Driving system with double oil cylinders acting in sequence

Abstract

The utility model relates to the technical field of driving systems, in particular to a driving system with double oil cylinders acting sequentially, which comprises a hydraulic oil tank, a metering pump, a first three-position four-way reversing valve, a second three-position four-way reversing valve and a third three-position four-way reversing valve. According to the utility model, when the three-position four-way reversing valve III is arranged at the right position or the left position and the material turning oil cylinder extends out or retracts back, if a piston rod in the material turning oil cylinder moves to the head, the pressure in the material turning oil cylinder rises to exceed the set pressure of the one-way overflow valve group I or the one-way overflow valve group II, and the material turning oil cylinder is turned over. Hydraulic oil can burst through the first one-way overflow valve set or the second one-way overflow valve set through the first linkage one-way valve or the second linkage one-way valve to enter the material pushing oil cylinder, so that the material pushing oil cylinder can take back or stretch out, and the material pushing oil cylinder can also act while the material turning oil cylinder acts; the orderly control of the driving oil cylinders (the material pushing oil cylinder and the material turning oil cylinder) is realized physically, and the complexity of the control system is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to drive system technical field especially relates to a kind of driving systems of double oil cylinder sequential action. BACKGROUND

[0002] Heavy vehicle steering needs hydraulic cylinder drive, to maximum degree reduce the arm driving force of driver, especially in mine haulage vehicle in parking after loading process, there is the chain action of turning material and pushing material into box.

[0003] But the existing driving system when driving pushing material cylinder and turning material cylinder action, only single action cycle operation can be realized, the sequential cycle action of both cannot be realized, that is difficult to realize the chain action of turning material and pushing material system, reduce the work efficiency of haulage vehicle in parking loading process. UTILITY MODEL CONTENT

[0004] Therefore, the utility model provides a kind of driving systems of double oil cylinder sequential action to solve the problems that the existing driving system cannot drive turning material cylinder and pushing material to carry out simultaneous sequential action, cannot realize the sequential cycle action of both, reduce the operating efficiency.

[0005] Based on the above purpose, the utility model provides a kind of driving systems of double oil cylinder sequential action for driving turning material cylinder and pushing material cylinder action, including hydraulic oil tank, constant delivery pump, three-position four-way directional control valve one, three-position four-way directional control valve two and three-position four-way directional control valve three, and three-position four-way directional control valve one, three-position four-way directional control valve two and three-position four-way directional control valve three all have P port, T port, A port and B port, the oil outlet of constant delivery pump is connected with the P port of three-position four-way directional control valve one;

[0006] and the A port of three-position four-way directional control valve one is connected with the P port of three-position four-way directional control valve three, the B port of three-position four-way directional control valve one is connected with the P port of three-position four-way directional control valve two, and the P port and T port of three-position four-way directional control valve two are interconnected, the P port of three-position four-way directional control valve two is connected with hydraulic oil tank, the T port of three-position four-way directional control valve three is connected with the P port of three-position four-way directional control valve two with unidirectional valve two;

[0007] the A port of three-position four-way directional control valve three is connected with the rodless cavity of turning material cylinder with pipeline C, and speed regulating valve group one is arranged on pipeline C, the B port of three-position four-way directional control valve three is connected with the rodless cavity of turning material cylinder with pipeline D, and speed regulating valve group two is arranged on pipeline D, the A port of three-position four-way directional control valve two is connected with the rod cavity of pushing material cylinder with pipeline E, and one-way overflow valve group one is arranged on pipeline E, the B port of three-position four-way directional control valve two is connected with the rodless cavity of pushing material cylinder with one-way overflow valve group two;

[0008] The linkage one-way valve one is connected between the pipeline C and the pipeline E, and the linkage one-way valve two is connected between the pipeline D and the pipeline F, when the three-position four-way directional valve three is in the right position or the left position, in the process of the turning oil cylinder extending or retracting, if the piston rod in the turning oil cylinder is displaced to the head, so that the pressure in the turning oil cylinder rises to exceed the pressure set by the one-way overflow valve group one or the one-way overflow valve group two, the hydraulic oil can flow through the linkage one-way valve one or the linkage one-way valve two to open the one-way overflow valve group one or the one-way overflow valve group two to enter the pushing oil cylinder, so that the pushing oil cylinder can retract or extend, to realize that the pushing oil cylinder can also act while the turning oil cylinder acts.

