Compression type garbage truck loading system, control method and storage medium

Abstract

The invention provides a compression garbage truck loading system, a control method and a storage medium, the system comprises a compression mechanism and a push shovel mechanism, and the compression mechanism comprises a sliding plate and a sliding plate oil cylinder used for driving the sliding plate; the push shovel mechanism comprises a push shovel, a push shovel oil cylinder used for driving the push shovel and a push shovel valve used for controlling the push shovel oil cylinder to retract, the system further comprises an oil pressure detection unit, a position detection unit and a control unit, and the oil pressure detection unit is used for detecting oil pressure information of a sliding plate oil cylinder in the garbage compression process of the sliding plate and uploading the oil pressure information to the control unit; the position detection unit is used for detecting the position information of the push shovel in the dustbin and uploading the position information to the control unit; the control unit is used for opening or closing the push shovel valve according to the oil pressure information and adjusting the back pressure of the push shovel oil cylinder according to the position information, it is guaranteed that the pressure of the push shovel oil cylinder is the maximum when the cylinder diameter is small and the pressure of the push shovel oil cylinder is the minimum when the cylinder diameter is large, and therefore the larger garbage compression ratio is obtained, and the garbage loading capacity of a single vehicle under the same volume is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of sanitation vehicles, and in particular to a compression type garbage truck loading system, a control method and a storage medium. Background Art

[0002] Compression garbage trucks are the main type of vehicle for garbage collection and transportation, and fuel-powered compression garbage trucks are gradually being replaced by new energy (pure electric) compression garbage trucks.

[0003] Specifically, a compression garbage truck usually includes a garbage bin, a filler, a scraper, a skateboard, a barrel-turning mechanism, a shovel and various driving cylinders. During the garbage loading process, the barrel-turning mechanism pours the garbage into the filler, and the scraper and the skateboard are driven by the cylinder to squeeze the garbage into the garbage bin, and the cycle is repeated until the entire garbage bin is filled.

[0004] However, in the prior art, when a compression garbage truck is filling garbage, the pusher cylinder that drives the pusher has multiple strokes, and each stroke corresponds to a different cylinder diameter, resulting in a large deviation in the output at each stroke. In particular, when the pusher cylinder is in a small cylinder diameter stroke segment, the back force provided is much smaller than the back force provided in a large cylinder diameter stroke segment. As a result, the garbage is prone to become loose during the backward movement of the pusher and needs to be compressed again, which increases power loss and reduces cruising range. Summary of the invention

[0005] Based on this, the purpose of the present invention is to provide a compression garbage truck loading system, control method and storage medium to solve the technical problems mentioned in the above background technology.

[0006] In one aspect, the present invention provides a compression type garbage truck loading system, comprising a compression mechanism and a shovel mechanism, wherein the compression mechanism comprises a slide plate and a slide plate cylinder for driving the slide plate;

[0007] The push shovel mechanism includes a push shovel, a push shovel cylinder for driving the push shovel, and a push shovel valve for controlling the retraction of the push shovel cylinder. The system also includes an oil pressure detection unit, a position detection unit, and a control unit. The oil pressure detection unit is used to detect the oil pressure information of the slide cylinder during the process of the slide compressing garbage, and upload the oil pressure information to the control unit;

[0008] The position detection unit is used to detect the position information of the bulldozer in the garbage bin and upload the position information to the control unit;

[0009] The control unit is used to open or close the dozer valve according to the oil pressure information, and to adjust the back pressure of the dozer cylinder according to the position information.

[0010] Furthermore, the compression garbage truck loading system, wherein the bulldozer valve includes a hydraulic sequence valve, and a plurality of different gear overflow valves connected to the hydraulic sequence valve, the plurality of overflow valves are arranged in parallel and connected to the oil circuit of the bulldozer cylinder, and the hydraulic sequence valve is connected to the oil circuit of the skateboard cylinder.

[0011] Furthermore, in the compression garbage truck loading system, the push shovel cylinder is a three-stage telescopic cylinder, and the number of the overflow valves is 3, namely a first-stage overflow valve, a second-stage overflow valve and a third-stage overflow valve, wherein the overflow pressure of the first-stage overflow valve is smaller than that of the second-stage overflow valve, the overflow pressure of the second-stage overflow valve is smaller than that of the third-stage overflow valve, the first-stage overflow valve is connected in series with a first normally closed switch, and the second-stage overflow valve is connected in series with a second normally closed switch.

