Dual-system hydraulic drive heavy screening machine

Abstract

The invention discloses a dual-system hydraulic drive heavy screening machine. The dual-system hydraulic drive heavy screening machine comprises a rack, a screening device, a fuel power box assembly and an external electric assembly. The screening device is arranged on the surface, away from the ground, of the rack. The fuel power box assembly is used for conveying hydraulic oil to the screening device. The external electric assembly is connected with an external power source and conveys hydraulic oil to the screening device. The electrical structure is in communication connection with the fuel power box assembly and the external electric assembly and is used for controlling the fuel power box assembly and the external electric assembly to operate; the triple electromagnetic valve set is arranged on one side of the fuel power box assembly and electrically connected with the external electric assembly, and the external electric assembly controls the triple electromagnetic valve set to switch the hydraulic driving mode from the fuel power box assembly driving mode to the external electric assembly driving mode. The heavy screening machine has two hydraulic oil transportation driving modes of electric driving and fuel driving, and switching is carried out through the triple electromagnetic valve group, so that the two driving modes are relatively independently used, energy is fully utilized, and resources are saved.

Description

Technical Field

[0001] The invention relates to the technical field of heavy-duty screening machines, and in particular to a dual-system hydraulically driven heavy-duty screening machine. Background Art

[0002] Head material refers to the stone that has just been mined from the mountain in the quarry. During the stone processing process, the head material needs to be screened first, and then subsequent crushing and further screening work can be carried out.

[0003] The screening work is done by heavy-duty screening machines. Existing heavy-duty screening machines use diesel engines as power sources. The diesel engines are directly connected to hydraulic pumps to drive the hydraulic motors to achieve the movement of the whole machine, the vibration of the vibrating screen, the rotation of the conveyor drive roller, etc. In large-scale operations, the fuel consumption of diesel engines is large, which leads to an increase in operating costs. In addition, in some occasions with strict environmental protection and energy-saving requirements, the existing heavy-duty screening machines are not equipped with electric drive systems and cannot meet the growing demand for energy conservation and emission reduction. Summary of the invention

[0004] The main purpose of the present invention is to provide a dual-system hydraulically driven heavy-duty screening machine, which aims to solve the problems of existing diesel engine driven heavy-duty screening machines with high fuel consumption, high operating costs, and failure to meet environmental protection and energy saving requirements.

[0005] To achieve the above object, the present invention proposes a dual-system hydraulically driven heavy-duty screening machine, comprising:

[0006] The frame has walking structures on both sides for frame movement;

[0007] A screening device, which is arranged on the surface of the frame away from the ground, has a feeding end and a screening end, and is used for multi-stage screening, and an installation space is formed between the feeding end and part of the screening end and the frame;

[0008] A fuel power box assembly is arranged in the installation space and below the feeding end, and the fuel power box assembly is used to deliver hydraulic oil to the screening device;

[0009] An external electric assembly is arranged in the installation space and is located on a side of the fuel power box assembly close to the screening end, the external electric assembly is connected to an external power source and delivers hydraulic oil to the screening device;

[0010] an electrical structure, which is in communication with the fuel power tank assembly and the external power assembly and is used to control the operation of the fuel power tank assembly and the external power assembly; and

[0011] The triple solenoid valve group is arranged on one side of the fuel power tank assembly and is electrically connected to the external power supply assembly. The external power supply assembly controls the triple solenoid valve group to switch the hydraulic drive mode from being driven by the fuel power tank assembly to being driven by the external power supply assembly; when the external power supply assembly disconnects the external power supply, the triple solenoid valve group resets and switches the hydraulic drive mode from being driven by the external power supply assembly to being driven by the fuel power tank assembly.

[0012] Preferably, the external power supply assembly includes a heavy-duty connector, a three-phase motor, a second triple gear pump group, and a control cabinet. The heavy-duty connector is connected to the external power supply and is used to supply power to the three-phase motor and the control cabinet. The control cabinet is communicatively connected to the electrical structure and controls the operation of the three-phase motor. The three-phase motor drives the second triple gear pump group to operate, and the second triple gear pump group is used to convey hydraulic oil to the screening device; the control cabinet is electrically connected to the triple solenoid valve group and is used to control the triple solenoid valve group to switch the hydraulic drive mode.

