CN217107641U - Multi-way valve controlled by double valve cores - Google Patents
Multi-way valve controlled by double valve cores Download PDFInfo
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- CN217107641U CN217107641U CN202220777230.9U CN202220777230U CN217107641U CN 217107641 U CN217107641 U CN 217107641U CN 202220777230 U CN202220777230 U CN 202220777230U CN 217107641 U CN217107641 U CN 217107641U
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- unloading
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- pressure reducing
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Abstract
The utility model discloses a multi-way valve controlled by double valve cores, which comprises a main valve body and an oil inlet joint; a first valve core and a second valve core are coaxially arranged in the main valve body; a first electric proportional pressure reducing valve and a second electric proportional pressure reducing valve are arranged on one side of the main valve body, a valve core end cover is arranged on the other side of the main valve body, and a pilot oil way is arranged in the valve core end cover; the top of the main valve body is provided with a pressure compensator which is communicated with a first valve core and a second valve core below the pressure compensator; an oil inlet is formed in the top surface of the oil inlet joint; an oil outlet is arranged on one side of the oil inlet joint, a pressure reducing valve is arranged above the oil outlet, and an unloading valve is arranged at the position, opposite to the oil outlet, of the other side of the oil inlet joint; the oil inlet is communicated with the unloading valve, and the unloading valve is communicated with the oil outlet; the movement of the first valve core and the second valve core is controlled by adjusting the current of the first electro-proportional pressure reducing valve and the second electro-proportional pressure reducing valve independently or simultaneously. The utility model discloses speed and displacement that can accurate control hydro-cylinder, and do not need additionally to increase the hydraulic pressure lock.
Description
Technical Field
The utility model relates to a hydraulic control technique, concretely relates to multiple unit valve of double-valve-core control.
Background
In the hydraulic system of the existing mobile machinery, in order to improve the efficiency of the hydraulic system, save energy consumption and improve the operating performance. The common three-position four-way multi-way valve is usually adopted, one valve core is used for controlling the direction of an oil path, the valve core is operated to change the direction in a manual control mode, and only one oil cylinder can be controlled by one valve core. This patent adopts the electric proportional control mode, but two case synchronous working of single-link double-valve core structure proportional control.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: an object of the utility model is to provide a can effectively solve the speed control problem of hydro-cylinder, need not the multiple unit valve of the double-valve-core control of extra increase hydraulic pressure lock.
The technical scheme is as follows: the utility model comprises a main valve body and an oil inlet joint connected with the front side of the main valve body; a first valve core and a second valve core are horizontally and coaxially arranged in the main valve body; a first electric proportional pressure reducing valve and a second electric proportional pressure reducing valve are arranged at the positions of one side of the main valve body opposite to the second valve core, a valve core end cover is arranged at the position of the other side of the main valve body opposite to the first valve core, and a pilot oil way is arranged in the valve core end cover; the top of the main valve body is provided with a pressure compensator which is communicated with a first valve core and a second valve core below the pressure compensator; an oil inlet is formed in the top surface of the oil inlet joint; an oil outlet is arranged on one side of the oil inlet joint, a pressure reducing valve is arranged above the oil outlet, and an unloading valve is arranged at the position, opposite to the oil outlet, of the other side of the oil inlet joint; the oil inlet is communicated with the unloading valve, and the unloading valve is communicated with the oil outlet; the movement of the first valve core and the second valve core is controlled by adjusting the current of the first electro-proportional pressure reducing valve and the second electro-proportional pressure reducing valve independently or simultaneously.
The side surface of the main valve body is provided with an electric control driving block, the side surface of the electric control driving block is longitudinally provided with a first electric proportional pressure reducing valve and a second electric proportional pressure reducing valve, and the electric control driving block drives the electric proportional pressure reducing valves to act.
The pressure compensator comprises a compensator valve seat, a compensator spring and a compensator valve core, wherein the compensator spring is connected between the compensator valve seat and the compensator valve core, the compensator valve seat is fixed, and oil passes through the compensator valve core after the compensator valve core is upwards jacked open.