[0009] Preferably, the quantitative pump is provided with an overload unloading valve group, the overload unloading valve group comprises an overflow valve and a two-position two-way electromagnetic valve, the two-position two-way electromagnetic valve has a P port and a T port, and the safety working pressure of the overflow valve is 20Mpa, the oil outlet of the quantitative pump is connected with the oil inlet of the overflow valve, and the oil outlet of the overflow valve is connected with the hydraulic oil tank, the left control oil port of the overflow valve is connected with the P port of the two-position two-way electromagnetic valve, and the T port of the two-position two-way electromagnetic valve is connected with the hydraulic oil tank, and the right control oil port of the overflow valve is connected with the oil inlet of the overflow valve through a negative pressure pipe.

[0010] Preferably, the pipeline C is provided with a steady flow valve group, the steady flow valve group comprises a one-way valve three and an overflow control valve which are connected in parallel on the pipeline C, the connection of the oil inlet of the one-way valve three and the oil inlet of the overflow control valve on the pipeline C is set as P5, the connection of the oil outlet of the one-way valve three and the oil outlet of the overflow control valve on the pipeline C is set as P10, and the oil outlet of the one-way valve three is set as P6.

[0011] Preferably, the left control oil port of the overflow control valve is connected with the oil outlet of the one-way valve three through a negative pressure pipe one, and the back pressure of the overflow control valve is 1Mpa, when the three-position four-way directional valve three is in the right position and the turning oil cylinder extends, the hydraulic oil can enter the rodless cavity of the turning oil cylinder without pressure through the one-way valve three, and when the three-position four-way directional valve three is in the left position and the turning oil cylinder retracts, the hydraulic oil in the rodless cavity of the turning oil cylinder can return through the overflow control valve, to realize one-way stable back pressure return.

[0012] Preferably, the speed regulating valve group one comprises an adjustable throttle valve one and a one-way valve four which are connected in parallel on the pipeline C, the connection of the oil inlet of the adjustable throttle valve one and the oil outlet of the one-way valve four on the pipeline C is A1, the oil outlet of the adjustable throttle valve one is set as B1, and the oil inlet of the one-way valve four is set as C1.

[0013] The speed regulating valve group two comprises an adjustable throttle valve two and a one-way valve five which are arranged in parallel on the pipeline D, the connection of the oil inlet of the adjustable throttle valve two and the oil outlet of the one-way valve five on the pipeline D is A2, the oil outlet of the adjustable throttle valve two is B2, the oil inlet of the one-way valve five is C2, when the three-position four-way reversing valve three is in the right position, hydraulic oil enters the rodless cavity of the material turning cylinder through the adjustable throttle valve one, when the three-position four-way reversing valve three is in the left position, hydraulic oil enters the rod cavity of the material turning cylinder through the adjustable throttle valve two, so that the flow rate of hydraulic oil entering the rodless cavity or the rod cavity of the material turning cylinder can be adjusted.

[0014] Preferably, the one-way overflow valve group one comprises an electromagnetic overflow valve one and a one-way valve six which are arranged in parallel on the pipeline E, the electromagnetic overflow valve one has D1 and E1, the oil inlet of the one-way valve six is connected with F1 on the pipeline E, the oil outlet of the one-way valve six is connected with G1 on the pipeline E, D1 of the electromagnetic overflow valve one is connected with the oil inlet of the one-way valve six, E1 of the electromagnetic overflow valve one is connected with the oil outlet of the one-way valve six, and the right control oil outlet of the electromagnetic overflow valve one is connected with the oil inlet of the one-way valve six through the negative pressure pipe two.

[0015] Preferably, the one-way overflow valve group two comprises an electromagnetic overflow valve two and a one-way valve seven which are arranged in parallel on the pipeline F, the electromagnetic overflow valve two has D2 and E2, the oil inlet of the one-way valve seven is connected with F2 on the pipeline F, the oil outlet of the one-way valve seven is connected with G2 on the pipeline F, D2 of the electromagnetic overflow valve two is connected with the oil inlet of the one-way valve seven, E2 of the electromagnetic overflow valve two is connected with the oil outlet of the one-way valve two, and the left control oil outlet of the electromagnetic overflow valve two is connected with the oil inlet of the one-way valve seven through the negative pressure pipe three.

[0016] Preferably, the back pressure of the electromagnetic overflow valve one and the electromagnetic overflow valve two is 6Mpa, when the three-position four-way reversing valve three is in the right position, hydraulic oil enters the rodless cavity of the material turning cylinder, when the material turning cylinder is extended, if the piston rod in the material turning cylinder is displaced to the head, so that the pressure in the material turning cylinder is higher than 6Mpa, hydraulic oil enters the pipeline E through the linkage one-way valve one, and the electromagnetic overflow valve one is opened to enter the rod cavity of the pushing cylinder, so that the pushing cylinder can be retracted to realize that the material turning cylinder and the pushing cylinder can be operated at the same time.

