A mobile garbage compression device

Abstract

The present invention discloses a mobile garbage compression device, comprising: a compression device cylinder body; a lifting oil cylinder for actuating a feeding hopper; a push head oil cylinder for actuating a push head; a power unit, which is slidably installed in the compression device cylinder body and extends along the width direction of the compression device cylinder body; wherein, the push head oil cylinder and the lifting oil cylinder are controlled by a hydraulic control system arranged in the power unit, the hydraulic control system includes a first oil pump and a second oil pump as well as a combined action position and a split action position; at the combined action position, the hydraulic control system controls the first oil pump and the second oil pump to jointly supply oil to the push head oil cylinder; and at the split action position, the hydraulic control system controls the first oil pump to supply oil to the push head oil cylinder and controls the second oil pump to supply oil to the lifting oil cylinder.

Description

Technical Field

[0001] The present invention relates to a garbage compression device, and particularly to a mobile garbage compression device. Background Art

[0002] In urban garbage management, garbage bins are often set up in each residential area. People put domestic garbage into the garbage bins, and then garbage trucks regularly collect the garbage in the bins at each garbage collection point. In order to increase the loading capacity, garbage trucks often come with garbage compression devices. The garbage in the bins is poured into the garbage truck and then compressed.

[0003] CN106089828A discloses a hydraulic control circuit for a garbage truck, which consists of three parts: an oil source, an oil circuit integration block, and an actuator. The oil source part includes an oil tank, an air cooler, a liquid level relay, a liquid level and temperature gauge, a temperature sensor, an air filter, a fixed-displacement pump, a motor, a return oil filter, and a check valve. The liquid level relay, the liquid level and temperature gauge, the temperature sensor, and the air filter are arranged on the oil tank. The suction port of the fixed-displacement pump is communicated with the oil tank. A check valve is communicated through a pipeline between the fixed-displacement pump and the oil inlet of the oil circuit integration block. A pipeline between the oil return port of the oil circuit integration block and the oil tank is communicated with the air cooler and the return oil filter. The oil circuit integration block part includes a high-pressure filter, an overflow valve, a pressure sensor, a first electromagnetic directional valve, a feeding working oil circuit, and a pressing working oil circuit. The outlet of the high-pressure filter is connected to the pressure sensor through a pipeline. The first electromagnetic directional valve is connected between the high-pressure filter and the feeding / pressing working oil circuit. The overflow valve is connected through a pipeline between the outlet of the high-pressure filter and the oil return pipeline of the oil circuit integration block. The pipeline interfaces on the oil circuit integration block include an oil inlet, an oil return port, a feeding working port, a pressing working port, and a pressure measuring port. The actuator part includes a set of feeding oil cylinders and a set of pressing oil cylinders. The oil cylinders inside each group of cylinders are connected in parallel. The feeding oil cylinder group and the pressing oil cylinder group are respectively communicated with the feeding working port and the pressing working port of the oil circuit integration block through pipelines. The above-mentioned hydraulic control circuit realizes six working conditions of the garbage truck with 1 fixed-displacement pump: the lifting and lowering of the hopper, the rapid feeding, the slow feeding, the retraction of the pressing cylinder, and the unloading of the system. Each working condition cannot be carried out simultaneously, that is, the feeding of the pressing cylinder cannot be carried out while the hopper is lifting and lowering.

[0004] CN102152934A discloses a hydraulic system for a garbage truck, which includes an oil tank, four groups of multi-way directional control valves, a gear valve, and an oil cylinder system. The oil tank communicates with the gear valve through a main oil pipe. The gear valve is respectively connected in parallel with each group of multi-way directional control valves through oil pipes. The oil cylinder system includes a push shovel oil cylinder, a lifting oil cylinder, a barrel tipping oil cylinder, and a door opening oil cylinder. The push shovel oil cylinder is connected to the first multi-way directional control valve through an oil pipe. The lifting oil cylinder is connected to the second multi-way directional control valve. The barrel tipping oil cylinder is connected to the third multi-way directional control valve. The door opening oil cylinder is connected to the fourth multi-way directional control valve. The above hydraulic control circuit connects the oil tank to 4 parallel subsystems respectively through a gear pump. When the 4 subsystems operate simultaneously, the power output by the gear pump is dispersed.

[0005] In summary, in order to reasonably distribute power during the operation of multiple subsystems, it is necessary to develop an improved mobile garbage compaction device. Summary of the Invention

[0006] The purpose of the present invention is to overcome the problems existing in the prior art and provide a mobile garbage compaction device that can reasonably distribute power during the operation of multiple subsystems.

