CN113753445A - Push pedal backpressure control system and compression garbage truck - Google Patents
Push pedal backpressure control system and compression garbage truck Download PDFInfo
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- CN113753445A CN113753445A CN202111202730.6A CN202111202730A CN113753445A CN 113753445 A CN113753445 A CN 113753445A CN 202111202730 A CN202111202730 A CN 202111202730A CN 113753445 A CN113753445 A CN 113753445A
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- 230000006835 compression Effects 0.000 title claims abstract description 15
- 238000007906 compression Methods 0.000 title claims abstract description 15
- 230000006698 induction Effects 0.000 claims description 14
- 230000009466 transformation Effects 0.000 abstract 1
- 239000000178 monomer Substances 0.000 description 18
- 238000010586 diagram Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 230000009194 climbing Effects 0.000 description 6
- 238000007790 scraping Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000001939 inductive effect Effects 0.000 description 5
- 238000005056 compaction Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 230000002457 bidirectional effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65F—GATHERING OR REMOVAL OF DOMESTIC OR LIKE REFUSE
- B65F3/00—Vehicles particularly adapted for collecting refuse
- B65F3/14—Vehicles particularly adapted for collecting refuse with devices for charging, distributing or compressing refuse in the interior of the tank of a refuse vehicle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65F—GATHERING OR REMOVAL OF DOMESTIC OR LIKE REFUSE
- B65F3/00—Vehicles particularly adapted for collecting refuse
- B65F3/14—Vehicles particularly adapted for collecting refuse with devices for charging, distributing or compressing refuse in the interior of the tank of a refuse vehicle
- B65F3/20—Vehicles particularly adapted for collecting refuse with devices for charging, distributing or compressing refuse in the interior of the tank of a refuse vehicle with charging pistons, plates, or the like
- B65F3/201—Vehicles particularly adapted for collecting refuse with devices for charging, distributing or compressing refuse in the interior of the tank of a refuse vehicle with charging pistons, plates, or the like the charging pistons, plates or the like moving rectilinearly
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65F—GATHERING OR REMOVAL OF DOMESTIC OR LIKE REFUSE
- B65F3/00—Vehicles particularly adapted for collecting refuse
- B65F3/24—Vehicles particularly adapted for collecting refuse with devices for unloading the tank of a refuse vehicle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65F—GATHERING OR REMOVAL OF DOMESTIC OR LIKE REFUSE
- B65F3/00—Vehicles particularly adapted for collecting refuse
- B65F3/14—Vehicles particularly adapted for collecting refuse with devices for charging, distributing or compressing refuse in the interior of the tank of a refuse vehicle
- B65F2003/146—Sensors, e.g. pressure sensors
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Abstract
The invention discloses a push plate backpressure control system and a compression garbage truck, wherein the push plate backpressure control system comprises a control loop, a push plate oil cylinder and a sliding plate oil cylinder; the piston in the push plate oil cylinder divides the interior of the push plate oil cylinder into a first push plate oil cavity and a second push plate oil cavity, and the piston in the slide plate oil cylinder divides the interior of the slide plate oil cylinder into a first slide plate oil cavity and a second slide plate oil cavity; the control circuit comprises an oil inlet pipeline, an oil return pipeline, a first branch and a second branch, wherein the first branch is provided with a first overflow valve, the second branch is provided with a second overflow valve and an electromagnetic valve, and the first branch and the second branch are connected in parallel on the control circuit. According to the technical scheme, the control loop controls the connection or disconnection of the oil circuit where the second overflow valve is located through the electromagnetic valve, so that mutual switching between different backpressure overflow pressure values can be realized, and further multistage backpressure transformation control of the push plate is realized.
Description
Technical Field
The invention relates to the technical field of compression type garbage trucks, in particular to a push plate back pressure control system and a compression type garbage truck.
Background
Along with the rapid development of economy in China, the garbage yield in cities and rural areas is increasing, people have increasingly heightened awareness of environmental protection, and compression type garbage trucks are continuously endowed with higher expectations in the process of garbage transfer mechanization.
In order to improve the loading capacity of the compression type garbage truck, the push plate oil cylinder enables the push plate to generate back pressure which is mutually extruded with the scraping and climbing force of the sliding plate, and therefore bidirectional compression on garbage is achieved. A push plate oil cylinder for driving the push plate adopts a multi-stage oil cylinder, and in the garbage press-mounting process, the effective sectional area of a rodless cavity of the oil cylinder is changed when all stages of the push plate oil cylinder are compressed, so that the back pressure generated in the early stage of garbage press-mounting is smaller, and the back pressure generated in the later stage of garbage press-mounting is larger. The problem of 'loose front and tight back' caused by uneven garbage compaction density and incompact garbage compaction at the front end of the box body and over-compact garbage compaction at the back end is caused.
