Winding synchronizing system and operation machine

Abstract

The utility model relates to the field of operation machinery, and discloses a winch synchronizing system and operation machinery. The winch synchronization system comprises a first motor and a second motor; the communicating branch is connected between the lifting port of the first motor and the lifting port of the second motor and used for communicating the lifting ports of the first motor and the second motor; and the anti-explosion valve is connected between the communicating branch and the lifting port of the first motor or the lifting port of the second motor, and the anti-explosion valve is closed in the state that the pressure of the port, connected with the first motor or the second motor, of the anti-explosion valve exceeds the pressure of the port, connected with the communicating branch, of the anti-explosion valve and reaches a preset value. The lifting port of the first motor and the lifting port of the second motor can be communicated through the communication branch, and when the first motor and the second motor synchronously rotate, the load pressure of the first motor and the load pressure of the second motor can be consistent, so that the problem that the flow of the first motor and the flow of the second motor are inconsistent due to the load pressure difference is avoided.

Description

Technical Field

[0001] This utility model relates to the field of operating machinery technology, specifically to a winch synchronization system and operating machinery. Background Technology

[0002] In the application of construction machinery such as continuous wall grabs and crawler cranes, dual winch systems are widely used because they can effectively improve work efficiency and load capacity. When performing complex tasks such as deep foundation pit excavation and heavy object hoisting, these types of construction machinery often rely on dual winch systems to simultaneously lift heavy objects, ensuring the stability and safety of the operation.

[0003] However, existing dual-winch systems generally face a critical problem during synchronous lifting: it is difficult to keep the operating speeds of the two winches in sync. This inconsistency can lead to load imbalance, mechanical vibration, or even operational failure, affecting not only work efficiency but also potentially damaging equipment, increasing maintenance costs, and posing safety hazards. Utility Model Content

[0004] In view of this, the present invention provides a winch synchronization system and working machinery to solve or improve the problem that it is difficult to keep the operating speed of two winches in a consistent manner.

[0005] In a first aspect, this utility model provides a hoisting synchronization system, comprising:

[0006] The first motor and the second motor are used to provide power to the corresponding winches, and the first motor and the second motor are driven by a hydraulic drive system.

[0007] A connecting branch is connected between the lifting port of the first motor and the lifting port of the second motor, and can be used to connect the lifting ports of the first motor and the second motor.

[0008] Explosion-proof valves, the two explosion-proof valves are respectively connected between the connecting branch and the lifting port of the first motor, and between the connecting branch and the lifting port of the second motor;

[0009] Specifically, when the pressure at the port where the explosion-proof valve is connected to the first motor or the second motor exceeds the pressure at the port where the explosion-proof valve is connected to the connecting branch by a preset value, the explosion-proof valve closes.

[0010] In one optional embodiment, the explosion-proof valve is a normally open reversing valve, the explosion-proof valve has a connecting working position and a closed working position, the pilot oil port of the connecting working position is connected to the connecting branch, and the pilot oil port of the closed working position is connected to the lifting port of the first motor or the lifting port of the second motor.

[0011] The connecting branch includes a first control valve, which is used to control the connection or disconnection of the lifting ports of the first motor and the second motor.

[0012] In one alternative embodiment, the hoisting synchronization system further includes a check valve and a balance valve, wherein at least one of the first motor and the second motor is connected to the check valve and the balance valve.

[0013] The oil outlet of the one-way valve is connected to the lifting port of the first motor or the second motor, and the oil inlet of the one-way valve is used to connect to the oil pump assembly.

[0014] The balance valve is connected in parallel with the check valve. The balance valve has two pilot ports, one of which is connected to the inlet of the check valve and the other is connected to the return port of the first motor or the second motor.

[0015] The balance valve is a normally closed directional valve, and the balance valve opens when the pilot oil pressure of the balance valve connected to the check valve is less than the pilot oil pressure of the balance valve connected to the return oil port of the first motor or the second motor.

[0016] In one alternative embodiment, the hydraulic drive system includes an oil pump assembly and a control valve group;

[0017] The control valve group is connected to the oil pump assembly, the first motor and the second motor respectively, and is used to guide the oil pumped by the oil pump assembly to the first motor and the second motor.

[0018] In one alternative embodiment, the oil pump assembly includes a first oil pump, and the control valve group includes a first multi-way proportional valve, the first multi-way proportional valve including a first working link and a second working link.

[0019] The first working link is connected to the first oil pump, the first motor and the second working link respectively, and is used to distribute the oil pumped by the first oil pump to the first motor and the second working link.

[0020] The second working link is connected to the second motor and is used to regulate the flow rate of oil entering the second motor.

[0021] In one alternative embodiment, the oil pump assembly further includes a second oil pump, and the control valve group further includes a second multi-way proportional valve, the second multi-way proportional valve including a third working link and a fourth working link;

[0022] The third working link is connected to the second oil pump, the first motor and the fourth working link respectively, and is used to distribute the oil pumped by the second oil pump to the first motor and the fourth working link.

[0023] The fourth working link is connected to the second motor and is used to regulate the flow rate of oil entering the second motor.

