Automatic spiral sealing discharge control system and method for kitchen garbage truck

Abstract

The invention discloses an automatic spiral sealing discharging control system and method for a kitchen garbage truck. The automatic spiral sealing discharging control system comprises an oil tank, an oil pump, a pressure sensor, a linkage electromagnetic valve, an auger electromagnetic valve, a push shovel oil cylinder, a gate valve oil cylinder and a controller. The push shovel oil cylinder, the auger electromagnetic valve and the gate valve oil cylinder are connected to a circulating oil way formed by the oil tank and the oil pump in parallel. The linkage electromagnetic valve is connected between the push shovel oil cylinder and the auger motor in parallel, and the pressure sensor is used for detecting the pressure of the push shovel. Hydraulic control capable of being freely switched between series connection and parallel connection is adopted, and when the kitchen garbage truck is in a spiral sealing discharging mode, the push shovel and the auger are required to be capable of acting independently and acting in a combined mode, and the speeds of the push shovel and the auger can be associated. In addition, the invention provides control logic for automatic spiral sealing discharge of the kitchen truck.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic systems for food garbage trucks, and in particular to an automatic spiral seal discharging control method for food garbage trucks. Background Art

[0002] The discharge modes of food waste trucks are divided into push shovel discharge, spiral seal discharge, box tipping discharge, pneumatic discharge, etc. However, currently on the market, regardless of the discharge mode, the vehicle is basically a manual discharge mode. In the spiral seal discharge mode, the box is in a closed state, and it is difficult to observe and accurately control the discharge process in manual mode, which can easily cause hidden dangers such as blockage and deformation of the box due to long-term pressure. Summary of the invention

[0003] The object of the present invention is to provide an automatic spiral seal discharging control method for a food garbage truck to solve the problems raised in the above background technology.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: an automatic spiral seal discharging control system for a kitchen garbage truck, comprising an oil tank, an oil pump, a pressure sensor, a linkage solenoid valve, an auger solenoid valve, a shovel oil cylinder, a gate valve oil cylinder and a controller:

[0005] The push shovel cylinder, auger motor and gate valve cylinder are connected in parallel on the circulating oil circuit formed by the oil tank and the oil pump;

[0006] The linkage solenoid valve is connected in parallel between the dozer cylinder and the auger motor, and the pressure sensor is used to detect the dozer pressure.

[0007] Preferably, it also includes a unloading solenoid valve, which is connected to the delivery circuit between the oil pump and the oil tank.

[0008] Preferably, it also includes a bulldozer solenoid valve, an auger solenoid valve and a gate valve solenoid valve.

[0009] Preferably, a gate valve open position proximity switch, a gate valve closed position proximity switch and a bulldozer received position proximity switch are installed at a specific position.

[0010] A method for controlling automatic spiral seal discharging of a kitchen garbage truck comprises the following steps:

[0011] Step 1: Gate valve opening: The controller controls the unloading solenoid valve coil 1DT and the gate valve solenoid valve coil 8DT to be energized, the oil pump suction port draws hydraulic oil from the oil tank, and the pressure oil from the oil pump pressure port passes through the right position of the gate valve solenoid valve and the hydraulic lock into the gate valve cylinder rod chamber oil port A3 to drive the gate valve to open;

[0012] Step 2: When the auger is turned on and the motor speed rises to the speed set by the controller, the auger automatically rotates for A seconds. The specific control process is as follows: the oil pump suction port draws hydraulic oil from the oil tank, and the pressure oil from the oil pump pressure port enters the auger motor oil port B2 through the left position of the auger solenoid valve to drive the auger to rotate; at the same time, the hydraulic oil from the auger motor oil port A2 returns to the oil tank through the right position of the linkage solenoid valve and the left position of the auger solenoid valve;

[0013] Step 3: After the auger has completed its work for A seconds, the auger and the dozer are turned on simultaneously for B seconds;

[0014] Step 4: The pressure sensor has a preset value PS. When its detection value is greater than PS, a signal is sent to the controller to control the dozer to stop and the auger to continue to start for C seconds before stopping.

