CN217102961U - Forklift hydraulic system for overturning large-scale component - Google Patents
Forklift hydraulic system for overturning large-scale component Download PDFInfo
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- CN217102961U CN217102961U CN202220430197.2U CN202220430197U CN217102961U CN 217102961 U CN217102961 U CN 217102961U CN 202220430197 U CN202220430197 U CN 202220430197U CN 217102961 U CN217102961 U CN 217102961U
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Abstract
The utility model discloses a forklift hydraulic system for overturning large components, which comprises an electric control handle, a rotating mechanism, a horizontal moving oil cylinder and a pressing oil cylinder, wherein the rotating mechanism, the horizontal moving oil cylinder and the pressing oil cylinder are arranged on a forklift attachment, the pressing oil cylinder and the rotating mechanism are connected through an integrated valve block, a main multi-way valve and a hydraulic oil tank in turn to form respective hydraulic loops, and the large components are respectively clamped and rotated; the main multi-way valve is connected with the horizontal moving oil cylinder to form a hydraulic circuit so that the large-scale component is centered on the forklift attachment; and the signal end of the electric control handle is electrically connected with the integrated valve block and the main multi-way valve respectively. This application adopts fork truck to realize transporting the operation to large-scale component to realized centering, compressing tightly and upset operation and quick short distance transition to it. The center of gravity of the large-sized component is kept in the middle in the operation process of overturning and the like, and safety risks such as deflection, irregular shaking, sudden impact and the like are avoided.
Description
Technical Field
The utility model relates to a handling tool vehicle technical field, concretely relates to fork truck hydraulic system for upset of large-scale component.
Background
The concrete prefabricated member is a concrete product processed and produced in a factory in a standardized and mechanized mode, and with the continuous development of the building industry, various concrete prefabricated members are widely applied to various buildings at present and play an important role in national economy. Need a large amount of large-scale cement prefab to be under construction like the tunnel job site, and need transport the operation between the different places, remove the simple and easy position of operation such as vertical state with convenient transportation, installation, loading and unloading from the horizontal state with the cement prefab if needs. At present, hoisting operation is mostly carried out by cranes such as a crane or a crane, but the placing state of the large-scale cement prefabricated part is changed by the hoisting mode of the crane, so that the efficiency is low and the operation is difficult; the lifting is limited by the space of the site, and short-distance transition cannot be rapidly carried out; in addition, the gravity center position of a large component is uncontrollable in the process of operation such as overturning, and the like, so that safety risks such as deflection, irregular shaking, sudden impact and the like exist.
So the utility model discloses a heavy fork truck comes to overturn to it, operation such as transportation, and involves to rise to its cargo device who bears when heavy fork truck industry, descends, slope, side and moves, rotatory, remove, turn to the operation action such as, and these operations all need realize through one set of hydraulic system. Therefore, a hydraulic system for overturning a large member needs to be developed for a heavy forklift.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a fork truck hydraulic system for large-scale component upset is applicable to the upset operation of large-scale component, realizes compressing tightly, placed in the middle, steady rotation to large-scale component to and the operation of shifting fast.
In order to achieve the above object, the utility model provides a following technical scheme:
the forklift hydraulic system for overturning the large-scale component comprises an electric control handle, a rotating mechanism, a horizontal moving oil cylinder and a pressing oil cylinder, wherein the rotating mechanism, the horizontal moving oil cylinder and the pressing oil cylinder are arranged on a forklift attachment, and the pressing oil cylinder and the rotating mechanism are connected through an integrated valve block, a main multi-way valve and a hydraulic oil tank in sequence to form respective hydraulic loops so as to clamp and rotate the large-scale component respectively; the main multi-way valve is connected with the horizontal moving oil cylinder to form a hydraulic circuit so that the large-scale component is centered on the forklift attachment; and the signal end of the electric control handle is electrically connected with the integrated valve block and the main multi-way valve respectively.
This application is improved in current fork truck hydraulic system, and automatically controlled handle, integrated valve piece, main multiple unit valve, hydraulic tank, hydro-cylinder etc. all have on the fork truck, so specific structure does not do the detail here.