The unloading valve comprises an unloading valve core, a groove is formed in the side face of the unloading valve core and used for mounting a small unloading valve spring, a large unloading valve spring is sleeved outside the small unloading valve spring, and an unloading valve gasket is arranged between the large unloading valve spring and the unloading valve core; when the valve core is not reversed, oil in the oil inlet can pass through the valve core of the unloading valve, and returns to the oil tank after the small spring of the unloading valve and the large spring of the unloading valve are jacked open.
The unloading valve comprises an unloading valve seat, a cavity is arranged in the unloading valve seat, a small unloading valve spring and a large unloading valve spring are located in the cavity, an unloading valve plug is arranged on the side face of the unloading valve seat and communicated with the cavity, and the unloading valve plug is used for discharging air in the cavity of the unloading valve.
And an overflow valve is arranged on the top surface of the oil inlet joint and used for controlling the system pressure of the whole valve.
And safety valves are arranged on two sides of the main valve body, and when the load reaches the set pressure of the safety valves, valve cores of the safety valves can be opened, so that high-pressure oil returns to the oil tank.
Has the advantages that: compared with the prior art, the technical scheme of the utility model, its beneficial effect lies in: (1) the movement of the first valve core and the second valve core is controlled by independently or simultaneously adjusting the current of the first electro-proportional pressure reducing valve and the second electro-proportional pressure reducing valve, the displacement of the valve cores is the stroke of a hydraulic cylinder, the hydraulic cylinder is used as a hydraulic actuating element, and the movement speed and the stroke of the hydraulic cylinder are adjusted by controlling the flow of the hydraulic actuating element through the electro-proportional pressure reducing valve; that is, the magnitude of the pilot pressure is in direct proportion to the magnitude of the force for pushing the valve core, that is, the larger the current of the electro-proportional pressure reducing valve is, the larger the opening of the valve core is moved, that is, the larger the flow is; (2) the hydraulic cylinder has the characteristics of quick response and high precision, and can well control the expansion and contraction speed of the hydraulic cylinder; (3) the valve body is suitable for operation of multiple execution elements, and simultaneously, a plurality of valve bodies can be superposed to realize electric proportional control.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a longitudinal cross-sectional view of the main valve body of FIG. 1;
fig. 4 is a longitudinal sectional view of the oil feed union of fig. 1.
Detailed Description
The technical solution of the present invention will be described in detail with reference to the following detailed description and the accompanying drawings.
As shown in fig. 1 to fig. 3, the utility model discloses a main valve body 5 allies oneself with 2 with the oil feed, and the oil feed allies oneself with 2 to be connected at the main valve body 5 openly, and through bolted connection, the centre forms a whole through the sealing washer is sealed between the main valve body 5 and the oil feed allies oneself with 2. The main valve body 5 is horizontally provided with a first valve core 11 and a second valve core 15, and the first valve core 11 and the second valve core 15 are coaxially arranged. An electric proportional pressure reducing valve is arranged at the position of one side of the main valve body 5, which is opposite to the second valve core 15; specifically, an electric control driving block 16 is arranged on the side surface of the main valve body 5, and a first electric proportional pressure reducing valve 17 and a second electric proportional pressure reducing valve 18 are longitudinally arranged on the side surface of the electric control driving block 16. The second valve spool 15 extends partially into the electronically controlled drive block 16. A valve core end cover 12 is arranged at the position of the other side of the main valve body 5 opposite to the first valve core 11, and a pilot oil path 13 is arranged in the valve core end cover 12. The first valve core 11 partially extends into the valve core end cover 12. The top of the main valve body 5 is provided with a pressure compensator which is communicated with a first valve core 11 and a second valve core 15 below the pressure compensator; specifically, the pressure compensator comprises a compensator valve seat 6, a compensator spring 7 and a compensator valve core 8, wherein the compensator spring 7 is connected between the compensator valve seat 6 and the compensator valve core 8, the compensator valve seat 6 is fixed on the top surface of the main valve body 5, the left side of the compensator valve core 8 is communicated with the second valve core 15, and the right side of the compensator valve core 8 is communicated with the first valve core 11. Two side surfaces of the main valve body 5 are respectively provided with a safety valve 9, the two safety valves 9 are symmetrically arranged, and the safety valve 9 on the right side is positioned above the electric control driving block 16.
