Mobile box forced discharge system

Abstract

The application discloses a kind of mobile box forced unloading system in the field of garbage compression equipment, including corresponding car compartment detachable garbage truck and movable box, movable box is respectively equipped with with top door hinge top door oil cylinder, with bucket support hinge bucket oil cylinder, with push head oil cylinder and control rear door opening and closing rear door oil cylinder transmission connection of push plate, movable box is provided with hydraulic power unit, the hydraulic power unit is integrated with hydraulic oil tank two, hydraulic control valve group, double power control valve group and L type three-way ball valve, the movable box is also respectively provided with quick plug connector male, quick plug connector female;The car compartment detachable garbage truck is installed with hydraulic oil tank one and power switch valve group, and the quick plug connector male of the car compartment detachable garbage truck corresponding movable box, quick plug connector female is respectively matched with quick plug connector female, quick plug connector male is equipped with.This application can clean up the garbage in movable box.

Description

Technical Field

[0001] This invention belongs to the field of waste compression equipment, and specifically relates to a forced unloading system for a small mobile compression device. Background Technology

[0002] Currently, for many urban streets and residential communities, especially in vast rural areas, the collection and storage of daily household waste is related to people's quality of life and environmental quality. These areas often have limited land area, making it unsuitable to build larger waste treatment transfer stations. Although small collection vehicles can be used, they still need to be sent to waste treatment stations for centralized processing after collection. Small collection vehicles have a small loading capacity, so they need to go to the waste station frequently to process the waste, which is not economical. This led to the development of a mobile, compressible trash can. This type of trash can is flexible in placement, occupies little space, and requires no special supporting facilities to operate. It can be flexibly placed wherever needed, requiring only a power source. It can accept trash directly from the top, or be equipped with a trash can lifting device to automatically unload trash from the bins into the can. It can also connect with small collection vehicles to store trash from those vehicles. Crucially, it has its own compression mechanism that compresses the trash inside, significantly increasing its storage capacity. Once full, the mobile can is transported to a landfill using a detachable transport vehicle. Due to its large loading capacity and long waste collection cycle, it is well-suited for use in residential communities and has become very popular in the market.

[0003] After the mobile compactor is full of garbage, it needs to be transported to a landfill by a detachable garbage truck. The detachable garbage truck uses its hook arm to hook the mobile container onto the truck and lock it in place. When dumping the garbage, the rear door of the mobile container needs to be opened using the hydraulic power of the hook-lift truck. Specifically, during unloading, connect the two hoses with quick-connect fittings on the hook-lift truck's outrigger cylinder lines to the quick-connect fittings pre-installed on the rear door of the mobile compactor. Then, switch the two three-way ball valves on the hook-lift truck's rear outrigger lines to connect the main outrigger control line to the hydraulic cylinder for opening the rear door of the mobile container. Operate the outrigger control valve of the detachable garbage truck; pressurized oil will then directly enter the rear door cylinder, controlling the cylinder to open the rear door. Afterwards, the detachable garbage truck can then use its hydraulic power to open the door. The dump truck is equipped with a power-lifting movable container. The garbage inside the container automatically dumps out under gravity. Under normal circumstances, the garbage can be completely emptied. However, because the container itself has a compression function, the garbage inside has a certain compaction density and high friction. When the garbage is highly sticky, gravity alone cannot completely unload it, especially in winter when the moisture in the garbage can freeze inside the container, making it even more difficult to empty. Manual cleaning in such conditions is too difficult and unsafe. To solve this problem, external force is needed to push the garbage out of the movable container. This system is designed to solve this problem. Summary of the Invention

[0004] The purpose of this invention is to provide a mobile container forced unloading system that can solve the problems in the background art, eliminating the need for external force to push the garbage out of the mobile container, and can automatically clean the garbage in the mobile container.

[0005] The objective of this invention is achieved as follows: A mobile container forced unloading system includes a detachable garbage truck and a mobile container, the mobile container having an openable top door on its upper part, a flip-up bucket-lifting bracket on its front side, a push plate inside the mobile container for pushing garbage, and an openable rear door on its rear side. The mobile container is equipped with a top door cylinder hinged to the top door, a bucket-lifting cylinder hinged to the bucket-lifting bracket, a push head cylinder connected to the push plate, and a rear door cylinder for controlling the opening and closing of the rear door. The mobile container is equipped with a hydraulic power unit, which integrates a second hydraulic oil tank, a hydraulic control valve group, a dual power control valve group, and an L-shaped three-way ball valve. The mobile container is also equipped with a quick-connect male connector and a quick-connect female connector. The detachable garbage truck is equipped with a first hydraulic oil tank and a power switching valve group. The quick-connect male and female connectors on the detachable garbage truck are respectively matched with quick-connect female and quick-connect male connectors on the mobile container.

[0006] The invention utilizes a top-door hydraulic cylinder to control the opening and closing of the top door. The garbage bin is placed on a lifting bracket, and the lifting cylinder controls the lifting bracket to flip upwards, allowing the garbage to be poured into the movable box. A pusher cylinder controls the movement of a pusher mechanism within the movable box, compressing and pushing the garbage. A dual-power control valve group controls a two-position three-way hydraulic valve at different positions via an internal one-way valve and throttling channel a. This ensures that whether the movable box's own power unit is working or the hydraulic power of the detachable garbage truck is being used, the high-pressure oil flowing from each hydraulic tank circulates back to its respective tank after operation. This prevents interference between the two hydraulic systems of the movable box and the detachable garbage truck, ensuring their normal operation and enabling the forced unloading function to function correctly. Currently, two L-shaped three-way ball valves, by switching between different positions, ensure that the oil circuit of the rear door cylinder is cut off when the movable box is operating normally, preventing the rear door of the movable box from opening during normal operation. However, during the unloading state, the oil circuit of the detachable garbage truck can be connected to the oil circuit of the rear door cylinder, using the power of the detachable garbage truck to open the rear door of the movable box. The power switching valve group is used to ensure that when the detachable garbage truck is operating normally, power can be input to the hydraulic control valve group of the upper structure, ensuring the normal realization of the upper structure function of the detachable garbage truck. When the movable box needs to unload, it can also transmit the power of the detachable garbage truck to the various functional mechanisms of the movable box, ensuring that the movable box completes the forced unloading function. Through flexible switching, it is both efficient and safe and reliable.

[0007] Compared with existing technologies, the beneficial effects of this invention are as follows: Previously, when garbage could not be emptied or was not emptied completely from the mobile container, manual handling was required, which seriously affected its efficiency and effectiveness. Especially in some northern regions, where winter temperatures are low, garbage is more likely to freeze inside the mobile container, and when it cannot be cleaned, it can only be taken away from the landfill with the garbage. This system completely solves the problem of garbage sticking to the mobile container and not being able to be emptied completely, eliminates the drawbacks of the mobile container, expands its advantages, and makes the application scenarios of the mobile container more extensive.

