CN111392294A - Garbage compression truck and hydraulic control system thereof - Google Patents
Garbage compression truck and hydraulic control system thereof Download PDFInfo
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- CN111392294A CN111392294A CN201910005879.1A CN201910005879A CN111392294A CN 111392294 A CN111392294 A CN 111392294A CN 201910005879 A CN201910005879 A CN 201910005879A CN 111392294 A CN111392294 A CN 111392294A
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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
- B65F3/24—Vehicles particularly adapted for collecting refuse with devices for unloading the tank of a refuse vehicle
- B65F3/28—Vehicles particularly adapted for collecting refuse with devices for unloading the tank of a refuse vehicle by a lengthwise movement of a wall, e.g. a plate, a piston, or the like
Abstract
The invention relates to the field of hydraulic control, in particular to a garbage compression truck and a hydraulic control system thereof. The hydraulic control system comprises a push shovel oil cylinder, a tail gate locking oil cylinder and a hydraulic oil circuit for controlling the push shovel oil cylinder and the tail gate locking oil cylinder to move, wherein the hydraulic oil circuit comprises a compression oil circuit and a locking oil circuit, the compression oil circuit supplies oil to the push shovel oil cylinder to drive the push shovel oil cylinder to move and compress garbage, the locking oil circuit supplies oil to the tail gate locking oil cylinder to drive the tail gate locking oil cylinder to lock the tail gate, a linkage oil circuit is arranged between the compression oil circuit and the locking oil circuit, a control valve is arranged on the linkage oil circuit, and the control valve controls the linkage oil circuit to be conducted when the compression oil circuit supplies oil to a corresponding cavity of the push shovel. The hydraulic control system can solve the problem that the pressure of a tail gate locking oil cylinder is insufficient due to partial leakage of a locking oil way in the prior art, and the garbage compression truck using the hydraulic control system can solve the problem that the garbage compression truck cannot normally operate due to abnormal opening of a tail gate in the prior art.
Description
Technical Field
The invention relates to the field of hydraulic control, in particular to a garbage compression truck and a hydraulic control system thereof.
Background
The garbage compression truck generally realizes the functions of lifting the garbage can, dumping garbage in the garbage can, opening and closing the tail door, locking the tail door, compressing the garbage and the like through a hydraulic control system.
The hydraulic control system who uses in the rubbish compression car at present generally includes the oil tank, the oil feed oil circuit, the hydraulic pressure valves, function hydro-cylinder and oil return oil circuit, the function hydro-cylinder is including the shovel hydro-cylinder that pushes away that the control shovel carried out compression to rubbish, the tail gate lift hydro-cylinder that the control tail gate opened and shut, the tail gate locking hydro-cylinder that the control tail gate locks, the lift hydro-cylinder that the rubbish bucket ascended and dumped rubbish in the rubbish bucket etc. corresponds every kind of function hydro-cylinder and all is equipped with corresponding control valve alone in the hydraulic pressure valves, the flexible action that corresponds the function hydro-cylinder can be controlled to the control. For example, chinese utility model patent with the publication number CN202402380U discloses a compression garbage truck and a hydraulic system thereof, wherein the hydraulic system controls the extension and retraction of the cylinders with different functions through an individual control valve.
The garbage compression truck is generally provided with a compression box, a push shovel is arranged in the compression box, garbage is compressed in the compression box through the push shovel, the tail part of the compression box is provided with a tail door which can be opened and closed, and the tail door is used for stopping the garbage when the push shovel compresses the garbage; the tail-gate lifts the hydro-cylinder control by the tail-gate and opens and shuts, when the tail-gate is closed, generally need lock the tail-gate, and the mode of tail-gate locking has two kinds usually: the first is to arrange a special tail gate lock pin oil cylinder to control a corresponding tail gate locking structure to lock the tail gate, when the tail gate lifting oil cylinder controls the tail gate to be closed, the tail gate lock pin oil cylinder controls the tail gate locking structure to lock the tail gate, and the tail gate is controlled to be locked in such a way by a tail gate hydraulic control system of the garbage compression vehicle described in the Chinese utility model patent with the authorization publication number of CN 207064357U; the second is to control the locking of the tail gate through the tail gate lifting oil cylinder, the tail gate locking structure is connected with the piston rod of the tail gate lifting oil cylinder, the opening of the tail gate locking structure is realized through controlling the lifting of the piston rod of the tail gate lifting oil cylinder, the locking of the tail gate locking structure is realized by controlling the piston rod of the tail gate lifting oil cylinder to descend to the bottom, and the locking of the tail gate is controlled through the mode if the garbage compression vehicle tail gate hydraulic control system described in the patent of the Chinese utility model with the authorization publication number of CN 207061026U.
