CN105984364B - Redundant control electric control gas circuit hydraulic valve and system for dumper - Google Patents
Redundant control electric control gas circuit hydraulic valve and system for dumper Download PDFInfo
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- CN105984364B CN105984364B CN201510052340.3A CN201510052340A CN105984364B CN 105984364 B CN105984364 B CN 105984364B CN 201510052340 A CN201510052340 A CN 201510052340A CN 105984364 B CN105984364 B CN 105984364B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The hydraulic valve comprises a pneumatic control hydraulic valve, at least two electric control pneumatic valves, a control gas circuit and a hydraulic oil circuit, wherein the hydraulic oil circuit comprises a pressure oil circuit, an oil return circuit and a driving oil circuit, and the pressure oil circuit and the oil return circuit are both communicated between the pneumatic control hydraulic valve and a hydraulic oil power source; the driving oil way is communicated between the pneumatic control hydraulic valve and a controlled hydraulic device; the control air circuit comprises an air supply circuit and at least two operation air circuits, and the air supply circuits respectively supply air for the electric control air pressure valve; each operation gas circuit is respectively connected with the electric control pneumatic valve and the pneumatic control hydraulic valve; and controlling the air supply to be respectively connected with each operation air passage through each electric control air pressure valve so as to control the air control hydraulic valve to switch the state of the driving oil passage to be disconnected, or the driving oil passage is communicated with the pressure oil passage, or the driving oil passage is communicated with the oil return passage. It is convenient to hydraulically control the series control related to electricity.
Description
Technical Field
The invention relates to a hydraulic control technology, in particular to a redundant control electric control gas circuit hydraulic valve and a system for a dumper.
Background
The dumper is one of engineering vehicles, and can always see the body and shadow of the dumper on engineering operation sites, and the dumper has the main functions of loading and transporting goods and efficiently unloading the goods by means of transmission technology, mechanical technology and the like. At present, the basic operation principle is shown in fig. 1, and the pneumatic control hydraulic lifting valve comprises a pneumatic control hydraulic lifting valve 9, a manual air path proportional valve 8, a single-acting hydraulic cylinder 7 and a hydraulic power source 6, wherein the hydraulic power source 6 and the single-acting hydraulic cylinder 7 are communicated through a hydraulic oil path, the pneumatic control hydraulic lifting valve 9 is connected in series with the hydraulic oil path, and the pneumatic control hydraulic lifting valve 9 is controlled by the manual air path proportional valve 8. The unloading of dumper goods mainly realizes several gears through manual gas circuit proportional valve 8, and then the output gas circuit is controlled pneumatic control hydraulic lift valve, and the lift of the single-acting pneumatic cylinder of hydraulic oil drive that comes from the hydraulic pump is finally controlled, simultaneously, in order to carry out the spacing of lifting height, the limit valve of pneumatic control is gone into in the gas circuit that lifts in cluster and is controlled the extremely spacing of pneumatic cylinder.
At present, a manual control proportional valve of a dump truck is arranged in a cab, a pneumatic control hydraulic valve is arranged at a hydraulic oil tank of a truck body, an air pressure pipeline is arranged from the hydraulic oil tank to the cab in a troublesome manner, and if new electric control components are added on the basis, the trouble of arranging new pipelines and circuits is increased.
Disclosure of Invention
The invention aims to solve the technical problems: the lifting control of the existing dump truck cannot be connected with electricity, so that a series of control related to the electricity cannot be expanded, and the problems of a remote control mode, a key electric control mode and the like are solved.
The invention aims to solve the technical problems: the original control system has the problems that a pneumatic control hydraulic lifting valve is required to be arranged from a cab to the side of a hydraulic oil tank, the operation is complicated, the integration level is low and the like;
the invention aims to solve the technical problems: the problems of insufficient redundant control, weak protection performance, easy dangerous consequences and the like caused by single electric control are solved;
the invention aims to solve the technical problems: the electronic control scheme is updated on the original system, and the technical problems of more complex system after the updating, inconvenient operation, complicated wiring, poor compatibility with the original system and the like are faced.