Because the back pressure that the rubbish pressure equipment later stage produced is great, and box wall and earlier stage have pressed into the rubbish in the box and produce frictional resistance, the pressure equipment device need provide bigger scraping climbing force than earlier stage when leading to later stage pressure equipment, produces the defect problem that later stage crawled motionless even.
Disclosure of Invention
Therefore, a push plate back pressure control system and a compression type garbage truck are needed to be provided, and the problems in the background art are solved.
In order to achieve the above object, the present embodiment provides a push plate backpressure control system, including a control circuit, a push plate cylinder and a slide plate cylinder;
the piston in the push plate oil cylinder divides the interior of the push plate oil cylinder into a first push plate oil cavity and a second push plate oil cavity, and the piston in the slide plate oil cylinder divides the interior of the slide plate oil cylinder into a first slide plate oil cavity and a second slide plate oil cavity;
the control circuit comprises an oil inlet pipeline, an oil return pipeline, a first branch and a second branch, wherein the first branch is provided with a first overflow valve, the second branch is provided with a second overflow valve and an electromagnetic valve, one end of the first branch and one end of the second branch are connected with the second push plate oil cavity through the oil inlet pipeline, the other end of the first branch and the other end of the second branch are connected with the first slide plate oil cavity through the oil return pipeline, and the first push plate oil cavity and the second slide plate oil cavity are respectively used for connecting an oil source.
Further, the control system also comprises a push plate and a sliding plate;
the push plate with the slide is just to setting up, the push plate sets up on the push plate hydro-cylinder, the push plate hydro-cylinder is used for driving the push plate and removes, the slide sets up on the slide hydro-cylinder, the slide hydro-cylinder is used for driving the slide and removes.
Further, the control system also comprises a box body and a charging hopper;
the box body is hinged with the charging hopper, and when the charging hopper rotates along the hinged part and is attached to the opening at one side of the box body, the charging hopper covers the opening at one side of the box body;
the push plate and the push plate oil cylinder are both arranged in the box body, the push plate oil cylinder is used for pushing the push plate to reciprocate along the length direction of the box body, and the length direction of the box body is parallel to the direction from the other side of the box body to one side of the box body, which is open;
the sliding plate and the sliding plate oil cylinder are arranged in the charging hopper, the sliding plate is inclined to the length direction of the box body, and the sliding plate oil cylinder is used for pushing the sliding plate to reciprocate along the length direction of the box body.
Further, the push plate is provided with a first wall and a second wall;
the first wall is connected with the second wall, the first wall and the second wall are obliquely arranged, and the push plate oil cylinder is connected with the second wall.
Furthermore, the control system also comprises a scraper and a scraper oil cylinder;
the scraper is hinged with the end part of the sliding plate, the scraper oil cylinder is arranged on the sliding plate, and the scraper oil cylinder is used for driving the scraper to rotate at the hinged part.
Furthermore, the number of the second branches is multiple, the overflow pressure value of a second overflow valve on each second branch is different, and the push plate back pressure control system further comprises multiple groups of sensing devices;
the number of the induction devices is the same as that of the second branches, each group of induction devices comprises an induction element and an inductor, the push plate cylinder further comprises a multi-stage sliding sleeved cylinder barrel, and the cylinder barrel is stretched through a piston rod of the push plate cylinder;
each induction element is arranged on a piston rod of the push plate oil cylinder, and each inductor is arranged on the outer wall of the cylinder barrel of the push plate oil cylinder.
Further, the device also comprises a control unit;
the control unit is connected with the sensing elements and each electromagnetic valve, when the sensing elements sense sensing objects, the sensing elements send sensing signals to the control unit, and the control unit controls the second branch circuit to be connected or disconnected through the electromagnetic valves.
Further, the overflow pressure value of the first overflow valve is larger than the overflow pressure value of the second overflow valve.
Further, a pump is also included;
the pump is positioned between the push plate oil cylinder and the oil source and between the sliding plate oil cylinder and the oil source.
To achieve the above object, the present embodiment further provides a compression-type garbage truck, including the push plate backpressure control system according to any one of the above embodiments.