For example, the electric control handle is an integrated handle integrated with a hydraulic oil circuit and a circuit containing a controller, and is a commercially available existing product, such as the electric control handle manufactured by walfield corporation of italy, model number DRFC 15061.
According to the technical scheme, the rotating mechanism is a hydraulic rotating motor, the cylinder body of the horizontal moving oil cylinder is fixedly mounted on a forklift attachment, a piston rod is fixedly connected with a forklift frame, and the forklift attachment is movably mounted on the forklift frame and is driven to rotate and move horizontally through the rotating mechanism and the horizontal moving oil cylinder.
In a further scheme, a centering positioning block is mounted on the forklift attachment, and a position sensor for detecting the centering positioning block is mounted on the fork frame; and the output end of the position sensor is electrically connected with the electric control handle.
According to the further scheme, an oil cylinder stroke sensor is mounted on a piston rod of the pressing oil cylinder and used for detecting the stroke of the oil cylinder, and the output end of the oil cylinder stroke sensor is electrically connected with the electric control handle.
The oil cylinder stroke sensor is also a known product and can be purchased in the market, such as WNAG series static magnetic grid oil cylinder stroke detectors produced by Wuhan Yingzi scientific and technological development Limited liability company.
In a further scheme, the integrated valve block comprises a first oil way for connecting the pressing oil cylinder and the main multi-way valve, and a second oil way for connecting the rotating mechanism and the main multi-way valve; the first oil way is connected with a hydraulic lock and a second three-position four-way electromagnetic valve in series, and the second oil way is connected with a first three-position four-way electromagnetic valve in series; and the first three-position four-way electromagnetic valve and the second three-position four-way electromagnetic valve are electrically connected with the electric control handle.
In a further scheme, the electric control handle is respectively and electrically connected with the integrated valve block, the main multi-way valve, the first three-position four-way electromagnetic valve and the second three-position four-way electromagnetic valve through the integrated controller.
In a further scheme, an adjustable overflow valve is connected in series with the oil inlet end of the second three-position four-way solenoid valve.
According to the further scheme, the first oil way and the second oil way are respectively connected with a pressure sensor in series, the output end of the pressure sensor is connected with a display screen, and the power supply end of the display screen is electrically connected with the integrated controller.
In a further scheme, the main multi-way valve comprises at least two main valve plates, and a power supply end of each main valve plate is connected in series with a proportional electromagnetic valve to control the working position of a valve core of the proportional electromagnetic valve; two working oil ports of one main valve plate are respectively connected with two oil ways in the integrated valve block; two working oil ports of the other main valve plate are respectively connected with a rod cavity and a rodless cavity of the horizontal moving oil cylinder.
In a further scheme, an oil inlet of the main multi-way valve is connected with a hydraulic oil tank sequentially through a one-way valve, a variable pump and an oil absorption filter; and the signal end of the variable pump is connected with the signal end of the main multi-way valve.
The hydraulic system controls the turning process of the large-scale component as follows:
step 1: connecting a pressure signal end of a main valve plate in the main multi-way valve with a signal end of a variable pump, feeding back a pressure signal of the main valve plate to the variable pump at any time to control the rotating speed of the variable pump and the output flow of hydraulic oil, wherein the system main pressure is 225bar, the rotating speed of the variable pump is controlled between 1800 plus-minus 1910r/min, and the output flow of the hydraulic oil is accurately controlled to be 46 plus-minus 3L/min during work;
step 2: placing a large component on the fork frame, operating a clamping button on an electric control handle, operating a main valve sheet in the main multi-way valve, and inputting hydraulic oil to the integrated valve block; meanwhile, a valve core of a second three-position four-way electromagnetic valve in the integrated valve block works, a first oil way is opened, hydraulic oil sequentially enters a pressing oil cylinder through the second three-position four-way electromagnetic valve and a hydraulic lock, and the pressing oil cylinder acts to clamp a large component;
and step 3: when an oil cylinder stroke sensor arranged on a piston rod of the pressing oil cylinder detects that the oil cylinder stroke reaches the maximum value, a signal is fed back to the integrated controller to disconnect a clamping signal of the electric control handle, the pressing oil cylinder stops working and locks an oil way under the action of a hydraulic lock, so that the pressing force of the pressing oil cylinder on a large-scale component is kept;
and 4, step 4: the position sensor on the fork frame detects that the forklift attachment is not centered through the centering positioning block, a detection signal is sent to the integrated controller, the integrated controller controls the other main valve plate in the main multi-way valve to work, hydraulic oil is input to the horizontal moving oil cylinder, and the horizontal moving oil cylinder drives the forklift attachment and the large component to horizontally move on the fork frame, so that the forklift attachment and the large component are centered in real time;
and 5: when a rotary button on the electric control handle is operated, one main valve plate in the main multi-way valve works and inputs hydraulic oil to the integrated valve block; meanwhile, a valve core of a first three-position four-way electromagnetic valve in the integrated valve block works, a second oil way is opened, and hydraulic oil enters a hydraulic rotating motor through the first three-position four-way electromagnetic valve to drive a forklift attachment to rotate with a large component.
