CN113007160A - Hydraulic control system of garbage truck, garbage truck and hydraulic control method of garbage truck - Google Patents
Hydraulic control system of garbage truck, garbage truck and hydraulic control method of garbage truck Download PDFInfo
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- CN113007160A CN113007160A CN202110333835.9A CN202110333835A CN113007160A CN 113007160 A CN113007160 A CN 113007160A CN 202110333835 A CN202110333835 A CN 202110333835A CN 113007160 A CN113007160 A CN 113007160A
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 230000009471 action Effects 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims description 12
- 238000005056 compaction Methods 0.000 abstract description 6
- 238000007906 compression Methods 0.000 description 26
- 230000006835 compression Effects 0.000 description 18
- 239000012530 fluid Substances 0.000 description 7
- 238000001802 infusion Methods 0.000 description 6
- 230000001502 supplementing effect Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000001125 extrusion Methods 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 238000005336 cracking Methods 0.000 description 3
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- 239000000945 filler Substances 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
- F15B11/028—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force
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Abstract
本发明提供了一种垃圾车的液压控制系统、垃圾车及垃圾车的液压控制方法。液压控制系统包括：主供油通路；推铲油缸，用于驱动垃圾车的推铲进行伸缩动作；滑板油缸，用于驱动垃圾车的滑板沿滑板油缸的活塞杆的轴线方向直线运动，推铲油缸和滑板油缸并联设置在主供油通路上；第一压力控制阀，第一压力控制阀的进口与推铲油缸的无杆腔连通，第一压力控制阀的出口与油箱连通，且第一压力控制阀的控制端与滑板油缸的驱动腔连通，当滑板油缸的驱动腔的压力值达到第一预设值时，第一压力控制阀的进口和第一压力控制阀的出口连通，以调节推铲油缸的无杆腔的压力。本发明的技术方案的液压控制系统能够调节推铲的背压，以提高对垃圾的压实程度。
The invention provides a hydraulic control system of a garbage truck, a garbage truck and a hydraulic control method of the garbage truck. The hydraulic control system includes: the main oil supply passage; the dozer oil cylinder, which is used to drive the dozer of the garbage truck to perform telescopic action; the slide plate oil cylinder, which is used to drive the slide plate of the garbage truck to move linearly along the axis of the piston rod of the slide plate oil cylinder, and the dozer blade The oil cylinder and the slide oil cylinder are arranged in parallel on the main oil supply passage; the first pressure control valve, the inlet of the first pressure control valve is communicated with the rodless cavity of the dozer oil cylinder, the outlet of the first pressure control valve is communicated with the oil tank, and the first pressure control valve is communicated with the oil tank. The control end of the pressure control valve is communicated with the drive chamber of the slide cylinder. When the pressure value of the drive chamber of the slide cylinder reaches the first preset value, the inlet of the first pressure control valve is communicated with the outlet of the first pressure control valve to adjust The pressure in the rodless cavity of the dozer cylinder. The hydraulic control system of the technical solution of the present invention can adjust the back pressure of the dozer to improve the degree of compaction of the garbage.
Description
Technical Field
The invention relates to the technical field of garbage trucks, in particular to a hydraulic control system of a garbage truck, the garbage truck and a hydraulic control method of the garbage truck.
Background
The compression garbage truck is a special vehicle integrating organic, electric and hydraulic systems, and realizes the functions of dumping, crushing or flattening, powerful loading, extruding and compacting garbage into a carriage, pushing and unloading the garbage and the like through special devices such as the carriage, a packer, a sliding plate, a push shovel, a tipping bucket, a feeding mechanism and the like. The basic working process of the garbage truck is as follows: the loading mechanism (bucket turning and tipping mechanism and the like) pours the garbage into the filler, the sliding plate mechanism acts (the tipping bucket is opened, the sliding plate goes downwards, the tipping bucket is closed, and the sliding plate goes upwards), the sliding plate drives the tipping bucket and the garbage in the tipping bucket to go upwards, after the upward force of the sliding plate is transmitted to the push shovel, the sliding plate and the push shovel jointly extrude the garbage between the sliding plate and the push shovel, so that the push shovel oil cylinder generates back pressure, the garbage can be compressed in two directions, and the compression is completed. When the rodless cavity of the push shovel oil cylinder reaches a certain value, oil in the rodless cavity of the push shovel oil cylinder is unloaded and returns to the oil tank, and meanwhile, the push shovel oil cylinder drives the push shovel to retreat.
The garbage truck in the prior art can not effectively compress different kinds of garbage according to different degrees, so that the garbage truck is difficult to compress different kinds of garbage reasonably.
Disclosure of Invention
The invention mainly aims to provide a hydraulic control system of a garbage truck, the garbage truck and a hydraulic control method of the garbage truck.