[0017] The utility model discloses the beneficial effects are as follows:

[0018] Through the setting of the overload unloading valve group, when the cylinder is stuck, the system pressure is higher than the safety pressure of the overload unloading valve group, the hydraulic oil extracted by the quantitative pump can automatically return to the hydraulic oil tank, realizing the automatic unloading of the hydraulic system, and ensuring the safe operation of the system.

[0019] Through the setting of the steady flow valve group, when the three-position four-way reversing valve is in the third position and the left position and the turning oil cylinder is retracted, the hydraulic oil in the rodless cavity of the turning oil cylinder can return through the overflow control valve, realizing one-way stable back pressure return, and through the setting of the speed regulating valve group one and the speed regulating valve group two, the flow rate of the hydraulic oil entering the rodless cavity or the rod cavity of the turning oil cylinder can be adjusted.

[0020] Through the setting of the one-way overflow valve group one and the one-way overflow valve group two, when the three-position four-way reversing valve is in the third position and the right position, the hydraulic oil enters the rodless cavity of the turning oil cylinder, and when the turning oil cylinder is extended, if the piston rod in the turning oil cylinder is displaced to the head, so that the pressure in the turning oil cylinder rises to more than 6Mpa, the hydraulic oil will enter the pipeline E through the linkage one-way valve one, and will rush into the rod cavity of the pushing oil cylinder through the electromagnetic overflow valve one, so that the pushing oil cylinder can be retracted, realizing that the three-position four-way reversing valve can control the turning oil cylinder to act at the same time, and can also control the pushing oil cylinder to act, so that the two form an action sequence, realizing orderly control of the driving oil cylinder (the pushing oil cylinder and the turning oil cylinder) from the physical meaning, and reducing the complexity of the control system. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only the embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0022] Figure 1 It is a structural schematic view of the embodiment of the present application.

[0023] Figure 2 It is a structural schematic view of the steady flow valve group of the embodiment of the present application.

[0024] Figure 3 It is a structural schematic view of the speed regulating valve group one and the speed regulating valve group two of the embodiment of the present application.

[0025] Figure 4 It is a structural schematic view of the one-way overflow valve group one and the one-way overflow valve group two of the embodiment of the present application.

[0026] In the figure: 1, quantitative pump; 2, overflow valve; 3, two-position two-way electromagnetic valve; 4, three-position four-way reversing valve one; 5, three-position four-way reversing valve two; 6, one-way valve one; 7, one-way valve two; 8, one-way overflow valve group two; 8-1, electromagnetic overflow valve two; 8-2, one-way valve seven; 9, three-position four-way reversing valve three; 10, steady flow valve group; 10-1, one-way valve three; 10-2, overflow control valve; 11, speed regulating valve group one; 11-1, adjustable throttle valve one; 11-2, one-way valve four; 12, speed regulating valve group two; 12-1, adjustable throttle valve two; 12-2, one-way valve five; 13, turnover oil cylinder; 14, one-way overflow valve group one; 14-1, electromagnetic overflow valve one; 14-2, one-way valve six; 21, linkage one-way valve one; 22, linkage one-way valve two; 24, pushing oil cylinder. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the utility model clearer and more apparent, the following will be further explained in detail in combination with specific embodiments and with reference to the drawings.

[0028] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the utility model should be understood as the usual meaning by those skilled in the art to which the utility model belongs. The "first", "second" and similar words used in the utility model do not represent any order, quantity or importance, but are only used to distinguish different components. "Include" or "contain" and similar words mean that the elements or objects before the words cover the elements or objects listed after the words and their equivalents, without excluding other elements or objects. "Connection" or "connected" and similar words are not limited to physical or mechanical connection, but can include electrical connection, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to represent relative positional relationship, which can change accordingly when the absolute position of the described object changes.

[0029] As shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 A double-oil-cylinder sequential action driving system for driving the turnover oil cylinder 13 and the pushing oil cylinder 24 to act, comprising a hydraulic oil tank, a quantitative pump 1, a three-position four-way reversing valve one 4, a three-position four-way reversing valve two 5 and a three-position four-way reversing valve three 9, and the three-position four-way reversing valve one 4, the three-position four-way reversing valve two 5 and the three-position four-way reversing valve three 9 all have a P port, a T port, an A port and a B port, and the oil outlet of the quantitative pump 1 is connected with the P port of the three-position four-way reversing valve one 4.

