CN212297081U - Emergency operation hydraulic system and hydraulic hoist - Google Patents
Emergency operation hydraulic system and hydraulic hoist Download PDFInfo
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- CN212297081U CN212297081U CN202021363833.1U CN202021363833U CN212297081U CN 212297081 U CN212297081 U CN 212297081U CN 202021363833 U CN202021363833 U CN 202021363833U CN 212297081 U CN212297081 U CN 212297081U
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Abstract
The utility model discloses an emergency operation hydraulic system and hydraulic hoist. The disclosed emergency operation hydraulic system comprises a bidirectional flow regulation electric control valve, a hydraulic pump, a plurality of stroke detection sensors and a synchronous controller, wherein the bidirectional flow regulation electric control valve corresponds to a plurality of hydraulic power elements one by one; an oil discharge port of the hydraulic pump is communicated with a first oil port of the bidirectional flow regulating electric control valve; a second oil port of the bidirectional flow regulating electric control valve is connected with a first pipe joint for communicating a hydraulic cavity of a corresponding hydraulic power element; the stroke detection sensors are respectively connected with the signal input end of the synchronous controller through signals; the signal output end of the synchronous controller is respectively connected with the electric control end of the bidirectional flow regulating electric control valve through signals, and the through-flow of the bidirectional flow regulating electric control valve is controlled by a preset strategy according to the detection signal of the stroke detection sensor, so that all hydraulic power elements synchronously act. The emergency operation hydraulic system can meet the requirement of opening or closing a large gate with a plurality of hydraulic actuators while keeping the cost low.
Description
Technical Field
The utility model relates to a gate headstock gear emergency operation technique, in particular to no electric formula, emergency operation hydraulic system still relate to a hydraulic hoist including this emergency operation hydraulic system.
Background
Currently, in hydraulic engineering, hydroelectric engineering and shipping engineering, a gate is generally controlled to ascend or descend by a hoist so as to open or close the gate. The hoist generally uses a power source as a power source, is provided with a motor with proper power, and drives the gate to open or close through a hydraulic oil cylinder or a hoisting mechanism.
When the power supply fails, the hoist cannot work. At present, the emergency measure for the power supply failure is to configure a diesel engine to drive a generator to provide power, so as to ensure the normal operation of a motor, namely to configure a combination of the diesel engine and the generator. However, the output power of the combination of the diesel engine and the generator cannot be smaller than the motor power of the hoist, otherwise, the normal operation of the hoist cannot be ensured. Thus, the diesel engine + generator combination requires a large space and a corresponding control system, which results in high emergency costs and poor economy.
In addition, the hydraulic power is used as a power source, so that an emergency operation hydraulic system is configured for the hoist, and the hoist is subjected to emergency operation by using the power source provided by the hydraulic power system in an emergency state.
Under the condition of emergency operation by using hydraulic power, if the power of a hydraulic power system is low and the flow of supplied high-pressure oil is small, the hydraulic execution action is slow, a long time is often needed for operating the gate in place, and the execution delay is caused. In an emergency situation, people prefer to perform actions faster, and therefore, such delay results in failure of the purpose of emergency operation, which in turn causes untimely opening or closing of the gate, and thus accidents or other dangerous situations. If the power of the hydraulic power system is large, the problems of large space, high cost and poor economy are also caused.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an emergency operation hydraulic system, this emergency operation hydraulic system can satisfy the needs of opening or closing large-scale gate when keeping lower cost.
On the basis of providing the hydraulic system for emergency operation, the hydraulic hoist for the hydraulic system for emergency operation is further provided.
The utility model provides an emergency operation hydraulic system for the hydraulic hoist that includes a plurality of hydraulic power component, this emergency operation hydraulic system include with a plurality of hydraulic power component one-to-one two-way flow control electric valve, hydraulic pump, be used for detecting a plurality of stroke detection sensor and the synchronous controller of hydraulic power component stroke; an oil discharge port of the hydraulic pump is communicated with a first oil port of the bidirectional flow regulating electric control valve; a second oil port of the bidirectional flow regulating electric control valve is connected with a first pipe joint which is used for communicating a first hydraulic cavity corresponding to the hydraulic power element; the stroke detection sensors are respectively connected with the signal input end of the synchronous controller through signals; and the signal output end of the synchronous controller is respectively in signal connection with the electric control end of the bidirectional flow regulating electric control valve, and controls the through-flow of the bidirectional flow regulating electric control valve according to the detection signal of the stroke detection sensor by a preset strategy, so that all hydraulic power elements synchronously act.
By utilizing the emergency operation hydraulic system, during emergency operation, the first pipe joint can be communicated with hydraulic power elements such as a hydraulic cylinder or a hydraulic motor and the like, so that a plurality of hydraulic power elements with proper quantity can be operated simultaneously, and the plurality of hydraulic power elements are utilized to drive the gate to open or close; meanwhile, stroke data (the telescopic stroke of a hydraulic cylinder or the steering and rotating stroke of a hydraulic motor) of each hydraulic power element can be acquired through a stroke detection sensor for detecting the stroke of the hydraulic power element, the through-flow of the bidirectional flow regulating electric control valve is controlled by the synchronous controller according to the detected stroke data, the stroke of each hydraulic power element is further adjusted, the plurality of hydraulic power elements are guaranteed to move basically synchronously, and the requirement for opening or closing a large gate is further met. By utilizing the emergency operation hydraulic system, hydraulic cylinders with proper quantity can be matched according to actual needs, corresponding quantity of stroke detection sensor data is acquired, corresponding quantity of hydraulic power elements is controlled, the hydraulic system does not need to be additionally constructed, the characteristic that the power range of the hydraulic power system is large is fully utilized, the cost of the emergency operation hydraulic system can be reduced, and the economy of the emergency operation hydraulic system is ensured.