The embodiment of the invention provides a redundant control electric control gas circuit hydraulic valve for a dumper, which comprises a pneumatic control hydraulic valve, at least two electric control pneumatic valves, a control gas circuit and a hydraulic oil circuit, wherein the hydraulic oil circuit comprises a pressure oil circuit, an oil return circuit and a driving oil circuit, and the pressure oil circuit and the oil return circuit are both communicated between the pneumatic control hydraulic valve and a hydraulic oil power source; the driving oil way is communicated between the pneumatic control hydraulic valve and a controlled hydraulic device; the control air circuit comprises an air supply circuit and at least two operation air circuits, and the air supply circuits respectively supply air for the electric control air pressure valve; each operation gas circuit is respectively connected with the electric control pneumatic valve and the pneumatic control hydraulic valve; and controlling the air supply to be respectively connected with each operation air passage through each electric control air pressure valve so as to control the air control hydraulic valve to switch the state of the driving oil passage to be disconnected, or the driving oil passage is communicated with the pressure oil passage, or the driving oil passage is communicated with the oil return passage.
The embodiment provides the electric control gas circuit hydraulic valve for the dumper, which has the beneficial effects that an electric control method is added, so that the control of a lifting hydraulic system is expanded to the electric control field, and the future control is more flexible; the electric control gas circuit hydraulic valve is higher in integration degree from the combination of mechanical body design, principle design and original system through the form of the combination valve, so that the control of the system is more various, the system is safer, and the electric control gas circuit hydraulic valve with high compatibility enables the installation of the system to be more convenient and quick.
According to one embodiment, the pneumatic control hydraulic valve comprises at least a first air port, a second air port and a third air port; when the first air receiving port is ventilated, the driving oil way is communicated with the pressure oil way; when the second air receiving port is ventilated, the driving oil way is communicated with the oil return way part; when the third air receiving port is ventilated, the driving oil way is fully communicated with the oil return way; the number of the electric control air pressure valves is at least three, and the electric control air pressure valves are at least a first electric control air pressure valve, a second electric control air pressure valve and a third electric control air pressure valve respectively; the first electric control air pressure valve is connected with one air supply path and one exhaust path, and is communicated with the first air port through a first operation air path; the second electric control air pressure valve is connected with one air supply path and one exhaust path, and is communicated with the second air receiving port through a second operation air path; the third electric control air pressure valve is connected with one air supply path and one exhaust path, and is communicated with the third air port through a third operation air path.
According to an embodiment, the third operation air path is connected in series with a first shuttle valve, and one side of the third operation air path, which is close to the third electric control air pressure valve, is connected with an air inlet of the first shuttle valve; one side of the third operation air path, which is close to the pneumatic control hydraulic valve, is connected with an air outlet of the first shuttle valve; the second operating air passage is connected with the other air inlet of the first shuttle valve.
According to one embodiment, the device is further provided with a manual proportional pneumatic control reversing valve which is connected with a gas supply path and a gas exhaust path and is connected with a gas supply operation path and a gas return operation path; the first operation air path is connected with a second shuttle valve in series, and one side, close to the first electric control air pressure valve, of the first operation air path is connected with an air inlet of the second shuttle valve; one side of the first operation air path, which is close to the pneumatic control hydraulic valve, is connected with an air outlet of the second shuttle valve; the oil supply operation gas circuit is connected with the other gas inlet of the second shuttle valve; a third shuttle valve is connected in series on the third operation air path, and one side, close to the first shuttle valve, of the third operation air path is connected into an air inlet of the third shuttle valve; one side of the third operation air path, which is close to the pneumatic control hydraulic valve, is connected with an air outlet of the third shuttle valve; the oil return operation gas circuit is connected with the other gas inlet of the third shuttle valve; and controlling the first or third operation gas paths to be respectively communicated with gas supply through the manual proportional pneumatic control reversing valve so as to control the pneumatic control hydraulic valve to switch the driving oil path to be communicated with the pressure oil path or to be communicated with the oil return path.
According to an embodiment, the first operation air path or the oil supply operation air path is connected in series with a limit valve, the limit valve is a normally-open two-position two-way valve, and when the controlled hydraulic device reaches the limit position, the limit valve is triggered to cut off the first operation air path or the oil supply operation air path.
According to an embodiment, the hydraulic control device further comprises an electromagnetic limit valve, the electromagnetic limit valve is coupled with the first electric control pneumatic valve, and when the controlled hydraulic device reaches the limit position, the electromagnetic limit valve is triggered to cut off the first operation gas circuit.
According to one embodiment, the electric control pneumatic valve is a normally-off two-position three-way reversing valve, and a composite control mode of electromagnetic control and manual control is adopted.
According to one embodiment, the driving oil path is communicated with the oil return path through a branch oil path, and an overflow valve is connected to the branch oil path in series.
