A hoisting hydraulic system with a full-automatic synchronization function

Abstract

The present invention discloses a hoisting hydraulic system with a full-automatic synchronization function, which relates to the technical field of mining machinery manufacturing. It includes a motor, a working pump, an electromagnetic overflow valve, an electromagnetic proportional directional valve A, an electromagnetic proportional directional valve B, an electromagnetic proportional directional valve C, a synchronous motor, a directional valve A, a directional valve B, a directional valve C, a directional valve D, a directional valve E, a directional valve F, a directional valve G, a directional valve H, a balance valve A, a balance valve B, a balance valve C, a balance valve D, a shuttle valve A, a shuttle valve B, a shuttle valve C, a shuttle valve D, a winch motor A, and a winch motor B. It can separately control the hoisting and lowering of the hoisting mechanism one corresponding to the winch motor A and the hoisting mechanism two corresponding to the winch motor B, and can also synchronously control the hoisting and lowering. At the same time, during synchronous control, it can simultaneously control the hoisting and lowering of the hoisting mechanism one or the hoisting mechanism two, and compensate for the hoisting mechanism one or the hoisting mechanism two during synchronous control.

Description

Technical Field

[0001] The present invention relates to the technical field of mining machinery manufacturing, and particularly to a lifting hydraulic system with a full-automatic synchronization function. Background Art

[0002] In mines and other workplaces, different types of mobile working machines are used. The mobile working machine is provided with one or more working devices for performing the designed work tasks at the workplace. The mobile working machine can be, for example, a wheel loader, a transport vehicle or a dump truck, a rock drill, an excavator or a lift. At present, the synchronization of the lifting hydraulic systems in many domestic mines is low, and it is basically manually operated, which causes certain damage to the equipment and affects the work efficiency. Summary of the Invention

[0003] The purpose of the present invention is to provide a lifting hydraulic system with a full-automatic synchronization function in order to solve the above technical problems.

[0004] The present invention specifically adopts the following technical solutions to achieve the above purpose:

[0005] A lifting hydraulic system with a full-automatic synchronization function includes a motor, a working pump, an electromagnetic overflow valve, an electromagnetic proportional directional valve A, an electromagnetic proportional directional valve B, an electromagnetic proportional directional valve C, a synchronous motor, a directional valve A, a directional valve B, a directional valve C, a directional valve D, a directional valve E, a directional valve F, a directional valve G, a directional valve H, a balance valve A, a balance valve B, a balance valve C, a balance valve D, a shuttle valve A, a shuttle valve B, a shuttle valve C and a shuttle valve D, a winch motor A, a winch motor B;

[0006] The port A of the electromagnetic proportional directional valve A is connected to the port A of the synchronous motor; the port B1 of the synchronous motor is connected to the port P of the directional valve E, the port A of the directional valve E is connected to the port A of the balance valve C, the port B of the balance valve C is connected to the port B of the winch motor B, the port A of the winch motor B is connected to the port B of the balance valve D, the port A of the balance valve D is connected to the port A of the directional valve H, and the port P of the directional valve H is connected to the port B of the electromagnetic proportional directional valve A; the port B2 of the synchronous motor is connected to the port P of the directional valve A; the port A of the directional valve A is connected to the port A of the balance valve A, the port B of the balance valve A is connected to the port B of the winch motor A; the port A of the winch motor A is connected to the port B of the balance valve B; the port A of the balance valve B is connected to the port A of the directional valve C; the port P of the directional valve C is connected to the port B of the electromagnetic proportional directional valve B;

[0007] The port A of the electromagnetic proportional directional valve B is connected to the port P of the directional valve B, the port A of the directional valve B is connected to the port A of the balance valve A, the port A of the balance valve B is connected to the port A of the directional valve D, and the port P of the directional valve D is connected to the port B of the electromagnetic proportional directional valve A;

[0008] The port A of the electromagnetic proportional direction valve C is connected to the port P of the direction valve F, the port A of the direction valve F is connected to the port A of the balance valve C, the port A of the balance valve D is connected to the port A of the direction valve G, and the port P of the direction valve G is connected to the port B of the electromagnetic proportional direction valve C;

[0009] The intake port P1 of the shuttle valve A is connected to the port P of the direction valve A, the intake port P2 is connected to the port B of the electromagnetic proportional direction valve A, and the outlet port A is respectively connected to the port X of the direction valve A and the direction valve B; The intake port P1 of the shuttle valve B is connected to the port P of the direction valve E, the intake port P2 is connected to the port B of the electromagnetic proportional direction valve A, and the outlet port A is respectively connected to the port X of the direction valve E and the direction valve F;

