A hydraulic control system for steel drum flanging, rolling and bulging

Abstract

The application provides a hydraulic control system with steel drum flanging, rolling wave and bulging process, which comprises an oil supply unit, a valve control unit group and an execution unit group. The valve control unit group comprises five valve control units with the same structure, and each valve control unit comprises a proportional pressure reducing valve and a multi-way valve assembly. The execution unit group comprises a steel drum fixing execution unit, a steel drum flanging execution unit, a working mechanism rotating execution unit, a steel drum rolling wave execution unit and a steel drum bulging execution unit. The steel drum fixing execution unit comprises a hydraulic cylinder group A and a hydraulic cylinder group B, the steel drum flanging execution unit comprises a hydraulic cylinder A and a hydraulic cylinder B, the working mechanism rotating execution unit comprises a hydraulic motor A and a hydraulic motor B, the steel drum rolling wave execution unit comprises a hydraulic cylinder group C and a hydraulic cylinder group D, and the steel drum bulging execution unit comprises a hydraulic cylinder group E and a hydraulic cylinder group F. The application can complete a single process and three processes jointly. Meanwhile, load sensing regulation is adopted to meet the multifunctional requirements of energy saving and precise control.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydraulic transmission and control, and particularly relates to a hydraulic control system with steel drum flanging, corrugating and rib expanding processes. BACKGROUND

[0002] A common steel drum manufacturing process includes steel plate shearing, steel plate edge grinding, steel plate roll forming, steel drum spot welding, steel drum seam welding, steel drum flanging, steel drum rolling corrugation and steel drum rib expanding. With the proposal of environmental protection, safety, energy saving and emission reduction policies, the production and manufacturing of steel drums in China is moving towards a new direction and is also facing new challenges. It is predicted that in the future, machines in the steel drum manufacturing process need to develop towards intelligentization, systematization and cleanization.

[0003] At present, common steel drum manufacturing process equipment is mostly mechanical transmission structure or hydraulic transmission structure that can only complete a single process. In the transmission structure of the flanging, rolling corrugation and rib expanding processes in the prior art disclosed steel drum manufacturing process, although a hydraulic control system with a large power-to-weight ratio is used, the traditional hydraulic control system using a quantitative pump + electromagnetic valve still has problems such as large overflow loss and serious pipeline heating. At the same time, the existing hydraulic control system can only complete a single process in the steel drum manufacturing process, thereby lengthening the time of the steel drum manufacturing process, and safety hazards are likely to occur when the steel drum is moved multiple times, which cannot meet the needs of national safety and energy saving and emission reduction policies, thereby restricting the development needs of systematization and cleanization of the steel drum manufacturing process. Therefore, it is necessary to invent a new type of hydraulic control system for steel drum manufacturing process to help the intelligentization, systematization and energy saving of the steel drum manufacturing process in China. SUMMARY

[0004] In view of the deficiencies in the prior art, the present application provides a hydraulic control system with steel drum flanging, corrugating and rib expanding processes, which can realize the three working requirements of angle flanging, rolling corrugation and rib expanding in the drum manufacturing process.

[0005] The present application achieves the above technical objectives through the following technical means.

[0006] A hydraulic control system with steel drum flanging, rolling corrugation and rib expanding processes, comprising: a manual overflow valve, a hydraulic control overflow valve, an oil supply unit, a valve control unit group and an execution unit group;

[0007] The oil supply unit comprises: an oil tank, a load-sensitive pump and a pilot oil pump;

[0008] The valve control unit group includes five structurally identical valve control units, namely a first valve control unit, a second valve control unit, a third valve control unit, a fourth valve control unit and a fifth valve control unit, the execution unit group includes five execution units, the valve control unit corresponds to the execution unit one by one, and the five execution units are respectively: a steel drum fixing execution unit, a steel drum flanging execution unit, a working mechanism rotating execution unit, a steel drum rolling wave execution unit and a steel drum bulging execution unit, the steel drum fixing execution unit includes hydraulic cylinder group A and hydraulic cylinder group B, the steel drum flanging execution unit includes hydraulic cylinder A and hydraulic cylinder B, the working mechanism rotating execution unit includes hydraulic motor A and hydraulic motor B, the steel drum rolling wave execution unit includes hydraulic cylinder group C and hydraulic cylinder group D, and the steel drum bulging execution unit includes hydraulic cylinder group E and hydraulic cylinder group F.

[0009] The first valve control unit includes proportional pressure reducing valve A, proportional pressure reducing valve B and multi-way valve assembly A; the outlet of the load sensing pump is connected with the inlet of the manual overflow valve, the inlet of the hydraulic control overflow valve and the P port of the multi-way valve assembly A; the A port of the multi-way valve assembly A is connected with the left oil ports of the hydraulic cylinder group A and the hydraulic cylinder group B; the B port of the multi-way valve assembly A is connected with the right oil ports of the hydraulic cylinder group A and the hydraulic cylinder group B, and the oil return T port of the multi-way valve assembly A is connected with the inlet of the cooler;

[0010] The inlets of the proportional pressure reducing valve A and the proportional pressure reducing valve B are connected with the outlet of the pilot oil pump, the inlet of the pilot oil pump is connected with the oil tank, the outlet of the proportional pressure reducing valve A is connected with the b port of the multi-way valve assembly A, and the outlet of the proportional pressure reducing valve B is connected with the a port of the multi-way valve assembly A.

[0011] Further, the oil supply unit further includes a motor and a shaft coupling, and the motor drives the load sensing pump and the pilot oil pump to operate through the shaft coupling.

[0012] Further, the oil supply unit further includes a pilot proportional overflow valve, the outlet of the pilot oil pump is connected with the inlet of the pilot proportional overflow valve, and the outlet of the pilot proportional overflow valve is connected with the oil tank.

[0013] Further, the oil supply unit further includes oil suction filters A and B, the inlet of the load sensing pump is connected with the oil tank through the oil suction filter A, and the inlet of the pilot oil pump is connected with the oil tank through the oil suction filter B.

