CN211820157U - Hydraulic synchronous control valve set for cooling bed - Google Patents
Hydraulic synchronous control valve set for cooling bed Download PDFInfo
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- CN211820157U CN211820157U CN202020028126.0U CN202020028126U CN211820157U CN 211820157 U CN211820157 U CN 211820157U CN 202020028126 U CN202020028126 U CN 202020028126U CN 211820157 U CN211820157 U CN 211820157U
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Abstract
The utility model discloses a cold bed hydraulic pressure synchro control valves belongs to hydraulic control technical field, include the utility model discloses a pneumatic cylinder synchro control valves, it is including locating the proportional reversing valve on the valve piece respectively, pressure compensator, stack formula liquid accuse check valve and balanced valve, the pressure oil of pump station output is through pressure compensator to proportional reversing valve P mouth, proportional reversing valve T mouth links to each other with oil return line, directly to the oil tank, a mouth and b mouth are through the pole chamber and the stopper chamber of stack formula liquid accuse check valve and balanced valve to pneumatic cylinder, lift up and descend through proportional reversing valve control pneumatic cylinder, single pneumatic cylinder adopts single valves to control, and can four hydraulic control valves of synchro control use. The utility model discloses a pneumatic cylinder synchro control valves can realize that two pneumatic cylinders of single set of cold bed chain lift device are synchronous, also can realize that two sets of cold bed chains lift four pneumatic cylinders of device synchronous, and synchro control is more accurate.
Description
Technical Field
The utility model belongs to the technical field of hydraulic control, more specifically say, relate to a cold bed hydraulic pressure synchro control valves.
Background
The medium plate cooling bed mechanical equipment is used for naturally cooling a steel plate and reducing the temperature of the steel plate, and is key equipment of a medium plate production line. A wide and thick plate production line of a steel middle plate factory comprises two rolling disc type cooling bed devices which are divided into No. 2 and No. 3 cooling beds, and each cooling bed is provided with an upper lifting chain and a lower lifting chain lifting device. The upper and lower chain lifting devices of each cooling bed are respectively provided with four hydraulic cylinders, the four hydraulic cylinders control two groups of chain lifting devices, and each group of chain lifting devices is controlled by 2 hydraulic cylinders. The upper cooling bed chain lifting device is responsible for moving the steel plate from the roller way to the cooling bed, and the lower cooling bed chain lifting device is responsible for moving the steel plate from the cooling bed to the roller way. After the steel plate produced by the rolling mill is straightened, the steel plate is conveyed to a cooling bed area through a roller way, the steel plate is conveyed to the cooling bed through an upper cooling bed chain lifting device to be cooled, and after the steel plate is cooled, the cooled steel plate is moved onto the roller way from the cooling bed through a lower cooling bed chain lifting device to enter a working procedure. Four hydraulic cylinders of the upper and lower cooling bed chain lifting devices control the two groups of chain lifting devices, and in the process of lifting and descending the chain devices, the synchronization of two hydraulic cylinders of each group of lifting devices needs to be ensured, and the synchronization of four hydraulic cylinders of the two groups of lifting devices needs to be ensured. If four pneumatic cylinders are asynchronous, lead to the warp deformation of crossbeam between two pneumatic cylinders of every group chain lifting device, can cause the crossbeam fracture seriously, need adopt the cutting welding mode to handle, the processing time is long, is seriously restricting production. If four pneumatic cylinders are asynchronous, lead to the chain to lift the device uneven, the steel sheet when transmitting on it, can cause the lower fish tail of steel sheet, produce the steel sheet quality accident, influence the steel sheet result of use, can not reach customer's demand.