[0007] To solve the above technical problems, the present invention provides a mobile garbage compaction device, which includes: a compaction device cylinder; a chassis fixedly connected to the front end of the compaction device cylinder. The chassis is provided with a feeding port communicating with the inner cavity of the compaction device cylinder at the lower end of its rear wall. The chassis is provided with a feeding hopper with an upward opening at its upper end. The chassis is provided with a feeding hopper for feeding materials into the feeding hopper and a lifting oil cylinder for actuating the feeding hopper at its front end; a compaction device arranged in the inner cavity of the chassis for pushing and compacting garbage into the compaction device cylinder. The compaction device includes a push head located below the feeding hopper and facing the feeding port and a push head oil cylinder for actuating the push head; a power unit slidably installed in the compaction device cylinder and extending along the width direction of the compaction device cylinder; wherein, the push head oil cylinder and the lifting oil cylinder are controlled by a hydraulic control system arranged in the power unit. The hydraulic control system includes a first oil pump and a second oil pump, as well as a combined position and a split position; in the combined position, the hydraulic control system controls the first oil pump and the second oil pump to supply oil to the push head oil cylinder together; and in the split position, the hydraulic control system controls the first oil pump to supply oil to the push head oil cylinder and controls the second oil pump to supply oil to the lifting oil cylinder.

[0008] According to an optional embodiment, an air-cooled heat dissipation device is arranged in the power unit.

[0009] According to an alternative embodiment, the mobile waste compressing device includes a maintenance door which is arranged at a position corresponding to the power unit on the side surface of the compressing device cylinder body; and ventilation holes are arranged on the maintenance door, and the power unit can be taken out of the compressing device cylinder body via the maintenance door.

[0010] According to an alternative embodiment, the hydraulic control system includes an oil tank. The inlet of the first oil pump is connected to the oil tank through a first filter, and the inlet of the second oil pump is connected to the oil tank through a second filter.

[0011] According to an alternative embodiment, the outlet of the first oil pump is connected to the P oil port of a push head solenoid directional control valve for controlling the movement of the push head oil cylinder. The two output ports of the push head solenoid directional control valve are respectively connected to the oil inlets at both ends of the push head oil cylinder; the outlet of the second oil pump is connected to the P oil port of a position switching solenoid directional control valve for switching between the linkage position and the split position. The two output ports of the position switching solenoid directional control valve are respectively connected to the P oil port of the push head solenoid directional control valve and the P oil port of a lifting material solenoid directional control valve for controlling the movement of the lifting material oil cylinder. The two output ports of the lifting material solenoid directional control valve are respectively connected to the oil inlets at both ends of the lifting material oil cylinder; and the T oil port of the push head solenoid directional control valve, the T oil port of the position switching solenoid directional control valve and the T oil port of the lifting material solenoid directional control valve are all connected to the inlet of the oil circuit radiator. The outlet of the oil circuit radiator is connected to the inlet of a return filter, and the outlet of the return filter is connected to the oil tank.

[0012] According to an alternative embodiment, the inlet of a first overflow valve is connected between the P oil port of the push head solenoid directional control valve and the outlet of the first oil pump, and the outlet of the first overflow valve is connected to the oil tank; and the inlet of a second overflow valve is connected between the P oil port of the position switching solenoid directional control valve and the outlet of the second oil pump, and the outlet of the second overflow valve is connected to the oil tank.

[0013] According to an alternative embodiment, the left and right working positions of the push head solenoid directional control valve are respectively controlled by a retraction electromagnetic coil and a forward movement electromagnetic coil; the left and right working positions of the lifting material solenoid directional control valve are respectively controlled by a lower lifting material electromagnetic coil and an upper lifting material electromagnetic coil; and both the push head solenoid directional control valve and the lifting material solenoid directional control valve are three-position four-way solenoid directional control valves and their neutral position functions are both of Y type, and the position switching solenoid directional control valve is a two-position four-way solenoid directional control valve.

[0014] According to an alternative embodiment, the rear port of the compressing device cylinder body is provided with an openable and closable door cover; the mobile waste compressing device includes a locking device; and the locking device includes a door cover positioning pin fixed on the side surface of the door cover and a door cover positioning lock ear fixed at a position corresponding to the door cover positioning pin on the rear door frame of the compressing device cylinder body.

