throttling only by the middle position.
As a further explanation of the utility model: the control form of the three-position four-way reversing valve is not limited to a manual control type, an electric control type and a manual control and electric control combined type.
As a further explanation of the utility model: and the three-position four-way hydraulic reversing circuit at least comprises a two-linkage three-position four-way reversing valve.
As a further explanation of the utility model: the one-way valve is of a non-opening pressure type or a low opening pressure type.
Compared with the prior art, the utility model discloses following profitable technological effect has:
1. the control of the required action can be realized through single manual control or electric control operation. The manual control mode is simple to operate and is man-machine friendly; the electric control mode can be realized through a simple circuit, the control complexity is greatly reduced, the system reliability is high, and the manufacturing cost is low. Meanwhile, a protection element is ingeniously formed by utilizing the one-way valve, so that the efficiency-cost ratio is high.
Drawings
FIG. 1 is a prior art structural drawing;
fig. 2 is a schematic structural diagram of embodiment 1 of the present invention;
fig. 3 is a schematic structural diagram of embodiment 2 of the present invention;
description of the reference numerals
1. A three-position four-way reversing valve; 2. an unloading valve; 3. an overflow valve; 4. an oil inlet pipeline; 5. an oil return line; 6. a one-way valve; 7. a main oil supply line.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1:
as shown in fig. 2, the tandem three-position four-way hydraulic reversing circuit with composite motion protection comprises two three-position four-way reversing valves 1, an overflow valve 3, two check valves 6, an oil inlet pipeline 4, an oil return pipeline 5, a main oil supply pipeline 7, a main oil return pipeline 5 and two oil ports;
specifically, the valve cores of two three-position four-way reversing valves 1 are connected in series through matching of an oil inlet pipeline 4 and an oil return pipeline 5, two ends of each three-position four-way reversing valve are respectively connected with a main oil return pipeline 5 of a main oil supply pipeline 7 to form a loop, a check valve 6 is arranged between the oil inlet side pipeline of each three-position four-way reversing valve 1 and the main oil supply pipeline 7, and one end of the main oil supply pipeline 7 is connected with an overflow valve 3.
The tandem type three-position four-way hydraulic reversing circuit with the compound action protection further comprises an M-type three-position four-way valve, but the function of a position in a three-position four-way reversing valve 1 is not limited, and only the position in the three-position four-way reversing valve 1 is required to ensure that a P port is communicated with a T port in a non-throttling mode; the control form of the three-position four-way reversing valve 1 is not limited to a manual control type, an electric control type and a manual control and electric control combined type; the three-position four-way hydraulic reversing loop at least comprises a two-linkage three-position four-way reversing valve 1; the check valve 6 is of a non-opening pressure type or a low opening pressure type.
Example 2:
as shown in fig. 2, the tandem three-position four-way hydraulic reversing circuit with composite motion protection includes four three-position four-way reversing valves 1, an overflow valve 3, four check valves 6, an oil inlet pipeline 4, an oil return pipeline 5, a main oil supply pipeline 7, a main oil return pipeline 5 and four oil ports;
specifically, four three-position four-way reversing valves 1 are connected in series through matching of an oil inlet pipeline 4 and an oil return pipeline 5, two ends of each three-position four-way reversing valve are connected with a main oil return pipeline 5 of a main oil supply pipeline 7 respectively to form a loop, a check valve 6 is arranged between an oil inlet side pipeline of each three-position four-way reversing valve 1 and the main oil supply pipeline 7, and one end of the main oil supply pipeline 7 is connected with an overflow valve 3.
The tandem type three-position four-way hydraulic reversing circuit with the compound action protection further comprises an M-type three-position four-way valve, but the function of a position in a three-position four-way reversing valve 1 is not limited, and only the position in the three-position four-way reversing valve 1 is required to ensure that a P port is communicated with a T port in a non-throttling mode; the control form of the three-position four-way reversing valve 1 is not limited to a manual control type, an electric control type and a manual control and electric control combined type; the three-position four-way hydraulic reversing loop at least comprises a two-linkage three-position four-way reversing valve 1; the check valve 6 is of a non-opening pressure type or a low opening pressure type.
The working principle is as follows:
when the hydraulic system is not operated, oil is directly returned through a serial channel formed by the valve core of each three-position four-way valve and the oil inlet and return pipelines 5, and the oil source is in an unloading state. When a certain working union needs to work, the valve core of the three-position four-way reversing valve 1 is directly pushed to a working position, then the valve group serial channel is divided into two, the oil inlet side of the valve core of the union becomes a high-pressure oil inlet channel, the oil return side of the valve core is a low-pressure oil return channel, and the actuator realizes action driving. When the user operates normally and independently, the one-way valve 6 is in a cut-off state. When two or more work couples are operated in a wrong composite mode, the series connection passage of the valve group is divided into three, the passage between the two work couples becomes an intermediate passage at the moment, the oil return of the previous execution element is connected with the oil inlet of the next execution element, the pressurization phenomenon easily occurs in the action process, the check valve 6 is opened at the moment, high-pressure oil is directly released into the main oil supply passage and then released through the overflow valve 3, and the function of pressurization overpressure protection is achieved.