[0010] The intake port P1 of the shuttle valve C is connected to the port A of the balance valve D, the intake port P2 is connected to the port A of the balance valve C, and the outlet port A is connected to the control end of the winch brake corresponding to the winch motor B; The intake port P1 of the shuttle valve D is connected to the port A of the balance valve B, the intake port P2 is connected to the port A of the balance valve A, and the outlet port A is connected to the control end of the winch brake corresponding to the winch motor A;

[0011] The ports P of the electromagnetic proportional direction valve A, the electromagnetic proportional direction valve B, and the electromagnetic proportional direction valve C are all connected to the port P of the electromagnetic relief valve, and the ports T of the electromagnetic proportional direction valve A, the electromagnetic proportional direction valve B, and the electromagnetic proportional direction valve C are connected to the fuel tank; The motor drives the working pump, and the working pump is connected to the ports P of the electromagnetic proportional direction valve A, the electromagnetic proportional direction valve B, and the electromagnetic proportional direction valve C.

[0012] Further, a displacement sensor A and a displacement sensor B are further included. The displacement sensor A is used to obtain the rising and falling distances of the hoisting mechanism two corresponding to the winch motor A, and the displacement sensor B is used to obtain the rising and falling distances of the hoisting mechanism one corresponding to the winch motor B.

[0013] Further, an oil suction filter is provided at the oil suction port of the working pump.

[0014] Further, a return oil filter is connected to the port T of the electromagnetic relief valve.

[0015] Further, a high-pressure filter is provided between the ports P of the electromagnetic proportional direction valve A, the electromagnetic proportional direction valve B, and the electromagnetic proportional direction valve C and the working pump.

[0016] Further, a check valve is provided between the ports P of the electromagnetic proportional direction valve A, the electromagnetic proportional direction valve B, and the electromagnetic proportional direction valve C and the working pump.

[0017] Further, it also includes a pressure reducing and overflow valve A, a pressure reducing and overflow valve B, and a pressure reducing and overflow valve C. The port A of the pressure reducing and overflow valve A is connected to the port P of the electromagnetic proportional directional valve A. The port A of the pressure reducing and overflow valve B is connected to the port P of the electromagnetic proportional directional valve B. The port A of the pressure reducing and overflow valve C is connected to the port P of the electromagnetic proportional directional valve C. The ports P of the pressure reducing and overflow valve A, the pressure reducing and overflow valve B, and the pressure reducing and overflow valve C are all connected to the port P of the electromagnetic overflow valve, and the ports T are all connected to the port T of the electromagnetic overflow valve.

[0018] Further, a shock-resistant pressure gauge is connected to the port P of the electromagnetic overflow valve.

[0019] The beneficial effects of the present invention are as follows:

[0020] A hoisting hydraulic system with a full-automatic synchronization function according to the present invention can separately control the hoisting and lowering of the hoisting mechanism 1 corresponding to the winch motor A and the hoisting mechanism 2 corresponding to the winch motor B, and can also synchronously control the hoisting and lowering. At the same time, during synchronous control, when the difference in hoisting or lowering between the hoisting mechanism 1 and the hoisting mechanism 2 reaches the set value that needs to be compensated, it can simultaneously control the hoisting or lowering of the hoisting mechanism 1 or the hoisting mechanism 2 to compensate for the hoisting mechanism 1 or the hoisting mechanism 2 during synchronous control until the hoisting and lowering distances of the hoisting mechanism 1 and the hoisting mechanism 2 are the same. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of the present invention.

[0022] Reference Numerals:

[0023] 1 - suction filter, 2 - motor, 3 - working pump, 4 - return oil filter, 5 - high-pressure filter, 6 - shock-resistant pressure gauge, 7 - electromagnetic overflow valve, 8 - check valve, 91 - pressure reducing and overflow valve A, 92 - pressure reducing and overflow valve B, 93 - pressure reducing and overflow valve C, 101 - electromagnetic proportional directional valve A, 102 - electromagnetic proportional directional valve B, 103 - electromagnetic proportional directional valve C, 11 - synchronous motor, 121 - shuttle valve A, 122 - shuttle valve B, 123 - shuttle valve C, 124 - shuttle valve D, 131 - directional valve A, 132 - directional valve B, 133 - directional valve C, 134 - directional valve D, 135 - directional valve E, 136 - directional valve F, 137 - directional valve G, 138 - directional valve H, 141 - balance valve A, 142 - balance valve B, 143 - balance valve C, 144 - balance valve D, 151 - displacement sensor A, 152 - displacement sensor B, 161 - winch motor A, 162 - winch motor B. DETAILED DESCRIPTION OF THE INVENTION