In order to achieve the above object, the present invention provides a hydraulic control system of a garbage truck, the hydraulic control system comprising: one end of the main oil supply passage is communicated with the oil tank, and the other end of the main oil supply passage is communicated with the oil pump; the push shovel oil cylinder is used for driving a push shovel of the garbage truck to perform telescopic action; the sliding plate oil cylinder is used for driving a sliding plate of the garbage truck to linearly move along the axis direction of a piston rod of the sliding plate oil cylinder, and the push shovel oil cylinder and the sliding plate oil cylinder are arranged on the main oil supply passage in parallel; the inlet of the first pressure control valve is communicated with the rodless cavity of the push shovel oil cylinder, the outlet of the first pressure control valve is communicated with the oil tank, the control end of the first pressure control valve is communicated with the driving cavity of the sliding plate oil cylinder, and when the pressure value of the driving cavity of the sliding plate oil cylinder reaches a first preset value, the inlet of the first pressure control valve is communicated with the outlet of the first pressure control valve so as to adjust the pressure of the rodless cavity of the push shovel oil cylinder; and the controller is connected with the first pressure control valve to adjust the opening pressure of the first pressure control valve.
Further, the hydraulic control system further comprises a second pressure control valve, the second pressure control valve is provided with an inlet, a first outlet and a control end, the inlet of the second pressure control valve and the control end of the second pressure control valve are communicated with the rodless cavity of the push shovel oil cylinder, the first outlet of the second pressure control valve is communicated with the oil tank, when the pressure of the rodless cavity of the push shovel oil cylinder reaches a second preset value, the inlet of the second pressure control valve is communicated with the first outlet of the second pressure control valve, wherein the first preset value is larger than the second preset value, and the controller can control the opening pressure of the second pressure control valve.
Further, the second pressure control valve also has a second outlet, and the inlet of the first pressure control valve is in communication with the second outlet of the second pressure control valve.
Further, the hydraulic control system further includes: an oil pump; the overflow valve is arranged on the main oil supply passage and is connected with the push shovel oil cylinder in parallel, the inlet of the overflow valve is communicated with the oil pump, and the outlet of the overflow valve is communicated with the oil tank; or the hydraulic control system also comprises a connecting oil path, and the control end of the first pressure control valve is communicated with the driving cavity of the sliding plate oil cylinder through the connecting oil path.
Furthermore, the hydraulic control system also comprises a selection valve, an oil inlet of the selection valve is communicated with the oil pump, an oil outlet of the selection valve is communicated with the oil tank, and the selection valve is connected with the push shovel oil cylinder in parallel.
Further, the hydraulic control system further includes: the scraper oil cylinder is arranged on the main oil supply passage and is used for driving a tipping bucket of the garbage truck to rotate; and the scraper reversing valve is communicated with the scraper oil cylinder to control the oil way of the scraper oil cylinder to be reversed.
Further, the hydraulic control system further includes: the push shovel reversing valve is communicated with the push shovel oil cylinder to control the oil way of the push shovel oil cylinder to be reversed; and the sliding plate reversing valve is communicated with the sliding plate oil cylinder to control the oil way of the sliding plate oil cylinder to be reversed.
Furthermore, the hydraulic control system also comprises a liquid supplementing pipeline and a liquid supplementing one-way valve arranged on the liquid supplementing pipeline, a rod cavity of the push shovel oil cylinder is communicated with the oil tank through the liquid supplementing pipeline, and an outlet of the liquid supplementing one-way valve is communicated with the rod cavity of the push shovel oil cylinder.
According to another aspect of the invention, the invention provides a garbage truck, which comprises the hydraulic control system of the garbage truck, a push shovel in control connection with a push shovel oil cylinder, and a sliding plate in connection with a sliding plate oil cylinder.
Furthermore, the garbage truck further comprises a guide structure arranged on the inner wall of the packer, the sliding plate oil cylinder is a double-piston-rod oil cylinder, the double-piston-rod oil cylinder comprises a cylinder body and two piston rods located in the cylinder body, the cylinder body is arranged on the inner wall of the packer of the garbage truck, one of the two piston rods is connected with the sliding plate, and the other of the two piston rods is in sliding fit with the guide structure, so that the sliding plate can be movably arranged along the axial direction of the piston rods.
According to another aspect of the present invention, the present invention provides a hydraulic control method for a garbage truck, the hydraulic control method is controlled by using the above hydraulic control system, and the hydraulic control method includes: a pressure adjusting step of adjusting the opening pressure of the first pressure control valve according to the type of the garbage to be compressed; acquiring a pressure value of a driving cavity of the sliding plate oil cylinder; comparing the pressure value with a first preset value; and adjusting the pressure of the rodless cavity of the blade oil cylinder through the first pressure control valve.
Further, before the obtaining step, the comparing step, and the adjusting step, the hydraulic control method further includes: acquiring a pressure value of a rodless cavity of a push shovel oil cylinder; and comparing the pressure value of the rodless cavity of the push shovel oil cylinder with a second preset value, and adjusting the pressure of the rodless cavity of the push shovel oil cylinder when the pressure value of the rodless cavity of the push shovel oil cylinder is greater than the second preset value, wherein the first preset value is greater than the second preset value.