[0015] Step 5: Retract the bulldozer and close the gate valve.

[0016] Preferably, the control process for simultaneously starting the auger and the bulldozer is as follows: the oil pump suction port draws hydraulic oil from the fuel tank, the pressure oil from the oil pump pressure port passes through the left position of the auger solenoid valve and enters the auger motor oil port B2 to drive the auger to rotate, and the hydraulic oil from the auger motor oil port A2 passes through the left position of the linkage solenoid valve and enters the rodless chamber oil port A1 of the bulldozer cylinder to drive the bulldozer to be pushed out; at the same time, the hydraulic oil from the rod chamber oil port B1 of the bulldozer cylinder passes through the left position of the auger solenoid valve and returns to the fuel tank.

[0017] Preferably, when the bulldozer pressure is lower than the set value PS, steps 2 and 3 are repeated until the bulldozer is pushed into place.

[0018] Preferably, when the bulldozer pressure is higher than the set value PS: the pressure sensor delays 3s to detect the bulldozer pressure again. If the pressure becomes lower, continue with step three; if the pressure is still higher than the set value PS, the pressure sensor sends a signal and automatically starts step four.

[0019] Preferably, the control steps of step five are: the controller controls the bulldozer solenoid valve coil 2DT to lose power according to the detection signal of the proximity switch received by the bulldozer, and the bulldozer stops moving. At the same time, the oil pump suction port draws hydraulic oil from the oil tank, and the pressure oil from the oil pump pressure port passes through the left position of the gate valve solenoid valve and the hydraulic lock into the rodless chamber oil port B3 of the gate valve cylinder to drive the gate valve to extend; at the same time, the hydraulic oil from the rod chamber oil port A3 of the gate valve cylinder passes through the hydraulic lock and the left position of the gate valve solenoid valve back to the oil tank.

[0020] Preferably, it also includes a preparation step: high voltage power is turned on, the motor drives the oil pump to be in a low-speed standby state, the oil pump suction port draws hydraulic oil from the oil tank, and the pressure oil at the oil pump pressure port directly returns to the oil tank through the right position of the unloading solenoid valve.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention adopts a hydraulic control that can be switched freely between series and parallel, and realizes that in the spiral seal discharge mode of the restaurant garbage truck, the push shovel and the auger can move independently and in combination, and the speeds of the two can be related. In addition, a control logic for automatic spiral seal discharge of the restaurant garbage truck is provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0024] In the figure: 1: oil tank, 2: oil pump, 3: pressure sensor, 4: unloading solenoid valve, 5: safety valve, 6: bulldozer solenoid valve, 7: linkage solenoid valve, 8: pressure limiting valve, 9: auger solenoid valve, 10: gate valve solenoid valve, 11: bulldozer cylinder, 12: auger motor, 13: gate valve cylinder, 14: hydraulic lock, 15: gate valve open position proximity switch, 16: gate valve closed position proximity switch, 17: bulldozer received position proximity switch. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figure 1 As shown, 1. Preparation stage: high voltage is powered on, the motor drives the oil pump 2 to be in a low-speed standby state, the oil suction port of the oil pump 2 draws hydraulic oil from the oil tank 1, and the pressure oil at the oil pressure port of the oil pump 2 passes through the right position of the unloading solenoid valve 4 and directly returns to the oil tank 1. In this state, the energy loss of the hydraulic system is very small, and the system is more energy-saving and environmentally friendly.

[0027] 2. Operation stage: Press the [Spiral Seal Discharge] button on the control panel, the [Spiral Seal Discharge] status light will light up, and the system will enter the automatic control stage.

[0028] 1. Gate valve opening: The controller controls the solenoid coils 1DT and 8DT to be energized, and the motor speed is 800r / min. The oil pump 2 suction port draws hydraulic oil from the oil tank 1, and the pressure oil of the oil pump 2 pressure port passes through the gate valve solenoid valve 10 right position and the hydraulic lock 14 to enter the gate valve cylinder 13 rod chamber oil port A3 to drive the gate valve to open; at the same time, the hydraulic oil of the gate valve cylinder 13 rodless chamber oil port B3 passes through the hydraulic lock 14 and the gate valve solenoid valve 10 right position to return to the oil tank 1. This process controls the gate valve to open. When the gate valve is fully opened, the gate valve fully opened proximity switch 15 detects a signal, indicating that the gate valve is fully opened automatically.

