CN212479745U - Digital fluid pilot driven programmable control assembled hydraulic multi-way valve - Google Patents
Digital fluid pilot driven programmable control assembled hydraulic multi-way valve Download PDFInfo
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- CN212479745U CN212479745U CN202021402502.4U CN202021402502U CN212479745U CN 212479745 U CN212479745 U CN 212479745U CN 202021402502 U CN202021402502 U CN 202021402502U CN 212479745 U CN212479745 U CN 212479745U
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Abstract
The utility model discloses a digital fluid guide drives programmable control's assembled hydraulic pressure multiple unit valve. It includes unit safety valve and several unit working valves; the unit working valve comprises a valve body II, four high-speed switching valves, two one-way throttle valves and a three-position three-way proportional valve. The basis oil circuit of hydraulic pressure multiple unit valve is a proportional reversing valve of four high-speed ooff valves guide control, and a plurality of basis oil circuit are parallelly connected just a complete hydraulic pressure multiple unit valve, and the event makes a unit work valve that can assemble with four high-speed ooff valves and a switching-over proportional valve and oil circuit, the utility model discloses a position of the control tribit tee bend proportional valve case of opening and close of guide's high-speed ooff valve has realized the different flow and the pressure of tribit tee bend proportional valve load mouth. Each unit valve shares a pilot high-low pressure oil path and a main high-low pressure oil path, and the load port and the related oil paths are increased or decreased arbitrarily. In addition, the unit working valve provides four assembling surfaces, so that the arrangement and combination of any shape can be realized, and the flexibility is excellent.
Description
Technical Field
The utility model belongs to hydraulic pressure multiple unit valve field, concretely relates to assembled hydraulic pressure multiple unit valve of digital fluid guide drive programmable control.
Background
The hydraulic multiway valve is a combination of reversal valves for controlling several hydraulic actuators, and is a multifunctional integrated hydraulic valve with two or more reversal valves as main body and integrated switching valve, pressure reducing valve and safety valve. Compared with other types of valves, the multi-way reversing valve has the advantages of compact structure, simple pipeline, small pressure loss, long service life and the like, and becomes a control core of mobile multi-actuator hydraulic equipment such as excavators, overhead working trucks, aerospace and the like.
The proportional reversing valve is a direction control element commonly used in the hydraulic field, and the multi-way valve in the engineering machinery field is mostly controlled by hydraulic pilot. The traditional proportional valve is usually controlled by one valve core, the opening degrees of an inlet and an outlet of the valve are in linkage, and for a load needing to provide back pressure, the traditional proportional valve cannot independently adjust the pressure of the inlet and the pressure of the outlet of the valve, so that the waste of energy is caused.
The requirements of industrial production on the control precision and response speed of an electro-hydraulic control system are increasing, and the development of digital control technology, electro-hydraulic proportional technology and test sensing technology is continuing, various embedded sensors are embedded into hydraulic elements for monitoring relevant dynamic parameters in real time, and digital hydraulic elements which can be directly controlled by a computer represented by high-speed switching valves are also appeared. Therefore the utility model discloses combine high-speed switch technique and electric liquid proportion technique, realize closed-loop control, when improving control accuracy and stability, reduce working loss, extension oil circuit working life.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's not enough, provide digital fluid guide drive programmable control's assembled hydraulic pressure multiple unit valve. The utility model discloses a structure of double-valve core can adjust the aperture of each case alone, more has the flexibility. The valve core positions and the control modes of the load oil inlet and the load oil outlet are independent and do not influence each other, so that the pressure and the flow of the two oil ports can be controlled respectively, and the function which is difficult to realize in a hydraulic system of one valve core can be well solved by utilizing programming. The utility model discloses further divide single case and control circuit into a unit valve on double-valve-element's basis, this unit valve is for can assembled structure. The unit valves can be matched according to requirements, and the hydraulic control system with variable specifications and shapes can be realized. Compare with fixed structure, the utility model discloses a hydraulic pressure multiple unit valve, the flexibility ratio of oil circuit is higher.