[0014] Further, the oil supply unit further comprises a cooler and an oil return filter, the outlet of the manual overflow valve, the outlet of the hydraulic control overflow valve and the oil return T port of the multi-way valve assembly A are connected to the inlet of the cooler, the outlet of the cooler is connected to the inlet of the oil return filter, and the outlet of the oil return filter is connected to the oil tank.

[0015] Further, the oil supply unit further comprises a liquid level and temperature gauge, which is installed inside the oil tank.

[0016] Further, the second valve control unit comprises a proportional pressure reducing valve C, a proportional pressure reducing valve D and a multi-way valve assembly B.

[0017] The inlet of the proportional pressure reducing valve C and the inlet of the proportional pressure reducing valve D are connected to the outlet of the pilot oil pump, the outlet of the proportional pressure reducing valve C is connected to the b port of the multi-way valve assembly B, the outlet of the proportional pressure reducing valve D is connected to the a port of the multi-way valve assembly B, the P port of the multi-way valve assembly B is connected to the outlet of the load sensing pump, the A port of the multi-way valve assembly B is connected to the left oil port of the hydraulic cylinder A and the hydraulic cylinder B, the B port of the multi-way valve assembly B is connected to the right oil port of the hydraulic cylinder A and the hydraulic cylinder B, and the oil return T port of the multi-way valve assembly B is connected to the inlet of the cooler.

[0018] Further, the third valve control unit comprises a proportional pressure reducing valve E, a proportional pressure reducing valve F and a multi-way valve assembly C.

[0019] The inlet of the proportional pressure reducing valve E and the inlet of the proportional pressure reducing valve F are connected to the inlet and outlet of the pilot oil pump, the outlet of the proportional pressure reducing valve E is connected to the b port of the multi-way valve assembly C, the outlet of the proportional pressure reducing valve F is connected to the a port of the multi-way valve assembly C, the P port of the multi-way valve assembly C is connected to the outlet of the load sensing pump, the A port of the multi-way valve assembly C is connected to the left oil port of the hydraulic motor A and the hydraulic motor B, the B port of the multi-way valve assembly C is connected to the right oil port of the hydraulic motor A and the hydraulic motor B, and the oil return T port of the multi-way valve assembly C is connected to the inlet of the cooler.

[0020] Further, the fourth valve control unit comprises a proportional pressure reducing valve G, a proportional pressure reducing valve H and a multi-way valve assembly D.

[0021] The inlet of the proportional pressure reducing valve G and the inlet of the proportional pressure reducing valve H are connected with the outlet of the pilot pump, the outlet of the proportional pressure reducing valve G is connected with the b port of the multi-way valve assembly D, the outlet of the proportional pressure reducing valve H is connected with the a port of the multi-way valve assembly D; the P port of the multi-way valve assembly D is connected with the outlet of the load sensing pump, the A port of the multi-way valve assembly D is connected with the left oil port of the hydraulic cylinder group C and the hydraulic cylinder group D; the B port of the multi-way valve assembly D is connected with the right oil port of the hydraulic cylinder group C and the hydraulic cylinder group D, and the oil return T port of the multi-way valve assembly D is connected with the inlet of the cooler.

[0022] Further, the fifth valve control unit comprises a proportional pressure reducing valve I, a proportional pressure reducing valve J and a multi-way valve assembly E.

[0023] The inlet of the proportional pressure reducing valve I and the inlet of the proportional pressure reducing valve J are connected with the outlet of the pilot pump, the outlet of the proportional pressure reducing valve I is connected with the b port of the multi-way valve assembly E; the outlet of the proportional pressure reducing valve J is connected with the a port of the multi-way valve assembly E; the P port of the multi-way valve assembly E is connected with the outlet of the load sensing pump, the A port of the multi-way valve assembly E is connected with the left oil port of the hydraulic cylinder group E and the hydraulic cylinder group F; the B port of the multi-way valve assembly E is connected with the right oil port of the hydraulic cylinder group E and the hydraulic cylinder group F, and the oil return T port of the multi-way valve assembly E is connected with the inlet of the cooler.

[0024] The beneficial effects of the present application are as follows:

[0025] The hydraulic control system of the present application adopts a load sensing pump and a load sensing multi-way valve, can sense the pressure-flow demand in the system, and thus can provide only the flow and pressure required by the load.

[0026] The present application adopts a proportional valve to control the multi-way valve, and thus can precisely control the operation of the execution element, thereby effectively improving the control precision of the system on the execution element, and significantly improving the success rate of the steel drum manufacturing process.

[0027] The three processes of the folding and flanging, the rolling and corrugating and the expanding and reinforcing in the present application can work independently or in combination, thereby realizing the multifunctional control demand of a set of system capable of completing multiple processes, and improving the intelligentization and systematization of the hydraulic control system. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 The hydraulic control system principle diagram according to the embodiment of the present application is shown in the figure.

[0029] Figure 2A structure diagram of a multi-way valve assembly according to an embodiment of the present application;

[0030] Figure 3 A layout diagram of an actuator according to an embodiment of the present application;

[0031] Figure 4 A layout diagram of a hydraulic cylinder for performing a process of removing burrs and stretch marks according to an embodiment of the present application.