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. The components of the embodiments of the present invention usually described and illustrated in the drawings here can be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0026] Embodiment 1

[0027] As Figure 1 shown, this embodiment provides a hoisting hydraulic system with a full-automatic synchronization function, including a motor 2, a working pump 3, an electromagnetic overflow valve 7, an electromagnetic proportional directional valve A 101, an electromagnetic proportional directional valve B 102, an electromagnetic proportional directional valve C 103, a synchronous motor 11, a directional valve A 131, a directional valve B 132, a directional valve C 133, a directional valve D 134, a directional valve E 135, a directional valve F 136, a directional valve G 137, a directional valve H 138, a balance valve A 141, a balance valve B 142, a balance valve C 143, a balance valve D 144, a shuttle valve A 121, a shuttle valve B 122, a shuttle valve C 123, a shuttle valve D 124, a winch motor A 161, and a winch motor B 162;

[0028] The port A of the electromagnetic proportional directional valve A 101 is connected to the port A of the synchronous motor 11; the port B1 of the synchronous motor 11 is connected to the port P of the directional valve E 135, the port A of the directional valve E 135 is connected to the port A of the balance valve C 143, the port B of the balance valve C 143 is connected to the port B of the winch motor B 162, the port A of the winch motor B 162 is connected to the port B of the balance valve D 144, the port A of the balance valve D 144 is connected to the port A of the directional valve H 138, and the port P of the directional valve H 138 is connected to the port B of the electromagnetic proportional directional valve A 101; the port B2 of the synchronous motor 11 is connected to the port P of the directional valve A 131; the port A of the directional valve A 131 is connected to the port A of the balance valve A 141, the port B of the balance valve A 141 is connected to the port B of the winch motor A 161; the port A of the winch motor A 161 is connected to the port B of the balance valve B 142; the port A of the balance valve B 142 is connected to the port A of the directional valve C 133; and the port P of the directional valve C 133 is connected to the port B of the electromagnetic proportional directional valve B 102;

[0029] The A port of the electromagnetic proportional directional control valve B102 is connected to the P port of the directional control valve B132. The A port of the directional control valve B132 is connected to the A port of the balance valve A141. The A port of the balance valve B142 is connected to the A port of the directional control valve D134. The P port of the directional control valve D134 is connected to the B port of the electromagnetic proportional directional control valve A101.

[0030] The A port of the electromagnetic proportional directional control valve C103 is connected to the P port of the directional control valve F136. The A port of the directional control valve F136 is connected to the A port of the balance valve C143. The A port of the balance valve D144 is connected to the A port of the directional control valve G137. The P port of the directional control valve G137 is connected to the B port of the electromagnetic proportional directional control valve C103.

[0031] The intake port P1 of the shuttle valve A121 is connected to the P port of the directional control valve A131, the intake port P2 is connected to the B port of the electromagnetic proportional directional control valve A101, and the outlet port A is respectively connected to the X ports of the directional control valve A131 and the directional control valve B132. The intake port P1 of the shuttle valve B122 is connected to the P port of the directional control valve E135, the intake port P2 is connected to the B port of the electromagnetic proportional directional control valve A101, and the outlet port A is respectively connected to the X ports of the directional control valve E135 and the directional control valve F136.

[0032] The intake port P1 of the shuttle valve C123 is connected to the A port of the balance valve D144, the intake port P2 is connected to the A port of the balance valve C143, and the outlet port A is connected to the control end of the winch brake corresponding to the winch motor B162. The intake port P1 of the shuttle valve D124 is connected to the A port of the balance valve B142, the intake port P2 is connected to the A port of the balance valve A141, and the outlet port A is connected to the control end of the winch brake corresponding to the winch motor A161.

[0033] The P ports of the electromagnetic proportional directional control valve A101, the electromagnetic proportional directional control valve B102, and the electromagnetic proportional directional control valve C103 are all connected to the P port of the electromagnetic relief valve 7. The T ports of the electromagnetic proportional directional control valve A101, the electromagnetic proportional directional control valve B102, and the electromagnetic proportional directional control valve C103 are connected to the fuel tank. The motor 2 drives the working pump 3, and the working pump 3 is connected to the P ports of the electromagnetic proportional directional control valve A101, the electromagnetic proportional directional control valve B102, and the electromagnetic proportional directional control valve C103.