By applying the technical scheme of the invention, the first pressure control valve is communicated with the rodless cavity of the push shovel oil cylinder, the first preset value can be adjusted through the controller according to different garbage types (namely the controller can set the opening pressure of the first pressure control valve according to the garbage types), and when the pressure value of the driving cavity of the sliding plate oil cylinder does not reach the first preset value, the sliding plate oil cylinder drives the sliding plate to move towards the push shovel, so that the garbage is compressed, and the garbage is compacted; when the garbage reaches the maximum compression amount, the pressure value of the driving cavity of the sliding plate oil cylinder reaches a first preset value (namely the first pressure control valve reaches the opening pressure), and oil in the rodless cavity of the push shovel oil cylinder returns to the oil tank through the first pressure control valve, so that the pressure relief of the rodless cavity of the push shovel oil cylinder is realized. In the compression process to rubbish, through setting for first default according to different types of rubbish, can make the shovel of pushing away can produce the negative pressure of suitable size when compressing rubbish, can exert the extrusion force that the size is suitable to rubbish with the slide like this jointly to can make rubbish reach the maximum compression volume, improve the compaction degree to rubbish, reach good compression effect.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 shows a schematic diagram of a hydraulic control system of a garbage truck of an embodiment of the present invention;
FIG. 2 shows an enlarged partial view of the hydraulic control system of the refuse vehicle of FIG. 1;
FIG. 3 shows a schematic structural view of a garbage truck of an embodiment of the present invention;
FIG. 4 shows an enlarged partial view of the garbage truck of FIG. 3;
FIG. 5 shows a schematic structural view of the skid plate cylinder and the squeegee cylinder of the garbage truck of FIG. 3; and
fig. 6 shows a flow chart of a hydraulic control method of the garbage truck according to the embodiment of the invention.
Wherein the figures include the following reference numerals:
1. a main oil supply passage; 2. tipping; 3. a packer; 4. connecting an oil way; 5. a liquid supplementing pipeline; 10. a push shovel cylinder; 15. a push shovel directional control valve; 20. a slide plate cylinder; 21. a cylinder body; 22. a piston rod; 25. a slide plate reversing valve; 30. a first pressure control valve; 41. an oil tank; 42. an oil pump; 50. a second pressure control valve; 60. an overflow valve; 70. a selector valve; 80. a scraper oil cylinder; 85. a blade reversing valve; 90. fluid infusion check valve.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
It should be noted that the hydraulic control system of the garbage truck in the embodiment of the present invention can ensure the balance of the compression density of the garbage in the garbage can of the whole garbage truck, and avoid the problem of the front part of the garbage can being light and the back part of the garbage can being heavy due to the uneven density of the garbage in the garbage can, thereby preventing the potential safety hazard.
It should be noted that the hydraulic control system of the garbage truck according to the embodiment of the present invention can provide an appropriate garbage compression ratio according to different loading requirements of different users. The back pressure of the push shovel is adjusted by adjusting the pressure of a rodless cavity of the push shovel oil cylinder, so that the compaction degree of the garbage is improved. In the present invention and the embodiments of the present invention, the first preset value refers to the opening pressure of the first pressure control valve 30, which can be adjusted by the controller. The second preset value refers to the cracking pressure of the second pressure control valve 50, and the cracking pressure of the second pressure control valve 50 can also be adjusted by the controller.
As shown in fig. 1 and 2, an embodiment of the present invention provides a hydraulic control system for a garbage truck. The hydraulic control system includes a main oil supply passage 1, a dozer cylinder 10, a slide cylinder 20, a first pressure control valve 30, and a controller. One end of the main oil supply passage 1 communicates with the oil tank 41, and the other end of the main oil supply passage 1 communicates with the oil pump 42; the push shovel oil cylinder 10 is used for driving a push shovel of the garbage truck to perform telescopic action; the sliding plate oil cylinder 20 is used for driving a sliding plate of the garbage truck to linearly move along the axial direction of a piston rod of the sliding plate oil cylinder 20, and the push shovel oil cylinder 10 and the sliding plate oil cylinder 20 are arranged on the main oil supply passage 1 in parallel; the inlet of the first pressure control valve 30 is communicated with the rodless cavity of the dozer cylinder 10, the outlet of the first pressure control valve 30 is communicated with the oil tank 41, the control end of the first pressure control valve 30 is communicated with the driving cavity of the slide plate cylinder 20, and when the pressure value of the driving cavity of the slide plate cylinder 20 reaches a first preset value, the inlet of the first pressure control valve 30 is communicated with the outlet of the first pressure control valve 30 so as to adjust the pressure of the rodless cavity of the dozer cylinder 10; the controller is connected to the first pressure control valve 30 to adjust the cracking pressure of the first pressure control valve 30.