[0032] Reference numerals:

[0033] 1 - oil tank; 2 - motor; 3 - coupling; 4 - suction filter A; 5 - load sensitive pump; 6 - suction filter B; 7 - pilot pump; 8 - pilot proportional relief valve; 9 - liquid level and temperature gauge; 10 - cooler; 11 - return filter; 12 - manual relief valve; 13 - hydraulic control relief valve; 14 - proportional pressure reducing valve A; 15 - proportional pressure reducing valve B; 16 - multi-way valve assembly A; 17 - proportional pressure reducing valve C; 18 - proportional pressure reducing valve D; 19 - multi-way valve assembly B; 20 - proportional pressure reducing valve E; 21 - proportional relief valve F; 22 - multi-way valve assembly C; 23 - proportional pressure reducing valve G; 24 - proportional pressure reducing valve H; 25 - multi-way valve assembly D; 26 - proportional pressure reducing valve I; 27 - proportional pressure reducing valve J; 28 - multi-way valve assembly E; 29 - hydraulic cylinder group A; 30 - hydraulic cylinder group B; 31 - hydraulic cylinder A; 32 - hydraulic cylinder B; 33 - hydraulic motor A; 34 - hydraulic motor B; 35 - hydraulic cylinder group C; 36 - hydraulic cylinder group D; 37 - hydraulic cylinder group E; 38 - hydraulic cylinder group F; 39 - pressure compensator; 40 - shuttle valve; 41 - shuttle valve; 42 - throttle valve A; 43 - throttle valve B; 44 - relief valve A; 45 - relief valve B. DETAILED DESCRIPTION

[0034] Embodiments of the present application are described in detail below with reference to the attached drawings, which show by way of example, embodiments in which like numerals indicate like elements or elements having the same or similar function. The embodiments described below are exemplary and are intended to be illustrative of the present application and are not to be construed as limiting the present application.

[0035] In the description of the present application, it is to be understood by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "axial", "radial", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can be explicitly or implicitly included one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0036] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0037] First, a hydraulic control system for steel drum flanging, rolling and expanding process according to an embodiment of the present application will be described in detail below with reference to the accompanying drawings.

[0038] Referring to Figures 1 to 4 A hydraulic control system for steel drum flanging, rolling and expanding process according to an embodiment of the present application comprises a manual overflow valve 12, a hydraulic control overflow valve 13, an oil supply unit, a valve control unit group and an execution unit group.

[0039] Specifically, the oil supply unit comprises an oil tank 1, a motor 2, a shaft coupling 3, an oil suction filter A 4, an oil suction filter B 6, a load sensing pump 5, a pilot oil pump 7, a pilot proportional overflow valve 8, a cooler 10 and an oil return filter 11. The load sensing pump 5 and the pilot oil pump 7 are connected to the motor 2 through the shaft coupling 3, and the motor 2 drives the load sensing pump 5 and the pilot oil pump 7 to operate. The outlet of the pilot oil pump 7 is connected to the inlet of the pilot proportional overflow valve 8, and the outlet of the pilot proportional overflow valve 8 is connected to the oil tank 1. The inlet of the load sensing pump 5 is connected to the oil tank 1 through the oil suction filter A 4, and the inlet of the pilot oil pump 7 is connected to the oil tank 1 through the oil suction filter B 6.

[0040] The execution unit group includes five execution units, with a one-to-one correspondence between the valve control unit and the execution unit. The five execution units are: steel drum fixing execution unit, steel drum flanging execution unit, working mechanism rotation execution unit, steel drum corrugated execution unit, and steel drum rib expansion execution unit. The steel drum fixing execution unit includes hydraulic cylinder group A29 and hydraulic cylinder group B30, the steel drum flanging execution unit includes hydraulic cylinder A31 and hydraulic cylinder B32, the working mechanism rotation execution unit includes hydraulic motor A33 and hydraulic motor B34, the steel drum corrugated execution unit includes hydraulic cylinder group C35 and hydraulic cylinder group D36, and the steel drum rib expansion execution unit includes hydraulic cylinder group E37 and hydraulic cylinder group F38.

[0041] The valve control unit group comprises five structurally identical valve control units: the first valve control unit, the second valve control unit, the third valve control unit, the fourth valve control unit, and the fifth valve control unit. The first to fifth valve control units correspond one-to-one with the steel drum fixing actuator, the steel drum flanging actuator, the working mechanism rotation actuator, the steel drum corrugating actuator, and the steel drum expansion rib actuator, respectively. The first valve control unit includes proportional pressure reducing valves A14 and B15, and a multi-way valve assembly A16; the second valve control unit includes proportional pressure reducing valves C17 and D18, and a multi-way valve assembly B19; the third valve control unit includes proportional pressure reducing valves E20 and F21, and a multi-way valve assembly C22; the fourth valve control unit includes proportional pressure reducing valves G23 and H24, and a multi-way valve assembly D25; and the fifth valve control unit includes proportional pressure reducing valves I26 and J27, and a multi-way valve assembly E28.

[0042] As attached Figure 2 As shown, multi-way valve assemblies A16, B19, C22, D25, and E28 have the same structure. They all consist of a pressure compensation valve 39, a directional valve 40, a shuttle valve 41, a throttle valve A42, a throttle valve B43, a relief valve A44, and a relief valve B45. The P port of pressure compensation valve 39 is connected to the outlet of load-sensitive pump 5; the outlet of pressure compensation valve 39 is connected to the inlet of directional valve 40; the A and B working ports of directional valve 40 are connected to the actuator; the MA and MB pressure feedback ports of directional valve 40 are connected to the pressure inlet of shuttle valve 41, while the MA port of directional valve 40 is connected to the inlet of throttle valve A42, and the MB port of directional valve 40 is connected to the inlet of throttle valve B43; the outlet of throttle valve A42 is connected to the inlet of relief valve A44; the outlet of throttle valve B43 is connected to the inlet of relief valve B45; in addition, the a port of directional valve 40 is connected to the outlet of proportional pressure reducing valve, and the b port of directional valve 40 is connected to the outlet of proportional pressure reducing valve; the outlet M of shuttle valve 41 is connected to the receiving end of load-sensitive pump 5; the outlets of relief valve A44 and relief valve B45 are both connected to the return T port of their corresponding multi-way valve assembly, and further connected to oil tank 1.