Be different from prior art, above-mentioned technical scheme control circuit controls the intercommunication or the disconnection of the oil circuit at second overflow valve place through the solenoid valve, can realize switching over each other between the different backpressure overflow pressure values, and then realizes the multistage backpressure transform control of push pedal to this solves the single and not good problem of effect of backpressure power.
Drawings
FIG. 1 is a schematic structural diagram of a control circuit, a push plate cylinder, a slide plate cylinder and a scraper cylinder in the present embodiment;
FIG. 2 is a schematic structural diagram of a control circuit having 1 second branch in the present embodiment;
FIG. 3 is a schematic structural diagram of a control loop having 2 second branches according to the present embodiment;
FIG. 4 is a schematic structural diagram of the compression-type garbage truck according to the present embodiment;
FIG. 5 is a second schematic view of the compression-type garbage truck of this embodiment;
FIG. 6 is a schematic structural diagram of the push plate cylinder, the sensing element and the sensor according to the present embodiment;
FIG. 7 is a second schematic structural diagram of the push plate cylinder, the sensing element and the sensor in the present embodiment;
fig. 8 is a schematic structural diagram of an information obtaining module and an action executing module in this embodiment.
Description of reference numerals:
1. a control loop;
11. a first branch; 12. a second branch circuit; 13. an oil inlet pipeline; 14. an oil return line;
15. a first overflow valve; 16. a second overflow valve; 17. an electromagnetic valve;
2. a push plate oil cylinder;
21. pushing the plate; 211. a first wall; 212. a second wall;
22. a first push plate oil chamber; 23. a second push plate oil chamber; 24. a cylinder barrel; 25. a piston rod;
3. a slide plate cylinder;
31. a slide plate; 32. a first slide plate oil chamber; 33. a second slide plate oil chamber;
4. a scraper oil cylinder;
41. a squeegee;
5. an inductive element;
51. a sensor;
6. a source of oil;
7. a pump;
8. a diverter valve;
9. a compression type garbage truck;
91. a box body; 92. a charging hopper; 93. garbage;
100. an information acquisition module;
101. a first information acquisition unit monomer; 102. a second information acquisition unit monomer;
103. a third information acquisition unit monomer; 104. a fourth information acquisition unit monomer;
105. a fifth information acquisition unit monomer; 106. a sixth information acquisition unit monomer;
107. a seventh information acquisition unit monomer;
110. an action execution module;
111. a first execution unit element; 112. a second execution unit element;
113. a third execution unit element; 114. a fourth execution unit element;
115. a fifth execution unit element; 116. a sixth execution unit element;
117. a seventh execution unit element;
120. a relay;
130. a working lamp;
f1, back pressure;
f2, scraping and climbing force.
Detailed Description
To explain technical contents, structural features, and objects and effects of the technical solutions in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.
Referring to fig. 1-8, the present embodiment provides a push plate backpressure control system for a compression-type garbage truck 9 or other applicable equipment. The push plate back pressure control system comprises a control loop 1, a push plate oil cylinder 2 and a slide plate oil cylinder 3.
The piston in the push plate oil cylinder 2 divides the interior of the push plate oil cylinder 2 into a first push plate oil chamber 22 and a second push plate oil chamber 23, and a piston rod 25 in the push plate oil cylinder 2 penetrates through one of the first push plate oil chamber 22 and the second push plate oil chamber 23. The piston inside the slide plate oil cylinder 3 divides the inside of the slide plate oil cylinder 3 into a first slide plate oil chamber 32 and a second slide plate oil chamber 33, and the piston rod 25 inside the slide plate oil cylinder 3 penetrates through one of the first slide plate oil chamber 32 and the second slide plate oil chamber 33.
The control circuit 1 comprises an oil inlet pipeline 13, an oil return pipeline 14, a first branch 11 and a second branch 12. The first branch 11 is provided with a first overflow valve 15, and the second branch 12 is provided with a second overflow valve 16 and an electromagnetic valve 17. The control circuit 1 is a parallel circuit, one end of the first branch 11 and one end of the second branch 12 are connected with the second push plate oil chamber 23 through the oil inlet pipeline 13, and the other end of the first branch 11 and the other end of the second branch 12 are connected with the first slide plate oil chamber 32 through the oil return pipeline 14.
The oil source 6 is used for supplying oil to the push plate oil cylinder 2 and the slide plate oil cylinder 3, and the first push plate oil chamber 22 and the second slide plate oil chamber 33 are respectively used for connecting the oil source 6.