[0034] Preferably, it further includes a displacement sensor A151 and a displacement sensor B152. The displacement sensor A151 is used to obtain the rising and falling distances of the hoisting mechanism two corresponding to the winch motor A161, and the displacement sensor B152 is used to obtain the rising and falling distances of the hoisting mechanism one corresponding to the winch motor B162.

[0035] The working principle of the present invention is:

[0036] The hoisting mechanism two corresponding to the winch motor A161 and the hoisting mechanism one corresponding to the winch motor B162 can work independently or synchronously.

[0037] When the hoisting mechanism one works independently, the motor 2 is powered on, and the electromagnet YV01 of the electro-hydraulic relief valve 7 is powered on, and the system is ready for work.

[0038] Hoisting condition:

[0039] The system reads the rising distance of the hoisting mechanism one through the displacement sensor B152. When the system-set distance is less than the set pressure value, the system program controls the electromagnet YV07 of the electro-hydraulic proportional directional valve C103 to be powered on and work. The P port of the electro-hydraulic proportional directional valve C103 is connected to the A port, the A port of the electro-hydraulic proportional directional valve C103 is connected to the P port of the directional valve F136, the A port of the directional valve F136 is connected to the A port of the balance valve C143, the B port of the balance valve C143 is connected to the B port of the winch motor B162, the A port of the winch motor B162 is connected to the B port of the balance valve D144, the A port of the balance valve D144 is connected to the A port of the directional valve H138, the P port of the directional valve H138 is connected to the B port of the electro-hydraulic proportional directional valve A101, the B port of the electro-hydraulic proportional directional valve A101 is connected to the T port of the electro-hydraulic proportional directional valve A101, and the T port of the electro-hydraulic proportional directional valve A101 is connected to the oil tank. To make the hoisting mechanism one operate in a predetermined direction, when the set working distance is reached, the system program issues an instruction to control the electromagnet YV07 of the electro-hydraulic proportional directional valve C103 to lose power and stop working, and the system automatically completes the operation.

[0040] Lowering condition:

[0041] The system reads the lowering distance of the hoisting mechanism one through the displacement sensor B152. When the system-set distance is less than the set pressure value, the system program controls the electromagnet YV06 of the electro-hydraulic proportional directional valve C103 to be powered on and work. The P port of the electro-hydraulic proportional directional valve C103 is connected to the B port, the B port of the electro-hydraulic proportional directional valve C103 is connected to the P port and the X port of the directional valve G137, and the X port makes the P port of the directional valve G137 connected to the A port. The A port of the directional valve G137 is connected to the A port of the balance valve D144, the B port of the balance valve D144 is connected to the A port of the winch motor B162; the B port of the winch motor B162 is connected to the B port of the balance valve C143; the A port of the balance valve C143 is connected to the A port of the directional valve F136, the P port of the directional valve F136 is connected to the A port of the electro-hydraulic proportional directional valve C103, the A port of the electro-hydraulic proportional directional valve C103 is connected to the T port of the electro-hydraulic proportional directional valve C103, and the T port of the electro-hydraulic proportional directional valve C103 is connected to the oil tank. To make the hoisting mechanism one operate in a predetermined direction, when the set working distance is reached, the system program issues an instruction to control the electromagnet YV06 of the electro-hydraulic proportional directional valve C103 to lose power and stop working, and the system automatically completes the operation.

[0042] When the second hoisting mechanism works independently, the motor 2 is powered on, and the electromagnet YV01 of the electromagnetic overflow valve 7 is powered on, and the system is ready for work.

[0043] Hoisting condition:

[0044] The system reads the rising distance of the second hoisting mechanism through the displacement sensor A151. When the set distance of the system is less than the set pressure value, the system program controls the electromagnet YV05 of the electro-hydraulic proportional directional valve B102 to be powered on. The P port of the electro-hydraulic proportional directional valve B102 is connected to the A port, and the A port of the electro-hydraulic proportional directional valve B102 is connected to the P port of the directional valve B132; the A port of the directional valve B132 is connected to the A port of the balance valve A141; the B port of the balance valve A141 is connected to the B port of the winch motor A161; the A port of the winch motor A161 is connected to the B port of the balance valve B142; the A port of the balance valve B142 is connected to the A port of the directional valve D134; the P port of the directional valve D134 is connected to the B port of the electro-hydraulic proportional directional valve A101; the B port of the electro-hydraulic proportional directional valve A101 is connected to the T port of the electro-hydraulic proportional directional valve A101; the T port of the electro-hydraulic proportional directional valve A101 is connected to the oil tank. The second hoisting mechanism runs in the predetermined direction. When the set working distance is reached, the system program issues an instruction to de-energize the electromagnet YV05 of the electro-hydraulic proportional directional valve B102 to stop working, and the system automatically completes the operation.