As shown in fig. 1 and 4, an oil inlet 3 and a relief valve 19 are arranged on the top surface of the oil inlet union 2; the oil is fed by the oil feeding connector 2 and enters the pressure compensator through the oil duct, and the hydraulic oil discharged from the pressure compensator passes through the valve core of the proportional valve to output the flow of a single oil port or double oil ports. The relief valve 19 is mounted in a threaded cartridge manner, and can control the system pressure of the entire valve. An oil outlet is formed in one side of the oil inlet joint 2, a pressure reducing valve 1 is arranged above the oil outlet, the pressure reducing valve 1 is used for changing high-pressure oil into low-pressure pilot oil after passing through the pressure reducing valve 1, the pilot oil passing through the pressure reducing valve 1 is supplied to the electric proportional pressure reducing valve, and the pressure of the electric proportional pressure reducing valve controls the displacement of the double valve cores; an unloading valve is arranged at the position of the other side of the oil inlet joint 2, which is opposite to the oil outlet; the oil inlet 3 is communicated with an unloading valve which is communicated with the oil outlet. The unloading valve comprises an unloading valve core 20, a groove is formed in the side face of the unloading valve core 20 and used for mounting an unloading valve small spring 23, an unloading valve large spring 22 is sleeved outside the unloading valve small spring 23, and an unloading valve gasket 21 is arranged between the unloading valve large spring 22 and the unloading valve core 20; the unloading valve further comprises an unloading valve seat 4, a cavity is arranged in the unloading valve seat 4, a small unloading valve spring 23 and a large unloading valve spring 22 are located in the cavity, an unloading valve plug 24 is arranged on the side face of the unloading valve seat 4, the unloading valve plug 24 is communicated with the cavity, and the unloading valve plug 24 is used for discharging air in the cavity of the unloading valve when the unloading valve plug 24 is pulled out. The unloading valve is arranged to ensure that when the valve core is not reversed, oil in the oil inlet 3 can return to the oil tank after jacking the small unloading valve spring 23 and the large unloading valve spring 22 through the valve core 20 of the unloading valve.
Hydraulic oil enters an oil inlet 3 of the oil inlet joint 2, when the first electric proportional pressure reducing valve 17 and the second electric proportional pressure reducing valve 18 do not work, the first valve core 11 and the second valve core 15 are in a middle position state, and the hydraulic oil in the oil inlet 3 returns to an oil tank through an oil outlet through a 4 unloading valve; when the first electro-proportional pressure reducing valve 17 and the second electro-proportional pressure reducing valve 18 are energized, pilot oil will come out from the pressure reducing valve 1, and the pilot oil pushes the first valve spool 11 and the second valve spool 15 through the pilot oil path 13. After the first valve core 11 and the second valve core 15 move, the hydraulic oil reaches the main valve body 5 through the oil inlet 3, and after the compensator valve core 8 of the pressure compensator is jacked open, the hydraulic oil flows from the working oil port to the executing part through the oil duct. The function of the pressure compensation valve is that the load pressure is independent of the flow, and in the case of load changes, a constant flow can still be achieved. After passing through the pressure compensation valve core, the oil liquid can reach the working cavity and is connected with the oil cylinder. In this embodiment, the first electro-proportional pressure reducing valve 17 and the second electro-proportional pressure reducing valve 18 adopt proportional solenoids, and the displacement of the valve core of the solenoid valve can be controlled by adjusting the current to 0 to 750 mA. The pilot drives the electric proportional pressure reducing valve, and pilot pressure provides reversing power for the electric proportional pressure reducing valve, so that the electric proportional pressure reducing valve is controlled through current respectively, and the valve core can stay at any position. The current is in direct proportion to the pilot pressure, and the magnitude of the pilot pressure is in direct proportion to the magnitude of the force for pushing the valve core, namely the larger the current of the electromagnetic valve is, the larger the opening of the valve core is moved.