In a further technical scheme, the emergency operation hydraulic system further comprises the reversing control valve; an oil discharge port of the hydraulic pump is communicated with an oil inlet of the reversing control valve, and an oil return pipeline is communicated with an oil return port of the reversing control valve; a first working oil port of the reversing control valve is communicated with a first oil port of the bidirectional flow regulating electric control valve, and a second working oil port is connected with a second pipe joint for communicating a second working oil port of the hydraulic power element; in a first working state, an oil inlet and an oil return port of the reversing control valve are respectively communicated with a first working oil port and a second working oil port; and in a second working state, the oil inlet and the oil return port of the reversing control valve are respectively communicated with the second working oil port and the first working oil port. The hydraulic cylinder can be operated in two directions by hydraulic power through the reversing control valve, and adaptability and initiative of the emergency operation hydraulic system are improved.
In an optional technical scheme, the hydraulic power element is a hydraulic cylinder; the first working oil port and the second working oil port of the hydraulic power element are respectively communicated with a rod cavity and a rodless cavity of the hydraulic cylinder, the first pipe joint is a rod cavity joint, and the second pipe joint is a rodless cavity joint.
In the optional technical scheme, the device also comprises a control one-way valve and a back pressure on-off valve; the second working oil port of the reversing control valve is also connected with a control pipeline joint for communicating a hydraulic lock of the hydraulic cylinder; the second pipe joint is communicated with the control pipeline joint through the control one-way valve; the oil inlet and the hydraulic control port of the back pressure on-off valve are both communicated with the second working oil port of the reversing control valve; the oil outlet of the back pressure on-off valve is communicated with the second pipe joint. The back pressure on-off valve is arranged, so that corresponding back pressure can be formed, the hydraulic oil of the rodless cavity is prevented from doing no-pressure action, the hydraulic cylinder is actively unlocked only after the rodless cavity of the hydraulic cylinder builds proper pressure, the action of the hydraulic system is further guaranteed to be smooth, the gate is prevented from being out of control, and the safety of gate descending is guaranteed.
In an optional technical scheme, the emergency operation hydraulic system further comprises an oil supplementing one-way valve and an oil supplementing joint, and the oil supplementing joint is communicated with the second pipe joint through the oil supplementing one-way valve. Therefore, the rodless cavity of the hydraulic cylinder can be prevented from forming vacuum in the descending process of the gate, the stability of a hydraulic system is ensured, and the descending operation of the gate is ensured to be smooth.
In an optional technical scheme, the reversing control valve comprises an electric control reversing single valve and a manual reversing single valve which are connected in parallel, namely an oil inlet, an oil return port, a first working oil port and a second working oil port of the electric control reversing single valve are respectively communicated with the oil inlet, the oil return port, the first working oil port and the second working oil port of the manual reversing single valve, and the oil inlet, the oil return port, the first working oil port and the second working oil port of the reversing control valve are formed together. Therefore, the manual or automatic control reversing control valve can be selected according to actual needs, and the device is suitable for diversified control operation.
In an optional technical scheme, the emergency operation hydraulic system further comprises a state switching valve which is connected in series between an oil discharge port of the hydraulic pump and the reversing control valve; in one state, an oil outlet of the hydraulic pump is communicated with an oil inlet of the electric control reversing single valve; in another state, the oil discharge port of the hydraulic pump is communicated with the oil inlet of the manual reversing single valve. Therefore, the manual or automatic control reversing control valve can be selected according to actual needs, and the device is suitable for diversified control operation.
In an optional technical scheme, the bidirectional flow regulating electric control valve comprises two unidirectional flow speed regulating sub-valves which are connected in series; the two one-way flow speed regulation sub-valves are opposite in conduction direction. In a preferred scheme, the one-way flow speed regulation sub-valve comprises a speed regulation valve block and a one-way valve block which are connected in parallel; and the conduction directions of the one-way valve blocks of the two one-way flow speed regulating sub-valves are opposite.
In the preferred technical scheme, an electric control on-off valve is connected in series between a first oil port and a second oil port of the bidirectional flow regulating electric control valve; and the signal output end of the synchronous controller is in signal connection with the electric control end of the electric control on-off valve. The hydraulic cylinder can be quickly supplied through automatic control through the electric control on-off valve, and the synchronous control efficiency of the hydraulic cylinder is improved.
The utility model provides a hydraulic hoist, including a plurality of hydraulic power component, hydraulic power component one end links to each other with the gate to the drive gate goes up and down, still includes any kind of above-mentioned emergency operation hydraulic system. Due to the emergency operation hydraulic system, the hydraulic hoist also has corresponding technical effects.
Drawings
Fig. 1 is a schematic view of a hydraulic principle of an emergency operation hydraulic system according to a first embodiment of the present invention;
FIG. 2 is a schematic diagram of another bi-directional flow regulating electrically controlled valve;
fig. 3 is a schematic view of a hydraulic principle of an emergency operation hydraulic system provided by the second embodiment of the present invention;
fig. 4 is the control logic structure diagram of the control module part of the emergency operation hydraulic system provided by the utility model.