[0045] Lowering condition:

[0046] The system reads the lowering distance of the mechanism through the displacement sensor A151. When the set distance of the system is less than the set pressure value, the system program controls the electromagnet YV04 of the electro-hydraulic proportional directional valve B102 to be powered on. The P port of the electro-hydraulic proportional directional valve B102 is connected to the B port, and the B port of the electro-hydraulic proportional directional valve B102 is connected to the P port and X port of the directional valve C133. The X port makes the P port of the directional valve C133 connected to the A port. The A port of the directional valve C133 is connected to the A port of the balance valve B142. The B port of the balance valve B142 is connected to the A port of the winch motor A161. The B port of the winch motor A161 is connected to the B port of the balance valve A141. The A port of the balance valve A141 is connected to the A port of the directional valve B132. The P port of the directional valve B132 is connected to the port of the electro-hydraulic proportional directional valve A101; the port of the electro-hydraulic proportional directional valve A101 is connected to the T port of the electro-hydraulic proportional directional valve. The T port of the electro-hydraulic proportional directional valve B102 is connected to the oil tank. The second hoisting mechanism runs in the predetermined direction. When the set working distance is reached, the system program issues an instruction to de-energize the electromagnet YV04 of the electro-hydraulic proportional directional valve B102 to stop working, and the system automatically completes the operation.

[0047] When working synchronously, the motor 2 is powered on, and the electromagnet YV01 of the electromagnetic overflow valve 7 is powered on, and the system is ready for work.

[0048] Synchronous hoisting condition:

[0049] The system reads the lifting distance of the mechanism through displacement sensor A151 and displacement sensor B152. When the set distance of the system is less than the set pressure value, the system program controls the electromagnet YV03 of the electro-hydraulic proportional directional valve A101 to be energized and work. The A port of the electro-hydraulic proportional directional valve A101 is connected to the A port of the synchronous motor 11. The B1 port of the synchronous motor 11 is connected to the P port and X port of the directional valve E135 and the directional valve F136. The X port disconnects the P port and A port of the directional valve F136, and the X port connects the P port and A port of the directional valve E135. The A port of the directional valve E135 is connected to the A port of the balance valve C143. The B port of the balance valve C143 is connected to the B port of the winch motor B162. The A port of the winch motor B162 is connected to the B port of the balance valve D144. The A port of the balance valve D144 is connected to the A port of the directional valve H138. The P port of the directional valve H138 is connected to the B port of the electro-hydraulic proportional directional valve A101. The B2 port of the synchronous motor 11 is connected to the P port and X port of the directional valve A131 and the directional valve B132. The X port connects the P port and A port of the directional valve A131, and the X port disconnects the P port and A port of the directional valve B132. The A port of the directional valve A131 is connected to the A port of the balance valve A141. The B port of the balance valve A141 is connected to the B port of the winch motor A161. The A port of the winch motor A161 is connected to the B port of the balance valve B142. The A port of the balance valve B142 is connected to the A port of the directional valve D134. The P port of the directional valve D134 is connected to the B port of the electro-hydraulic proportional directional valve A101. The T port of the electro-hydraulic proportional directional valve A101 is connected to the oil tank. This makes the first hoisting mechanism and the second hoisting mechanism run in a predetermined direction. When the set working distance is reached, the system program issues an instruction to control the electromagnet YV03 of the electro-hydraulic proportional directional valve A101 to lose power and stop working, and the system automatically completes the operation.

[0050] Synchronous lowering condition:

[0051] The system reads the lowering distance of the first hoisting mechanism through displacement sensor A151 and the lowering distance of the second hoisting mechanism through displacement sensor B152. When the set distance of the system is less than the set pressure value, the system program controls the electromagnet YV02 of the electro-hydraulic proportional directional valve A101 to be energized. The P port and B port of the electro-hydraulic proportional directional valve A101 are connected. The B port of the electro-hydraulic proportional directional valve A101 is connected to the P ports of the directional valve D134, directional valve H138, and the X ports of the directional valve A131, directional valve B132, directional valve E135, and directional valve F136. The X port connects the P ports and A ports of the directional valve A131 and directional valve E135, and the X port disconnects the P ports and A ports of the directional valve B132 and directional valve F136. The A port of the directional valve D134 is connected to the A port of the balance valve B142. The B port of the balance valve B142 is connected to the A port of the winch motor A161. The B port of the winch motor A161 is connected to the B port of the balance valve A141. The A port of the balance valve A141 is connected to the A port of the directional valve A131. The P port of the directional valve A131 is connected to the B2 port of the synchronous motor 11. The A port of the directional valve H138 is connected to the A port of the balance valve D144. The B port of the balance valve D144 is connected to the A port of the winch motor B162. The B port of the winch motor B162 is connected to the B port of the balance valve C143. The A port of the balance valve C143 is connected to the A port of the directional valve E135. The P port of the directional valve E135 is connected to the B1 port of the synchronous motor 11. The A port of the synchronous motor 11 is connected to the A port of the electro-hydraulic proportional directional valve A101. The A port of the electro-hydraulic proportional directional valve A101 is connected to the T of the electro-hydraulic proportional directional valve A101. The T port of the electro-hydraulic proportional directional valve A101 is connected to the oil tank. This makes the first hoisting mechanism and the second hoisting mechanism operate in a predetermined direction. When the set working distance is reached, the system program issues an instruction to control the electromagnet YV02 of the electro-hydraulic proportional directional valve A101 to lose power and stop working, and the system automatically completes the operation work.

[0052] When the first hoisting mechanism and the second hoisting mechanism work synchronously, they have synchronous hoisting compensation and synchronous lowering compensation.

[0053] Synchronous hoisting compensation condition 1:

[0054] When there is a deviation in the data read by the system from displacement sensor A151 and displacement sensor B152, and the data of displacement sensor A151 is less than the data of displacement sensor B152 by a set value that requires compensation, the system program controls the first hoisting mechanism and the second hoisting mechanism to hoist synchronously. At the same time, the system compensates for the second hoisting mechanism, and the system will simultaneously issue an instruction to run the program for the rising condition of the second hoisting mechanism; until the data of displacement sensor A151 and displacement sensor B152 are the same, the system program issues an instruction to stop running the program for the rising condition of the second hoisting mechanism, and the compensation work is completed.

[0055] Synchronous hoisting compensation condition 2:

[0056] The system reads the data of displacement sensor A151 and displacement sensor B152 with deviation, and the data of displacement sensor A151 is greater than that of displacement sensor B152 by a set value that needs compensation. The system program controls the synchronous lifting of hoisting mechanism 1 and hoisting mechanism 2. Meanwhile, the running system compensates hoisting mechanism 1, and the system will simultaneously command the program of the rising working condition of hoisting mechanism 1 to run; until the data of displacement sensor A151 and displacement sensor B152 are the same, the system program issues an instruction to stop the program of the rising working condition of hoisting mechanism 1, and the compensation work is completed.

[0057] Synchronous descending compensation working condition 1:

[0058] The system reads the data of displacement sensor A151 and displacement sensor B152 with deviation, and the data of displacement sensor A151 is greater than that of displacement sensor B152 by a set value that needs compensation. The system program controls the synchronous descending of hoisting mechanism 1 and hoisting mechanism 2. Meanwhile, the running system compensates hoisting mechanism 1, and the system will simultaneously command the program of the descending working condition of hoisting mechanism 2 to run; until the data of displacement sensor A151 and displacement sensor B152 are the same, the system program issues an instruction to stop the program of the descending working condition of hoisting mechanism 2, and the compensation work is completed.

[0059] Synchronous descending compensation working condition 2:

[0060] The system reads the data of displacement sensor A151 and displacement sensor B152 with deviation, and the data of displacement sensor A151 is greater than that of displacement sensor B152 by a set value that needs compensation. The system program controls the synchronous descending of hoisting mechanism 1 and hoisting mechanism 2. Meanwhile, the running system compensates hoisting mechanism 1, and the system will simultaneously command the program of the descending working condition of hoisting mechanism 1 to run; until the data of displacement sensor A151 and displacement sensor B152 are the same, the system program issues an instruction to stop the program of the descending working condition of hoisting mechanism 1, and the compensation work is completed.

[0061] Automatic circulation filtration function of the hydraulic system:

[0062] Start motor 2, and at the same time all solenoid valves are de-energized. The system realizes automatic circulation filtration to filter the oil in the hydraulic oil tank.

[0063] Embodiment 2

[0064] On the basis of Embodiment 1, as Figure 1 shown, it further includes an oil suction filter 1 arranged at the oil suction port of the working pump 3.