[0030] and the A port of the three-position four-way directional valve one 4 is connected with the P port of the three-position four-way directional valve three 9, and the B port of the three-position four-way directional valve one 4 is connected with the P port of the three-position four-way directional valve two 5, and the P port and the T port of the three-position four-way directional valve two 5 are connected with each other, and the T port of the three-position four-way directional valve two 5 is connected with the hydraulic oil tank, so as to realize pressure oil unloading under no action, and the T port of the three-position four-way directional valve three 9 and the P port of the three-position four-way directional valve two 5 are connected with the one-way valve two 7;

[0031] The one-way valve one 6 and the one-way valve two 7 are mainly used for realizing selective passage of pressure oil, for example, when the three-position four-way directional valve one 4 is in the right position, the high-pressure oil extracted by the constant delivery pump 1 enters the one-way valve one 6 through the P port and the B port of the three-position four-way directional valve one 4, and the one-way valve two 7 can block the high-pressure oil from entering the three-position four-way directional valve three 9, and only enter the P port of the three-position four-way directional valve two 5 to unload, and similarly, when the high-pressure oil passing through the three-position four-way directional valve three 9 needs to be unloaded, only the one-way valve two 7 can pass through the P port and the T port of the three-position four-way directional valve two 5 to unload.

[0032] The A port of the three-position four-way directional valve three 9 and the rodless cavity of the turning oil cylinder 13 are connected with the pipeline C, and the pipeline C is provided with the speed regulating valve group one 11, the B port of the three-position four-way directional valve three 9 and the rodless cavity of the turning oil cylinder 13 are connected with the pipeline D, and the pipeline D is provided with the speed regulating valve group two 12, the A port of the three-position four-way directional valve two 5 and the rod cavity of the pushing oil cylinder 24 are connected with the pipeline E, and the pipeline E is provided with the one-way overflow valve group one 14, and the B port of the three-position four-way directional valve two 5 and the rodless cavity of the pushing oil cylinder 24 are connected with the one-way overflow valve group two 8.

[0033] The process of controlling the extension or retraction of the turning oil cylinder 13 is as follows:

[0034] Taking the extension of the turning oil cylinder 13 as an example, the three-position four-way directional valve one 4 is in the left position, and the three-position four-way directional valve three 9 is in the right position, the hydraulic oil extracted by the constant delivery pump 1 enters the pipeline C through the P port and the A port of the three-position four-way directional valve one 4 and the P port and the A port of the three-position four-way directional valve three 9, and then enters the rodless cavity of the turning oil cylinder 13 through the speed regulating valve group one 11, and when the hydraulic oil passes through the speed regulating valve group one 11, the flow rate of the hydraulic oil entering the rodless cavity of the turning oil cylinder 13 can be adjusted, and the hydraulic oil in the rod cavity of the turning oil cylinder 13 enters the one-way valve two 7 through the pipeline D, the B port and the T port of the three-position four-way directional valve three 9, and then enters the P port of the three-position four-way directional valve two 5 through the T port to unload, so as to realize the control of the extension of the turning oil cylinder 13.

[0035] Similarly, when the turning cylinder 13 needs to be retracted, the three-position four-way reversing valve three 9 is placed in the left position, the hydraulic oil enters the pipeline D through the P port and the B port of the three-position four-way reversing valve three 9, and enters the rod cavity of the turning cylinder 13 through the speed regulating valve group two 12, and the hydraulic oil in the rodless cavity of the turning cylinder 13 enters the P port and the T port of the three-position four-way reversing valve two 5 through the one-way valve two 7 to be unloaded.

[0036] The linkage one-way valve one 21 is connected between the pipeline C and the pipeline E, and the linkage one-way valve two 22 is connected between the pipeline D and the pipeline F, when the three-position four-way reversing valve three 9 is placed in the right position or the left position, in the process of the turning cylinder 13 extending or retracting, if the piston rod in the turning cylinder 13 is displaced to the head, so that the pressure in the turning cylinder 13 rises to exceed the pressure set by the one-way overflow valve group one 14 or the one-way overflow valve group two 8, the hydraulic oil will rush through the linkage one-way valve one 21 or the linkage one-way valve two 22 to open the one-way overflow valve group one 14 or the one-way overflow valve group two 8 to enter the pushing cylinder 24, so that the pushing cylinder 24 can retract or extend to realize that the pushing cylinder 24 can also act while the turning cylinder 13 acts.