According to an embodiment, there is further provided a redundant control electric control gas circuit hydraulic combination valve for a dumper, including a hydraulic valve body and a gas circuit valve body, where the hydraulic valve body includes a pneumatic control hydraulic valve, a gas circuit interface, a pressure oil circuit interface, an oil return circuit interface and a driving oil circuit interface; the gas circuit valve body comprises at least two electric control gas pressure valves, at least two operation gas circuits and a gas supply interface, and the electric control gas pressure valves are respectively supplied with gas through the gas supply interface; each operation gas circuit is respectively connected with gas circuit interfaces of the electric control gas pressure valve and the pneumatic control hydraulic valve; and controlling the operation gas paths to be respectively communicated with gas supply through the electric control gas pressure valves so as to control the pneumatic control hydraulic valves to switch the state of the driving oil path interface to be disconnected, or the driving oil path interface is communicated with the pressure oil path interface, or the driving oil path interface is communicated with the oil return path interface.
According to one embodiment, the hydraulic valve body and the air passage valve body are fixedly connected into a whole.
According to an embodiment, a redundant control electric control gas circuit hydraulic system for a dumper is further provided, and the redundant control electric control gas circuit hydraulic system comprises a lifting hydraulic cylinder, a hydraulic oil power source and the electric control gas circuit hydraulic valve, wherein the hydraulic oil power source is connected with the lifting hydraulic cylinder through the electric control gas circuit hydraulic valve, and the electric control gas circuit hydraulic valve controls the lifting hydraulic cylinder to lift, drop or stop.
The invention has the following beneficial effects:
in the embodiment of the invention, a special combination mode is adopted, an electric control air valve is used for controlling the reversing of an air path, and the direction of a hydraulic loop of an oil cylinder is controlled by controlling a hydraulic valve, so that the ascending and descending of the dump truck are realized. The combined valve comprises three electric control air valves which respectively control the ascending, descending and slow descending of the oil cylinder. The control gas circuit in the combination valve is connected with an external pneumatic control limit valve in series to ensure the operation safety protection of the dumper.
Drawings
FIG. 1 is a schematic diagram of the construction principle of a manual pneumatic hydraulic system in the prior art;
FIG. 2 is a schematic diagram of the internal principle of an example electronically controlled pneumatic hydraulic valve in a first embodiment of the present invention;
fig. 3 is a schematic diagram of the outline structure of the electric control gas circuit hydraulic group valve according to the first embodiment of the present invention;
FIG. 4 is a schematic bottom view of the first embodiment of the electric control circuit hydraulic pressure group valve of the present invention;
FIG. 5 is a schematic diagram of the internal principle of an example electronically controlled pneumatic hydraulic valve in a second embodiment of the present invention;
fig. 6 is a schematic diagram of the internal principle of an electrically controlled pneumatic hydraulic valve as an example in a third embodiment of the present invention.
Detailed Description
Exemplary embodiments that embody features and advantages of the present invention are described in detail in the following description. It will be understood that the invention is capable of various modifications in various embodiments, all without departing from the scope of the invention, and that the description and illustrations herein are intended to be by way of illustration only and not to be construed as limiting the invention.
The embodiment of the invention provides a redundant control electric control gas circuit hydraulic system for a dumper, which can comprise a lifting hydraulic cylinder, a hydraulic oil power source, a pneumatic control gas source, a gas supply pipe, a hydraulic oil circuit and an electric control gas circuit hydraulic valve, wherein the hydraulic oil power source is connected with the lifting hydraulic cylinder through the electric control gas circuit hydraulic valve, and the electric control gas circuit hydraulic valve can control the lifting hydraulic cylinder to lift, drop or stop.
The embodiment of the invention provides an electric control gas circuit hydraulic combination valve, and fig. 3 and 4 show structural diagrams of an embodiment, and the combination valve comprises a hydraulic valve body 1 and a gas circuit valve body 2. The hydraulic valve body 1 may include a pneumatically controlled hydraulic valve (not shown in fig. 3), a pressure oil passage port 11, an oil return passage port 11A, a drive oil passage port 12, a backup oil return port 13, and a pressure measurement port 14.
The air passage valve body 2 may be provided with a plurality of electrically controlled air pressure valves 21, 22, 23, a plurality of internal operation air passages (internal, not shown), an air supply port 24, a limit valve air supply port 26 and a limit valve air return port 25. The electronically controlled pneumatic valves 21, 22, 23 are mounted directly outside the valve body for ease of installation or replacement. The external pneumatic control air source can supply air to the electric control air pressure valves 21, 22 and 23 through the air supply interface 24. Each operation air passage is internally connected with air passage interfaces of each electric control air pressure valve 21, 22, 23 and the air control hydraulic valve respectively.