The utility model discloses well pressure sensor, position sensor, proportional solenoid valve, hydraulic pressure lock, adjustable overflow valve, check valve, tribit four-way solenoid valve, integrated control ware etc. are the known product in this field, can purchase on the market. The utility model discloses select the product of corresponding model according to actual need, directly come in using its technique of this application, do not relate to improvements such as to its inner structure, function, principle. Wherein the integrated controller is an MC43 integrated controller from Parker, Inc.
Compared with the prior art, the product has the advantages that:
1. the large-scale component is transported and turned over by the aid of the forklift, so that transportation, installation, loading and unloading are facilitated, efficiency is high, and safety is high; and can realize quick short-distance transition.
The application is improved in the existing forklift hydraulic system, and the innovative forklift is characterized in that an electric control handle, an integrated valve block, a main multi-way valve, a hydraulic oil tank, an oil cylinder and the like are used together for the forklift for overturning large components, so that the large components are centered, pressed and overturned, and are quickly transferred in short distance. The center of gravity of the large-sized component is kept in the middle in the operation process of overturning and the like, and safety risks such as deflection, irregular shaking, sudden impact and the like are avoided.
2. According to the forklift truck, the centering positioning block is mounted on the forklift truck accessory, and the position sensor for detecting the position of the centering positioning block is mounted on the fork truck frame, so that the forklift truck accessory is ensured to be located at the center of the fork truck frame, and the condition that the occurrence of unbalance loading causes unsafe conditions is avoided; the position positioning block and the position sensor interact, the large component is adjusted to be centered on the fork frame in real time through the horizontal moving oil cylinder, safety of the large component in high-position lifting and overturning actions is facilitated, and longitudinal stability of the whole truck is improved.
3. This application adopts hydraulic system control's heavy fork truck to carry large-scale component, and its is efficient to can realize quick reliable compressing tightly, rotation and the operation of transition of large-scale component.
4. This application adopts integrated controller to come to control integrated valve block, main multiple unit valve, realizes the on-off of each oil circuit, and the work of accurate control holding down hydro-cylinder, hydraulic pressure swing motor, horizontal migration hydro-cylinder.
5. The pressure generated by the load of the two main valve pieces on the main multi-way valve is collected and fed back to the variable pump, and then the flow of hydraulic oil is controlled through the flow valve inside the variable pump, namely the rotating speed and the output flow of the variable pump are controlled, so that the actions of overturning, transition and the like of a large member are more stable.
6. This application is with electric control handle, integrated control ware, the mutual cooperative control of display, and electric control handle's operating signal passes through the case work of each fuel tap of integrated control ware accurate control, and the display screen can show the oil pressure of two oil circuits in the integrated valve piece in real time to can do real-time control to the action of holding down cylinder, make operation state discernment safer, more high-efficient.