Detailed Description
The embodiments provided by the present invention are described below with reference to the accompanying drawings. In the following description, the related on-off valve may be a proportional valve to gradually adjust the hydraulic flow to ensure the working stability of the hydraulic system, and is not described one by one.
Please refer to fig. 1, which is a schematic diagram of a hydraulic principle of an emergency operation hydraulic system according to an embodiment of the present invention. The emergency operation hydraulic system is used for a hydraulic hoist comprising a plurality of hydraulic cylinders. In an emergency situation, the emergency operation hydraulic system can be combined with the plurality of hydraulic cylinders to control the plurality of hydraulic cylinders to perform corresponding actions. Of course, the structure of the gate system and the arrangement of a proper number of hydraulic cylinders can be matched with the hoisting hoist for use.
Of course, a hydraulic motor can be used as a hydraulic power element to drive a winch or other transmission mechanism to open and close. This embodiment only takes the pneumatic cylinder as the example to the utility model discloses the technical scheme who creates the providing carries out the concrete description.
The embodiment of the utility model provides an in, emergency operation hydraulic system includes two-way flow control automatically controlled valve 11, hydraulic pump 3.1, stroke detection sensor and synchronous controller.
The two-way flow regulating electric control valve 11 has two working oil ports: a first oil port A and a second oil port B; the hydraulic oil can flow through the first oil port A to the second oil port B, and similarly, the hydraulic oil can also flow through the second oil port B to the first oil port A; and the through-flow between the two working oil ports can be adjusted in an electric control mode. The number of the two-way flow regulating electric control valves 11 can be the same as that of the hydraulic cylinders, and the two-way flow regulating electric control valves correspond to the hydraulic cylinders at least one by one so as to respectively regulate the flow of the hydraulic oil entering the corresponding hydraulic cylinders or flowing back from the hydraulic cylinders.
The stroke detection sensor is used for detecting the stroke of each hydraulic cylinder, namely detecting the expansion and contraction amount of the hydraulic cylinder. The stroke detection sensor may utilize an existing detection device such as a stroke switch, a position detector, a light reflection detection device, an ultrasonic detection, a pull-wire encoder, a resistance gauge, a cylinder stroke detector, and the like. In the case where the hydraulic power element is a hydraulic motor, the stroke detection sensor may indirectly obtain the stroke detection data by detecting the rotational speed and the rotational direction of the plurality of hydraulic motors and by time or other parameters, or may determine the stroke detection data by detecting the number of revolutions of the hydraulic motor or the hoist according to the device parameters. The stroke detection sensor may utilize an existing detection device such as an encoder, a rotation speed sensor, a steering sensor, a stroke switch, a light reflection detection device, and the like.
The synchronous controller can be realized by adopting a corresponding singlechip or chip, can also be realized by corresponding software, and can also be realized by combining software and hardware.
The hydraulic pump 3.1 provides hydraulic power for the overall hydraulic system. The oil suction opening of the oil pump is connected with a connector 14.1 (preferably a quick connector) through a pipeline, and the connector 14.1 can be communicated with an oil tank. An oil discharge port of the hydraulic pump 3.1 is communicated with first oil ports A of the bidirectional flow regulating electric control valves 11; a second port B of the bidirectional flow-rate-adjusting electronic control valve 11 is connected to a first pipe joint 18 (the hydraulic cylinder is used as a hydraulic power element, and the corresponding working port is communicated with the first hydraulic cavity) for communicating with a first hydraulic cavity (in this embodiment, a rod cavity) corresponding to the hydraulic cylinder. The first pipe connection 18 is preferably a quick connection to be quickly connected to the rod chamber of the corresponding hydraulic cylinder.
The stroke detection sensor and the synchronous controller belong to a control module part. The synchronization controller may be provided with a plurality of electrical ports for accessing signals or outputting corresponding signals. A plurality of stroke detection sensors are in signal communication with the signal input of the synchronization controller for providing a detected data signal input to the synchronization controller. The synchronous controller is simultaneously provided with a plurality of signal output ends, and each signal output end is in signal connection with an electric control end of a bidirectional flow regulating electric control valve 11. The synchronous controller can control the through-flow of the bidirectional flow regulating electric control valve 11 by a preset strategy according to the detection signal of the stroke detection sensor, so that each hydraulic cylinder can synchronously extend and retract.
The control strategy of the synchronous controller can be selected according to actual needs; for example, the strokes of a plurality of hydraulic cylinders can be compared, if the difference between the stroke of a certain hydraulic cylinder and the average stroke of other hydraulic cylinders exceeds a preset value, the stretching speed of the hydraulic cylinder can be actively adjusted, and the through-flow of the bidirectional flow adjusting electric control valve 11 is adjusted by outputting an electric control signal to the bidirectional flow adjusting electric control valve 11 corresponding to the hydraulic cylinder, so that the stretching speed of the corresponding hydraulic cylinder is adjusted; a preset speed threshold value can be set, and when the difference between the telescopic speed of the hydraulic cylinder and the preset speed threshold value exceeds a preset range, the telescopic speed of the corresponding hydraulic cylinder is actively adjusted. And so on.