The structure of the hydraulic control valve group of the existing cooling bed chain lifting device is shown in figure 1, and the hydraulic control valve group mainly comprises a first electromagnetic directional valve 3, a second electromagnetic directional valve 8, a first superposed hydraulic control one-way valve 4, a second superposed hydraulic control one-way valve 9, a first superposed double-one-way throttle valve 5, a second superposed double-one-way throttle valve 10, a first sequence valve 6, a second sequence valve 11, a first rectification speed regulating valve 7, a second rectification speed regulating valve 12, a first hydraulic cylinder 1.1, a second hydraulic cylinder 1.2, a third hydraulic cylinder 2.1 and a fourth hydraulic cylinder 2.2. The two hydraulic cylinders lift a chain lifting device together.
When the hydraulic cylinders of the chain lifting device ascend, the ends a of the first electromagnetic reversing valve 3 and the second electromagnetic reversing valve 8 are electrified, pressure oil passes through the ports P of the first electromagnetic reversing valve 3 and the second electromagnetic reversing valve to the port b, passes through the first superposed hydraulic control one-way valve 4 and the second superposed hydraulic control one-way valve 9, passes through the first superposed double one-way throttle valve 5 and the second superposed double one-way throttle valve 10, passes through the first sequence valve 6 and the second sequence valve 11, passes through the first rectification speed regulating valve 7 and the second rectification speed regulating valve 12, reaches the first hydraulic cylinder 1.1 and the second hydraulic cylinder 1.2, and rises through the plug cavities of the third hydraulic cylinder 2.1 and the fourth hydraulic cylinder 2.2, and the synchronous action of the four hydraulic cylinders is controlled through the first rectification speed regulating valve 7 and the second rectification speed regulating valve 12. When the hydraulic cylinder of the chain lifting device descends, the b ends of the first electromagnetic directional valve 3 and the second electromagnetic directional valve 8 are electrified, pressure oil flows from the P ports of the first electromagnetic directional valve 3 and the second electromagnetic directional valve 8 to the a port, flows through the first superposed hydraulic control one-way valve 4, the second superposed hydraulic control one-way valve 9, the first superposed double one-way throttle valve 5, the second superposed double one-way throttle valve 10, the first sequence valve 6, the second sequence valve 11, the first rectification speed regulating valve 7, the second rectification speed regulating valve 12 and reaches the first hydraulic cylinder 1.1, the second hydraulic cylinder 1.2, the third hydraulic cylinder 2.1 and the fourth hydraulic cylinder 2.2, the hydraulic cylinder descends, and the synchronous action of the four hydraulic cylinders is controlled through the first rectification speed regulating valve 7 and the second rectification speed regulating valve 12.
The first rectification speed regulating valve 7 and the second rectification speed regulating valve 12 are used for controlling the synchronization of the four hydraulic cylinders, the hydraulic control mode is not good, and the rectification speed regulating valves are often required to be adjusted to control the synchronization of the hydraulic cylinders. The synchronous control precision of the control hydraulic cylinder is low, and the complete synchronization of the hydraulic cylinder is difficult to realize. The two hydraulic cylinders are asynchronous, so that the cross beam between the two hydraulic cylinders of each group of chain lifting devices is distorted and deformed, the cross beam is seriously cracked, and the stable operation of equipment is seriously restricted. If four pneumatic cylinders are asynchronous, lead to two sets of chain to lift up the device uneven, when the steel sheet was transmitted on it, can cause the lower fish tail of steel sheet, produce the steel sheet quality accident, influence the steel sheet result of use, can not reach customer's demand.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a cold bed hydraulic pressure synchro-control valves aims at that the solution control pneumatic cylinder synchro-control precision is low, is difficult to realize the synchronous technical problem of pneumatic cylinder.
In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides a cold bed hydraulic pressure synchro control valves, includes:
the valve blocks are four groups and are arranged in parallel;
the proportional reversing valve is arranged on the valve block, the output end of the proportional reversing valve is connected with an oil return pipeline, and the output end of the oil return pipeline is communicated with an oil tank and used for controlling the lifting and descending of the hydraulic cylinder;
the pressure compensator is arranged on the valve block, the input end of the pressure compensator is connected with the pressure oil output end of a pump station, and the output end of the pressure compensator is connected with the input end of the proportional reversing valve;
the hydraulic control one-way valve is arranged on the valve block, the input end of the hydraulic control one-way valve is connected with the output end of the proportional reversing valve, and the output end of the hydraulic control one-way valve is connected with the rod cavity and the plug cavity of the hydraulic cylinder; and
and the balance valve is arranged on the valve block, and the input end of the balance valve is connected with the output end and the output end of the proportional reversing valve and is used for connecting a rod cavity and a plug cavity of the hydraulic cylinder and protecting the hydraulic cylinder.