Among the above-mentioned technical scheme, control circuit controls the intercommunication or the disconnection of the oil circuit at second overflow valve place through the solenoid valve, can realize switching over each other between the different backpressure overflow pressure values, and then realizes the multistage backpressure transform control of push pedal to this solves the single and not good problem of effect of backpressure power.
Referring to figures 1, 4 and 5, in this embodiment, a push plate back pressure control system is used on a compression-type garbage truck 9 to compress garbage 93 in a box 91 from both ends, the control system further comprising a push plate 21 and a slide plate 31. The push plate 21 is opposite to the sliding plate 31, the push plate oil cylinder 2 is arranged on the other side of the storage box, and the sliding plate oil cylinder 3 is arranged on one side of the storage box. The push plate 21 is arranged on the push plate oil cylinder 2, and the push plate oil cylinder 2 is used for driving the push plate 21 to move. The sliding plate 31 is arranged on the sliding plate oil cylinder 3, and the sliding plate oil cylinder 3 is used for driving the sliding plate 31 to move.
The push plate oil cylinder 2 enables the push plate 21 to generate back pressure F1 which is mutually extruded with the scraping climbing force F2 of the sliding plate 31, so that the garbage is compressed bidirectionally, and the density of the compacted garbage 93 is improved. The piston rod 25 in the push plate oil cylinder 2 extends, the piston rod 25 drives the push plate 21 to move towards one side of the storage box, the piston rod in the slide plate oil cylinder 3 extends, the piston rod drives the slide plate 31 to move towards the other side of the storage box, and the garbage 93 between the push plate 21 and the slide plate 31 can be pressed by the push plate 21 and the slide plate 31.
Referring to fig. 1, 4 and 5, in a preferred embodiment, the piston of the push plate cylinder 2 divides a cylinder barrel 24 into a first push plate oil chamber 22 and a second push plate oil chamber 23, and the piston rod of the push plate cylinder 2 extends out of the cylinder barrel 24 of the push plate cylinder 2. The push plate 21 is arranged at one end of a cylinder barrel 24 of the push plate cylinder 2, a piston rod of the push plate cylinder 2 extends out of the other end of the cylinder barrel 24 of the push plate cylinder 2, and a piston rod 25 of the push plate cylinder 2 penetrates through the first push plate oil chamber 22. The piston rod of the push plate oil cylinder 2 can be arranged on the side wall of the other side of the storage box.
Referring to fig. 1, 4 and 5, in a preferred embodiment, the piston of the slide plate cylinder 3 is divided into a first slide plate oil chamber 32 and a second slide plate oil chamber 33, and the piston rod of the slide plate cylinder 3 extends out of the cylinder barrel of the slide plate cylinder 3. The slide plate 31 is disposed at one end of the cylinder barrel of the slide plate cylinder 3, and the piston rod of the slide plate cylinder 3 extends out from the other end of the cylinder barrel of the slide plate cylinder 3, and the piston rod of the slide plate cylinder 3 penetrates through the first slide plate oil chamber 32. The piston rod of the ram cylinder 3 may be disposed on the other side wall of the storage tank. Preferably, a piston rod of the slide plate cylinder 3 is connected with the slide plate, a cylinder barrel of the slide plate cylinder 3 is connected with the charging hopper, and a piston rod of the slide plate cylinder 3 extends out to drive the slide plate 31 to move upwards.
Referring to fig. 4 and 5, in the present embodiment, the storage box includes a box body 91 and a loading hopper 92, the box body 91 is hinged to the loading hopper 92, and when the loading hopper 92 rotates along the hinged portion and is attached to an opening on one side of the box body 91, the loading hopper 92 covers the opening on one side of the box body 91, and the structure is as shown in fig. 4; when the hopper 92 is pivoted along the hinge portion, the hopper 92 can open one side of the box 91, and the garbage 93 can be loaded into the box 91 or the garbage 93 can be discharged, as shown in fig. 5.
The push plate 21 with the push plate cylinder 2 all sets up in the box 91, the push plate cylinder 2 is used for promoting the length direction reciprocating motion of push plate 21 along box 91, the length direction of box 91 is on a parallel with the open direction in one side of box 91 to the opposite side of box 91. The piston rod of the push plate oil cylinder 2 can be arranged on the side wall of the box body 91, and the size of the push plate 21 is matched with that of the box body 91, so that the side wall of the push plate 21 can slide along the box body 91. The slide plate 31 and the slide plate cylinder 3 are both arranged in the charging hopper 92, the slide plate 31 is arranged obliquely to the length direction of the box body 91, and the slide plate cylinder 3 is used for pushing the slide plate to reciprocate along the length direction of the box body 91.