[0024] In one optional embodiment, the control valve assembly further includes:

[0025] The first lifting pilot valve is connected to the first working link and the third working link respectively, and is used to control the first working link and the third working link to move in the direction of lifting the first motor;

[0026] The first lowering pilot valve is connected to the first working link and the third working link respectively, and is used to control the first working link and the third working link to move in the direction of lowering the first motor;

[0027] The second lifting pilot valve is connected to the second working link and the fourth working link respectively, and is used to control the second working link and the fourth working link to move in the direction of lifting the second motor;

[0028] The second lowering pilot valve is connected to the second working link and the fourth working link respectively, and is used to control the second working link and the fourth working link to move in the direction of lowering the second motor;

[0029] The starting pressure of the first working link is less than that of the third working link, and the starting pressure of the second working link is less than that of the fourth working link.

[0030] In one optional embodiment, the control valve assembly further includes:

[0031] A shuttle valve, wherein one oil inlet of the shuttle valve is connected between the first working link and the lifting port of the first motor, and the other oil inlet of the shuttle valve is connected between the second working link and the return port of the first motor;

[0032] The compensating valve has an inlet connected to the inlet of the first working link and an outlet connected to the inlet of the second working link. The compensating valve has a first pilot port and a second pilot port, with the first pilot port connected to the inlet of the compensating valve and the second pilot port connected to the outlet of the shuttle valve. The opening degree of the compensating valve is positively related to the pressure difference between the first pilot port and the second pilot port.

[0033] In one optional embodiment, the control valve assembly further includes a relief valve, the inlet of which is connected between the first working link and the first oil pump, and the outlet of which is connected to the oil tank.

[0034] Secondly, this utility model also provides a working machine, including the hoisting synchronization system described above.

[0035] The hoisting synchronization system provided by this utility model can connect the lifting port of the first motor and the lifting port of the second motor through a connecting branch. When the first motor and the second motor rotate synchronously, the load pressure of the first motor and the second motor can be made consistent, thereby avoiding the problem of inconsistent flow of the first motor and the second motor caused by load pressure difference.

[0036] In addition, by connecting the explosion-proof valve between the connecting branch and the first motor or the second motor, when the connecting branch bursts, the oil pressure in the connecting branch is zero. However, under the resistance of the explosion-proof valve, the oil pressure at the lifting port of the first motor or the second motor is greater than zero. Furthermore, when the pressure difference across the explosion-proof valve reaches a preset value, the explosion-proof valve closes. This can prevent the first motor or the second motor from leaking oil through the connecting branch, thus avoiding the problem of heavy objects falling on their own and oil contamination.

[0037] The working machinery provided by this utility model includes the hoisting synchronization system provided by this utility model, and therefore also includes all the advantages of the hoisting synchronization system mentioned above. Attached Figure Description

[0038] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0039] Figure 1 A schematic diagram of the hoisting synchronization system provided in this embodiment of the utility model;

[0040] Figure 2 A schematic diagram illustrating the principle of the first motor and the second motor being connected via a connecting branch in an embodiment of this utility model;

[0041] Figure 3 This is a schematic diagram of the control valve assembly provided in an embodiment of the present invention.

[0042] Explanation of reference numerals in the attached figures:

[0043] 1. First motor; 101. Lifting port; 102. Oil return port; 2. Second motor; 3. Connecting branch; 301. First control valve; 4. Explosion-proof valve; 401. Connecting working position; 402. Closing working position; 5. Oil pump assembly; 501. First oil pump; 502. Second oil pump; 6. Control valve group; 601. First multi-way proportional valve; 6011. First working link; 6012. Second working link; 602. Second multi-way proportional valve; 6021. Third working link; 6022. Fourth working link; 603. First lifting pilot valve; 604. First lowering pilot valve; 605. Second lifting pilot valve; 606. Second lowering pilot valve; 607. Shuttle valve; 608. Compensating valve; 609. Relief valve; 7. Check valve; 8. Balance valve. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0045] Existing dual-winch systems consist of two winches, each connected to the load via ropes and hooks. However, a critical problem commonly encountered during synchronous lifting is the difficulty in maintaining consistent operating speeds between the two winches. This inconsistency can lead to load misalignment, mechanical vibration, or even operational failure, impacting work efficiency, potentially damaging equipment, increasing maintenance costs, and posing safety hazards.

[0046] The inconsistency in the operating speeds of the two winches is mainly due to the inconsistent flow rates of hydraulic oil through the motors driving them. The different load pressures of the two winch motors are also a significant factor affecting this inconsistency. The winch synchronization system provided in this embodiment aims to ensure that the load pressures of the two winch motors are consistent, thereby reducing the impact of load pressure on the inconsistent flow rates.

[0047] The following is combined with Figures 1 to 3 This describes the hoisting synchronization system provided in the embodiments of the present invention.

[0048] Specifically, the hoisting synchronization system includes a first motor 1, a second motor 2, a connecting branch 3, and an explosion-proof valve 4.

[0049] The first motor 1 and the second motor 2 are used to provide power to their respective winches. For example, the output shafts of the first motor 1 and the second motor 2 are mechanically connected to the winch drum via a key and are used to drive the drum to rotate.

[0050] The first motor 1 and the second motor 2 are driven by a hydraulic drive system, that is, the hydraulic drive system is used to provide oil to the first motor 1 and the second motor 2 and drive the first motor 1 and the second motor 2 to rotate.

[0051] The connecting branch 3 is connected between the lifting port 101 of the first motor 1 and the lifting port 101 of the second motor 2, and the connecting branch 3 is used to connect the lifting port 101 of the first motor 1 and the lifting port 101 of the second motor 2 so that the load pressure of the first motor 1 and the second motor 2 is the same. It can be understood that the lifting port 101 is the oil inlet of the first motor 1 or the second motor 2. When oil enters from the lifting port 101, the first motor 1 or the second motor 2 drives the corresponding winch to rotate to lift the heavy object.