In the technical scheme, the first pressure control valve 30 is communicated with the rodless cavity of the push shovel oil cylinder 10, the first preset value can be adjusted according to different garbage types (namely the opening pressure of the first pressure control valve 30 can be set according to the garbage types), and when the pressure value of the driving cavity of the sliding plate oil cylinder 20 does not reach the first preset value, the sliding plate oil cylinder 20 drives the sliding plate to move towards the push shovel, so that the garbage is compressed, and the garbage is compacted; when the garbage reaches the maximum compression amount, when the pressure value of the driving cavity of the sliding plate oil cylinder 20 reaches a first preset value (namely the first pressure control valve 30 reaches the opening pressure), the first pressure control valve 30 is in an opening state, and oil in the rodless cavity of the push shovel oil cylinder 10 returns to the oil tank through the first pressure control valve 30, so that the pressure relief of the rodless cavity of the push shovel oil cylinder 10 is realized. In the compression process of carrying out the compression to rubbish, the inventor can set for first default according to different kind rubbish, pushes away the shovel and can produce the negative pressure of suitable size when compressing rubbish, pushes away the shovel like this and can exert the extrusion force that the size is suitable to rubbish jointly with the slide to can make rubbish reach the maximum compression volume, improve the compaction degree to rubbish, reach good compression effect.
Specifically, in the embodiment of the present invention, the sled cylinder 20 has a drive chamber and a return chamber. In the compression process for compressing garbage, the driving chamber of the slide plate cylinder 20 is communicated with the oil pump 42, and the oil return chamber of the slide plate cylinder 20 is communicated with the oil tank, so that a loop is formed. The oil pump 42 is used for supplying oil to the driving cavity of the slide plate cylinder 20, so that the slide plate cylinder 20 drives the slide plate to move along the extension direction of the piston rod of the slide plate cylinder 20.
Specifically, in the embodiment of the present invention, the control end of the first pressure control valve 30 is communicated with the driving cavity of the slide plate cylinder 20, so that the first pressure control valve 30 (i.e., the outlet and the inlet of the first pressure control valve 30) can be opened by the pilot oil in the driving cavity of the slide plate cylinder 20, so that the rodless cavity of the blade cylinder 10 is communicated with the oil tank 41 through the first pressure control valve 30, thereby realizing the pressure relief of the rodless cavity of the blade cylinder 10, so that the blade cylinder 10 drives the blade to retreat.
Preferably, in an embodiment of the present invention, the first pressure control valve 30 is a two-position two-way mechanical directional valve.
In the embodiment of the present invention, the drive chamber of the slide plate cylinder 20 refers to an oil chamber of the slide plate cylinder 20 communicating with the oil pump 42.
As shown in fig. 1 and 2, in the embodiment of the present invention, the hydraulic control system further includes a second pressure control valve 50, the second pressure control valve 50 has an inlet, a first outlet and a control end, the inlet of the second pressure control valve 50 and the control end of the second pressure control valve 50 are both communicated with the rodless cavity of the dozer cylinder 10, the first outlet of the second pressure control valve 50 is communicated with the oil tank 41, when the pressure of the rodless cavity of the dozer cylinder 10 reaches a second preset value, the inlet of the second pressure control valve 50 is communicated with the first outlet of the second pressure control valve 50, wherein the first preset value is greater than the second preset value, and the controller can control the opening pressure of the second pressure control valve 50.
In the technical scheme, by arranging the second pressure control valve 50, an inlet and a control end of the second pressure control valve 50 are both communicated with the rodless cavity of the push shovel oil cylinder 10, a second preset value can be adjusted according to different garbage types (namely, the opening pressure of the second pressure control valve 50 can be set according to the garbage types), and when the pressure value of the rodless cavity of the push shovel oil cylinder 10 does not reach the second preset value, the sliding plate oil cylinder 20 drives the sliding plate to move towards the push shovel, so that the garbage is compressed, and the garbage is compacted; when the garbage reaches the maximum compression amount, the pressure value of the rodless cavity of the push shovel oil cylinder 10 reaches a second preset value (namely the second pressure control valve 50 reaches the opening pressure), and oil in the rodless cavity of the push shovel oil cylinder 10 returns to the oil tank through the first outlet of the second pressure control valve 50, so that the pressure relief of the rodless cavity of the push shovel oil cylinder 10 is realized.
In the compression process of compressing rubbish, the second preset value is set according to different types of rubbish, so that the pushing shovel can generate negative pressure of a proper size when compressing rubbish, the pushing shovel can apply a proper extrusion force to the rubbish together with the sliding plate, accordingly, the rubbish can reach the maximum compression amount, the compaction degree of the rubbish is improved, and a good compression effect is achieved.