Furthermore, a sensor is arranged between a base of the hydraulic cylinder and a cross beam of the chain lifting device, the sensor is used for detecting the lifting height of the hydraulic cylinder, and signals detected by the sensor are used for judging and controlling input values of the proportional directional valve and synchronously controlling the hydraulic cylinder to act.
Furthermore, the pressure compensator is arranged on a port P of the proportional reversing valve and used for supplementing hydraulic cylinder return pressure oil to the proportional reversing valve.
Further, the sensor is a position sensor.
Furthermore, the input end of the proportional reversing valve comprises an opening a and an opening b, the opening a and the opening b are respectively provided with a superposition type throttle valve, and the hydraulic control one-way valve is used for enabling the proportional reversing valve to return to a middle position, and the hydraulic cylinder stops.
Further, the hydraulic control check valve is a superposition type hydraulic control check valve.
The utility model provides a cold bed hydraulic pressure synchro-control valves's beneficial effect lies in: compared with the prior art, the utility model discloses a cold bed hydraulic pressure synchro control valves, control the cold bed chain with 4 independent control oil circuit and lift four pneumatic cylinders of device, every pneumatic cylinder next door, the chain lifts installation position sensor between device crossbeam and the pneumatic cylinder base, it lifts up the height to detect the pneumatic cylinder through position sensor, control proportion switching-over valve opening, the accurate adjustment pneumatic cylinder position, it is low to have solved control pneumatic cylinder synchro control precision, be difficult to realize the synchronous technical problem of pneumatic cylinder, can realize that two pneumatic cylinders of single set of cold bed chain lift device are synchronous, also can realize that two sets of cold bed chains lift four pneumatic cylinders of device are synchronous, synchronous control is more accurate.
Drawings
FIG. 1 is a schematic diagram of a hydraulic cylinder control of a conventional cooling bed chain lifting device;
fig. 2 is a schematic diagram of a single hydraulic cylinder control of the cooling bed hydraulic synchronous control valve bank provided in the embodiment of the present invention;
fig. 3 is the embodiment of the utility model provides a whole hydraulic control schematic diagram of cold bed hydraulic pressure synchronous control valves.
In the figure: 1.1, a first group of chain lifting device hydraulic cylinders; 1.2, a first group of chain lifting device hydraulic cylinders;
2.1, a third group of chain lifting device hydraulic cylinder; 2.2, a fourth group of chain lifting device hydraulic cylinders;
13. an accumulator;
14.1, a proportional reversing valve; 14.2, a proportional reversing valve; 14.3, a proportional reversing valve; 14.4, a proportional reversing valve;
15.1, a pressure compensator; 15.2, a pressure compensator; 15.3, a pressure compensator; 15.4, a pressure compensator;
16.1, a superposed hydraulic control one-way valve; 16.2, a superposed hydraulic control one-way valve; 16.3, a superposed hydraulic control one-way valve; 16.4, a superposed hydraulic control one-way valve;
17.1, a balance valve; 17.2, a balance valve; 17.3, a balance valve; 17.4, balance valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 2 and fig. 3, the cooling bed hydraulic synchronous control valve set provided by the present invention will now be described. The cold bed hydraulic synchronous control valve bank comprises a valve block, proportional reversing valves 14.1 (14.2, 14.3 and 14.4), pressure compensators 15.1 (15.2, 15.3 and 15.4), hydraulic control one-way valves 16.1 (16.2, 16.3 and 16.4) and balance valves 17.1 (17.2, 17.3 and 17.4) which are respectively arranged on the valve block; the hydraulic cylinder 1.1 comprises four groups of valve blocks which