[0029] 2. The auger is turned on for 40 seconds: The controller controls the electromagnetic coil 8DT to lose power according to the detection signal of the proximity switch 15 when the gate valve is fully opened, and the gate valve stops moving. At the same time, the controller controls the electromagnetic coils 1DT and 5DT to be energized, and the motor speed is 1400r / min. The oil suction port of the oil pump 2 draws hydraulic oil from the oil tank 1, and the pressure oil of the oil pressure port of the oil pump 2 enters the oil port B2 of the auger motor 12 through the left position of the auger solenoid valve 9 to drive the auger to rotate; at the same time, the hydraulic oil of the oil port A2 of the auger motor 12 passes through the right position of the linkage solenoid valve 7 and the left position of the auger solenoid valve 9 and returns to the oil tank 1. This process is a parallel control loop. While controlling the rotation of the auger, the controller counts. When the count reaches 40s, it means that the automatic rotation of the auger for 40s is completed.

[0030] 3. The auger and the bulldozer are turned on for 20 seconds at the same time: the controller counts for 40 seconds, indicating that the auger has completed the automatic rotation of 40 seconds, and the control solenoid coils 1DT, 5DT, and 4DT are energized, and the motor speed is 1400r / min. The suction port of the oil pump 2 draws hydraulic oil from the oil tank 1, and the pressure oil of the oil pump 2 pressure port enters the oil port B2 of the auger motor 12 through the left position of the auger solenoid valve 9 to drive the auger to rotate. The hydraulic oil of the oil port A2 of the auger motor 12 enters the rodless cavity oil port A1 of the bulldozer oil cylinder 11 through the left position of the linkage solenoid valve 7 to drive the bulldozer to push out; at the same time, the hydraulic oil of the rod cavity oil port B1 of the bulldozer oil cylinder 11 returns to the oil tank 1 through the left position of the auger solenoid valve 9. This process is a series control loop. While controlling the rotation of the auger and the pusher to push out, the pressure sensor 3 detects the bulldozer pressure and the controller counts. The pressure sensor 3 has a preset value PS. When its detection value is greater than PS, it sends a signal to the controller.

[0031] 3.1. When the pressure of the push shovel is lower than the set value PS: the controller counts to 20s, indicating that the auger and push shovel are turned on for 20s at the same time, and then the second and third steps are restarted (auger is turned on for 40s), and this is repeated three times, and the time setting and the number of reciprocating times need to ensure that the push shovel can be pushed into place. After the push shovel is pushed into place, the pressure of the push shovel must be higher than the set value PS, and then work is carried out according to step 3.2.

[0032] 3.2. When the bulldozer pressure is higher than the set value PS: the pressure sensor 3 delays 3s to detect the bulldozer pressure again. If the pressure becomes lower (lower than the set value PS), continue with step 3 (the auger and bulldozer are turned on at the same time for 20s); if the pressure is still higher than the set value PS, the pressure sensor 3 sends a signal and automatically starts the step 4.

[0033] 4. The bulldozer stops and the auger starts for 26 seconds: The controller controls the electromagnetic coil 4DT to lose power according to the detection signal of the pressure sensor 3, and the bulldozer stops. At the same time, the controller controls the electromagnetic coils 1DT and 5DT to be energized, and the motor speed is 1400r / min. The oil suction port of the oil pump 2 draws hydraulic oil from the oil tank 1, and the pressure oil of the oil pressure port of the oil pump 2 enters the oil port B2 of the auger motor 12 through the left position of the auger solenoid valve 9 to drive the auger to rotate; at the same time, the hydraulic oil of the oil port A2 of the auger motor 12 passes through the right position of the linkage electromagnetic valve 7 and the left position of the auger solenoid valve 9 and returns to the oil tank 1. This process is a parallel control loop. While controlling the rotation of the auger, the controller counts. When the count reaches 26 seconds, it means that the automatic rotation of the auger for 26 seconds is completed.