Specifically, in the embodiment of the present invention, by making the first preset value larger than the second preset value, in the compression process of the compressed garbage, the hydraulic control system may compare the pressure value of the rodless cavity of the push shovel cylinder 10 with the second preset value, and when the pressure value of the rodless cavity of the push shovel cylinder 10 reaches the second preset value (i.e. the garbage is in a compacted state), the second pressure control valve 50 may be opened, so that the rodless cavity of the push shovel cylinder 10 is communicated with the oil tank 41 through the second pressure control valve 50, thereby implementing pressure relief; when the second pressure control valve 50 fails in the pressure relief process of the rodless cavity of the blade cylinder 10, the rodless cavity of the blade cylinder 10 cannot be continuously relieved, and the problem of clamping of the blade cylinder 10 can occur, at this time, the driving cavity of the slide plate cylinder 20 is always in a pressurized state, namely, the pressure of the slide plate cylinder 20 can be always increased until the second preset value is reached, so that the first pressure control valve 30 can be opened, the rodless cavity of the blade cylinder 10 is connected with the oil tank through the first pressure control valve 30, the pressure relief of the rodless cavity of the blade cylinder 10 is further realized, and the problem that the rodless cavity of the blade cylinder 10 cannot be relieved due to the failure of the second pressure control valve 50 can be avoided.
Specifically, in the embodiment of the present invention, by providing the first pressure control valve 30 and the second pressure control valve 50, not only the pressure relief operation of the blade cylinder 10 is ensured, but also the stability of the entire system can be ensured.
Preferably, in an embodiment of the present invention, the second pressure control valve 50 is a pilot operated relief valve.
In an embodiment of the present invention, as shown in fig. 2, the second pressure control valve 50 also has a second outlet, and the inlet of the first pressure control valve 30 communicates with the second outlet of the second pressure control valve 50.
Through the arrangement, the first pressure control valve 30 is communicated with the rodless cavity of the push shovel oil cylinder 10 through the second outlet of the second pressure control valve 50, so that oil in the rodless cavity of the push shovel oil cylinder 10 returns to the oil tank through the first pressure control valve 30, and the rodless cavity of the push shovel oil cylinder 10 is decompressed through the first pressure control valve 30.
Specifically, in the embodiment of the present invention, the second pressure control valve 50 is provided with a bypass valve, and the oil in the rodless chamber of the blade cylinder 10 flows to the bypass valve through the inlet of the second pressure control valve 50, and flows to the second outlet of the second pressure control valve 50 through the bypass valve, and then flows to the inlet of the first pressure control valve 30 through the second outlet of the second pressure control valve 50, so that the rodless chamber of the blade cylinder 10 can be depressurized by the first pressure control valve 30.
As shown in fig. 1, in the embodiment of the present invention, the hydraulic control system further includes an oil pump 42 and a relief valve 60. The overflow valve 60 is disposed on the main oil supply passage 1, the overflow valve 60 is disposed in parallel with the blade cylinder 10, an inlet of the overflow valve 60 is communicated with the oil pump 42, and an outlet of the overflow valve 60 is communicated with the oil tank 41.
In the above technical scheme, by arranging the overflow valve 60 and connecting the control end of the overflow valve 60 with the oil pump 42, when the system pressure (i.e. the outlet pressure of the oil pump 42) reaches the third preset value, the inlet of the overflow valve 60 is communicated with the outlet of the overflow valve 60, so that the oil pump 42 is communicated with the oil tank 41, and further the system pressure relief is realized, thereby avoiding the problem that the pipeline is broken due to the rise of the pipeline pressure caused by pipeline blockage or overweight of the execution end and the like.
Preferably, in the embodiment of the present invention, the first preset value and the second preset value are both smaller than a third preset value, and the third preset value is lower than the rated pressure of the oil pump 42. Wherein the third preset value is preferably 20 MPa.
As shown in fig. 1, in the embodiment of the present invention, the hydraulic control system further includes a connection oil passage 4, and the control end of the first pressure control valve 30 is communicated with the drive chamber of the slide plate cylinder 20 through the connection oil passage 4.
With the above arrangement, the first pressure control valve 30 can be opened by the pilot oil in the driving chamber of the slide plate cylinder 20, so that the rodless chamber of the dozer cylinder 10 is communicated with the oil tank 41 through the first pressure control valve 30, thereby realizing the pressure relief of the rodless chamber of the dozer cylinder 10, and enabling the dozer cylinder 10 to drive the dozer blade to retreat.
Specifically, in the embodiment of the present invention, the pilot oil in the driving chamber of the sled cylinder 20 is directly connected to the control end of the first pressure control valve 30, so that the failure rate is low and the control is faster than that in the electric control mode.
As shown in fig. 1, in the embodiment of the present invention, the hydraulic control system further includes a selector valve 70, and the selector valve 70 has an oil inlet and an oil outlet. Wherein, the oil inlet of the selection valve 70 is communicated with the oil pump 42, the oil outlet of the selection valve 70 is communicated with the oil tank 41, and the selection valve 70 is arranged in parallel with the shovel cylinder 10.
In the above technical scheme, the selector valve 70 is in a normally open state, and thus, the oil pump 42 and the oil tank 41 can be communicated through the selector valve 70, so that the hydraulic control system is in a pressure relief state, when the hydraulic control system needs to work, the selector valve 70 starts to work, so that an oil path between the oil pump 42 and the oil tank 41 can be cut off through the selector valve 70, the hydraulic control system can be in a working state, namely, the selector valve 70 starts to work, the whole hydraulic control system can start to work, and therefore the whole system is effectively protected.