Foretell tail gate lockpin hydro-cylinder and tail gate lift hydro-cylinder all can control the locking of tail gate as tail gate locking hydro-cylinder, but, when carrying out rubbish compression, rubbish can produce very big outside thrust to the tail gate, and this can make the oil of the corresponding oil intracavity in the tail gate locking hydro-cylinder discharged, leads to the tail gate locking hydro-cylinder to kick-back, and then leads to the tail gate abnormal opening, can influence the normal operation of rubbish compression car like this.
In order to solve the problem of abnormal opening of the tailgate, the method of setting the check valve or the hydraulic lock in the locking oil path is adopted in the above chinese utility model patent with the authorization notice number of CN207064357U and the authorization notice number of CN207061026U, thereby avoiding the oil in the corresponding oil chamber in the locking oil cylinder from being discharged, and further avoiding the abnormal opening of the tailgate.
Although the oil in the corresponding oil cavity in the tail gate locking oil cylinder can be avoided being discharged to a certain extent by the method for setting the hydraulic lock or the check valve in the locking oil path, the compressed garbage can be continuously transmitted to the thrust of the tail gate, and then the oil in the corresponding oil cavity in the tail gate locking oil cylinder can be continuously extruded, and the continuously extruded oil can continuously act on the hydraulic lock or the check valve.
Disclosure of Invention
The invention aims to provide a hydraulic control system of a garbage compression truck, which is used for solving the technical problem that the pressure of a tail gate locking oil cylinder is insufficient due to the fact that a locking oil path of the tail gate locking oil cylinder is partially leaked due to long-time operation in the prior art; meanwhile, the invention also provides a garbage compression truck using the hydraulic control system, which is used for solving the problem that the garbage compression truck in the prior art cannot normally operate due to abnormal opening of the tail door.
In order to achieve the purpose, the hydraulic control system of the garbage compression truck adopts the following technical scheme: the hydraulic control system of the garbage compression truck comprises a push shovel oil cylinder used for driving a push shovel of the garbage compression truck to move in a reciprocating mode, a tail gate locking oil cylinder used for locking a tail gate of the garbage compression truck, and a hydraulic oil circuit used for controlling the push shovel oil cylinder and the tail gate locking oil cylinder to move.
The hydraulic control system of the garbage compression truck has the beneficial effects that: the compression oil circuit is used for supplying oil to a corresponding cavity of the push shovel oil cylinder so that the push shovel oil cylinder controls the push shovel to compress garbage, the locking oil circuit is used for supplying oil to a corresponding cavity of the tail gate locking oil cylinder so that the tail gate locking oil cylinder controls the locking of the tail gate, hydraulic oil in the compression oil circuit and the locking oil circuit has certain pressure and presses the corresponding oil cylinder, a linkage oil circuit is arranged between the compression oil circuit and the locking oil circuit, the linkage oil circuit is conducted when the compression oil circuit supplies oil, after the linkage oil circuit is conducted, high-pressure oil in the compression oil circuit continuously enters the locking oil circuit through the linkage oil circuit to lock the tail gate, even if part of the locking oil circuit leaks, the hydraulic oil pressure acting on the tail gate can be effectively ensured because high-pressure oil in the compression oil circuit is continuously supplemented, the reliable locking of the tail gate is ensured, and abnormal opening of the tail gate is avoided, therefore, the garbage compression truck using the hydraulic control system can work normally.
Furthermore, the control valve is a one-way valve which can control the hydraulic oil to flow from the compression oil way to the locking oil way in a one-way mode. The hydraulic oil can only flow to the one-way valve of the locking oil way from the compression oil way, so that when the tail gate is required to be locked without compressing garbage, the hydraulic oil in the locking oil way cannot enter the compression oil way through the chain oil way, and the push shovel oil cylinder is prevented from generating abnormal actions.
