CN216478127U - Pressure maintaining loop integrated valve block - Google Patents
Pressure maintaining loop integrated valve block Download PDFInfo
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- CN216478127U CN216478127U CN202122511381.8U CN202122511381U CN216478127U CN 216478127 U CN216478127 U CN 216478127U CN 202122511381 U CN202122511381 U CN 202122511381U CN 216478127 U CN216478127 U CN 216478127U
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Abstract
The utility model discloses a pressure maintaining loop integrated valve block, wherein the upper end of the valve block is provided with an A2 oil port and a B2 oil port which are used for externally connecting a working oil cylinder, the lower end of the valve block is provided with an A oil port and a B oil port which are connected with a hydraulic valve block, the side part of the A oil port is provided with a first overflow valve oil port used for installing an overflow valve, and the side part of the B oil port is provided with a second overflow valve oil port used for installing an overflow valve; one side of the valve block is provided with a one-way valve oil port I for mounting a one-way valve and an A1 oil port for externally connecting a working oil cylinder, and the other side of the valve block is provided with a one-way valve oil port II for mounting a one-way valve and a B1 oil port for externally connecting a working oil cylinder; the utility model discloses a can be applied to among the various hydraulic system, can realize hydraulic system: speed control, stable operation, pressure maintaining and the like; the valve block can realize the stable and same-speed operation of double cylinders or multiple cylinders.
Description
Technical Field
The utility model relates to an integrated valve block of a pressure maintaining loop, and belongs to the technical field of hydraulic control systems.
Background
The existing hydraulic power unit system, such as an electric engineering truck fork brick, a driven bidirectional hydraulic oil cylinder does not have a hydraulic circuit back pressure function, when the oil cylinder runs to drive equipment to run, the gravity center of the equipment is changed due to the change of the angle of the equipment, the direction of force acting on the oil cylinder is changed, the running speed of the oil cylinder is disturbed, the running speed of the oil cylinder is not stable, the oil supply in one end of a working cavity of the cylinder is not in time, the negative pressure condition occurs in the cylinder, and the result is that the running is not stable and the normal use of the equipment is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art and provides an integrated valve block of a pressure maintaining loop.
An A2 oil port and a B2 oil port for externally connecting a working oil cylinder are formed in the upper end of the valve block, an A oil port and a B oil port for connecting a hydraulic valve block are formed in the lower end of the valve block, a first overflow valve oil port for installing an overflow valve is formed in the side portion of the A oil port, and a second overflow valve oil port for installing an overflow valve is formed in the side portion of the B oil port;
one side of the valve block is provided with a one-way valve oil port I for installing a one-way valve and an A1 oil port for externally connecting a working oil cylinder, and the other side of the valve block is provided with a one-way valve oil port II for installing a one-way valve and a B1 oil port for externally connecting a working oil cylinder.
Furthermore, an oil inlet of the first check valve oil port is communicated with the oil port A, one end of an oil outlet is communicated with the oil port A1, and the other end of the oil outlet is connected with an oil inlet of the first overflow valve oil port.
Further, an oil outlet of the first overflow valve oil port is communicated with the oil port A.
Furthermore, an oil inlet of the second check valve oil port is communicated with the oil port B, one end of an oil outlet is communicated with the oil port B1, and the other end of the oil outlet is connected with an oil inlet of the second overflow valve oil port.
Further, an oil outlet of the overflow valve oil port II is communicated with the oil port B.
Further, the A2 oil port is communicated with the A1 oil port, and the B2 oil port is communicated with the B1 oil port.
Compared with the prior art, the utility model has the following beneficial effects: the utility model discloses a can be applied to among the various hydraulic system, cooperate overflow valve, check valve, can realize hydraulic system to the stall phenomenon that can not produce because of the direction of force changes when pressurize, the control hydro-cylinder that the operation is stable, realize that the hydro-cylinder has pole chamber and no pole chamber is flexible.
Drawings
FIG. 1 is a schematic view of the inlet oil operation of port A of the present invention;
FIG. 2 is a schematic view of the oil inlet operation at port B of the present invention;
FIG. 3 is a schematic diagram of the system of the present invention;
in the figure: 1. a check valve oil port I; 2. a check valve oil port II; 3. a first overflow valve oil port; 4. an overflow valve oil port II; 5. a2 oil port; 6. an oil port A; 7. an oil port B; 8. a1 oil port; 9. b1 oil port; 10. b2 oil port.
Detailed Description
The utility model is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
As shown in fig. 1-2, an integrated valve block of a pressure maintaining circuit is disclosed, wherein the upper end of the valve block is provided with an a2 oil port 5 and a B2 oil port 10 for externally connecting a working oil cylinder, the lower end of the valve block is provided with an a oil port 6 and a B oil port 7 for connecting a hydraulic valve block, the side of the a oil port 6 is provided with an overflow valve oil port one 3 for installing an overflow valve, and the side of the B oil port 7 is provided with an overflow valve oil port two 4 for installing an overflow valve;
one side of the valve block is provided with a one-way valve oil port I1 for mounting a one-way valve and an A1 oil port 8 for externally connecting a working oil cylinder, and the other side of the valve block is provided with a one-way valve oil port II 2 for mounting a one-way valve and a B1 oil port 9 for externally connecting a working oil cylinder; an oil inlet of the check valve oil port I1 is communicated with the oil port A6, one end of an oil outlet is communicated with the oil port A1 oil port 8, the other end of the oil outlet is connected with an oil inlet of the overflow valve oil port I3, and an oil outlet of the overflow valve oil port I3 is communicated with the oil port A6.