Referring to fig. 4 and 5, in the present embodiment, the push plate 21 is provided with a first wall 211 and a second wall 212. The first wall 211 is connected to the second wall 212, the first wall 211 and the second wall 212 are disposed in an inclined manner, the first wall 211 is perpendicular to the bottom of the box 91, and the second wall 212 is inclined to the bottom of the box 91. The push plate oil cylinder 2 is connected with the second wall 212, and the bottom of the second wall 212 is connected with the bottom in the box body 91 in a sliding manner. It should be noted that, in order to improve the smoothness of the sliding between the push plate 21 and the box 91, a pulley may be disposed at the bottom of the first wall 211, and the pulley is slidably connected to the bottom inside the box 91.
Referring to fig. 4, in the preferred embodiment, when the hopper 92 is pivoted along the hinge portion and attached to the one-side opening of the box body 91, the moving track of the push plate 21 is inclined to the longitudinal direction of the box body 91. Thus, the charging hopper 92 can press the garbage 93 from the bottom to the top, and the garbage 93 can be effectively prevented from dropping.
In other embodiments, when the hopper 92 is rotated along the hinge portion and attached to the one-side opening of the box body 91, the push plate 21 moves in a path parallel to the longitudinal direction of the box body 91. Thus, the hopper 92 can press the garbage 93 from one side of the storage box to the other side of the storage box.
Referring to fig. 4 and 5, in the present embodiment, the control system further includes a scraper 41. The scraper 41 is connected with the end of the sliding plate 31, the scraper 41 is inclined to the sliding plate 31, and the scraper 41 and the sliding plate 31 form a hook part which can catch falling garbage 93.
Referring to fig. 1, 4 and 5, in the present embodiment, the control system further includes a squeegee cylinder 4. The scraper 41 is hinged with the end part of the sliding plate 31, the scraper cylinder 4 is arranged on the sliding plate 31, and the scraper cylinder 4 is used for driving the scraper 41 to rotate at the hinged part. It should be noted that the squeegee cylinder 4 is not connected to the control circuit 1, and the squeegee cylinder 4 is directly connected to the active source.
In this embodiment, in order to automate the push plate backpressure control system, the push plate backpressure control system further comprises a control unit. The control unit is connected with the sensing element 5 and each electromagnetic valve 17, when the sensing element 5 senses a sensed object 51, the sensing element 5 sends a sensing signal to the control unit, and the control unit controls the second branch 12 to be switched on or switched off through the electromagnetic valve 17.
Referring to fig. 1, fig. 2 and fig. 3, in the present embodiment, a plurality of second branches 12 are provided, each second branch 12 is provided with a second relief valve 16 and a solenoid valve 17, and relief pressure values of the second relief valves 16 in each second branch 12 are different. The push plate back pressure control system further comprises a plurality of groups of sensing devices, the number of the sensing devices is the same as that of the second branches 12, and one group of sensing devices is used for controlling the connection or disconnection of one second branch 12.
If the number of the second branches 12 is 1, the number of the groups of the sensing devices is 1; if the number of the second branches 12 is 2, the number of the groups of the sensing devices is 2; if the number of the second branches 12 is 3, the number of the groups of the sensing devices is 3; if the number of the second branches 12 is 4, the number of the groups of the sensing devices is 4 … …, each group of sensing devices comprises a sensing element 5 and a sensor 51, the push plate cylinder 2 further comprises a multi-stage slidably sleeved cylinder barrel 24, and the cylinder barrel 24 is extended and retracted through a piston rod 25 of the push plate cylinder 2. Each sensing element 5 is arranged on the piston rod 25 of the push plate cylinder 2, and each sensing object 51 is arranged on the outer wall of the cylinder barrel 24 of the push plate cylinder 2. Preferably, each inductor 51 is respectively arranged on the outer wall of different cylinders 24, that is, only 1 inductor 51 is arranged on the outer wall of 1 cylinder 24, and the structure is shown in fig. 6 and 7.
In this embodiment, the sensing device may be a proximity switch or a displacement sensor.