are arranged in parallel, proportional reversing valves 14.1 (14.2, 14.3 and 14.4) are arranged on the valve blocks, the output ends of the proportional reversing valves 14.1 (14.2, 14.3 and 14.4) are connected with oil return pipelines, and the output ends of the oil return pipelines are communicated with an oil tank and are used for controlling the lifting and descending of the hydraulic cylinders 1.1 (1.2, 1.3 and 1.4); the pressure compensator 15.1 (15.2, 15.3, 15.4) is arranged on the valve block, the input end of the pressure compensator 15.1 (15.2, 15.3, 15.4) is connected with the pressure oil output end of the pump station, and the output end of the pressure compensator 15.1 (15.2, 15.3, 15.4) is connected with the input end of the proportional directional valve 14.1 (14.2, 14.3, 14.4); the hydraulic control one-way valves 16.1 (16.2, 16.3 and 16.4) are arranged on the valve block, the input ends of the hydraulic control one-way valves 16.1 (16.2, 16.3 and 16.4) are connected with the output ends of the proportional reversing valves 14.1 (14.2, 14.3 and 14.4), and the output ends of the hydraulic control one-way valves 16.1 (16.2, 16.3 and 16.4) are used for connecting rod cavities and plug cavities of the hydraulic cylinders 1.1 (1.2, 1.3 and 1.4); the balance valve 17.1 (17.2, 17.3, 17.4) is arranged on the valve block, the input end of the balance valve 17.1 (17.2, 17.3, 17.4) is connected with the output end of the proportional reversing valve, and the output end of the balance valve 17.1 (17.2, 17.3, 17.4) is used for connecting the rod cavity and the plug cavity of the hydraulic cylinder 1.1 (1.2, 1.3, 1.4) and protecting the hydraulic cylinder 1.1 (1.2, 1.3, 1.4). The single hydraulic cylinder 1.1 (1.2, 1.3, 1.4) is controlled by a single valve bank, and the chain lifting device has four hydraulic cylinders 1.1 (1.2, 1.3, 1.4) in total and is controlled by four hydraulic control valve banks. By each hydraulic cylinder 1.1 (1.2, 1.3 and 1.4), a position sensor is arranged between a beam of the chain lifting device and a base of the hydraulic cylinder 1.1 (1.2, 1.3 and 1.4), the lifting height of the hydraulic cylinder is detected by the position sensor, the opening degree of a proportional directional valve 14.1 (14.2, 14.3 and 14.4) is controlled, and the positions of the hydraulic cylinders 1.1 (1.2, 1.3 and 1.4) are accurately adjusted, so that the synchronization of the two hydraulic cylinders 1.1 (1.2, 1.3 and 1.4) of the single-set cooling bed chain lifting device can be realized, the synchronization of the four hydraulic cylinders 1.1 (1.2, 1.3 and 1.4) of the two sets of cooling bed chain lifting devices can also be realized, and the synchronization control is more accurate.
Wherein, fig. 1 is a control schematic diagram of hydraulic cylinders of the existing cooling bed chain lifting device, compared with the prior art, the cooling bed hydraulic synchronous control valve group provided by the utility model uses 4 independent control oil circuits to control four hydraulic cylinders 1.1 (1.2, 1.3, 1.4) of the cooling bed chain lifting device, beside each hydraulic cylinder 1.1 (1.2, 1.3, 1.4), a position sensor is arranged between a cross beam of the chain lifting device and a base of the hydraulic cylinder 1.1 (1.2, 1.3, 1.4), the lifting height of the hydraulic cylinders is detected by the position sensor, the opening degree of the proportional reversing valve 14.1 (14.2, 14.3, 14.4) is controlled, the position of the hydraulic cylinders is accurately adjusted, the technical problem that the synchronous control precision of the hydraulic cylinders is low and the synchronization of the hydraulic cylinders is difficult to realize is solved, the synchronization of two hydraulic cylinders 1.1 (1.2, 1.3, 1.4) of the single set of the cooling bed chain lifting device can be realized, the synchronization of the four hydraulic cylinders 1.1 (1.2, 1.3 and 1.4) of the two sets of cooling bed chain lifting devices can be realized, and the synchronization control is more accurate.