[0015] According to an alternative embodiment, the door cover positioning locking lug includes a protruding portion extending upward; and the door cover positioning locking lug carries the door cover positioning pin at the closed position of the door cover and abuts against the door cover positioning pin in the horizontal direction by means of the protruding portion to restrict the movement of the door cover in the horizontal direction.

[0016] According to an alternative embodiment, the contour of the protruding portion is designed such that the restriction on the movement of the door cover in the horizontal direction is gradually released when the door cover moves upward in the vertical direction.

[0017] Compared with the prior art, the present invention has the following beneficial effects: According to actual needs, when it is not necessary to feed the feed hopper, the hydraulic control system is in the linkage position. In the linkage position, the hydraulic control system controls the first oil pump and the second oil pump to supply oil to the pusher cylinder together to improve the efficiency of the pusher compressing the garbage. When it is necessary to feed the feed hopper, the hydraulic control system is in the split position. In the split position, the hydraulic control system controls the first oil pump to supply oil to the pusher cylinder and controls the second oil pump to supply oil to the lifting cylinder. In this way, not only the continuous operation of the pusher is ensured, but also there is a dedicated second oil pump to supply oil to the lifting cylinder, so that the operation of the lifting cylinder will not have any impact on the pusher cylinder. In addition, the power unit is arranged as far away from the feed hopper as possible to prevent the flying objects in the garbage from entering the power unit through the ventilation holes, thus causing a failure in the hydraulic control system therein. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments. The drawings are only for reference and illustration, and are not intended to limit the present invention.

[0019] Figure 1 is the front view of the mobile garbage compression equipment of the present invention before lifting.

[0020] Figure 2 is Figure 1 the top view of

[0021] Figure 3 is Figure 2 the sectional view along A-A in

[0022] Figure 4 is Figure 3 the enlarged view of part C in

[0023] Figure 5 is Figure 1 the perspective view of

[0024] Figure 6 is the front view of the mobile garbage compression equipment of the present invention after lifting and compressing.

[0025] Figure 7 isFigure 6 Top view.

[0026] Figure 8 is Figure 7 Cross-sectional view along B-B in

[0027] Figure 9 is Figure 6 Stereogram of

[0028] Figure 10 State diagram of the present invention's mobile garbage compression equipment during unloading.

[0029] Figure 11 Hydraulic control schematic diagram of the present invention's mobile garbage compression equipment.

[0030] In the figure: 1. Compression equipment cylinder; 1a. Door cover hinge seat; 1b. Door cover pivot pin; 1c. Door cover positioning lock ear; 1d. Exhaust angle steel; 1e. Exhaust elbow; 1f. Crushing beam; 1g. Crushing knife;

[0031] 2. Door cover; 2a. Door cover hinge arm; 2b. Door cover positioning pin; 2c. Push rod; 2d. Door locking oil cylinder;

[0032] 3. Chassis; 3a. Hoisting arm hinge seat; 3b. U-shaped hook; 3c. Pressing material opening; 3d. Feeding hopper; 3e. Hook seat; 3f. Power unit track; 3g. Power unit; 3h. Maintenance door;

[0033] 4. Loading hopper; 4a. Loading hopper hanging arm; 4b. Hanging arm bracket;

[0034] 5. Hoisting arm; 6. Hoisting oil cylinder; 7. Pull rod; 8. Pusher head oil cylinder; 9. Pusher head; 9a. Pusher head top plate; 9b. Lower layer retaining bar; 10. Lower layer sliding plate; 11a. Upper layer retaining bar; 12. Upper layer sliding plate;

[0035] 14. Compression equipment base; 15. Compression equipment locking arm; 16. Unloading oil cylinder; 17. Carriage base; 18. Sealing strip; 19. Limit groove;

[0036] T. Oil sump; R. Oil circuit radiator; Y1. Overpressure protection solenoid valve; Y2. Pusher head electromagnetic directional valve; Y3. Position switching solenoid valve; Y4. Hoisting electromagnetic directional valve; S1. Overpressure protection electromagnetic coil; S21. Retraction electromagnetic coil; S22. Forward movement electromagnetic coil; S3. Position switching electromagnetic coil; S41. Hoisting lower electromagnetic coil; S42. Hoisting upper electromagnetic coil; F1. First relief valve; F2. Second relief valve; G1. First filter; G2. Second filter; G3. Return filter; B1. First oil pump; B2. Second oil pump. Detailed implementation mode