[0043] As attached Figure 1 As shown, the outlet of the load-sensitive pump 5 is connected to the inlet of the manual relief valve 12, the inlet of the hydraulic relief valve 13, the P port of the multi-way valve assembly A16, the P port of the multi-way valve assembly B19, the P port of the multi-way valve assembly C22, the P port of the multi-way valve assembly D25, and the P port of the multi-way valve assembly E28, respectively; the A port of the multi-way valve assembly A16 is connected to the left oil port of the hydraulic cylinder group A29 and the hydraulic cylinder group B30; the right oil port of the hydraulic cylinder group A29 and the hydraulic cylinder group B30 is connected to the B port of the multi-way valve assembly A16; the A port of the multi-way valve assembly B19 is connected to the left oil port of the hydraulic cylinder A31 and the hydraulic cylinder B32; the right oil port of the hydraulic cylinder A31 and the hydraulic cylinder B32 is connected to the multi-way valve assembly E28. The B port of multi-way valve assembly B19 is connected; the A port of multi-way valve assembly C22 is connected to the left oil port of hydraulic motors A33 and B34; the right oil port of hydraulic motors A33 and B34 is connected to the B port of multi-way valve assembly C22; the A port of multi-way valve assembly D25 is connected to the left oil port of hydraulic cylinder group C35 and D36; the right oil port of hydraulic cylinder group C35 and D36 is connected to the B port of multi-way valve assembly D25; the A port of multi-way valve assembly E28 is connected to the left oil port of hydraulic cylinder group E37 and F38; the right oil port of hydraulic cylinder group E37 and F38 is connected to the B port of multi-way valve assembly E28. The outlets of the manual relief valve 12, the hydraulic relief valve 13, the return T-ports of multi-way valve assembly A16, B19, C22, D25, and E28 are all connected to the inlet of the cooler 10; the outlet of the cooler 10 is connected to the inlet of the return oil filter 11; and the outlet of the return oil filter 11 is connected to the oil tank 1. The shuttle valves in multi-way valve assemblies A16, B19, C22, D25, and E28 all feed back the outlet pressure to the pressure receiving end of the load-sensitive pump 5.

[0044] As attached Figure 1As shown, the inlet of the pilot oil pump 7 is connected with the oil tank 1 through the oil suction filter B6; the outlet of the pilot oil pump 7 is connected with the inlet of the pilot proportional overflow valve 8, the inlet of the proportional pressure reducing valve A14, the inlet of the proportional pressure reducing valve B15, the inlet of the proportional pressure reducing valve C17, the inlet of the proportional pressure reducing valve D18, the inlet of the proportional pressure reducing valve E20, the inlet of the proportional pressure reducing valve F21, the inlet of the proportional pressure reducing valve G23, the inlet of the proportional pressure reducing valve H24, the inlet of the proportional pressure reducing valve I26 and the inlet of the proportional pressure reducing valve J27; the outlet of the pilot proportional overflow valve 8 is connected with the oil tank 1; the outlet of the proportional pressure reducing valve A14 is connected with the b port of the multi-way valve assembly A16; the outlet of the proportional pressure reducing valve B15 is connected with the a port of the multi-way valve assembly A16; the outlet of the proportional pressure reducing valve C17 is connected with the b port of the multi-way valve assembly B19; the outlet of the proportional pressure reducing valve D18 is connected with the a port of the multi-way valve assembly B19; the outlet of the proportional pressure reducing valve E20 is connected with the b port of the multi-way valve assembly C22; the outlet of the proportional pressure reducing valve F21 is connected with the a port of the multi-way valve assembly C22; the outlet of the proportional pressure reducing valve G23 is connected with the b port of the multi-way valve assembly D25; the outlet of the proportional pressure reducing valve H24 is connected with the a port of the multi-way valve assembly D25; the outlet of the proportional pressure reducing valve I26 is connected with the b port of the multi-way valve assembly E28; the outlet of the proportional pressure reducing valve J27 is connected with the a port of the multi-way valve assembly E28; the oil return ports of the proportional pressure reducing valve A14, the proportional pressure reducing valve B15, the proportional pressure reducing valve C17, the proportional pressure reducing valve D18, the proportional pressure reducing valve E20, the proportional pressure reducing valve F21, the proportional pressure reducing valve G23, the proportional pressure reducing valve H24, the proportional pressure reducing valve I26 and the proportional pressure reducing valve J27 are all connected with the inlet of the cooler 10; the outlet of the cooler 10 is connected with the inlet of the oil return filter 11; the outlet of the oil return filter 11 is connected with the oil tank 1.

[0045] The hydraulic control system with the steel drum flanging, corrugating and ribbing processes can complete the three working requirements of the traditional drum making process, i.e. the corner flanging, the rolling corrugating and the ribbing.

[0046] System starting: the motor 2 is started, and then drives the load sensing pump 5 and the pilot oil pump 7 to operate, at this time, the directional valve in the multi-way valve assembly A16, the directional valve in the multi-way valve assembly B19, the directional valve in the multi-way valve assembly C22, the directional valve in the multi-way valve assembly D25 and the directional valve in the multi-way valve assembly E28 are all not started, the hydraulic oil discharged from the load sensing pump 5 flows back to the oil tank 1 after unloading through the manual overflow valve 12 and the hydraulic control overflow valve 13; the control oil discharged from the pilot oil pump 7 flows back to the oil tank 1 after unloading through the pilot proportional overflow valve 8.