[0012] Furthermore, in the compression type garbage truck loading system, the garbage bin is sequentially divided into a first level position interval, a second level position interval and a third level position interval in the direction of the rear of the vehicle;

[0013] When the position detection unit detects that the push blade is in the third position range, the first normally closed switch and the second normally closed switch are both closed, thereby connecting the oil circuit between the third-level relief valve and the push blade cylinder;

[0014] When the position detection unit detects that the push blade is in the second-stage position interval, only the second normally closed switch is opened, thereby connecting the oil circuit between the secondary relief valve and the push blade cylinder;

[0015] When the position detection unit detects that the push blade is in the first position interval, only the first normally closed switch is opened to connect the oil circuit between the first-level relief valve and the push blade cylinder.

[0016] Furthermore, the compression garbage truck loading system further includes a display unit, wherein the control unit is used to calculate the loading capacity of garbage in the garbage bin according to the position information of the push shovel, and display the loading capacity through the display unit.

[0017] Another aspect of the present invention provides a loading control method for a compression garbage truck, the method comprising:

[0018] During the process of the skateboard compressing the garbage, the oil pressure information of the skateboard cylinder and the position information of the shovel in the garbage bin are detected;

[0019] The push-blade valve is controlled to be opened or closed according to the oil pressure information, and the back pressure of the push-blade cylinder is adjusted in real time according to the position information.

[0020] Furthermore, in the compression garbage truck loading control method, the step of controlling the opening or closing of the push shovel valve according to the oil pressure information comprises:

[0021] When it is detected that the oil pressure information is less than or equal to the preset oil pressure, the dozer valve is controlled to be closed;

[0022] When it is detected that the oil pressure information is greater than the preset oil pressure, the dozer valve is controlled to open.

[0023] Furthermore, in the compression garbage truck loading control method, the garbage bin is sequentially divided into a first-level position interval, a second-level position interval and a third-level position interval in the direction of the rear of the vehicle;

[0024] The step of adjusting the back pressure of the push shovel cylinder according to the position information comprises:

[0025] When it is detected that the push shovel is in the third position interval, the back pressure of the push shovel cylinder is adjusted to P1;

[0026] When it is detected that the push shovel is in the second position interval, adjusting the back pressure of the push shovel cylinder to P2;

[0027] When it is detected that the push shovel is in the first position interval, adjusting the back pressure of the push shovel cylinder to P3;

[0028] Among them, P1 is greater than P2, and P2 is greater than P3.

[0029] Furthermore, in the compression garbage truck loading control method, after the step of controlling the opening or closing of the push shovel valve according to the oil pressure information and adjusting the back pressure of the push shovel cylinder in real time according to the position information, the method further includes:

[0030] The loading amount of the garbage in the garbage bin is calculated according to the position information of the push shovel, and the loading amount is displayed through a display unit.

[0031] On the other hand, the present invention further proposes a computer-readable storage medium, which stores a plurality of instructions suitable for loading by a processor to execute the compression garbage truck loading control method described in the above technical solution.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] The position detection unit obtains the position information of the bulldozer in real time, and adjusts the back pressure of the bulldozer cylinder according to the position information of the bulldozer, ensuring that the pressure of the bulldozer cylinder is maximum when the cylinder diameter is small and minimum when the cylinder diameter is large, so as to obtain a larger garbage compression ratio, increase the garbage loading capacity of a single vehicle with the same volume, avoid repeated compression and increase operation power consumption, and improve vehicle range. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the overall structure of the compression type garbage truck in the present invention;

[0035] Figure 2 It is a structural schematic diagram of the push shovel valve in the present invention;

[0036] Figure 3 It is a system hydraulic principle diagram of the compression garbage truck of the present invention;

[0037] Figure 4 This is a system electrical schematic diagram of the compression garbage truck of the present invention;

[0038] Description of main component symbols:

[0039] 1. Trash bin; 2. Dozer cylinder; 3. Dozer; 4. Loader; 5. Slide plate; 6. Scraper cylinder; 7. Scraper; 8. Slide plate cylinder; 9. Dozer valve; 91. Hydraulic sequence valve; 92. First-stage relief valve; 93. Second-stage relief valve; 94. Third-stage relief valve; 95. First normally closed switch; 96. Second normally closed switch; 10. Display unit; 11. Control unit; 12. Position detection unit.

[0040] The following specific implementation manner will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0041] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0042] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0044] The following embodiments can be applied to Figure 1 The compression type garbage truck shown in the figure consists of a garbage bin 1, a loader 4, a push shovel 3, a slide plate 5, a scraper 7, a hydraulic and electrical system, and adopts a bidirectional compression method for garbage loading operations. The power is provided by a hydraulic pump and transmitted to the actuator cylinder through a pipeline. The control valve controls the direction so that the cylinder pushes the scraper 7 to open / close, the slide plate 5 to rise / fall, and the push shovel 3 to push out / retract, thereby realizing the garbage loading operation function.

