Emergency equipment and cranes

Abstract

This invention relates to the field of crane technology and discloses an emergency device and a crane. The emergency device includes: a drive unit having a drive unit driven by an external power source, the oil inlet of the drive unit being connected to the hydraulic oil source of the crane; and a diversion unit having an oil inlet, an oil return port, and multiple oil outlets, the oil inlet being connected to the oil outlet of the drive unit, and the oil inlet being connected to the oil return port and the oil outlets respectively through a hydraulic oil circuit. The oil return port is used to connect to the hydraulic oil source of the crane, and the oil outlets are used to connect to the hydraulic equipment of the crane. This invention connects the drive unit and the diversion unit. The drive unit in the drive unit can be driven by an external power source. After connecting the emergency device to the hydraulic system of the crane, the emergency device can draw hydraulic oil from the current hydraulic system and drive the corresponding working parts in the current hydraulic system to move, thus restoring the crane to a stopped state without using external hydraulic oil.

Description

Technical Field

[0001] This invention relates to the field of crane technology, specifically to emergency devices and cranes. Background Technology

[0002] When the crane's engine malfunctions and cannot be resolved in the short term, the crane needs to be restored from working to stopped and moved to an open area to await repair. The main tasks for restoring the crane from working to stopped include: lowering the load to the ground and rotating the crane's angle back to zero.

[0003] Since the current crane's engine cannot effectively drive the hydraulic system, an external drive device is needed to connect to the hydraulic system in order to restore the crane to a stopped state.

[0004] Currently, when existing cranes malfunction, they are generally powered by an external hydraulic pump station connected to the hydraulic system. The hydraulic pump station will supply its own hydraulic oil into the crane's hydraulic system. Since the type and cleanliness of the hydraulic oil in the hydraulic pump station are usually different from those in the crane's hydraulic system, the cleanliness of the crane's own hydraulic system will be significantly affected after the crane returns to a stopped state in this way, which will reduce the stability and reliability of the hydraulic system in subsequent operations. Summary of the Invention

[0005] In view of this, the present invention provides an emergency device and a crane to solve the problem that the existing emergency power supply methods of cranes affect the stability of the crane's own hydraulic system.

[0006] In a first aspect, the present invention provides an emergency device for driving a hydraulic system of a crane, comprising: The drive unit has a drive unit driven by an external power source, and the oil inlet end of the drive unit is used to communicate with the hydraulic oil source of the crane. The flow divider has an oil inlet, an oil return port, and multiple oil outlets. The oil inlet is connected to the oil outlet of the drive unit. The oil inlet is connected to the oil return port and the oil outlets respectively through the hydraulic oil circuit. The oil return port is used to connect to the hydraulic oil source of the crane, and the oil outlets are used to connect to the hydraulic equipment of the crane.

[0007] Beneficial effects: By connecting the drive unit and the distribution unit, the drive unit in the drive unit can be driven by an external power source. After connecting the emergency device to the crane's hydraulic system, the emergency device can draw hydraulic oil from the current hydraulic system and drive the corresponding working parts in the current hydraulic system to move. The crane can be restored to a stopped state without the use of external hydraulic oil, which effectively solves the problem that the existing emergency power supply method of cranes affects the stability of the crane's own hydraulic system.

[0008] In one alternative implementation, the drive unit is an electric pump, and the external power source is a power supply.

[0009] Beneficial effects: This type of drive unit is relatively easy to power, as the hydraulic system of the crane can be driven by the power supply at the construction site.

[0010] In one alternative implementation, the drive unit is a hydraulic pump, and the external power source is an external hydraulic system.

[0011] Beneficial effects: This type of drive unit has high safety and reliability, and can effectively reduce the safety risks to operators during rescue operations.

[0012] In one alternative embodiment, the drive unit further includes a control valve, the oil outlet of the drive unit being connected to the hydraulic oil source of the crane via the control valve, the control valve having an open state and a closed state.