The utility model discloses a digital fluid pilot-operated programmable control assembled hydraulic multi-way valve, which comprises a unit safety valve and a plurality of unit working valves;
the unit safety valve comprises a valve body I, a pressure reducing valve and a safety valve; the valve body I comprises a first assembly surface used for connecting an external oil path or an oil tank, and the first assembly surface is provided with a pilot oil path P port, a pilot oil path T port, a main oil path P port and a main oil path T port; the oil inlet and the oil outlet of the pressure reducing valve are respectively connected with a main oil way P port and a pilot oil way P port; the oil inlet and the oil outlet of the safety valve are respectively connected with a main oil way P port and a main oil way T port; the valve body I also comprises a second assembly surface for connecting the unit working valves, and the second assembly surface is provided with a pilot oil way P port, a pilot oil way T port, a main oil way P port and a main oil way T port; the oil ports with the same name on the first assembly surface and the second assembly surface are communicated through an internal oil way of the valve body I;
the unit working valve comprises a valve body II, four high-speed switching valves, two one-way throttle valves and a three-position three-way proportional valve; each assembling surface of the valve block II is provided with a pilot oil way P port, a pilot oil way T port, a main oil way P port and a main oil way T port, and the oil ports with the same name are communicated through an oil way in the valve block II; a working oil port is arranged on the valve block II;
the port P of the main oil way is connected with an oil inlet P of the three-position three-way proportional valve, and the port T of the main oil way is connected with an oil outlet T of the three-position three-way proportional valve; a working oil port on the valve block II is connected with a working oil port of the three-position three-way proportional valve; a pilot oil way P port is connected with oil inlets of the 4 high-speed switch valves, and a pilot oil way T port is connected with oil outlets of the third high-speed switch valve and the fourth high-speed switch valve; the left control cavity and the right control cavity of the three-position three-way proportional valve are respectively connected with oil outlets of the first high-speed switch valve and the second high-speed switch valve;
the pilot oil way P port is respectively connected with oil inlets of the first high-speed switch valve and the third high-speed switch valve through a first one-way throttle valve A; the pilot oil way P port is respectively connected with oil inlets of a second high-speed switch valve and a fourth high-speed switch valve through a second one-way throttle valve B, oil outlets of the first high-speed switch valve and the second high-speed switch valve are connected with two ports of a proportional valve, and oil outlets of the third high-speed switch valve and the fourth high-speed switch valve are connected with an oil tank.
Each oil port of the second assembly surface of the unit safety valve is connected with the oil port with the same name of one unit working valve assembly surface to realize the connection of the unit safety valve and the unit working valve; the adjacent unit working valves are connected through the oil ports with the same name of the assembly surface; the oil ports of other unit working valves are not connected to the assembly surface of the unit working valve for sealing.
In an embodiment of the present invention, the valve body II is square, and the four assembling surfaces have the same shape; each oil port is arranged on the vertical central line of the assembly surface, and the height and the aperture of the oil ports with the same name on each assembly surface are equal.
In an embodiment of the present invention, the second assembly surface of the unit safety valve is the same as the assembly surface of the valve body II, each oil port on the second assembly surface is opened on the vertical central line of the assembly surface, and the height and the aperture of the oil port with the same name of the second assembly surface and the assembly surface of the valve body II are equal.
In an embodiment of the present invention, two adjacent edges at the top of the valve body II are provided with horizontal protrusions, and the other two edges are provided with grooves matched with the horizontal protrusions; two adjacent edges at the bottom of the valve body II are provided with horizontal lugs, and the other two edges are provided with grooves matched with the horizontal lugs; the horizontal lug and the groove are provided with bolt holes matched with each other.