[0008] As a further improvement of the present invention, the hydraulic control valve group is equipped with a first two-position four-way solenoid valve, a second two-position four-way solenoid valve, a third two-position four-way solenoid valve, a fourth two-position four-way solenoid valve, and a hydraulic lock II. The A port of the first two-position four-way solenoid valve and the A port of the second two-position four-way solenoid valve are connected in parallel and serve as the A01 port of the hydraulic control valve group. The B port of the first two-position four-way solenoid valve is connected to the B port of the second two-position four-way solenoid valve. The P port of the first two-position four-way solenoid valve serves as the B01 port of the hydraulic control valve group. The hydraulic control valve group internally has an inner channel I, an inner channel II, an inner channel III, and an inner channel IV. The T port of the first two-position four-way solenoid valve and the T port of the second two-position four-way solenoid valve are connected in parallel and connected to one end of the inner channel I. The other end of the inner channel I serves as the oil inlet P of the hydraulic control valve group. An overflow valve is provided on the inner channel I. The P port of the second two-position four-way solenoid valve is connected to the A port of the third two-position four-way solenoid valve. One side of the inner channel is connected to one end of the third inner channel. The other end of the third inner channel is connected to the P port of the third two-position four-way solenoid valve. The B port of the third two-position four-way solenoid valve is connected to the P port of the fourth two-position four-way solenoid valve. One side of the inner channel is also connected to one end of the fourth inner channel. The other end of the fourth inner channel is connected to one end of the second inner channel. The other end of the second inner channel serves as the return port T of the hydraulic control valve group. The second inner channel is equipped with a return oil filter. The T ports of the third two-position four-way solenoid valve and the fourth two-position four-way solenoid valve are connected in parallel and connected to one end of the second inner channel. The B port of the third two-position four-way solenoid valve is also connected to one end of the second inner channel via a relief valve. The A and B ports of the fourth two-position four-way solenoid valve are respectively connected to the two inlets of the second hydraulic lock. The two outlets of the second hydraulic lock serve as the A02 and B02 ports of the hydraulic control valve group. One side of the inner channel is connected to a check valve and a pressure switch. The check valve is connected to a pressure gauge. The pressure gauge measures the oil pressure, and the pressure switch detects the oil pressure to control the pusher cylinder to switch pressures, so that the pusher cylinder pushes the push plate to compress the waste with different pressures (high pressure oil, low pressure oil); the second hydraulic lock is a stacked hydraulic lock.When the first two-position four-way solenoid valve is energized, it operates in the right position, with port P connected to port A, while ports B and T are closed and not connected. When the first two-position four-way solenoid valve is de-energized, it operates in the left position under the action of the spring, with port P connected to port B, while ports A and T are closed and not connected. When the second two-position four-way solenoid valve is energized, it operates in the right position, with port P connected to port B and port A connected to port T. When the second two-position four-way solenoid valve is de-energized, it operates in the left position under the action of the spring, with port P connected to port A and port B connected to port T. When the third two-position four-way solenoid valve is energized, the valve operates in the left position, with port P connected to port B and port A connected to port T. When the third two-position four-way solenoid valve is de-energized, the valve operates in the right position under the action of spring force, with port P connected to port A and port B connected to port T. When the fourth two-position four-way solenoid valve is energized, the valve operates in the left position, with port P connected to port B and port A connected to port T. When the fourth two-position four-way solenoid valve is de-energized, the valve operates in the right position, with port P connected to port A and port B connected to port T.

[0009] As a further improvement of the present invention, the top door cylinder, bucket lifting cylinder, and push head cylinder on the movable box are each provided with two cylinders on the left and right sides respectively. The A01 port of the hydraulic control valve group is connected to the rodless chamber of the two push head cylinders via a tee, and the B01 port of the hydraulic control valve group is connected to the rod chamber of the two push head cylinders via a tee. The A02 port of the hydraulic control valve group is connected to a throttle valve, and the outlet of the throttle valve is connected to the inlet of the tee block. One end of the tee block is connected to the rod chamber of the two bucket lifting cylinders via a tee, and the other end of the tee block is connected to the inlet A1 of the sequence valve. The outlet A2 of the sequence valve is connected to the rodless chamber of the two top door cylinders via a tee. The B02 port of the hydraulic control valve group is also connected to a throttle valve inlet, and the outlet of the throttle valve is connected to the inlet of the tee block. One end of the tee block is connected to the inlet B2 of the sequence valve, and the other end of the tee block is connected to the rod chamber of the two top door cylinders via a tee. The outlet B1 of the sequence valve is connected to the rodless chamber of the two bucket lifting cylinders via a tee. The hydraulic control valve assembly on the movable box has four two-position four-way solenoid valves stacked on top of it. The third two-position four-way solenoid valve acts as a selector valve. By switching between the two positions of the third two-position four-way solenoid valve, the high-pressure oil from the power unit can be used to control the action of the pusher cylinder or the bucket lifting cylinder and door jacking cylinder. At the same time, the two actions can be interlocked to ensure that when the pusher cylinder is in motion, the bucket lifting cylinder and door jacking cylinder will not move, and vice versa. The first two-position four-way solenoid valve and the second two-position four-way solenoid valve are used together to control the action of the pusher cylinder. By coordinating the switching of the first two two-position four-way solenoid valves, the pusher cylinder can achieve three actions: rapid forward movement, normal forward movement, and retraction. At the same time, two different compression forces are achieved by the pusher compressing the garbage. The fourth two-position four-way solenoid valve is used to control the action of the bucket lifting cylinder and door jacking cylinder. A hydraulic lock is stacked on top to ensure that the action of the bucket lifting cylinder and door jacking cylinder can be reliably stopped at any position. The sequence valve described above is used to realize the sequential operation of the lifting mechanism (bucket support) and the top cover mechanism (top door). During operation, hydraulic oil first enters the rod chamber of the top door cylinder to open the top door. As the pressure rises, the hydraulic oil enters the rodless chamber of the bucket lifting cylinder through the sequence valve B2 port to lift the garbage can. After the garbage is emptied, the hydraulic oil in the opposite direction first enters the rod chamber of the bucket lifting cylinder to lower the lifting mechanism. After the pressure rises, the pressurized oil opens the sequence valve A1 port to enter the rodless chamber of the top door cylinder to close the top cover mechanism. Thus, when loading, the top door is opened first and then the garbage can is lifted to load the material. After emptying the material, the garbage can is lowered first and then the top door is closed.