[0034] 5. Auger stop and dozer retract: The controller counts to 26 seconds, indicating that the dozer stop and auger start work for 26 seconds are completed, and the control solenoid coil 5DT is de-energized, and the auger stops. At the same time, the controller controls the solenoid coils 1DT and 2DT to be energized, and the motor speed is 1400r / min. The oil suction port of the oil pump 2 draws hydraulic oil from the oil tank 1, and the pressure oil of the oil pressure port of the oil pump 2 enters the rod chamber oil port B1 of the dozer cylinder 11 through the left position of the dozer solenoid valve 6 to drive the dozer to retract; at the same time, the hydraulic oil of the rodless chamber oil port A1 of the dozer cylinder 11 passes through the left position of the dozer solenoid valve 6 and returns to the oil tank 1. This process is a parallel control loop, which controls the dozer to retract. When the dozer is received in place, the dozer received in place proximity switch 17 detects a signal, indicating that the dozer is automatically received in place.

[0035] 6. Stop the bulldozer and close the gate valve: The controller controls the electromagnetic coil 2DT to lose power according to the detection signal of the bulldozer proximity switch 17, and the bulldozer stops. At the same time, the controller controls the electromagnetic coils 1DT and 7DT to be energized, and the motor speed is 800r / min. The oil suction port of the oil pump 2 draws hydraulic oil from the oil tank 1, and the pressure oil of the oil pressure port of the oil pump 2 passes through the left position of the gate valve solenoid valve 10 and the hydraulic lock 14 to enter the rodless chamber oil port B3 of the gate valve cylinder 13 to drive the gate valve to extend; at the same time, the hydraulic oil of the rod chamber oil port A3 of the gate valve cylinder 13 passes through the hydraulic lock 14 and the left position of the gate valve solenoid valve 10 to return to the oil tank 1. This process controls the gate valve to close. When the gate valve is closed in place, the gate valve closed in place proximity switch 16 detects a signal, indicating that the gate valve is automatically closed in place.

[0036] 7. Gate valve stop: The controller controls the electromagnetic coils 1DT and 7DT to lose power and the motor to standby at low speed according to the detection signal of the gate valve being closed in place proximity switch 16. This process controls the gate valve to stop moving, and all actions are completed.

[0037] 3. Emergency stop: During the operation phase, press the [Emergency Stop] button or press the [Spiral Seal Discharge] button again, the controller controls all electromagnet coils to lose power, the motors to standby at low speed, and all actions are terminated directly.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic spiral seal discharge control system for a kitchen garbage truck, characterized in that: It comprises an oil tank (1), an oil pump (2), a pressure sensor (3), a linkage solenoid valve (7), an auger solenoid valve (9), a push shovel oil cylinder (11), a gate valve oil cylinder (13) and a controller: The push shovel oil cylinder (11), the auger motor (12) and the gate valve oil cylinder (13) are connected in parallel to a circulating oil circuit formed by the oil tank (1) and the oil pump (2); The linkage electromagnetic valve (7) is connected in parallel between the push blade oil cylinder (11) and the auger motor (12), and the pressure sensor (3) is used to detect the push blade pressure.

2. The automatic spiral seal discharge control system for a food waste truck according to claim 1, characterized in that: It also includes a unloading electromagnetic valve (4), which is connected to the delivery circuit between the oil pump (2) and the oil tank (1).

3. The automatic spiral seal discharge control system for a food waste truck according to claim 1, characterized in that: It also includes a bulldozer solenoid valve (6), an auger solenoid valve (9) and a gate valve solenoid valve (10).

4. The automatic spiral seal discharge control system for a food waste truck according to claim 1, characterized in that: A gate valve open position proximity switch (15), a gate valve closed position proximity switch (16) and a push shovel received position proximity switch (17) are installed at a specific position.

