A garbage compression truck and a scraping slide plate linkage system thereof

Abstract

The application discloses a garbage compression vehicle and a scraping slide plate linkage system thereof, and belongs to the technical field of garbage compression vehicles. The system comprises a scraping plate oil cylinder, a slide plate oil cylinder, a three-position four-way electromagnetic valve, a three-position four-way hydraulic control valve and a differential pressure control device. Two working ports of the three-position four-way electromagnetic valve are communicated with two working ports of the scraping plate oil cylinder. Two working ports of the three-position four-way hydraulic control valve are communicated with two working ports of the slide plate oil cylinder. An oil taking port of the differential pressure control device is communicated with the scraping plate oil cylinder. Oil outlets of the differential pressure control device are connected with two control ports of the three-position four-way hydraulic control valve. The differential pressure control device is used for outputting control oil to control the three-position four-way hydraulic control valve to act when the scraping plate oil cylinder is completely extended or retracted. The linkage system uses the differential pressure output control oil of the rod cavity and the rodless cavity when the scraping plate oil cylinder is completely extended or retracted to control the three-position four-way hydraulic control valve, so that the phenomenon that the state detection device of the scraping plate oil cylinder is covered by garbage and dirt due to a dirty working environment and is caused to fail can be completely avoided, and the stability of the scraping slide mechanism is improved.

Description

Technical Field

[0001] This invention relates to the field of waste treatment equipment technology, and in particular to a waste compactor truck and its scraper linkage system. Background Technology

[0002] The existing garbage compactor truck's scraper linkage is achieved by a position sensor (proximity switch) sensing the sensing block and sending a control signal, such as... Figure 1 As shown, the slide plate 01 is hinged to the scraper 02, the piston rod of the scraper cylinder 03 is hinged to the slide plate 01, and the cylinder of the scraper cylinder 03 is hinged to the scraper 02. The scraper 02 can rotate around the slide plate 01 under the drive of the scraper cylinder 03. A sensor 05 is installed on the slide plate 01, and sensor sensing plates 06 are installed at both ends of the cylinder of the scraper cylinder 03. The slide plate cylinder 04 can only extend when the sensor 05 senses the sensing plate 06, and the slide plate cylinder 04 can only retract when the sensor 05 senses the sensing plate 06. It can be seen that the sensor and its sensing plate in the scraper-slide linkage system are installed on the scraper-slide mechanism. The main function of the scraper-slide mechanism is to fill and compress garbage in the hopper of the garbage compactor. The working environment is very dirty and messy, and the sensor is easily covered by garbage and fails, which leads to abnormal operation of the scraper-slide mechanism and seriously affects the efficiency of garbage collection and transportation. Summary of the Invention

[0003] In view of this, the first objective of the present invention is to provide a scraper linkage system for a garbage compactor truck, so as to prevent the sensor used to detect the working status of the scraper cylinder from being covered by garbage and becoming ineffective, thereby improving its reliability in dirty and messy environments and ensuring the normal operation of garbage collection and transportation.

[0004] The second objective of this invention is to provide a garbage compactor truck based on the above-mentioned garbage compactor truck scraper linkage system.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A scraper-plate linkage system for a garbage compactor includes a scraper cylinder, a plate cylinder, a three-position four-way solenoid valve, a three-position four-way hydraulic control valve, and a differential pressure control device. The two working ports of the three-position four-way solenoid valve are respectively connected to the two working ports of the scraper cylinder. The two working ports of the three-position four-way hydraulic control valve are respectively connected to the two working ports of the plate cylinder. The oil inlet of the differential pressure control device is connected to the scraper cylinder, and the oil outlet of the differential pressure control device is respectively connected to the two control ports of the three-position four-way hydraulic control valve. The differential pressure control device outputs control oil to control the three-position four-way hydraulic control valve to switch from the middle position to the left or right position when the scraper cylinder is in a fully extended or fully retracted state.

[0007] Preferably, the differential pressure control device comprises two differential pressure signaling modules, each of which comprises a spool valve and a check valve, the spool valve and the check valve are connected in series between two working ports of the differential pressure signaling module as the oil inlet port of the differential pressure control device, the check valve is located on the side of the working chamber of the spool valve away from the control chamber of the spool valve, and the check valve is used for one-way conduction from the blade oil cylinder to the spool valve, the oil outlet of the working chamber of the spool valve of each of the two differential pressure signaling modules is connected with the two control ports of the three-position four-way hydraulic control valve as the oil outlet of the differential pressure control device, the two working ports of one of the two differential pressure signaling modules are respectively communicated with the rod cavity and the rodless cavity of the blade oil cylinder when the blade oil cylinder is in the fully extended state, and the two working ports of the other of the two differential pressure signaling modules are respectively communicated with the rod cavity and the rodless cavity of the blade oil cylinder when the blade oil cylinder is in the fully retracted state.