The technique is further described using a four-way series three-position four-way hydraulic reversing circuit embodiment, as shown in fig. 3. The series three-position four-way hydraulic reversing loop is composed of a four-linkage three-position four-way hydraulic reversing loop and controls four hydraulic driving actions of a certain product. Two and three of the hydraulic cylinders are driven by hydraulic oil cylinders. Now, the protection principle of the compound action of the two triplets is explained: from the series channel, the oil firstly enters the third union, flows out of the third union and then enters the second union. Suppose that when the second linkage cylinder extends to the extreme position, the third linkage cylinder does not extend to the extreme position. At this time, the port A3 is connected with the large cylinder cavity, the port B3 is connected with the small cylinder cavity, when the pressure of the port A3 rises to the system overflow pressure, the pressurization phenomenon can occur due to the area difference of the two cavity surfaces of the cylinder, the pressure of the small cavity side can be larger than the system overflow pressure, namely the pressure of the oil inlet pipeline 4 is larger than the system overflow pressure. In severe cases, if the pressure ratio is high, the valve body and the cylinder body of the three-position four-way reversing valve 1 may deform or crack, and safety risks may occur. At the moment, the check valve 6 is arranged between the oil inlet side pipeline of the three-position four-way reversing valve 1 and the main oil supply pipeline 7, and the three-position four-way reversing valve 1 is opened when the pressure of the oil inlet side pipeline is greater than the pressure of the main oil supply pipeline 7, so that high-pressure oil is directly released into the main oil supply pipeline and then released through the overflow valve 3, and therefore the function of pressure boosting and overpressure protection is achieved.
The embodiments given above are preferred examples for implementing the present invention, and the present invention is not limited to the above-described embodiments. Any non-essential addition and replacement made by the technical features of the technical solution of the present invention by those skilled in the art all belong to the protection scope of the present invention.
Claims (5)
1. Take tandem type tribit four-way hydraulic reversing circuit of compound action protection, its characterized in that: the oil return device comprises a plurality of three-position four-way reversing valves (1), an overflow valve (3), a plurality of one-way valves (6), an oil inlet pipeline (4), an oil return pipeline (5), a main oil supply pipeline (7), a main oil return pipeline (5) and a plurality of oil ports;
the three-position four-way reversing valve comprises a plurality of three-position four-way reversing valves (1), wherein valve cores are connected in series through matching of an oil inlet pipeline (4) and an oil return pipeline (5), two ends of each three-position four-way reversing valve are connected with a main oil return pipeline (5) of a main oil supply pipeline (7) respectively to form a loop, a one-way valve (6) is arranged between an oil inlet side pipeline of each three-position four-way reversing valve (1) and the main oil supply pipeline (7), and one end of the main oil supply pipeline (7) is connected with an overflow.
2. The tandem type three-position four-way hydraulic reversing circuit with compound action protection as claimed in claim 1, wherein: the three-position four-way reversing valve (1) has no restriction on the position function, and only the position is required to ensure that the port P is communicated with the port T in a non-throttling mode.
3. The tandem type three-position four-way hydraulic reversing circuit with compound action protection as claimed in claim 1, wherein: the control form of the three-position four-way reversing valve (1) is not limited to a manual control type, an electric control type and a manual control and electric control combined type.
4. The tandem type three-position four-way hydraulic reversing circuit with compound action protection as claimed in claim 1, wherein: the three-position four-way hydraulic reversing circuit at least comprises a two-linkage three-position four-way reversing valve (1).
5. The tandem type three-position four-way hydraulic reversing circuit with compound action protection as claimed in claim 1, wherein: the one-way valve (6) is of a non-opening pressure type or a low-opening pressure type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922335697.9U CN211501150U (en) | 2019-12-24 | 2019-12-24 | Tandem type three-position four-way hydraulic reversing loop with composite action protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922335697.9U CN211501150U (en) | 2019-12-24 | 2019-12-24 | Tandem type three-position four-way hydraulic reversing loop with composite action protection |
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| Publication Number | Publication Date |
|---|---|
| CN211501150U true CN211501150U (en) | 2020-09-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922335697.9U Active CN211501150U (en) | 2019-12-24 | 2019-12-24 | Tandem type three-position four-way hydraulic reversing loop with composite action protection |
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| CN (1) | CN211501150U (en) |
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- 2019-12-24 CN CN201922335697.9U patent/CN211501150U/en active Active
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Address after: 710200 Jingwei Industrial Park, economic development zone, Xi'an City, Shaanxi Province Patentee after: Shaanxi Automobile Group Co.,Ltd. Address before: 710200 Jingwei Industrial Park, Xi'an Economic and Technological Development Zone, Shaanxi Province Patentee before: SHAANXI AUTOMOBILE GROUP Co.,Ltd. |
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