The proximity switch is a position switch which can be operated without mechanical direct contact with a moving part, and when the sensing surface of the object proximity switch reaches an action distance, the switch can be actuated without mechanical contact and any pressure. The inductor 51 may be a metal, the inductive element 5 is connected to the control unit, and the inductive element 5 has a switching amplifier, an oscillator circuit and a signal trigger. When the sensor 51 is at a predetermined distance from the sensor element 5, the control unit can send a message to the solenoid valve 17 to replace the pressure overflow value.
The displacement sensor can sense the distance between certain objects to complete a preset certain function, the sensing element 5 is provided with a signal sending end and a signal receiving end, the signal sending end sends infrared rays to the sensing object 51, the signal receiving end receives the infrared rays reflected by the sensing object 51 and sends distance information to the control unit, and the control unit can send information of replacing pressure overflow pressure values to the electromagnetic valve 17 at the preset distance between the sensing object 51 and the sensing element 5.
The sensing device is used for acquiring the position information of the push plate 21, and the acquisition method of the position of the push plate 21 comprises the following steps: during the loading operation of the garbage truck, the push plate oil cylinder 2 is pressed back one by one, and when a certain level of cylinder barrel 24 provided with the inductor 51 is pressed back to the proper position, the inductor 51 just triggers the induction element 5, so that the position information of the push plate 21 is obtained. When the push plate oil cylinder 2 is pressed back to a specific stroke, the trigger sensing element 5 transmits the position information of the push plate 21 to the control unit, the control unit sends a backpressure switching instruction, and the switching of the multi-stage backpressure is realized through the electromagnetic valve 17, the first overflow valve 15 and the second overflow valve 16.
Referring to fig. 1, fig. 2 and fig. 3, in the present embodiment, the relief pressure value of the first relief valve 15 is greater than the relief pressure value of the second relief valve 16. The oil path of the first overflow valve 15 is always in a connected state and is set as the upper limit of the push plate backpressure overflow pressure value required by the garbage truck. The relief pressure value of the first relief valve 15 may be set to 5.5MPA, and the relief pressure value of the second relief valve 16 may be set to 3 MPA; the relief pressure value of the first relief valve 15 may be set to 6MPA, and the relief pressure value of the second relief valve 16 may be set to 3.3 MPA;
when the plurality of second relief valves 16 are connected in parallel with the first relief valve 15, the relief valve having a lower relief pressure value functions, and the relief valve having a higher relief pressure value automatically fails. Therefore, the electromagnetic valve 17 connected with the second overflow valve 16 in series is opened, so that the second branch 12 where the second overflow valve 16 is located can be communicated, and the switching of a plurality of different backpressure overflow pressure values is controlled subsequently, so that the multistage backpressure conversion of the push plate is realized.
Referring to fig. 1, in the present embodiment, the push plate cylinder 2, the slide plate cylinder 3, and the squeegee cylinder 4 are further connected to the oil source 6 through a reversing valve 8, respectively. In this way, the on/off of the oil passage can be adjusted by the selector valve 8.
Referring to fig. 8, in this embodiment, the push plate backpressure control system further includes a power supply, and the power supply is used for supplying power to the control unit, the electromagnetic valve, the sensing device, the reversing valve, and other components on the compression-type garbage truck. The circuit also comprises a relay 120, a fuse and a working lamp 130, which play a role in ensuring the safe operation of the circuit.
Referring to fig. 8, in this embodiment, the push plate backpressure control system further includes an information obtaining module 100, where the information obtaining module 100 includes a sensing device and other information obtaining unit monomers, and the plurality of information obtaining unit monomers are a first information obtaining unit monomer 101, a second information obtaining unit monomer 102, a third information obtaining unit monomer 103, a fourth information obtaining unit monomer 104, a fifth information obtaining unit monomer 105, a sixth information obtaining unit monomer 106, and a seventh information obtaining unit monomer 107, respectively. The method specifically comprises the following steps: the control unit acquires sensing information of a backpressure switching position (used for judging whether different backpressure overflow pressure values need to be switched) through the sensing element 5; the control unit acquires sensing information pushed out by the push plate and sensing information retracted by the push plate through the first information acquisition unit body 101; the control unit acquires the induction information of the pressing-in-place of the scraper through the second information acquisition unit body 102; the control unit acquires the inductive information of the rotation of the scraper and the inductive information of the pressing of the scraper through the third information acquisition unit monomer 103; the control unit acquires induction information of the scraper rotating in place through the fourth information acquisition unit body 104; the control unit acquires the induction information of the slide plate in the downward position through the fifth information acquisition unit monomer 105; the control unit acquires the slide plate descending induction information and the slide plate ascending induction information through the sixth information acquisition unit body 106; the control unit acquires the sensing information of the slide plate moving upwards in place through the seventh information acquisition unit 107.