[0010] As a further improvement of the present invention, the dual-power control valve group integrates a two-position three-way hydraulic control valve. The P1 and P0 ports of the dual-power control valve group are directly connected via an internal channel. A check valve is provided on the internal channel connecting the P2 and P0 ports of the dual-power control valve group. Hydraulic oil flows from P2 to P0 through the check valve and flows from P0 to P2, where it is blocked by the check valve. A throttling channel a is connected to the internal channel between the P2 port and the check valve of the dual-power control valve group. The other end of the throttling channel a is connected to the control port PIL of the two-position three-way hydraulic control valve. Port 3 of the two-position three-way hydraulic control valve serves as the T0 port of the dual-power control valve group, and ports 2 and 4 serve as the T1 and T2 ports of the dual-power control valve group, respectively. When there is no pressurized oil in the throttling channel a, the two-position three-way hydraulic control valve operates in the right position under the action of the right-end spring. T0 and T1... When there is pressurized oil in throttling channel a, the two-position three-way hydraulic control valve operates in the left position, T0 and T2 are connected, and T1 is cut off. When hydraulic oil enters the dual-power control valve group from port P1, it exits from port P0, and there is no oil in throttling channel a; when hydraulic oil enters the dual-power control valve group from port P2, it exits from port P0, and there is oil in throttling channel a.

[0011] As a further improvement of the present invention, the power switching valve assembly integrates a fifth two-position four-way solenoid valve. The power switching valve assembly is respectively provided with ports P, T, A, B, C, and D. When the fifth two-position four-way solenoid valve is not energized, it operates in the right position under the action of a spring. At this time, port P of the power switching valve assembly is connected to port B through an internal channel, and port A is connected to port T through an internal channel. When the fifth two-position four-way solenoid valve is energized, it operates in the left position. At this time, port P of the power switching valve assembly is connected to port A through an internal channel, and port B is connected to port T through an internal channel. Ports C and D of the power switching valve assembly are both connected through internal channels. The hydraulic oil in the hydraulic tank is always connected to port T; the hydraulic oil inside the hydraulic tank is connected to the inlet of the ball valve via a pipeline, the outlet of the ball valve is connected to the inlet of the plunger pump on the chassis of the detachable garbage truck, the outlet of the plunger pump is connected to the inlet P of the power switching valve group, and the return port T of the power switching valve group is connected to the return filter element of the hydraulic oil tank; the A port of the power switching valve group is connected to the male quick-connect connector on the detachable garbage truck via a hydraulic hose, the C port of the power switching valve group is connected to the female quick-connect connector on the detachable garbage truck via a hydraulic hose, the B port of the power switching valve group is connected to the inlet P of the hydraulic control valve group of the movable box, and the D port of the power switching valve group is connected to the return port T of the hydraulic control valve group of the movable box.

[0012] As a further improvement of the present invention, the hydraulic oil tank 2 is equipped with a vane pump that can pump out hydraulic oil. An oil suction filter is installed on the vane pump. The hydraulic oil tank 2 is equipped with a level gauge and a sensor for detecting the hydraulic oil level and temperature. The hydraulic power unit has channels b, c, and d respectively. Channels b and c both pass through the hydraulic oil tank 2, and the portions of channels b and c inside the hydraulic oil tank 2 are not connected to the oil inside the hydraulic oil tank 2. The two ends of channel c are respectively connected to the inlet P of the hydraulic control valve group and the P0 port of the dual-power control valve group. The two ends of channel b are respectively connected to the return port T of the hydraulic control valve group and the T0 port of the dual-power control valve group. The two ends of channel d are respectively connected to the outlet of the vane pump and the P2 port of the dual-power control valve group. Two L-type three-way ball valves are provided. The P1 and T1 ports of the dual-power control valve group are respectively connected to the 2 ports of the two L-type three-way ball valves. The 1 ports of the two L-type three-way ball valves are respectively connected to the male and female quick-connect couplings on the movable box. The 3 ports of the two L-type three-way ball valves are respectively connected to the two inlets of the hydraulic lock. The two outlets of the hydraulic lock are respectively connected to the rod chamber and rodless chamber of the rear door cylinder. The L-type three-way ball valves are provided with ports 1, 2, and 3. The L-type three-way ball valves are provided with a rotatable handle with two positions. When the handle is in position one, ports 1 and 2 of the L-type three-way ball valves are connected. When the handle is moved to position two, ports 1 and 3 of the L-type three-way ball valves are connected. The T2 port of the dual-power control valve group is connected to the inside of the hydraulic oil tank. The hydraulic lock is a tubular hydraulic lock. A rear door cylinder is installed on the rear door of the movable box to control the opening and closing of the rear door. A hydraulic lock is installed on the pipeline of the rear door cylinder to reliably lock the rear door cylinder and ensure that the rear door is reliably locked. The two ends of the two pipelines of the rear door cylinder are respectively equipped with male and female quick-connect connectors. The rear door hydraulic cylinder is independent of the power unit of the movable box and does not receive power from the power unit of the movable box. When the movable box is loaded onto the hooklift truck (detachable garbage truck), the male and female quick-connect connectors reserved on the hooklift truck will connect with the male and female quick-connect connectors reserved on the pipeline of the rear door cylinder.

[0013] As a further improvement of the present invention, a locking block is rotatably connected to the movable box, and the locking block is provided with a locking groove. The piston rod of the rear door cylinder is hinged to the locking block, and the rear door is provided with a locking rod that can be engaged with the locking groove. The locking rod is correspondingly arranged with the locking block. After the rear door cylinder drives the locking block to rotate, the locking groove separates from the locking rod, and the rear door opens under its own weight. Attached Figure Description

[0014] Figure 1 This is a diagram showing the unloading state of the detachable garbage truck of the present invention.

[0015] Figure 2 This is a diagram showing the loading and unloading state of the detachable garbage truck of the present invention.

[0016] Figure 3 for Figure 2 A magnified view of point Q in the middle.

[0017] Figure 4 This is a schematic diagram of the structure of the movable box.

[0018] Figure 5 This is a hydraulic schematic diagram of the present invention.

[0019] Figure 6 for Figure 5 A magnified view of a portion of the image.

[0020] Figure 7 This is a schematic diagram of the hydraulic control valve assembly.

[0021] Figure 8 This is a schematic diagram of the structure of a dual-power control valve group.

[0022] Figure 9 This is a schematic diagram of the power switching valve assembly.

[0023] Figure 10 This is a schematic diagram of an L-type three-way ball valve.

[0024] Figure 11 This is a schematic diagram of a sequence valve.