The air supply can be controlled by each electric control air pressure valve 21, 22 and 23 to switch the state of the driving oil way interface of the air control hydraulic valve to be disconnected, or the driving oil way interface is communicated with the pressure oil way interface, or the driving oil way interface is communicated with the oil return way interface.
In addition, in the embodiment of the invention, the hydraulic valve body 1 and the air path valve body 2 are fixedly connected into a whole, and the hydraulic valve body and the air path valve body form a combined valve, and all main parts are of a modular design, so that the hydraulic valve can be conveniently replaced and installed. And the pipeline arrangement is simpler, the signal wire can be used for being connected into the cab, and the pipeline arrangement is more convenient to lay.
The internal structure principle of the electric control air path hydraulic valve in the first embodiment of the present invention is that (as can be understood by referring to fig. 2), the electric control air path hydraulic valve comprises an air control hydraulic valve 10, a plurality of electric control air pressure valves 21, 22, 23, a control air path and a hydraulic oil path. The hydraulic oil path includes a pressure oil path 31, an oil return path 32, and a driving oil path 33, the pressure oil path 31 and the oil return path 32 are both communicated between the pneumatic control hydraulic valve 10 and a hydraulic oil power source, the hydraulic oil power source may include an oil pump and an oil tank, the pressure oil path 31 is communicated with the oil pump, and the oil return path 32 is communicated to the oil tank. The driving oil path 33 communicates between the pneumatic control hydraulic valve 10 and a controlled hydraulic device (which may be a lifting hydraulic cylinder). The control air circuit comprises an air supply circuit 17 and a plurality of operation air circuits 18, 19 and 20, and one air supply circuit supplies air for electric control air pressure valves 21, 22 and 23 respectively; each operation gas path 18, 19, 20 is respectively connected with an electric control gas pressure valve 21, 22, 23 and a pneumatic control hydraulic valve 10; the respective air supply of each operation air passage is controlled by each electric control air pressure valve 21, 22, 23 to control the air control hydraulic valve 10 to switch the state of the driving oil passage 33 to be off (in the case that all operation air passages are disconnected and no air supply is performed), or the driving oil passage 33 is communicated with the pressure oil passage 31, or the driving oil passage 33 is communicated with the oil return passage 32. To control the lifting hydraulic cylinder to stop, lift or descend.
First embodiment
As shown in fig. 2, which is a schematic diagram of an exemplary internal structure according to the first embodiment, the electric control pneumatic hydraulic valve includes a pneumatic control hydraulic valve 10, three electric control pneumatic valves 21, 22, 23, a control pneumatic circuit and a hydraulic oil circuit. The hydraulic oil circuit includes a pressure oil circuit 31, an oil return circuit 32 and a driving oil circuit 33, the pressure oil circuit 31 and the oil return circuit 32 are both communicated between the pneumatic control hydraulic valve 10 and a hydraulic oil power source, the hydraulic oil power source can include an oil pump and an oil tank, the pressure oil circuit 31 is communicated with the oil pump, a one-way valve can be connected between the pressure oil circuit 31 and the oil pump in series, and the oil return circuit 32 is communicated with the oil tank. The driving oil path 33 is connected between the pneumatic control hydraulic valve 10 and the controlled hydraulic device, the driving oil path 33 can also be connected to the oil return path 32 through a branch oil path 34, and an overflow valve 35 can be connected in series on the branch oil path 34.
The pneumatic-controlled hydraulic valve 10 includes at least a first air port 15, a second air port 16A, and a third air port 16. When the first air port 15 is ventilated, the pneumatic control hydraulic valve 10 rotates to the right, the driving oil path 33 is communicated with the pressure oil path 31, and hydraulic oil is supplied to a controlled hydraulic device (which can be a lifting hydraulic cylinder) to do work through the driving oil path 33. When the second air port 16A is ventilated, only a part of the driving oil path 33 is communicated with the oil return path 32, but not the whole, so as to realize slow oil return. When the third air port 16 is ventilated, the driving oil way 33 is fully communicated with the oil return way 32, the pneumatic control hydraulic valve 10 is turned to the left position, hydraulic oil in the controlled hydraulic device is quickly reserved to the oil tank, and the controlled hydraulic device (which can be a lifting hydraulic cylinder) is quickly returned.
The pneumatic control hydraulic valve 10 can be a three-position six-way proportional reversing valve, the left side of the three-position six-way reversing valve is pneumatic pilot pressurization control, and the right side of the three-position six-way proportional reversing valve is pneumatic secondary pilot pressurization control.