5. A method for controlling automatic spiral seal discharging of a kitchen garbage truck, characterized in that: The automatic spiral seal discharge control system for a food waste truck as claimed in any one of claims 1 to 4 is adopted, comprising the following steps: Step 1: Gate valve opening: The controller controls the coil 1DT of the unloading solenoid valve (4) and the coil 8DT of the gate valve solenoid valve (10) to be energized, and the oil suction port of the oil pump (2) draws hydraulic oil from the oil tank (1). The pressure oil of the oil pressure port of the oil pump (2) passes through the right position of the gate valve solenoid valve (10) and the hydraulic lock (14) and enters the rod chamber oil port A3 of the gate valve cylinder (13) to drive the gate valve to open; Step 2: When the auger is turned on and the motor speed rises to the speed set by the controller, the auger automatically rotates for A seconds. The specific control process is as follows: the oil pump (2) draws hydraulic oil from the oil tank (1) through the oil suction port, and the pressure oil from the oil pressure port of the oil pump (2) enters the oil port B2 of the auger motor (12) through the left position of the auger solenoid valve (9) to drive the auger to rotate; at the same time, the hydraulic oil from the oil port A2 of the auger motor (12) returns to the oil tank (1) through the right position of the linkage solenoid valve (7) and the left position of the auger solenoid valve (9); Step 3: After the auger has completed its work for A seconds, the auger and the dozer are turned on simultaneously for B seconds; Step 4: The pressure sensor (3) has a preset value PS. When the detected value is greater than PS, a signal is sent to the controller to stop the dozer and continue to operate the auger. 秒 Then stop; Step 5: Retract the bulldozer and close the gate valve.

6. The automatic spiral seal discharging control method of a food waste truck according to claim 1, characterized in that: The control process of simultaneously starting the auger and the bulldozer is as follows: the oil pump (2) suction port draws hydraulic oil from the oil tank (1), the pressure oil from the oil pump (2) pressure port passes through the auger solenoid valve (9) position and enters the oil port B2 of the auger motor (12) to drive the auger to rotate, the hydraulic oil from the oil port A2 of the auger motor (12) passes through the left position of the linkage solenoid valve (7) and enters the rodless chamber oil port A1 of the bulldozer cylinder (11) to drive the bulldozer to push out; at the same time, the hydraulic oil from the rod chamber oil port B1 of the bulldozer cylinder (11) passes through the left position of the auger solenoid valve (9) and returns to the oil tank (1).

7. The automatic spiral seal discharging control method of a food waste truck according to claim 5, characterized in that: When the bulldozer pressure is lower than the set value PS, repeat steps 2 and 3 until the bulldozer is in place.

8. The automatic spiral seal discharging control method of a food waste truck according to claim 5, characterized in that: When the pressure of the dozer blade is higher than the set value PS, the pressure sensor (3) delays 3 seconds and detects the pressure of the dozer blade again. If the pressure becomes lower, the step 3 action is continued; if the pressure is still higher than the set value PS, the pressure sensor (3) sends a signal and automatically starts the step 4 action.

9. The automatic spiral seal discharging control method of a food waste truck according to claim 5, characterized in that: The control steps of step five are as follows: the controller controls the coil 2DT of the push blade solenoid valve (6) to lose power according to the detection signal received by the push blade proximity switch (17), and the push blade stops moving. At the same time, the oil pump (2) suction port draws hydraulic oil from the oil tank (1), and the pressure oil of the oil pump (2) pressure port passes through the gate valve solenoid valve (10) left position and the hydraulic lock (14) to enter the rodless chamber oil port B3 of the gate valve cylinder (13) to drive the gate valve to extend; at the same time, the hydraulic oil of the rod chamber oil port A3 of the gate valve cylinder (13) passes through the hydraulic lock (14) and the gate valve solenoid valve (10) left position and returns to the oil tank (1).

10. The automatic spiral seal discharging control method of a food waste truck according to claim 5, characterized in that: The method also includes the following preparation steps: the high voltage is powered on, the motor drives the oil pump (2) to be in a low-speed standby state, the oil suction port of the oil pump (2) draws hydraulic oil from the oil tank (1), and the pressure oil at the oil pressure port of the oil pump (2) passes through the unloading solenoid valve (4) to the right position and directly returns to the oil tank (1).

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