[0013] Preferably, the external power supply assembly further includes a soft starter cabinet. The soft starter cabinet and the control cabinet are oppositely arranged on the frame and are respectively electrically connected to the control cabinet and the three-phase motor. The three-phase motor is installed between them. The soft starter cabinet is used to start the three-phase motor and limit the starting current.

[0014] Preferably, the external power supply assembly further includes a protective cover. The protective cover is arranged on the side of the three-phase motor facing the screening end and is located between the control cabinet and the soft starter cabinet.

[0015] Preferably, it further includes a hydraulic oil radiator, which is arranged on one side of the three-phase motor.

[0016] Preferably, the fuel power tank assembly includes a fuel power structure and a first triple gear pump group. The fuel power structure is drivingly connected to the first triple gear pump group, and the first triple gear pump group conveys hydraulic oil to the screening device.

[0017] Preferably, the fuel power structure includes a fuel engine, a fuel storage tank, and an engine radiator. The fuel engine is arranged on the frame, and one end of it is drivingly connected to the first triple gear pump group. The engine radiator is arranged at the opposite end of the fuel engine connected to the first triple gear pump group. The fuel storage tank transports fuel to the fuel engine through a pipeline.

[0018] Preferably, a hydraulic oil tank is arranged between the fuel power tank assembly and the external power supply assembly. The hydraulic oil tank transports hydraulic oil to the screening device through a pipeline.

[0019] Preferably, the screening device includes a feeder, a vibrating screen, and a material receiving component. The feeder is arranged above the fuel power tank assembly and is used to convey materials to the vibrating screen. The vibrating screen has multiple layers of screen meshes, and the diameter of the mesh holes of the screen meshes decreases from top to bottom. The vibrating screen is provided with an outlet corresponding to each screen mesh, and the material receiving component is arranged at the outlet.

[0020] Preferably, it further includes a lighting device, and the electrical structure or the external power supply assembly is electrically connected to the lighting device.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] 1. This heavy-duty screening machine is configured with a fuel power tank assembly and an external power supply assembly as the power sources for transporting hydraulic oil. The hydraulic oil tank is connected to both of them through pipelines, and a three-way solenoid valve group is used to switch the power transmission mode of the hydraulic oil.

[0023] 2. When the equipment works in an environment without external power supply or without the condition of pulling electricity, the fuel power tank assembly is used as the driving source for transporting hydraulic oil, enabling the equipment to operate normally without being restricted by the environment and allowing it to travel long distances at the same time; when the equipment is in a place with external power supply, the external power supply assembly is used to connect to the external power supply to work and drive the transportation and operation of the hydraulic oil, and it can also travel short distances at the same time, saving costs, achieving energy complementarity, and making full use of resources.

[0024] 3. The fuel power tank assembly and the external power supply assembly are independent power sources and are used independently without affecting each other, ensuring the benefits of users. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0026] Figure 1 It is a schematic structural diagram of the dual-system hydraulic-driven heavy-duty screening machine of the present invention;

[0027] Figure 2 It is a schematic structural diagram of the dual-system hydraulic-driven heavy-duty screening machine from another angle;

[0028] Figure 3 It is a schematic structural diagram of the hydraulic oil transportation and driving part in the dual-system hydraulic-driven heavy-duty screening machine of the present invention;

[0029] Figure 4It is a schematic structural diagram of another angle of the hydraulic oil transportation and drive part in the dual-system hydraulic drive heavy-duty screening machine of the present invention;

[0030] Figure 5 It is a schematic structural diagram of the external power supply assembly in the dual-system hydraulic drive heavy-duty screening machine of the present invention;

[0031] Figure 6 It is a schematic structural diagram of another angle of the external power supply assembly in the dual-system hydraulic drive heavy-duty screening machine of the present invention;

[0032] Figure 7 It is a schematic structural diagram of the fuel power box assembly in the dual-system hydraulic drive heavy-duty screening machine of the present invention;

[0033] Figure 8 It is a top view of the fuel power box assembly in the dual-system hydraulic drive heavy-duty screening machine of the present invention;

[0034] Figure 9 It is a schematic structural diagram of another angle of the fuel power box assembly in the dual-system hydraulic drive heavy-duty screening machine of the present invention.