Furthermore, the hydraulic control system of the garbage compression truck comprises an oil supply oil path and an oil return oil path, wherein the hydraulic oil path comprises a retreating oil path and a push shovel oil cylinder control valve, the retreating oil path is used for supplying oil to a corresponding cavity of the push shovel oil cylinder to control the push shovel oil cylinder to retreat, the push shovel oil cylinder control valve is provided with a first station and a second station, the first station is used for enabling the oil supply oil path to be communicated with the compression oil path and enabling the oil return oil path to be communicated with the retreating oil path, the second station is used for enabling the oil return oil path to be communicated with the compression oil path and enabling the oil supply oil path to be communicated with the retreating oil path, and a pressure relay is arranged on the compression oil path and controls the push. The control valve of the push shovel oil cylinder is provided with a first station and a second station, and the extending and retracting actions of the push shovel oil cylinder can be controlled by only one control valve of the push shovel oil cylinder, so that the complexity of the hydraulic control system is reduced; in addition, the pressure relay can monitor when the control valve of the push shovel oil cylinder is operated to control the telescopic action of the push shovel oil cylinder, so that the automation degree of the hydraulic control system is improved, and the safety performance of the hydraulic control system can be improved.
Furthermore, the tail gate locking oil cylinder is a tail gate oil cylinder, the tail gate oil cylinder has an opening state for lifting the tail gate to be opened and a locking state for closing the tail gate and locking the tail gate, the hydraulic oil circuit comprises a lifting oil circuit for supplying oil to a corresponding cavity of the tail gate oil cylinder to control the tail gate oil cylinder to lift and open the tail gate, and a hydraulic lock is arranged between the lifting oil circuit and the locking oil circuit. The opening and closing of the tail gate and the locking function of the tail gate are integrated in one oil cylinder, so that the complexity of the hydraulic control system is reduced; the hydraulic lock is arranged between the lifting oil way and the locking oil way, so that hydraulic oil in a corresponding cavity of the tail gate oil cylinder can be prevented from flowing backwards after the tail gate is locked, and the locking stability of the tail gate can be further enhanced.
The garbage compression truck adopts the following technical scheme: the garbage compression truck comprises a compression box, a push shovel is arranged in the compression box, a tail door capable of being opened and closed is arranged at the tail part of the compression box, the garbage compression truck also comprises a hydraulic control system, the hydraulic control system comprises a push shovel oil cylinder for controlling the push shovel to move in a reciprocating manner, the tail gate locking oil cylinder of the locking tail gate and the hydraulic oil circuit for controlling the push shovel oil cylinder and the tail gate locking oil cylinder to act, the hydraulic oil circuit comprises a compression oil circuit communicated with a corresponding cavity of the push shovel oil cylinder, the compression oil circuit supplies oil to the corresponding cavity of the push shovel oil cylinder to drive the push shovel oil cylinder to move and compress garbage, the hydraulic oil circuit further comprises a locking oil circuit communicated with the corresponding cavity of the tail gate locking oil cylinder, the locking oil circuit supplies oil to the corresponding cavity of the tail gate locking oil cylinder to drive the tail gate locking oil cylinder to lock the tail gate, a linkage oil circuit is arranged between the compression oil circuit and the locking oil circuit, a control valve is arranged on the linkage oil circuit, and the control valve controls the linkage oil circuit to be communicated when the compression oil circuit supplies oil to the corresponding cavity of.
The garbage compression truck has the beneficial effects that: the compression oil circuit in the hydraulic control system of the garbage compression vehicle is used for supplying oil to the corresponding cavity of the push shovel oil cylinder so that the push shovel oil cylinder controls the push shovel to compress garbage, the locking oil circuit is used for supplying oil to the corresponding cavity of the tail gate locking oil cylinder so that the tail gate locking oil cylinder controls the locking of the tail gate, hydraulic oil in the compression oil circuit and the locking oil circuit has certain pressure and presses the corresponding oil cylinder, a linkage oil circuit is arranged between the compression oil circuit and the locking oil circuit and is communicated when the compression oil circuit supplies oil, and after the linkage oil circuit is communicated, high-pressure oil in the compression oil circuit can continuously enter the locking oil circuit through the linkage oil circuit to lock the tail gate, at the moment, even if the locking oil circuit is partially leaked, because a high-pressure oil source in the compression oil circuit is continuously supplemented, the hydraulic oil pressure acting on the tail gate can be effectively ensured, the reliable locking of the tail gate is ensured, and the abnormal opening of the tail gate can not occur, so that the normal operation of the garbage compression truck can be ensured.