[0013] Beneficial effects: Operators can control whether the emergency device works through the control valve. After the emergency device is connected to the external power source and the hydraulic system of the crane, the control valve can be turned to the closed state to drive the working parts in the hydraulic system to move. After the emergency device has finished working, the hydraulic oil can be returned to the hydraulic oil source by turning the control valve to the open state.

[0014] In one alternative implementation, the crane's hydraulic system includes a rotary motor; The multiple oil outlets include a first oil outlet and a second oil outlet. One of the oil inlet and oil outlet of the rotary motor is connected to the first oil outlet, and the other is connected to the second oil outlet. The flow divider also includes a first directional valve, with the oil inlet connected to the first directional valve via a first hydraulic circuit, the first directional valve connected to the first oil outlet via a second hydraulic circuit, the first directional valve connected to the second oil outlet via a third hydraulic circuit, and the first directional valve connected to the return port via a fourth hydraulic circuit. The first directional valve has a first valve position and a second valve position. When it is in the first valve position, the first hydraulic oil circuit is connected to the second hydraulic oil circuit, and the third hydraulic oil circuit is connected to the fourth hydraulic oil circuit. When it is in the second valve position, the first hydraulic oil circuit is connected to the third hydraulic oil circuit, and the second hydraulic oil circuit is connected to the fourth hydraulic oil circuit.

[0015] Beneficial effects: The hydraulic circuit used by the emergency device to drive the slewing motor is simple and reliable. By switching the valve position of the first directional valve, the driving direction of the slewing motor can be changed, thereby enabling the upper part of the crane to slew left or right.

[0016] In one alternative implementation, the crane's hydraulic system further includes a slewing brake; The multiple oil outlets also include a third oil outlet, which is used to connect to the rotary brake; The flow divider also includes a shuttle valve, one of the inlet ends of which is connected to the second hydraulic circuit, and the other inlet end of which is connected to the third hydraulic circuit. The outlet end of the shuttle valve is connected to the third outlet through the fifth hydraulic circuit.

[0017] Beneficial effects: This type of emergency device can be connected to both the rotary motor and the rotary brake simultaneously, effectively reducing the number of emergency devices required. In addition, the fifth hydraulic circuit is connected to the second and third hydraulic circuits via shuttle valves. When either the second or third hydraulic circuit is supplying oil, the hydraulic oil can flow into the fifth hydraulic circuit through the shuttle valve, thereby opening the rotary brake. This allows the emergency device to simultaneously open the rotary brake while driving the rotary motor, effectively reducing the complexity of the internal hydraulic circuits of the emergency device.

[0018] In one alternative implementation, the crane's hydraulic system further includes a slewing locking cylinder; The multiple oil outlets also include a fourth oil outlet, which is used to connect with the rotary locking cylinder; The flow divider also includes a second directional valve. The oil inlet is connected to the second directional valve through the sixth hydraulic circuit. The second directional valve is connected to the fourth oil outlet through the seventh hydraulic circuit. The second directional valve is connected to the return oil port through the eighth hydraulic circuit. The second directional valve has a third valve position and a fourth valve position. When it is in the third valve position, the sixth hydraulic oil circuit is connected to the seventh hydraulic oil circuit and the eighth hydraulic oil circuit is cut off. When it is in the fourth valve position, the seventh hydraulic oil circuit is connected to the eighth hydraulic oil circuit and the sixth hydraulic oil circuit is cut off.

[0019] Beneficial effects: This type of emergency device can be connected to the slewing motor, slewing brake and slewing locking cylinder at the same time. Only a single emergency device is needed to complete the unlocking and driving functions of the crane's slewing action. When the emergency device drives the upper vehicle to slew, the second directional valve switches to the third valve position. At this time, hydraulic oil will flow into the slewing locking cylinder, so that the slewing locking cylinder is unlocked.