As shown in the figure, the present embodiment further includes a power source internal combustion engine set 1.1, an elastic transmission module 2.1, and corresponding hydraulic oil pipelines, etc. An output shaft of the internal combustion engine unit 1.1 is in transmission connection with an input shaft of the hydraulic cylinder 3.1 through the elastic transmission module 2.1 so as to drive the hydraulic cylinder 3.1 to work and enable an oil discharge port of the hydraulic pump 3.1 to discharge high-pressure oil. Of course, a safety valve 5.1 is arranged between the oil discharge port and the hydraulic oil return circuit, and the working pressure of the whole hydraulic system is regulated by the overflow pressure of the safety valve 5.1. The return oil circuit is terminated with a coupling 14.3, preferably a quick coupling, for easy connection to the oil tank.
Meanwhile, in order to ensure the normal work of the hydraulic pump 3.1, a pump oil drainage pipeline communicated with an oil drainage port of the hydraulic pump 3.1 is further arranged, and a connector 14.2, preferably a quick connector, is arranged at the tail end of the pump oil drainage pipeline so as to be conveniently connected with an oil tank. In this embodiment, in order to ensure smooth oil return and oil drainage of the hydraulic system, the oil drainage pipeline and the oil return pipeline may be communicated with each other.
By utilizing the emergency operation hydraulic system, during emergency operation, the first pipe joint 18 can be utilized to be communicated with the rod cavity of the hydraulic cylinder, and then a plurality of hydraulic cylinders with proper quantity can be simultaneously operated, and the plurality of hydraulic cylinders are utilized to drive the gate to carry out corresponding operation. If high-pressure oil enters the rod cavity of the hydraulic cylinder, the hydraulic cylinder can be contracted, and the gate can be lifted. Meanwhile, stroke data of each hydraulic cylinder can be collected through a stroke detection sensor for detecting the stroke of the hydraulic cylinder, and the through-flow of the bidirectional flow regulating electric control valve 11 is controlled by a synchronous controller according to the detected stroke data, so that the stroke of each hydraulic cylinder is adjusted, the plurality of hydraulic cylinders are guaranteed to stretch out and draw back basically synchronously, and the requirement for opening or closing a large gate is met.
By utilizing the emergency operation hydraulic system, the hydraulic cylinders with the proper quantity can be matched according to actual needs, the stroke detection sensor data with the corresponding quantity can be acquired, the hydraulic cylinders with the corresponding quantity can be controlled, the hydraulic system does not need to be additionally constructed, the characteristic that the power range of the hydraulic power system is large is fully utilized, the cost of the emergency operation hydraulic system can be reduced, and the economy of the emergency operation hydraulic system is ensured.
By using the embodiment shown in fig. 1, in the opposite situation, when the gate is required to descend, the hydraulic oil in the rod cavity can flow back through the two-way flow regulating electric control valve 11 by using the gravity of the gate, so that the hydraulic cylinder extends, and the extension speed of the hydraulic cylinder is controlled by throttling through the two-way flow regulating electric control valve 11, so that the gate descends stably.
It will be understood by those skilled in the art that the hydraulic cylinder may be a single acting cylinder (which extends by gravity or spring force when extended) or may be a rodless chamber of the hydraulic cylinder connected to the tank by suitable piping to draw hydraulic fluid into the cylinder or return hydraulic fluid from the rodless chamber when extended or retracted.
In this embodiment, the specific implementation manner of the bidirectional flow-rate adjusting electronic control valve 11 may be configured according to actual needs. In this embodiment, the bidirectional flow regulating electric control valve 11 includes two unidirectional flow speed regulating sub-valves 11.1 and 11.2 connected in series; the one-way flow speed regulation sub-valve 11.1 comprises a speed regulation valve block and a one-way valve block which are connected in parallel, and the conduction directions of the two one-way valve blocks of the one-way flow speed regulation sub-valve 11.1 are opposite. When high-pressure oil flows to a rod cavity of the hydraulic cylinder, a speed regulating valve block of the one-way flow speed regulating sub-valve 11.1 plays a throttling role, and the one-way valve block connected with the one-way flow speed regulating sub-valve in parallel is cut off in a reverse direction; high-pressure oil enters the one-way flow speed regulating sub-valve 11.2 after passing through the speed regulating valve block of the one-way flow speed regulating sub-valve 11.1, the one-way valve block of the one-way flow speed regulating sub-valve 11.2 is conducted in the positive direction, and the high-pressure oil enters the rod cavity through the joint 18. On the contrary, when the hydraulic oil in the rod cavity flows back, the speed regulating valve block of the one-way flow speed regulating sub-valve 11.2 plays a throttling role to ensure that the hydraulic cylinder extends stably and the one-way valve block connected in parallel with the hydraulic cylinder is stopped reversely; the backflow hydraulic oil enters the one-way flow speed regulating sub-valve 11.1 after passing through the speed regulating valve block of the one-way flow speed regulating sub-valve 11.2, the one-way valve block of the one-way flow speed regulating sub-valve 11.1 is conducted in the forward direction, and the backflow hydraulic oil flows back to the oil tank through the safety valve 5.1. It can be understood that the backflow hydraulic oil flows back to the oil tank through the safety valve 5.1, so that the rod cavity can keep corresponding pressure, and the stable descending of the gate is further ensured.