[0037] The process of controlling the pushing cylinder 24 to extend or retract is as follows:

[0038] Taking the control of the pushing cylinder 24 to extend as an example, the three-position four-way reversing valve one 4 is placed in the right position, the three-position four-way reversing valve two 5 is placed in the left position, the hydraulic oil extracted by the constant delivery pump 1 enters the P port and the B port of the three-position four-way reversing valve one 4, and then enters the P port and the B port of the three-position four-way reversing valve two 5 through the one-way valve one 6, so as to enter the pipeline F, the pressure of the hydraulic oil entering the pipeline F will exceed the pressure set by the one-way overflow valve group two 8, so that the hydraulic oil will enter the rodless cavity of the pushing cylinder 24 through the one-way overflow valve group two 8, the hydraulic oil in the rod cavity of the pushing cylinder 24 enters the A port and the T port of the three-position four-way reversing valve two 5 through the pipeline E to be unloaded.

[0039] In an preferred embodiment of the utility model, constant delivery pump 1 is provided with overload unloading valve group, overload unloading valve group includes overflow valve 2 and two position two port solenoid valve 3, two position two port solenoid valve 3 has P port and T port, and the safe working pressure of overflow valve 2 is 20Mpa, the oil outlet of constant delivery pump 1 is connected with the oil inlet of overflow valve 2, and the oil outlet of overflow valve 2 is connected with hydraulic oil tank, the left side control oil port of overflow valve 2 is connected with the P port of two position two port solenoid valve 3, and the T port of two position two port solenoid valve 3 is connected with hydraulic oil tank, the right side control oil port of overflow valve 2 is connected with the oil inlet of overflow valve 2 through negative pressure pipe.

[0040] The safety setting safety working pressure of the overflow valve 2 is 20Mpa, which is slightly higher than the setting 18Mpa of the turning-over oil cylinder 13 and the pushing oil cylinder 24, when the oil cylinder is stuck, the system pressure is slightly high, and the safety valve is opened, the hydraulic system is unloaded, and the hydraulic system works, the two-position two-way electromagnetic valve 3 must be placed in the right position, the circuit is kept open, and the turning-over oil cylinder and the pushing oil cylinder can move, if placed in the left position, the oil extracted by the quantitative pump 1 can directly return to the hydraulic tank through the two-position two-way electromagnetic valve 3, at this time, the hydraulic system is unloaded.

[0041] In another preferred embodiment of the utility model, pipeline C is provided with steady flow valve group 10, steady flow valve group 10 includes parallelly arranged check valve three 10-1 and overflow control valve 10-2 on pipeline C, and the connection of the oil inlet of check valve three 10-1 and the oil inlet of overflow control valve 10-2 on pipeline C is P5, the connection of the oil outlet of check valve three 10-1 and the oil outlet of overflow control valve 10-2 on pipeline C is P10, and the oil outlet of check valve three 10-1 is P6.

[0042] The left control oil port of overflow control valve 10-2 is connected with the oil outlet of check valve three 10-1 through negative pressure pipe one, and the back pressure of overflow control valve 10-2 is 1Mpa.

[0043] When three-position four-way directional valve three 9 is placed in the right position, the hydraulic oil entering P port and A port in three-position four-way directional valve three 9 will enter check valve three 10-1 through P5, then enter speed regulating valve group one 11 through P6 and P10, and finally enter the rodless cavity of turning-over oil cylinder 13, when turning-over oil cylinder 13 is retracted and three-position four-way directional valve three 9 is placed in the left position, the hydraulic oil in the rodless cavity of turning-over oil cylinder 13 will overflow through overflow control valve 10-2 in the rodless cavity when unloading, that is, through P10 and P5 and enter three-position four-way directional valve three 9, because the volume of the rodless cavity is large, the flow rate of the rodless cavity is fast when returning oil, by setting the back pressure of overflow control valve 10-2 to 1Mpa, the hydraulic oil in the rodless cavity can be returned stably with back pressure in one way.

[0044] In still another preferred embodiment of the utility model, speed regulating valve group one 11 includes adjustable throttle valve one 11-1 and check valve four 11-2 which are arranged in parallel on pipeline C, the connection of the oil inlet of adjustable throttle valve one 11-1 and the oil outlet of check valve four 11-2 on pipeline C is A1, the oil outlet of adjustable throttle valve one 11-1 is B1, and the oil inlet of check valve four 11-2 is C1.