[0045] Those skilled in the art can understand that Figure 1 The structure of the compression type garbage truck shown in the figure does not constitute a limitation on the compression type garbage truck. In actual implementation, the compression type garbage truck may also include more or fewer components than shown in the figure, or a combination of certain components, or a different arrangement of components.

[0046] Specifically, the trash bin 1 is a box for storing trash, which is welded from retail parts such as a floor, side panels, a top panel, a front panel and a rear frame, and has an opening at the rear for loading and unloading trash;

[0047] The filler 4 is arranged at the rear end of the trash bin 1, and has a loading mechanism and a rear cover door mechanism, etc. The slide plate 5, the scraper 7 and the related motion mechanism are all installed on the filler 4, and the garbage is compressed and filled into the trash bin 1 through the combined motion of various mechanisms;

[0048] The slide plate 5 is slidably arranged on the track of the filler 4 and is connected to a slide plate oil cylinder 8. The slide plate 5 can slide up and down along the track at an angle of 45 degrees to the horizontal direction under the drive of the slide plate oil cylinder 8, and is combined with the scraper 7 to form a compression mechanism to perform garbage compression operations;

[0049] The scraper 7 is installed on the hinge point of the slide plate 5 and is connected to a scraper cylinder 6. The scraper 7 can be driven by the scraper cylinder 6 to rotate around the hinge point to push the garbage into the garbage bin 1.

[0050] The push shovel 3 is slidably arranged in the garbage bin 1 and is connected to a push shovel cylinder 2. The push shovel 3 can move forward or backward along the horizontal direction of the garbage bin 1 under the drive of the push shovel cylinder 2. When loading garbage, it plays the role of a baffle, exerts a back force on the garbage, performs back compression, and works together with the compression mechanism to play a bidirectional compression role; when unloading, under the force of the push shovel cylinder 2, the push shovel 3 pushes the garbage to the rear end of the garbage bin 1 to perform the unloading operation; wherein, the push shovel cylinder 2 is a multi-stage telescopic cylinder, which can achieve a long stroke and a short installation distance at the same time, and pushes or pulls the push shovel 3 to move in the horizontal direction under the force of the hydraulic oil pressure; it can also play a damping role when the push shovel 3 is forced to retreat, so that the push shovel 3 retreats under a certain resistance, and the size of the resistance can be controlled by adjusting the back pressure (unloading pressure) of the push shovel cylinder 2.

[0051] A position detection unit 12 is provided at the front end of the garbage bin 1, and the position detection unit 12 is used to detect the real-time position of the shovel 3 and send it to the vehicle controller;

[0052] A dozer valve 9 is provided between the garbage bin 1 and the front of the vehicle. The dozer valve 9 is a switch for controlling the retraction of the dozer cylinder 2. It is integrated by a hydraulic sequence valve 91 and a relief valve. The unloading pressure of the relief valve is adjusted to control the unloading pressure of the piston chamber when the dozer cylinder 2 retracts, thereby adjusting the back pressure of the dozer 3, thereby affecting the size of the garbage compression ratio.

[0053] In actual application, with the reciprocating motion of the slide plate 5 and the scraper 7, the garbage is compressed into the garbage bin 1. When it is detected that the compression force reaches the set pressure, the push shovel valve 9 opens, and the push shovel 3 retreats under the thrust transmitted by the garbage. When the push shovel 3 retreats, the unloading pressure (back pressure) of the push shovel cylinder 2 is controlled by the push shovel valve 9, so that the push shovel 3 maintains a certain back pressure on the garbage and retreats, so that the front garbage is kept in a compressed state and loaded into the garbage bin 1. After such a reciprocating cycle of loading, the push shovel 3 retreats to the "0 position" of the garbage bin 1, the sensor sends a position signal, the system prompts that it is fully loaded, and the operation stops.

[0054] In addition, it should be noted that the above-mentioned slide plate cylinder 8 and scraper plate cylinder 6 are both bidirectional piston cylinders, which drive the slide plate 5 or scraper plate 7 to move through the hydraulic oil pressure force.

[0055] First embodiment

[0056] See also Figure 1 The compression type garbage truck loading system in the first embodiment of the present invention includes a compression mechanism and a push shovel mechanism. The compression mechanism includes a slide plate 5 and a slide plate cylinder 8 for driving the slide plate 5; the push shovel mechanism includes a push shovel 3, a push shovel cylinder 2 for driving the push shovel 3 and a push shovel valve 9 for controlling the retraction of the push shovel cylinder 2.