[0052] There are two explosion-proof valves 4. The two explosion-proof valves 4 are respectively connected between the connecting branch 3 and the lifting port 101 of the first motor 1, and between the connecting branch 3 and the lifting port 101 of the second motor 2. In other words, the lifting port 101 of the first motor 1 and the connecting branch 3 are connected by the corresponding explosion-proof valves 4, and the lifting port 101 of the second motor 2 and the connecting branch 3 are also connected by the corresponding explosion-proof valves 4.

[0053] When the pressure at the port where the explosion-proof valve 4 is connected to the first motor 1 or the second motor 2 exceeds the pressure at the port where the explosion-proof valve 4 is connected to the connecting branch 3 by a preset value, the explosion-proof valve 4 closes.

[0054] In this embodiment, the lifting port 101 of the first motor 1 and the lifting port 101 of the second motor 2 can be connected through the connecting branch 3. When the first motor 1 and the second motor 2 rotate synchronously, the load pressure of the first motor 1 and the second motor 2 can be made consistent, thereby avoiding the problem of inconsistent flow rates of the first motor 1 and the second motor 2 due to load pressure differences.

[0055] In addition, by connecting the explosion-proof valve 4 between the connecting branch 3 and the first motor 1 or the second motor 2, when the connecting branch 3 bursts, the oil pressure in the connecting branch 3 is zero. Under the resistance of the explosion-proof valve 4, the oil pressure at the lifting port 101 of the first motor 1 or the second motor 2 is greater than zero. When the pressure difference between the two ends of the explosion-proof valve 4 reaches the preset value, the explosion-proof valve 4 closes. This can prevent the first motor 1 or the second motor 2 from leaking oil through the connecting branch 3, thus avoiding the problem of heavy objects falling on their own and oil contamination.

[0056] refer to Figure 2As shown, in some embodiments provided by this utility model, the explosion-proof valve 4 is a normally open reversing valve. The explosion-proof valve 4 has a connected working position 401 and a closed working position 402. The closed working position 402 is the normal working position of the explosion-proof valve 4. Optionally, the explosion-proof valve 4 can be held in the closed working position 402 under the action of a spring.

[0057] When the explosion-proof valve 4 is switched to the closed operating position 402, the connecting branch 3 is disconnected from the first motor 1 or the second motor 2. When the explosion-proof valve 4 is switched to the connected operating position 401, the connecting branch 3 is connected to the first motor 1 or the second motor 2 through the throttling channel inside the explosion-proof valve 4.

[0058] The pilot oil port of the connecting working position 401 is connected to the connecting branch 3, and the pilot oil port of the closed working position 402 is connected to the lifting port 101 of the first motor 1 or the lifting port 101 of the second motor 2.

[0059] In this embodiment, when the connecting branch 3 is normally connected to the first motor 1 and the second motor 2, the pressure of the oil inlet and outlet of the explosion-proof valve 4 is the same, that is, the oil pressure of the pilot oil port of the connected working position 401 and the closed working position 402 is the same, so the explosion-proof valve 4 is kept in the closed working position 402.

[0060] When connecting branch 3 bursts, the pressure in connecting branch 3 is zero, therefore the pressure at the pilot port of connecting working position 401 is zero. Under the resistance of explosion-proof valve 4, the oil pressure at the lifting port 101 of the first motor 1 or the second motor 2 is greater than zero. Therefore, the pressure at the pilot port of closing working position 402 exceeds the pressure at the pilot port of connecting working position 401, thereby driving explosion-proof valve 4 to close under the pressure difference between the two pilot ports of explosion-proof valve 4, preventing the first motor 1 or the second motor 2 from leaking oil through connecting branch 3.

[0061] With this configuration, the explosion-proof valve 4 can automatically close under the pressure difference between the two pilot ports, making control simple, response rapid, and reliability higher.

[0062] It is understandable that when the thrust generated by the pressure difference between the pilot port of the closed working position 402 and the pilot port of the connected working position 401 is greater than the spring force of the explosion-proof valve 4, the explosion-proof valve 4 will close. Accordingly, the preset value discussed above can be calculated based on the spring force.

[0063] Of course, the explosion-proof valve 4 is not limited to the above-described embodiments. For example, in some embodiments not shown, the explosion-proof valve 4 is configured as an electromagnetic directional valve.

[0064] Furthermore, the oil port of the explosion-proof valve 4 connected to the first motor 1 or the second motor 2 is equipped with a first pressure detection device, and the oil port of the explosion-proof valve 4 connected to the connecting branch 3 is equipped with a second pressure detection device. The explosion-proof valve, the first pressure detection device, and the second pressure detection device are all electrically connected to the control system.

[0065] When the difference between the pressure value detected by the first pressure detection device and the pressure value detected by the second pressure detection device exceeds a preset value, the control system controls the explosion-proof valve 4 to close. The preset value can be set according to actual needs.

[0066] In some embodiments provided by this utility model, the connecting branch 3 includes a first control valve 301, which is used to control the connection or disconnection of the lifting ports 101 of the first motor 1 and the second motor 2.