Claims (7)
1. The utility model provides a multiple unit valve of double valve core control which characterized in that: comprises a main valve body (5) and an oil inlet connector (2) connected to the front surface of the main valve body (5); a first valve core (11) and a second valve core (15) are horizontally and coaxially arranged in the main valve body (5); a first electric proportional pressure reducing valve (17) and a second electric proportional pressure reducing valve (18) are arranged at the position of one side of the main valve body (5) opposite to the second valve core (15), a valve core end cover (12) is arranged at the position of the other side of the main valve body opposite to the first valve core (11), and a pilot oil circuit (13) is arranged in the valve core end cover (12); the top of the main valve body (5) is provided with a pressure compensator which is communicated with a first valve core (11) and a second valve core (15) below the pressure compensator;
an oil inlet (3) is formed in the top surface of the oil inlet joint (2); an oil outlet is formed in one side of the oil inlet joint (2), a pressure reducing valve (1) is arranged above the oil outlet, and an unloading valve is arranged at the position, opposite to the oil outlet, of the other side of the oil inlet joint; the oil inlet (3) is communicated with an unloading valve, and the unloading valve is communicated with the oil outlet; the movement of the first valve core (11) and the second valve core (15) is controlled by adjusting the current of the first electro-proportional pressure reducing valve (17) and the second electro-proportional pressure reducing valve (18) independently or simultaneously.
2. The dual spool controlled multiplex valve of claim 1, wherein: an electric control driving block (16) is arranged on the side face of the main valve body (5), and a first electric proportional pressure reducing valve (17) and a second electric proportional pressure reducing valve (18) are longitudinally arranged on the side face of the electric control driving block (16).
3. The dual spool controlled multiplex valve of claim 1, wherein: the pressure compensator comprises a compensator valve seat (6), a compensator spring (7) and a compensator valve core (8), wherein the compensator spring (7) is connected between the compensator valve seat (6) and the compensator valve core (8).
4. The dual spool controlled multiplex valve of claim 1, wherein: the unloading valve comprises an unloading valve core (20), a groove is formed in the side face of the unloading valve core (20) and used for mounting a small unloading valve spring (23), a large unloading valve spring (22) is sleeved outside the small unloading valve spring (23), and an unloading valve gasket (21) is arranged between the large unloading valve spring (22) and the unloading valve core (20).
5. The dual spool controlled multiplex valve of claim 4, wherein: the unloading valve further comprises an unloading valve seat (4), a cavity is arranged in the unloading valve seat (4), a small unloading valve spring (23) and a large unloading valve spring (22) are located in the cavity, an unloading valve plug (24) is arranged on the side face of the unloading valve seat (4), and the unloading valve plug (24) is communicated with the cavity.
6. The dual spool controlled multiplex valve of claim 1, wherein: and an overflow valve (19) is arranged on the top surface of the oil inlet joint (2).
7. The dual spool controlled multiplex valve of claim 1, wherein: safety valves (9) are arranged on two sides of the main valve body (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220777230.9U CN217107641U (en) | 2022-03-31 | 2022-03-31 | Multi-way valve controlled by double valve cores |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220777230.9U CN217107641U (en) | 2022-03-31 | 2022-03-31 | Multi-way valve controlled by double valve cores |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217107641U true CN217107641U (en) | 2022-08-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220777230.9U Active CN217107641U (en) | 2022-03-31 | 2022-03-31 | Multi-way valve controlled by double valve cores |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217107641U (en) |
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2022
- 2022-03-31 CN CN202220777230.9U patent/CN217107641U/en active Active
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