In this embodiment, an electrically controlled on-off valve 12.1 is also connected in series between the first oil port a and the second oil port B of the bidirectional flow-regulating electrically controlled valve 11; the signal output end of the synchronous controller is in signal connection with the electric control end of the electric control on-off valve 12.1, namely the bidirectional flow regulating electric control valve 11 also comprises an electric control on-off valve 12.1. As shown in the figure, the electrically controlled on-off valve 12.1 may be an electrically controlled two-position two-way valve, including two oil ports; in one state (up position, with reference to fig. 1), the two ports are open; in another state (in the lower position, with reference to fig. 1), the two oil ports are in conduction. Hydraulic oil can be quickly supplied through automatic control through the electric control on-off valve 12.1, and the synchronous control efficiency of the hydraulic cylinder is improved; at this time, the control strategy of the synchronous controller may be: and when the stretching speed or the stretching stroke of the hydraulic cylinder with the slowest stretching speed or the hydraulic cylinder with the smallest stretching stroke is determined by comparison, the electric control on-off valve 12.1 is controlled to be at the lower position to enable the first oil port A and the second oil port B to be communicated so as to quickly supply high-pressure oil to the corresponding hydraulic cylinder.
According to the above description, those skilled in the art can understand that the speed regulating valve block is an electrically controlled speed regulating valve, the signal output end of the synchronous controller is connected to the electrical control end of each speed regulating valve block by signals, and the purpose of adjusting the extending or retracting speed of the corresponding hydraulic cylinder can be achieved by adjusting the through-flow rate (throttling damping force) of each speed regulating valve block, so as to ensure the synchronous extension and retraction of each hydraulic cylinder.
It can be understood that the bidirectional flow regulating electronic control valve 11 is not limited to the above structure, and may be implemented in other manners, and may include an electronic control valve or a manual valve, and may further be provided with a manual and electronic control dual-mode flow regulating valve, and through-flow is roughly regulated manually, and through-flow is finely regulated electrically; under the condition that at least one electric control mode valve is arranged in the bidirectional flow regulating electric control valve 11, the signal output end of the synchronous controller is in signal connection with the electric control end of the valve, and the regulation of the through flow of the hydraulic oil can be controlled. Referring to fig. 2, a schematic diagram of another bi-directional flow regulating electrically controlled valve is shown. The two-way flow regulating electric control valve 11 comprises two one-way valve blocks 11.21 and 11.22; two electronically controlled speed valve blocks 11.31 and 11.32. The one-way valve block 11.21 and the electric control speed regulating valve block 11.31 are connected in series to form a one-way flow speed regulating sub-valve, and the one-way valve block 11.22 and the electric control speed regulating valve block 11.32 are connected in series to form another one-way flow speed regulating sub-valve. And the two one-way flow speed regulation sub-valves are connected in parallel between the first oil port A and the second oil port B. When high-pressure oil flows to a rod cavity of the hydraulic cylinder, the check valve block 11.21 is conducted in the forward direction, the check valve block 11.22 is cut off in the reverse direction, and the high-pressure oil enters the rod cavity through the joint 18 after passing through the electric control speed regulation valve block 11.31. On the contrary, when the hydraulic oil in the rod cavity flows back, the one-way valve block 11.21 is cut off in the reverse direction, the one-way valve block 11.22 is conducted in the forward direction, and the returned hydraulic oil flows back to the oil tank through the safety valve 5.1 after passing through the electric control speed regulation valve block 11.32.
In order to facilitate the operation and improve the adaptability of the emergency operation hydraulic system, a corresponding reversing control valve can be arranged in an oil path of the hydraulic system. Please refer to fig. 3, which is a schematic diagram of a hydraulic principle of an emergency operation hydraulic system according to an embodiment of the present invention. Compared with the first embodiment, the difference lies in that the reversing control valve is further provided, the reversing control valve 8 comprises an electric control reversing single valve 8.1 and a manual reversing single valve 8.2 which are connected in parallel, and the electric control reversing single valve 8.1 and the manual reversing single valve 8.2 can be integrated on one valve block or fixed together through a proper bracket. An oil inlet P, an oil return port T, a first working oil port A and a second working oil port B of the electric control reversing single valve 8.1 are respectively communicated with an oil inlet P, an oil return port T, a first working oil port A and a second working oil port B of the manual reversing single valve 8.2, and form an oil inlet, an oil return port, a first working oil port and a second working oil port of the reversing control valve 8 together. The two first working oil ports a are communicated with the first oil ports of the bidirectional flow regulating electric control valve 11, and the second working oil port B is connected with a second pipe joint 14.5 for communicating a second hydraulic cavity of the hydraulic cylinder (the hydraulic cylinder is used as a hydraulic power element, and the corresponding working oil ports are communicated with the second hydraulic cavity). In this embodiment, the rodless cavities of the plurality of hydraulic cylinders may be connected in parallel and then connected to the second pipe joint 14.5.
The electric control reversing single valve 8.1 and the manual reversing single valve 8.2 are both three-position four-way valves and have two working states. In a first working state, the oil inlet P and the oil return port T are respectively communicated with a first working oil port A and a second working oil port B; in a second working state, the oil inlet P and the oil return port T of the reversing control valve 8 are respectively communicated with the second working oil port B and the first working oil port a. The middle positions of the electric control reversing single valve 8.1 and the manual reversing single valve 8.2 are both in a stop state, and the high-pressure oil stops supplying oil to the working oil port.