[0067] In this embodiment, when the first motor 1 and the second motor 2 need to operate synchronously, the first control valve 301 can be opened to connect the lift ports 101 of both the first motor 1 and the second motor 2. When it is necessary to independently control the operation of either the first motor 1 or the second motor 2, the first control valve 301 can be closed to disconnect the lift ports 101 of both the first motor 1 and the second motor 2, thus preventing the first motor 1 and the second motor 2 from interfering with each other.

[0068] This configuration allows for easy switching of the on / off state of the connecting branch 3 as needed, making the hoisting synchronization system more flexible and convenient to use, and adaptable to a wider range of application scenarios.

[0069] Optionally, the first control valve 301 is configured as a solenoid directional valve, a hydraulic directional valve, or a manual directional valve.

[0070] In some embodiments provided by this utility model, the hoisting synchronization system further includes a one-way valve 7 and a balance valve 8. At least one of the first motor 1 and the second motor 2 is connected to the one-way valve 7 and the balance valve 8. (See reference) Figure 2 The illustration shows an example where both the first motor 1 and the second motor 2 are connected to corresponding check valves 7 and balance valves 8.

[0071] The oil outlet of the one-way valve 7 is connected to the lifting port 101 of the first motor 1 or the second motor 2, and the oil inlet of the one-way valve 7 is used to connect to the oil pump assembly 5. That is, the oil provided by the oil pump assembly 5 can enter the first motor 1 or the second motor 2 through the one-way valve 7.

[0072] The balance valve 8 is connected in parallel with the check valve 7. The balance valve 8 has two pilot ports, one of which is connected to the inlet of the check valve 7, and the other pilot port is connected to the return port 102 of the first motor 1 or the second motor 2. It should be noted that the return port 102 refers to the port through which the first motor 1 or the second motor 2 connects to the oil tank during the hoisting process of lifting heavy objects.

[0073] The balance valve 8 is a normally closed directional valve. For example, the balance valve 8 can remain normally closed under the action of a spring. When the pilot oil pressure of the balance valve 8 connected to the check valve 7 is less than the pilot oil pressure of the balance valve 8 connected to the return oil port 102 of the first motor 1 or the second motor 2, the balance valve 8 opens.

[0074] In this embodiment, when the hoist lifts a heavy object, the pilot oil port pressure connected to the balance valve 8 and the check valve 7 is greater than the pilot oil port pressure connected to the balance valve 8 and the return oil port 102. The balance valve 8 remains closed, and the oil enters the lifting port 101 of the first motor 1 or the second motor 2 through the check valve 7, and flows back to the oil tank through the return oil port 102 of the first motor 1 or the second motor 2, thereby driving the first motor 1 or the second motor 2 to rotate.

[0075] When the hoist lowers the heavy object, the oil supplied by the oil pump assembly 5 enters the return port 102 of the first motor 1 or the second motor 2. At this time, the pilot oil port pressure of the balance valve 8 connected to the return port 102 of the first motor 1 or the second motor 2 is greater than the pilot oil port pressure of the balance valve 8 connected to the check valve 7, thereby driving the balance valve 8 to open, so that the oil discharged from the lifting port 101 of the first motor 1 or the second motor 2 flows back to the oil tank through the balance valve 8.

[0076] With this configuration, if the oil pump assembly 5 stops supplying oil when the winch lowers a heavy object, or if the oil supply line leaks due to a malfunction, the pilot oil pressure connected to the balance valve 8 and the return oil port 102 will decrease, causing the balance valve 8 to close. This can prevent the heavy object on the winch from falling further and improve stability.

[0077] In some embodiments provided by this utility model, the hydraulic drive system includes an oil pump assembly 5 and a control valve group 6.

[0078] The control valve assembly 6 is connected to the oil pump assembly 5, the first motor 1, and the second motor 2, respectively, and is used to guide the oil pumped by the oil pump assembly 5 to the first motor 1 and the second motor 2. It can be understood that the control valve assembly 6 guides the oil to the first motor 1 or the second motor 2 to drive the first motor 1 or the second motor 2 to rotate forward or backward, or to adjust the speed of the first motor 1 or the second motor 2.

[0079] In some embodiments provided by this utility model, the oil pump assembly 5 includes a first oil pump 501. The control valve assembly 6 includes a first multi-way proportional valve 601, which includes a first working link 6011 and a second working link 6012.

[0080] The first working link 6011 is connected to the first oil pump 501, the first motor 1 and the second working link 6012 respectively, and is used to distribute the oil pumped by the first oil pump 501 to the first motor 1 and the second working link 6012.

[0081] The second working link 6012 is connected to the second motor 2 and is used to regulate the flow rate of oil entering the second motor 2. For example, the second working link 6012 distributes the oil guided by the first working link 6011 to the second motor 2 and the oil tank. That is, the second working link 6012 is responsible for regulating the flow rate of oil entering the second motor 2 and returning excess oil to the oil tank.

[0082] In this embodiment, the first working link 6011 and the second working link 6012 are connected in series. The oil pumped by the first oil pump 501 enters the first working link 6011 and is distributed to the first motor 1 and the second working link 6012. The oil entering the first motor 1 can be used to drive the first motor 1 to rotate, while the oil entering the second working link 6012 is regulated by the second working link 6012 and then enters the second motor 2 to drive the second motor 2 to rotate.