[0047] Longitudinal fixing process of steel drum: The control oil output from pilot oil pump 7 is regulated by proportional pressure reducing valve A14, which controls the directional valve in multi-way valve assembly A16 to switch direction and operate in the lower position. At this time, the high-pressure oil discharged from load-sensitive pump 5 flows into port P of pressure compensation valve in multi-way valve assembly A16, and further flows into inlet of directional valve in multi-way valve assembly A16, and then flows into rodless chamber of hydraulic cylinder group A29 and hydraulic cylinder group B30 through port A of directional valve in multi-way valve assembly A16; the hydraulic oil in rod chamber of hydraulic cylinder group A29 and hydraulic cylinder group B30 flows back to oil tank 1 through port B of directional valve in multi-way valve assembly A16 and through port T. At this time, as shown in the attached... Figure 3 and 4 As shown, the expansion ribs on both sides extend synchronously with the piston rods of the eight hydraulic cylinders corresponding to the inner ring hydraulic cylinder groups A29 and B30 in the corrugated working mechanism, thereby fixing the steel barrel longitudinally. After all the work is completed, the control oil output by the pilot oil pump 7 is regulated by the proportional pressure reducing valve B15 and controls the reversing valve in the multi-way valve assembly A16 to switch directions and operate in the upper position. At this time, the high-pressure oil discharged by the load-sensitive pump 5 flows into the P port of the pressure compensation valve in the multi-way valve assembly A16, and further flows into the oil inlet of the reversing valve in the multi-way valve assembly A16, and then flows into the rod chamber of the hydraulic cylinder group A29 and the hydraulic cylinder group B30 through the B port of the reversing valve in the multi-way valve assembly A16; the hydraulic oil in the rodless chamber of the hydraulic cylinder group A29 and the hydraulic cylinder group B30 flows back to the oil tank 1 through the A port of the reversing valve in the multi-way valve assembly A16. At this time, as shown in the attached... Figure 3 , 4 As shown, the expansion ribs on the left and right sides retract synchronously with the eight hydraulic cylinder piston rods corresponding to the inner ring hydraulic cylinder group A29 and hydraulic cylinder group B30 in the corrugated working mechanism, thereby loosening the steel drum longitudinally for easy loading and unloading.

[0048] Steel drum flanging process: With the steel drum longitudinally fixed, the control oil output from the pilot oil pump 7 is regulated by the proportional pressure reducing valve C17, which controls the directional valve in the multi-way valve assembly B19 to switch directions and operate in the lower position. At this time, the high-pressure oil discharged from the load-sensitive pump 5 flows into the P port of the pressure compensation valve in the multi-way valve assembly B19, and further flows into the oil inlet of the directional valve in the multi-way valve assembly B19. Subsequently, it flows into the rodless chambers of hydraulic cylinders A31 and B32 through the A port of the directional valve in the multi-way valve assembly B19. The hydraulic oil in the rod chambers of hydraulic cylinders A31 and B32 flows back to the oil tank 1 through the B port of the directional valve in the multi-way valve assembly B19 and the T port. At this time, as shown in the attached... Figure 3As shown, the hydraulic cylinder A31 and hydraulic cylinder B32 on both sides of the bottom drive the two left and right flanging blocks to move synchronously to the middle, thereby completing the flanging work of the steel drum, and can artificially adjust the angle of the flanging, and fix the steel drum in the transverse direction. When all the work is completed, the control oil output by the pilot oil pump 7 is adjusted by the proportional pressure reducing valve D18, controls the reversing valve in the multi-way valve assembly B19 to reverse, and is in the upper position work. At this time, the high-pressure oil discharged by the load-sensitive pump 5 flows into the P port of the pressure compensation valve in the multi-way valve assembly B19, and further flows into the oil inlet of the reversing valve in the multi-way valve assembly B19, then flows into the rod cavity of the hydraulic cylinder A31 and hydraulic cylinder B32 through the B port of the reversing valve in the multi-way valve assembly B19; the hydraulic oil in the rodless cavity of the hydraulic cylinder A31 and hydraulic cylinder B32 flows through the A port of the reversing valve in the multi-way valve assembly B19, and flows back to the tank 1 from the T port. At this time, as shown in the figure, Figure 3 As shown, the hydraulic cylinder A31 and hydraulic cylinder B32 on both sides of the bottom drive the two left and right flanging blocks to move synchronously to the middle, thereby completing the flanging work of the steel drum, and can artificially adjust the angle of the flanging, and fix the steel drum in the transverse direction. When all the work is completed, the control oil output by the pilot oil pump 7 is adjusted by the proportional pressure reducing valve D18, controls the reversing valve in the multi-way valve assembly B19 to reverse, and is in the upper position work. At this time, the high-pressure oil discharged by the load-sensitive pump 5 flows into the P port of the pressure compensation valve in the multi-way valve assembly B19, and further flows into the oil inlet of the reversing valve in the multi-way valve assembly B19, then flows into the rod cavity of the hydraulic cylinder A31 and hydraulic cylinder B32 through the B port of the reversing valve in the multi-way valve assembly B19; the hydraulic oil in the rodless cavity of the hydraulic cylinder A31 and hydraulic cylinder B32 flows through the A port of the reversing valve in the multi-way valve assembly B19, and flows back to the tank 1 from the T port. At this time, as shown in the figure,