Furthermore, the control valve is a one-way valve which can control the hydraulic oil to flow from the compression oil way to the locking oil way in a one-way mode. The hydraulic oil can only flow to the one-way valve of the locking oil way from the compression oil way, so that when the tail gate is required to be locked without compressing garbage, the hydraulic oil in the locking oil way cannot enter the compression oil way through the chain oil way, and the push shovel oil cylinder is prevented from generating abnormal actions.
Furthermore, the hydraulic control system of the garbage compression truck comprises an oil supply oil path and an oil return oil path, wherein the hydraulic oil path comprises a retreating oil path and a push shovel oil cylinder control valve, the retreating oil path is used for supplying oil to a corresponding cavity of the push shovel oil cylinder to control the push shovel oil cylinder to retreat, the push shovel oil cylinder control valve is provided with a first station and a second station, the first station is used for enabling the oil supply oil path to be communicated with the compression oil path and enabling the oil return oil path to be communicated with the retreating oil path, the second station is used for enabling the oil return oil path to be communicated with the compression oil path and enabling the oil supply oil path to be communicated with the retreating oil path, and a pressure relay is arranged on the compression oil path and controls the push. The control valve of the push shovel oil cylinder is provided with a first station and a second station, and the extending and retracting actions of the push shovel oil cylinder can be controlled by only one control valve of the push shovel oil cylinder, so that the complexity of the hydraulic control system is reduced; in addition, the pressure relay can monitor when the control valve of the push shovel oil cylinder is operated to control the telescopic action of the push shovel oil cylinder, so that the automation degree of the hydraulic control system is improved, and the safety performance of the hydraulic control system can be improved.
Furthermore, the tail gate locking oil cylinder is a tail gate oil cylinder, the tail gate oil cylinder has an opening state for lifting the tail gate to be opened and a locking state for closing the tail gate and locking the tail gate, the hydraulic oil circuit comprises a lifting oil circuit for supplying oil to a corresponding cavity of the tail gate oil cylinder to control the tail gate oil cylinder to lift and open the tail gate, and a hydraulic lock is arranged between the lifting oil circuit and the locking oil circuit. The opening and closing of the tail gate and the locking function of the tail gate are integrated in one oil cylinder, so that the complexity of the hydraulic control system is reduced; the hydraulic lock is arranged between the lifting oil way and the locking oil way, so that hydraulic oil in a corresponding cavity of the tail gate oil cylinder can be prevented from flowing backwards after the tail gate is locked, and the locking stability of the tail gate can be further enhanced.
Drawings
Fig. 1 is a schematic diagram of a hydraulic control system of an embodiment of the garbage compression truck according to the present invention.
In the drawings: 1-oil tank, 2-oil inlet filter, 3-oil pump, 4-motor, 5-pressure gauge, 6-pressure reducing valve, 7-overflow valve, 8-push shovel cylinder control valve, 9-tail gate cylinder control valve, 10-lift cylinder control valve, 11-pressure relay, 12-push shovel cylinder, 13-tail gate cylinder, 14-lift cylinder, 15-one-way valve, 16-tail gate oil way hydraulic lock, 17-oil return filter, 18-oil supply oil way, 19-hydraulic valve group, 20-oil return oil way, 21-compression oil way, 22-retreat oil way, 23-oil way lock, 24-lift oil way, 25-interlocking oil way.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
The embodiment of the garbage compression truck provided by the invention comprises the following steps:
the garbage compression truck comprises a compression box, a push shovel is arranged in the compression box, and a tail door and a lifting mechanism which can be opened and closed are arranged at the tail of the compression box; the garbage can comprises a garbage can, a pushing shovel, a tail door, a lifting mechanism and a compression box, wherein the pushing shovel is used for compressing garbage, the tail door stops the garbage after being closed so as to be matched with the pushing shovel to compress the garbage, the pushing shovel can apply continuous compression force to the garbage in the compression process of the garbage, the garbage can generate pushing force to the tail door, and the lifting mechanism is used for lifting the garbage can and pouring the garbage in the garbage can into the compression box; the garbage compression truck also comprises a hydraulic control system, and the compression action of the push shovel, the opening and closing of the tail door, the locking of the tail door and the action of the lifting mechanism are all controlled by the hydraulic control system.
As shown in fig. 1, the hydraulic control system includes an oil tank 1, an oil supply path 18, a hydraulic path, functional cylinders, and an oil return path 20, where the functional cylinders are specifically a push shovel cylinder 12, a tail gate cylinder 13, and a lift cylinder 14, and a hydraulic valve group 19 for controlling each functional cylinder is further disposed in the hydraulic path.