In this embodiment, the emergency operation hydraulic system further comprises a state switching valve 7.1 connected in series between the oil discharge of the hydraulic pump 3.1 and the directional control valve 8. The state conversion valve 7.1 is a two-position three-way valve, an oil inlet and two working oil ports; the two working oil ports are respectively communicated with oil inlets P of the electric control reversing single valve 8.1 and the manual reversing single valve 8.2. In one state, an oil outlet of the hydraulic pump 3.1 is communicated with an oil inlet of the electric control reversing single valve 8.1 through a state conversion valve 7.1; in another state, an oil discharge port of the hydraulic pump 3.1 is communicated with an oil inlet of the manual reversing single valve 8.2 through a state switching valve 7.1. Therefore, the manual or automatic control reversing control valve 8 can be selected according to actual requirements, and the control device is suitable for diversified control operation. In order to prevent the hydraulic pump from being out of control, a one-way valve 6.1 can be arranged between an oil discharge port of the hydraulic pump 3.1 and an oil inlet of the electric control reversing single valve 8.1 to prevent high-pressure oil from flowing backwards. In the present embodiment, the state switching valve 7.1 is a manual and electrically controlled two-mode control valve.
The hydraulic working principle of the embodiment is as follows:
when the hydraulic cylinder contracts to enable the gate to ascend, the high-power internal combustion engine unit 1.1 is started, and hydraulic oil in the oil tank is sucked into the hydraulic pump 3.1 through the express connector 14.1; the hydraulic oil discharged from the oil discharge port of the hydraulic pump 3.1 passes through the check valve 6.1 and then enters the oil inlet and a working oil port of the state conversion valve 7.1; through the state conversion of the state conversion valve 7.1, high-pressure oil can be input into a first oil port A of the bidirectional flow regulating electric control valve 11 through an oil inlet of the electric control reversing single valve 8.1 or the manual reversing single valve 8.2 and a first working oil port A, and then enters a rod cavity of the hydraulic cylinder through a second oil port B of the bidirectional flow regulating electric control valve 11; meanwhile, the hydraulic oil in the rodless cavity of the hydraulic cylinder flows back to the oil tank through the second pipe joint 14.5 and the second working oil port B of the electric control reversing single valve 8 and the oil return port of the reversing control valve 8, so that the piston rod of the hydraulic cylinder retracts to drive the gate to ascend and open. As described above, by adjusting the through-flow rate (i.e., damping force) of the bidirectional flow rate control electronic control valve 11, synchronous extension and retraction of the plurality of hydraulic cylinders can be achieved.
On the contrary, when the hydraulic cylinder extends to enable the gate to descend, the state of the electric control reversing single valve 8.1 or the manual reversing single valve 8.2 is adjusted to be positioned at the right position. High-pressure oil is discharged from an oil outlet of the hydraulic pump 3.1, and enters a state conversion valve 7.1 after passing through a one-way valve 6.1; through the state conversion of the state conversion valve 7.1, high-pressure oil can be input into a rodless cavity of the hydraulic cylinder through an oil inlet of the electric control reversing single valve 8.1 or the manual reversing single valve 8.2 and the second working oil port B; the hydraulic oil in the rod cavity flows back under the action of the hydraulic oil in the rodless cavity or the gravity of the gate, and flows back to the oil tank through the first working oil port A of the two-way flow regulating electric control valve 11, the electric control reversing single valve 8.1 or the manual reversing single valve 8.2 and the oil return port T respectively. In the process, the piston rod of the hydraulic cylinder retracts, the gate descends and the closing action is carried out. As described above, by adjusting the flow rate (i.e., damping force) of the bidirectional flow rate control electronic control valve 11, synchronous extension and retraction of the plurality of hydraulic cylinders can be achieved.
In the above embodiment, the reversing control valve 8 is arranged, so that the hydraulic cylinder can be operated bidirectionally by using hydraulic power, and the adaptability and the initiative of the emergency operation hydraulic system are improved. The electric control reversing single valve 8.1 and the manual reversing single valve 8.2 which are connected in parallel can be supplied by manually controlling hydraulic oil and also can be supplied by electrically controlling the hydraulic oil, so that the adaptability and the initiative of the emergency operation hydraulic system are improved. The electrically controlled directional single valve 8.1 can be in signal connection with the synchronous controller, so as to control the state of the electrically controlled directional single valve 8.1 through the synchronous controller (see fig. 3).
It can be understood that the reversing control valve 8 can be an independent three-position four-way valve, an oil discharge port of the hydraulic pump 3.1 is communicated with an oil inlet of the reversing control valve 8, and an oil return pipeline is communicated with an oil return port of the reversing control valve 8. A first working oil port of the reversing control valve 8 is communicated with a first oil port of the bidirectional flow-regulating electric control valve 11, and a second working oil port is connected with a second pipe joint 14.5 for communicating a second hydraulic cavity (in the embodiment, the second hydraulic cavity is a rodless cavity) of the hydraulic cylinder, namely, the second pipe joint 14.5 can be quickly communicated with another cavity (rodless cavity) of the hydraulic cylinder. The reversing control valve 8 may be an electric control three-position reversing valve, a manual three-position reversing valve, a control valve with electric control and manual control, or other control valves with reversing function.