[0008] Preferably, the differential pressure signaling module further comprises a throttling element connected in parallel at both ends of the spool valve.

[0009] Preferably, the differential pressure control device comprises a two-position four-way hydraulic control valve, a shuttle valve, and two differential pressure signaling modules, each of which comprises a spool valve and a check valve, the spool valve and the check valve are connected in series between two working ports of the differential pressure signaling module as the oil inlet port of the differential pressure control device, the check valve is located on the side of the working chamber of the spool valve away from the control chamber of the spool valve, and the check valve is used for one-way conduction from the blade oil cylinder to the spool valve, the oil outlet of the working chamber of the spool valve of each of the two differential pressure signaling modules is connected with the two control ports of the two-position four-way hydraulic control valve as the oil outlet of the differential pressure control device, the two working ports of one of the two differential pressure signaling modules are respectively communicated with the rod cavity and the rodless cavity of the blade oil cylinder when the blade oil cylinder is in the fully extended state, and the two working ports of the other of the two differential pressure signaling modules are respectively communicated with the rod cavity and the rodless cavity of the blade oil cylinder when the blade oil cylinder is in the fully retracted state, two inlets of the shuttle valve are connected with two working ports of the three-position four-way electromagnetic valve, an outlet of the shuttle valve is connected with an inlet of the two-position four-way hydraulic control valve, and two working ports of the two-position four-way hydraulic control valve are connected with two control ports of the three-position four-way hydraulic control valve as the oil outlet of the differential pressure control device.

[0010] Preferably, the differential pressure signaling module further comprises a throttling element connected in parallel at both ends of the spool valve.

[0011] Preferably, a hydraulic control check valve is further included, an inlet and an outlet of the hydraulic control check valve are connected in series between one working port of the three-position four-way electromagnetic valve and one working port of the blade oil cylinder, and a control port of the hydraulic control check valve is communicated with another working port of the three-position four-way electromagnetic valve.

[0012] Preferably, an instruction acquisition module for acquiring user instructions is further included, the instruction acquisition module is connected with a controller of the garbage compression truck blade linkage system, and the controller of the garbage compression truck blade linkage system controls the three-position four-way electromagnetic valve to switch from the neutral position to the left position or the right position according to the user instructions acquired by the instruction acquisition module.

[0013] A garbage compression truck includes the garbage compression truck blade linkage system according to any one of the above.