[0045] The second speed regulating valve group 12 includes a second adjustable throttle valve 12-1 and a fifth one-way valve 12-2 arranged in parallel on the pipeline D, the connection of the oil inlet of the second adjustable throttle valve 12-1 and the oil outlet of the fifth one-way valve 12-2 on the pipeline D is A2, the oil outlet of the second adjustable throttle valve 12-1 is B2, and the oil inlet of the fifth one-way valve 12-2 is C2.

[0046] When the three-position four-way valve three 9 is in the right position, the hydraulic oil enters the rodless chamber of the material turning cylinder 13 through the first adjustable throttle valve 11-1, that is, through A1 and B1; when the three-position four-way valve three 9 is in the left position, the hydraulic oil enters the rod chamber of the material turning cylinder 13 through the second adjustable throttle valve 12-1, that is, through A2 and B2, so as to adjust the flow rate of the hydraulic oil entering the rodless chamber or the rod chamber of the material turning cylinder 13.

[0047] It should be noted that the first one-way overflow valve group 14 includes a first electromagnetic overflow valve 14-1 and a sixth one-way valve 14-2 arranged in parallel on the pipeline E, the first electromagnetic overflow valve 14-1 has D1 and E1, the connection of the oil inlet of the sixth one-way valve 14-2 on the pipeline E is F1, the connection of the oil outlet of the sixth one-way valve 14-2 on the pipeline E is G1, the D1 of the first electromagnetic overflow valve 14-1 is connected with the oil inlet of the sixth one-way valve 14-2, the E1 of the first electromagnetic overflow valve 14-1 is connected with the oil outlet of the sixth one-way valve 14-2, and the right control oil port of the first electromagnetic overflow valve 14-1 is connected with the oil inlet of the sixth one-way valve 14-2 through the second negative pressure pipe.

[0048] The second one-way overflow valve group 8 includes a second electromagnetic overflow valve 8-1 and a seventh one-way valve 8-2 arranged in parallel on the pipeline F, the second electromagnetic overflow valve 8-1 has D2 and E2, the connection of the oil inlet of the seventh one-way valve 8-2 on the pipeline F is F2, the connection of the oil outlet of the seventh one-way valve 8-2 on the pipeline F is G2, the D2 of the second electromagnetic overflow valve 8-1 is connected with the oil inlet of the seventh one-way valve 8-2, the E2 of the second electromagnetic overflow valve 8-1 is connected with the oil outlet of the seventh one-way valve 8-2, and the left control oil port of the second electromagnetic overflow valve 8-1 is connected with the oil inlet of the seventh one-way valve 8-2 through the third negative pressure pipe.

[0049] The back pressure of the first electromagnetic overflow valve 14-1 and the second electromagnetic overflow valve 8-1 is 6Mpa,

[0050] The orderly action of the material turning cylinder 13 and the material pushing cylinder 24 forms the following action sequence:

[0051] With three position four way valve three 9 control turnover oil cylinder 13, push the oil cylinder 24 retracts as an example, make three position four way valve one 4 left position, three position four way valve two 5 middle position, three position four way valve three 9 right position, the hydraulic oil of quantitative pump 1 extraction passes through three position four way valve one 4 P port and A port and enters three position four way valve three 9 P port and A port, then through P5, P6, P10, and through A1 into adjustable flow valve one 11-1, then through B1 into the rodless cavity of turnover oil cylinder 13, the hydraulic oil in the rod cavity of turnover oil cylinder 13 is through C2 into one-way valve five 12-2, then through A2 into three position four way valve three 9 P port B port, then through one-way valve two 7 into three position four way valve two 5 P port and T port to unloading, make turnover oil cylinder 13 stretch out;

[0052] In the process of turnover oil cylinder 13 stretch out, if the piston rod in turnover oil cylinder 13 shifts to head, make the pressure in turnover oil cylinder 13 rise to more than 6Mpa, the hydraulic oil into pipeline C can pass through linkage one-way valve one 21 and enter G1 in pipeline E, and rush through electromagnetic overflow valve one 14-1 and enter the rod cavity of push oil cylinder 24, that is, through G1, E1, D1 and F1 in turn into the rod cavity of push oil cylinder 24, three position four way valve two 5 right position, make the hydraulic oil in the rodless cavity of push oil cylinder 24 can pass through F2 and enter one-way valve seven 8-2, then through G2 and enter B port and T port in three position four way valve two 5 to unloading, make push oil cylinder 24 can do the action of retraction, to realize that turnover oil cylinder 13 acts simultaneously push oil cylinder 24 can also act.