Drawings
Figure 1 is a schematic diagram of a hydraulic system of the present application,
figure 2 is a schematic view of the main multiplex valve of the present application,
in the figure, the solid line is an oil path, and the dotted line is a circuit or a signal line.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1: the forklift hydraulic system for overturning the large-scale component comprises an electric control handle 10, a rotating mechanism, a horizontal moving oil cylinder 6 and a pressing oil cylinder 14, wherein the rotating mechanism, the horizontal moving oil cylinder 6 and the pressing oil cylinder 14 are arranged on a forklift attachment, and the pressing oil cylinder 14 and the rotating mechanism are connected through an integrated valve block 16, a main multi-way valve 2 and a hydraulic oil tank 1 in sequence to form respective hydraulic loops so as to clamp and rotate the large-scale component respectively; the main multi-way valve 2 and the horizontal moving oil cylinder 8 are connected to form a hydraulic circuit, so that a large component is centered on a forklift attachment; the signal end of the electric control handle 10 is electrically connected with the integrated valve block 16 and the main multi-way valve 2 respectively.
In a further scheme, the rotating mechanism is a hydraulic rotating motor 13, the cylinder body of the horizontal moving oil cylinder 8 is fixedly installed on a forklift attachment, a piston rod is fixedly connected with a forklift frame, and the forklift attachment is movably installed on the forklift frame and is driven to rotate and move horizontally through the rotating mechanism and the horizontal moving oil cylinder 8.
Since the forklift attachment is movably mounted on the fork frame, the hydraulic rotating motor 13 and the horizontal movement cylinder 6 are mounted on the forklift attachment, and a large member is loaded on the forklift attachment. Therefore, the hydraulic rotary motor 13 rotates with the forklift attachment and the large member when operating, and the horizontal movement cylinder 8 moves horizontally with the forklift attachment and the large member when operating to adjust the position thereof at the center of the fork frame, so that the center of gravity can be maintained without tilting during lifting or rotating.
In a further scheme, a centering positioning block 8 is mounted on the forklift attachment, and a position sensor 9 for detecting the centering positioning block 8 is mounted on the fork frame; the output end of the position sensor 9 is electrically connected with an electric control handle 10.
The position positioning block 8 and the position sensor 9 interact with each other, the large-scale component is kept centered on the fork frame in real time through the horizontal moving oil cylinder, safety in high-position lifting and overturning actions of the large-scale component is facilitated, unbalanced loading is avoided, longitudinal stability of the whole truck is improved, and automatic centering adjustment is achieved.
The application is improved in the existing forklift hydraulic system, wherein an electric control handle, an integrated valve block, a main multi-way valve, a hydraulic oil tank, an oil cylinder and the like are all existing equipment on a forklift, the embodiment innovatively applies the integrated valve block to the forklift for overturning large-scale components together, and the large-scale components are centered, pressed and overturned, and quickly transferred in short distance. The center of gravity of the large-sized component is kept in the middle in the operation process of overturning and the like, and safety risks such as deflection, irregular shaking, sudden impact and the like are avoided.
For example, the electric control handle is an integrated handle integrated with a hydraulic oil circuit and a circuit containing a controller, and is a commercially available existing product, such as an electric control handle of model DRFC15061 manufactured by Walvoil corporation in Italy; the integrated controller is an MC43 integrated controller of Parker company; the oil cylinder stroke sensor is a WNAG series static magnetic grid oil cylinder stroke detector produced by Wuhan Yingjia scientific and technological development Limited liability company.
In a further scheme, an oil cylinder stroke sensor 15 is mounted on a piston rod of the pressing oil cylinder 14 and used for detecting the stroke of the oil cylinder, and the output end of the oil cylinder stroke sensor 15 is electrically connected with the electric control handle 10. The oil cylinder stroke sensor detects the oil cylinder stroke, when the pressing oil cylinder reaches the maximum stroke, the signal is fed back to the integrated controller to disconnect the clamping signal of the electric control handle, the pressing oil cylinder stops working and locks an oil way under the action of the hydraulic lock, so that the pressing force of the pressing oil cylinder on the large-scale component is kept, namely the pressing oil cylinder clamps the large-scale component without moving.