[0014] To achieve the above object, the application provides a garbage compression truck scraping and sliding plate linkage system, which comprises a scraping plate oil cylinder, a sliding plate oil cylinder, a three-position four-way electromagnetic valve, a three-position four-way hydraulic control valve and a differential pressure control device, wherein two working ports of the three-position four-way electromagnetic valve are communicated with two working ports of the scraping plate oil cylinder respectively, two working ports of the three-position four-way hydraulic control valve are communicated with two working ports of the sliding plate oil cylinder respectively, an oil taking port of the differential pressure control device is communicated with the scraping plate oil cylinder, and oil outlets of the differential pressure control device are connected with two control ports of the three-position four-way hydraulic control valve respectively, and the differential pressure control device is used for outputting control oil to control the three-position four-way hydraulic control valve to switch from the middle position to the left position or the right position when the scraping plate oil cylinder is in the fully extended state or the fully retracted state; during garbage compression filling operation, first, the right electromagnetic iron DT2 of the three-position four-way electromagnetic valve is powered, the three-position four-way electromagnetic valve is in the right working position, the three-position four-way hydraulic control valve is in the middle position (initial state) or the left working position (end of the last cycle), the sliding plate oil cylinder is not moved due to pressure accumulation, the rod cavity of the scraping plate oil cylinder is connected with the oil pump through the three-position four-way electromagnetic valve, the rodless cavity of the scraping plate oil cylinder is communicated with the oil tank through the three-position four-way electromagnetic valve, the scraping plate oil cylinder is retracted, when the scraping plate oil cylinder is fully retracted, the pressure in the rod cavity of the scraping plate oil cylinder is higher than the pressure in the rodless cavity, at this time, the hydraulic oil in the scraping plate oil cylinder is output to the right control port of the three-position four-way hydraulic control valve through the pressure control device, the three-position four-way hydraulic control valve switches to the right working position, the rod cavity of the sliding plate oil cylinder is communicated with the oil pump through the three-position four-way hydraulic control valve, the rodless cavity of the sliding plate oil cylinder is communicated with the oil tank through the three-position four-way hydraulic control valve, and the sliding plate oil cylinder starts to retract, thereby completing the opening of the scraping plate and the downward movement of the sliding plate; then, the right electromagnetic iron DT1 of the three-position four-way electromagnetic valve is powered, the three-position four-way electromagnetic valve switches to the left working position, the rodless cavity of the scraping plate oil cylinder is connected with the oil pump through the three-position four-way electromagnetic valve, the rod cavity of the scraping plate oil cylinder is communicated with the oil tank through the three-position four-way electromagnetic valve, the scraping plate oil cylinder is extended, when the scraping plate oil cylinder is fully extended, the pressure in the rodless cavity of the scraping plate oil cylinder is higher than the pressure in the rod cavity, at this time, the hydraulic oil in the scraping plate oil cylinder is output to the left control port of the three-position four-way hydraulic control valve through the pressure control device, the three-position four-way hydraulic control valve switches to the left working position, the rodless cavity of the sliding plate oil cylinder is communicated with the oil pump through the three-position four-way hydraulic control valve, and the rod cavity of the sliding plate oil cylinder is communicated with the oil tank through the three-position four-way hydraulic control valve, thereby starting the extension of the sliding plate oil cylinder, completing the scraping of the scraping plate and the upward movement of the sliding plate, and realizing the scraping and compression of garbage; it can be seen that the scraping and sliding plate linkage system uses the differential pressure output control oil of the rod cavity and the rodless cavity of the scraping plate oil cylinder when the scraping plate oil cylinder is fully extended or fully retracted to control the three-position four-way hydraulic control valve connected with the sliding plate oil cylinder, compared with the structure of the sensor and the sensing plate of the existing scraping and sliding plate linkage system, the scraping and sliding plate linkage system can completely avoid the phenomenon that the scraping plate oil cylinder state detection device is covered by garbage and dirt due to dirty working environment and fails, and improve the stability of the scraping and sliding mechanism.

[0015] The application further provides a garbage compression vehicle comprising the garbage compression vehicle scraping slide plate linkage system as described above, and the garbage compression vehicle scraping slide plate linkage system has the technical effects as described above, so the garbage compression vehicle adopting the garbage compression vehicle scraping slide plate linkage system also has the technical effects as described above, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only show some embodiments of the application, and for those skilled in the art, other drawings can also be obtained from these drawings without any creative effort.

[0017] Figure 1 FIG. 1 is a structural schematic diagram of a garbage compression vehicle scraping slide plate linkage system in the prior art;

[0018] Figure 2 FIG. 2 is a schematic diagram of a garbage compression vehicle filling process;

[0019] Figure 3 FIG. 3 is a structural schematic diagram of a garbage compression vehicle scraping slide plate linkage system provided by an embodiment of the application;

[0020] Figure 4 FIG. 4 is a structural schematic diagram of a differential pressure signaling module of the garbage compression vehicle scraping slide plate linkage system provided by the embodiment of the application;

[0021] Figure 5 FIG. 5 is a partial schematic diagram of the differential pressure signaling module and the scraping plate oil cylinder of the garbage compression vehicle scraping slide plate linkage system provided by the embodiment of the application;

[0022] Figure 6 FIG. 6 is a working state diagram of the scraping plate oil cylinder of the garbage compression vehicle scraping slide plate linkage system provided by the embodiment of the application.

[0023] Figure 1 In the drawings:

[0024] 01 is a slide plate; 02 is a scraping plate; 03 is a scraping plate oil cylinder; 04 is a slide plate oil cylinder; 05 is a sensor; 06 is a sensing plate;

[0025] Figures 2-6 In the drawings:

[0026] 1 is a slide plate; 2 is a scraping plate; 3 is a scraping plate oil cylinder; 4 is a slide plate oil cylinder; 5 is a three-position four-way electromagnetic valve; 6 is a three-position four-way hydraulic control valve; 7 and 8 are differential pressure signaling modules; 9 is a hydraulic control check valve; 10 is a shuttle valve; 11 is a two-position four-way hydraulic control valve; 12 is a cartridge valve; 13 is a throttling element; and 14 is a check valve. DETAILED DESCRIPTION

[0027] One of the core aspects of this invention is to provide a scraper linkage system for garbage compactors. The structural design of this scraper linkage system can prevent the sensors used to detect the working status of the scraper cylinder from being covered by garbage and becoming ineffective, thereby improving its reliability in dirty and messy environments and ensuring the normal operation of garbage collection and transportation.