As shown in fig. 1, in the embodiment of the present invention, the hydraulic control system further includes a squeegee cylinder 80 and a squeegee direction valve 85. The scraper oil cylinder 80 is arranged on the main oil supply passage 1, and the scraper oil cylinder 80 is used for driving the tipping bucket 2 of the garbage truck to rotate; the flight reversing valve 85 is in communication with the flight cylinder 80 to control the oil path of the flight cylinder 80 to reverse.
With the arrangement, the scraper reversing valve 85 can control the oil circuit of the scraper cylinder 80 to be reversed, so that the scraper cylinder 80 controls the dump bucket 2 of the garbage truck to rotate relative to the packer 3, thereby realizing the opening and closing of the dump bucket 2 to load garbage into the packer 3.
Specifically, in the embodiment of the present invention, when the left side of the squeegee reversing valve 85 is energized, the rod chamber of the squeegee oil cylinder 80 is connected to the oil pump 42, and the rodless chamber of the squeegee oil cylinder 80 is connected to the oil tank 41, so that the piston rod of the squeegee oil cylinder 80 is retracted along its own axis, thereby driving the dump bucket 2 to rotate counterclockwise relative to the packer 3 in fig. 4, so that the dump bucket 2 is in an open state (i.e., a state of dumping garbage); when the right side of the scraper reversing valve 85 is electrified, the rodless cavity of the scraper cylinder 80 is communicated with the oil pump 42, and the rod cavity of the scraper cylinder 80 is communicated with the oil tank 41, so that the piston rod of the scraper cylinder 80 extends along the axis of the piston rod, and the tipping bucket 2 is driven to rotate clockwise relative to the packer 3 in the figure 4, so that the tipping bucket 2 is in a closed state, and therefore garbage enters the tipping bucket 2.
As shown in FIG. 1, in an embodiment of the present invention, the hydraulic control system further includes a blade reversing valve 15 and a slide plate reversing valve 25. Wherein, the shovel directional control valve 15 is communicated with the shovel oil cylinder 10 to control the oil path of the shovel oil cylinder 10 to be reversed; the slide plate reversing valve 25 is communicated with the slide plate cylinder 20 to control the oil path reversing of the slide plate cylinder 20.
Through the arrangement, the push shovel reversing valve 15 can control the oil path of the push shovel oil cylinder 10 to be reversed, so that the push shovel oil cylinder 10 controls the push shovel of the garbage truck to move along the axis of the piston rod of the push shovel oil cylinder 10, and therefore the garbage is pushed and unloaded; the slide plate reversing valve 25 can control the oil path of the slide plate oil cylinder 20 to be reversed, so that the slide plate of the garbage truck moves along the axis of the piston rod of the slide plate oil cylinder 20, and the garbage is compacted or loaded into a garbage can.
Specifically, in the embodiment of the present invention, when the left side of the slide plate reversing valve 25 is powered, the cavity corresponding to the piston rod 22 of the slide plate cylinder 20 not connected with the slide plate in fig. 3 (i.e. the upper cavity of the slide plate cylinder 20 in fig. 3) is communicated with the oil pump 42, and the cavity corresponding to the piston rod 22 of the slide plate cylinder 20 connected with the slide plate (i.e. the lower cavity of the slide plate cylinder 20 in fig. 3) is communicated with the oil tank 41, so that the piston rod 22 of the slide plate cylinder 20 extends along its own axis, thereby driving the slide plate to move downward along the piston rod 22 of the slide plate cylinder 20 relative to the packer 3 in fig. 4, so as to drive the dump bucket 2 to move downward along the piston rod 22 of the slide plate cylinder; when the right side of the slide plate reversing valve 25 is electrified, a cavity corresponding to the piston rod 22 of the slide plate cylinder 20 which is not connected with the slide plate in fig. 3 (namely, an upper cavity of the slide plate cylinder 20 in fig. 3) is communicated with the oil tank 41, a cavity corresponding to the piston rod 22 of the slide plate cylinder 20 which is connected with the slide plate (namely, a lower cavity of the slide plate cylinder 20 in fig. 3) is communicated with the oil pump 42, so that the piston rod 22 of the slide plate cylinder 20 retracts along the axis of the piston rod 22, the slide plate is driven to move upwards along the piston rod 22 of the slide plate cylinder 20 relative to the packer 3 in fig. 4, the dump bucket 2 is driven to move upwards along the piston rod 22 of the slide plate cylinder 20, and the garbage in the dump bucket 2 is brought between the slide plate and the push shovel or.
As shown in fig. 1, in the embodiment of the present invention, the hydraulic control system further includes a fluid infusion pipeline 5 and a fluid infusion check valve 90 disposed on the fluid infusion pipeline 5, the rod cavity of the dozer cylinder 10 is communicated with the oil tank 41 through the fluid infusion pipeline 5, and an outlet of the fluid infusion check valve 90 is communicated with the rod cavity of the dozer cylinder 10.