Referring to fig. 3, the embodiment further includes a control check valve 6.2 and a back pressure on-off valve 5.2; the second working oil port B of the reversing control valve 8 is also connected with a control pipeline joint 14.6 (preferably a quick joint) for communicating a hydraulic lock of the hydraulic cylinder; the second pipe joint 14.5 is communicated with the control pipeline joint 14.6 through the control one-way valve 6.2; the oil inlet and the hydraulic control port of the back pressure on-off valve 5.2 are both communicated with the second working oil port of the reversing control valve 8; the oil outlet of the back pressure on-off valve 5.2 is communicated with the second pipe joint 14.5. The hydraulic lock of the hydraulic cylinder can be a hydraulic control on-off valve, a hydraulic control one-way valve and the like which are communicated with the oil return oil way, and can also be a hydraulic element for locking the hydraulic cylinder.
In this embodiment, the back pressure on-off valve 5.2 is a back pressure control valve, a hydraulic control port of the back pressure on-off valve is communicated with the oil inlet, and when the pressure of the oil inlet reaches a predetermined value, the oil inlet is communicated with a second hydraulic cavity (rodless cavity) of the hydraulic cylinder. At the same time, the hydraulic cylinder is actively unlocked by the control line connection 14.6. Meanwhile, a pressure on-off valve 5.3 is arranged, so that an oil inlet and a hydraulic control port of the pressure on-off valve 5.3 are communicated with an oil outlet of the back pressure on-off valve 5.2 and a second pipe joint 14.5, and an oil outlet of the pressure on-off valve 5.3 is communicated with an oil return pipeline (namely the joint 14.3).
The hydraulic system can avoid the no-pressure action of hydraulic oil in the rodless cavity, and is communicated with the oil outlet only after the proper pressure is built in the rodless cavity of the hydraulic cylinder, so that the cavitation erosion and the air suction of the hydraulic pump and the pipeline are avoided, the smooth action of the hydraulic system is further ensured, the out-of-control of the gate is avoided, and the safety of the gate descending is ensured.
In order to reduce the power consumption of the hydraulic cylinder in extension (gate descending) and fully utilize the kinetic energy generated by the gravity of the gate, in the embodiment, the emergency operation hydraulic system further comprises an oil supplementing one-way valve 6.3 and an oil supplementing joint 14.4 (preferably a quick joint), and the oil supplementing joint 14.4 is communicated with the second pipe joint 14.5 through the oil supplementing one-way valve 6.3. Therefore, the rodless cavity of the hydraulic cylinder can be prevented from forming vacuum in the descending process of the gate, the stability of a hydraulic system is ensured, and the descending operation of the gate is ensured to be smooth; the gravity of the gate can be used for actively sucking oil from the hydraulic tank.
The working principle of the hydraulic system is described above, and the above embodiment may further include a control module portion. Please refer to fig. 4, which is a control logic structure diagram of a control module portion of the emergency hydraulic system according to the present invention. The emergency operation hydraulic system can also be provided with a corresponding electric energy storage device, such as a storage battery, so as to ensure the start of the emergency operation hydraulic system and provide the supply of electric quantity for the control element; meanwhile, a charging device can be arranged to charge the storage battery through an external power supply in daily life; a generator may also be provided in driving connection with the engine to generate electrical energy for use by the electrical components or to charge the battery when the engine is operating. Meanwhile, a pressure gauge can be arranged at a corresponding position of the emergency operation hydraulic system to detect system pressure and corresponding pipeline pressure, and a system pressure signal is transmitted to the synchronous controller. Of course, besides the stroke detection sensor, the electric control reversing valve (single valve) and the two-way flow regulation electric control valve, the system can also collect gate opening and closing signals, engine state signals, fuel residual signals, control electric residual signals and the like, generate engine starting control signals and the like according to a preset strategy, and perform preset adjustment or operation on the engine and the corresponding electric control valve. The charging device and the storage battery can provide electric energy for the synchronous controller, the stroke sensor and the engine control module, and meanwhile, the external power supply and the engine are also electrically connected with the charging device and the storage battery for charging. In addition, the related data can be displayed through a display screen.
Based on above-mentioned emergency operation hydraulic system, the utility model discloses still provide a hydraulic hoist machine, including a plurality of pneumatic cylinders, pneumatic cylinder one end links to each other with the hoist frame, and the other end links to each other with the gate, still includes any kind of above-mentioned emergency operation hydraulic system. The above-mentioned tubing joint (preferably a quick coupling) of the emergency operation hydraulic system is in communication with the hydraulic cylinder. Due to the emergency operation hydraulic system, the hydraulic hoist also has corresponding technical effects, and the details are not repeated herein.
It is right above the utility model provides an emergency operation hydraulic system and including this emergency operation hydraulic system's hydraulic hoist have carried out detailed introduction. The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the core concepts of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the invention, several improvements and modifications can be made to the invention, and these improvements and modifications also fall into the protection scope of the claims of the present invention.
Claims (11)
1. An emergency operation hydraulic system is used for a hydraulic hoist comprising a plurality of hydraulic power elements and is characterized by comprising a bidirectional flow regulating electric control valve (11) corresponding to the plurality of hydraulic power elements one by one, a hydraulic pump (3.1), a plurality of stroke detection sensors for detecting strokes of the hydraulic power elements and a synchronous controller;
an oil discharge port of the hydraulic pump (3.1) is communicated with a first oil port of the bidirectional flow regulating electric control valve (11); a second oil port of the bidirectional flow regulating electric control valve (11) is connected with a first pipe joint (18) used for communicating a first working oil port corresponding to the hydraulic power element;
the stroke detection sensors are respectively connected with the signal input end of the synchronous controller through signals; and the signal output end of the synchronous controller is respectively in signal connection with the electric control ends of the bidirectional flow regulating electric control valves (11), and the through flow of the bidirectional flow regulating electric control valves (11) is controlled by a preset strategy according to the detection signal of the stroke detection sensor, so that all hydraulic power elements synchronously operate.