[0083] With this configuration, by adjusting the position of the proportional valve core in the first working link 6011, the amount of oil flowing into the first motor 1 can be precisely controlled. Simultaneously, the remaining oil is guided to the second working link 6012. By adjusting the position of the proportional valve core in the second working link 6012, the amount of oil entering the second motor 2 can be precisely controlled, ensuring that its flow rate is consistent with that of the first motor 1.

[0084] Since the first working link 6011 and the second working link 6012 are connected in series, the total flow of the first oil pump 501 is first distributed by the first working link 6011 and then further regulated by the second working link 6012. This series structure makes the flow distribution between the two working links more coordinated.

[0085] Optionally, refer to Figure 3 As shown, the first working link 6011 has three working positions, for example, the three working positions are arranged from top to bottom in the figure.

[0086] In the first working position, the first working link 6011 connects the oil return port 102 of the first motor 1 to the first oil pump 501, and simultaneously connects the lifting port 101 of the first motor 1 to the oil tank, so that the first motor 1 rotates in reverse. In the second working position, the first oil pump 501 is connected to the second working link 6012. In the third working position, the first working link 6011 connects the lifting port 101 of the first motor 1 to the first oil pump 501, and simultaneously connects the oil return port 102 of the first motor 1 to the oil tank, so that the first motor 1 rotates in forward.

[0087] Optionally, refer to Figure 3 As shown, the second working link 6012 has three working positions, for example, the three working positions are arranged from top to bottom in the figure.

[0088] In the first working position, the second working link 6012 connects the oil return port 102 of the second motor 2 to the first working link 6011, and simultaneously connects the lifting port 101 of the second motor 2 to the oil tank, causing the second motor 2 to rotate in reverse. In the second working position, the second working link 6012 connects the first working link 6011 to the oil tank. In the third working position, the second working link 6012 connects the lifting port 101 of the second motor 2 to the first working link 6011, and simultaneously connects the oil return port 102 of the second motor 2 to the oil tank, causing the second motor 2 to rotate in forward.

[0089] In some embodiments provided by this utility model, the oil pump assembly 5 includes a second oil pump 502. The control valve assembly 6 includes a second multi-way proportional valve 602, which includes a third working link 6021 and a fourth working link 6022.

[0090] The third working link 6021 is connected to the second oil pump 502, the first motor 1 and the fourth working link 6022 respectively, and is used to distribute the oil pumped by the second oil pump 502 to the first motor 1 and the fourth working link 6022.

[0091] The fourth working link 6022 is connected to the second motor 2 and is used to regulate the flow rate of oil entering the second motor 2. For example, the fourth working link 6022 distributes the oil guided by the third working link 6021 to the second motor 2 and the oil tank. That is, the fourth working link 6022 is responsible for regulating the flow rate of oil entering the second motor 2 and returning excess oil to the oil tank.

[0092] In this embodiment, the third working link 6021 and the fourth working link 6022 are connected in series. The oil pumped by the second oil pump 502 enters the third working link 6021 and is distributed to the first motor 1 and the fourth working link 6022 through the third working link 6021. The oil entering the first motor 1 can be used to drive the first motor 1 to rotate, and the oil entering the fourth working link 6022 is regulated by the fourth working link 6022 and then enters the second motor 2 to drive the second motor 2 to rotate.

[0093] With this configuration, by adjusting the position of the proportional valve core in the third working link 6021, the amount of oil flowing into the first motor 1 can be precisely controlled. Simultaneously, the remaining oil is guided to the fourth working link 6022. By adjusting the position of the proportional valve core in the fourth working link 6022, the amount of oil entering the second motor 2 can be precisely controlled, ensuring that its flow rate is consistent with that of the first motor 1.

[0094] Since the third working link 6021 and the fourth working link 6022 are connected in series, the total flow of the second oil pump 502 is first distributed by the third working link 6021 and then further regulated by the fourth working link 6022. This series structure makes the flow distribution between the two working links more coordinated.

[0095] In addition, the first multi-way proportional valve 601 and the second multi-way proportional valve 602 can be used together, wherein the first multi-way proportional valve 601 is a one-speed valve and the second multi-way proportional valve 602 is a two-speed valve.

[0096] Specifically, when the first motor 1 and the second motor 2 need to run at a first speed, the oil pumped by the first oil pump 501 is guided to the first motor 1 and the second motor 2 through the first working link 6011 and the second working link 6012 of the first multi-way proportional valve 601.

[0097] When the first motor 1 and the second motor 2 need to operate at a second speed, with the first multi-way proportional valve 601 open, the oil pumped by the second oil pump 502 is further guided to the first motor 1 and the second motor 2 through the third working link 6021 and the fourth working link 6022 of the second multi-way proportional valve 602. That is, the first oil pump 501 and the second oil pump 502 jointly drive the first motor 1 and the second motor 2, thereby further increasing the flow rate of the first motor 1 and the second motor 2, and thus increasing the rotational speed of the first motor 1 and the second motor 2. The second speed is greater than the first speed.

[0098] Optionally, refer to Figure 3 As shown, the third working link 6021 has three working positions, for example, the three working positions are arranged from top to bottom in the figure.

[0099] In the first working position, the third working link 6021 connects the return port 102 of the first motor 1 to the second oil pump 502, and simultaneously connects the lift port 101 of the first motor 1 to the oil tank, so that the first motor 1 rotates in reverse. In the second working position, the third working link 6021 connects the second oil pump 502 to the fourth working link 6022. In the third working position, the third working link 6021 connects the lift port 101 of the first motor 1 to the second oil pump 502, and simultaneously connects the return port 102 of the first motor 1 to the oil tank, so that the first motor 1 rotates in forward.