[0028] Another core aspect of this invention is to provide a garbage compactor truck based on the aforementioned garbage compactor truck scraper linkage system.

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] This application provides a garbage compactor truck scraper linkage system and a garbage compactor truck. Before describing the technical solutions provided in this application, the relevant technologies involved in this application will be described first.

[0031] In related technologies, the scraping mechanism includes a sliding plate 1 that is slidably disposed between the hopper and the garbage bin of the garbage compactor and a scraper 2 that is hinged to the sliding plate 1. A sliding plate cylinder 4 is disposed between the sliding plate 1 and the hopper, and a scraper cylinder 3 is disposed between the scraper 2 and the sliding plate 1. The two ends of the scraper cylinder 3 are respectively hinged to the scraper 2 and the sliding plate 1.

[0032] In the initial state, such as Figure 2 As shown in Figure a, both the slide plate cylinder 4 and the scraper cylinder 3 are in the extended state, and the scraper 2 is in the folded state relative to the slide plate 1. The scraper 2 and the slide plate 1 work together to separate the hopper from the garbage bin.

[0033] After obtaining the garbage compression command, such as Figure 2 As shown in Figure b, scraper cylinder 3 retracts, and scraper 2 opens relative to slide plate 1, preparing to insert into loose waste. Once scraper 2 is fully open relative to slide plate 1, i.e., after the detection element in the scraper-slide plate 1 linkage system issues a command, slide plate cylinder 4 retracts, slide plate 1 lowers, and scraper 2 inserts into the waste for crushing and initial compression. Figure 2 As shown in c;

[0034] Next, based on user input or detection control of the slide plate 1 and slide plate cylinder 4, the scraper cylinder 3 extends, causing the scraper 2 to rotate towards the garbage bin, further compressing the garbage. Figure 2As shown in Fig. d, when the scraper 2 is rotated to the position relative to the slide plate 1, the detection member in the scraper-slide plate 1 linkage system sends a command, the slide plate oil cylinder 4 extends, the slide plate 1 moves up, and the scraper-slide mechanism returns to the initial position, as shown in Fig. Figure 2 e, ready for the next compression operation.

[0035] In the above description, the slide plate 1 moves up when the slide plate oil cylinder 4 extends and moves down when the slide plate oil cylinder 4 retracts, and the scraper 2 is in the folded position relative to the slide plate 1 when the scraper oil cylinder 3 extends and is in the open position relative to the slide plate 1 when the scraper oil cylinder 3 retracts, which is not absolute, and in actual application, the slide plate 1 can move down when the slide plate oil cylinder 4 extends and move up when the slide plate oil cylinder 4 retracts, or the scraper 2 can be in the open position relative to the slide plate 1 when the scraper oil cylinder 3 extends and in the folded position relative to the slide plate 1 when the scraper oil cylinder 3 retracts.

[0036] The garbage compression vehicle scraper-slide plate linkage system provided by the embodiment of the application will be described below.

[0037] Please refer to Figure 3 , Figure 3 The structure diagram of the garbage compression vehicle scraper-slide plate linkage system provided by the embodiment of the application.

[0038] The garbage compression vehicle scraper-slide plate linkage system provided by the embodiment of the application comprises a scraper oil cylinder 3, a slide plate oil cylinder 4, a three-position four-way electromagnetic valve 5, a three-position four-way hydraulic control valve 6, and a differential pressure control device.

