Garbage compression cycle method, garbage pushing method, and pre-press garbage compressor

Abstract

This application relates to the technical field of waste compression equipment, disclosing a waste compression cycle method, a waste pushing method, and a pre-compression waste compressor. In the waste compression cycle method, when the oil supply pressure is greater than P2, the large pump first drives the pushing cylinder assembly to extend. When the oil supply pressure rises and exceeds P3, the operation of the large pump smoothly switches to that of the small pump within time t0, while simultaneously raising the pressure of the second electrically controlled pressure regulating valve to P4. This improves working efficiency, and the smooth switching process between the large and small pumps reduces switching shock and prevents motor damage. In the waste pushing method, during the process of the auxiliary pusher cylinder driving the auxiliary pusher head to extend, the electrically controlled pressure regulating valve assembly gradually reduces from the maximum preset pressure value to the minimum preset pressure value. This satisfies the high thrust requirement of the auxiliary pusher cylinder in the early stage of its stroke, while also meeting the stability requirements of the auxiliary pusher cylinder in the later stage of its stroke, preventing instability and bending when the auxiliary pusher cylinder extends.

Description

Technical Field

[0001] This application relates to the field of waste compression equipment technology, specifically to a waste compression and circulation method, a waste pushing method, and a pre-compression waste compressor. Background Technology

[0002] In the process of handling household waste, it is necessary to first collect the waste from various streets by collection vehicles, and then transport it to designated waste treatment sites for compression processing, such as compressing the waste into blocks. The block-shaped waste is then transferred to incineration plants or landfills by transfer vehicles.

[0003] The commonly used horizontal pre-compression garbage compactor's complete working process includes casing docking, compression cycle, material packaging, and casing separation. The compression cycle, which takes the longest, is the key process determining the compactor's processing efficiency. The compression cycle is defined as: the pusher reciprocates, pushing garbage from the receiving hopper into the compression chamber for compression. Material packaging is defined as: the main and auxiliary pushers relay the compressed garbage into the garbage truck. Initially, the auxiliary pusher requires a larger pushing force, which gradually decreases as the garbage is pushed into the garbage bin.

[0004] In existing horizontal pre-compression garbage compactors, the main pressure regulating oil circuit in the hydraulic system controlling the compression cycle and material packaging typically uses a single-stage on / off relief valve. Therefore, the switching control of the dual pumps (large and small pumps) on the oil supply line can only be achieved by setting one or two pressure values ​​for this on / off relief valve via a mechanical pressure regulating handle. Once the pressure is set, it cannot be modified through the control program. This leads to the risk of overload damage to the motor driving the dual pumps during the compression cycle, and also results in significant pressure shocks during the switching process. Similarly, for the material packaging process using a single-stage on / off relief valve, the pressure of the auxiliary pusher cylinder cannot be adjusted in real time during material pushing. If the initial pressure setting of the on / off relief valve is too low, the material may not be pushed initially. If the pushing requirements are met, there is a risk of cylinder instability and bending after the auxiliary pusher cylinder has extended its stroke. Summary of the Invention

[0005] The purpose of this application is to provide a waste compression and circulation method, a waste pushing method, and a pre-compression waste compressor, in order to solve the problems in the prior art that the use of a single-stage on / off overflow valve leads to overload damage to the motor driving the dual pump, pressure shock during the switching process of the dual pump, and the risk of instability and bending of the auxiliary push cylinder.

[0006] To achieve the above objectives, in a first aspect, this application provides a waste compression and circulation method applied to a pre-compression waste compressor. The pre-compression waste compressor includes a controller, a pusher module, a pusher cylinder assembly, a pressure detector, and a pressure limiting oil circuit module. The pressure limiting oil circuit module includes a dual pump connected to the oil circuit of the pusher cylinder assembly and an electrically controlled pressure regulating valve assembly disposed on the oil supply pipeline of the dual pump. The dual pump has a large pump and a small pump arranged in parallel. The electrically controlled pressure regulating valve assembly includes a first electrically controlled pressure regulating valve corresponding to the large pump and a second electrically controlled pressure regulating valve corresponding to the small pump. The pressure detector is used to detect the oil supply pressure of the pusher cylinder assembly. The pusher cylinder assembly is used to drive the pusher module to move. The controller is electrically connected to the pressure detector, the first electrically controlled pressure regulating valve, the second electrically controlled pressure regulating valve, and the dual pump.