In one embodiment of the present invention, on the same assembly surface, when the top edge is provided with a horizontal projection, the bottom edge is provided with a groove; when the edge at the top is provided with the groove, the edge at the bottom is provided with the horizontal lug.
In an embodiment of the present invention, the top and the bottom of the second assembly surface of the unit safety valve are provided with horizontal projections or grooves which are matched with the unit working valve; the unit safety valve is connected with the unit working valves through bolts, and the unit working valves are connected through bolts.
In one embodiment of the present invention, the unit working valve further comprises an LVDT displacement sensor and a pressure sensor; the LVDT displacement sensor detects the displacement of the valve core of the three-position three-way proportional valve; and the pressure sensor detects the pressure of each oil port of the three-position three-way proportional valve.
In an embodiment of the present invention, the assembled hydraulic multi-way valve further includes a controller, the controller obtains data of the LVDT displacement sensor and the pressure sensor of each unit working valve, and controls the on-off duty ratio of the high-speed switch valve of each unit working valve through a PWM signal; the controller obtains the pressure of the main oil path and the pilot oil path.
The utility model discloses an embodiment, the controller include displacement closed-loop controller, displacement closed-loop controller can set up the displacement threshold value to the duty cycle control each unit work valve third high speed switch valve and the fourth high speed switch valve of PWM signal is changed according to LVDT displacement sensor and displacement threshold value's difference size.
In one embodiment of the present invention, the unit operation valves are identical; the dynamic performance of the high-speed switch valve in each unit working valve is completely the same.
The utility model discloses a case of the guide's level control proportional valve that high-speed switch valve constitutes, its advantage lies in: when the position of the valve core of the proportional valve is adjusted, the oil pressure disturbance at two ends of the proportional valve can be greatly reduced, and the stability of the proportional valve during working is improved; when the position of the valve core of the proportional valve is maintained, the oil pressure disturbance at two ends of the proportional valve can be completely eliminated, all high-speed switch valves on the oil way are in a normally closed state, the working loss of the high-speed switch valves is reduced, and the service life of the oil way is prolonged.
The utility model discloses the equipment face of each unit work valve all has guide's oil circuit P \ T mouth and main oil circuit P \ T mouth to the guide's oil circuit P \ T mouth and the main oil circuit P \ T mouth of each equipment face are equallyd divide and are do not intercommunicated, consequently only need to assemble every unit valve together according to its structure, and each unit valve will share guide's high-low pressure oil circuit and main high-low pressure oil circuit, realizes increasing and decreasing load mouth and relevant oil circuit wantonly. The useless oil port of the edge unit working valve can be closed by a sealing cover plate. In addition, since the unit working valve provides four assembly surfaces, the arrangement and combination of any shape, such as strip, square, 7-shaped, S-shaped and the like, can be realized, and the flexibility is excellent.
Drawings
Fig. 1 is a schematic structural diagram of an assembled hydraulic multi-way valve according to an embodiment of the present invention;
FIG. 2 is a hydraulic control diagram of the assembled hydraulic multiplex valve of FIG. 1;
FIG. 3 is a schematic structural view of a unit operation valve (a-plane);
FIG. 4 is a schematic structural view (side b) of a unit operation valve;
FIG. 5 is a schematic view of the structure of the unit safety valve (side a);
FIG. 6 is a schematic structural view of a unit safety valve (side b);
fig. 7 is a schematic structural view of the sealing cover plate.
Detailed Description
The invention will be further elucidated and described with reference to a specific embodiment. The utility model discloses in the technical characteristics of each embodiment under the prerequisite that does not conflict each other, all can carry out corresponding combination.
As shown in fig. 1-6, a digital fluid pilot driven programmable control modular hydraulic multiplex valve includes a unit relief valve and a plurality of unit service valves. Fig. 1 and 2 show a particular modular hydraulic multi-way valve in an embodiment of the invention, which comprises a single unit safety valve and 5 unit service valves. The 5 unit working valves have the same structure and are respectively and sequentially marked as a first unit working valve, a second unit working valve, a third unit working valve, a fourth unit working valve and a fifth unit working valve.