[0039] The two working ports of the three-position four-way electromagnetic valve 5 are respectively communicated with the two working ports of the scraper oil cylinder 3, the two working ports of the three-position four-way hydraulic control valve 6 are respectively communicated with the two working ports of the sliding plate oil cylinder 4, the oil taking port of the differential pressure control device is communicated with the scraper oil cylinder 3, the oil outlet ports of the differential pressure control device are respectively connected with the two control ports of the three-position four-way hydraulic control valve 6, and the differential pressure control device is used for outputting control oil to control the three-position four-way hydraulic control valve 6 to switch from the middle position to the left position or the right position when the scraper oil cylinder 3 is in the fully extended state and the fully retracted state; during the garbage compression operation, first, the right electromagnetic iron DT2 of the three-position four-way electromagnetic valve 5 is powered on, the three-position four-way electromagnetic valve 5 is in the right working position, the three-position four-way hydraulic control valve is in the middle position (initial state) or the left working position (end of the last cycle), the sliding plate oil cylinder 4 is not moved due to pressure accumulation, the rod cavity of the scraper oil cylinder 3 is connected with the oil pump through the three-position four-way electromagnetic valve 5, the rodless cavity of the scraper oil cylinder 3 is communicated with the oil tank through the three-position four-way electromagnetic valve 5, the scraper oil cylinder 3 is retracted, when the scraper oil cylinder 3 is fully retracted, the pressure in the rod cavity of the scraper oil cylinder 3 is higher than the pressure in the rodless cavity, at this time, the hydraulic oil in the scraper oil cylinder 3 is output to the right control port of the three-position four-way hydraulic control valve 6 through the pressure control device, the three-position four-way hydraulic control valve 6 switches to the right working position, the rod cavity of the sliding plate oil cylinder 4 is communicated with the oil pump through the three-position four-way hydraulic control valve 6, and the rodless cavity of the sliding plate oil cylinder 4 is communicated with the oil tank through the three-position four-way hydraulic control valve 6, so that the sliding plate oil cylinder 4 starts to retract, and the opening of the scraper 2 and the downward movement of the sliding plate 1 are completed; then, the right electromagnetic iron DT1 of the three-position four-way electromagnetic valve 5 is powered on, the three-position four-way electromagnetic valve 5 switches to the left working position, the rodless cavity of the scraper oil cylinder 3 is connected with the oil pump through the three-position four-way electromagnetic valve 5, the rod cavity of the scraper oil cylinder 3 is communicated with the oil tank through the three-position four-way electromagnetic valve 5, the scraper oil cylinder 3 is extended, when the scraper oil cylinder 3 is fully extended, the pressure in the rodless cavity of the scraper oil cylinder 3 is higher than the pressure in the rod cavity, at this time, the hydraulic oil in the scraper oil cylinder 3 is output to the left control port of the three-position four-way hydraulic control valve 6 through the pressure control device, the three-position four-way hydraulic control valve 6 switches to the left working position, the rodless cavity of the sliding plate oil cylinder 4 is communicated with the oil pump through the three-position four-way hydraulic control valve 6, and the rod cavity of the sliding plate oil cylinder 4 is communicated with the oil tank through the three-position four-way hydraulic control valve 6, so that the sliding plate oil cylinder 4 starts to extend, and the scraping of the scraper 2 and the upward movement of the sliding plate 1 are completed, that is, the scraping and compression of the garbage are completed.

[0040] Compared with the prior art, the garbage compression truck scraper sliding plate linkage system provided by the application utilizes the pressure difference between the rod cavity and the rodless cavity of the scraper oil cylinder 3 when the scraper oil cylinder 3 is fully extended or fully retracted to output control oil to control the three-position four-way hydraulic control valve 6 connected with the sliding plate oil cylinder 4, and then realizes the linkage of the scraper sliding plate 1, so that the phenomenon that the state detection device of the scraper oil cylinder 3 is covered by garbage and dirt due to dirty working environment and fails can be completely avoided, and the stability of the scraper sliding mechanism is improved.

[0041] Exemplarily, as Figures 3-5As shown, in one embodiment of the present invention, the differential pressure control device includes two differential pressure signaling modules 7 and 8. Each differential pressure signaling module includes a cartridge valve 12 and a check valve 14. The cartridge valve 12 and the check valve 14 are connected in series between the two working ports of the differential pressure signaling module, which serve as the oil inlet of the differential pressure control device. The check valve 14 is located on the side of the working chamber of the cartridge valve 12 away from the control chamber of the cartridge valve 12. The check valve 14 is used for unidirectional flow from the scraper cylinder 3 to the cartridge valve 12. The oil outlet of the working chamber of the cartridge valve 12 of the two differential pressure signaling modules serves as the oil outlet of the differential pressure control device and is connected to the two control ports of the three-position four-way hydraulic valve 6. When the scraper cylinder 3 is in the fully extended state, the two working ports of one of the two differential pressure signaling modules are connected to the rod chamber and the rodless chamber of the scraper cylinder 3, respectively. When the scraper cylinder 3 is in the fully retracted state, the two working ports of the other of the two differential pressure signaling modules are connected to the rod chamber and the rodless chamber of the scraper cylinder 3, respectively.