[0020] In one optional embodiment, the drive unit includes a first relief valve, and the oil outlet of the drive unit is connected to the hydraulic oil source of the crane through the first relief valve. And / or, the diversion section includes a second relief valve, and the seventh hydraulic circuit is connected to the eighth hydraulic circuit through the second relief valve.

[0021] Beneficial effects: The first relief valve effectively limits the pressure of the hydraulic oil entering the inlet, ensuring that the hydraulic oil enters the distributor at a preset pressure, thus improving the safety of the emergency device. Additionally, the second relief valve prevents the pressure in the rotary locking cylinder from exceeding the preset pressure value, avoiding damage to the rotary locking cylinder and effectively protecting it, thereby enhancing the safety of the emergency device.

[0022] In one optional embodiment, the diversion section includes a first pressure reducing valve, which is disposed in the sixth hydraulic circuit and connected to the return port. And / or, the first pressure reducing valve is located in the fifth hydraulic circuit and connected to the return port.

[0023] Beneficial effects: The first pressure reducing valve can effectively control the pressure of the hydraulic oil output from the sixth hydraulic circuit, and the second pressure reducing valve can effectively control the pressure of the hydraulic oil output from the fifth hydraulic circuit.

[0024] Secondly, the present invention also provides a crane, comprising: a body having a hydraulic system; the aforementioned emergency device being placed on the body; and an external power source being driven and connected to the hydraulic system via the emergency device. Attached Figure Description

[0025] To more clearly illustrate the specific embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the hydraulic circuit layout of an emergency device according to an embodiment of the present invention; Figure 2 for Figure 1 A three-dimensional schematic diagram of the emergency device shown.

[0027] Explanation of reference numerals in the attached figures: 1. Drive unit; 101. Drive unit; 102. Control valve; 103. First relief valve; 104. First drive oil circuit; 105. Second drive oil circuit; 106. Flow control valve; 107. Motor relief valve; 108. Check valve; 2. Flow divider; 201. Oil inlet; 202. Oil return port; 2031. First oil outlet; 2032. Second oil outlet; 2033. Third oil outlet; 2034. Fourth oil outlet; 204. First directional valve; 205. First hydraulic circuit; 206. Second hydraulic circuit; 207. Third hydraulic circuit; 208. Fourth hydraulic circuit; 209. Shuttle valve; 210. Fifth hydraulic circuit; 211. Second directional valve; 212. Sixth hydraulic circuit; 213. Seventh hydraulic circuit; 214. Eighth hydraulic circuit; 215. Second relief valve; 216. First pressure reducing valve; 217. Second pressure reducing valve; 3. Mounting bracket; 4. Quick connector. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] The following is combined Figure 1 and Figure 2 The following describes embodiments of the present invention.

[0030] According to an embodiment of the present invention, in one aspect, an emergency device is provided for a hydraulic system for driving a crane, comprising: a drive unit 1 and a diverter unit 2; The drive unit 1 has a drive unit 101 driven by an external power source, and the oil inlet end of the drive unit 101 is connected to the hydraulic oil source of the crane. The diversion section 2 has an oil inlet 201, an oil return port 202, and multiple oil outlets. The oil inlet 201 is connected to the oil outlet end of the drive unit 101. The oil inlet 201 is connected to the oil return port 202 and the oil outlets respectively through the hydraulic oil circuit. The oil return port 202 is used to connect to the hydraulic oil source of the crane, and the oil outlets are used to connect to the hydraulic equipment of the crane.

[0031] The emergency device of this embodiment connects the drive unit 1 and the diversion unit 2. The drive unit 101 in the drive unit 1 can be driven to work by an external power source. After the emergency device is connected to the hydraulic system of the crane, the emergency device can draw hydraulic oil from the current hydraulic system and drive the corresponding working parts in the current hydraulic system to move. The crane can be restored to the stop state without the use of external hydraulic oil, which effectively solves the problem that the emergency power supply method of the existing crane affects the stability of the crane's own hydraulic system.