[0035] In the drawings, 1 - frame, 2 - screening device, 21 - feeding end, 22 - screening end, 23 - feeder, 24 - vibrating screen, 25 - material receiving assembly, 251 - fine material receiving assembly, 252 - medium material receiving assembly, 253 - coarse material receiving assembly, 3 - fuel power box assembly, 31 - fuel power structure, 311 - fuel engine, 312 - fuel storage tank, 313 - engine radiator, 32 - first triple gear pump set, 4 - external power supply assembly, 41 - heavy-duty connector, 42 - three-phase motor, 421 - bell housing, 43 - second triple gear pump set, 44 - control cabinet, 45 - soft start cabinet, 46 - protective cover, 5 - traveling structure, 6 - triple solenoid valve group, 7 - hydraulic oil radiator, 71 - bracket, 8 - hydraulic oil tank, 9 - lighting device, 10 - electrical structure, 101 - traveling solenoid valve, 102 - single manual valve, 103 - five-way manual valve with central oil return. Detailed implementation manners

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0037] It should be understood that when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, wholes, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their combinations.

[0038] It should also be understood that the terminology used in the specification of the present invention is for the purpose of describing particular embodiments only and is not intended to limit the present invention. As used in the specification of the present invention and the appended claims, unless the context clearly dictates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms.

[0039] It should be further understood that the term "and / or" used in the specification of the present invention and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0040] Existing heavy-duty screening machines generally adopt hydraulic drive, where the engine is directly connected to a hydraulic pump to drive each hydraulic motor to achieve functions such as the movement of the whole machine, the vibration of the vibrating screen, and the rotation of the driving roller of the conveyor. However, there are problems such as high fuel consumption of the engine and high costs.

[0041] To solve the above problems, please refer to Figures 1 to 9As shown in the figure, the present invention provides a dual-system hydraulic-driven heavy-duty screening machine, which includes a frame 1, a screening device 2, a fuel power box assembly 3, an external power supply assembly 4, an electrical structure 10, and a triple solenoid valve group 6. Walking structures 5 are arranged on both sides of the frame 1 for the movement of the frame 1; the screening device 2 is arranged on the surface of the frame 1 facing away from the ground and has a feeding end 21 and a screening end 22 for multi-stage screening. An installation space is formed between the feeding end 21 and part of the screening end 22 and the frame 1; the fuel power box assembly 3 is arranged in the installation space and below the feeding end 21, and the fuel power box assembly 3 is used to supply hydraulic oil to the screening device 2; the external power supply assembly 4 is arranged in the installation space and on the side of the fuel power box assembly 3 close to the screening end 22. The external power supply assembly 4 is connected to an external power supply and supplies hydraulic oil to the screening device 2; the electrical structure 10 is communicatively connected to the fuel power box assembly 3 and the external power supply assembly 4 for controlling the operation of the fuel power box assembly 3 and the external power supply assembly 4; the triple solenoid valve group 6 is arranged on one side of the fuel power box assembly 3 and electrically connected to the external power supply assembly 4. The external power supply assembly 4 controls the triple solenoid valve group 6 to switch the hydraulic drive mode from being driven by the fuel power box assembly 3 to being driven by the external power supply assembly 4; when the external power supply assembly 4 disconnects the external power supply, the triple solenoid valve group 6 resets and the hydraulic drive mode is switched from being driven by the external power supply assembly 4 to being driven by the fuel power box assembly 3.

[0042] As Figure 1 and Figure 2As shown, the screening device 2 includes a feeder 23, a vibrating screen 24 and a material receiving assembly 25. The feeder 23 is arranged above the fuel power tank assembly 3 and is used to convey materials to the vibrating screen 24. The feeder 23 has a feeding port and a discharging port, and the discharging port is docked with the inlet of the vibrating screen 24. The vibrating screen 24 has multiple layers of screen meshes, and the diameter of the mesh holes of the screen meshes decreases from top to bottom. The vibrating screen 24 is provided with an outlet corresponding to each screen mesh, and the material receiving assembly 25 is arranged at the outlet. In this embodiment, the material receiving assembly 25 includes a material receiving frame, a conveyor belt and rollers. The material receiving frame is connected to the frame 1, and one end of it is located below the outlet. There are three groups of the material receiving assembly 25, which are divided into a fine material receiving assembly 251, a medium material receiving assembly 252 and a coarse material receiving assembly 253 according to the fineness of the materials. The three are arranged from bottom to top, and one end of them is docked with the corresponding screen mesh. The fine material receiving assembly 251, the medium material receiving assembly 252 and the coarse material receiving assembly 253 are arranged in a staggered manner. Further, the lifting of the feeder 23, the rotation or telescoping of the material receiving assembly 25, and the vibration of the vibrating screen 24 are all realized by hydraulic motors. The driving hydraulic oil provides power for the corresponding first triple gear pump group 32 and second triple gear pump group 43 through the fuel power tank assembly 3 or the external power supply assembly 4, and enters each hydraulic motor through the corresponding pipeline. The traveling structure 5 is a crawler traveling mechanism, as Figure 8 shown, and its operation is controlled by a remote control and a traveling solenoid valve 101. The remote control controls the traveling solenoid valve 101 to make the traveling motor work to realize the traveling and steering of the whole equipment. In practical applications, when selecting the driving power source of the hydraulic oil transmission, the traveling distance and the cable length need to be considered. When the equipment needs to travel a long distance, the fuel power tank assembly 3 is used, and when traveling a short distance, the external power supply assembly 4 is used.