[0057] The system also includes an oil pressure detection unit (not shown), a position detection unit 12 and a control unit 11. The oil pressure detection unit is used to detect the oil pressure information of the slide cylinder 8 during the process of the slide 5 compressing the garbage, and upload the oil pressure information to the control unit 11; the position detection unit 12 is used to detect the position information of the dozer 3 in the garbage bin 1, and upload the position information to the control unit 11; the control unit 11 is used to open or close the dozer valve 9 according to the oil pressure information, and adjust the back pressure of the dozer cylinder 2 according to the position information.

[0058] The position information of the dozer 3 is obtained in real time through the position detection unit 12, and the back pressure of the dozer cylinder 2 is adjusted according to the position information of the dozer 3 to ensure that the pressure of the dozer cylinder 2 is maximum when the cylinder diameter is small and minimum when the cylinder diameter is large, so as to obtain a larger garbage compression ratio, increase the garbage loading capacity of a single vehicle with the same volume, avoid repeated compression to increase operating power consumption, and improve the vehicle's cruising range.

[0059] In addition, it is worth mentioning that the existing compression garbage truck garbage bin 1 has an effective volume of 13 cubic meters, a single vehicle loading capacity of 9 tons, a compaction density of about 0.7 tons / cubic meter, a single-trip mileage of about 50 km, and a fuel truck can operate five times a day, with a total daily transport volume of 9×5=45 tons per truck; this solution improves the garbage compression ratio by more than 25% by improving the two-way compression force of the compression garbage truck, with a compaction density of about 0.9 tons / cubic meter. With the same volume, the single vehicle can increase the loading capacity by 2.5 tons, and the single vehicle loading capacity reaches 11.5 tons. Four trips a day can transport 46 tons of garbage, which can match the 45-ton transport volume of five trips a day of a fuel truck, meet the needs of the usage scenario, and can achieve a 1:1 replacement with a fuel truck.

[0060] It should be noted that the reason why the back pressure of the push shovel cylinder 2 is adjusted according to the position of the push shovel 3 in the garbage bin 1 in this embodiment is that when the push shovel 3 is in different positions, the corresponding cylinder diameters of the push shovel cylinder 2 are different. Taking the three-stage telescopic cylinder in this embodiment as an example, the cylinder diameters of the three stages are 115, 90, and 70 mm, respectively, with a difference of more than 20 mm. If the back pressure of the push shovel cylinder 2 is set to a fixed value, the back force applied when the cylinder diameter is small is much smaller than the back force applied when the cylinder diameter is large, thereby reducing the uniformity of garbage loading and the garbage compression ratio.

[0061] Based on the above reasons, the present embodiment makes improvements to the dozer valve 9 to make real-time adjustments to the back pressure of the dozer cylinder 2 according to the position of the dozer 3, ensuring that the pressure is maximum when the cylinder diameter is small and minimum when the cylinder diameter is large, thereby improving the uniformity of garbage loading and obtaining a greater garbage compression ratio.

[0062] Specifically, in this embodiment, the bulldozer valve 9 includes a hydraulic sequence valve 91, and a plurality of relief valves of different gears connected to the hydraulic sequence valve 91. The plurality of relief valves are arranged in parallel and connected to the oil circuit of the bulldozer cylinder 2. The hydraulic sequence valve 91 is connected to the oil circuit of the slide cylinder 8. The bulldozer cylinder is a three-stage telescopic cylinder. The number of relief valves is 3, namely, a primary relief valve 92, a secondary relief valve 93 and a tertiary relief valve 94. The relief pressure of the primary relief valve 92 is less than that of the secondary relief valve 93, and the relief pressure of the secondary relief valve 93 is less than that of the tertiary relief valve 94. The primary relief valve 92 is connected in series with a first normally closed switch 95, and the secondary relief valve 93 is connected in series with a second normally closed switch 96.

[0063] For further information, see Figure 1 and Figure 2 The trash bin 1 is divided into a first-level position interval, a second-level position interval and a third-level position interval in sequence toward the rear of the vehicle;

[0064] When the position detection unit 12 detects that the push blade 3 is in the third position range, the first normally closed switch 95 and the second normally closed switch 96 are both closed, thereby connecting the oil circuit between the third-level relief valve 94 and the push blade cylinder 2;

[0065] When the position detection unit 12 detects that the dozer 3 is in the second position range, only the second normally closed switch 96 is opened, thereby connecting the oil circuit between the secondary relief valve 93 and the dozer cylinder 2;

[0066] When the position detection unit 12 detects that the push blade 3 is in the first position interval, only the first normally closed switch 95 is opened, thereby connecting the oil circuit between the first-level relief valve 92 and the push blade cylinder 2 .