The number of the electric control air pressure valves is at least three, the electric control air pressure valves are normally-off two-position three-way reversing valves, and a composite control mode of electromagnetic control and manual control is adopted. At least a first electrically controlled pneumatic valve 21, a second electrically controlled pneumatic valve 22 and a third electrically controlled pneumatic valve 23, respectively. The first electrically controlled air pressure valve 21 is connected to an air supply path 17 and to an air exhaust path (not shown), and the first electrically controlled air pressure valve 21 communicates with the first air receiving port 15 through the first operation air path 18. The second electrically controlled air pressure valve 22 is also connected with the air supply channel 17 and is connected with an exhaust channel, and the second electrically controlled air pressure valve 22 is communicated with the second air receiving port 16A through the second operation air channel 19. The third electrically controlled air pressure valve 23 is also connected with the air supply channel and is connected with an exhaust channel, and the third electrically controlled air pressure valve 23 is communicated with the third air receiving port 16 through the third operation air channel 20.
The third operation air path 20 may be connected in series with a first shuttle valve 29 (the higher pressure end of the air inlet is automatically connected with the air outlet, the lower air inlet end is closed), and one side of the third operation air path 20 close to the third electric control air pressure valve 23 is connected to an air inlet of the first shuttle valve 29; one side of the third operation air path 20, which is close to the pneumatic control hydraulic valve 10, is connected with an air outlet of the first shuttle valve 29; the second operating air path 19 is connected to the other air inlet of the first shuttle valve 29.
A limiting valve 51 is connected in series to the first operation air path 18, the limiting valve 51 is located between the first electric control air pressure valve 21 and the pneumatic control hydraulic valve 10, the limiting valve 51 is a normally-open two-position two-way valve, and when the controlled hydraulic device 5 reaches a limit position, the limiting valve 51 is triggered to cut off the first operation air path 18.
The first electrically controlled air pressure valve 21, the second electrically controlled air pressure valve 22 and the third electrically controlled air pressure valve 23 may share one air source. The first, second and third electrically controlled pneumatic valves 21, 22 and 23 can control the movement, slow return or fast return of the controlled hydraulic device.
For example, the electromagnetic switch coils corresponding to the first electrically controlled air pressure valve 21, the second electrically controlled air pressure valve 22 and the third electrically controlled air pressure valve 23 can supply power with the power of 4.0W at 21.6V-26.4V.
The embodiment provides the electric control gas circuit hydraulic valve for the dumper, which has the beneficial effects that an electric control method is added, so that the control of a lifting hydraulic system is expanded to the electric control field, and the future control is more flexible; the electric control gas circuit hydraulic valve is higher in integration degree from the combination of mechanical body design, principle design and original system through the form of the combination valve, so that the control of the system is more various, the system is safer, and the electric control gas circuit hydraulic valve with high compatibility enables the installation of the system to be more convenient and quick.
Second embodiment
As shown in fig. 5, which is an exemplary internal structure diagram according to the second embodiment, as shown in the drawing, it is different from the first embodiment in that,
the manual proportional pneumatic reversing valve 4 is connected with a gas supply path and a gas discharge path, and is connected with a gas supply operation path 41 and a gas return operation path 42. A second shuttle valve 28 is connected in series with the first operation air path 18, and one side of the first operation air path 18 close to the first electric control air pressure valve 21 is connected to an air inlet of the second shuttle valve 28. One side of the first operating air path 18, which is close to the pneumatic control hydraulic valve 10, is connected to an air outlet of the second shuttle valve 28. And the oil supply operation gas path 41 is connected to the other gas inlet of the second shuttle valve 28. The third operation air path 20 is connected in series with a third shuttle valve 27, and one side of the third operation air path 20, which is close to the first shuttle valve 29, is connected with an air inlet of the third shuttle valve 27; one side of the third operation air path 20, which is close to the pneumatic control hydraulic valve 10, is connected with an air outlet of a third shuttle valve 27; the oil return operation air path 42 is connected to the other air inlet of the third shuttle valve 27. In this way, the manual proportional pneumatic control reversing valve 4 can also control the first or third operating air paths 18 and 20 to be respectively connected with air supply so as to control the pneumatic control hydraulic valve to switch the driving oil path to be communicated with the pressure oil path or to be communicated with the oil return path.