[0053] Those skilled in the art should understand that the discussion of the above any embodiment is only exemplary, and is not intended to imply that the scope of the utility model is limited to these examples; under the thought of the utility model, the above embodiment or the technical features in different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of the utility model as described above, for the sake of brevity, they are not provided in detail.

[0054] The embodiments of the utility model are intended to cover all such alternatives, modifications and variations falling within the broad scope of the appended claims. Therefore, any omission, modification, equivalent replacement, improvement, etc. made in the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A dual cylinder sequence actuation drive system for actuating a flipper cylinder (13) and a pusher cylinder (24) characterized by, The hydraulic system comprises a hydraulic oil tank, a constant delivery pump (1), a three-position four-way directional valve (4), a three-position four-way directional valve (5) and a three-position four-way directional valve (9), and the three-position four-way directional valves (4, 5 and 9) are provided with P ports, T ports, A ports and B ports, the oil outlet of the constant delivery pump (1) is connected with the P port of the three-position four-way directional valve (4), the A port of the three-position four-way directional valve (4) is connected with the P port of the three-position four-way directional valve (9), the B port of the three-position four-way directional valve (4) is connected with the P port of the three-position four-way directional valve (5), the P port and the T port of the three-position four-way directional valve (5) are in communication with each other, the T port of the three-position four-way directional valve (5) is connected with the hydraulic oil tank, the T port of the three-position four-way directional valve (9) is connected with the P port of the three-position four-way directional valve (5) through a one-way valve (7), the A port of the three-position four-way directional valve (9) is connected with the rodless cavity of a turnover oil cylinder (13) through a pipeline C, the pipeline C is provided with a speed regulating valve group (11), the B port of the three-position four-way directional valve (9) is connected with the rodless cavity of the turnover oil cylinder (13) through a pipeline D, the pipeline D is provided with a speed regulating valve group (12), the A port of the three-position four-way directional valve (5) is connected with the rod cavity of a pushing oil cylinder (24) through a pipeline E, the pipeline E is provided with a one-way overflow valve group (14), the B port of the three-position four-way directional valve (5) is connected with the rodless cavity of the pushing oil cylinder (24) through a one-way overflow valve group (8), the pipeline C and the pipeline E are connected with a linkage one-way valve (21), the pipeline D and the pipeline F are connected with a linkage one-way valve (22), when the three-position four-way directional valve (9) is in the right position or the left position, in the process of the extension or retraction of the turnover oil cylinder (13), if the piston rod in the turnover oil cylinder (13) is displaced to the head, so that the pressure in the turnover oil cylinder (13) rises to more than the pressure set by the one-way overflow valve group (14) or the one-way overflow valve group (8), the hydraulic oil will rush through the linkage one-way valve (21) or the linkage one-way valve (22) to open the one-way overflow valve group (14) or the one-way overflow valve group (8) to enter the pushing oil cylinder (24), so that the pushing oil cylinder (24) can retract or extend, so as to realize the action of the pushing oil cylinder (24) while the turnover oil cylinder (13) is in action.

2. A dual ram sequential actuation drive system as claimed in claim 1, wherein, The constant delivery pump (1) is provided with an overload unloading valve group, the overload unloading valve group comprises an overflow valve (2) and a two-position two-way electromagnetic valve (3), the two-position two-way electromagnetic valve (3) is provided with a P port and a T port, the oil outlet of the constant delivery pump (1) is connected with the oil inlet of the overflow valve (2), the oil outlet of the overflow valve (2) is connected with the hydraulic oil tank, the left side control oil port of the overflow valve (2) is connected with the P port of the two-position two-way electromagnetic valve (3), the T port of the two-position two-way electromagnetic valve (3) is connected with the hydraulic oil tank, and the right side control oil port of the overflow valve (2) is connected with the oil inlet of the overflow valve (2) through a negative pressure pipe.

3. A dual ram sequential actuation drive system as claimed in claim 1, wherein, The pipeline C is provided with a steady flow valve group (10), the steady flow valve group (10) includes a check valve three (10-1) and an overflow control valve (10-2) which are arranged in parallel on the pipeline C, and the connection of the oil inlet of the check valve three (10-1) and the oil inlet of the overflow control valve (10-2) on the pipeline C is P5, the connection of the oil outlet of the check valve three (10-1) and the oil outlet of the overflow control valve (10-2) on the pipeline C is P10, and the oil outlet of the check valve three (10-1) is P6.