[0067] Illustratively, in this embodiment, the specifications of the first-stage relief valve 92 , the second-stage relief valve 93 , and the third-stage relief valve 94 are 12 MPa, 18 MPa, and 26 MPa, respectively, and the specification of the hydraulic sequence valve 91 is 18 MPa. In actual application, as the slide plate 5 continuously compresses the garbage, until the oil pressure detection unit detects that the oil pressure of the slide plate cylinder 8 reaches 18MPa set by the hydraulic sequence valve 91, the control unit 11 controls the dozer valve 9 to open (the dozer 3 begins to retreat due to the thrust transmitted by the garbage), and at the same time, according to the position of the dozer 3 in the garbage bin 1, controls the first normally closed switch 95 and the second normally closed switch 96 to select the corresponding overflow valve. Specifically, when the dozer 3 is in the third-level position interval, the 26MPa overflow valve is passed through, and when it is in the second-level position interval, the 18MPa overflow valve is opened. By utilizing the fluid characteristics, the dozer 3 is refueled and returns to the oil tank through the 18MPa overflow valve. When it is in the first-level position interval, the 12MPa overflow valve is opened. By utilizing the fluid characteristics, the dozer 3 is refueled and returns to the oil tank through the 12MPa overflow valve, thereby realizing back pressure graded control.

[0068] In addition, it should be noted that the demarcation of the first-level position interval, the second-level position interval, and the third-level position interval in the garbage bin 1, as well as the selection of the number of relief valves, are mainly determined based on the telescopic section of the push shovel cylinder 2. It can be understood that in this application, the push shovel cylinder 2 is a three-stage telescopic cylinder, corresponding to three intervals set in the garbage bin 1, respectively corresponding to each telescopic section of the push shovel cylinder 2, and the same is true for the relief valve. Secondly, regarding the overflow pressure setting of the relief valve, the user can set it according to the actual parameters of the push shovel cylinder 2. This embodiment is only an example and not a limitation.

[0069] In this embodiment, the position detection unit 12 uses a displacement sensor or a laser sensor to measure the position of the dozer 3, and calculates through the control unit 11 which level of stroke the dozer cylinder 2 is in and the corresponding cylinder diameter, and sets different back unloading pressures to ensure that the pressure is maximum when the cylinder diameter is small and minimum when the cylinder diameter is large, thereby obtaining a larger garbage compression ratio. A comparison with the existing solution is shown in Table 1 below.

[0070] Table 1:

[0071]

[0072] It can be seen that the back pressure of the solution of the present invention is higher than that of the existing technical solution. The back pressure is increased by 50% at the second stage cylinder diameter and by 117% at the third stage. The garbage compression ratio is greater and the loading capacity is higher.

[0073] It should be noted that the compression force of the slide plate 5 is determined by the push force of the two slide plate cylinders 8, F 压缩力 =2×F 滑板油缸推力 =2×P 系统压力 ×(π×r 2), the piston half cylinder r is selected unchanged, the thrust is proportional to the system pressure, the hydraulic system pressure of the compression garbage truck is generally set to 18MPa, and the maximum operating pressure is fixed after setting, so the maximum compression force remains unchanged.

[0074] Furthermore, in this embodiment, the compression garbage truck loading system also includes a display unit 10, which is a touch screen disposed in the cab. The touch screen has an integrated control switch function, and each function switch can be controlled by clicking on the screen.

[0075] In addition, in this embodiment, the control unit 11 can also calculate the loading amount of garbage in the garbage bin according to the position information of the shovel, and display the loading amount through the display unit 10. This is helpful for the driver to grasp the capacity in real time and prevent overloading; in addition, the loading amount information of the vehicle is transmitted to the background sanitation management system in real time, which is convenient for data management and can meet the functions of intelligent route planning.

[0076] The overall control scheme of the above compression garbage truck loading system is as follows:

[0077] 1) After the upper control system receives the "loading" command from the loading switch, the control unit 11 controls the hydraulic multi-way valve to switch direction, the reversing circuit of the scraper cylinder 6 is opened, and the scraper cylinder 6 pulls the scraper 7 to reverse. After the reversal is in place, the position sensor senses the position of the scraper 7 and sends a position signal to the control unit 11. The control unit 11 closes the hydraulic circuit, and the scraper 7 stops reversing;

[0078] 2) After the "reverse" action is completed, the "descent" action is started at the same time, the control unit 11 controls the hydraulic multi-way valve slide circuit valve core to change direction, the slide cylinder 8 retracts, drives the slide 5 and the scraper 7 to slide down, and squeezes the garbage. After sliding down to the right position, the position sensor senses that the slide 5 is in place, and sends a position signal to the control unit 11. The control unit 11 closes the hydraulic circuit, and the slide 5 stops descending;