As shown in fig. 1, in the oil supply path 18, the motor 4 controls the oil pump 3 to pump oil from the oil tank 1, an oil inlet filter 2 is arranged on the oil supply path 18 between the oil pump 3 and the oil tank 1, the oil inlet filter 2 filters hydraulic oil entering the hydraulic valve bank 19, and the filtered hydraulic oil is sent into the hydraulic valve bank 19.
As shown in fig. 1, the hydraulic oil in the hydraulic valve group 19 flows into the oil tank 1 through the oil return path 20, and the oil return path 20 is provided with an oil return filter 17, and the oil return filter 17 can filter the hydraulic oil in the oil return path 20.
As shown in fig. 1, the hydraulic valve group 19 includes a push shovel cylinder control valve 8, a tail gate cylinder control valve 9 and a lift cylinder control valve 10 connected in series, the push shovel cylinder control valve 8 is connected to the push shovel cylinder 12 through a corresponding hydraulic oil path and controls the telescopic action of the push shovel cylinder 12, the tail gate cylinder control valve 9 is connected to the tail gate cylinder 13 through a corresponding hydraulic oil path and controls the telescopic action of the tail gate cylinder 13, the lift cylinder control valve 10 is connected to the lift cylinder 14 through a corresponding hydraulic oil path and controls the telescopic action of the lift cylinder 14, and the tail gate cylinder 13 constitutes a tail gate locking cylinder. In this embodiment, the blade cylinder control valve 8, the tailgate cylinder control valve 9, and the lift cylinder control valve 10 are all three-position, six-way directional valves.
As shown in fig. 1, the hydraulic oil path between the dozer cylinder control valve 8 and the dozer cylinder 12 includes a compression oil path 21 and a retreat oil path 22, the compression oil path 21 is used for supplying oil into a corresponding cavity of the dozer cylinder 12 to drive the dozer cylinder to move and compress garbage, the retreat oil path 22 is used for supplying oil into a corresponding cavity of the dozer cylinder 12 to control the dozer cylinder to retreat, the dozer cylinder control valve 8 has different stations including a dozer first station for communicating the oil supply path 18 with the compression oil path 21 and the oil return path 20 with the retreat oil path 22, a second position of the push shovel for communicating the oil return path 20 with the compression path 21 and communicating the oil supply path 18 with the retreating path 22, and a push shovel middle position for unloading, wherein the push shovel middle position is used for compressing garbage and retreating to a set position by the push shovel, the first position of the push shovel forms a first position, and the second position of the push shovel forms a second position. When the garbage in the compression box needs to be compressed, the push shovel oil cylinder control valve 8 is adjusted to a first push shovel station, when the push shovel oil cylinder 12 needs to return, the push shovel oil cylinder control valve 8 is adjusted to a second push shovel station, the garbage compression is completed by the push shovel and the push shovel oil cylinder control valve 8 returns to a set position, and the push shovel oil cylinder control valve 8 returns to a push shovel middle position.
As shown in fig. 1, a pressure relay 11 is further disposed on the compression oil path 21, and when the hydraulic oil in the compression oil path 21 rises to a set value, the pressure relay 11 controls the dozer cylinder control valve 8 to switch from the dozer first station to the dozer second station, so that the stability of the hydraulic control system can be improved.
As shown in fig. 1, the hydraulic oil path between the tailgate cylinder control valve 9 and the tailgate cylinder 13 includes a lock oil path 23 and a lift oil path 24, the lift oil path 24 is used for supplying oil to a corresponding cavity of the tailgate cylinder 13 to drive the tailgate cylinder 13 to open the tailgate, the lock oil path 23 is used for supplying oil to a corresponding cavity of the tailgate cylinder 13 to drive the tailgate cylinder 13 to close the tailgate and control the tailgate locking structure to lock the tailgate, the tailgate cylinder control valve 9 has different stations, including a tailgate first station for communicating the oil supply path 18 with the lift oil path 24 and communicating the oil return path 20 with the lock oil path 23, a tailgate second station for communicating the oil return path 20 with the lift oil path 24 and communicating the oil supply path 18 with the lock oil path 23, and a tailgate middle station for performing unloading operation. When the tail gate needs to be opened, the tail gate oil cylinder control valve 9 is adjusted to a first station of the tail gate, the oil supply oil way 18 supplies oil to the lifting oil way 24, and finally the tail gate oil cylinder 13 controls the tail gate to be opened, and at the moment, the tail gate oil cylinder 13 is in an opening state; when the tail gate needs to be closed and locked, the tail gate oil cylinder control valve 9 is adjusted to a second station of the tail gate, the oil supply oil way 18 supplies oil to the locking oil way 23, finally the tail gate oil cylinder 13 controls the tail gate to be closed and locked, and at the moment, the tail gate oil cylinder 13 is in a locking state.