In a further scheme, the integrated valve block 16 comprises a first oil path for connecting the pressing oil cylinder 14 and the main multi-way valve 2, and a second oil path for connecting the rotating mechanism and the main multi-way valve 2; a hydraulic lock 161 and a second three-position four-way electromagnetic valve 163 are connected in series to the first oil path, and a first three-position four-way electromagnetic valve 162 is connected in series to the second oil path; the first three-position four-way solenoid valve 162 and the second three-position four-way solenoid valve 163 are electrically connected to the electric control handle 10.
In a further scheme, the electric control handle 10 is electrically connected with the integrated valve block 16, the main multi-way valve 2, the first three-position four-way solenoid valve 162 and the second three-position four-way solenoid valve 163 through the integrated controller 11.
In a further scheme, an adjustable overflow valve 164 is connected in series with the oil inlet end of the second three-position four-way solenoid valve 163.
The electric control handle 10 outputs an action signal, the second three-position four-way solenoid valve 163 works, the spool of the second three-position four-way solenoid valve 163 is at the right position, the first oil way in the second three-position four-way solenoid valve 163 is opened, the main multi-way valve 2 supplies oil to the first oil way in the integrated valve block 16, specifically enters from the port E5 of the integrated valve block 16, passes through the adjustable overflow valve 164, the second three-position four-way solenoid valve 163 and the hydraulic lock 161, then enters the rodless cavity of the pressing oil cylinder 14 from the port F4 on the integrated valve block 16, pushes the piston rod of the pressing oil cylinder 14 to move, and at this time, the rod cavity of the pressing oil cylinder 14 returns oil to the port F3 on the integrated valve block 16, and then returns to the port T1 of the integrated valve block 16 through the hydraulic lock 161 and the second three-position four-way solenoid valve 163, and directly returns to the hydraulic oil tank 1.
If the electric control handle 10 is loosened, the second three-position four-way electromagnetic valve 163 does not work, the valve core is in the middle position to close the working oil port, the oil circuit is locked by the pressing oil cylinder under the action of the hydraulic lock 161 in the integrated valve block 16, the oil in the circuit does not flow, and the pressing oil cylinder stops moving.
If the electric control handle 10 is not loosened, the second three-position four-way electromagnetic valve 163 continues to work, but after the piston rod of the pressing oil cylinder moves to a certain position, the oil cylinder stroke sensor 15 acts to send a detection signal to the integrated controller, the integrated controller drives the electric control handle 10 and the second three-position four-way electromagnetic valve 163 to break off working signals, the second three-position four-way electromagnetic valve 163 does not work, the pressing oil cylinder 14 locks an oil path under the action of the hydraulic lock 161, and a certain pressing force is kept while a large component is prevented from being crushed.
In a further scheme, the first oil path and the second oil path are respectively connected in series with a pressure sensor 17, an output end of the pressure sensor 17 is connected with a display screen 12, and a power supply end of the display screen 12 is electrically connected with the integrated controller 11.
The pressure sensor 17 transmits the oil pressure of the first oil circuit and the second oil circuit in the integrated valve block to the display 12 through the wiring harness in real time, and monitors in real time to provide a control basis.
In a further scheme, as shown in fig. 2, the main multi-way valve 2 includes a first main valve plate 21 and a second main valve plate 23, a power supply end of the first main valve plate 21 is connected in series with a first proportional solenoid valve 22 for controlling a working position of a valve core thereof, and a power supply end of the second main valve plate 23 is connected in series with a second proportional solenoid valve 24 for controlling a working position of a valve core thereof; the main multi-way valve 2 is provided with an oil inlet P1 port, a working oil port E1 port, a working oil port E2 port, a working oil port C1 port, a working oil port C2 port, an oil return port T2 port, an oil drain port T3 port and a signal LS1 port. Two working oil ports of the first main valve plate 21 are respectively connected with two oil passages in the integrated valve block 16 through an E1 port and an E2 port; two working oil ports of the second main valve plate 23 are respectively connected with a rod cavity and a rodless cavity of the horizontal moving oil cylinder 6 through a port C1 and a port C2.