Wherein, the first unit working valve is connected with the unit safety valve (the oil ports with the same name are correspondingly connected, and the valve block is connected by a bolt); the two assembly surfaces of the first unit working valve are respectively connected with the second unit working valve and the fourth unit working valve; the two assembly surfaces of the second unit working valve are respectively connected with a third unit working valve and a fifth unit working valve; one assembly surface of the fourth unit working valve is connected with the fifth unit working valve. The other assembling surfaces of the unit working valve are sealed by a sealing cover plate.
In FIG. 1, 1-X-Y are all high-speed on-off valves; wherein X +1 is the serial number of the unit working valve, Y is the letter A/B/C/D, and is divided into a first high-speed switch valve, a second high-speed switch valve, a third high-speed switch valve and a fourth high-speed switch valve. 2-X-A are all load ports of three-position three-way proportional valves in the unit working valves, and X +1 is the serial number of the unit working valve in which the unit working valve is located.
The utility model discloses in, the connection between the unit work valve indicates the two equipment faces's that are connected the same name hydraulic fluid port corresponding connection, and valve block rethread bolted connection fastens.
Wherein, each unit working valve is provided with a working port for connecting a load.
As shown in fig. 5 and 6, in an embodiment of the present invention, the unit safety valve includes a valve body I, a pressure reducing valve 3, and a safety valve 4; the valve body I comprises a first assembly surface used for connecting an external oil path or an oil tank, and the first assembly surface is provided with a pilot oil path P port 5, a pilot oil path T port 6, a main oil path P port 7 and a main oil path T port 8; the oil inlet and the oil outlet of the pressure reducing valve 3 are respectively connected with a main oil path P port 7 and a pilot oil path P port 5; the oil inlet and the oil outlet of the safety valve 4 are respectively connected with a main oil way P port 7 and a main oil way T port 8; the valve body I also comprises a second assembly surface for connecting the unit working valves, and the second assembly surface is provided with a pilot oil way P port, a pilot oil way T port, a main oil way P port and a main oil way T port; the oil ports with the same name on the first assembly surface and the second assembly surface are communicated through an internal oil way of the valve body I.
As shown in fig. 3 and 4, in an embodiment of the present invention, the unit working valve includes a valve body II, four high-speed switching valves, two one-way throttle valves, and a three-position three-way proportional valve; each assembling surface of the valve block II is provided with a pilot oil way P port, a pilot oil way T port, a main oil way P port and a main oil way T port, and the oil ports with the same name are communicated through an oil way in the valve block II; a working oil port is arranged on the valve block II;
the port P of the main oil way is connected with an oil inlet P of the three-position three-way proportional valve, and the port T of the main oil way is connected with an oil outlet T of the three-position three-way proportional valve; a working oil port on the valve block II is connected with a working oil port of the three-position three-way proportional valve; a pilot oil way P port is connected with oil inlets of the 4 high-speed switch valves, and a pilot oil way T port is connected with oil outlets of the third high-speed switch valve and the fourth high-speed switch valve; the left control cavity and the right control cavity of the three-position three-way proportional valve are respectively connected with oil outlets of the first high-speed switch valve and the second high-speed switch valve;
the pilot oil way P port is respectively connected with oil inlets of the first high-speed switch valve and the third high-speed switch valve through a first one-way throttle valve A; the pilot oil way P port is respectively connected with oil inlets of a second high-speed switch valve and a fourth high-speed switch valve through a second one-way throttle valve B, oil outlets of the first high-speed switch valve and the second high-speed switch valve are connected with two ports of a proportional valve, and oil outlets of the third high-speed switch valve and the fourth high-speed switch valve are connected with an oil tank.