[0079] 3) After the "descending" action is completed, the "compression" is started at the same time, the control unit 11 controls the hydraulic multi-way valve scraper circuit valve core to change direction, the scraper cylinder 6 is pushed out, and the scraper 7 is pushed to compress and flip, and the garbage is compressed. After the compression is in place, the position sensor senses the position of the scraper 7 and sends a position signal to the control unit 11. The control unit 11 closes the hydraulic circuit and the scraper 7 stops compressing;

[0080] 4) After the "compression" action is completed, the "ascending" action is started at the same time. The control unit 11 controls the hydraulic multi-way valve slide circuit valve core to change direction, and the slide cylinder 8 is pushed out, driving the slide 5 and the scraper 7 to slide upward, pressing the garbage into the garbage bin 1. After rising to the right position, the position sensor senses the position of the slide 5 and sends a position signal to the control unit 11. The control unit 11 closes the hydraulic circuit and the slide 5 stops rising;

[0081] 5) After one "loading" instruction is completed, the next "loading" instruction is issued, and the operation is circulated again to continuously press the garbage into the garbage bin 1; the push shovel 3 remains stationary, and the garbage loading space remains unchanged. After multiple garbage compression and loading operations, the greater the reaction force of the garbage on the scraper 7, the greater the compression force required, and finally the compression force reaches the set maximum value;

[0082] 6) When the oil pressure detection unit detects that the compression force reaches the set maximum value (i.e., the oil pressure of the slide cylinder 8 reaches the maximum pressure set by the system), the push shovel valve 9 opens, and the push shovel 3 retreats under the thrust transmitted by the garbage. When retreating, the push shovel cylinder 2 has a back pressure to support the push shovel 3, so that the garbage remains compressed and pressed into the garbage bin 1; in this process, ensure that the horizontal direction (F 压缩力 -f 垃圾阻力 )>f 背向压力 , the shovel can move backward, and F 压缩力 -f 垃圾阻力 -f 背向压力 =The smaller the difference, the greater the bidirectional compression force, the higher the compression ratio of the garbage when the push shovel 3 moves backward, and the greater the loading capacity.

[0083] 7) As the dozer 3 moves backward, the enclosed loading space expands, the compressed garbage becomes loose, the reaction force on the scraper 7 becomes smaller, and the load transmitted to the slide cylinder 8 becomes smaller. According to P=F / S, the pressure of the slide cylinder 8 decreases accordingly. When it is lower than the set pressure value, the dozer valve 9 is closed, the dozer 3 stops moving backward, and continues to load the garbage. When it is compressed to a certain extent, the compression force reaches the maximum value again, the dozer valve 9 opens again, and the dozer 3 moves backward. This cycle is repeated, so that the garbage is continuously compressed into the garbage bin 1. During the dozer's backward movement, the dozer's back pressure is adjusted in real time by the dozer valve according to the position of the dozer in the garbage bin 1, so that the garbage is not easy to become loose. In order to avoid repeated compression, more work is done, power loss is smaller, and electricity consumption is lower.

[0084] See the system hydraulic schematic diagram in the above garbage truck loading system Figure 3 , refer to the system electrical schematic diagram Figure 4 .

[0085] In summary, the compression type garbage truck loading system in the above embodiment of the present invention obtains the position information of the push shovel in real time through the position detection unit, and adjusts the back pressure of the push shovel cylinder according to the position information of the push shovel, to ensure that the pressure of the push shovel cylinder is maximum when the cylinder diameter is small and minimum when the cylinder diameter is large, so as to obtain a larger garbage compression ratio, increase the garbage loading capacity of a single vehicle with the same volume, avoid repeated compression to increase operating power consumption, and improve the vehicle's cruising range.

[0086] Second embodiment

[0087] A second embodiment of the present invention provides a compression type garbage truck loading control method, which is used in the compression type garbage truck loading system described in the fuselage scheme, and the method includes:

[0088] S01, detecting the oil pressure information of the slide cylinder and the position information of the shovel in the garbage bin during the process of the slide compressing the garbage;

[0089] S02, controlling the bulldozer valve to open or close according to the oil pressure information, and adjusting the back pressure of the bulldozer cylinder in real time according to the position information.

[0090] Specifically, the step of controlling the opening or closing of the dozer valve according to the oil pressure information includes:

[0091] S021-1, when it is detected that the oil pressure information is less than or equal to the preset oil pressure, controlling the dozer valve to close;

[0092] S022-1, when it is detected that the oil pressure information is greater than the preset oil pressure, the dozer valve is controlled to open.