[0043] Process of the vibrating screen 24: After the material equipment feeds the material to the feeder 23, the material is sent from the feeder 23 to the vibrating screen 24. After being screened by the vibrating screen 24, the material is divided into three types. The oversize product on the upper layer screen falls into the coarse material receiving assembly 253, the oversize product on the lower layer screen falls into the medium material receiving assembly 252, and the undersize product on the lower layer screen falls into the fine material receiving assembly 251. The materials falling into the corresponding material receiving assembly 25 are respectively transported to the designated positions, realizing the screening work of the materials. Further, a single manual valve 102 is arranged on each pipeline leading to each hydraulic motor, and the on-off of the pipeline is controlled by the single manual valve 102 to realize the control of the operation of each hydraulic motor and the traveling motor.

[0044] In an alternative embodiment, as Figure 5 and Figure 6As shown in the figure, the external power supply assembly 4 includes a heavy-duty connector 41, a three-phase motor 42, a second triple gear pump set 43, and a control cabinet 44. The heavy-duty connector 41 is connected to the external power supply and is used to supply power to the three-phase motor 42 and the control cabinet 44. The control cabinet 44 is communicatively connected to the electrical structure 10 and controls the operation of the three-phase motor 42. The three-phase motor 42 drives the second triple gear pump set 43 to operate, and the second triple gear pump set 43 is used to transport the hydraulic oil in the hydraulic oil tank 8 to the screening device 2. The control cabinet 44 is electrically connected to the triple solenoid valve group 6 and is used to control the triple solenoid valve group 6 to switch the hydraulic oil transportation driving mode. The externally connected power supply is called the external power supply, including the commercial power and the power generated by the power generation box outside the equipment. Among them, the heavy-duty connector, also known as the HDC heavy-duty connector and aviation plug, is an electronic component used to transmit power, signals, or data. It establishes physical contact and connection between the socket and the plug through an electronic contactor to achieve data transmission and energy transfer between devices, and it can withstand large loads (such as motors, pumps, etc.). After the external power supply is connected to the heavy-duty connector 41, the control cabinet 44 is powered on and controls the operation through the electrical structure 10. After the three-phase motor 42 is normally started, it drives the second triple gear pump set 43 to work, and the control cabinet 44 controls the second triple gear pump set 43 to supply hydraulic oil to the hydraulic motors of the feeder 23, the vibrating screen 24, and the receiving component 25 and the crawler travel motor of the traveling structure 5 respectively.

[0045] Further, as Figure 5 shown, a bell-shaped cover 421 is arranged on the circumferential side of the driving end of the three-phase motor 42. The bell-shaped cover 421 is provided with a through hole for connecting the driving end of the three-phase motor 42 to the second triple gear pump set 43, and a part of the second triple gear pump set 43 is fixedly connected to the bell-shaped cover 421 to achieve the stable connection of the second triple gear pump set 43.