[0065] In this embodiment, an oil suction filter 1 is provided at the oil suction port of the working pump 3 to protect the working pump 3 and other hydraulic components from inhaling contaminated impurities, effectively controlling the contamination of the hydraulic system and ensuring the cleanliness of the hydraulic system.

[0066] Embodiment 3

[0067] Based on Embodiment 1, as Figure 1 shown, the T port of the electromagnetic overflow valve 7 is connected to an oil return filter 4.

[0068] In this embodiment, the T port of the electromagnetic overflow valve 7 is connected to an oil return filter 4, which is located on the oil return pipeline. Various contaminants such as abrasive particles generated during the operation of various hydraulic components can be intercepted by setting the oil filter on the oil return pipeline, preventing them from returning to the fuel tank again.

[0069] Embodiment 4

[0070] Based on Embodiment 1, as Figure 1 shown, a high-pressure filter 5 is provided between the P ports of the electromagnetic proportional directional valves A101, B101, C103 and the working pump 3.

[0071] In this embodiment, a high-pressure filter 5 is provided between the P ports of the electromagnetic proportional directional valves A101, B101, C103 and the working pump 3, which is convenient for filtering solid and liquid impurities in high-pressure compressed air.

[0072] Embodiment 5

[0073] Based on Embodiment 1, as Figure 1 shown, a check valve 8 is provided between the P ports of the electromagnetic proportional directional valves A101, B101, C103 and the working pump 3.

[0074] In this embodiment, a check valve 8 is provided between the P ports of the electromagnetic proportional directional valves A101, B101, C103 and the working pump 3, which is convenient for preventing the reverse flow of oil in the hydraulic system.

[0075] Embodiment 6

[0076] Based on Embodiment 1, as Figure 1As shown, it further includes a pressure reducing and overflow valve A91, a pressure reducing and overflow valve B92, and a pressure reducing and overflow valve C93. The port A of the pressure reducing and overflow valve A91 is connected to the port P of the electro-hydraulic proportional directional valve A101, and the port P is connected to the port P of the electro-hydraulic overflow valve 7. The port A of the pressure reducing and overflow valve C93 is connected to the port P of the electro-hydraulic proportional directional valve C103. The ports P of the pressure reducing and overflow valve A91, the pressure reducing and overflow valve B92, and the pressure reducing and overflow valve C93 are all connected to the port P of the electro-hydraulic overflow valve 7, and the ports T are all connected to the port T of the electro-hydraulic overflow valve 7.

[0077] In this embodiment, by providing the pressure reducing and overflow valve A91, the pressure reducing and overflow valve B92, and the pressure reducing and overflow valve C93, it is ensured that the oil with a stable output pressure reaches the electro-hydraulic proportional directional valve A101, the electro-hydraulic proportional directional valve B102, and the electro-hydraulic proportional directional valve C103, improving the safety and reliability of the system.

[0078] Embodiment 7

[0079] Based on Embodiment 1, as Figure 1 shown, a shock-resistant pressure gauge 6 is connected to the port P of the electro-hydraulic overflow valve 7.

[0080] In this embodiment, the pressure value at the port P of the electro-hydraulic overflow valve 7 is detected by the shock-resistant pressure gauge 6.