[0049] Steel drum rolling work procedure: under the premise of fixing the steel drum in the transverse direction, the control oil output by the pilot oil pump 7 is adjusted by the proportional pressure reducing valve E20, controls the reversing valve in the multi-way valve assembly C22 to reverse, and is in the lower position work. At this time, the high-pressure oil discharged by the load-sensitive pump 5 flows into the P port of the pressure compensation valve in the multi-way valve assembly C22, and further flows into the oil inlet of the reversing valve in the multi-way valve assembly C22, then flows into the left oil port of the hydraulic motor A33 and hydraulic motor B34 through the A port of the reversing valve in the multi-way valve assembly C22; the hydraulic oil output by the right oil port of the hydraulic motor A33 and hydraulic motor B34 flows through the B port of the reversing valve in the multi-way valve assembly C22, and flows back to the tank 1 from the T port. It should be noted that when the motor needs to work in reverse, only the proportional pressure reducing valve F21 needs to be adjusted. At this time, as shown in the figure, Figure 3 As shown, the hydraulic motor A33 and hydraulic motor B34 on both sides drive the bulging and corrugating mechanism to rotate synchronously in the same direction. At the same time, the control oil output by the pilot oil pump 7 is adjusted by the proportional pressure reducing valve G23, controls the reversing valve in the multi-way valve assembly D25 to reverse, and is in the lower position work. At this time, the high-pressure oil discharged by the load-sensitive pump 5 flows into the P port of the pressure compensation valve in the multi-way valve assembly D25, and further flows into the oil inlet of the reversing valve in the multi-way valve assembly D25, then flows into the rodless cavity of the hydraulic cylinder group C35 and hydraulic cylinder group D36 through the A port of the reversing valve in the multi-way valve assembly D25; the hydraulic oil in the rod cavity of the hydraulic cylinder group C35 and hydraulic cylinder group D36 flows through the B port of the reversing valve in the multi-way valve assembly D25, and flows back to the tank 1 from the T port. At this time, as shown in the figure, Figure 3 and 4As shown, the left and right sides of the bulging ribs and corrugated work mechanism in the outer ring hydraulic cylinder group C35 and hydraulic cylinder group D36 corresponding four hydraulic cylinder piston rod synchronous extension, and then drive the wave structure to extend, and then complete the steel drum wave work. When the wave work is completed, the control oil output by the pilot pump 7 is adjusted by the proportional pressure reducing valve H24, and the reversing valve in the multi-way valve assembly D25 is controlled to reverse and work in the upper position. At this time, the high-pressure oil discharged by the load-sensitive pump 5 flows into the P port of the pressure compensation valve in the multi-way valve assembly D25, and further flows into the oil inlet of the reversing valve in the multi-way valve assembly D25, and then flows into the rod cavity of the hydraulic cylinder group C35 and the hydraulic cylinder group D36 through the B port of the reversing valve in the multi-way valve assembly D25. The hydraulic oil in the rodless cavity of the hydraulic cylinder group C35 and the hydraulic cylinder group D36 flows through the A port of the reversing valve in the multi-way valve assembly D25, and flows back to the tank 1 from the T port. At this time, as shown in the figure Figure 3 and 4 As shown, the left and right sides of the bulging ribs and corrugated work mechanism in the outer ring hydraulic cylinder group C35 and hydraulic cylinder group D36 corresponding four hydraulic cylinder piston rod synchronous extension, and then drive the wave structure to extend, and then complete the steel drum wave work. When the wave work is completed, the control oil output by the pilot pump 7 is adjusted by the proportional pressure reducing valve H24, and the reversing valve in the multi-way valve assembly D25 is controlled to reverse and work in the upper position. At this time, the high-pressure oil discharged by the load-sensitive pump 5 flows into the P port of the pressure compensation valve in the multi-way valve assembly D25, and further flows into the oil inlet of the reversing valve in the multi-way valve assembly D25, and then flows into the rod cavity of the hydraulic cylinder group C35 and the hydraulic cylinder group D36 through the B port of the reversing valve in the multi-way valve assembly D25. The hydraulic oil in the rodless cavity of the hydraulic cylinder group C35 and the hydraulic cylinder group D36 flows through the A port of the reversing valve in the multi-way valve assembly D25, and flows back to the tank 1 from the T port. At this time, as shown in the figure

[0050] Steel drum bulging process: under the premise of fixing the steel drum horizontally, the control oil output by the pilot pump 7 is adjusted by the proportional pressure reducing valve E20, and the reversing valve in the multi-way valve assembly C22 is controlled to reverse and work in the lower position. At this time, the high-pressure oil discharged by the load-sensitive pump 5 flows into the P port of the pressure compensation valve in the multi-way valve assembly C22, and further flows into the oil inlet of the reversing valve in the multi-way valve assembly C22, and then flows into the left oil port of the hydraulic motor A33 and the hydraulic motor B34 through the A port of the reversing valve in the multi-way valve assembly C22; the hydraulic oil output by the right oil port of the hydraulic motor A33 and the hydraulic motor B34 flows through the B port of the reversing valve in the multi-way valve assembly C22, and flows back to the tank 1 from the T port. It should be noted that when the motor needs to be reversed, only the proportional pressure reducing valve F21 needs to be adjusted. At this time, as shown in the figure Figure 3 As shown, the left and right sides of the hydraulic motor drive the bulging ribs and corrugated work mechanism to start synchronous rotation. At the same time, the control oil output by the pilot pump 7 is adjusted by the proportional pressure reducing valve I26, and the reversing valve in the multi-way valve assembly E28 is controlled to reverse and work in the lower position. At this time, the high-pressure oil discharged by the load-sensitive pump 5 flows into the P port of the pressure compensation valve in the multi-way valve assembly E28, and further flows into the oil inlet of the reversing valve in the multi-way valve assembly E28, and then flows into the rodless cavity of the hydraulic cylinder group E37 and the hydraulic cylinder group F38 through the A port of the reversing valve in the multi-way valve assembly E28; the hydraulic oil in the rod cavity of the hydraulic cylinder E37 and the hydraulic cylinder F38 flows through the B port of the reversing valve in the multi-way valve assembly E28, and flows back to the tank 1 from the T port. At this time, as shown in the figure Figure 3 and4 As shown in Fig. 6, the left and right sides of the stretchers are synchronously extended with the corresponding four hydraulic cylinder piston rods in hydraulic cylinder group E37 and hydraulic cylinder group F38 in the outer ring of the corrugation working mechanism, thereby driving the stretcher mechanical structure to extend, and completing the steel drum stretcher reinforcing work. After the stretcher reinforcing work is completed, the control oil output by the pilot oil pump 7 is adjusted by the proportional pressure reducing valve J27, the reversing valve in the multi-way valve assembly E28 is controlled to reverse, and is in the upper position work. At this time, the high-pressure oil discharged by the load sensing pump 5 flows into the P port of the pressure compensation valve in the multi-way valve assembly E28, and further flows into the oil inlet of the reversing valve in the multi-way valve assembly E28, and then flows into the rod cavity of the hydraulic cylinder group E37 and the hydraulic cylinder group F38 through the B port of the reversing valve in the multi-way valve assembly E28. The hydraulic oil in the rodless cavity of the hydraulic cylinder group E37 and the hydraulic cylinder group F38 flows through the A port of the reversing valve in the multi-way valve assembly E28, and flows back to the oil tank 1 from the T port. At this time, as shown in Fig. 7, the left and right sides of the stretchers are synchronously retracted with the corresponding four hydraulic cylinder piston rods in hydraulic cylinder group E37 and hydraulic cylinder group F38 in the outer ring of the corrugation working mechanism, thereby driving the stretcher mechanical structure to retract, and ending the stretcher reinforcing work. At the same time, by adjusting the proportional pressure reducing valve E20 and the proportional pressure reducing valve F21, the reversing valve in the multi-way valve assembly C22 is closed, thereby stopping the rotation of the hydraulic motor A31 and the hydraulic motor B32. Figure 3 and 4 As shown in Fig. 6, the left and right sides of the stretchers are synchronously extended with the corresponding four hydraulic cylinder piston rods in hydraulic cylinder group E37 and hydraulic cylinder group F38 in the outer ring of the corrugation working mechanism, thereby driving the stretcher mechanical structure to extend, and completing the steel drum stretcher reinforcing work. After the stretcher reinforcing work is completed, the control oil output by the pilot oil pump 7 is adjusted by the proportional pressure reducing valve J27, the reversing valve in the multi-way valve assembly E28 is controlled to reverse, and is in the upper position work. At this time, the high-pressure oil discharged by the load sensing pump 5 flows into the P port of the pressure compensation valve in the multi-way valve assembly E28, and further flows into the oil inlet of the reversing valve in the multi-way valve assembly E28, and then flows into the rod cavity of the hydraulic cylinder group E37 and the hydraulic cylinder group F38 through the B port of the reversing valve in the multi-way valve assembly E28. The hydraulic oil in the rodless cavity of the hydraulic cylinder group E37 and the hydraulic cylinder group F38 flows through the A port of the reversing valve in the multi-way valve assembly E28, and flows back to the oil tank 1 from the T port. At this time, as shown in Fig. 7, the left and right sides of the stretchers are synchronously retracted with the corresponding four hydraulic cylinder piston rods in hydraulic cylinder group E37 and hydraulic cylinder group F38 in the outer ring of the corrugation working mechanism, thereby driving the stretcher mechanical structure to retract, and ending the stretcher reinforcing work. At the same time, by adjusting the proportional pressure reducing valve E20 and the proportional pressure reducing valve F21, the reversing valve in the multi-way valve assembly C22 is closed, thereby stopping the rotation of the hydraulic motor A31 and the hydraulic motor B32.