4. A dual ram sequential actuation drive system as claimed in claim 3, wherein, The left side control oil port of the overflow control valve (10-2) is connected with the oil outlet of the check valve three (10-1) through a negative pressure pipe one, and the back pressure of the overflow control valve (10-2) is 1Mpa, when the three-position four-way reversing valve three (9) is in the right position and the tilting cylinder (13) is extended, the hydraulic oil can enter the rodless cavity of the tilting cylinder (13) without pressure through the check valve three (10-1), and when the three-position four-way reversing valve three (9) is in the left position and the tilting cylinder (13) is retracted, the hydraulic oil in the rodless cavity of the tilting cylinder (13) can return to oil through the overflow control valve (10-2), so as to realize the stable backflow with back pressure.

5. A dual ram sequential actuation drive system as in claim 1, wherein, The speed regulating valve group one (11) includes an adjustable throttle valve one (11-1) and a check valve four (11-2) which are arranged in parallel on the pipeline C, the connection of the oil inlet of the adjustable throttle valve one (11-1) and the oil outlet of the check valve four (11-2) on the pipeline C is A1, and the oil outlet of the adjustable throttle valve one (11-1) is B1, and the oil inlet of the check valve four (11-2) is C1. The speed regulating valve group two (12) includes an adjustable throttle valve two (12-1) and a check valve five (12-2) which are arranged in parallel on the pipeline D, the connection of the oil inlet of the adjustable throttle valve two (12-1) and the oil outlet of the check valve five (12-2) on the pipeline D is A2, and the oil outlet of the adjustable throttle valve two (12-1) is B2, and the oil inlet of the check valve five (12-2) is C2, when the three-position four-way reversing valve three (9) is in the right position, the hydraulic oil enters the rodless cavity of the tilting cylinder (13) through the adjustable throttle valve one (11-1), and when the three-position four-way reversing valve three (9) is in the left position, the hydraulic oil enters the rod cavity of the tilting cylinder (13) through the adjustable throttle valve two (12-1), so as to realize the adjustable flow rate of the hydraulic oil entering the rodless cavity or the rod cavity of the tilting cylinder (13).

6. A dual ram sequential actuation drive system as in claim 1, wherein, The one-way overflow valve group one (14) includes electromagnetic overflow valve one (14-1) and one-way valve six (14-2) arranged in parallel on pipeline E, and electromagnetic overflow valve one (14-1) has D1 port and E1 port, the oil inlet of one-way valve six (14-2) is connected as F1 on pipeline E, the oil outlet of one-way valve six (14-2) is connected as G1 on pipeline E, the oil inlet of one-way valve six (14-2) is connected with D1 port of electromagnetic overflow valve one (14-1), and the oil outlet of one-way valve six (14-2) is connected with E1 port of electromagnetic overflow valve one (14-1), and the right oil control port of electromagnetic overflow valve one (14-1) is connected with the oil inlet of one-way valve six (14-2) through negative pressure pipe two.

7. A dual ram sequential actuation drive system as claimed in claim 6, wherein, The one-way overflow valve group two (8) includes electromagnetic overflow valve two (8-1) and one-way valve seven (8-2) arranged in parallel on pipeline F, and electromagnetic overflow valve two (8-1) has D2 port and E2 port, the oil inlet of one-way valve seven (8-2) is connected as F2 on pipeline F, the oil outlet of one-way valve seven (8-2) is connected as G2 on pipeline F, D2 of electromagnetic overflow valve two (8-1) is connected with the oil inlet of one-way valve seven (8-2), and E2 port of electromagnetic overflow valve two (8-1) is connected with the oil outlet of one-way valve seven (8-2), and the left oil control port of electromagnetic overflow valve two (8-1) is connected with the oil inlet of one-way valve seven (8-2) through negative pressure pipe three.

8. A dual ram sequential actuation drive system as claimed in claim 7, wherein, The back pressure of electromagnetic overflow valve one (14-1) and electromagnetic overflow valve two (8-1) is 6Mpa, when three-position four-way directional valve three (9) is in right position, hydraulic oil enters the rodless cavity of turnover oil cylinder (13), when the piston rod of turnover oil cylinder (13) is displaced to the head, the pressure in turnover oil cylinder (13) rises to more than 6Mpa, hydraulic oil enters pipeline E through linkage one-way valve one (21), and electromagnetic overflow valve one (14-1) is opened to enter the rod cavity of pushing oil cylinder (24), so that pushing oil cylinder (24) can do the action of closing, so that turnover oil cylinder (13) can act at the same time, and pushing oil cylinder (24) can also act.

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