In a further scheme, an oil inlet of the main multi-way valve 2 is connected with the hydraulic oil tank 1 sequentially through a one-way valve 3, a variable pump 5 and an oil absorption filter 4; and the signal end of the variable pump 5 is connected with the signal end of the main multi-way valve 2.
When the whole vehicle works, the variable pump 5 sucks clean hydraulic oil from the hydraulic oil tank 1 through the oil suction filter 4, then the hydraulic oil enters the main multi-way valve 2 through the one-way valve 3, pressure generated by the main valve piece load on the main multi-way valve 2 is fed back to the variable pump 5, and then the variable pump 5 is reasonably controlled by driving a motor to regulate speed.
The variable displacement pump is a pump with variable displacement and is also a commercially available existing product, when a loop in the system works, a load needs to feed back an LS signal (namely a load amount), and when the pressure of high-pressure oil of an oil pump is exceeded, the flow of the load is increased by controlling the valve core of a flow valve in the variable displacement pump to work.
The main working process of the hydraulic system is as follows:
the embodiment is provided with four hold-down cylinders, as shown in fig. 1:
when the whole vehicle works, the variable pump 5 sucks clean hydraulic oil from the hydraulic oil tank 1 through the oil suction filter 4, the hydraulic oil enters the main multi-way valve 2 through the one-way valve 3, pressure generated by loads of the two main valve plates 21 and 23 on the main multi-way valve 2 is fed back to an LS port on the variable pump 5 through an LS1 port on the main multi-way valve 2, and the rotating speed and the output flow of the variable pump 5 are reasonably controlled together with the motor. The electric control handle 10 is operated to control the motion, which specifically comprises the following steps:
1. when a clamping button on the electric control handle 10 is operated, an electric signal transmits an action execution signal to a coil on the second three-position four-way electromagnetic valve 163 and the first proportional electromagnetic valve 22 on the main multi-way valve 2 through the integrated controller 11, and the second three-position four-way electromagnetic valve 163 works at the right position to open a first oil path; the first proportional solenoid valve 22 controls the first main valve plate 21 to work at the lower position, at this time, the hydraulic oil passing through the check valve 3 enters from the port P1 on the main multiplex valve 2, then, the oil is supplied to an E5 port on the integration valve block 16 through an E2 port after passing through the first main valve plate 21, and then enters a hydraulic lock 161 through K11 and K2 ports of an adjustable overflow valve 164 on a first oil path, and then is supplied to K3 ports and K6 ports of a second three-position four-way solenoid valve 163, and finally is divided into four paths after coming out from an F4 port on the integration valve block 16, and is respectively supplied to rodless chambers (X8, X6, X4 and X1 ports) of four compression cylinders 14 to push piston rods of the compression cylinders 14 to move, and at this time, rod chambers (X7, X5, X3 and X2 ports) of the four compression cylinders 14 return to an F3 port on the integration valve block 16, and returns to a T1 port of the integration valve block 16 through the hydraulic lock 161 and the second three-position four-way solenoid valve 163, and then directly returns to the hydraulic oil tank 1.
If the electric control handle 10 is loosened, the second three-position four-way electromagnetic valve 163 does not work, the valve core is in the middle position and closes the working oil port, the four oil cylinder pressing oil cylinders 14 lock the oil path under the action of the hydraulic lock 231 in the integrated valve block 16, the pressing oil cylinders stop moving, and the pressing state is kept.
At this time, if the electric control handle 10 is not loosened, the second three-position four-way electromagnetic valve 163 continues to operate, but after the piston rod of the pressing oil cylinder moves to a certain position, the oil cylinder stroke sensor 15 will function, and send a detection signal to the integrated controller, the integrated controller drives the electric control handle 10 and the second three-position four-way electromagnetic valve 163 to disconnect the operating signal, that is, the electric control handle 10 automatically stops, at this time, the second three-position four-way electromagnetic valve 163 does not operate, the pressing oil cylinder 14 locks the oil path under the action of the hydraulic lock 161, the pressing oil cylinder stops moving, the pressing state is maintained, and a certain pressing force is maintained while a large component is prevented from being crushed.