[0051] In all the above processes, the shuttle valves in the multi-way valve assemblies feedback the load pressure to the receiving end of the load sensing pump 5, thereby adjusting the pressure and flow rate output by the load sensing pump 5, and further matching the load demand, thereby reducing the overflow loss and having higher energy saving efficiency. Moreover, by means of the load sensing technology, the load pressure change can be sensed, and overload protection can be effectively realized.

[0052] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are contained in at least one embodiment or example of the present application. In this specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0053] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application without departing from the principles and spirits of the present application.

Claims

1. A hydraulic control system that integrates the processes of steel drum flanging, corrugating, and rib expansion, characterized in that, include: Manual relief valve (12), hydraulic relief valve (13), oil supply unit, valve control unit group and actuator group; The oil supply unit includes: an oil tank (1), a load-sensitive pump (5), and a pilot oil pump (7); The valve control unit group includes five valve control units with the same structure, namely the first valve control unit, the second valve control unit, the third valve control unit, the fourth valve control unit and the fifth valve control unit. The execution unit group includes five execution units. The valve control units correspond one-to-one with the execution units. The five execution units are: steel drum fixing execution unit, steel drum flanging execution unit, working mechanism rotation execution unit, steel drum corrugated execution unit and steel drum rib expansion execution unit. The steel drum fixing execution unit includes hydraulic cylinder group A (29) and hydraulic cylinder group B (30). The steel drum flanging execution unit includes hydraulic cylinder A (31) and hydraulic cylinder B (32). The working mechanism rotation execution unit includes hydraulic motor A (33) and hydraulic motor B (34). The steel drum corrugated execution unit includes hydraulic cylinder group C (35) and hydraulic cylinder group D (36). The steel drum rib expansion execution unit includes hydraulic cylinder group E (37) and hydraulic cylinder group F (38). The first valve control unit includes a proportional pressure reducing valve A (14), a proportional pressure reducing valve B (15), and a multi-way valve assembly A (16); the outlet of the load-sensitive pump (5) is connected to the inlet of the manual relief valve (12), the inlet of the hydraulic relief valve (13), and the P port of the multi-way valve assembly A (16); the A port of the multi-way valve assembly A (16) is connected to the left oil port of the hydraulic cylinder group A (29) and the hydraulic cylinder group B (30); the B port of the multi-way valve assembly A (16) is connected to the right oil port of the hydraulic cylinder group A (29) and the hydraulic cylinder group B (30); and the return oil T port of the multi-way valve assembly A (16) is connected to the inlet of the cooler (10). The inlet of the proportional pressure reducing valve A (14) and the inlet of the proportional pressure reducing valve B (15) are connected to the outlet of the pilot oil pump (7). The inlet of the pilot oil pump (7) is connected to the oil tank (1). The outlet of the proportional pressure reducing valve A (14) is connected to port b of the multi-way valve assembly A (16). The outlet of the proportional pressure reducing valve B (15) is connected to port a of the multi-way valve assembly A (16).

2. The hydraulic control system for the combined processes of steel drum flanging, corrugating, and rib expansion as described in claim 1, is characterized in that, The oil supply unit also includes a motor (2) and a coupling (3), wherein the motor (2) drives the load-sensitive pump (5) and the pilot oil pump (7) to operate through the coupling (3).