With the above arrangement, when the piston rod of the blade cylinder 10 retracts along its own axis with respect to the cylinder body, the rod chamber of the blade cylinder 10 generates negative pressure, and the fluid replenishment check valve 90 is opened to communicate the rod chamber of the blade cylinder 10 with the oil tank 41, thereby replenishing oil to the rod chamber of the blade cylinder 10, so that the blade cylinder 10 can be protected from gas erosion, and the piston rod thereof is ensured not to deform.
As shown in fig. 3, the embodiment of the present invention provides a garbage truck, which includes the above-mentioned hydraulic control system of the garbage truck, a shovel connected to the shovel cylinder 10 in a control manner, and a skateboard connected to the skateboard cylinder 20. The garbage truck has all the advantages of the hydraulic control system of the garbage truck, and the detailed description is omitted here. Preferably, the garbage truck is a compression type garbage truck.
As shown in fig. 4 and 5, in the embodiment of the present invention, the garbage truck further includes a guide structure disposed on an inner wall of the packer 3, the sliding plate cylinder 20 is a dual-piston rod cylinder, the dual-piston rod cylinder includes a cylinder body 21 and two piston rods 22 disposed in the cylinder body 21, the cylinder body 21 is disposed on the inner wall of the packer 3 of the garbage truck, one piston rod 22 of the two piston rods 22 is connected to the sliding plate, and the other piston rod 22 of the two piston rods 22 is slidably engaged with the guide structure, so that the sliding plate is movably disposed along an axial direction of the piston rod 22.
Through the arrangement, the cylinder body 21 of the double-piston-rod oil cylinder is fixedly arranged on the packer 3, and the piston rod 22 moves relative to the cylinder body 21, so that the sliding plate on the piston rod 22 is driven to move, and then the garbage is compressed or is loaded into a garbage can. Furthermore, the effective areas of the two oil cavities of the double-piston-rod oil cylinder are equal, so that when the slide plate reversing valve 25 controls the oil way reversing of the slide plate oil cylinder 20, the flow rates of oil respectively entering the two oil cavities of the double-piston-rod oil cylinder can be kept consistent, the problem that the oil way or the oil pump 42 or the push shovel oil cylinder 10 is impacted due to inconsistent flow rates during the oil way reversing is avoided, and the noise generated during the work of the hydraulic control system is reduced.
As shown in fig. 4 and 5, in the embodiment of the present invention, the garbage truck further includes a dump body 2 disposed on the sliding plate, a fixed end of the scraper cylinder 80 is hinged to the sliding plate, and a telescopic end (i.e., a piston rod) of the scraper cylinder 80 is hinged to the dump body 2, so that the scraper cylinder 80 controls the rotation of the dump body 2. Further, the dump body 2 is connected with the slide plate through the scraper cylinder 80, so that the slide plate can drive the dump body 2 and the scraper cylinder 80 to move along the self axis of the piston rod of the slide plate cylinder 20.
As shown in fig. 6, an embodiment of the present invention provides a hydraulic control method of a garbage truck, the hydraulic control method being controlled by the above-mentioned hydraulic control system, the hydraulic control method including a pressure adjusting step of adjusting an opening pressure of a first pressure control valve 30 according to a kind of garbage to be compressed, an obtaining step of obtaining a pressure value of a driving chamber of a sled cylinder 20, a comparing step of comparing the magnitude of the pressure value with a first preset value, and an adjusting step of adjusting a pressure of a rodless chamber of a dozer cylinder 10 by the first pressure control valve 30.
In the above technical scheme, the opening pressure of the first pressure control valve 30 is adjusted according to the type of the garbage to be compressed, then the pressure value of the driving cavity of the sliding plate cylinder 20 is obtained, and is compared with the first preset value, when the pressure value of the driving cavity is greater than or equal to the first preset value, the first pressure control valve 30 is opened, so that the rodless cavity of the push shovel cylinder 10 is communicated with the oil tank 41, and the pressure relief of the rodless cavity of the push shovel cylinder 10 is realized.
It should be noted that, in the embodiment of the present invention, the first preset value may be adjusted according to different garbage types, so that the hydraulic control method may control compression processes of different garbage.
It should be noted that the above-mentioned garbage truck has all the advantages of the hydraulic control system of the above-mentioned garbage truck, and the details are not described herein.
As shown in fig. 6, in the embodiment of the present invention, before the acquiring step, the comparing step, and the adjusting step, the hydraulic control method further includes: acquiring a pressure value of a rodless cavity of the push shovel oil cylinder 10; and comparing the pressure value of the rodless cavity of the blade oil cylinder 10 with a second preset value, and when the pressure value of the rodless cavity of the blade oil cylinder 10 is greater than the second preset value, adjusting the pressure of the rodless cavity of the blade oil cylinder 10, wherein the first preset value is greater than the second preset value.