[0032] Specifically, there is no limitation on the specific type of drive unit 101. It can be an electric pump or a hydraulic pump, as long as it is easy to connect to an external power source and can be connected to the hydraulic system of the crane.

[0033] In related technologies, after a crane malfunctions, in order to avoid creating safety hazards at the construction site, the crane needs to be restored to a stopped state as soon as possible. When using a hydraulic pump station connected to the crane, the external hydraulic oil entering the crane's hydraulic system not only reduces its cleanliness, but also poses a risk of chemical reaction when different types or brands of hydraulic oil are mixed. In addition, hydraulic pump stations are generally large in size and weight, making it time-consuming and laborious to transport them to the construction site. This results in the crane needing to remain in a malfunctioning state for a longer period of time, which not only slows down the overall construction time but also greatly increases the safety risks at the construction site.

[0034] The emergency device in this embodiment has an indirect drive function. After the power source of the nearby equipment is connected to the emergency device, the emergency device can drive the currently malfunctioning crane back to a stopped state. It has a compact structure and can be transported with a vehicle. It does not require the use of large rescue equipment such as hydraulic pump stations, and can effectively prevent external hydraulic oil from flowing into the crane's own hydraulic system.

[0035] In addition, since the crane itself has a hydraulic system and an electric system, the drive unit 101, whether it is an electric pump or a hydraulic pump, can be driven by another crane that is working normally. Therefore, when all the cranes on the construction site are equipped with the emergency device of this embodiment, the cranes can rescue each other.

[0036] Furthermore, the emergency device of this embodiment is not limited to cranes. Any construction machinery with a hydraulic system that requires emergency drive can be used with the emergency device of this embodiment. Therefore, when a crane equipped with the emergency device of this embodiment is working, it can also quickly rescue nearby construction machinery that has malfunctioned, or quickly achieve self-rescue through nearby construction machinery when it malfunctions, which can significantly improve the speed and convenience of rescue at the construction site.

[0037] Among them, such as Figure 1 As shown, port S is the oil inlet of drive unit 101.

[0038] In one possible implementation, the drive unit 101 is an electric pump, and the external power source is a power supply. This type of drive unit 101 is relatively easy to obtain a power source, and the hydraulic system of the crane can be driven by the power supply at the construction site.

[0039] In one possible implementation, the drive unit 101 is a hydraulic pump and the external power source is an external hydraulic system. This type of drive unit 101 has high safety and reliability, and can effectively reduce the safety risks to operators during rescue operations.

[0040] It should be noted that, Figure 1 The hydraulic pump shown is a gear pump driven by a hydraulic motor. The drive unit 101 refers to the hydraulic motor of the hydraulic pump. It can be understood that, as an alternative implementation, the hydraulic pump can also be a piston pump.

[0041] Specifically, such as Figure 1 As shown, the drive unit 1 also includes an external hydraulic oil inlet, an external hydraulic oil outlet, a flow control valve 106, a motor relief valve 107, and a check valve 108. Port P is the external hydraulic oil inlet, and port T is the external hydraulic oil outlet. Port P is connected to the drive unit 101 via the first drive oil circuit 104, and the drive unit 101 is connected to port T via the second drive oil circuit 105. The flow control valve 106, the check valve 107, and the check valve 108 are both installed in the first drive oil circuit 104 and the second drive oil circuit 105. Between 05, the flow control valve 106 is installed near the T port and P port. The flow control valve 106 can stably input the externally input hydraulic oil into the drive unit 101 according to the preset flow rate. The check valve 108 opens unidirectionally from the second drive oil circuit 105 to the first drive oil circuit 104 under the preset opening pressure, which plays a role in preventing the drive unit 101 from reversing. The motor relief valve 107 plays a role in controlling the hydraulic oil pressure input to the drive unit 101, so as to prevent the external hydraulic oil pressure input to the drive unit 101 from exceeding the preset value.