[0007] The waste compression and recycling method includes:

[0008] S100: The compression cycle begins, and the large pump and the small pump jointly drive the pusher cylinder assembly to push out.

[0009] S110: When the oil supply pressure increases and exceeds P2, control the second electronically controlled pressure regulating valve to de-energize and stop the small pump, and drive the pusher cylinder group to push out through the large pump;

[0010] S120: When the oil supply pressure increases and exceeds P3, the pressure of the second electronically controlled pressure regulating valve is increased to P4 within time t0, and the pressure of the first electronically controlled pressure regulating valve is reduced to 0 within time t0, and the pump is switched to drive the pusher cylinder group to push out.

[0011] S130: Maintain the operation of the small pump until one compression cycle is completed.

[0012] As a further improvement to the above technical solution:

[0013] In one possible implementation, step S100 includes:

[0014] S101: Start the compression cycle, and the large pump and the small pump drive the pusher cylinder group to push out differentially;

[0015] S102: When the oil supply pressure increases and exceeds P1, the pusher cylinder combination is driven by the large pump and the small pump to push out the oil.

[0016] In one possible implementation, step S130 includes:

[0017] S131: When the oil supply pressure increases and reaches P4, the pusher cylinder group enters the pressure holding state;

[0018] S132: After holding pressure for time t1, the pusher cylinder assembly retracts and resets, completing one compression cycle.

[0019] In one possible implementation, the first electrically controlled pressure regulating valve and the second electrically controlled pressure regulating valve are proportional relief valves or multi-stage on / off relief valves.

[0020] In one possible implementation, the pusher module includes a main pusher and a secondary pusher;

[0021] The pusher cylinder assembly includes:

[0022] The main hydraulic cylinder is used to drive the main push head and the auxiliary push head to move synchronously; and

[0023] A secondary pusher cylinder is used to drive the movement of the secondary pusher head.

[0024] In one possible implementation, the pusher module is a single pusher structure.

[0025] To achieve the above objectives, in a second aspect, this application also provides a waste pushing method applied to a pre-compression waste compressor. The pre-compression waste compressor includes a controller, a pusher module, a pushing cylinder assembly, and a pressure limiting oil circuit module. The pusher module includes a main pusher and an auxiliary pusher. The pushing cylinder assembly includes a main pusher connected to the main pusher and an auxiliary pusher connected to the auxiliary pusher. The pressure limiting oil circuit module includes a dual pump connected to the oil circuit of the pushing cylinder assembly and an electrically controlled pressure regulating valve assembly disposed on the oil supply pipeline of the dual pump. The controller is electrically connected to the electrically controlled pressure regulating valve assembly.

[0026] The waste pushing method includes:

[0027] S200: The main pusher head and the auxiliary pusher head are driven to push out together by the main pusher cylinder;

[0028] S210: When the main push cylinder reaches its maximum extension stroke, adjust the electronically controlled pressure regulating valve group to the maximum preset pressure value and start the auxiliary push cylinder to drive the auxiliary push head to extend.

[0029] S220: During the process of the auxiliary push cylinder driving the auxiliary push head to push out, the electronically controlled pressure regulating valve group is gradually reduced from the maximum preset pressure value to the minimum preset pressure value;

[0030] S230: Control the main pusher head and the auxiliary pusher head to retract and reset.

[0031] As a further improvement to the above technical solution:

[0032] In one possible implementation, the electrically controlled pressure regulating valve assembly is a proportional relief valve or a multi-stage on / off relief valve.