[0025] The system includes: 1. Hydraulic oil tank one; 2. Ball valve; 3. Piston pump; 4. Power switching valve assembly; 5. Quick connector; 6. Hydraulic oil tank two; 7. Vane pump; 8. Relief valve; 9. First two-position four-way solenoid valve; 10. Second two-position four-way solenoid valve; 11. Push head cylinder; 12. Bucket lifting cylinder; 13. Door lifting cylinder; 14. Sequence valve; 15. Throttle valve; 16. Relief valve; 17. Hydraulic lock two; 18. Fourth two-position four-way solenoid valve; 19. Hydraulic control valve assembly; 20. Third two-position four-way solenoid valve; 21. Return oil filter; 22. Dual power control valve assembly; 23. Hydraulic lock one; 24. Rear door cylinder; 25. L-type three-way ball valve, 26 Demountable garbage truck, 27 Movable box, 27a Top door, 27b Bucket lifting bracket, 27c Rear door, 28 Inner passage one, 29 Inner passage two, 30 Inner passage three, 31 Inner passage four, 32 Check valve, 33 Pressure switch, 34 Two-position three-way hydraulic control valve, 35 Check valve, 36 Fifth two-position four-way solenoid valve, 37 Return oil filter element, 38 Suction oil filter, 39 Level gauge, 40 Locking block, 40a Locking groove, 41 Locking rod. Implementation

[0026] like Figure 1-11As shown, a mobile container forced unloading system of the present invention includes a detachable garbage truck 26 and a mobile container 27 corresponding to each other. The mobile container 27 has an openable top door 27a on its upper part, a flip-up bucket lifting bracket 27b on the front side of the mobile container 27, a push plate for pushing garbage inside the mobile container 27, and an openable rear door 27c on the rear side of the mobile container 27. The mobile container 27 is equipped with a top door cylinder 13 hinged to the top door 27a, a bucket lifting cylinder 12 hinged to the bucket lifting bracket 27b, a push head cylinder 11 driven by the push plate, and a control cylinder for the rear door. The rear door cylinder 24 for opening and closing door 27c is equipped with a hydraulic power unit on the movable box 27. The hydraulic power unit integrates a hydraulic oil tank 26, a hydraulic control valve group 19, a dual power control valve group 22, and an L-type three-way ball valve 25. The movable box 27 is also equipped with a quick-connect connector 5 male and a quick-connect connector 5 female. The detachable garbage truck 26 is equipped with a hydraulic oil tank 1 and a power switching valve group 4. The detachable garbage truck 26 is equipped with quick-connect connector 5 female and quick-connect connector 5 male corresponding to the movable box 27.

[0027] The hydraulic control valve assembly 19 integrates a first two-position four-way solenoid valve 9, a second two-position four-way solenoid valve 10, a third two-position four-way solenoid valve 20, a fourth two-position four-way solenoid valve 18, and a hydraulic lock 17. The A port of the first two-position four-way solenoid valve 9 and the A port of the second two-position four-way solenoid valve 10 are connected in parallel and serve as the A01 port of the hydraulic control valve assembly 19. The B port of the first two-position four-way solenoid valve 9 is connected to the B port of the second two-position four-way solenoid valve 10. The P port of the first two-position four-way solenoid valve 9 serves as the hydraulic control valve assembly 19. The hydraulic control valve assembly 19 has internal channels 28, 29, 30, and 31. The T-port of the first two-position four-way solenoid valve 9 and the T-port of the second two-position four-way solenoid valve 10 are connected in parallel to one end of the first internal channel 28. The other end of the first internal channel 28 serves as the oil inlet P of the hydraulic control valve assembly 19. An overflow valve 8 is installed on the first internal channel 28. The P-port of the second two-position four-way solenoid valve 10 is connected to the A-port of the third two-position four-way solenoid valve 20. The side of the first internal channel 28... One end of the inner channel 30 is connected to the other end of the inner channel 30, which is connected to the P port of the third two-position four-way solenoid valve 20. The B port of the third two-position four-way solenoid valve 20 is connected to the P port of the fourth two-position four-way solenoid valve 18. The side of the inner channel 1 28 is also connected to one end of the inner channel 4 31, which is connected to one end of the inner channel 2 29. The other end of the inner channel 2 29 serves as the return oil port T of the hydraulic control valve group 19. The inner channel 2 29 is equipped with a return oil filter 21. The T port of the third two-position four-way solenoid valve 20... The first two-position four-way solenoid valve 18 is connected in parallel to its T port and to one end of the second inner channel 29. The third two-position four-way solenoid valve 20 is also connected to one end of the second inner channel 29 via the relief valve 16. The A and B ports of the fourth two-position four-way solenoid valve 18 are connected to the two inlets of the second hydraulic lock 17, and the two outlets of the second hydraulic lock 17 serve as the A02 and B02 ports of the hydraulic control valve group 19, respectively. A one-way valve 32 and a pressure switch 33 are connected to the side of the first inner channel 28. The one-way valve 32 is connected to a pressure gauge. The pressure gauge measures the oil pressure, and the pressure switch 33 detects the oil pressure to control the pusher cylinder 11 to perform pressure conversion, so that the pusher cylinder 11 pushes the push plate to compress the garbage with different pressures (high pressure oil, low pressure oil). The second hydraulic lock 17 is a stacked hydraulic lock.

[0028] The movable box 27 has two top-door cylinders 13, bucket-lifting cylinders 12, and push-head cylinders 11, each corresponding to the left and right. The A01 port of the hydraulic control valve assembly 19 is connected to the rodless chambers of the two push-head cylinders 11 via a tee. The B01 port of the hydraulic control valve assembly 19 is connected to the rod chambers of the two push-head cylinders 11 via a tee. The A02 port of the hydraulic control valve assembly 19 is connected to a throttle valve 15. The outlet of the throttle valve 15 is connected to the inlet of a tee block. One end of the tee block's outlet is connected to the rod chambers of the two bucket-lifting cylinders 12 via a tee. The other end of the tee block's outlet is connected to the inlet A1 of a sequence valve 14. The outlet A2 of the sequence valve 14 is connected to the rodless chambers of the two top-door cylinders 13 via a tee. The B02 port of the hydraulic control valve assembly 19 is also connected to the inlet of a throttle valve 15. The outlet of the throttle valve 15 is connected to the inlet of a tee block. One end of the tee block's outlet is connected to the inlet B2 of the sequence valve 14. The oil outlet at the other end of the three-way block is connected to the rod chamber of the two top-door cylinders 13 via a three-way connection, and the outlet B1 of the sequence valve 14 is connected to the rodless chamber of the two bucket-lifting cylinders 12 via a three-way connection. Four two-position four-way solenoid valves are stacked on the hydraulic control valve group 19 on the movable box 27. The third two-position four-way solenoid valve 20 acts as a selector valve. By switching between the two positions of the third two-position four-way solenoid valve 20, the high-pressure oil from the power unit can be used to control the movement of the push-head cylinder 11 or the bucket-lifting cylinder 12 and the top-door cylinder 13. It can also interlock the two movements, ensuring that when the push-head cylinder 11 moves, the bucket-lifting cylinder 12 and the top-door cylinder 13 will not move, and vice versa. The first two-position four-way solenoid valve 9, the second two-position four-way solenoid valve 9, and the second two-position four-way solenoid valve 10... The four-way solenoid valve 10 is used to control the movement of the pusher cylinder 11. Through the coordinated switching of the first two-position four-way solenoid valve 9 and the second two-position four-way solenoid valve 10, the pusher cylinder 11 can achieve three movements: rapid forward movement, normal forward movement, and retraction. At the same time, the pusher compresses the garbage with two different compression forces. The fourth two-position four-way solenoid valve 18 is used to control the movement of the bucket lifting cylinder 12 and the door lifting cylinder 13. A hydraulic lock 17 is superimposed to ensure that the movement of the bucket lifting cylinder 12 and the door lifting cylinder 13 can be reliably stopped at any position. The sequence valve 14 described above is used to realize the sequential operation of the lifting mechanism (bucket support 27b) and the top cover mechanism (top door). During operation, hydraulic oil first enters the rod chamber of the top door cylinder 13 to open the top door. When the pressure rises, the hydraulic oil enters the rodless chamber of the bucket lifting cylinder 12 through the sequence valve 14B2 port to lift the garbage can. After the garbage is emptied, the hydraulic oil in the opposite direction first enters the rod chamber of the bucket lifting cylinder 12 to lower the lifting mechanism. When the pressure rises, the pressurized oil opens the sequence valve 14A1 port to enter the rodless chamber of the top door cylinder 13 to close the top cover mechanism. Thus, when loading, the top door is opened first and then the garbage can is lifted to load the material. After the material is emptied, the garbage can is lowered first and then the top door is closed.