[0042] Of course, the differential pressure control device is not limited to the above structure. In another embodiment, the differential pressure control device includes a two-position four-way hydraulic control valve 11, a shuttle valve 10, and two differential pressure signaling modules 7 and 8. The differential pressure signaling module includes a cartridge valve 12 and a check valve 14. The cartridge valve 12 and the check valve 14 are connected in series between the two working ports of the differential pressure signaling module, which serves as the oil inlet of the differential pressure control device. The check valve 14 is located on the side of the working chamber of the cartridge valve 12 away from the control chamber of the cartridge valve 12. The check valve 14 is used for unidirectional flow from the scraper cylinder 3 to the cartridge valve 12. The oil outlet of the working chamber of the cartridge valve 12 of the two differential pressure signaling modules is respectively connected to the two-position four-way hydraulic control valve. The two control ports of 11 are connected. When the scraper cylinder 3 is fully extended, the two working ports of one of the two differential pressure signaling modules are connected to the rod chamber and rodless chamber of the scraper cylinder 3, respectively. When the scraper cylinder 3 is fully retracted, the two working ports of the other of the two differential pressure signaling modules are connected to the rod chamber and rodless chamber of the scraper cylinder 3, respectively. The two inlets of shuttle valve 10 are connected to the two working ports of three-position four-way solenoid valve 5, respectively. The outlet of shuttle valve 10 is connected to the inlet of two-position four-way hydraulic control valve 11. The two working ports of two-position four-way hydraulic control valve 11 are connected to the two control ports of three-position four-way hydraulic control valve 6 as oil outlets of differential pressure control device.

[0043] Furthermore, in the two embodiments described above, the differential pressure signaling module also includes a throttling element 13, which is connected in parallel to both ends of the cartridge valve 12.

[0044] The working principle of the differential pressure signaling module is as follows:

[0045] When the rod chamber of scraper cylinder 3 is a pressure chamber and the piston of scraper cylinder 3 is located between the working ports a and b of differential pressure signaling module 7, such as Figure 6(1) as shown, the pressure oil from the work port b through the check valve 14 into the spool valve 12 working chamber, the rodless chamber of the scraper oil cylinder 3 is the return oil chamber, the pressure is zero, the spool of the spool valve 12 moves to the left, the oil outlet e of the spool valve 12 outputs control oil to control the three position four way hydraulic control valve 6; when the rodless chamber of the scraper oil cylinder 3 is the pressure chamber and the piston is located between the working port a and b of the differential pressure signaling module, the check valve 14 separates the rod chamber and the rodless chamber of the scraper oil cylinder 3, prevents the pressure oil in the rodless chamber of the scraper oil cylinder 3 from entering the rod chamber, the pressure oil enters the control chamber of the spool valve 12 after the working port a, and acts on the valve core after the pressure is reduced by the throttle 13 and enters the working chamber of the spool valve 12, because the pressure acting on the control chamber valve core is greater than the pressure acting on the working chamber valve core, and the acting area of the control chamber valve core of the spool valve 12 is greater than that of the working chamber valve core, therefore the spool valve 12 is closed, the oil outlet e of the spool valve 12 does not output control oil;

[0046] When the piston of the scraper oil cylinder 3 is located between the working port b and c of the two differential pressure signaling modules 7 and 8, as shown in Figure 6 (2) as shown, the pressure oil enters the control chamber and working chamber of the spool valve 12 through the working port a, b and working port d, c respectively, and acts on the valve core, the pressure acting on the control chamber valve core and the pressure acting on the working chamber valve core are the same, because the acting area of the control chamber valve core is greater than that of the working chamber valve core, therefore the spool valve 12 between the working port a, b and the spool valve 12 between the working port d, c are closed, the oil outlet e, f of the two spool valves 12 does not output control oil;

[0047] When the rodless chamber of the scraper oil cylinder 3 is the pressure chamber and the piston is located between the working port c and d of the differential pressure signaling module 8, as shown in Figure 6 (3) as shown, the pressure oil from the working port c through the check valve 14 enters the working chamber of the spool valve 12, the control chamber is communicated with the rod chamber of the scraper oil cylinder 3, the rod chamber is the return oil chamber, the pressure is zero, the pressure acting on the working chamber valve core is greater than the pressure acting on the control chamber valve core, therefore the oil outlet f of the spool valve 12 is opened, the pressure oil enters the three position four way hydraulic control valve 6 through the oil outlet f of the spool valve 12; when the rod chamber of the scraper oil cylinder 3 is the pressure chamber and the piston is located between the working port c and d of the differential pressure signaling module 8, the check valve 14 separates the rod chamber and the rodless chamber of the scraper oil cylinder 3, prevents the pressure oil in the rodless chamber of the scraper oil cylinder 3 from entering the rod chamber, the pressure oil enters the control chamber of the spool valve 12 after the working port d, and acts on the valve core, and enters the working chamber of the spool valve 12 after the pressure is reduced by the throttle 13, because the pressure acting on the control chamber valve core of the spool valve 12 is greater than the pressure acting on the working chamber valve core, and the acting area of the control chamber valve core of the spool valve 12 is greater than that of the working chamber valve core, therefore the spool valve 12 is closed, the oil outlet f of the spool valve 12 does not output control oil.