[0033] To achieve the above objectives, in a third aspect, this application also provides a pre-compressed garbage compressor, including a controller, a pusher module, a pusher cylinder assembly, a pressure detector, and a pressure limiting oil circuit module;

[0034] The pressure limiting oil circuit module includes a dual pump connected to the oil circuit of the pusher cylinder group and an electrically controlled pressure regulating valve group installed on the oil supply pipeline of the dual pump. The dual pump has a large pump and a small pump installed in parallel. The electrically controlled pressure regulating valve group includes a first electrically controlled pressure regulating valve corresponding to the large pump and a second electrically controlled pressure regulating valve corresponding to the small pump.

[0035] The pressure detector is used to detect the oil supply pressure of the pusher cylinder assembly;

[0036] The pusher cylinder assembly is used to drive the pusher module to move;

[0037] The controller is electrically connected to the pressure detector, the first electrically controlled pressure regulating valve, the second electrically controlled pressure regulating valve, and the dual pump.

[0038] As a further improvement to the above technical solution:

[0039] In one possible implementation, the pusher module includes a main pusher and a secondary pusher;

[0040] The pusher cylinder assembly includes:

[0041] The main hydraulic cylinder is used to drive the main push head and the auxiliary push head to move synchronously; and

[0042] A secondary pusher cylinder is used to drive the movement of the secondary pusher head.

[0043] Compared to existing technologies, the beneficial effects of this application are:

[0044] This application provides a waste compression cycle method, a waste pushing method, and a pre-compression waste compressor. In the waste compression cycle method, when the oil supply pressure is greater than P2, the large pump first drives the pushing cylinder assembly to push out the material. When the oil supply pressure rises and exceeds P3, the operation of the large pump smoothly switches to that of the small pump within time t0, while simultaneously raising the pressure of the second electrically controlled pressure regulating valve to P4. Since the large pump has higher efficiency, this method improves overall efficiency and reduces switching shock by allowing the large pump to operate independently before smoothly switching to the small pump. It also effectively avoids the situation where, due to system response delay, switching directly to the small pump at P3 would result in both the large and small pumps operating simultaneously, causing the oil supply pressure to reach P3 and resulting in severe overload of the dual-pump motor, thus preventing motor damage.

[0045] In the waste pushing method, during the process of the auxiliary pusher head being pushed out by the auxiliary pusher cylinder, the electronically controlled pressure regulating valve group is gradually reduced from the maximum preset pressure value to the minimum preset pressure value. On the one hand, this can meet the high thrust (high pressure) requirement of the auxiliary pusher cylinder in the early stage of the stroke, and on the other hand, it can meet the stability (low pressure) requirement of the auxiliary pusher cylinder in the later stage of the stroke. This avoids the instability and bending of the auxiliary pusher cylinder when it extends. The requirements can be met by using a smaller cylinder, which can significantly reduce costs.

[0046] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0047] The accompanying drawings are provided to further illustrate this application and form part of the specification. They are used together with the following detailed description to explain this application. It should be understood that the following drawings only show some embodiments of this application and should not be considered as limiting the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort. In the drawings:

[0048] Figure 1 This paper shows a schematic diagram of the hydraulic circuit of a pre-compressed garbage compressor according to an embodiment of the present application;

[0049] Figure 2 A flowchart of a waste compression cycle method provided in an embodiment of this application is shown;

[0050] Figure 3 This paper shows a schematic diagram of the pressure switching mode curves of the large pump and the small pump in the waste compression and recycling method provided in the embodiments of this application;

[0051] Figure 4 A flowchart of a waste pushing method provided in an embodiment of this application is shown;

[0052] Figure 5 The curve showing the pressure of the auxiliary push cylinder as a function of stroke in the waste pushing method provided in this application embodiment is illustrated.

[0053] Explanation of reference numerals in the attached figures:

[0054] 100. Pushing cylinder assembly; 110. Main pushing cylinder; 120. Auxiliary pushing cylinder;

[0055] 200. Pressure limiting oil circuit module; 210. Dual pump; 211. Main pump; 212. Small pump; 220. Electrically controlled pressure regulating valve assembly; 221. First electrically controlled pressure regulating valve; 222. Second electrically controlled pressure regulating valve;

[0056] 300. Fuel tank. Detailed Implementation

[0057] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the embodiments of this application.