The proportional directional valves 14.1 (14.2, 14.3, 14.4), the pressure compensator 15.1 (15.2, 15.3, 15.4), the pilot-operated check valves 16.1 (16.2, 16.3, 16.4) and the balance valves 17.1 (17.2, 17.3, 17.4) are all fixed on the valve block through bolts.
The utility model provides a modified pneumatic cylinder synchro control valves to guarantee that two pneumatic cylinders 1.1 (1.2, 1.3, 1.4) of single set of cold bed chain lift device are synchronous, also can realize that two sets of cold bed chains lift four pneumatic cylinders 1.1 (1.2, 1.3, 1.4) of device are synchronous, it lifts device pneumatic cylinder 1.1 (1.2, 1.3, 1.4) synchro control precision to promote the chain, reduce equipment failure rate, guarantee going on smoothly of production.
And balance valves 17.1 (17.2, 17.3 and 17.4) are arranged on ports a and ports b of the proportional reversing valves 14.1 (14.2, 14.3 and 14.4) and used for protecting the hydraulic cylinders 1.1 (1.2, 1.3 and 1.4), so that the oil flow speed of plug cavities of the hydraulic cylinders 1.1 (1.2, 1.3 and 1.4) is reduced, and the danger caused by the over-high oil return speed due to load inertia is prevented.
As a specific implementation manner of the cooling bed hydraulic synchronous control valve group provided by the present invention, please refer to fig. 2 to 3, a sensor is disposed between the base of the hydraulic cylinder 1.1 (1.2, 1.3, 1.4) and the cross beam of the chain lifting device, the sensor is used for detecting the lifting height of the hydraulic cylinder 1.1 (1.2, 1.3, 1.4), and the signal detected by the sensor is used for determining and controlling the input value of the proportional directional valve 14.1 (14.2, 14.3, 14.4) and for synchronously controlling the actions of the hydraulic cylinder 1.1 (1.2, 1.3, 1.4).
As a specific implementation manner of the cooling bed hydraulic synchronous control valve group provided by the present invention, please refer to fig. 2 to 3, the pressure compensator 15.1 (15.2, 15.3, 15.4) is disposed on the P port of the proportional directional valve 14.1 (14.2, 14.3, 14.4), and the pressure compensator 15.1 (15.2, 15.3, 15.4) is used for supplementing the hydraulic cylinder 1.1 (1.2, 1.3, 1.4) with the oil return pressure oil to the proportional directional valve 14.1 (14.2, 14.3, 14.4).
As a specific implementation manner of the cooling bed hydraulic synchronous control valve set provided by the present invention, please refer to fig. 2 to 3, the sensor is a position sensor. A position sensor is arranged between a cross beam of the chain lifting device and a base of the hydraulic cylinder 1.1 (1.2, 1.3 and 1.4), the lifting height of the hydraulic cylinder 1.1 (1.2, 1.3 and 1.4) is detected through the position sensor, the opening degree of the proportional directional valve 14.1 (14.2, 14.3 and 14.4) is controlled, and the position of the hydraulic cylinder 1.1 (1.2, 1.3 and 1.4) is accurately adjusted, so that the synchronization of the two hydraulic cylinders 1.1 (1.2, 1.3 and 1.4) of the single-set cooling bed chain lifting device can be realized, the synchronization of the four hydraulic cylinders 1.1 (1.2, 1.3 and 1.4) of the two sets of cooling bed chain lifting devices can also be realized, and the synchronization control is more accurate.