[0100] Optionally, refer to Figure 3 As shown, the fourth working link 6022 has three working positions, for example, the three working positions are arranged from top to bottom in the figure.

[0101] In one working position, the fourth working link 6022 connects the oil return port 102 of the second motor 2 to the third working link 6021, and simultaneously connects the lifting port 101 of the second motor 2 to the oil tank, causing the second motor 2 to rotate in reverse. In the second working position, the fourth working link 6022 connects the third working link 6021 to the oil tank. In the third working position, the fourth working link 6022 connects the lifting port 101 of the second motor 2 to the third working link 6021, and simultaneously connects the oil return port 102 of the second motor 2 to the oil tank, causing the second motor 2 to rotate in forward.

[0102] In some embodiments provided by this utility model, the control valve group 6 further includes a first lift pilot valve 603, a first lower pilot valve 604, a second lift pilot valve 605, and a second lower pilot valve 606.

[0103] The first lift pilot valve 603 is connected to both the first working link 6011 and the third working link 6021, and is used to control the first working link 6011 and the third working link 6021 to move in the direction of lifting the first motor 1. For example, the first lift pilot valve 603 is connected to the lift pilot port of the first working link 6011 and the lift pilot port of the third working link 6021.

[0104] The first lowering pilot valve 604 is connected to the first working link 6011 and the third working link 6021 respectively, and is used to control the first working link 6011 and the third working link 6021 to move in the direction of lowering the first motor 1. For example, the first lowering pilot valve 604 is connected to the lowering pilot port of the first working link 6011 and the lowering pilot port of the third working link 6021.

[0105] The second lift pilot valve 605 is connected to the second working link 6012 and the fourth working link 6022 respectively, and is used to control the second working link 6012 and the fourth working link 6022 to move in the direction of lifting the second motor 2. For example, the second lift pilot valve 605 is connected to the lift pilot port of the second working link 6012 and the lift pilot port of the fourth working link 6022.

[0106] The second lowering pilot valve 606 is connected to the second working link 6012 and the fourth working link 6022 respectively, and is used to control the second working link 6012 and the fourth working link 6022 to move in the direction of lowering the second motor 2. For example, the second lowering pilot valve 606 is connected to the lowering pilot port of the second working link 6012 and the lowering pilot port of the fourth working link 6022.

[0107] The starting pressure of the first working link 6011 is less than that of the third working link 6021.

[0108] Specifically, the starting pressure of the first working link 6011 refers to the minimum pressure required for the first working link 6011 to start operating and supply oil to the first motor 1. Similarly, the starting pressure of the third working link 6021 refers to the minimum pressure required for the third working link 6021 to start operating and supply oil to the first motor 1.

[0109] The starting pressure of the second working link 6012 is less than the starting pressure of the fourth working link 6022.

[0110] Specifically, the starting pressure of the second working link 6012 refers to the minimum pressure required for the second working link 6012 to start operating and supply oil to the second motor 2. Similarly, the starting pressure of the fourth working link 6022 refers to the minimum pressure required for the fourth working link 6022 to start operating and supply oil to the second motor 2.

[0111] In this embodiment, when the first motor 1 needs to be lifted, the first lifting pilot valve 603 can be operated. Since the first lifting pilot valve 603 is connected to both the first working link 6011 and the third working link 6021, the first lifting pilot valve 603 can control both the first working link 6011 and the third working link 6021 at the same time, making the operation more convenient.

[0112] Furthermore, since the opening pressure of the first working link 6011 is lower than the opening pressure of the third working link 6021, for example, when the first lift pilot valve 603 outputs the first pilot pressure, the first working link 6011 opens; when the first lift pilot valve 603 outputs the second pilot pressure, both the first working link 6011 and the third working link 6021 open, thereby increasing the speed of the first motor 1. The first pilot pressure is lower than the second pilot pressure. Thus, the first lift pilot valve 603 can control the lifting speed of the first motor 1.

[0113] When the first motor 1 needs to be lowered, the first lowering pilot valve 604 can be operated. Since the first lowering pilot valve 604 is connected to both the first working link 6011 and the third working link 6021, the first lowering pilot valve 604 can control both the first working link 6011 and the third working link 6021 at the same time, making the operation more convenient.

[0114] Furthermore, since the opening pressure of the first working link 6011 is lower than the opening pressure of the third working link 6021, for example, when the first lowering pilot valve 604 outputs the first pilot pressure, the first working link 6011 opens; when the first lowering pilot valve 604 outputs the second pilot pressure, both the first working link 6011 and the third working link 6021 open, thereby increasing the speed of the first motor 1. The first pilot pressure is lower than the second pilot pressure. Thus, the first lowering pilot valve 604 can control the lowering speed of the first motor 1.

[0115] When the second motor 2 needs to be lifted, the second lifting pilot valve 605 can be operated. Since the second lifting pilot valve 605 is connected to both the second working link 6012 and the fourth working link 6022, the second lifting pilot valve 605 can control both the second working link 6012 and the fourth working link 6022 at the same time, making the operation more convenient.