[0048] Further optimization of the above technical solutions, the above-mentioned scraper linkage system further comprises a hydraulic control check valve 9, the inlet and outlet of the hydraulic control check valve 9 are connected in series between one working port of the three-position four-way electromagnetic valve 5 and one working port of the scraper oil cylinder 3, and the control port of the hydraulic control check valve 9 is in communication with another working port of the three-position four-way electromagnetic valve 5.

[0049] As preferred, the above-mentioned scraper linkage system further comprises an instruction acquisition module for acquiring user instructions, the instruction acquisition module is connected with the controller of the garbage compression truck scraper linkage system, and the controller of the garbage compression truck scraper linkage system controls the three-position four-way electromagnetic valve 5 to change from the middle position to the left position or the right position according to the user instructions acquired by the instruction acquisition module, and the instruction acquisition module includes but is not limited to a remote controller, a touch screen, a keyboard, a voice receiving and recognizing device or a combination of at least two of the above four.

[0050] The embodiment of the application also provides a garbage compression truck, which comprises the garbage compression truck scraper linkage system described in the above-mentioned embodiments, and thus the technical effects of the garbage compression truck please refer to the above-mentioned embodiments.

[0051] Preferably, a first garbage amount detection device can be arranged in the hopper of the garbage compression truck, and the first garbage amount detection device can be one or a combination of more than one of a weight detection device, a volume detection device, a position detection device and a camera device, which is used to detect the amount of garbage entering the hopper, and when the amount of garbage in the hopper exceeds a first preset value, the above-mentioned feedback module can be used to feedback to the user, or the controller automatically controls the right electromagnetic iron DT2 of the three-position four-way electromagnetic valve 5 to be powered on to perform garbage compression operation when detecting that the amount of garbage in the hopper exceeds the first preset value, and the feedback module includes but is not limited to a display, a prompt sound or a vibration notification device.

[0052] Further, a second garbage amount detection device can also be arranged in the garbage box of the garbage compression truck, which is used to detect the amount of garbage in the garbage box, and similar to the above-mentioned first garbage amount detection device, the second garbage amount detection device can be composed of one or a combination of more than one of a weight detection device, a volume detection device, a position detection device and a camera device, and when the amount of garbage in the garbage box exceeds a second preset value, the above-mentioned feedback module can be used to alarm the user, so that the user can operate the garbage compression truck to a designated place in time for garbage dumping.

[0053] Each embodiment in the specification is described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same or similar parts of each embodiment can be referred to each other.

[0054] The foregoing description of the disclosed embodiments enables a person skilled in the art to make or use the application. Modifications of these embodiments will occur to persons of skill in the art, and that the appended claims are intended to cover all such modifications that do not depart from the true spirit and scope of the application. Therefore, the application is not limited to the embodiments shown but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A scraper plate linkage system for a garbage compactor truck, characterized in that, The differential pressure control device comprises two differential pressure signaling modules, the differential pressure signaling module comprises an insertion valve and a check valve, the insertion valve and the check valve are connected in series between the two working ports of the differential pressure signaling module as the oil inlet port of the differential pressure control device, the check valve is located on the side of the working cavity of the insertion valve away from the control cavity of the insertion valve, the check valve is used for one-way conduction from the scraper oil cylinder to the insertion valve, the oil outlet ports of the working cavities of the insertion valves of the two differential pressure signaling modules are connected to the two control ports of the three-position four-way hydraulic control valve as the oil outlet ports of the differential pressure control device, the two working ports of one of the two differential pressure signaling modules are connected to the rod cavity and the rodless cavity of the scraper oil cylinder when the scraper oil cylinder is in the fully extended state, and the two working ports of the other of the two differential pressure signaling modules are connected to the rod cavity and the rodless cavity of the scraper oil cylinder when the scraper oil cylinder is in the fully retracted state. The differential pressure control device comprises two differential pressure signaling modules, the differential pressure signaling module comprises an insertion valve and a check valve, the insertion valve and the check valve are connected in series between the two working ports of the differential pressure signaling module as the oil inlet port of the differential pressure control device, the check valve is located on the side of the working cavity of the insertion valve away from the control cavity of the insertion valve, the check valve is used for one-way conduction from the scraper oil cylinder to the insertion valve, the oil outlet ports of the working cavities of the insertion valves of the two differential pressure signaling modules are connected to the two control ports of the three-position four-way hydraulic control valve as the oil outlet ports of the differential pressure control device, the two working ports of one of the two differential pressure signaling modules are connected to the rod cavity and the rodless cavity of the scraper oil cylinder when the scraper oil cylinder is in the fully extended state, and the two working ports of the other of the two differential pressure signaling modules are connected to the rod cavity and the rodless cavity of the scraper oil cylinder when the scraper oil cylinder is in the fully retracted state. The differential pressure control device further comprises a liquid control check valve, the inlet and outlet of the liquid control check valve are connected in series between one working port of the three-position four-way electromagnetic valve and one working port of the scraper oil cylinder, and the control port of the liquid control check valve is connected to the other working port of the three-position four-way electromagnetic valve.