2. When the electric control handle 10 outputs an action signal to enable the valve core of the second three-position four-way solenoid valve 163 to work at the left position, the oil path is switched, hydraulic oil in the main multi-way valve 2 enters an E5 port of the integrated valve block 16 through an E2 port, then enters K11 and K2 ports of the adjustable overflow valve 164, enters a hydraulic lock 161 through K3 ports and K5 ports of the second three-position four-way solenoid valve 163, finally is divided into four paths after coming out from an F3 port on the integrated valve block 16, and is respectively supplied to rod chambers (X7, X5, X3 and X2 ports) of the four compression oil cylinders 14 to push a piston rod of the compression oil cylinders 14 to move, at the moment, rodless chambers (X8, X6, X4 and X1 ports) of the four compression oil cylinders 14 return to F4 ports on the integrated valve block 16, and returns to a T1 port of the integrated valve block 16 through the hydraulic lock 161 and the second three-position four-way solenoid valve 163, and directly returns to the hydraulic oil tank 1. The operation of loosening the large preforms by the hold-down cylinder 14 achieves automatic control of the hold-down and release actions of the hold-down cylinder.
3. When a button of the rotary function corresponding to the electric control handle 10 is operated, the electric signal transmits an action execution signal to a coil on the first three-position four-way electromagnetic valve 162 and the first proportional electromagnetic valve 22 on the main multi-way valve 2 through the integrated controller 11, the first three-position four-way electromagnetic valve 162 works at the right position, and the second oil way is opened; the first proportional solenoid valve 22 in the main multi-way valve 2 controls the first main valve plate 21 to work at the upper position. The hydraulic oil is directly connected to an E3 port on the integrated valve block 16 through oil outlet of an E1 port, then passes through K7 ports and K10 ports on the first three-position four-way electromagnetic valve 162, is directly connected with the hydraulic rotary motor 13 from an F2 port of the integrated valve block 16, and drives the forklift attachment and the large member to rotate together through the rotating torque of the hydraulic rotary motor 13.
As above, when the first three-position four-way solenoid valve 162 operates at the left position, the hydraulic rotary motor 13 realizes reverse rotation.
4. When a centering button on the electric control handle 10 is operated, an electric signal transmits an action execution signal to a second proportional solenoid valve 24 on the main multi-way valve 2 through the integrated controller 11, the second main valve plate 23 works, hydraulic oil is respectively supplied to the horizontal moving oil cylinder 6 from a C1 port or a C2 port of the second main valve plate 23 through the second main valve plate 23, and meanwhile, the position positioning block 8 and the position sensor 9 interact with each other to keep the large-scale component centered on a forklift attachment in real time, so that the action safety and the unbalanced load of the large-scale component during high-position lifting are facilitated, the longitudinal stability of the whole forklift is improved, and the automatic centering adjustment is realized.
The first oil circuit and the second oil circuit in the integrated valve block 16 are respectively connected in series with a pressure sensor 17, and the pressure sensors 17 transmit and display the oil pressure of the first oil circuit and the oil pressure of the second oil circuit in the integrated valve block on the display 12 in real time through a wiring harness, so that the control basis is provided. The electric control handle 10, the integrated controller 11 and the display 12 are cooperatively controlled, so that energy is saved, and the working efficiency is higher.
Although the present description is described in terms of embodiments, not every embodiment includes only a single embodiment, and such description is for clarity only, and those skilled in the art should be able to integrate the description as a whole, and the embodiments can be appropriately combined to form other embodiments as will be understood by those skilled in the art.
Therefore, the above description is only a preferred embodiment of the present application, and is not intended to limit the scope of the present application; all changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims (10)
1. A fork truck hydraulic system for large-scale component upset, including automatically controlled handle (10) to and install rotary mechanism, horizontal migration hydro-cylinder (6) and the pressure cylinder (14) on the fork truck accessory, its characterized in that: the pressing oil cylinder (14) and the rotating mechanism are connected sequentially through the integrated valve block (16), the main multi-way valve (2) and the hydraulic oil tank (1) to form respective hydraulic loops, so that the large-scale component is clamped and rotated respectively; the main multi-way valve (2) is connected with the horizontal moving oil cylinder (6) to form a hydraulic circuit so that a large component is centered on the forklift attachment; and the signal end of the electric control handle (10) is electrically connected with the integrated valve block (16) and the main multi-way valve (2) respectively.