[0037] As Figures 1 to 10As shown in the figure, the mobile garbage compression equipment of the present invention includes a compression equipment cylinder body 1. The front end of the compression equipment cylinder body 1 is fixedly connected with a machine box 3. At the lower end of the rear wall of the machine box 3, there is a feeding port 3c communicating with the inner cavity of the compression equipment cylinder body 1. Inside the machine box 3, there is a compression device for pushing and compressing garbage into the compression equipment cylinder body. The bottoms of the compression equipment cylinder body 1 and the machine box are jointly fixed on the compression equipment base 14. At the front of the compression equipment base 14, there is a compression equipment locking arm 15 extending vertically upward. The two ends of the U-shaped hook 3b are hinged on the hook seat 3e. The root of the hook seat 3e is welded on the outer wall of the front end plate of the machine box 3. The power unit 3g is slidably installed in the compression equipment cylinder body 1 and extends along the width direction of the compression equipment cylinder body 1. An air-cooled heat dissipation device (not shown) is arranged in the power unit 3g. The compression equipment cylinder body 1 includes a maintenance door 3h, which is arranged at a position corresponding to the power unit 3g on the side of the compression equipment cylinder body 1. Ventilation holes are arranged on the maintenance door 3h. The power unit 3g can be taken out of the compression equipment cylinder body 1 through the maintenance door 3h for maintenance.

[0038] At the upper end of the machine box 3, there is a feeding hopper 3d with an upward opening. At the rear port of the compression equipment cylinder body 1, there is an openable door cover 2. The compression equipment base 14 is supported on the carriage base 17, and the rear end of the compression equipment base 14 is hinged to the rear end of the carriage base 17. In the middle of the carriage base 17, there is a hinged unloading oil cylinder 16. The end of the piston rod of the unloading oil cylinder 16 is hinged to the middle of the compression equipment base 14. The axis of the compression equipment cylinder body 1 is parallel to the bottom plane of the carriage base 17.

[0039] As Figure 3 、 Figure 4 shown in the figure, at the top of the inner cavity of the compression equipment cylinder body 1, there is an exhaust angle steel 1d welded. The V-shaped opening of the exhaust angle steel 1d faces upward and extends along the entire length direction of the compression equipment cylinder body 1. At the rear end of the exhaust angle steel 1d, there is an exhaust port opening downward. The front end of the exhaust angle steel 1d is welded on the front end face of the compression equipment cylinder body 1. The two long sides on both sides of the exhaust angle steel 1d are completely welded and closed with the compression equipment cylinder body 1. On the front end face of the compression equipment cylinder body 1, there is an exhaust elbow 1e welded. One end of the exhaust elbow 1e communicates with the exhaust channel of the exhaust angle steel 1d, and the other end of the exhaust elbow 1e communicates with the atmosphere.

[0040] As Figure 2 、 Figure 3 、 Figure 4As shown, the compression device includes a push head 9 facing the material pressing opening 3c. The push head 9 is located below the feed hopper 3d. Concave pits are symmetrically provided on the working surface of the push head 9 facing the rear end. A push head oil cylinder 8 is hinged to the front end face of the push head 9. The two push head oil cylinders 8 are cross - arranged and the other ends of the push head oil cylinders 8 are respectively hinged to the inner wall of the front end plate of the machine box 3. On the end plate where the compression equipment cylinder body 1 is docked with the machine box 3, a crushing beam 1f extending along the width direction of the machine box is installed. Multiple crushing knives 1g are installed at intervals below the crushing beam 1f. Each crushing knife 1g is located above the material pressing opening 3c and the cutting edge inclines backward and downward.

[0041] As Figure 3 , Figure 4 shown, a push head top plate 9a is fixed to the top of the push head 9. Above the front end of the push head top plate 9a, a lower layer retaining bar 9b extending along the width direction of the machine box is fixed. A lower layer sliding plate 10 extending along the length direction of the machine box covers the lower layer retaining bar 9b. The front and rear ends of the lower layer sliding plate 10 are bent downward. Above the front end of the lower layer sliding plate 10, an upper layer retaining bar 11a extending along the width direction of the machine box is fixed. An upper layer sliding plate 12 extending along the length direction of the machine box covers the upper layer retaining bar 11a. The front and rear ends of the upper layer sliding plate 12 are bent downward. The push head top plate 9a, the lower layer sliding plate 10 and the upper layer sliding plate 12 are all as wide as the inner cavity width of the machine box 3. The two sides in the width direction of the lower layer sliding plate 10 and the upper layer sliding plate 12 are respectively located in the corresponding lower layer guide grooves and upper layer guide grooves. The lower layer guide grooves and the upper layer guide grooves are respectively fixed to the two side walls in the width direction of the machine box 3.