[0093] It can be understood that when it is detected that the pressure of the slide cylinder reaches the threshold set by the system, it means that the compression force of the slide on the garbage has reached the set maximum value. At this time, the push shovel valve opens, and the push shovel retreats under the thrust transmitted by the garbage. When retreating, the push shovel cylinder has a back pressure to support the push shovel, so that the garbage remains compressed and pressed into the garbage bin; in this process, ensure that the horizontal direction (F 压缩力 -f 垃圾阻力 )>f 背向压力 , the shovel can move backward, and F 压缩力 -f 垃圾阻力 -f 背向压力 =The smaller the difference, the greater the bidirectional compression force, the higher the compression ratio of the garbage when the shovel moves backward, and the greater the loading capacity.

[0094] In this embodiment, the trash bin is divided into a first-level position interval, a second-level position interval and a third-level position interval in sequence toward the rear of the vehicle;

[0095] The step of adjusting the back pressure of the push shovel cylinder according to the position information comprises:

[0096] S021-2, when it is detected that the push shovel is in the third position interval, adjusting the back pressure of the push shovel cylinder to P1;

[0097] S022-2, when it is detected that the push shovel is in the second position interval, adjusting the back pressure of the push shovel cylinder to P2;

[0098] S023-2, when it is detected that the push shovel is in the first position interval, adjusting the back pressure of the push shovel cylinder to P3;

[0099] Among them, P1 is greater than P2, and P2 is greater than P3.

[0100] In this embodiment, P1 is 26MPa, P2 is 18MPa, and P3 is 12MPa. The back pressure of the push-blade oil cylinder is mainly regulated by the push-blade valve. Figure 2 The bulldozer valve is designed with relief valves with different relief pressures. The P port is connected to the oil circuit of the bulldozer cylinder, and the K port is connected to the oil circuit of the slide plate cylinder. When the slide plate reaches a pressure of 18MPa, the bulldozer valve opens, and the bulldozer 3 begins to retreat. In the third-level position interval, the 26MPa relief valve is passed. In the second-level position interval, the 18MPa relief valve is opened. By utilizing the fluid characteristics, the bulldozer is refueled and returns to the oil tank through the 18MPa relief valve. In the first-level position interval, the 12MPa relief valve is opened. By utilizing the fluid characteristics, the bulldozer is refueled and returns to the oil tank through the 12MPa relief valve, thereby realizing back pressure graded control.

[0101] Furthermore, after the step of controlling the opening or closing of the dozer valve according to the oil pressure information and adjusting the back pressure of the dozer cylinder in real time according to the position information, the method further includes:

[0102] S03, calculating the loading amount of the garbage in the garbage bin according to the position information of the shovel, and displaying the loading amount through a display unit.

[0103] It can be understood that the position detection unit measures the distance of the shovel and converts it into the load capacity by the control unit. The loading volume of the garbage bin is displayed in real time on the large screen in the cab, realizing the visualization of the garbage loading capacity. It is helpful for the driver to grasp the capacity in real time and prevent overloading. In addition, the vehicle loading information is fed back to the background sanitation management system in real time, which is convenient for data management and can meet the functions of intelligent route planning.

[0104] In summary, the compression type garbage truck loading control method in the above embodiment of the present invention obtains the position information of the push shovel in real time, and adjusts the back pressure of the push shovel cylinder according to the position information of the push shovel, to ensure that the pressure of the push shovel cylinder is maximum when the cylinder diameter is small and minimum when the cylinder diameter is large, so as to obtain a larger garbage compression ratio, increase the garbage loading capacity of a single vehicle with the same volume, avoid repeated compression to increase operating power consumption, and improve vehicle cruising range.

[0105] A third embodiment of the present invention provides a computer-readable storage medium, which stores a plurality of instructions suitable for loading by a processor to execute the above-mentioned compression garbage truck loading control method.

[0106] Those skilled in the art will appreciate that the logic and / or steps represented in the flowchart or otherwise described herein, for example, may be considered as an ordered list of executable instructions for implementing logical functions, and may be specifically implemented in any computer-readable medium for use by an instruction execution system or device (such as a computer-based system, a system including a processor, or other system that can obtain instructions from an instruction execution system or device and execute instructions), or in conjunction with such instruction execution systems or devices. For purposes of this specification, "computer-readable medium" may be any device that can contain, store, communicate, propagate, or transmit a program for use by an instruction execution system or device, or in conjunction with such instruction execution systems or devices.

[0107] More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk case (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be a paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering or, if necessary, processing in another suitable manner, and then stored in a computer memory.