[0029] The dual-power control valve assembly 22 integrates a two-position three-way hydraulic control valve 34. Ports P1 and P0 of the dual-power control valve assembly 22 are directly connected via an internal channel. A check valve 35 is installed on the internal channel connecting ports P2 and P0 of the dual-power control valve assembly 22. Hydraulic oil flows from P2 to P0 through the check valve 35 and flows from P0 to P2, where it is blocked by the check valve 35. A throttling channel a is connected to the internal channel between port P2 and check valve 35 of the dual-power control valve assembly 22. The other end of throttling channel a is connected to the control port PIL of the two-position three-way hydraulic control valve 34. Port 3 of the two-position three-way hydraulic control valve 34 serves as port T0 of the dual-power control valve assembly 22, and ports 2 and 4 serve as ports T1 and T2 of the dual-power control valve assembly 22, respectively. When there is no pressurized oil in throttling channel a, the two-position three-way hydraulic control valve 34 operates in the right position under the action of the spring at the right end. When there is pressurized oil in the throttling channel a, the two-position three-way hydraulic control valve 34 operates in the left position, T0 and T2 are connected, and T1 is cut off. When hydraulic oil enters the dual-power control valve group 22 from port P1, it exits from port P0, and there is no oil in the throttling channel a; when hydraulic oil enters the dual-power control valve group 22 from port P2, it exits from port P0, and there is oil in the throttling channel a.

[0030] The power switching valve assembly 4 integrates a fifth two-position four-way solenoid valve 36. The power switching valve assembly 4 has ports P, T, A, B, C, and D. When the fifth two-position four-way solenoid valve 36 is not energized, it operates in the right position under spring action. At this time, port P of the power switching valve assembly 4 is connected to port B via an internal channel, and port A is connected to port T via an internal channel. When the fifth two-position four-way solenoid valve 36 is energized, it operates in the left position. At this time, port P of the power switching valve assembly 4 is connected to port A via an internal channel, and port B is connected to port T via an internal channel. Ports C and D of the power switching valve assembly 4 are always connected to port T via internal channels. Hydraulic oil tank one... 1. The internal hydraulic oil is connected to the inlet of ball valve 2 via a pipeline. The outlet of ball valve 2 is connected to the inlet of plunger pump 3 of the chassis of the detachable garbage truck 26. The outlet of plunger pump 3 is connected to the oil inlet P port of power switching valve group 4. The oil return T port of power switching valve group 4 is connected to the oil return filter element 37 of hydraulic oil tank 1. The A port of power switching valve group 4 is connected to the male quick-connect connector 5 on the detachable garbage truck 26 via a hydraulic hose. The C port of power switching valve group 4 is connected to the female quick-connect connector 5 on the detachable garbage truck 26 via a hydraulic hose. The B port of power switching valve group 4 is connected to the oil inlet P of hydraulic control valve group 19 of movable box 27. The D port of power switching valve group 4 is connected to the oil return T of hydraulic control valve group 19 of movable box 27.

[0031] The hydraulic oil tank 26 is equipped with a vane pump 7 that pumps hydraulic oil out. The vane pump 7 is fitted with an oil suction filter 38. The hydraulic oil tank 26 is equipped with a level gauge 39 and a sensor for detecting the hydraulic oil level and temperature. The hydraulic power unit has three channels: b, c, and d. Channels b and c pass through the hydraulic oil tank 26, but the portions of channels b and c inside the tank are not connected to the oil inside. Channel c is connected to the inlet P of the hydraulic control valve group 19 and the P0 port of the dual-power control valve group 22, respectively. Channel b is connected to the return port T of the hydraulic control valve group 19 and the T0 port of the dual-power control valve group 22, respectively. Channel d is connected to the outlet of the vane pump 7 and the P2 port of the dual-power control valve group 22, respectively. An L-type three-way ball valve 25 is provided with… The two dual-power control valve groups 22 have P1 and T1 ports connected to the 2 ports of two L-type three-way ball valves 25 respectively. The 1 ports of the two L-type three-way ball valves 25 are connected to the male and female quick-connect fittings 5 ​​on the movable box 27 respectively. The 3 ports of the two L-type three-way ball valves 25 are connected to the two inlets of the hydraulic lock 23 respectively. The two outlets of the hydraulic lock 23 are connected to the rod chamber and rodless chamber of the rear door cylinder 24 respectively. The L-type three-way ball valves 25 are provided with ports 1, 2, and 3. The L-type three-way ball valves 25 are provided with a rotatable handle with two positions. When the handle is in position one, ports 1 and 2 of the L-type three-way ball valves 25 can be connected. When the handle is moved to position two, ports 1 and 3 of the L-type three-way ball valves 25 can be connected. The T2 port of the dual-power control valve group 22 is connected to the inside of the hydraulic oil tank 6. Hydraulic lock 23 is a tubular hydraulic lock. A rear door cylinder 24 is installed on the rear door 27c of the movable box 27 to control the opening and closing of the rear door. Hydraulic lock 23 is installed on the pipeline of the rear door cylinder 24 to reliably lock the rear door cylinder 24 and ensure that the rear door is reliably locked. The two ends of the two pipelines of the rear door cylinder 24 are respectively equipped with male and female quick-connect connectors 5. The rear door hydraulic cylinder is independent of the power unit of the movable box 27 and does not receive power from the power unit of the movable box 27. When the movable box 27 is loaded onto the hook-lift truck (detachable garbage truck 26), the male and female quick-connect connectors 5 reserved on the hook-lift truck will connect with the male and female quick-connect connectors 5 reserved on the pipeline of the rear door cylinder 24.