The oil inlet of the second check valve oil port 2 is communicated with the B oil port 7, one end of the oil outlet is communicated with the B1 oil port 9, the other end of the oil outlet is connected with the oil inlet of the second overflow valve oil port 4, and the oil outlet of the second overflow valve oil port 4 is communicated with the B oil port 7.
The A2 oil port 5 is communicated with the A1 oil port 8, and the B2 oil port 10 is communicated with the B1 oil port 9.
In this embodiment, the valve block center position is equipped with the fixed orifices, and the valve block of being convenient for when using, convenient fixed.
The working principle is as follows: the valve block is mainly applied to a hydraulic system, an A/B oil port is an oil inlet, and A1, A2, B1 and B2 are oil outlets;
1) when the oil inlet of the port A and the oil return of the port B work, the oil reaches the ports A1 and A2 through the first check valve and supplies oil to working mechanisms such as a hydraulic oil cylinder and the like (at the moment, the first overflow valve is in a closed state), meanwhile, the oil returned by the oil cylinder enters the valve block through the ports B1 and B2 (at the moment, the second check valve is in a closed state), the oil returned directly reaches the second overflow valve, after the resistance of the second overflow valve is overcome, the oil reaches the port B and flows back to the oil tank through the port B. (see the attached drawing I)
2) When the oil enters the port B and returns to the port A to work, the oil reaches the ports B1 and B2 through the check valve II and supplies oil to working mechanisms such as a hydraulic oil cylinder and the like (at the moment, the overflow valve II is in a closed state), meanwhile, the return oil of the oil cylinder enters the valve block through the ports A1 and A2 (at the moment, the check valve I is in a closed state), the return oil directly reaches the overflow valve I, after the resistance of the overflow valve I is overcome, the oil reaches the port A and flows back to the oil tank through the port A; (see figure two).
As shown in fig. 3, the hydraulic control system of the electric engineering brick forking truck comprises:
the oil pump is controlled by the two-way control switch to operate, and the electromagnetic directional valve is controlled to change direction at the same time:
when the rodless cavity supplies oil (the rod cavity returns oil) and the piston of the oil cylinder moves upwards, the check valve of the first check valve oil port 1 is opened, and the overflow valve of the first overflow valve oil port 3 is closed. The return oil of the rod cavity enters the integrated valve block through the oil port B1 and the oil port B2, and flows back to the oil tank through an overflow valve in the overflow valve oil port II and the oil port B.
On the contrary, when the rod cavity supplies oil (no rod cavity returns oil) and the piston of the oil cylinder moves downwards, the check valve II is opened and the overflow valve II is closed; the return oil of the rodless cavity enters the integrated valve block through an A1 oil port and an A2 oil port and flows back to the oil tank through a first overflow valve and an A port in an overflow valve oil port I3.
The running speed of the oil cylinder is stable and reliable and cannot be greatly changed due to the influence of other factors
Releasing the control switch, stopping the oil pump, enabling the electromagnetic directional valve to be in a neutral position, and enabling the system to enter a pressure maintaining state.
The third set value of the overflow valve in the system is larger than the first overflow valve and the second overflow valve, and the first overflow valve and the second overflow valve enable return oil of the system to generate back pressure, so that stable, stable and synchronous operation of multiple oil cylinders is guaranteed.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; 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 meanings of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (6)
1. An A2 oil port (5) and a B2 oil port (10) for externally connecting a working oil cylinder are formed in the upper end of the valve block, and an A oil port (6) and a B oil port (7) for connecting a hydraulic valve block are formed in the lower end of the valve block, and the integrated valve block is characterized in that a first overflow valve oil port (3) for installing an overflow valve is formed in the side portion of the A oil port (6), and a second overflow valve oil port (4) for installing an overflow valve is formed in the side portion of the B oil port (7);
one side of the valve block is provided with a one-way valve oil port I (1) for installing a one-way valve and an A1 oil port (8) for externally connecting a working oil cylinder, and the other side of the valve block is provided with a one-way valve oil port II (2) for installing a one-way valve and a B1 oil port (9) for externally connecting a working oil cylinder.
2. The pressure maintaining loop integrated valve block as claimed in claim 1, wherein an oil inlet of the check valve oil port I (1) is communicated with the oil port A (6), one end of an oil outlet is communicated with the oil port A1 (8), and the other end of the oil outlet is connected with an oil inlet of the overflow valve oil port I (3).
3. The pressure maintaining circuit integrated valve block as claimed in claim 1, wherein the oil outlet of the overflow valve port one (3) is communicated with the A port (6).
4. The pressure maintaining loop integrated valve block as claimed in claim 1, wherein an oil inlet of the check valve oil port II (2) is communicated with the oil port B (7), one end of an oil outlet is communicated with the oil port B1 (9), and the other end of the oil outlet is connected with an oil inlet of the overflow valve oil port II (4).
5. The pressure maintaining loop integrated valve block as claimed in claim 1, wherein the oil outlet of the overflow valve port two (4) is communicated with the B port (7).
6. The pressure maintaining circuit integrated valve block as claimed in claim 1, wherein the A2 oil port (5) is communicated with an A1 oil port (8), and the B2 oil port (10) is communicated with a B1 oil port (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122511381.8U CN216478127U (en) | 2021-10-19 | 2021-10-19 | Pressure maintaining loop integrated valve block |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122511381.8U CN216478127U (en) | 2021-10-19 | 2021-10-19 | Pressure maintaining loop integrated valve block |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216478127U true CN216478127U (en) | 2022-05-10 |
Family
ID=81441167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122511381.8U Active CN216478127U (en) | 2021-10-19 | 2021-10-19 | Pressure maintaining loop integrated valve block |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216478127U (en) |
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2021
- 2021-10-19 CN CN202122511381.8U patent/CN216478127U/en active Active
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