In the above technical scheme, by obtaining the pressure value of the rodless cavity of the push shovel oil cylinder 10 and comparing the pressure value with the second preset value, when the pressure value of the rodless cavity is greater than or equal to the second preset value, the second pressure control valve 50 is opened, so that the rodless cavity of the push shovel oil cylinder 10 is communicated with the oil tank 41, and therefore pressure relief of the rodless cavity of the push shovel oil cylinder 10 is achieved.
Further, by making the first preset value larger than the second preset value, in the compression process of the garbage, the hydraulic control system can compare the pressure value of the rodless cavity of the push shovel oil cylinder 10 with the second preset value, and when the pressure value of the rodless cavity of the push shovel oil cylinder 10 reaches the second preset value (i.e. the garbage is in a compacted state), the second pressure control valve 50 can be opened, so that the rodless cavity of the push shovel oil cylinder 10 is communicated with the oil tank 41 through the second pressure control valve 50, thereby realizing pressure relief; when the second pressure control valve 50 fails in the pressure relief process of the rodless cavity of the blade cylinder 10, the rodless cavity of the blade cylinder 10 cannot be continuously relieved, and the problem of clamping of the blade cylinder 10 can occur, at this time, the driving cavity of the slide plate cylinder 20 is always in a pressurized state, that is, the pressure of the slide plate cylinder 20 can be always increased until the second preset value is reached, so that the first pressure control valve 30 can be opened, the rodless cavity of the blade cylinder 10 is connected with the oil tank 41 through the first pressure control valve 30, the pressure relief of the rodless cavity of the blade cylinder 10 is further realized, and the problem that the rodless cavity of the blade cylinder 10 cannot be relieved due to the failure of the second pressure control valve 50 can be avoided.
Specifically, in the embodiment of the present invention, before the step of obtaining the pressure value of the rodless chamber of the blade cylinder 10, the hydraulic control method further includes the step of adjusting the opening pressure of the second pressure control valve 50 according to the kind of garbage to be compressed. The opening pressure of the second pressure control valve 50 can be adjusted by the controller according to the type of the garbage to be compressed, and when the pressure value of the push shovel oil cylinder 10 is greater than the opening pressure of the second pressure control valve 50, the second pressure control valve 50 is opened, so that the rodless cavity of the push shovel oil cylinder 10 is communicated with the oil tank 41, and therefore the pressure relief of the rodless cavity of the push shovel oil cylinder 10 is achieved.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects: the first pressure control valve is communicated with the rodless cavity of the push shovel oil cylinder, the first preset value can be adjusted according to different garbage types (namely the opening pressure of the first pressure control valve can be set according to the garbage types), and when the pressure value of the driving cavity of the sliding plate oil cylinder does not reach the first preset value, the sliding plate oil cylinder drives the sliding plate to move towards the push shovel, so that garbage is compressed, and the garbage is compacted; when the garbage reaches the maximum compression amount, the pressure value of the driving cavity of the sliding plate oil cylinder reaches a first preset value (namely the first pressure control valve reaches the opening pressure), and oil in the rodless cavity of the push shovel oil cylinder returns to the oil tank through the first pressure control valve, so that the pressure relief of the rodless cavity of the push shovel oil cylinder is realized. In the compression process to rubbish, through setting for first default according to different types of rubbish, can make the shovel of pushing away can produce the negative pressure of suitable size when compressing rubbish, can exert the extrusion force that the size is suitable to rubbish with the slide like this jointly to can make rubbish reach the maximum compression volume, improve the compaction degree to rubbish, reach good compression effect.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (12)
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110333835.9A CN113007160A (en) | 2021-03-29 | 2021-03-29 | Hydraulic control system of garbage truck, garbage truck and hydraulic control method of garbage truck |
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| CN202110333835.9A CN113007160A (en) | 2021-03-29 | 2021-03-29 | Hydraulic control system of garbage truck, garbage truck and hydraulic control method of garbage truck |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113753445A (en) * | 2021-10-15 | 2021-12-07 | 福建龙马环卫装备股份有限公司 | Push pedal backpressure control system and compression garbage truck |
| CN114483684A (en) * | 2022-01-28 | 2022-05-13 | 北京京环装备设计研究院有限公司 | Hydraulic control system of garbage compression station, garbage compression station and hydraulic control method |
-
2021
- 2021-03-29 CN CN202110333835.9A patent/CN113007160A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113753445A (en) * | 2021-10-15 | 2021-12-07 | 福建龙马环卫装备股份有限公司 | Push pedal backpressure control system and compression garbage truck |
| CN113753445B (en) * | 2021-10-15 | 2024-04-16 | 福龙马集团股份有限公司 | Compression type garbage truck and garbage compression method thereof |
| CN114483684A (en) * | 2022-01-28 | 2022-05-13 | 北京京环装备设计研究院有限公司 | Hydraulic control system of garbage compression station, garbage compression station and hydraulic control method |
| CN114483684B (en) * | 2022-01-28 | 2024-06-07 | 北京京环装备设计研究院有限公司 | Hydraulic control system of garbage compression station, garbage compression station and hydraulic control method |
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