The oil supply operation air path 41 can be further connected in series with a limit valve 51, the limit valve 51 is a normally-open two-position two-way valve, and when the controlled hydraulic device 5 reaches the limit position, the limit valve 51 can be triggered to cut off the oil supply operation air path 41. Meanwhile, there may be an electromagnetic limit valve (not shown) coupled to the first electrically controlled pneumatic valve 21, and when the controlled hydraulic device 5 reaches the limit position, the electromagnetic limit valve is triggered to cut off the first operation air path 18.
The embodiment provides the electric control gas circuit hydraulic valve for the dumper, which has the beneficial effects that an electric control method is added, and meanwhile, a manual pneumatic control valve member is reserved, so that the control of a lifting hydraulic system is expanded to the electric control field, and the future control is more flexible; the electric control gas circuit hydraulic valve is higher in integration degree from the combination of mechanical body design, principle design and original system through the form of the combination valve, so that the control of the system is more various, the system is safer, and the electric control gas circuit hydraulic valve with high compatibility enables the installation of the system to be more convenient and quick.
Third embodiment
As shown in fig. 6, which is a schematic diagram of an exemplary internal structure according to the third embodiment, as shown in the drawing, the difference from the second embodiment is that a limiting valve 51 is connected in series to the first operation air path 18, the limiting valve 51 is located between the second shuttle valve 28 and the pneumatic control hydraulic valve 10, the limiting valve 51 is a normally open two-position two-way valve, and when the controlled hydraulic device 5 reaches the limit position, the limiting valve 51 is triggered to cut off the first operation air path 18. Thus, the oil supply operation gas passage 41 and the first operation gas passage 18 may share one limit valve 51.
In the above embodiments, the exhaust port of each gas path valve member may be provided with a muffler to reduce noise.
The operation method comprises the following steps: (the lifting power of the lifting oil cylinder comes from the accelerator of the pedal vehicle, and the lifting oil cylinder descends by self gravity)
1. And (3) electric control operation: the electric control gas circuit hydraulic valve drives the pneumatic valve by the electromagnetic valve according to the received control signal, and then drives the hydraulic valve core by the pneumatic valve to control the ascending, descending and slow descending of the hydraulic oil cylinder. The lifting cylinder is lifted when the first electric control air pressure valve 21 is powered corresponding to the solenoid valve coil, the lifting cylinder is slowly lowered when the second electric control air pressure valve 22 is powered corresponding to the solenoid valve coil, the lifting cylinder is lowered when the third electric control air pressure valve 23 is powered corresponding to the solenoid valve coil, and the lifting cylinder is lifted in place when the air pressure limiting valve 51 is triggered in the lifting process.
2. Mechanical operation: the manual buttons below the solenoid valves corresponding to the first electric control air pressure valve 21, the second electric control air pressure valve 22 and the third electric control air pressure valve 23 can be pushed by small-sized inner hexagonal or other tools to realize corresponding working condition operation, the lifting cylinder is lifted up when the manual button below the first electric control air pressure valve 21 is pressed, the lifting cylinder is slowly lowered when the manual button below the second electric control air pressure valve 22 is pressed, the lifting cylinder is lowered when the manual button below the third electric control air pressure valve 23 is pressed, and the manual mechanical operation method needs to climb to the hydraulic box behind the cab to operate.
In the embodiment of the invention, a special combination mode is adopted, an electric control air valve is used for controlling the reversing of an air path, and the direction of a hydraulic loop of an oil cylinder is controlled by controlling a hydraulic valve, so that the ascending and descending of the dump truck are realized. The combined valve comprises three electric control air valves which respectively control the ascending, descending and slow descending of the oil cylinder. The control gas circuit in the combination valve is connected with an external pneumatic control limit valve in series to ensure the operation safety protection of the dumper.
Unless otherwise defined, all terms used herein are intended to have the meanings commonly understood by those skilled in the art. The described embodiments of the present invention are intended to be illustrative only and not to limit the scope of the invention, and various other alternatives, modifications, and improvements may be made by those skilled in the art within the scope of the invention, and therefore the invention is not limited to the above embodiments but only by the claims.