[0116] Furthermore, since the opening pressure of the second working link 6012 is lower than the opening pressure of the fourth working link 6022, for example, when the second lift pilot valve 605 outputs the first pilot pressure, the second working link 6012 opens; when the second lift pilot valve 605 outputs the second pilot pressure, both the second working link 6012 and the fourth working link 6022 open, thereby increasing the speed of the second motor 2. The first pilot pressure is lower than the second pilot pressure. Thus, the second lift pilot valve 605 can control the lifting speed of the second motor 2.

[0117] When the second motor 2 needs to be lowered, the second lowering pilot valve 606 can be operated. Since the second lowering pilot valve 606 is connected to both the second working link 6012 and the fourth working link 6022, the second lowering pilot valve 606 can control both the second working link 6012 and the fourth working link 6022 at the same time, making the operation more convenient.

[0118] Furthermore, since the opening pressure of the second working link 6012 is lower than the opening pressure of the fourth working link 6022, for example, when the second lowering pilot valve 606 outputs the first pilot pressure, the second working link 6012 opens; when the second lowering pilot valve 606 outputs the second pilot pressure, both the second working link 6012 and the fourth working link 6022 open, thereby increasing the speed of the second motor 2. The first pilot pressure is lower than the second pilot pressure. Thus, the second lowering pilot valve 606 can control the lowering speed of the second motor 2.

[0119] In some embodiments provided by this utility model, the control valve assembly 6 further includes a shuttle valve 607 and a compensation valve 608.

[0120] One oil inlet of the shuttle valve 607 is connected between the first working link 6011 and the lifting port 101 of the first motor 1, and the other oil inlet of the shuttle valve 607 is connected between the second working link 6012 and the return port 102 of the first motor 1.

[0121] The inlet of the compensating valve 608 is connected to the inlet of the first working connection 6011, and the outlet of the compensating valve 608 is connected to the inlet of the second working connection 6012. The compensating valve 608 has a first pilot port and a second pilot port, with the first pilot port connected to the inlet of the compensating valve 608 and the second pilot port connected to the outlet of the shuttle valve 607. The opening degree of the compensating valve 608 is directly related to the pressure difference between the first pilot port and the second pilot port; that is, the greater the pressure difference between the first pilot port and the second pilot port, the greater the opening degree of the compensating valve 608.

[0122] In this embodiment, by setting the shuttle valve 607, when the first working link 6011 controls the first motor 1 to rotate forward or reverse, the load pressure of the first motor 1 can be fed back to the second pilot port of the compensation valve 608 through the shuttle valve 607.

[0123] By setting up a compensation valve 608, with its first pilot port connected to its inlet and its second pilot port connected to the outlet of the shuttle valve 607, the opening of the compensation valve 608 increases when the pressure difference between the inlet and outlet of the first working link 6011 increases, and decreases when the pressure difference decreases. This keeps the pressure difference between the inlet and outlet of the first working link 6011 constant, reducing the impact of the pressure difference on the flow rate of the first working link 6011, and making the flow rate of the first working link 6011 correspond more accurately to the position of the valve core.

[0124] Furthermore, the second working link 6012, the third working link 6021, or the fourth working link 6022 can also be equipped with corresponding shuttle valves 607 and compensating valves 608, with an arrangement similar to that of the first working link 6011, which will not be described in detail here.

[0125] In some embodiments provided by this utility model, the hoisting synchronization system further includes a control system, a display device, and a speed sensor.

[0126] The system includes at least two speed sensors. Both the first motor 1 and the second motor 2 are equipped with corresponding speed sensors. The speed sensors and the display device are electrically connected to the control system. The speed sensors are used to detect the speed value of the first motor 1 or the second motor 2, and the display device is used to display the speed value detected by the speed sensors.

[0127] In some embodiments provided by this utility model, the hoisting synchronization system further includes a control system, a display device, and a pressure sensor.

[0128] The system includes at least four pressure sensors. Pressure sensors are installed at the ports of the first, second, third, and fourth working links that connect to the lifting port. These pressure sensors are used to detect the pressure values ​​output by the first, second, third, and fourth working links.

[0129] Both the pressure sensor and the display device are electrically connected to the control system. The display device is used to display the pressure value detected by the pressure sensor.

[0130] In some embodiments provided by this utility model, the control valve assembly 6 further includes an overflow valve 609.

[0131] The oil inlet of the overflow valve 609 is connected between the first working link 6011 and the first oil pump 501, and the oil outlet of the overflow valve 609 is connected to the oil tank.

[0132] In this embodiment, when the pressure of the first multi-way proportional valve 601 is too high, the relief valve 609 can be opened to release pressure, thereby avoiding the problem of the first multi-way proportional valve 601 being damaged due to excessive pressure.

[0133] This utility model also provides a working machine.

[0134] Specifically, the operating machinery includes the hoisting synchronization system mentioned above.

[0135] It should be noted that the operating machinery includes the winch synchronization system and therefore also includes all the advantages of the winch synchronization system mentioned above.

[0136] The operating machinery includes, but is not limited to, continuous wall grabs and crawler cranes.

[0137] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A hoisting synchronization system, characterized in that, include: The first motor (1) and the second motor (2) are used to provide power to the corresponding winches, respectively. The first motor (1) and the second motor (2) are driven by a hydraulic drive system. The connecting branch (3) is connected between the lifting port (101) of the first motor (1) and the lifting port (101) of the second motor (2), and can be used to connect the lifting ports (101) of the first motor (1) and the second motor (2). Explosion-proof valve (4), the two explosion-proof valves (4) are respectively connected between the connecting branch (3) and the lifting port (101) of the first motor (1), and between the connecting branch (3) and the lifting port (101) of the second motor (2); When the pressure at the port where the explosion-proof valve (4) is connected to the first motor (1) or the second motor (2) exceeds the pressure at the port where the explosion-proof valve (4) is connected to the connecting branch (3) by a preset value, the explosion-proof valve (4) is closed.