3. The hydraulic control system for the combined processes of steel drum flanging, corrugating, and rib expansion as described in claim 1, is characterized in that, The oil supply unit also includes a pilot-operated proportional relief valve (8), the outlet of the pilot oil pump (7) is connected to the inlet of the pilot-operated proportional relief valve (8), and the outlet of the pilot-operated proportional relief valve (8) is connected to the oil tank (1).

4. The hydraulic control system for the combined processes of steel drum flanging, corrugating, and rib expansion as described in claim 1, characterized in that, The oil supply unit also includes an oil suction filter A (4) and an oil suction filter B (6). The inlet of the load-sensitive pump (5) is connected to the oil tank (1) through the oil suction filter A (4), and the inlet of the pilot oil pump (7) is connected to the oil tank (1) through the oil suction filter B (6).

5. The hydraulic control system for the combined processes of steel drum flanging, corrugating, and rib expansion as described in claim 1, characterized in that, The oil supply unit also includes a cooler (10) and a return oil filter (11). The outlet of the manual overflow valve (12), the outlet of the hydraulic overflow valve (13), and the return oil T port of the multi-way valve assembly A (16) are all connected to the inlet of the cooler (10). The outlet of the cooler (10) is connected to the inlet of the return oil filter (11), and the outlet of the return oil filter (11) is connected to the oil tank (1).

6. The hydraulic control system for the combined processes of steel drum flanging, corrugating, and rib expansion as described in claim 5, is characterized in that, The oil supply unit also includes a liquid level and temperature gauge (9), which is installed inside the oil tank (1).

7. The hydraulic control system for the combined processes of steel drum flanging, corrugating, and rib expansion as described in claim 5, is characterized in that, The second valve control unit includes a proportional pressure reducing valve C (17), a proportional pressure reducing valve D (18), and a multi-way valve assembly B (19); The inlet of the proportional pressure reducing valve C (17) and the inlet of the proportional pressure reducing valve D (18) are connected to the outlet of the pilot oil pump (7). The outlet of the proportional pressure reducing valve C (17) is connected to port b of the multi-way valve assembly B (19). The outlet of the proportional pressure reducing valve D (18) is connected to port a of the multi-way valve assembly B (19). The port P of the multi-way valve assembly B (19) is connected to the outlet of the load-sensitive pump (5). The port A of the multi-way valve assembly B (19) is connected to the left oil port of the hydraulic cylinder A (31) and the hydraulic cylinder B (32). The port B of the multi-way valve assembly B (19) is connected to the right oil port of the hydraulic cylinder A (31) and the hydraulic cylinder B (32). The return oil port T of the multi-way valve assembly B (19) is connected to the inlet of the cooler (10).

8. The hydraulic control system for the combined processes of steel drum flanging, corrugating, and rib expansion as described in claim 5, is characterized in that, The third valve control unit includes a proportional pressure reducing valve E (20), a proportional pressure reducing valve F (21), and a multi-way valve assembly C (22); the inlet of the proportional pressure reducing valve E (20) and the inlet of the proportional pressure reducing valve F (21) are connected to the outlet of the pilot oil pump (7), the outlet of the proportional pressure reducing valve E (20) is connected to port b of the multi-way valve assembly C (22), and the outlet of the proportional pressure reducing valve F (21) is connected to port a of the multi-way valve assembly C (22). The P port of the multi-way valve assembly C (22) is connected to the outlet of the load-sensitive pump (5), the A port of the multi-way valve assembly C (22) is connected to the left oil port of the hydraulic motor A (33) and the hydraulic motor B (34), the B port of the multi-way valve assembly C (22) is connected to the right oil port of the hydraulic motor A (33) and the hydraulic motor B (34), and the return oil T port of the multi-way valve assembly C (22) is connected to the inlet of the cooler (10).

9. The hydraulic control system for the combined processes of steel drum flanging, corrugating, and rib expansion as described in claim 5, is characterized in that, The fourth valve control unit includes a proportional pressure reducing valve G (23), a proportional pressure reducing valve H (24), and a multi-way valve assembly D (25); the inlet of the proportional pressure reducing valve G (23) and the inlet of the proportional pressure reducing valve H (24) are connected to the outlet of the pilot oil pump (7), the outlet of the proportional pressure reducing valve G (23) is connected to port b of the multi-way valve assembly D (25), and the outlet of the proportional pressure reducing valve H (24) is connected to port a of the multi-way valve assembly D (25). The P port of the multi-way valve assembly D (25) is connected to the outlet of the load-sensitive pump (5), the A port of the multi-way valve assembly D (25) is connected to the left oil port of the hydraulic cylinder group C (35) and the hydraulic cylinder group D (36), the B port of the multi-way valve assembly D (25) is connected to the right oil port of the hydraulic cylinder group C (35) and the hydraulic cylinder group D (36), and the return oil T port of the multi-way valve assembly D (25) is connected to the inlet of the cooler (10).

10. The hydraulic control system for the combined processes of steel drum flanging, corrugating, and rib expansion as described in claim 5, is characterized in that, The fifth valve control unit includes a proportional pressure reducing valve I (26), a proportional pressure reducing valve J (27), and a multi-way valve assembly E (28); the inlet of the proportional pressure reducing valve I (26) and the inlet of the proportional pressure reducing valve J (27) are connected to the outlet of the pilot oil pump (7), the outlet of the proportional pressure reducing valve I (26) is connected to port b of the multi-way valve assembly E (28), and the outlet of the proportional pressure reducing valve J (27) is connected to port a of the multi-way valve assembly E (28). The P port of the multi-way valve assembly E (28) is connected to the outlet of the load-sensitive pump (5), the A port of the multi-way valve assembly E (28) is connected to the left oil port of the hydraulic cylinder group E (37) and the hydraulic cylinder group F (38), the B port of the multi-way valve assembly E (28) is connected to the right oil port of the hydraulic cylinder group E (37) and the hydraulic cylinder group F (38), and the return oil T port of the multi-way valve assembly E (28) is connected to the inlet of the cooler (10).

Images