Claims (8)
1. A redundant control electric control gas circuit hydraulic valve for a dumper, which comprises a pneumatic control hydraulic valve, at least two electric control pneumatic valves, a control gas circuit and a hydraulic oil circuit,
the hydraulic oil way comprises a pressure oil way, an oil return way and a driving oil way, and the pressure oil way and the oil return way are both communicated between the pneumatic control hydraulic valve and a hydraulic oil power source; the driving oil way is communicated between the pneumatic control hydraulic valve and a controlled hydraulic device;
the control air circuit comprises an air supply circuit and at least two operation air circuits, and the air supply circuits respectively supply air for the electric control air pressure valve; each operation gas circuit is respectively connected with the electric control pneumatic valve and the pneumatic control hydraulic valve;
controlling the air supply of each operation air passage to be respectively connected through each electric control air pressure valve so as to control the air control hydraulic valve to switch the state of the driving oil passage to be disconnected, or the driving oil passage is communicated with the pressure oil passage, or the driving oil passage is communicated with the oil return passage;
the pneumatic control hydraulic valve at least comprises a first air port, a second air port and a third air port; when the first air receiving port is ventilated, the driving oil way is communicated with the pressure oil way; when the second air receiving port is ventilated, the driving oil way is communicated with the oil return way part; when the third air receiving port is ventilated, the driving oil way is fully communicated with the oil return way;
the number of the electric control air pressure valves is at least three, and the electric control air pressure valves are at least a first electric control air pressure valve, a second electric control air pressure valve and a third electric control air pressure valve respectively; the first electric control air pressure valve is connected with one air supply path and one exhaust path, and is communicated with the first air port through a first operation air path; the second electric control air pressure valve is connected with one air supply path and one exhaust path, and is communicated with the second air receiving port through a second operation air path; the third electric control air pressure valve is connected with one air supply path and one exhaust path, and is communicated with the third air port through a third operation air path;
the third operation air passage is connected with a first shuttle valve in series, and one side, close to the third electric control air pressure valve, of the third operation air passage is connected with an air inlet of the first shuttle valve; one side of the third operation air path, which is close to the pneumatic control hydraulic valve, is connected with an air outlet of the first shuttle valve; the second operation air path is connected with the other air inlet of the first shuttle valve;
the first electric control air pressure valve, the second electric control air pressure valve and the third electric control air pressure valve share one air source.
2. The electrically controlled pneumatic hydraulic valve of claim 1, wherein: the manual proportional pneumatic reversing valve is connected with a gas supply path and a gas exhaust path, and is connected with a gas supply operation path and a gas return operation path; the first operation air path is connected with a second shuttle valve in series, and one side, close to the first electric control air pressure valve, of the first operation air path is connected with an air inlet of the second shuttle valve; one side of the first operation air path, which is close to the pneumatic control hydraulic valve, is connected with an air outlet of the second shuttle valve; the oil supply operation gas circuit is connected with the other gas inlet of the second shuttle valve; a third shuttle valve is connected in series on the third operation air path, and one side, close to the first shuttle valve, of the third operation air path is connected into an air inlet of the third shuttle valve; one side of the third operation air path, which is close to the pneumatic control hydraulic valve, is connected with an air outlet of the third shuttle valve; the oil return operation gas circuit is connected with the other gas inlet of the third shuttle valve; and controlling the first or third operation gas paths to be respectively communicated with gas supply through the manual proportional pneumatic control reversing valve so as to control the pneumatic control hydraulic valve to switch the driving oil path to be communicated with the pressure oil path or to be communicated with the oil return path.
3. The electrically controlled pneumatic hydraulic valve of claim 2, wherein: the first operation gas circuit or the oil supply operation gas circuit is connected in series with a limit valve, the limit valve is a normally-open two-position two-way valve, and when the controlled hydraulic device reaches the limit position, the limit valve is triggered to cut off the first operation gas circuit or the oil supply operation gas circuit.
4. The electrically controlled pneumatic hydraulic valve of claim 2, wherein: the first control air pressure valve is coupled with the first electromagnetic limit valve, and when the controlled hydraulic device reaches the limit position, the first control air pressure valve is triggered to cut off the first operation air passage.
5. The electrically controlled pneumatic and hydraulic valve according to any one of claims 1 to 2, wherein: the electric control pneumatic valve is a normally-off two-position three-way reversing valve, and a composite control mode of electromagnetic control and manual control is adopted.