2. The emergency operation hydraulic system according to claim 1, further comprising a directional control valve (8);
an oil discharge port of the hydraulic pump (3.1) is communicated with an oil inlet of the reversing control valve (8), and an oil return pipeline is communicated with an oil return port of the reversing control valve (8); a first working oil port (A) of the reversing control valve (8) is communicated with a first oil port of the bidirectional flow regulating electric control valve (11), and a second working oil port (B) is connected with a second pipe joint (14.5) for communicating a second working oil port of the hydraulic power element;
in a first working state, an oil inlet (P) and an oil return port (T) of the reversing control valve (8) are respectively communicated with a first working oil port (A) and a second working oil port (B); and in a second working state, the oil inlet (P) and the oil return port (T) of the reversing control valve (8) are respectively communicated with the second working oil port (B) and the first working oil port (A).
3. The emergency operation hydraulic system of claim 2, wherein the hydraulic power element is a hydraulic cylinder; the hydraulic power element comprises a hydraulic cylinder, a first working oil port and a second working oil port, wherein the first working oil port and the second working oil port of the hydraulic power element are respectively communicated with a rod cavity and a rodless cavity of the hydraulic cylinder, the first pipe joint (18) is a rod cavity joint, and the second pipe joint (14.5) is a rodless cavity joint.
4. Emergency operation hydraulic system according to claim 3, characterised by further comprising a control non return valve (6.2) and a back pressure on-off valve (5.2); a second working oil port of the reversing control valve (8) is also connected with a control pipeline joint (14.6) for communicating a hydraulic lock of the hydraulic cylinder;
the second pipe joint (14.5) is communicated with the control pipeline joint (14.6) through the control one-way valve (6.2);
the oil inlet and the hydraulic control port of the back pressure on-off valve (5.2) are communicated with the second working oil port of the reversing control valve (8); the oil outlet of the back pressure on-off valve (5.2) is communicated with the second pipe joint (14.5);
an oil inlet and a hydraulic control port of the pressure on-off valve (5.3) are communicated with an oil outlet of the back pressure on-off valve (5.2) and the second pipe joint (14.5); the oil outlet of the pressure on-off valve (5.3) is communicated with an oil return pipeline.
5. Emergency operation hydraulic system according to claim 3, characterised in that it further comprises an oil-supplementing non-return valve (6.3) and an oil-supplementing connection (14.4), the oil-supplementing connection (14.4) communicating with the second pipe connection (14.5) through the oil-supplementing non-return valve (6.3).
6. Emergency operation hydraulic system according to any of claims 2-5, characterized in that the directional control valve (8) comprises an electrically controlled directional single valve (8.1) and a manually directional single valve (8.2) in parallel.
7. Emergency operation hydraulic system according to claim 6, characterized by further comprising a state changeover valve (7.1) connected in series between the oil discharge of the hydraulic pump (3.1) and the directional control valve (8); in one state, an oil outlet of the hydraulic pump (3.1) is communicated with an oil inlet of the electric control reversing single valve (8.1); in another state, an oil discharge port of the hydraulic pump (3.1) is communicated with an oil inlet of the manual reversing single valve (8.2).
8. Emergency operation hydraulic system according to any of claims 1-5, characterised in that the bi-directional flow-regulating electrically controlled valve (11) comprises two unidirectional flow-regulating sub-valves (11.1, 11.2) in series; the two one-way flow speed regulation sub-valves (11.1, 11.2) are opposite in conduction direction.
9. Emergency operation hydraulic system according to claim 8, characterised in that the one-way flow rate governing sub-valve (11.1, 11.2) comprises a governing valve block and a one-way valve block in parallel; the conduction directions of the one-way valve blocks of the two one-way flow speed regulation sub-valves (11.1, 11.2) are opposite.
10. The emergency operation hydraulic system according to claim 8, characterized in that an electrically controlled on-off valve (12.1) is further connected in series between the first oil port and the second oil port of the bidirectional flow-regulating electrically controlled valve (11); and the signal output end of the synchronous controller is in signal connection with the electric control end of the electric control on-off valve (12.1).
11. A hydraulic hoist, comprising a plurality of hydraulic power components, wherein one end of each hydraulic power component is connected with a gate so as to drive the gate to lift, and further comprising an emergency operation hydraulic system, wherein the emergency operation hydraulic system is the emergency operation hydraulic system according to any one of claims 1 to 10.
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| CN202021363833.1U CN212297081U (en) | 2020-07-13 | 2020-07-13 | Emergency operation hydraulic system and hydraulic hoist |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023116387A1 (en) * | 2021-12-23 | 2023-06-29 | 三一汽车制造有限公司 | Emergency apparatus for operation machinery, and fire-fighting truck |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023116387A1 (en) * | 2021-12-23 | 2023-06-29 | 三一汽车制造有限公司 | Emergency apparatus for operation machinery, and fire-fighting truck |
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