As a specific embodiment of the cooling bed hydraulic synchronous control valve group provided by the present invention, please refer to fig. 2 to 3, the input end of the proportional directional valve 14.1 (14.2, 14.3, 14.4) includes an a port and a b port, the a port and the b port are all provided with a stacked throttle valve, and when the stacked hydraulic control check valve 16.1 (16.2, 16.3, 16.4) is used to return the proportional directional valve 14.1 (14.2, 14.3, 14.4) to the middle position, the hydraulic cylinder 1.1 (1.2, 1.3, 1.4) stops at any position.
As a specific embodiment of the cooling bed hydraulic synchronous control valve set provided by the present invention, please refer to fig. 2 to 3, the hydraulic control check valve 16.1 (16.2, 16.3, 16.4) is a stacked hydraulic control check valve.
Referring to fig. 2, the single hydraulic cylinder 1.1 (1.2, 1.3, 1.4) of the present invention includes a proportional directional valve 14.1 (14.2, 14.3, 14.4), a pressure compensator 15.1 (15.2, 15.3, 15.4), a superimposed pilot-controlled check valve 16.1 (16.2, 16.3, 16.4) and a balance valve 17.1 (17.2, 17.3, 17.4). The 4 hydraulic cylinder control systems form a hydraulic valve group, and the hydraulic valve group comprises proportional reversing valves 14.1, 14.2, 14.3 and 14.4, pressure compensators 15.1, 15.2, 15.3 and 15.4, superposed hydraulic control one-way valves 16.1,16.2, 16.3 and 16.4, balance valves 17.1, 17.2, 17.3 and 17.4 and an energy accumulator 13.
The P ports of the pressure compensator 15.1 (15.2, 15.3 and 15.4) and the proportional directional valve 14.1 (14.2, 14.3 and 14.4) are connected with an oil supply pipeline of a pump station; the T port of the proportional reversing valve 14.1 (14.2, 14.3, 14.4) is connected with an oil return pipeline; the a port of the proportional directional valve 14.1 (14.2, 14.3, 14.4) is connected with the superposition type pilot-controlled one-way valve 16.1 (16.2, 16.3, 16.4) and goes through the balance valve 17.1 (17.2, 17.3, 17.4) to the plug cavity of the hydraulic cylinder 1.1 (1.2, 1.3, 1.4). The b port of the proportional directional valve 14.1 (14.2, 14.3, 14.4) is connected with the superposition type pilot-controlled check valve 16.1 (16.2, 16.3, 16.4) to the rod cavity of the hydraulic cylinder 1.1 (1.2, 1.3, 1.4). The control signals of the proportional directional valves 14.1 (14.2, 14.3, 14.4) are controlled according to position sensors arranged beside the hydraulic cylinders 1.1 (1.2, 1.3, 1.4), so that the accurate position control of the single hydraulic cylinder 1.1 (1.2, 1.3, 1.4) is realized, and the synchronization function of the 4 hydraulic cylinders 1.1 (1.2, 1.3, 1.4) is completed. The proportional directional valves 14.1 (14.2, 14.3, 14.4), the pressure compensator 15.1 (15.2, 15.3, 15.4), the superposition type pilot-controlled check valves 16.1 (16.2, 16.3, 16.4) and the balance valves 17.1 (17.2, 17.3, 17.4) are fixed on the valve block through bolts.
The working process of the utility model is as follows:
the single set of chain lifting device acts as follows:
when the hydraulic cylinders 1.1 and 1.2 ascend, hydraulic oil passes through the P pipe, the pressure compensators 15.1 and 15.2 to the P ports of the proportional reversing valves 14.1 and 14.2, the b ends of the proportional reversing valves 14.1 and 14.2 simultaneously give electric signals, the P ports are communicated with the a ports, the pressure oil passes through the proportional reversing valves 14.1 and 14.2 to the left one-way valves of the superposed hydraulic control one-way valves 15.1 and 15.2 to the balance valves 17.1 and 17.2 to enter the plug cavities of the hydraulic cylinders 1.1 and 1.2, the plungers of the two hydraulic cylinders 1.1 and 1.2 extend out, and the chain lifting device ascends. When the hydraulic cylinders 1.1 and 1.2 reach the set position of the position sensor, the b ends of the proportional reversing valves 14.1 and 14.2 stop giving signals, the proportional reversing valves 14.1 and 14.2 return to the middle position, and the hydraulic cylinders 1.1 and 1.2 stop.