In an embodiment of the present invention, the valve body II is square, and the four assembling surfaces have the same shape; each oil port is arranged on the vertical central line of the assembly surface, and the height and the aperture of the oil ports with the same name on each assembly surface are equal.
For convenience of connection, the second assembly surface of the unit safety valve is the same as the assembly surface of the valve body II in shape, all oil ports on the second assembly surface are formed in the vertical center line of the assembly surface, and the height and the hole diameter of the oil ports with the same name on the second assembly surface and the assembly surface of the valve body II are equal. That is, as a preferable aspect of the present invention, the heights of the unit safety valve and the unit operation valve are equal.
The embodiment of the utility model provides an between the unit work valve to and connected mode between unit work valve and the unit relief valve.
Two adjacent edges at the top of the valve body II are provided with horizontal lugs, and the other two edges are provided with grooves matched with the horizontal lugs; two adjacent edges at the bottom of the valve body II are provided with horizontal lugs, and the other two edges are provided with grooves matched with the horizontal lugs; the horizontal lug and the groove are provided with bolt holes matched with each other. On the same assembly surface, when the edge at the top is provided with a horizontal lug, the edge at the bottom is provided with a groove; when the edge at the top is provided with the groove, the edge at the bottom is provided with the horizontal lug.
The top and the bottom of the second assembly surface on the unit safety valve are provided with horizontal lugs or grooves matched with the unit working valve; the unit safety valve is connected with the unit working valves through bolts, and the unit working valves are connected through bolts.
The assembly surface (4 assembly surfaces) of each unit working valve is provided with a pilot oil way P \ T port and a main oil way P \ T port, and the pilot oil way P \ T port and the main oil way P \ T port of each assembly surface are communicated with each other respectively, so that each unit valve is only required to be assembled together according to the structure, and each unit valve shares the pilot high-low pressure oil way and the main high-low pressure oil way, thereby realizing the random increase and decrease of the load port and the related oil way thereof. The edge cell valve is closed with a sealing cover plate 10, without the use of oil ports. In addition, since the unit working valve provides four assembly surfaces, the arrangement and combination of any shape, such as strip, square, 7-shaped, S-shaped and the like, can be realized, and the flexibility is excellent.
In one embodiment of the present invention, the unit working valve further comprises an LVDT displacement sensor and a pressure sensor; the LVDT displacement sensor detects the displacement of the valve core of the three-position three-way proportional valve; and the pressure sensor detects the pressure of each oil port of the three-position three-way proportional valve.
In an embodiment of the present invention, the assembled hydraulic multi-way valve further includes a controller, the controller obtains data of the LVDT displacement sensor and the pressure sensor 9 of each unit working valve, and controls the on-off duty ratio of the high-speed switch valve of each unit working valve through a PWM signal; the controller obtains the pressure of the main oil path and the pilot oil path.
The utility model discloses an embodiment, the controller include displacement closed-loop controller, displacement closed-loop controller can set up the displacement threshold value to the duty cycle control each unit work valve third high speed switch valve and the fourth high speed switch valve of PWM signal is changed according to LVDT displacement sensor and displacement threshold value's difference size.
In one embodiment of the present invention, the unit operation valves are identical; the dynamic performance of the high-speed switch valve in each unit working valve is completely the same.
And carrying out flow output experiments on the valve under different valve port pressure differences and different valve port opening degrees, recording the data and storing the data in the controller. When the flow control is needed, the controller inquires the flow data stored in the controller according to the target flow, performs table look-up operation to obtain the valve port opening required by the target flow under the current valve port pressure difference, and moves the actuator to the displacement result output by table look-up through displacement sensor stroke displacement closed-loop control. And repeating the table look-up process and the displacement closed-loop control process until the output flow of the hydraulic valve is consistent with the target flow.
As shown in fig. 7, for the utility model discloses a sealed apron sketch map, apron upper end and lower extreme all are equipped with the arch (are equipped with the bolt hole in the arch) for cooperate sunken and protruding on the unit work valve, sealed apron passes through the bolt fastening on the unit work valve.