[0032] A locking block 40 is rotatably connected to the movable box 27. The locking block 40 has a locking groove 40a. The piston rod of the rear door cylinder 24 is hinged to the locking block 40. The rear door has a locking rod 41 that can engage with the locking groove 40a. The locking rod 41 is correspondingly set to the locking block 40. After the rear door cylinder 24 drives the locking block 40 to rotate, the locking groove 40a separates from the locking rod 41, and the rear door opens under its own weight.

[0033] The top door cylinder 13 of this invention controls the opening and closing of the top door. The garbage bin is placed on the lifting bracket 27b, and the lifting cylinder 12 controls the lifting bracket 27b to flip upwards, allowing the garbage to be poured into the movable box 27. The pusher cylinder 11 controls the movement of the pusher plate mechanism inside the movable box 27, compressing and pushing the garbage. The dual-power control valve group 22 controls the two-position three-way hydraulic control valve 34 to operate in different positions through an internal one-way valve and throttling channel a. This ensures that whether the movable box 27's own power unit is working or the hydraulic power of the detachable garbage truck 26 is being used, the high-pressure oil flowing from each hydraulic tank can circulate back to its respective hydraulic tank after the work is completed. This prevents interference between the two hydraulic systems of the movable box 27 and the detachable garbage truck 26, ensuring the normal operation of both hydraulic systems and enabling the forced unloading function to be implemented correctly. Two L-shaped three-way ball valves 25, by switching between different positions, ensure that the oil circuit of the rear door cylinder 24 is cut off when the movable box 27 is operating normally, preventing the rear door of the movable box 27 from being opened during normal operation. However, during the unloading state, the oil circuit of the detachable garbage truck 26 can be connected to the oil circuit of the rear door cylinder 24, using the power of the detachable garbage truck 26 to open the rear door of the movable box 27. The power switching valve group 4 is used to ensure that when the detachable garbage truck 26 is working normally, the power can be input to the hydraulic control valve group 19 of the upper structure, ensuring the normal realization of the upper structure function of the detachable garbage truck 26. When the movable box 27 needs to unload, the power of the detachable garbage truck 26 can be transmitted to the various functional mechanisms of the movable box 27, ensuring that the movable box 27 completes the forced unloading function. Through flexible switching, it is both efficient and safe and reliable.

[0034] When the mobile box of the present invention is in the working state of collecting and storing garbage: when the garbage bins at each garbage collection point are full and need to be emptied, the garbage bins are pushed to the front of the mobile box and hung on the lifting mechanism located in front of the mobile box. Then, the motor is started, the motor drives the hydraulic pump to rotate, and the hydraulic pump outputs high-pressure oil. The high-pressure hydraulic oil enters the P2 port of the dual power control valve group 22 from the hydraulic pump outlet through channel d. Then, inside the dual power control valve group 22, on the one hand, it pushes open the check valve and flows out from the P0 port into the internal channel c of the power unit and then into the oil inlet P of the hydraulic control valve group 19. On the other hand, it flows into the oil passage a inside the dual power control valve group 22 and enters the left control chamber PIL chamber of the two-position three-way hydraulic control valve, so that the valve core of the two-position three-way hydraulic control valve overcomes the spring force on the right and moves to the right. The two-position three-way hydraulic control valve works in the left position. At this time, the T0 port and the T2 port are connected, and the T1 port is closed. High-pressure oil enters the hydraulic control valve group 19 through port P. The solenoid directional valve 20 is energized and operates in the left position. At this time, port P and port B are connected. High-pressure oil flows through port B of valve 20 to the solenoid control valve 18. The solenoid valve 18 is energized and operates in the left position. At this time, port P and port B are connected. High-pressure oil flows out through port B02 of the hydraulic control valve group 19, opening the one-way valve in the throttle valve 15 and first entering the rod chamber of the top door cylinder. The top door cylinder retracts, and the top cover of the movable box opens under the action of the top door cylinder. When the top door cylinder is in position, the hydraulic oil pressure increases. High-pressure oil opens the sequence valve through port B2 of the sequence valve 14 and enters the rodless chamber of the bucket lifting cylinder. The piston rod of the bucket lifting cylinder extends. Under the action of the bucket lifting cylinder, the garbage can is lifted to the discharge port of the movable box and the garbage is dumped into the movable box. After the material is received, the solenoid directional valve 18 is de-energized and operates in the right position. At this time, port P and port A are connected. High-pressure hydraulic oil flows out through port A02 of hydraulic control valve group 19 via the right position of solenoid valve 18. The high-pressure oil opens the one-way valve of throttle valve 15 and enters the rod chamber of the bucket lifting cylinder. The piston rod of the bucket lifting cylinder retracts, and the lifting mechanism lowers the garbage bin. After the garbage bin falls into place, the hydraulic oil pressure rises. The high-pressure oil opens the sequence valve through port A1 of sequence valve 14 and enters the rodless chamber of the top door cylinder. The piston rod of the top door cylinder extends and pushes the upper cover of the movable box to close, completing one material unloading process. When the garbage accumulates to a certain extent at the unloading port, it is necessary to push the garbage into the garbage bin. At this time, the solenoid directional valve 20 is de-energized and operates in the right position. At this time, port P and port A are connected. The high-pressure oil is switched to enter the push head control valves 9 and 10.At this time, the solenoid directional valve 10 is de-energized and operates in the left position, with port P and port A connected. Simultaneously, the solenoid valve 9 is energized and operates in the right position, with port P and port A connected. At this time, the rod-side and rodless-side chambers of the two pusher cylinders are connected, and high-pressure oil enters both the rodless-side and rod-side chambers of the pusher cylinder. Although the hydraulic oil pressure in the two chambers of the pusher cylinder is connected, the piston rod of the pusher extends under the action of the pressure difference between the two chambers because the pressure-bearing area of ​​the rodless-side chamber is greater than that of the rod-side chamber. The pusher cylinder is connected to form a differential circuit through the solenoid directional valves 9 and 10. The pusher cylinder drives the pusher to quickly compress the waste. After the waste is compacted to a certain extent, the pusher resistance increases, and the system pressure rises. At this time, the solenoid directional valve 9 is de-energized and operates in the left position, with port P and port A disconnected. The two chambers of the pusher cylinder are no longer connected, the differential oil circuit of the pusher cylinder fails, and the pusher moves forward slowly to carry out the strong compression stage, further compacting the waste. When solenoid directional valve 9 is de-energized and valve 10 is energized, solenoid valve 9 operates in the left position, and valve 10 operates in the right position. High-pressure oil enters the rod chamber of the pusher cylinder, the piston rod of the pusher cylinder retracts, and the pusher moves backward. Relief valve 8 limits the maximum pressure in the pusher cylinder's oil circuit, and relief valve 16 limits the maximum pressure in the bucket lifting and door-lifting cylinder's oil circuit. All return oil from the hydraulic control valve assembly 19 flows through the internal return oil filter 21 into the power unit's internal channel b, and then enters the dual-power control valve assembly 22 through port T0. Because the two-position three-way hydraulic control valve inside the dual-power control valve assembly 22 operates in the left position under the action of high-pressure oil, ports T0 and T2 are connected. After passing through the dual-power control valve assembly 22, the return oil flows out through port T2 and returns to the hydraulic oil tank 6, ensuring that the hydraulic oil from the power unit eventually returns to the power unit, completing one cycle.