[0042] As Figure 2 shown, a limit pin for limiting the rear edge of the upper layer sliding plate 12 is inserted into the upper layer guide groove. The position of the limit pin is adapted to the extreme extended position of the upper layer sliding plate 12. When the upper layer sliding plate 12 is in the extreme extended position, the front edge of the upper layer sliding plate 12 is closer to the front end plate of the machine box 3 than the front edge of the feed hopper 3d. Nylon edges are respectively provided on the two sides in the width direction of the lower layer sliding plate 10 and the upper layer sliding plate 12. Each nylon edge is respectively located in the lower layer guide groove and the upper layer guide groove.

[0043] As Figure 1 , Figure 4 , Figure 5As shown in the figure, a feeding hopper 4 capable of feeding materials into the feeding hopper 3d is provided at the front end of the chassis 3. The opening of the feeding hopper 4 faces upward. The rear end of the feeding hopper 4 is fixedly connected with a feeding hopper hanging arm 4a extending vertically upward. The upper end of the feeding hopper hanging arm 4a is hinged to the upper end of the front part of the chassis 3. Lifting arm hinge seats 3a extending in the height direction are respectively fixed on the two side walls of the chassis in the width direction. The upper ends of the lifting arm hinge seats 3a are respectively hinged with lifting arms 5 extending towards the feeding hopper. The other ends of the lifting arms 5 are respectively hinged with pull rods 7. The lower ends of the pull rods 7 are respectively hinged on the hanging arm brackets 4b. The hanging arm brackets 4b are respectively vertically connected to the lower ends of the feeding hopper hanging arms 4a. The lower ends of the lifting arm hinge seats 3a are respectively hinged with lifting cylinders 6. The other ends of the lifting cylinders 6 are respectively hinged to the middle parts of the lifting arms 5.

[0044] As Figure 6 As shown in the figure, a door cover 2 capable of being opened and closed is provided at the rear port of the compression equipment cylinder body 1. The upper part of the rear door frame of the compression box cylinder body 1 is fixed with a door cover hinge seat 1a. A door cover rotation pin 1b is fixed on the door cover hinge seat 1a. The upper part of the door cover 2 is fixedly connected with a door cover hinge arm 2a. A door cover positioning pin 2b extending in the width direction of the door cover is provided in the middle of the door cover in the height direction. A door cover positioning lock ear 1c extending rearward is fixedly connected to the rear door frame of the compression box cylinder body 1. The compression equipment cylinder body 1 includes a sealing strip 18 arranged at the outer edge of the rear port. The sealing strip 18 is in close contact with the door cover 2 at the closed position of the door cover 2. The locking device further includes a pair of push rods 2c slidably installed vertically along at least one limiting groove 19 on both sides of the compression equipment cylinder body 1, and a door cover rotation pin 1b rotatably connected to the upper ends of the push rods 2c. The locking device further includes a door locking cylinder 2d installed on the compression equipment cylinder body 1 and hinged to the lower ends of the push rods 2c. The door cover positioning lock ear 1c includes a protruding part extending upward. The door cover positioning lock ear 1c bears the door cover positioning pin 2b at the closed position of the door cover 2 and abuts against the door cover positioning pin 2b horizontally by means of the protruding part to limit the horizontal movement of the door cover 2. The contour of the protruding part is designed such that the limitation on the horizontal movement of the door cover 2 is gradually released when the door cover 2 moves upward in the vertical direction.

[0045] Due to this design, the door cover positioning lock ear 1c plays a role of bearing and limiting. Therefore, even if no force is actively applied (such as applied by a power mechanism) to the door cover 2, the door cover 2 will remain in close contact with the rear port of the compression equipment cylinder body 1. In this way, the sealing of the compression equipment cylinder body 1 can be ensured. The door cover 2 is buffered when opening and closing, avoiding the impact on the sealing strip 18 at the outer edge of the rear port of the compression equipment cylinder body 1, and prolonging the service life of the sealing strip 18 and the compression equipment cylinder body 1 as a whole.

[0046] As Figures 1 to 5As shown, when the feeding hopper 4 lies horizontally, its opening faces upward. Garbage is loaded into the feeding hopper 4, and then the piston rod of the lifting oil cylinder 6 extends to push the lifting arm 5 to rotate around the lifting arm hinge seat 3a. The front end of the lifting arm 5 drives the pull rod 7 to move upward. The pull rod 7 pulls the lower end of the hopper hanging arm 4a of the feeding hopper to rotate around the upper hinge point. The feeding hopper 4 gradually rotates toward the feeding hopper 3d of the machine case 3 while being lifted upward until the garbage is poured into the feeding hopper 3d, as Figures 6 to 9 shown. During this lifting and rotating process, the garbage in the feeding hopper 4 can be prevented from spilling out before reaching above the feeding hopper.