Referring to fig. 8, in the present embodiment, the push plate backpressure control system further includes an action executing module 110, and the action executing module 110 includes a plurality of executing unit elements, which are a first executing unit element 111, a second executing unit element 112, a third executing unit element 113, a fourth executing unit element 114, a fifth executing unit element 115, a sixth executing unit element 116, and a seventh executing unit element 117. The control unit controls the back pressure switching by the first actuator element 111 and the sensing information of the back pressure switching position. The method specifically comprises the following steps: the control unit controls the push plate to push out through the second execution unit element 112; the control unit controls the push plate to retract through a third execution unit element 113; the control unit controls blade depression via a fourth actuator element 114; the control unit controls the blade to rotate up through a fifth execution unit element 115; the control unit controls the sliding plate to descend through a sixth execution unit element 116; the control unit controls the sledge to move upwards via the seventh execution unit element 117.
Referring to fig. 1, in the present embodiment, the push plate backpressure control system further includes a pump 7, the pump 7 is located between the push plate cylinder 2 and the oil source 6, between the slide plate cylinder 3 and the oil source 6, and between the scraper cylinder 4 and the oil source 6, and the pump 7 is configured to increase a flow rate of oil in an oil path to improve operation efficiency, for example, the pump 7 rapidly provides the oil source 6 to the push plate cylinder 2, the slide plate cylinder 3, and the scraper cylinder 4, and/or the pump 7 supplies oil in the push plate cylinder 2, the slide plate cylinder 3, and the scraper cylinder 4 to the oil source 6.
It should be noted that the relief valve plays a role of safety protection in the system, and when the pressure in the loop exceeds the set relief pressure value of the relief valve, the valve is opened for unloading. Also, the second valve may be a relief valve or a back pressure valve.
Because the existing large-tonnage compression type garbage truck 9 has more stages of push plate oil cylinders 2, the problem of 'front looseness and back tightness' that garbage at the front end of the box body 91 is not compacted and garbage at the back end is too compacted is obvious, and the garbage compaction density is not uniform. The single fixed back pressure value of the existing back pressure system also becomes a contradiction design point, if the back pressure value is lower, the garbage is not pressed in the early stage, and the carrying space in the compression type garbage truck 9 cannot be fully utilized; if the back pressure value is high, the later-stage garbage press mounting needs too high scraping and climbing force F2, and the power of the sliding plate is insufficient.
In order to solve the technical problem, the present embodiment further provides a compression-type garbage truck, and the compression-type garbage truck 9 includes the push plate backpressure control system according to any one of the above embodiments. The compression type garbage truck 9 of the push plate backpressure control system has the following beneficial effects:
(1) the garbage press mounting early stage adopts a higher back pressure value, the defect that garbage at the front end of the box body is not pressed tightly is solved, the carrying space of the box body is fully utilized, and the effects of small box body and large loading capacity are achieved.
(2) The garbage press mounting later stage adopts lower backpressure value, and the press mounting device needs too high climbing force of scraping when avoiding later stage pressure equipment, has solved the defect problem that "the later stage climbed motionlessly", and keeps the chassis power of garbage truck and stabilize output, makes the chassis maintain best power state.
(3) An oil return pipeline of the control loop is connected to an oil return cavity of the hydraulic loop on the oil cavity of the sliding plate in the garbage extruding direction, and when garbage is pressed in the box body in the pressing operation process, the oil return cavity of the oil cavity of the sliding plate is in an open unloading oil return state, so that the push plate is pressed back to the back pressure control loop to take effect, the back pressure is established, and the bidirectional compression function is realized; when the push plate is unloaded, the push plate is pressed back to the backpressure control circuit to lose efficacy by virtue of the closed state of the hydraulic circuit on the oil cavity of the sliding plate, and the unloading pushing and unloading force of the push plate is not influenced by the backpressure circuit.
(4) The piston rod of the push plate oil cylinder does not have translational motion relative to the box body, and the sensing element of the backpressure switching information acquisition unit is arranged on the piston rod of the push plate oil cylinder or on an object which is static relative to the head of the piston rod, so that the sensing element is prevented from doing long-distance translational motion along with the cylinder barrel, and the fault problem caused by repeated dragging of a wired sensing element signal line is avoided.