As shown in fig. 1 and 2, the pressure reducing valve 3 reduces the pressure of the high-pressure oil to supply the low-pressure oil to the high-speed switching valve of the pilot stage. The safety valve 4 plays a safety role, and ensures that oil is unloaded when the load is suddenly increased. When the multi-path unit working valve is connected with a load sensitive pump, a flow instruction is sent to each working valve according to the relation between the pressure and the flow of a load sensitive port of the load sensitive pump, the total required flow is calculated after the flow instructions of each working valve are summed, the pressure of the load sensitive port at the flow is obtained through back calculation according to the relation between the pressure and the flow of the load sensitive port, and the duty ratio of high-speed switching valves 1-0-A, 1-0-B, 1-0-C and 1-0-D of a pilot valve block of a control valve is changed under the drive of a PWM signal to control the opening degree of the load sensitive valve 2-0, so that the pressure of the load sensitive port is controlled; the pressure sensor of the load sensitive port monitors the pressure of the load sensitive port in real time and feeds the pressure back to the controller to form closed-loop control, so that the control precision is improved.
The working principle of controlling one hydraulic cylinder (load) by using a 2-1-A \2-2-A load port is taken as an example for explanation:
the working ports (2-1-A and 2-2-A) of the unit working valves 2-1\2-2 are respectively connected with an oil inlet and an oil outlet of a load, the high-speed switch valves are all in a closed state, when the high-speed switch valves are opened, the controllers give gradually increased and consistent duty ratio to the high-speed switch valves 1-1-A, 1-1-B, 1-2-A and 1-2-B through PWM signals, the duty ratio is kept unchanged after the high-speed switch valves are completely opened, because the high-speed switch valves have the same opening and closing characteristics and quick dynamic response, the oil pressure acting on the left control cavity and the right control cavity of the hydraulic valves 2-1 and 2-2 is equal, and the hydraulic valves 2-1 and 2-2 are all in a middle.
When the working port of the hydraulic valve 2-1 is connected with a load oil inlet and the working port of the hydraulic valve 2-2 is connected with a load oil outlet, the high-speed switch valves 1-1-A, 1-1-B, 1-2-A and 1-2-B are still kept completely open, the controller outputs PWM signals to control the high-speed switch valves 1-1-D to work at the duty ratio tau, the high-speed switch valves 1-1-C are still in a closed state, the hydraulic pressure of the left control cavity of the actuator of the hydraulic valve 2-1 is greater than the hydraulic pressure of the right control cavity, the actuator moves to the right at the moment, and the oil inlet of the hydraulic valve 2-1 is connected with the. The controller receives the signal of the valve core displacement sensor, compares the signal with a target displacement signal, performs closed-loop operation, updates the duty ratio tau of the high-speed switch valve 2-1-D, changes the PWM signal driving duty ratio of the high-speed switch valve 1-1-D, and can control the pressure difference of the left control cavity and the right control cavity of the actuator so as to adjust the opening degree of the valve port. The displacement, pressure and flow parameters of the actuator are fed back to the controller through the LVDT displacement sensor and the pressure sensor which are installed on the hydraulic valve 2-1, the controller controls the high-speed switch valve 1-1-D through closed-loop operation, the required pressure flow output by a working port of the hydraulic valve 2-1 is ensured, and the control precision is improved. The working principle of the hydraulic valve 2-2 is the same, the working duty ratio of the high-speed switch valve 1-2-C is adjusted, and the high-speed switch valve 1-2-D is in a closed state, so that the actuator of the hydraulic valve 2-2 can move leftwards and adjust the opening degree of the valve port.
Similarly, if the working port of the hydraulic valve 2-1 is connected with the load oil outlet and the working port of the hydraulic valve 2-2 is connected with the load oil inlet, the duty ratio is driven by changing the PWM signals of the high-speed switching valves 1-1-C and 1-2-D as long as the high-speed switching valves 1-1-D and 1-2-C are closed.