2. The hoisting synchronization system according to claim 1, characterized in that, The explosion-proof valve (4) is a normally open reversing valve. The explosion-proof valve (4) has a connecting working position (401) and a closed working position (402). The pilot oil port of the connecting working position (401) is connected to the connecting branch (3). The pilot oil port of the closed working position (402) is connected to the lifting port (101) of the first motor (1) or the lifting port (101) of the second motor (2). The connecting branch (3) includes a first control valve (301), which is used to control the connection or disconnection of the lifting ports (101) of the first motor (1) and the second motor (2).

3. The hoisting synchronization system according to claim 1, characterized in that, The hoisting synchronization system also includes a one-way valve (7) and a balance valve (8), and at least one of the first motor (1) and the second motor (2) is connected to the one-way valve (7) and the balance valve (8); The oil outlet of the one-way valve (7) is connected to the lifting port (101) of the first motor (1) or the second motor (2), and the oil inlet of the one-way valve (7) is used to connect to the oil pump assembly (5). The balance valve (8) is connected in parallel with the check valve (7). The balance valve (8) has two pilot ports, one of which is connected to the inlet of the check valve (7), and the other is connected to the return port (102) of the first motor (1) or the second motor (2). The balance valve (8) is a normally closed directional valve, and the balance valve (8) opens when the pilot oil pressure of the balance valve (8) connected to the check valve (7) is less than the pilot oil pressure of the balance valve (8) connected to the return oil port (102) of the first motor (1) or the second motor (2).

4. The hoisting synchronization system according to any one of claims 1-3, characterized in that, The hydraulic drive system includes an oil pump assembly (5) and a control valve assembly (6); The control valve group (6) is connected to the oil pump assembly (5), the first motor (1) and the second motor (2) respectively, and is used to guide the oil pumped by the oil pump assembly (5) to the first motor (1) and the second motor (2).

5. The hoisting synchronization system according to claim 4, characterized in that, The oil pump assembly (5) includes a first oil pump (501), and the control valve group (6) includes a first multi-way proportional valve (601), which includes a first working link (6011) and a second working link (6012). The first working link (6011) is connected to the first oil pump (501), the first motor (1) and the second working link (6012) respectively, and is used to distribute the oil pumped by the first oil pump (501) to the first motor (1) and the second working link (6012). The second working link (6012) is connected to the second motor (2) and is used to regulate the flow rate of oil entering the second motor (2).

6. The hoisting synchronization system according to claim 5, characterized in that, The oil pump assembly (5) further includes a second oil pump (502), and the control valve group (6) further includes a second multi-way proportional valve (602), which includes a third working link (6021) and a fourth working link (6022). The third working link (6021) is connected to the second oil pump (502), the first motor (1) and the fourth working link (6022) respectively, and is used to distribute the oil pumped by the second oil pump (502) to the first motor (1) and the fourth working link (6022); The fourth working link (6022) is connected to the second motor (2) and is used to regulate the flow rate of oil entering the second motor (2).

7. The hoisting synchronization system according to claim 6, characterized in that, The control valve assembly (6) also includes: The first lifting pilot valve (603) is connected to the first working link (6011) and the third working link (6021) respectively, and is used to control the first working link (6011) and the third working link (6021) to move in the direction of lifting the first motor (1); The first lowering pilot valve (604) is connected to the first working link (6011) and the third working link (6021) respectively, and is used to control the first working link (6011) and the third working link (6021) to move in the direction of lowering the first motor (1); The second lifting pilot valve (605) is connected to the second working link (6012) and the fourth working link (6022) respectively, and is used to control the second working link (6012) and the fourth working link (6022) to move in the direction of lifting the second motor (2); The second lowering pilot valve (606) is connected to the second working link (6012) and the fourth working link (6022) respectively, and is used to control the second working link (6012) and the fourth working link (6022) to move in the direction of lowering the second motor (2); The starting pressure of the first working link (6011) is less than that of the third working link (6021), and the starting pressure of the second working link (6012) is less than that of the fourth working link (6022).

8. The hoisting synchronization system according to claim 6, characterized in that, The control valve assembly (6) also includes: A shuttle valve (607) has one oil inlet connected between the first working link (6011) and the lifting port (101) of the first motor (1), and the other oil inlet connected between the second working link (6012) and the return port (102) of the first motor (1). The compensating valve (608) has an inlet connected to the inlet of the first working link (6011) and an outlet connected to the inlet of the second working link (6012). The compensating valve (608) has a first pilot port and a second pilot port. The first pilot port is connected to the inlet of the compensating valve (608), and the second pilot port is connected to the outlet of the shuttle valve (607). The opening degree of the compensating valve (608) is positively related to the pressure difference between the first pilot port and the second pilot port.

9. The hoisting synchronization system according to claim 5, characterized in that, The control valve group (6) also includes an overflow valve (609), the oil inlet of which is connected between the first working link (6011) and the first oil pump (501), and the oil outlet of which is connected to the oil tank.

10. A type of operating machinery, characterized in that, Including the hoisting synchronization system as described in any one of claims 1-9.

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