[0042] The preset flow rate range of the flow control valve 106 is 30L / min to 80L / min, the preset opening pressure range of the check valve 108 is 1bar to 8bar, and the opening pressure range of the motor relief valve 107 is 150bar to 350bar.

[0043] Optionally, the preset flow rate of the flow control valve 106 is 55 L / min, the preset opening pressure of the check valve 108 is 3.5 bar, and the opening pressure of the motor relief valve 107 is 250 bar.

[0044] In one possible implementation, the drive unit 1 further includes a control valve 102. The oil outlet of the drive unit 101 is connected to the hydraulic oil source of the crane through the control valve 102. The control valve 102 has an open state and a closed state. The operator can control whether the emergency device works through the control valve 102. After the emergency device is connected to the external power source and the hydraulic system of the crane, the control valve 102 can be turned into the closed state to drive the working parts in the hydraulic system to move. After the emergency device has completed its work, the hydraulic oil can be returned to the hydraulic oil source by turning the control valve 102 into the open state.

[0045] The specific type of control valve 102 is not limited; it can be a manual control valve or a solenoid valve.

[0046] Optionally, since the emergency device is mainly used for emergency operations at the construction site, the control valve 102 is a manual control valve that can be opened or closed without an external power supply.

[0047] In one possible implementation, the crane's hydraulic system includes a rotary motor; The multiple oil outlets include a first oil outlet 2031 and a second oil outlet 2032. One of the oil inlet 201 and the oil outlet of the rotary motor is connected to the first oil outlet 2031, and the other is connected to the second oil outlet 2032. The diversion section 2 also includes a first directional valve 204. The oil inlet 201 is connected to the first directional valve 204 through the first hydraulic oil circuit 205. The first directional valve 204 is connected to the first oil outlet through the second hydraulic oil circuit 206. The first directional valve 204 is connected to the second oil outlet through the third hydraulic oil circuit 207. The first directional valve 204 is connected to the return oil port 202 through the fourth hydraulic oil circuit 208. The first directional valve 204 has a first valve position and a second valve position. When in the first valve position, the first hydraulic oil circuit 205 is connected to the second hydraulic oil circuit 206, and the third hydraulic oil circuit 207 is connected to the fourth hydraulic oil circuit 208. When in the second valve position, the first hydraulic oil circuit 205 is connected to the third hydraulic oil circuit 207, and the second hydraulic oil circuit 206 is connected to the fourth hydraulic oil circuit 208. The hydraulic circuit used by the emergency device to drive the slewing motor is simple and reliable. By switching the valve position of the first directional valve 204, the driving direction of the slewing motor can be changed, thereby enabling the upper part of the crane to slew left or right.

[0048] Among them, such as Figure 1 As shown, the first directional valve 204 also has a stop valve position. When the first directional valve 204 is in the stop valve position, the first hydraulic oil circuit 205 is cut off, and the second hydraulic oil circuit 206 and the third hydraulic oil circuit 207 are simultaneously connected to the fourth hydraulic oil circuit 208. At this time, the hydraulic oil in the rotary motor can flow back to the hydraulic oil source of the crane.

[0049] It should be noted that before the slewing motor drives the upper part of the crane to slew, the slewing locking cylinder and slewing brake need to be unlocked first. Therefore, another emergency device can be used to unlock the slewing locking cylinder and slewing brake separately.

[0050] Specifically, such as Figure 1 As shown, when the first reversing valve 204 is in the first valve position, the upper carriage of the crane performs one of the actions of left slewing or right slewing. When the first reversing valve 204 is in the second valve position, the upper carriage of the crane performs the other of the actions of left slewing or right slewing. The specific slewing direction is determined by the specific connection method between the first oil outlet 2031 and the second oil outlet 2032 and the slewing motor.