[0046] In an alternative embodiment, as Figure 5 shown, the external power supply assembly 4 further includes a soft starter cabinet 45. The soft starter cabinet 45 and the control cabinet 44 are oppositely arranged on the frame 1 and are respectively electrically connected to the control cabinet 44 and the three-phase motor 42. The three-phase motor 42 is installed between them. The soft starter cabinet 45 is used to start the three-phase motor 42 and limit the starting current. Since the starting current of the directly started large-power three-phase motor 42 will be very large at the moment of starting, in order to avoid causing circuit failures or preventing the three-phase motor 42 from starting, it is necessary to use the soft starter cabinet 45 to start in such a case. The soft starter cabinet 45 starts through the voltage ramp starting method, gradually increases the motor voltage, and limits the starting current to achieve the smooth starting of the three-phase motor 42. Further, a frequency converter can also be used instead of the soft starter cabinet 45.

[0047] In an alternative embodiment, as Figure 5As shown, the external power supply assembly 4 further includes a protective cover 46. The protective cover 46 is disposed on the side of the three-phase motor 42 facing the screening end 22 and is located between the control cabinet 44 and the soft starter cabinet 45. The protective cover 46 is connected to the frame 1 through a connecting member, and an included angle is formed between the protective cover 46 and the frame 1. A space is enclosed among the protective cover 46, the soft starter cabinet 45, the control cabinet 44, and the frame 1. The three-phase motor 42, the hydraulic oil radiator 7, and the fuel storage tank 312 are all installed in this space.

[0048] In an alternative embodiment, as Figure 5 shown, it further includes a hydraulic oil radiator 7, which is disposed on one side of the three-phase motor 42. The hydraulic oil radiator 7 is installed on the frame 1 through a bracket 71. The hydraulic oil in the hydraulic pipeline is cooled by the hydraulic oil radiator 7, and the hydraulic oil radiator 7 is powered by the external power supply assembly 4 to work. By setting the hydraulic oil radiator 7 in the external power supply assembly 4 to cool the high-temperature hydraulic oil, the normal operation of the hydraulic components can be effectively ensured and their service life can be extended.

[0049] In an alternative embodiment, as Figures 7 to 9 shown, the fuel power tank assembly 3 includes a fuel power structure 31 and a first triple gear pump set 32. The fuel power structure 31 is drivingly connected to the first triple gear pump set 32, and the first triple gear pump set 32 transports hydraulic oil to the screening device 2. The fuel power structure 31 includes a fuel engine 311, a fuel storage tank 312, and an engine radiator 313. The fuel engine 311 is disposed on the frame 1, and one end thereof is drivingly connected to the first triple gear pump set 32. The engine radiator 313 is disposed at the opposite end of the fuel engine 311 connected to the first triple gear pump set 32. The fuel storage tank 312 transports fuel to the fuel engine 311 through a pipeline. The fuel engine 311 is a diesel engine, and a sealing plate is provided on one end face thereof. The first triple gear pump set 32 is fixed behind the sealing plate and is connected to the power take-off port of the diesel engine through a coupling. The electrical structure 10 is communicatively connected to the fuel engine 311. After the fuel engine 311 is started, the fuel engine 311 drives the first triple gear pump set 32 to operate and transports hydraulic oil to each hydraulic motor. Further, when the heavy-duty screening machine uses the fuel power tank assembly 3 as a hydraulic power source, the engine radiator 313 is directly driven by the fuel engine 311. The engine radiator 313 integrates the water cooling, intercooling of the fuel engine 311, and the cooling of the hydraulic oil. The hydraulic oil in the hydraulic pipeline is cooled by the engine radiator 313 to ensure the normal operation of the fuel engine 311 and the hydraulic components and extend their service life.

[0050] In an alternative embodiment, as Figure 7As shown in the figure, a hydraulic oil tank 8 is provided between the fuel power tank assembly 3 and the external power supply assembly 4. The hydraulic oil tank 8 transports hydraulic oil to the screening device 2 through pipelines. The hydraulic oil tank 8 is arranged close to the hydraulic oil radiator 7 and is used to supply hydraulic oil to each operating component. The hydraulic oil tank 8 is respectively connected to the first triple gear pump set 32 and the second triple gear pump set 43 through pipelines. When the heavy-duty screening machine uses the fuel power tank assembly 3 as the hydraulic power source, the hydraulic oil pipeline between the hydraulic oil tank 8 and the first triple gear pump set 32 is communicated, and the hydraulic oil is transported to each hydraulic component through the first triple gear pump set 32 for driving the hydraulic components; when the heavy-duty screening machine uses the external power supply assembly 4 as the hydraulic power source, the staff controls the triple solenoid valve group 6 through the control cabinet 44 to cut off the passage between the hydraulic oil tank 8 and the first triple gear pump set 32, so that the hydraulic oil pipeline between the hydraulic oil tank 8 and the second triple gear pump set 43 is communicated, and the hydraulic oil is transported to each hydraulic component through the second triple gear pump set 43 for driving the hydraulic components. The hydraulic components include the above-mentioned hydraulic motors, the bending cylinders of the middle material receiving component 252, the bending cylinders of the fine material receiving component 251, and the crawler travel motors of the traveling structure 5. Further, a five-way manual valve 103 for middle position oil return is also arranged on one side of the soft start cabinet 45 and the control cabinet 44. By operating the single-way manual valve 102, the oil path goes to the five-way manual valve 103 for middle position oil return, and by operating the five-way manual valve 103 for middle position oil return, the corresponding cylinders for controlling the lifting of the coarse material receiving component 253, the bending of the middle material receiving component 252, and the bending of the fine material receiving component 251 work, so as to realize the state adjustment of the receiving component 25.