2. The forklift hydraulic system for large component turnover of claim 1, wherein: the hydraulic rotary motor (13) is adopted as the rotary mechanism, the cylinder body of the horizontal moving oil cylinder (6) is fixedly arranged on a forklift attachment, the piston rod is fixedly connected with a forklift frame, and the forklift attachment is movably arranged on the forklift frame and is driven to rotate and move horizontally through the rotary mechanism and the horizontal moving oil cylinder (6).
3. The forklift hydraulic system for large component turnover of claim 2, wherein: a centering positioning block (8) is mounted on the forklift attachment, and a position sensor (9) for detecting the centering positioning block (8) is mounted on the fork frame; the output end of the position sensor (9) is electrically connected with the electric control handle (10).
4. The forklift hydraulic system for large component turnover of claim 1, wherein: an oil cylinder stroke sensor (15) is installed on a piston rod of the pressing oil cylinder (14) and used for detecting the stroke of the oil cylinder, and the output end of the oil cylinder stroke sensor (15) is electrically connected with the electric control handle (10).
5. The forklift hydraulic system for large component turnover of claim 1, wherein: the integrated valve block (16) comprises a first oil path for connecting the pressing oil cylinder (14) and the main multi-way valve (2), and a second oil path for connecting the rotating mechanism and the main multi-way valve (2); a hydraulic lock (161) and a second three-position four-way electromagnetic valve (163) are connected to the first oil way in series, and a first three-position four-way electromagnetic valve (162) is connected to the second oil way in series; the first three-position four-way electromagnetic valve (162) and the second three-position four-way electromagnetic valve (163) are electrically connected with the electric control handle (10).
6. The forklift hydraulic system for large component tipping according to claim 5, wherein: the electric control handle (10) is electrically connected with the integrated valve block (16), the main multi-way valve (2), the first three-position four-way electromagnetic valve (162) and the second three-position four-way electromagnetic valve (163) through the integrated controller (11).
7. The forklift hydraulic system for large component tipping according to claim 5, wherein: and the oil inlet end of the second three-position four-way solenoid valve (163) is connected with an adjustable overflow valve (164) in series.
8. The forklift hydraulic system for large component tipping according to claim 5, wherein: the first oil way and the second oil way are respectively connected with a pressure sensor (17) in series, the output end of the pressure sensor (17) is connected with a display screen (12), and the power supply end of the display screen (12) is electrically connected with the integrated controller (11).
9. The forklift hydraulic system for large component turnover of claim 1, wherein: the main multi-way valve (2) comprises at least two main valve plates, and the power supply end of each main valve plate is connected in series with a proportional electromagnetic valve to control the working position of the valve core of the proportional electromagnetic valve; two working oil ports of one main valve plate are respectively connected with two oil ways in the integrated valve block (16); two working oil ports of the other main valve plate are respectively connected with a rod cavity and a rodless cavity of the horizontal moving oil cylinder (6).
10. The forklift hydraulic system for large component turnover of claim 1, wherein: an oil inlet of the main multi-way valve (2) is connected with the hydraulic oil tank (1) sequentially through the one-way valve (3), the variable pump (5) and the oil absorption filter (4); and the signal end of the variable pump (5) is connected with the signal end of the main multi-way valve (2).
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| CN202220430197.2U CN217102961U (en) | 2022-02-28 | 2022-02-28 | Forklift hydraulic system for overturning large-scale component |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115431683A (en) * | 2022-09-30 | 2022-12-06 | 中国煤炭科工集团太原研究院有限公司 | Multi-specification tire semi-automatic dismounting device and transportation equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115431683A (en) * | 2022-09-30 | 2022-12-06 | 中国煤炭科工集团太原研究院有限公司 | Multi-specification tire semi-automatic dismounting device and transportation equipment |
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