(5) The acquired push plate position information can be used for controlling backpressure switching, can also be used for full-box early warning or other functions, and provides technical support for further intelligent design of the garbage truck.
It should be noted that, although the above embodiments have been described herein, the invention is not limited thereto. Therefore, based on the innovative concepts of the present invention, the technical solutions of the present invention can be directly or indirectly applied to other related technical fields by making changes and modifications to the embodiments described herein, or by using equivalent structures or equivalent processes performed in the content of the present specification and the attached drawings, which are included in the scope of the present invention.
Claims (10)
1. The push plate backpressure control system is characterized by comprising a control loop, a push plate oil cylinder and a slide plate oil cylinder;
the piston in the push plate oil cylinder divides the interior of the push plate oil cylinder into a first push plate oil cavity and a second push plate oil cavity, and the piston in the slide plate oil cylinder divides the interior of the slide plate oil cylinder into a first slide plate oil cavity and a second slide plate oil cavity;
the control circuit comprises an oil inlet pipeline, an oil return pipeline, a first branch and a second branch, wherein the first branch is provided with a first overflow valve, the second branch is provided with a second overflow valve and an electromagnetic valve, one end of the first branch and one end of the second branch are connected with the second push plate oil cavity through the oil inlet pipeline, the other end of the first branch and the other end of the second branch are connected with the first slide plate oil cavity through the oil return pipeline, and the first push plate oil cavity and the second slide plate oil cavity are respectively used for connecting an oil source.
2. The push plate backpressure control system of claim 1, wherein the control system further comprises a push plate and a slide plate;
the push plate with the slide is just to setting up, the push plate sets up on the push plate hydro-cylinder, the push plate hydro-cylinder is used for driving the push plate and removes, the slide sets up on the slide hydro-cylinder, the slide hydro-cylinder is used for driving the slide and removes.
3. The pusher back pressure control system of claim 2, wherein the control system further comprises a tank and a hopper;
the box body is hinged with the charging hopper, and when the charging hopper rotates along the hinged part and is attached to the opening at one side of the box body, the charging hopper covers the opening at one side of the box body;
the push plate and the push plate oil cylinder are both arranged in the box body, the push plate oil cylinder is used for pushing the push plate to reciprocate along the length direction of the box body, and the length direction of the box body is parallel to the direction from the other side of the box body to one side of the box body, which is open;
the sliding plate and the sliding plate oil cylinder are arranged in the charging hopper, the sliding plate is inclined to the length direction of the box body, and the sliding plate oil cylinder is used for pushing the sliding plate to reciprocate along the length direction of the box body.
4. The push plate backpressure control system of claim 2, wherein the push plate provides a first wall and a second wall;
the first wall is connected with the second wall, the first wall and the second wall are obliquely arranged, and the push plate oil cylinder is connected with the second wall.
5. The push plate backpressure control system of claim 2 or claim 3, wherein the control system further comprises a scraper and a scraper cylinder;
the scraper is hinged with the end part of the sliding plate, the scraper oil cylinder is arranged on the sliding plate, and the scraper oil cylinder is used for driving the scraper to rotate at the hinged part.
6. The push plate backpressure control system of claim 1, 2 or 3, wherein the second branch is multiple, the second relief valve on each second branch has different relief pressure values, and the push plate backpressure control system further comprises multiple sets of sensing devices;
the number of the induction devices is the same as that of the second branches, each group of induction devices comprises an induction element and an inductor, the push plate cylinder further comprises a multi-stage sliding sleeved cylinder barrel, and the cylinder barrel is stretched through a piston rod of the push plate cylinder;
each induction element is arranged on a piston rod of the push plate oil cylinder, and each inductor is arranged on the outer wall of the cylinder barrel of the push plate oil cylinder.
7. The push plate backpressure control system of claim 6, further comprising a control unit;
the control unit is connected with the sensing elements and each electromagnetic valve, when the sensing elements sense sensing objects, the sensing elements send sensing signals to the control unit, and the control unit controls the second branch circuit to be connected or disconnected through the electromagnetic valves.
8. The push plate backpressure control system of claim 1, wherein a relief pressure value of the first relief valve is greater than a relief pressure value of the second relief valve.
9. The push plate backpressure control system of claim 1, further comprising a pump;
the pump is positioned between the push plate oil cylinder and the oil source and between the sliding plate oil cylinder and the oil source.
10. A compression garbage truck comprising a push plate backpressure control system as claimed in any one of claims 1 to 9.
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