As shown in fig. 1, a tailgate oil path hydraulic lock 16 is further disposed between the lift oil path 24 and the lock oil path 23, and the tailgate oil path hydraulic lock 16 is a double-hydraulic control one-way valve, which can ensure that hydraulic oil in the lift oil path 24 and the lock oil path 23 does not flow to the tailgate cylinder control valve 9 when the tailgate is in a closed and locked state, thereby ensuring that locking of the tailgate does not loosen.
Correspondingly, when the tail gate oil cylinder control valve 9 is in the middle position of the tail gate, unloading operation is achieved, a lifting working port used for being connected with a lifting oil circuit and a locking working port used for being connected with a locking oil circuit on the tail gate oil cylinder control valve are communicated with the corresponding oil return circuit 20, a corresponding control side of a hydraulic lock is free from hydraulic acting force, the work of the tail gate oil circuit hydraulic lock 16 is effectively guaranteed, and then the tail gate is effectively locked by the tail gate oil cylinder 13.
As shown in fig. 1, an interlock oil passage 25 is provided between the compression oil passage 21 and the lock-up oil passage 23, the one-way valve 15 is arranged on the interlocking oil path 25, the one-way valve 15 forms a control valve in the interlocking oil path 25, the one-way valve 15 ensures that hydraulic oil can only flow from the compression oil path 21 to the locking oil path 23, the one-way valve 15 is opened when the compression oil path 21 supplies oil to the shovel oil cylinder 12, thereby, the interlocking oil path 25 is conducted, and after the interlocking oil path 25 is conducted, the high-pressure oil in the compression oil path 21 continuously enters the locking oil path 23 through the interlocking oil path 25 to lock the tailgate, and at this time, even if the lock-up oil passage 23 is partially leaked, since the high-pressure oil in the compression oil passage 21 is constantly replenished, the hydraulic oil pressure acting on the tail gate can be effectively guaranteed, the tail gate is guaranteed to be reliably locked, the tail gate cannot be opened abnormally, and therefore the garbage compression truck can be guaranteed to operate normally.
As shown in fig. 1, a hydraulic oil circuit is also connected between the lift cylinder control valve 10 and the lift cylinder 14, and the lift cylinder control valve 10 controls the telescopic action of the lift cylinder 14, so as to control the lifting mechanism to complete the lifting of the trash can and the dumping of the trash.
As shown in fig. 1, a pressure gauge 5 is installed in the hydraulic valve group 19, and the pressure gauge 5 is used for measuring pressure values of the hydraulic oil circuit when the hydraulic control system is in different working states; an overflow valve 7 is also arranged in the hydraulic valve group 19, and the overflow valve 7 plays a role in protecting the whole hydraulic control system; a pressure reducing valve 6 is also installed in the hydraulic valve bank 19, and the pressure reducing valve 6 is used for reducing pressure when the pressure of the hydraulic control system is too high.