[0051] In one possible implementation, the crane's hydraulic system also includes a slewing brake; The multiple oil outlets also include a third oil outlet 2033, which is used to connect with the rotary brake; The diversion section 2 also includes a shuttle valve 209. One of the oil inlets of the shuttle valve 209 is connected to the second hydraulic circuit 206, and the other oil inlet is connected to the third hydraulic circuit 207. The oil outlet of the shuttle valve 209 is connected to the third oil outlet 2033 through the fifth hydraulic circuit 210.

[0052] This type of emergency device can be connected to both the rotary motor and the rotary brake simultaneously, effectively reducing the number of emergency devices required. In addition, the fifth hydraulic circuit 210 is connected to the second hydraulic circuit 206 and the third hydraulic circuit 207 via the shuttle valve 209. When either the second hydraulic circuit 206 or the third hydraulic circuit 207 is supplied with oil, the hydraulic oil can flow into the fifth hydraulic circuit 210 through the shuttle valve 209, thereby opening the rotary brake. This allows the emergency device to simultaneously open the rotary brake while driving the rotary motor, effectively reducing the complexity of the internal hydraulic circuits of the emergency device.

[0053] Among them, such as Figure 1 As shown, the fifth hydraulic oil circuit 210 is connected to multiple third oil outlets 2033. If there are multiple rotary brakes, they can be connected one by one through multiple third oil outlets 2033, so that multiple rotary brakes can be opened. If the opening pressure of the rotary brake is small, the third oil outlet 2033 with a smaller output pressure can be used.

[0054] To reduce the pressure of the hydraulic oil output from the third oil outlet 2033, the fifth hydraulic circuit 210 is equipped with a throttling orifice near the third oil outlet 2033. Figure 1One of the third oil outlets, at point 2033, is equipped with a throttling orifice. The specific parameters of the throttling orifice can be flexibly selected according to actual usage requirements. Figure 1 The parameters shown are merely an illustration of one embodiment.

[0055] In addition, this type of emergency device can also be used for hoisting rescue, such as... Figure 1 As shown, one of the first oil outlet 2031 or the second oil outlet 2032 is connected to the oil inlet of the open winch system, and the third oil outlet 2033 is connected to the brake port of the winch reducer. At this time, the first reversing valve 204 is set to the valve position for supplying oil to the oil inlet of the open winch system. At this time, controlling the reversing valve in the winch system can realize the raising and lowering of the winch, so that the emergency device can simultaneously drive the upper crane to rotate and drive the winch to lift.

[0056] In one possible implementation, the crane's hydraulic system also includes a slewing locking cylinder; The multiple oil outlets also include a fourth oil outlet 2034, which is used to communicate with the rotary locking cylinder. The diversion section 2 also includes a second directional valve 211. The oil inlet 201 is connected to the second directional valve 211 through the sixth hydraulic oil circuit 212. The second directional valve 211 is connected to the fourth oil outlet 2034 through the seventh hydraulic oil circuit 213. The second directional valve 211 is connected to the return oil port 202 through the eighth hydraulic oil circuit 214. The second directional valve 211 has a third valve position and a fourth valve position. When it is in the third valve position, the sixth hydraulic oil circuit 212 is connected to the seventh hydraulic oil circuit and the eighth hydraulic oil circuit 214 is closed. When it is in the fourth valve position, the seventh hydraulic oil circuit 213 is connected to the eighth hydraulic oil circuit 214 and the sixth hydraulic oil circuit 212 is closed.

[0057] This type of emergency device can be connected to the slewing motor, slewing brake, and slewing locking cylinder simultaneously. Only a single emergency device is needed to complete the unlocking and driving functions of the crane's slewing action. When the emergency device drives the upper vehicle to slew, the second directional valve 211 switches to the third valve position. At this time, hydraulic oil will flow into the slewing locking cylinder, causing the slewing locking cylinder to unlock.

[0058] In one possible implementation, the drive unit 1 includes a first relief valve 103, and the oil outlet of the drive unit 101 is connected to the hydraulic oil source of the crane through the first relief valve 103. The first relief valve 103 can effectively limit the pressure of the hydraulic oil entering the oil inlet 201, so that the hydraulic oil can enter the diversion part 2 according to the preset pressure, thereby improving the safety of the emergency device.