[0108] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or a combination thereof: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0109] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0110] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A compression type garbage truck loading system, comprising a compression mechanism and a shovel mechanism, wherein the compression mechanism comprises a slide plate and a slide plate cylinder for driving the slide plate; The dozer mechanism comprises a dozer, a dozer cylinder for driving the dozer, and a dozer valve for controlling the retraction of the dozer cylinder, and is characterized in that: The system further comprises an oil pressure detection unit, a position detection unit and a control unit, wherein the oil pressure detection unit is used to detect the oil pressure information of the slide cylinder during the process of the slide compressing garbage, and upload the oil pressure information to the control unit; The position detection unit is used to detect the position information of the bulldozer in the garbage bin and upload the position information to the control unit; The control unit is used to open or close the dozer valve according to the oil pressure information, and to adjust the back pressure of the dozer cylinder according to the position information.

2. The compression garbage truck loading system according to claim 1, characterized in that: The bulldozer valve includes a hydraulic sequence valve and a plurality of relief valves of different gears connected to the hydraulic sequence valve. The plurality of relief valves are arranged in parallel and connected to the oil circuit of the bulldozer cylinder. The hydraulic sequence valve is connected to the oil circuit of the slide cylinder.

3. The compression garbage truck loading system according to claim 2, characterized in that: The bulldozer cylinder is a three-stage telescopic cylinder, and the number of the overflow valves is 3, namely a first-stage overflow valve, a second-stage overflow valve and a third-stage overflow valve, wherein the overflow pressure of the first-stage overflow valve is smaller than that of the second-stage overflow valve, the overflow pressure of the second-stage overflow valve is smaller than that of the third-stage overflow valve, the first-stage overflow valve is connected in series with a first normally closed switch, and the second-stage overflow valve is connected in series with a second normally closed switch.

4. The compression garbage truck loading system according to claim 3, characterized in that: The trash bin is divided into a first-level position interval, a second-level position interval and a third-level position interval in sequence toward the rear of the vehicle; When the position detection unit detects that the push blade is in the third position range, the first normally closed switch and the second normally closed switch are both closed, thereby connecting the oil circuit between the third-level relief valve and the push blade cylinder; When the position detection unit detects that the push blade is in the second-stage position interval, only the second normally closed switch is opened, thereby connecting the oil circuit between the secondary relief valve and the push blade cylinder; When the position detection unit detects that the push blade is in the first position interval, only the first normally closed switch is opened to connect the oil circuit between the first-level relief valve and the push blade cylinder.

5. The compression garbage truck loading system according to claim 1, characterized in that: It also includes a display unit, and the control unit is used to calculate the loading amount of garbage in the garbage bin according to the position information of the dozer, and display the loading amount through the display unit.

6. A method for controlling loading of a compression garbage truck, characterized in that: The method comprises: During the process of the skateboard compressing the garbage, the oil pressure information of the skateboard cylinder and the position information of the shovel in the garbage bin are detected; The push-blade valve is controlled to be opened or closed according to the oil pressure information, and the back pressure of the push-blade cylinder is adjusted in real time according to the position information.

7. The loading control method of a compression garbage truck according to claim 6, characterized in that: The step of controlling the bulldozer valve to open or close according to the oil pressure information comprises: When it is detected that the oil pressure information is less than or equal to the preset oil pressure, the dozer valve is controlled to be closed; When it is detected that the oil pressure information is greater than the preset oil pressure, the dozer valve is controlled to open.

8. The loading control method of a compression garbage truck according to claim 6, characterized in that: The trash bin is divided into a first-level position interval, a second-level position interval and a third-level position interval in sequence toward the rear of the vehicle; The step of adjusting the back pressure of the push shovel cylinder according to the position information comprises: When it is detected that the push shovel is in the third position interval, the back pressure of the push shovel cylinder is adjusted to P1; When it is detected that the push shovel is in the second position interval, adjusting the back pressure of the push shovel cylinder to P2; When it is detected that the push shovel is in the first position interval, adjusting the back pressure of the push shovel cylinder to P3; Among them, P1 is greater than P2, and P2 is greater than P3.

9. The loading control method of a compression garbage truck according to claim 6, characterized in that: After the step of controlling the opening or closing of the dozer valve according to the oil pressure information and adjusting the back pressure of the dozer cylinder in real time according to the position information, the method further includes: The loading amount of the garbage in the garbage bin is calculated according to the position information of the push shovel, and the loading amount is displayed through a display unit.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a plurality of instructions, and the instructions are suitable for being loaded by a processor to execute the loading control method of a compression garbage truck as described in any one of claims 6 to 9.

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