When the garbage compression vehicle needs to compress garbage, firstly, a tail gate needs to be closed, specifically, a tail gate oil cylinder control valve 9 is adjusted to a second station of the tail gate, at the moment, an oil supply oil way 18 is communicated with a locking oil way 23, an oil return oil way 20 is communicated with a lifting oil way 24, a tail gate oil cylinder 13 controls the tail gate to be gradually closed and finally locks the tail gate, and then the tail gate oil cylinder control valve 9 is adjusted to a middle position of the tail gate; after the tail gate is locked, the control valve 8 of the push shovel oil cylinder is adjusted to a first position of the push shovel, at the moment, the oil supply oil way 18 is communicated with the compression oil way 21, the oil return oil way 20 is communicated with the retreating oil way 22, and the push shovel oil cylinder 12 controls the push shovel to compress garbage; when the control valve 8 of the push shovel oil cylinder is adjusted to a first working position of the push shovel, the one-way valve 15 in the linkage oil way 25 is opened, the compression oil way 21 is communicated with the locking oil way 23, high-pressure oil in the compression oil way 21 continuously enters the locking oil way 23 through the linkage oil way 25 to lock the tail gate, and at the moment, even if part of the locking oil way 23 leaks, the high-pressure oil in the compression oil way 21 is continuously supplemented, so that the hydraulic oil pressure acting on the tail gate can be effectively ensured, and the tail gate is ensured to be reliably locked; finally, when the garbage is compressed to a certain degree, a pressure relay 11 arranged in a compression oil path 21 sends an electric signal to enable a push shovel oil cylinder control valve 8 to be adjusted to a second push shovel station, at the moment, an oil supply oil path 18 is communicated with a retreating oil path 22, an oil return oil path 20 is communicated with the compression oil path 21, and a push shovel oil cylinder 12 gradually retreats and controls a push shovel to retreat; when the push shovel finishes garbage compression and retreats to a designated position, the control valve 8 of the push shovel oil cylinder is adjusted to the middle position of the push shovel.
In the above embodiment, the function of the tail gate locking oil cylinder is realized through the tail gate oil cylinder, and the tail gate oil cylinder controls the opening and closing of the tail gate and the locking of the tail gate at the same time. In other embodiments, a special tail gate locking oil cylinder can be arranged for locking the tail gate, and the tail gate oil cylinder is only used for controlling the opening and closing of the tail gate.
In the above embodiment, the interlock oil passage is provided with the check valve to communicate the compression oil passage with the lock oil passage. In other embodiments, the one-way valve can be replaced by other control valves as long as the linkage oil path conduction can be realized when the push shovel oil cylinder controls the push shovel to compress the garbage.
In the above embodiment, the shovel cylinder control valve, the tailgate cylinder control valve, and the lift cylinder control valve are all three-position six-way reversing valves. In other embodiments, other control valves, such as a three-dimensional five-way valve, may be used for the dozer cylinder control valve, the tailgate cylinder control valve, and the lift cylinder control valve.
The invention also provides a hydraulic control system of the garbage compression truck, and the composition of the hydraulic control system of the garbage compression truck is the same as that of the hydraulic control system of the garbage compression truck in the garbage compression truck, so the details are not repeated.
Claims (8)
1. A hydraulic control system of a garbage compression truck comprises a push shovel oil cylinder for driving a push shovel of the garbage compression truck to reciprocate, a tail gate locking oil cylinder for locking a tail gate of the garbage compression truck, and a hydraulic oil path for controlling the push shovel oil cylinder and the tail gate locking oil cylinder to act, wherein the hydraulic oil path comprises a compression oil path communicated with a corresponding cavity of the push shovel oil cylinder, the compression oil circuit supplies oil to the corresponding cavity of the push shovel oil cylinder to drive the push shovel oil cylinder to move to compress garbage, the hydraulic oil circuit also comprises a locking oil circuit communicated with the corresponding cavity of the tail gate locking oil cylinder, the locking oil path supplies oil to a corresponding cavity of the tail gate locking oil cylinder to drive the tail gate locking oil cylinder to lock the tail gate, it is characterized in that a linkage oil way is arranged between the compression oil way and the locking oil way, a control valve is arranged on the linkage oil way, and the control valve controls the conduction of the interlocking oil circuit when the compressed oil circuit supplies oil to the corresponding cavity of the push shovel oil cylinder.
2. The hydraulic control system of a garbage compression truck as claimed in claim 1, wherein the control valve is a check valve capable of controlling one-way flow of hydraulic oil from the compression oil path to the locking oil path.
3. The hydraulic control system of a garbage compression truck according to claim 1 or 2, wherein the hydraulic control system of the garbage compression truck comprises an oil supply path and an oil return path, the hydraulic oil path comprises a retreat oil path for supplying oil to a corresponding cavity of the push shovel oil cylinder to control the backward movement of the push shovel oil cylinder and a push shovel oil cylinder control valve, the push shovel oil cylinder control valve has a first station for communicating the oil supply path with the compression oil path and the oil return path with the retreat oil path, and has a second station for communicating the oil return path with the compression oil path and the oil supply path with the retreat oil path, the compression oil path is provided with a pressure relay, and the pressure relay controls the push shovel oil cylinder control valve to be switched from the first station to the second station when the hydraulic oil in the compression oil path rises to a set value.