2. The linkage system of claim 1, wherein, The differential pressure signaling module further comprises a throttling element, and the throttling element is connected in parallel to the two ends of the insertion valve.

3. A linkage system for a slide plate of a garbage compression truck, characterized in that, The differential pressure control device comprises two differential pressure signaling modules, the differential pressure signaling module comprises an insertion valve and a check valve, the insertion valve and the check valve are connected in series between the two working ports of the differential pressure signaling module as the oil inlet port of the differential pressure control device, the check valve is located on the side of the working cavity of the insertion valve away from the control cavity of the insertion valve, the check valve is used for one-way conduction from the scraper oil cylinder to the insertion valve, the oil outlet ports of the working cavities of the insertion valves of the two differential pressure signaling modules are connected to the two control ports of the three-position four-way hydraulic control valve as the oil outlet ports of the differential pressure control device, the two working ports of one of the two differential pressure signaling modules are connected to the rod cavity and the rodless cavity of the scraper oil cylinder when the scraper oil cylinder is in the fully extended state, and the two working ports of the other of the two differential pressure signaling modules are connected to the rod cavity and the rodless cavity of the scraper oil cylinder when the scraper oil cylinder is in the fully retracted state. The differential pressure control device comprises a two-position four-way hydraulic control valve, a shuttle valve and two differential pressure signaling modules, the differential pressure signaling module comprises a cartridge valve and a check valve, the cartridge valve and the check valve are connected in series between two working ports of the differential pressure signaling module which is an oil outlet port of the differential pressure control device, the check valve is located on the side of the working cavity of the cartridge valve away from the control cavity of the cartridge valve, the check valve is used for one-way conduction from the scraper oil cylinder to the cartridge valve, the oil outlet ports of the working cavities of the cartridge valves of the two differential pressure signaling modules are connected with two control ports of the two-position four-way hydraulic control valve respectively, the two working ports of one of the two differential pressure signaling modules are respectively communicated with the rod cavity and the rodless cavity of the scraper oil cylinder when the scraper oil cylinder is in the fully extended state, the two working ports of the other of the two differential pressure signaling modules are respectively communicated with the rod cavity and the rodless cavity of the scraper oil cylinder when the scraper oil cylinder is in the fully retracted state, two inlets of the shuttle valve are connected with two working ports of the three-position four-way electromagnetic valve respectively, an outlet of the shuttle valve is connected with an inlet of the two-position four-way hydraulic control valve, two working ports of the two-position four-way hydraulic control valve as oil outlet ports of the differential pressure control device are connected with two control ports of the three-position four-way hydraulic control valve respectively. The differential pressure control device further comprises a hydraulic control check valve, an inlet and an outlet of the hydraulic control check valve are connected in series between one working port of the three-position four-way electromagnetic valve and one working port of the scraper oil cylinder, a control port of the hydraulic control check valve is communicated with the other working port of the three-position four-way electromagnetic valve, and the differential pressure control device further comprises an instruction acquisition module for acquiring user instructions.

4. The linkage system of claim 3, wherein, The differential pressure signaling module further comprises a throttling element, and the throttling element is connected in parallel at both ends of the cartridge valve.

5. The linkage system of claim 1, 2, 3, or 4, wherein: The instruction acquisition module is connected with a controller of the garbage compression truck scraper slide linkage system, and the controller of the garbage compression truck scraper slide linkage system controls the three-position four-way electromagnetic valve to switch from the middle position to the left position or the right position according to the user instructions acquired by the instruction acquisition module.

6. A refuse compactor vehicle characterized by, The garbage compression truck scraper slide linkage system comprises the differential pressure control device. The garbage compression truck scraper slide linkage system comprises the differential pressure control device.

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