When the actuator of the hydraulic valve 2-1 reaches the target position, the high-speed switch valves 1-1-A, 1-1-B, 1-1-C and 1-1-D are closed at the same time, the oil pressures of the left control cavity and the right control cavity are equal, and the actuator does not move any more. The closing principle of the hydraulic valve 2-1 is the same.
The working ports of the two three-position three-way hydraulic valves are independent and do not influence each other, when the load needing back pressure or the pressure flow and other parameters of the load need to be compositely controlled, the double-valve-core scheme can well achieve the required functions, and the waste of energy is reduced. The two hydraulic valves are respectively provided with an LVDT displacement sensor and a pressure sensor, the pressure and the flow of a load oil inlet and an oil outlet can be monitored in real time, parameter signals are fed back to the controller, a closed-loop control parameter adjusting function is arranged in the controller, the dynamic performance in the processes of displacement closed-loop control, pressure closed-loop control and flow closed-loop control can be changed by adjusting parameters, and the programmable control of the double valve cores is realized.
Particularly, the eight high-speed switching valves of the pilot stage have the same dynamic performance, and work under the same frequency and different or same duty ratio is realized through PWM control.
Meanwhile, the controller detects the pressure condition of the working port, and can move the main valve core to realize pressure control of the corresponding oil port according to the pressure requirement of a user on each port.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. A digital fluid pilot-operated programmable control assembled hydraulic multi-way valve is characterized by comprising a unit safety valve and a plurality of unit working valves;
the unit safety valve comprises a valve body I, a pressure reducing valve (3) and a safety valve (4); the valve body I comprises a first assembly surface used for connecting an external oil path or an oil tank, and the first assembly surface is provided with a pilot oil path P port (5), a pilot oil path T port (6), a main oil path P port (7) and a main oil path T port (8); the oil inlet and the oil outlet of the pressure reducing valve (3) are respectively connected with a main oil path P port (7) and a pilot oil path P port (5); the oil inlet and the oil outlet of the safety valve (4) are respectively connected with a main oil way P port (7) and a main oil way T port (8); the valve body I also comprises a second assembly surface for connecting the unit working valves, and the second assembly surface is provided with a pilot oil way P port, a pilot oil way T port, a main oil way P port and a main oil way T port; the oil ports with the same name on the first assembly surface and the second assembly surface are communicated through an internal oil way of the valve body I;
the unit working valve comprises a valve body II, four high-speed switching valves, two one-way throttle valves and a three-position three-way proportional valve; each assembling surface of the valve block II is provided with a pilot oil way P port, a pilot oil way T port, a main oil way P port and a main oil way T port, and the oil ports with the same name are communicated through an oil way in the valve block II; a working oil port is arranged on the valve block II;
the port P of the main oil way is connected with an oil inlet P of the three-position three-way proportional valve, and the port T of the main oil way is connected with an oil outlet T of the three-position three-way proportional valve; a working oil port on the valve block II is connected with a working oil port of the three-position three-way proportional valve; a pilot oil way P port is connected with oil inlets of the 4 high-speed switch valves, and a pilot oil way T port is connected with oil outlets of the third high-speed switch valve and the fourth high-speed switch valve; the left control cavity and the right control cavity of the three-position three-way proportional valve are respectively connected with oil outlets of the first high-speed switch valve and the second high-speed switch valve;
the pilot oil way P port is respectively connected with oil inlets of the first high-speed switch valve and the third high-speed switch valve through a first one-way throttle valve A; a pilot oil way P port is respectively connected with oil inlets of a second high-speed switch valve and a fourth high-speed switch valve through a second one-way throttle valve B, oil outlets of the first high-speed switch valve and the second high-speed switch valve are connected with two ports of a proportional valve, and oil outlets of the third high-speed switch valve and the fourth high-speed switch valve are connected with an oil tank;
each oil port of the second assembly surface of the unit safety valve is connected with the oil port with the same name of one unit working valve assembly surface to realize the connection of the unit safety valve and the unit working valve; the adjacent unit working valves are connected through the oil ports with the same name of the assembly surface; the oil ports of other unit working valves are not connected to the assembly surface of the unit working valve for sealing.