When the hydraulic cylinders 1.1 and 1.2 descend, hydraulic oil passes through the P pipe, the pressure compensators 15.1 and 15.2 to the P ports of the proportional directional valves 14.1 and 14.2, the a ends of the proportional directional valves 14.1 and 14.2 are simultaneously given electric signals, the P ports are communicated with the b ports, the pressure oil passes through the proportional directional valves 14.1 and 14.2 to the right one-way valves of the superposed hydraulic control one-way valves 15.1 and 15.2 to the control cavities of the balance valves 17.1 and 17.2, the balance valves 17.1 and 17.2 are switched to throttling work to control the descending speed of the hydraulic cylinders 1.1 and 1.2, the pressure oil enters the rod cavities of the hydraulic cylinders 1.1 and 1.2, the plungers of the two hydraulic cylinders 1.1 and 1.2 retract, and the chain lifting device descends. When the hydraulic cylinders 1.1 and 1.2 reach the set position of the position sensor, the a ends of the proportional reversing valves 14.1 and 14.2 stop giving signals, the proportional reversing valves 14.1 and 14.2 return to the middle position, and the hydraulic cylinders 1.1 and 1.2 stop.
The action process of the two sets of chain lifting devices is as follows:
when the hydraulic cylinders 1.1, 1.2, 2.1 and 2.2 ascend, hydraulic oil passes through a P pipe, a pressure compensator 15.1, 15.2, 15.3 and 15.4 to a P port of a proportional reversing valve 14.1, 14.2, 14.3 and 14.4, an electric signal is given to a b end of the proportional reversing valve 14.1, 14.2, 14.3 and 14.4 at the same time, the P port is communicated with a port, the pressure oil passes through the proportional reversing valve 14.1, 14.2, 14.3 and 14.4 to a left one-way valve of a superposition type one-way valve 15.1, 15.2, 15.3 and 15.4 to a balance valve 17.1, 17.2, 17.3 and 17.4 to enter a piston cavity of the hydraulic cylinders 1.1, 1.2, 2.1 and 2.2, four hydraulic cylinders extend out, and a chain lifting device ascends. When the hydraulic cylinders reach the set position of the position sensors, the b ends of the proportional reversing valves 14.1, 14.2, 14.3 and 14.4 stop giving signals, the proportional reversing valves 14.1, 14.2, 14.3 and 14.4 return to the neutral position, and the hydraulic cylinders 1.1, 1.2, 2.1 and 2.2 stop.
When the hydraulic cylinders 1.1, 1.2, 2.1 and 2.2 descend, hydraulic oil flows through a P pipe, a pressure compensator 15.1, 15.2, 15.3 and 15.4 to a P port of a proportional reversing valve 14.1, 14.2, 14.3 and 14.4, an a end simultaneously gives an electric signal, the P port is communicated with a b port, the pressure oil flows through the proportional reversing valve 4.1, 14.2, 14.3 and 14.4 to a superposed one-way valve 15.1, 15.2, 15.3 and 15.4 to a control cavity of the balance valve 17.1, 17.2, 17.3 and 17.4, the balance valve 17.1, 17.2, 17.3 and 17.4 is switched to throttling operation, and the hydraulic cylinders 1.1, 1.2, 2.1 and 2.2 descend, and the pressure oil enters a rod lifting device of the hydraulic cylinders 1.1, 1.2, 1.1, 2.1, 1.2 and 2.2. When the hydraulic cylinders 1.1, 1.2, 2.1 and 2.2 reach the set position of the position sensor, the b ends of the proportional directional valves 14.1, 14.2, 14.3 and 14.4 stop giving signals, the proportional directional valves 14.1, 14.2, 14.3 and 14.4 return to the neutral position, and the hydraulic cylinders 1.1, 1.2, 2.1 and 2.2 stop.