[0059] Specifically, the opening pressure range of the first relief valve 103 is 150 bar to 350 bar.

[0060] Optionally, the opening pressure of the first relief valve 103 is 250 bar.

[0061] In one possible implementation, the diversion section 2 includes a second relief valve 215. The seventh hydraulic oil circuit 213 is connected to the eighth hydraulic oil circuit 214 through the second relief valve 215. The second relief valve 215 can prevent the pressure in the rotary locking cylinder from exceeding the preset pressure value, avoid damage to the rotary locking cylinder, effectively protect the rotary locking cylinder, and improve the safety of the emergency device.

[0062] It should be noted that the opening pressure of the second relief valve 215 is less than the opening pressure of the first relief valve 103.

[0063] Specifically, the opening pressure range of the second relief valve 215 is 40 bar to 140 bar.

[0064] Optionally, the opening pressure of the second relief valve 215 is 90 bar.

[0065] In one possible implementation, the diversion section 2 includes a first pressure reducing valve 216, which is disposed in the sixth hydraulic oil circuit 212 and connected to the return port 202. The first pressure reducing valve 216 can effectively control the pressure of the hydraulic oil output from the sixth hydraulic oil circuit 212.

[0066] Specifically, the preset pressure value range of the first pressure reducing valve 216 is 10 bar to 60 bar.

[0067] Optionally, the preset pressure value of the first pressure reducing valve 216 is 35 bar.

[0068] In one possible implementation, the second pressure reducing valve 217 is disposed in the fifth hydraulic oil circuit 210 and connected to the return port 202. The second pressure reducing valve 217 can effectively control the pressure of the hydraulic oil output from the fifth hydraulic oil circuit 210.

[0069] Specifically, the preset pressure value of the second pressure reducing valve 217 is less than the opening pressure value of the second relief valve 215, and the preset pressure value range of the second pressure reducing valve 217 is 30 bar to 130 bar.

[0070] Optionally, the preset pressure value of the second pressure reducing valve 217 is 80 bar.

[0071] In one possible implementation, such as Figure 2 As shown, the emergency device also includes a mounting bracket 3 and a quick connector 4. The drive unit 1 and the diverter unit 2 are both mounted on the mounting bracket 3. The mounting bracket 3 can be connected to the crane body. The emergency device is connected to the crane's hydraulic system through the quick connector 4. The drive unit 101 is connected to an external power source through the quick connector 4.

[0072] According to an embodiment of the present invention, in another aspect, a crane is provided, comprising: a body and the aforementioned emergency device.

[0073] The fuselage has a hydraulic system; an emergency device is located in the fuselage; an external power source is connected to the hydraulic system via the emergency device.

[0074] Although embodiments of the 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 invention, and all such modifications and variations fall within the scope defined by the appended claims.

Claims

1. An emergency device for driving a hydraulic system of a crane, characterized in that, include: The drive unit (1) has a drive unit (101) driven by an external power source, and the oil inlet end of the drive unit (101) is used to communicate with the hydraulic oil source of the crane. The diversion section (2) has an oil inlet (201), an oil return port (202), and multiple oil outlets. The oil inlet (201) is connected to the oil outlet end of the drive unit (101). The oil inlet (201) is connected to the oil return port (202) and the oil outlets respectively through a hydraulic oil circuit. The oil return port (202) is used to connect to the hydraulic oil source of the crane, and the oil outlets are used to connect to the hydraulic equipment of the crane.

2. The emergency device according to claim 1, characterized in that, The drive unit (101) is an electric pump, and the external power source is a power supply.

3. The emergency device according to claim 1, characterized in that, The drive unit (101) is a hydraulic pump, and the external power source is an external hydraulic system.