[0051] In an alternative embodiment, as Figure 1 shown, a lighting device 9 is further included, and the electrical structure 10 or the external power supply assembly 4 is electrically connected to the lighting device 9. When the heavy-duty screening machine uses the fuel power tank assembly 3 as the transportation power source of the hydraulic oil, the electrical structure 10 supplies power to the lighting device 9. When the external power supply assembly 4 is used as the transportation power source of the hydraulic oil, the lighting device 9 can be directly supplied with power, and the operation of the lighting device 9 can be controlled through the control cabinet 44. The use of the lighting device 9 is beneficial for the heavy-duty screening machine to work in the case of insufficient ambient light.

[0052] Driving principle of the fuel power tank assembly 3: The fuel engine 311 is started through the electrical structure 10, and the fuel engine 311 drives the first triple gear pump set 32 to work. At this time, the pipeline between the hydraulic oil tank 8 and the first triple gear pump set 32 is communicated, and the hydraulic oil is transported to each hydraulic component through the first triple gear pump set 32. Whether each device is running can be displayed on the display screen of the electrical structure 10, and the traveling of the device is remotely controlled through the remote control and the traveling solenoid valve 101.

[0053] Principle of the external power supply assembly 4: The external power supply is connected to the external power supply assembly 4 through the heavy-duty connector 41. The control cabinet 44 is powered on and starts through the electrical structure 10. The control cabinet 44 controls the three-way solenoid valve group 6 to cut off the passage between the hydraulic oil tank 8 and the first three-way gear pump group 32, and opens the passage between the hydraulic oil tank 8 and the second three-way gear pump group 43. The control cabinet 44 controls the soft starter cabinet 45 to operate. The three-phase motor 42 is powered on and starts normally through the soft starter cabinet 45. The three-phase motor 42 drives the second three-way gear pump group 43 to work. The hydraulic oil is transported to each hydraulic component through the second three-way gear pump group 43. Whether each device is running can be displayed on the display screen of the electrical structure 10. The movement of the device is remotely controlled through the remote control and the travel solenoid valve 101. When the external power supply assembly 4 is disconnected from the external power supply, the three-way solenoid valve group 6 resets, and the driving mode of the hydraulic oil transportation is switched from the external power supply assembly 4 to the fuel power box assembly 3.

[0054] In summary, this heavy-duty screening machine is equipped with the fuel power box assembly 3 and the external power supply assembly 4 as the power sources for transporting hydraulic oil. The hydraulic oil tank 8 is connected to both of them through pipelines, and the power transmission mode of the hydraulic oil is switched through the three-way solenoid valve group 6. When the device works in an environment without external power or without the condition of pulling electricity, the fuel power box assembly 3 is used as the driving source for transporting hydraulic oil, enabling the device to operate normally without being restricted by the environment and allowing for long-distance travel at the same time. When the device is in a place with external power, the external power supply assembly 4 is connected to the external power supply to work and drive the transportation and operation of the hydraulic oil, and short-distance travel can be carried out at the same time, saving costs, achieving energy complementarity, and making full use of resources. The fuel power box assembly 3 and the external power supply assembly 4 are independent power sources and are used independently without affecting each other, ensuring the benefits of users.