[0035] When the movable container of the present invention is in the unloading state: when the movable container is full of garbage and needs to be unloaded, the detachable garbage truck uses its upper-mounted hook arm to hook the movable container onto the detachable garbage truck and fix it. Then, the male and female heads of the two quick-connect connectors 5 are connected accordingly. At this time, the movable container loses its power unit because it has no power supply. After arriving at the landfill, first, operate the two L-shaped three-way ball valves 25 to connect ports 1 and 3, and close port 2. At this time, start the chassis pump of the detachable garbage truck. High-pressure oil is output from the chassis pump and enters the power switching valve group through port P. The two-position four-way solenoid valve on the power switching valve group is energized and operates in the left position, connecting port P to port A. High-pressure oil flows out through port A and into port 1 of the L-shaped three-way ball valve 25. Since ports 1 and 3 of the L-shaped three-way ball valve are connected at this time, hydraulic oil enters the rodless chamber of the rear door cylinder 24 after passing through the hydraulic lock 23. The piston rod of the rear door cylinder extends, pushing the rear door locking mechanism to open, and the rear door opens. After the rear door opens, rotate the handle of the L-shaped three-way ball valve 25 to connect ports 1 and 2, and close port 3. Then, the two-position four-way solenoid valve on power switching valve group 4 is de-energized and operates in the right position. At this time, port P and port B are connected, and high-pressure oil flows out through port B of the power switching valve group and enters the hydraulic control valve group of the detachable garbage truck. This controls the upper structure of the detachable garbage truck to lift and unload the movable box. If the garbage in the movable box is not completely emptied after lifting, the forced unloading function needs to be activated. This energizes the two-position four-way solenoid directional valve on power switching valve group 4 and operates in the left position, with port P connected to port A. The high-pressure oil from the chassis plunger pump flows out through port A of power switching valve group 4. Because ports 1 and 2 of the two L-type three-way ball valves are connected and port 3 is closed at this time, the high-pressure oil directly enters port P1 of the dual power control valve group 22. Inside the dual power control valve group 22, ports P1 and P0 are connected. Under the action of the pressure oil, the one-way valve inside the dual power control valve group 22... With the valve closed, high-pressure oil flows out through port P0 and enters port P of the hydraulic control valve group 19 of the power unit of the movable box through channel c inside the hydraulic oil tank. At this time, since there is no high-pressure oil passing through channel a inside the dual power control valve group 22, the two-position three-way hydraulic control valve operates in the right position under the action of the spring at the right end. T0 and T1 are connected, and T2 is cut off. Since the motor of the power unit on the movable box has no power, it cannot drive the hydraulic pump to rotate. The solenoid directional valves on the hydraulic control valve group 19 are also in a de-energized state. Solenoid directional valve 20 operates in the right position, and solenoid directional valves 9 and 10 operate in the left position. After the high-pressure oil enters the hydraulic control valve group 19 through port P, it flows into the left position of solenoid directional valve 10 through the right position of solenoid directional valve 20, and then enters the rodless chamber of the pusher cylinder. The pusher mechanism is pushed out, pushing the garbage in the movable box out of the box, completing the forced unloading function.At this time, the return oil from the rod chamber of the pusher cylinder passes through the return oil filter in the hydraulic control valve group 19 and enters the channel b inside the hydraulic oil tank 6 of the movable box power unit, entering the T0 port of the dual power control valve group. Since T0 and T1 are connected and T2 is cut off inside the dual power control valve group, the return oil flows out through the T1 port of the dual power control valve group and enters the C port of the power switching valve group 4 through the L-type three-way valve 25. Since the C port is connected to the return oil port T port, the hydraulic oil returns to the hydraulic oil tank of the detachable garbage truck, ensuring that when the movable box power unit is working and the power of the detachable garbage truck is working, the hydraulic oil flowing out of their respective hydraulic oil tanks can return to their respective hydraulic oil tanks, without causing hydraulic oil loss.

[0036] The advantages of this invention are as follows: Previously, when garbage could not be emptied from the mobile container or could not be emptied completely, manual handling was required, which seriously affected its efficiency and effectiveness. Especially in some northern regions, where winter temperatures are low, garbage is more likely to freeze inside the mobile container, and when it cannot be cleaned, it can only be taken away from the landfill with the garbage. This system completely solves the problem of garbage sticking to the mobile container and not being able to be emptied completely, eliminating the drawbacks of the mobile container, expanding its advantages, and making the application scenarios of the mobile container more extensive.

[0037] This invention is not limited to the above embodiments. Based on the technical solutions disclosed in this invention, those skilled in the art can make some substitutions and modifications to some of the technical features without creative effort, and all such substitutions and modifications are within the protection scope of this invention.