6. The redundant control electric control gas circuit hydraulic combination valve for the dumper is characterized by comprising a hydraulic valve body and a gas circuit valve body,
the hydraulic valve body comprises a pneumatic control hydraulic valve, a pressure oil path interface, an oil return path interface and a driving oil path interface;
the gas circuit valve body comprises at least two electric control gas pressure valves, at least two operation gas circuits and a gas supply interface, and the electric control gas pressure valves are respectively supplied with gas through the gas supply interface; each operation gas circuit is respectively connected with gas circuit interfaces of the electric control gas pressure valve and the pneumatic control hydraulic valve;
controlling the respective connection and gas supply of each operation gas circuit through each electric control gas pressure valve so as to control the pneumatic control hydraulic valve to switch the state of the driving oil circuit interface to be disconnected, or the driving oil circuit interface is communicated with the pressure oil circuit interface, or the driving oil circuit interface is communicated with the oil return circuit interface;
the gas path interface of the pneumatic control hydraulic valve at least comprises a first gas port, a second gas port and a third gas port; when the first air receiving port is ventilated, the driving oil way is communicated with the pressure oil way; when the second air receiving port is ventilated, the driving oil way is communicated with the oil return way part; when the third air receiving port is ventilated, the driving oil way is fully communicated with the oil return way;
the at least two electric control air pressure valves are at least three, namely at least a first electric control air pressure valve, a second electric control air pressure valve and a third electric control air pressure valve; the first electric control air pressure valve is connected with an air supply channel and an exhaust channel, and is communicated with the first air receiving port through a first operation air channel; the second electric control air pressure valve is connected with one air supply path and one exhaust path, and is communicated with the second air receiving port through a second operation air path; the third electric control air pressure valve is connected with one air supply path and one exhaust path, and is communicated with the third air port through a third operation air path;
the third operation air passage is connected with a first shuttle valve in series, and one side, close to the third electric control air pressure valve, of the third operation air passage is connected with an air inlet of the first shuttle valve; one side of the third operation air path, which is close to the pneumatic control hydraulic valve, is connected with an air outlet of the first shuttle valve; the second operation air path is connected with the other air inlet of the first shuttle valve;
the first electric control air pressure valve, the second electric control air pressure valve and the third electric control air pressure valve share one air source.
7. The electrically controlled pneumatic hydraulic combination valve of claim 6, wherein: the hydraulic valve body and the air path valve body are fixedly connected into a whole.
8. A redundant control electric control gas circuit hydraulic system for a dumper, comprising a lifting hydraulic cylinder, a hydraulic oil power source and the electric control gas circuit hydraulic valve as set forth in any one of claims 1 to 5, wherein the hydraulic oil power source is connected with the lifting hydraulic cylinder through the electric control gas circuit hydraulic valve, and the electric control gas circuit hydraulic valve controls the lifting hydraulic cylinder to lift, drop or stop.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510052340.3A CN105984364B (en) | 2015-01-30 | 2015-01-30 | Redundant control electric control gas circuit hydraulic valve and system for dumper |
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| CN201510052340.3A CN105984364B (en) | 2015-01-30 | 2015-01-30 | Redundant control electric control gas circuit hydraulic valve and system for dumper |
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| CN105984364A CN105984364A (en) | 2016-10-05 |
| CN105984364B true CN105984364B (en) | 2023-06-09 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110792117A (en) * | 2019-11-04 | 2020-02-14 | 广西柳工机械股份有限公司 | Operating device for loader actuating mechanism |
| CN112918359A (en) * | 2019-12-06 | 2021-06-08 | 陕西汽车集团有限责任公司 | Electric control gas pilot hydraulic system for dump truck |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2386233Y (en) * | 1999-08-05 | 2000-07-05 | 深圳威立液压工业有限公司 | Electric pneumatic and discharge combination controlled large flow combined change valve for dump truck |
| JP4135843B2 (en) * | 1999-10-06 | 2008-08-20 | 株式会社小松製作所 | Dump truck body vertical swing device |
| CN2779131Y (en) * | 2005-04-13 | 2006-05-10 | 吴建华 | Pneumatic controlled lifting valve of self-dumping car |
| CN201291792Y (en) * | 2008-10-16 | 2009-08-19 | 湘潭电机股份有限公司 | Lift hydraulic integrated system of electric power wheel self-discharging vehicle |
| US8752372B2 (en) * | 2010-05-21 | 2014-06-17 | Deere & Company | Regenerative hydraulic circuit for dump truck bin lift cylinder |
| CN202827257U (en) * | 2012-08-16 | 2013-03-27 | 秦皇岛天业通联重工股份有限公司 | Hydraulic lifting control system for mine self-discharging vehicle and mine self-discharging vehicle |
| CN203511403U (en) * | 2013-10-31 | 2014-04-02 | 无锡英特帕普威孚液压有限责任公司 | Hydraulic lifting system for self-discharging train |
| CN204452157U (en) * | 2015-01-30 | 2015-07-08 | 中国国际海运集装箱(集团)股份有限公司 | Dumping car redundancy manipulates automatically controlled gas circuit hydraulic valve and system |
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