[0055] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A dual-system hydraulic-driven heavy-duty screening machine, characterized in that, Comprising: A frame, with traveling structures provided on both sides thereof for the movement of the frame; A screening device, which is provided on the surface of the frame facing away from the ground, having a feeding end and a screening end for performing multi-stage screening, and an installation space is formed between the feeding end and a part of the screening end and the frame; A fuel power tank assembly, which is arranged in the installation space and below the feeding end, and the fuel power tank assembly is used to convey hydraulic oil to the screening device; An external power supply assembly, which is arranged in the installation space and on the side of the fuel power tank assembly close to the screening end. The external power supply assembly is connected to an external power source and conveys hydraulic oil to the screening device; An electrical structure, which is communicatively connected to the fuel power tank assembly and the external power supply assembly for controlling the operation of the fuel power tank assembly and the external power supply assembly; and, A three-way solenoid valve group, which is arranged on one side of the fuel power tank assembly and electrically connected to the external power supply assembly. The external power supply assembly controls the three-way solenoid valve group to switch the hydraulic drive mode from being driven by the fuel power tank assembly to being driven by the external power supply assembly; when the external power supply assembly disconnects the external power source, the three-way solenoid valve group resets the hydraulic drive mode to switch from being driven by the external power supply assembly to being driven by the fuel power tank assembly.

2. The dual-system hydraulic-driven heavy-duty screening machine according to claim 1, characterized in that, The external power supply assembly includes a heavy-duty connector, a three-phase motor, a second three-way gear pump group and a control cabinet. The heavy-duty connector is connected to the external power source and is used to supply power to the three-phase motor and the control cabinet. The control cabinet is communicatively connected to the electrical structure and controls the operation of the three-phase motor. The three-phase motor drives the second three-way gear pump group to operate, and the second three-way gear pump group is used to convey hydraulic oil to the screening device; the control cabinet is electrically connected to the three-way solenoid valve group for controlling the three-way solenoid valve group to switch the hydraulic drive mode.

3. The double-system hydraulic-driven heavy-duty screening machine according to claim 2, wherein The external power supply assembly further includes a soft starter cabinet, which is arranged on the frame opposite to the control cabinet and is electrically connected to the control cabinet and the three-phase motor respectively. The three-phase motor is installed between them, and the soft starter cabinet is used to start the three-phase motor and limit the starting current.

4. The dual-system hydraulic drive heavy-duty screening machine according to claim 2 or 3, characterized in that, The external power supply assembly further includes a protective cover, which is arranged on the side of the three-phase motor facing the screening end and between the control cabinet and the soft starter cabinet.

5. The double-system hydraulic-driven heavy-duty screening machine according to claim 2, characterized in that, It further includes a hydraulic oil radiator, which is arranged on one side of the three-phase motor.

6. The dual-system hydraulic drive heavy-duty screening machine according to claim 1, wherein, The fuel power tank assembly includes a fuel power structure and a first three-way gear pump group. The fuel power structure is drivingly connected to the first three-way gear pump group, and the first three-way gear pump group conveys hydraulic oil to the screening device.

7. The dual-system hydraulic drive heavy-duty screening machine according to claim 6, characterized in that, The fuel power structure includes a fuel engine, a fuel storage tank and an engine radiator. The fuel engine is arranged on the frame, and one end thereof is drivingly connected to the first three-way gear pump group. The engine radiator is arranged at the opposite end of the fuel engine connected to the first three-way gear pump group. The fuel storage tank conveys fuel to the fuel engine through a pipeline.

8. The dual-system hydraulic-driven heavy-duty screening machine according to claim 1, wherein, A hydraulic oil tank is provided between the fuel power tank assembly and the external power supply assembly, and the hydraulic oil tank transports hydraulic oil to the screening device through pipelines.

9. The dual-system hydraulic-driven heavy-duty screening machine according to claim 1, characterized in that, The screening device includes a feeder, a vibrating screen, and a material receiving assembly. The feeder is arranged above the fuel power tank assembly and is used to convey materials to the vibrating screen. The vibrating screen has multiple layers of screen meshes, and the mesh diameter of the screen meshes decreases from top to bottom. The vibrating screen is provided with an outlet corresponding to each screen mesh, and the material receiving assembly is arranged at the outlet.

10. The double-system hydraulic drive heavy-duty screening machine according to claim 1, wherein, It further includes a lighting device, and the electrical structure or the external power supply assembly is electrically connected to the lighting device.

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