2. The digital fluid pilot-driven programmable control assembled hydraulic multiway valve according to claim 1, wherein the valve body II is square, and the four assembly surfaces have the same shape; each oil port is arranged on the vertical central line of the assembly surface, and the height and the aperture of the oil ports with the same name on each assembly surface are equal.
3. The digital fluid pilot-driven programmable control assembled hydraulic multiport valve as recited in claim 1 or 2, characterized in that the second assembling surface of the unit safety valve is the same as the assembling surface of the valve body II, each oil port on the second assembling surface is opened on the vertical center line of the assembling surface, and the height and the aperture of the oil port with the same name on the second assembling surface are equal to those on the assembling surface of the valve body II.
4. The digital fluid pilot-driven programmable control assembled hydraulic multi-way valve according to claim 1 or 2, characterized in that two adjacent edges at the top of the valve body II are provided with horizontal projections, and the other two edges are provided with grooves matched with the horizontal projections; two adjacent edges at the bottom of the valve body II are provided with horizontal lugs, and the other two edges are provided with grooves matched with the horizontal lugs; the horizontal lug and the groove are provided with bolt holes matched with each other.
5. The digital fluid pilot driven programmable controlled assembled hydraulic multiport valve as in claim 4 wherein on the same assembly face, when horizontal bumps are provided on the top land, grooves are provided on the bottom land; when the edge at the top is provided with the groove, the edge at the bottom is provided with the horizontal lug.
6. The digital fluid pilot actuated programmable controlled assembled hydraulic multiport valve as in claim 5 wherein the top and bottom of the second assembly surface on said unit relief valve is provided with horizontal projections or recesses for mating with the unit service valve; the unit safety valve is connected with the unit working valves through bolts, and the unit working valves are connected through bolts.
7. The digital fluid pilot actuated programmable controlled packaged hydraulic multiplex valve as defined in claim 1 wherein said unit service valves further include LVDT displacement sensors, pressure sensors; the LVDT displacement sensor detects the displacement of the valve core of the three-position three-way proportional valve; and the pressure sensor detects the pressure of each oil port of the three-position three-way proportional valve.
8. The digital fluid pilot-driven programmable control assembled hydraulic multi-way valve according to claim 7, characterized in that the assembled hydraulic multi-way valve further comprises a controller, the controller acquires data of LVDT displacement sensors and pressure sensors of each unit working valve and controls the on-off duty ratio of the high-speed switch valve of each unit working valve through PWM signals; the controller obtains the pressure of the main oil path and the pilot oil path.
9. The digital fluid pilot-driven programmable control assembled hydraulic multi-way valve according to claim 8, wherein the controller comprises a displacement closed-loop controller, the displacement closed-loop controller can set a displacement threshold value and change the duty ratio of the PWM signal according to the difference value of the LVDT displacement sensor and the displacement threshold value to control the third high-speed switch valve and the fourth high-speed switch valve of each unit working valve.
10. The digital fluid pilot actuated programmable controlled packaged hydraulic multiport valve as in claim 1 wherein each unit service valve is identical; the dynamic performance of the high-speed switch valve in each unit working valve is completely the same.
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| CN202021402502.4U CN212479745U (en) | 2020-07-16 | 2020-07-16 | Digital fluid pilot driven programmable control assembled hydraulic multi-way valve |
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| CN202021402502.4U CN212479745U (en) | 2020-07-16 | 2020-07-16 | Digital fluid pilot driven programmable control assembled hydraulic multi-way valve |
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