4. The emergency device according to any one of claims 1 to 3, characterized in that, The drive unit (1) also includes a control valve (102). The oil outlet of the drive unit (101) is connected to the hydraulic oil source of the crane through the control valve (102). The control valve (102) has an open state and a closed state.

5. The emergency device according to any one of claims 1 to 3, characterized in that, The hydraulic system of the crane includes a rotary motor; The plurality of oil outlets include a first oil outlet (2031) and a second oil outlet (2032). One of the oil inlet (201) and oil outlet of the rotary motor is connected to the first oil outlet (2031), and the other is connected to the second oil outlet (2032). The diversion section (2) further includes a first directional valve (204). The oil inlet (201) is connected to the first directional valve (204) through a first hydraulic oil circuit (205). The first directional valve (204) is connected to the first oil outlet through a second hydraulic oil circuit (206). The first directional valve (204) is connected to the second oil outlet through a third hydraulic oil circuit (207). The first directional valve (204) is connected to the oil return port (202) through a fourth hydraulic oil circuit (208). The first directional valve (204) has a first valve position and a second valve position. When it is in the first valve position, the first hydraulic oil circuit (205) is connected to the second hydraulic oil circuit (206), and the third hydraulic oil circuit (207) is connected to the fourth hydraulic oil circuit (208). When it is in the second valve position, the first hydraulic oil circuit (205) is connected to the third hydraulic oil circuit (207), and the second hydraulic oil circuit (206) is connected to the fourth hydraulic oil circuit (208).

6. The emergency device according to claim 5, characterized in that, The hydraulic system of the crane also includes a slewing brake; The plurality of oil outlets also includes a third oil outlet (2033), which is used to communicate with the rotary brake; The diversion section (2) also includes a shuttle valve (209), one of the oil inlet ends of the shuttle valve (209) is connected to the second hydraulic oil circuit (206), and the other oil inlet end is connected to the third hydraulic oil circuit (207). The oil outlet end of the shuttle valve (209) is connected to the third oil outlet (2033) through the fifth hydraulic oil circuit (210).

7. The emergency device according to claim 6, characterized in that, The hydraulic system of the crane also includes a slewing locking cylinder; The plurality of oil outlets also includes a fourth oil outlet (2034), which is used to communicate with the rotary locking cylinder; The diversion section (2) further includes a second directional valve (211). The oil inlet (201) is connected to the second directional valve (211) through a sixth hydraulic oil circuit (212). The second directional valve (211) is connected to the fourth oil outlet through a seventh hydraulic oil circuit (213). The second directional valve (211) is connected to the return oil port (202) through an eighth hydraulic oil circuit (214). The second directional valve (211) has a third valve position and a fourth valve position. When it is in the third valve position, the sixth hydraulic oil circuit (212) is connected to the seventh hydraulic oil circuit and the eighth hydraulic oil circuit (214) is cut off. When it is in the fourth valve position, the seventh hydraulic oil circuit (213) is connected to the eighth hydraulic oil circuit (214) and the sixth hydraulic oil circuit (212) is cut off.

8. The emergency device according to claim 7, characterized in that, The drive unit (1) includes a first overflow valve (103), and the oil outlet of the drive unit (101) is connected to the hydraulic oil source of the crane through the first overflow valve (103). And / or, the diversion section (2) includes a second relief valve (215), and the seventh hydraulic circuit (213) is connected to the eighth hydraulic circuit (214) through the second relief valve (215).

9. The emergency device according to claim 7, characterized in that, The diversion section (2) includes a first pressure reducing valve (216), which is disposed in the sixth hydraulic oil circuit (212) and connected to the return port (202); And / or, the first pressure reducing valve (216) is disposed in the fifth hydraulic circuit (210) and connected to the return port (202).

10. A crane, characterized in that, include: The fuselage has a hydraulic system; The emergency device according to any one of claims 1 to 9 is placed in the fuselage; An external power source is connected to the hydraulic system via the emergency device.

Images