4. The hydraulic control system of the garbage compression truck as claimed in claim 1 or 2, wherein the tailgate lock cylinder is a tailgate cylinder, the tailgate cylinder has an open state for lifting the tailgate open and a closed state for closing the tailgate and locking the tailgate, the hydraulic circuit includes a lifting circuit for supplying oil to a corresponding cavity of the tailgate cylinder to control the tailgate cylinder to lift and open the tailgate, and a hydraulic lock is provided between the lifting circuit and the lock circuit.
5. A garbage compression vehicle comprises a compression box, a push shovel is arranged in the compression box, a tail door capable of being opened and closed is arranged at the tail of the compression box, the garbage compression vehicle further comprises a hydraulic control system, the hydraulic control system comprises a push shovel oil cylinder for controlling the push shovel to move in a reciprocating mode, a tail door locking oil cylinder for locking the tail door, and a hydraulic oil circuit for controlling the push shovel oil cylinder and the tail door locking oil cylinder to move, the hydraulic oil circuit comprises a compression oil circuit communicated with a corresponding cavity of the push shovel oil cylinder, the compression oil circuit supplies oil to the corresponding cavity of the push shovel oil cylinder to drive the push shovel oil cylinder to move and compress garbage, the hydraulic oil circuit further comprises a locking oil circuit communicated with the corresponding cavity of the tail door locking oil cylinder, the locking oil circuit supplies oil to the corresponding cavity of the tail door locking oil cylinder to drive the tail door to lock the tail door of the tail door locking oil cylinder, and is characterized in that a linkage oil circuit is arranged between, and the control valve controls the conduction of the interlocking oil circuit when the compressed oil circuit supplies oil to the corresponding cavity of the push shovel oil cylinder.
6. The garbage compression truck as defined in claim 5, wherein the control valve is a check valve capable of controlling the hydraulic oil to flow from the compression oil path to the locking oil path in a one-way manner.
7. The garbage compression truck as claimed in claim 5 or 6, wherein the hydraulic control system comprises an oil supply path and an oil return path, the hydraulic oil path comprises a retreat oil path for supplying oil to a corresponding cavity of the push shovel cylinder to control the push shovel cylinder to retreat and a push shovel cylinder control valve, the push shovel cylinder control valve has a first station for communicating the oil supply path with the compression oil path and the oil return path with the retreat oil path, and has a second station for communicating the oil return path with the compression oil path and the oil supply path with the retreat oil path, the compression oil path is provided with a pressure relay, and the pressure relay controls the push shovel cylinder control valve to switch from the first station to the second station when hydraulic oil in the compression oil path rises to a set value.
8. The garbage compression truck as claimed in claim 5 or 6, wherein the tailgate lock cylinder is a tailgate cylinder, the tailgate cylinder has an open state for lifting the tailgate open and a closed state for closing the tailgate and locking the tailgate, the hydraulic circuit includes a lifting circuit for supplying oil to a corresponding cavity of the tailgate cylinder to control the tailgate cylinder to lift and open the tailgate, and a hydraulic lock is provided between the lifting circuit and the lock circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910005879.1A CN111392294A (en) | 2019-01-03 | 2019-01-03 | Garbage compression truck and hydraulic control system thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910005879.1A CN111392294A (en) | 2019-01-03 | 2019-01-03 | Garbage compression truck and hydraulic control system thereof |
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| Publication Number | Publication Date |
|---|---|
| CN111392294A true CN111392294A (en) | 2020-07-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910005879.1A Pending CN111392294A (en) | 2019-01-03 | 2019-01-03 | Garbage compression truck and hydraulic control system thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113027849A (en) * | 2021-01-27 | 2021-06-25 | 长沙中联重科环境产业有限公司 | Discharging hydraulic system of compression type garbage truck, control method of discharging hydraulic system and compression type garbage truck |
-
2019
- 2019-01-03 CN CN201910005879.1A patent/CN111392294A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113027849A (en) * | 2021-01-27 | 2021-06-25 | 长沙中联重科环境产业有限公司 | Discharging hydraulic system of compression type garbage truck, control method of discharging hydraulic system and compression type garbage truck |
| CN113027849B (en) * | 2021-01-27 | 2023-10-03 | 长沙中联重科环境产业有限公司 | Compression type garbage truck discharging hydraulic system, control method thereof and compression type garbage truck |
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