Claims

1. A mobile container forced unloading system, comprising a detachable garbage truck and a mobile container corresponding to each other, the mobile container having an openable top door at its upper part, a flip-up bucket-lifting bracket on the front side of the mobile container, a push plate for pushing garbage inside the mobile container, and an openable rear door on the rear side of the mobile container, wherein the mobile container is respectively provided with a top door cylinder hinged to the top door, a bucket-lifting cylinder hinged to the bucket-lifting bracket, a push head cylinder drivenly connected to the push plate, and a rear door cylinder for controlling the opening and closing of the rear door, characterized in that, The movable box is equipped with a hydraulic power unit, which integrates a second hydraulic oil tank, a hydraulic control valve group, a dual power control valve group, and an L-type three-way ball valve. The movable box also has male and female quick-connect couplings. The detachable garbage truck is equipped with a first hydraulic oil tank and a power switching valve group. The detachable garbage truck has male and female quick-connect couplings corresponding to the movable box, respectively. The hydraulic control valve group integrates a first two-position four-way solenoid valve, a second two-position four-way solenoid valve, a third two-position four-way solenoid valve, a fourth two-position four-way solenoid valve, and a second hydraulic lock. The A port of the first two-position four-way solenoid valve and the... The A ports of the two two-position four-way solenoid valves are connected in parallel and serve as the A01 port of the hydraulic control valve group. The B ports of the first two-position four-way solenoid valve and the second two-position four-way solenoid valve are connected. The P port of the first two-position four-way solenoid valve serves as the B01 port of the hydraulic control valve group. The hydraulic control valve group has internal channels one, two, three, and four. The T ports of the first two-position four-way solenoid valve and the second two-position four-way solenoid valve are connected in parallel and connected to one end of internal channel one. The other end of internal channel one serves as the oil inlet P of the hydraulic control valve group. An overflow valve is installed on internal channel one. The P port of the second two-position four-way solenoid valve is connected to the A port of the third two-position four-way solenoid valve. One end of internal channel three is connected to the side of internal channel one. The other end of channel three is connected to port P of the third two-position four-way solenoid valve. Port B of the third two-position four-way solenoid valve is connected to port P of the fourth two-position four-way solenoid valve. One side of the inner channel is also connected to one end of the inner channel four. The other end of the inner channel four is connected to one end of the inner channel two. The other end of the inner channel two serves as the return port T of the hydraulic control valve assembly. A return oil filter is installed on the inner channel two. Ports T of the third two-position four-way solenoid valve and the fourth two-position four-way solenoid valve are connected in parallel and connected to one end of the inner channel two. Port B of the third two-position four-way solenoid valve is also connected to one end of the inner channel two via a relief valve. Ports A and B of the fourth two-position four-way solenoid valve are respectively connected to the two inlets of hydraulic lock two. The two outlets of hydraulic lock two are... The A02 and B02 ports of the hydraulic control valve group are respectively used as ports; a one-way valve and a pressure switch are respectively connected to one side of the inner channel, and the one-way valve is connected to the pressure gauge; the top door cylinder, bucket lifting cylinder and push head cylinder on the movable box are each provided with two on the left and right sides respectively; the A01 port of the hydraulic control valve group is connected to the rodless chamber of the two push head cylinders via a three-way valve; the B01 port of the hydraulic control valve group is connected to the rod chamber of the two push head cylinders via a three-way valve; the A02 port of the hydraulic control valve group is connected to the throttle valve; the outlet of the throttle valve is connected to the oil inlet of the three-way block; the oil outlet at one end of the three-way block is connected to the rod chamber of the two bucket lifting cylinders via a three-way valve; the oil outlet at the other end of the three-way block is connected to the inlet A1 of the sequence valve; the outlet A2 of the sequence valve is connected to the rodless chamber of the two top door cylinders via a three-way valve.The B02 port of the hydraulic control valve group is also connected to the inlet of a throttle valve. The outlet of the throttle valve is connected to the inlet of a three-way block. One end of the three-way block is connected to the inlet B2 of a sequence valve. The other end of the three-way block is connected to the rod chamber of the two top valve cylinders via a three-way connection. The outlet B1 of the sequence valve is connected to the rodless chamber of the two bucket lifting cylinders via a three-way connection. The dual-power control valve group integrates a two-position three-way hydraulic control valve. The P1 and P0 ports of the dual-power control valve group are directly connected through an internal channel. A check valve is provided on the internal channel connecting the P2 and P0 ports of the dual-power control valve group. When the hydraulic oil flows from P2 to P0, it is conducted through the check valve. When it flows from P0 to P2, it is stopped by the check valve. A throttling channel a is connected to the internal passage between port P2 of the dual-power control valve assembly and the check valve. The other end of throttling channel a is connected to the control port PIL of a two-position three-way hydraulic control valve. Port 3 of the two-position three-way hydraulic control valve serves as port T0 of the dual-power control valve assembly. Ports 2 and 4 of the two-position three-way hydraulic control valve serve as ports T1 and T2 of the dual-power control valve assembly, respectively. When there is no pressurized oil in throttling channel a, the two-position three-way hydraulic control valve operates in the right position under the action of the spring at the right end, with T0 and T1 connected and T2 closed. When there is pressurized oil in throttling channel a, the two-position three-way hydraulic control valve operates in the left position, with T0 and T2 connected. When the power switching valve assembly is not energized, T1 is cut off; the power switching valve assembly integrates a fifth two-position four-way solenoid valve, which is provided with ports P, T, A, B, C, and D respectively. When the fifth two-position four-way solenoid valve is not energized, it operates in the right position under the action of the spring. At this time, port P of the power switching valve assembly is connected to port B through an internal channel, and port A is connected to port T through an internal channel. When the fifth two-position four-way solenoid valve is energized, it operates in the left position. At this time, port P of the power switching valve assembly is connected to port A through an internal channel, and port B is connected to port T through an internal channel. Ports C and D of the power switching valve assembly are always connected through internal channels. The hydraulic oil in the hydraulic tank is connected to the ball valve inlet via a pipeline. The ball valve outlet is connected to the plunger pump inlet of the chassis of the detachable garbage truck. The plunger pump outlet is connected to the inlet P of the power switching valve group. The return T of the power switching valve group is connected to the return filter element of the hydraulic oil tank. The A port of the power switching valve group is connected to the quick-connect male connector on the detachable garbage truck via a hydraulic hose. The C port of the power switching valve group is connected to the quick-connect female connector on the detachable garbage truck via a hydraulic hose. The B port of the power switching valve group is connected to the inlet P of the hydraulic control valve group of the movable box. The D port of the power switching valve group is connected to the return T of the hydraulic control valve group of the movable box.The hydraulic oil tank 2 is equipped with a vane pump that can pump out hydraulic oil. The vane pump is fitted with an oil suction filter. The hydraulic oil tank 2 is equipped with a level gauge and a sensor for detecting the hydraulic oil level and temperature. The hydraulic power unit has three channels: b, c, and d. Channels b and c pass through the hydraulic oil tank 2, but the portions of channels b and c inside the tank are not connected to the oil inside. Channel c is connected to the inlet P of the hydraulic control valve group and the P0 port of the dual-power control valve group. Channel b is connected to the return port T of the hydraulic control valve group and the T0 port of the dual-power control valve group. Channel d is connected to the outlet of the vane pump and the P2 port of the dual-power control valve group. The L-type three-way ball valve... The system has two sets of valves. Ports P1 and T1 of the dual-power control valve group are connected to ports 2 of two L-shaped three-way ball valves, respectively. Ports 1 of the two L-shaped three-way ball valves are connected to the male and female quick-connect fittings on the movable box, respectively. Ports 3 of the two L-shaped three-way ball valves are connected to the two inlets of hydraulic lock one, respectively. The two outlets of hydraulic lock one are connected to the rod-side and rodless-side chambers of the rear door cylinder, respectively. Each L-shaped three-way ball valve has ports 1, 2, and 3, and a rotatable handle with two positions. In position one, ports 1 and 2 of the L-shaped three-way ball valve are connected; in position two, ports 1 and 3 are connected. Port T2 of the dual-power control valve group is connected to the interior of hydraulic oil tank two.

2. The mobile box forced unloading system according to claim 1, characterized in that, A locking block is rotatably connected to the movable box. The locking block has a locking groove. The piston rod of the rear door cylinder is hinged to the locking block. The rear door has a locking rod that can be engaged with the locking groove. The locking rod is correspondingly set to the locking block.

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