The utility model discloses utilize proportional reversing valve 14.1 (14.2, 14.3, 14.4) and fix at the other position sensor of pneumatic cylinder 1.1 (1.2, 1.3, 1.4), realize pneumatic cylinder 1.1 (1.2, 1.3, 1.4) synchro control, control accuracy is high. The valve bank has the advantages of simple structure, convenience in operation and low fault rate, realizes automatic control, can improve the operational reliability of cooling bed equipment, and ensures the stable operation of the equipment.
It should be noted that the above "a port" may also be called "a port", and the above "B port" may also be called "B port" are conventional terms of those skilled in the art, and are general terms. The "()" in the above indicates a relationship of "or" with each other.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (6)
1. Cooling bed hydraulic pressure synchro control valves, its characterized in that includes:
the valve blocks are four groups and are arranged in parallel;
the proportional reversing valve is arranged on the valve block, the output end of the proportional reversing valve is connected with an oil return pipeline, and the output end of the oil return pipeline is communicated with an oil tank and used for controlling the lifting and descending of the hydraulic cylinder;
the pressure compensator is arranged on the valve block, the input end of the pressure compensator is connected with the pressure oil output end of a pump station, and the output end of the pressure compensator is connected with the input end of the proportional reversing valve;
the hydraulic control one-way valve is arranged on the valve block, the input end of the hydraulic control one-way valve is connected with the output end of the proportional reversing valve, and the output end of the hydraulic control one-way valve is connected with the rod cavity and the plug cavity of the hydraulic cylinder; and
and the balance valve is arranged on the valve block, and the input end of the balance valve is connected with the output end and the output end of the proportional reversing valve and is used for connecting a rod cavity and a plug cavity of the hydraulic cylinder and protecting the hydraulic cylinder.
2. The cooling bed hydraulic synchronous control valve group as claimed in claim 1, wherein a sensor is arranged between a base of the hydraulic cylinder and a cross beam of the chain lifting device, the sensor is used for detecting the lifting height of the hydraulic cylinder, and a signal detected by the sensor is used for judging an input value for controlling the proportional directional valve and synchronously controlling the action of the hydraulic cylinder.
3. The cooling bed hydraulic synchronous control valve group as claimed in claim 1, wherein the pressure compensator is arranged on a port P of the proportional reversing valve, and the pressure compensator is used for supplementing hydraulic cylinder return pressure oil to the proportional reversing valve.
4. The cold bed hydraulic synchronizing valve block as claimed in claim 2, wherein the sensor is a position sensor.
5. The cold bed hydraulic synchronous control valve group of claim 1, wherein the input end of the proportional directional control valve comprises an a port and a b port, a superposition type throttle valve is arranged on each of the a port and the b port, and the hydraulic control one-way valve is used for stopping the hydraulic cylinder when the proportional directional control valve returns to a neutral position.
6. The cold bed hydraulic synchronous control valve bank of claim 1, wherein the pilot operated check valve is a stacked pilot operated check valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020028126.0U CN211820157U (en) | 2020-01-07 | 2020-01-07 | Hydraulic synchronous control valve set for cooling bed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020028126.0U CN211820157U (en) | 2020-01-07 | 2020-01-07 | Hydraulic synchronous control valve set for cooling bed |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114291763A (en) * | 2022-01-07 | 2022-04-08 | 江南造船(集团)有限责任公司 | Hydraulic jacking system for large-scale equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114291763A (en) * | 2022-01-07 | 2022-04-08 | 江南造船(集团)有限责任公司 | Hydraulic jacking system for large-scale equipment |
| CN114291763B (en) * | 2022-01-07 | 2023-10-17 | 江南造船(集团)有限责任公司 | Hydraulic jacking system for large-scale equipment |
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