Claims

1. A hoisting hydraulic system with a full-automatic synchronization function, characterized in that, It includes a motor, a working pump, an electromagnetic overflow valve, an electromagnetic proportional direction valve A, an electromagnetic proportional direction valve B, an electromagnetic proportional direction valve C, a synchronous motor, a direction valve A, a direction valve B, a direction valve C, a direction valve D, a direction valve E, a direction valve F, a direction valve G, a direction valve H, a balance valve A, a balance valve B, a balance valve C, a balance valve D, a shuttle valve A, a shuttle valve B, a shuttle valve C, a shuttle valve D, a winch motor A, and a winch motor B; The port A of the electromagnetic proportional direction valve A is connected to the port A of the synchronous motor; the port B1 of the synchronous motor is connected to the port P of the direction valve E, the port A of the direction valve E is connected to the port A of the balance valve C, the port B of the balance valve C is connected to the port B of the winch motor B, the port A of the winch motor B is connected to the port B of the balance valve D, the port A of the balance valve D is connected to the port A of the direction valve H, and the port P of the direction valve H is connected to the port B of the electromagnetic proportional direction valve A; the port B2 of the synchronous motor is connected to the port P of the direction valve A; the port A of the direction valve A is connected to the port A of the balance valve A, the port B of the balance valve A is connected to the port B of the winch motor A; the port A of the winch motor A is connected to the port B of the balance valve B; the port A of the balance valve B is connected to the port A of the direction valve C; the port P of the direction valve C is connected to the port B of the electromagnetic proportional direction valve B; The port A of the electromagnetic proportional direction valve B is connected to the port P of the direction valve B, the port A of the direction valve B is connected to the port A of the balance valve A, the port A of the balance valve A is connected to the port A of the direction valve D, and the port P of the direction valve D is connected to the port B of the electromagnetic proportional direction valve A; The port A of the electromagnetic proportional direction valve C is connected to the port P of the direction valve F, the port A of the direction valve F is connected to the port A of the balance valve C, the port A of the balance valve D is connected to the port A of the direction valve G, and the port P of the direction valve G is connected to the port B of the electromagnetic proportional direction valve C; The intake port P1 of the shuttle valve A is connected to the port P of the direction valve A, the intake port P2 is connected to the port B of the electromagnetic proportional direction valve A, and the outlet port A is respectively connected to the X ports of the direction valve A and the direction valve B; the intake port P1 of the shuttle valve B is connected to the port P of the direction valve E, the intake port P2 is connected to the port B of the electromagnetic proportional direction valve A, and the outlet port A is respectively connected to the X ports of the direction valve E and the direction valve F; The intake port P1 of the shuttle valve C is connected to the port A of the balance valve D, the intake port P2 is connected to the port A of the balance valve C, and the outlet port A is connected to the control end of the winch brake corresponding to the winch motor B; the intake port P1 of the shuttle valve D is connected to the port A of the balance valve B, the intake port P2 is connected to the port A of the balance valve A, and the outlet port A is connected to the control end of the winch brake corresponding to the winch motor A; The ports P of the electromagnetic proportional direction valve A, the electromagnetic proportional direction valve B, and the electromagnetic proportional direction valve C are all connected to the port P of the electromagnetic overflow valve, and the T ports of the electromagnetic proportional direction valve A, the electromagnetic proportional direction valve B, and the electromagnetic proportional direction valve C are connected to the fuel tank; the motor drives the working pump, and the working pump is connected to the ports P of the electromagnetic proportional direction valve A, the electromagnetic proportional direction valve B, and the electromagnetic proportional direction valve C.

2. The lifting hydraulic system with a full-automatic synchronization function according to claim 1, wherein, It further includes a displacement sensor A and a displacement sensor B. The displacement sensor A is used to obtain the ascending and descending distances of the second hoisting mechanism corresponding to the winch motor A, and the displacement sensor B is used to obtain the ascending and descending distances of the first hoisting mechanism corresponding to the winch motor B.

3. The hoisting hydraulic system with a full-automatic synchronization function according to claim 1, characterized in that, It further includes an oil suction filter arranged at the oil suction port of the working pump.

4. A lifting hydraulic system with a full-automatic synchronization function according to claim 1, characterized in that, The T port of the electromagnetic overflow valve is connected with an oil return filter.

5. A hoisting hydraulic system with a full-automatic synchronization function according to claim 1, characterized in that, A high-pressure filter is arranged between the P ports of the electromagnetic proportional directional valve A, the electromagnetic proportional directional valve B, the electromagnetic proportional directional valve C and the working pump.

6. A hoisting hydraulic system with a full-automatic synchronization function according to claim 1, characterized in that, A check valve is arranged between the P ports of the electromagnetic proportional directional valve A, the electromagnetic proportional directional valve B, the electromagnetic proportional directional valve C and the working pump.

7. A hoisting hydraulic system with a full-automatic synchronization function according to claim 1, characterized in that, It further includes a pressure reducing overflow valve A, a pressure reducing overflow valve B and a pressure reducing overflow valve C. The A port of the pressure reducing overflow valve A is connected with the P port of the electromagnetic proportional directional valve A, the A port of the pressure reducing overflow valve B is connected with the P port of the electromagnetic proportional directional valve B, and the A port of the pressure reducing overflow valve C is connected with the P port of the electromagnetic proportional directional valve C. The P ports of the pressure reducing overflow valve A, the pressure reducing overflow valve B and the pressure reducing overflow valve C are all connected with the P port of the electromagnetic overflow valve, and the T ports are all connected with the T port of the electromagnetic overflow valve.

8. A hoisting hydraulic system with a full-automatic synchronization function according to claim 1, characterized in that, The P port of the electromagnetic overflow valve is connected with a shock-resistant pressure gauge.

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