[0047] The piston rod of the push head oil cylinder 8 extends. The push head 9 pushes the garbage to enter the compression equipment cylinder body 1 from the pressing port 3c. After the garbage is sent into the pressing port 3c by the push head 9, the crushing knife 1g above the pressing port 3c cuts the garbage with larger size into several sections to facilitate compression. At the same time, the cutting edge of the crushing knife 1g faces backward, which can play a role of barbed reverse stop.

[0048] When the push head 9 extends backward to a certain stroke, the lower layer stop bar 9b on the push head top plate 9a hooks the rear end flange of the lower layer slide plate 10 to pull out the lower layer slide plate 10. After the lower layer slide plate 10 is completely pulled out, the upper layer stop bar 11a on the lower layer slide plate 10 hooks the rear end flange of the upper layer slide plate 12 to pull out the upper layer slide plate 12. After the push head 9 extends, the area above the push head 9 is always covered by the slide plate to prevent garbage from falling onto the back of the push head. The limit pin can prevent the upper layer slide plate 12 from sliding backward excessively and avoid exposing the front edge of the feeding hopper 3d.

[0049] When the push head 9 retracts, the lower layer stop bar 9b on the push head top plate 9a hooks the front end flange of the lower layer slide plate 10 to push the lower layer slide plate 10 back forward. After the lower layer slide plate 10 is completely retracted, the upper layer stop bar 11a on the lower layer slide plate 10 hooks the front end flange of the upper layer slide plate 12 to retract the upper layer slide plate 12, so that the working surface of the push head 9 is exposed below the feeding hopper 3d. The lower layer guide groove and the upper layer guide groove play a guiding role in the sliding of the lower layer slide plate 10 and the upper layer slide plate 12.

[0050] When the garbage is pushed backward by the push head 9 for compression, the gas at the rear of the compression equipment cylinder body 1 gradually enters the exhaust channel surrounded by the exhaust angle steel 1d from the exhaust port at the rear end of the exhaust angle steel 1d, and then is discharged from the exhaust elbow 1e at the front end, so as to avoid forming air lock and affecting the garbage filling amount.

[0051] As Figure 11 shown, the push head oil cylinder 8 and the lifting oil cylinder 6 are controlled by a hydraulic control system. The hydraulic control system includes an overpressure protection solenoid valve Y1, a push head electromagnetic directional control valve Y2, a position switching solenoid valve Y3 and a lifting electromagnetic directional control valve Y4. The overpressure protection solenoid valve Y1 and the position switching solenoid valve Y3 are both two-position four-way directional control valves. The push head electromagnetic directional control valve Y2 and the lifting electromagnetic directional control valve Y4 are both three-position four-way directional control valves and their neutral positions are of Y type.

[0052] The suction port of the first oil pump B1 is connected to the oil tank T through the first filter G1. The outlet of the first oil pump B1 is connected to the P oil port of the push head electromagnetic reversing valve Y2 and the P oil port of the overpressure protection electromagnetic valve Y1 for controlling the movement of the push head oil cylinder 8. The two output ports of the push head electromagnetic reversing valve Y2 are respectively connected to the oil inlets at both ends of the push head oil cylinder 8.

[0053] The suction port of the second oil pump B2 is connected to the oil tank T through the second filter G2. The outlet of the second oil pump B2 is connected to the P oil port of the position switching solenoid valve Y3 used to switch between the linkage position and the transfer position. The two output ports of the position switching solenoid valve Y3 are respectively connected to the P oil port of the push head solenoid reversing valve Y2 and the P oil port of the lifting solenoid reversing valve Y4 used to control the movement of the lifting cylinder 6. The two output ports of the lifting solenoid reversing valve Y4 are respectively connected to the oil inlets at both ends of the lifting cylinder 6.

[0054] The T oil port of the push head electromagnetic reversing valve Y2, the T oil port of the overpressure protection electromagnetic valve Y1, the T oil port of the position switching electromagnetic valve Y3 and the T oil port of the material lifting electromagnetic reversing valve Y4 are all connected to the inlet of the oil circuit radiator R. The outlet of the oil circuit radiator R is connected to the inlet of the reflux filter G3. The outlet of the reflux filter G3 is connected to the oil tank T.

[0055] The left and right positions of the push head electromagnetic reversing valve Y2 are controlled by the backward electromagnetic coil S21 and the forward electromagnetic coil S22 respectively. The left and right positions of the lifting electromagnetic reversing valve Y4 are controlled by the lower lifting electromagnetic coil S41 and the upper lifting electromagnetic coil S42 respectively. The inlet of the first overflow valve F1 is connected between the P oil port of the push head electromagnetic reversing valve Y2 and the outlet of the first oil pump B1. The outlet of the first overflow valve F1 is connected to the oil tank T. The inlet of the second overflow valve F2 is connected between the P oil port of the position switching electromagnetic valve Y3 and the outlet of the second oil pump B2. The outlet of the second overflow valve F2 is connected to the oil tank T. The conduction pressure of the first overflow valve F1 is greater than the conduction pressure of the second overflow valve F2.

[0056] When the three-position four-way reversing valve with a Y-type neutral function is in the neutral position, the P oil port, the A oil port and the B oil port are connected, and the T oil port is closed; when it is in the left position, the P oil port and the B oil port are connected, and the A oil port and the T oil port are connected; when it is in the right position, the P oil port and the A oil port are connected, and the B oil port and the T oil port are connected.

[0057] When the overpressure protection solenoid valve Y1 is in the left position, the P oil port and the B oil port are connected, and the A oil port and the T oil port are connected; when it is in the right position, the P oil port, the B oil port, the A oil port and the T oil port are all closed.

[0058] When the position switching solenoid valve Y3 is in the left position, the P oil port and the B oil port are connected, and the A oil port and the T oil port are connected; when it is in the right position, the P oil port and the A oil port are connected, and the B oil port and the T oil port are connected.

[0059] When the overpressure protection solenoid coil S1 is energized, the overpressure protection solenoid valve Y1 is in the left position, and the hydraulic oil that should provide power to the push head cylinder 8 returns to the oil tank T through the B oil port of the overpressure protection solenoid valve Y1, the oil circuit radiator R and the reflux filter G3, and does not provide power to the push head cylinder 8.

[0060] When the backward electromagnetic coil S21 is energized, the push head electromagnetic reversing valve Y2 is in the left position, and the push head oil cylinder 8 moves in the reverse direction to make the push head move backward. When both the backward electromagnetic coil S21 and the forward electromagnetic coil S22 are not energized, the push head electromagnetic reversing valve Y2 is in the middle position, and the push head oil cylinder 8 makes the push head move forward quickly for compression. When the forward electromagnetic coil S22 is energized, the push head electromagnetic reversing valve Y2 is in the right position, and the push head oil cylinder 8 moves forward to make the push head move forward for compression.

[0061] When the lower electromagnetic coil S41 is energized, the electromagnetic reversing valve Y4 is in the left position, and the lifting cylinder 6 moves in the reverse direction to lower the upper hopper 4. When the upper electromagnetic coil S42 is energized, the electromagnetic reversing valve Y4 is in the right position, and the lifting cylinder 6 moves forward to raise the upper hopper 4 for feeding.

[0062] When either the lower material lifting solenoid coil S41 or the upper material lifting solenoid coil S42 is energized, the position switching solenoid coil S3 is energized, and the position switching solenoid valve Y3 is in the left position, so that the hydraulic oil from the second oil pump B2 is supplied to the material lifting solenoid reversing valve Y4 via the P oil port and the B oil port of the position switching solenoid valve Y3, thereby providing power to the material lifting cylinder 6. When both the lower material lifting solenoid coil S41 and the upper material lifting solenoid coil S42 are not energized, the position switching solenoid coil S3 is not energized, and the position switching solenoid valve Y3 is in the right position, so that the hydraulic oil from the second oil pump B2 is supplied to the push head solenoid reversing valve Y2 via the P oil port and the A oil port of the position switching solenoid valve Y3, thereby providing power to the push head cylinder 8.

[0063] The above description is only a preferred embodiment of the present invention, and does not limit the scope of patent protection of the present invention. In addition to the above embodiments, the present invention may also have other implementations. Any technical solution formed by equivalent replacement or equivalent transformation falls within the protection scope required by the present invention. The technical features not described in the present invention can be realized by or using existing technologies, and will not be repeated here.

Claims

1. A mobile garbage compression device, wherein, The mobile garbage compression equipment includes: a compression equipment cylinder body; a chassis fixedly connected to the front end of the compression equipment cylinder body. The chassis is provided with a feeding port communicating with the inner cavity of the compression equipment cylinder body at the lower end of its rear wall, an upward-opening feeding hopper at its upper end, a feeding hopper for feeding materials into the feeding hopper and a lifting oil cylinder for actuating the feeding hopper at its front end; a compression device arranged in the inner cavity of the chassis for pushing and compressing garbage into the compression equipment cylinder body. The compression device includes a push head located below the feeding hopper and facing the feeding port and a push head oil cylinder for actuating the push head; a power unit slidably installed in the compression equipment cylinder body and extending along the width direction of the compression equipment cylinder body. It is characterized in that the push head oil cylinder and the lifting oil cylinder are controlled by a hydraulic control system arranged in the power unit. The hydraulic control system includes an oil tank, a first oil pump, a second oil pump, a position switching solenoid valve, a push head electromagnetic reversing valve, a lifting electromagnetic reversing valve, a first overflow valve, a second overflow valve, an oil circuit radiator and a return filter; in the linkage position, the first oil pump and the second oil pump jointly supply oil to the push head oil cylinder; and in the split position, the first oil pump supplies oil to the push head oil cylinder and controls the second oil pump to supply oil to the lifting oil cylinder; a maintenance door for taking out the power unit is arranged on the side surface of the compression equipment cylinder body corresponding to the power unit, and ventilation holes are provided on the maintenance door; the inlet of the first overflow valve is connected between the P oil port of the push head electromagnetic reversing valve and the outlet of the first oil pump, the inlet of the second overflow valve is connected between the P oil port of the position switching solenoid valve and the outlet of the second oil pump, and the outlets of the first overflow valve and the second overflow valve are connected to the oil tank; the T oil port of the push head electromagnetic reversing valve, the T oil port of the position switching solenoid valve and the T oil port of the lifting electromagnetic reversing valve are all connected to the oil circuit radiator, and the oil circuit radiator is connected to the oil tank through the return filter.

2. The mobile garbage compression equipment according to claim 1, wherein An air-cooled heat dissipation device is arranged in the power unit.

3. The mobile garbage compression equipment according to claim 1 or 2, wherein, The hydraulic control system further includes a first filter and a second filter. The inlet of the first oil pump is connected to the oil tank through the first filter, and the inlet of the second oil pump is connected to the oil tank through the second filter.

4. The mobile garbage compression device according to claim 3, wherein, The outlet of the first oil pump is connected to the P oil port of the push head electromagnetic reversing valve for controlling the movement of the push head oil cylinder, and the two output ports of the push head electromagnetic reversing valve are respectively connected to the oil inlets at both ends of the push head oil cylinder; and the outlet of the second oil pump is connected to the P oil port of the position switching solenoid valve for switching between the linkage position and the split position, and the two output ports of the position switching solenoid valve are respectively connected to the P oil port of the push head electromagnetic reversing valve and the P oil port of the lifting electromagnetic reversing valve for controlling the movement of the lifting oil cylinder, and the two output ports of the lifting electromagnetic reversing valve are respectively connected to the oil inlets at both ends of the lifting oil cylinder.

5. The mobile garbage compression device according to claim 1, wherein, The left and right working positions of the push head electromagnetic directional valve are respectively controlled by the retraction electromagnetic coil and the forward electromagnetic coil; the left and right working positions of the material lifting electromagnetic directional valve are respectively controlled by the lower material lifting electromagnetic coil and the upper material lifting electromagnetic coil; and both the push head electromagnetic directional valve and the material lifting electromagnetic directional valve are three-position four-way directional valves with a Y-type neutral function, and the position switching solenoid valve is a two-position four-way directional valve.

6. The mobile garbage compression device according to claim 1 or 2, wherein, The rear port of the compression equipment cylinder body is provided with an opening and closing door cover; the mobile garbage compression equipment includes a locking device; and the locking device includes a door cover positioning pin fixed on the side of the door cover and a door cover positioning lock ear fixed at a corresponding position on the rear door frame of the compression equipment cylinder body and corresponding to the door cover positioning pin.

7. The mobile garbage compression device according to claim 6, wherein, The door cover positioning lock ear includes a protruding portion extending upward; and the door cover positioning lock ear carries the door cover positioning pin at the closed position of the door cover and abuts against the door cover positioning pin in the horizontal direction by means of the protruding portion to limit the horizontal movement of the door cover.

8. The mobile garbage compression device according to claim 7, wherein, The contour of the protruding portion is designed such that the restriction on the horizontal movement of the door cover is gradually released when the door cover moves upward in the vertical direction.

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