[0058] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0059] In the embodiments of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0060] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0061] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0062] The present application will now be described in detail with reference to the accompanying drawings and exemplary embodiments.

[0063] Example 1

[0064] Please see Figure 1 , Figure 2 and Figure 3 This embodiment provides a waste compression and recycling method, which is applied to a pre-compression waste compressor.

[0065] In this embodiment, the pre-compressed garbage compactor includes a controller, a pusher module, a pusher cylinder assembly 100, a pressure detector, and a pressure-limiting oil circuit module 200. The pressure-limiting oil circuit module 200 includes a dual pump 210 connected to the oil circuit of the pusher cylinder assembly 100 and an electrically controlled pressure regulating valve assembly 220 disposed on the oil supply line of the dual pump 210. The dual pump 210 has a large pump 211 and a small pump 212 arranged in parallel. The electrically controlled pressure regulating valve assembly 220 includes a first electrically controlled pressure regulating valve 221 corresponding to the large pump 211 and a second electrically controlled pressure regulating valve 222 corresponding to the small pump 212. The pressure detector is used to detect the oil supply pressure of the pusher cylinder assembly 100. The pusher cylinder assembly 100 is used to drive the pusher module. The controller is electrically connected to a pressure detector, a first electrically controlled pressure regulating valve 221, a second electrically controlled pressure regulating valve 222, and a dual pump 210. In this way, the controller can adjust the pressure of the first electrically controlled pressure regulating valve 221 and the second electrically controlled pressure regulating valve 222 in real time, and can control the operation of the large pump 211 and the small pump 212 in the dual pump 210.

[0066] Specifically, the waste compression cycle method includes the following steps:

[0067] S100: The compression cycle begins, driven by both the large pump 211 and the small pump 212, which push the material out of the hydraulic cylinder assembly 100. This increases the initial pushing speed.

[0068] S110: When the oil supply pressure increases and exceeds P2, the second electronically controlled pressure regulating valve 222 is de-energized and the small pump 212 is stopped (i.e., the small pump 212 is stopped working at the same time), and the pusher cylinder group 100 is pushed out by the large pump 211.

[0069] S120: When the oil supply pressure increases and exceeds P3, a pressure signal of P4 is sent to the second electrically controlled pressure regulating valve 222 within time t0. Simultaneously, within time t0, the pressure signal of the first electrically controlled pressure regulating valve 221 is reduced to 0, and the pump 212 drives the pusher cylinder assembly 100 to extend (see [reference]). Figure 3 In this way, the smooth switching between the large pump 211 and the small pump 212 is achieved within time t0, which on the one hand ensures the pressure stability of the pusher module, and on the other hand avoids the impact caused by the sudden pressure change during the switching between the large pump 211 and the small pump 212.

[0070] S130: Keep the small pump 212 running until one compression cycle is completed.

[0071] It should be noted that the switching process between the large pump 211 and the small pump 212 meets the requirements for power and pressure continuity.

[0072] Furthermore, step S100 above includes:

[0073] S101: Start the compression cycle, and the pusher cylinder group 100 is differentially pushed out by the large pump 211 and the small pump 212.

[0074] S102: When the oil supply pressure increases and exceeds P1, the large pump 211 and the small pump 212 jointly drive the pusher cylinder group 100 to push out.

[0075] In the differential push-out configuration of the push-out cylinder assembly 100, the hydraulic oil output from the large pump 211 and the small pump 212 directly enters the rodless chamber of the cylinder (the main push cylinder 110 in the push-out cylinder assembly 100), while the hydraulic oil in the rod chamber of the cylinder also directly enters the rodless chamber, resulting in a fast push-out speed. In the combined push-out configuration, the hydraulic oil output from the large pump 211 and the small pump 212 directly enters the rodless chamber of the cylinder, while the hydraulic oil in the rod chamber of the cylinder returns directly to the oil tank 300 and no longer enters the rodless chamber, resulting in a slower push-out speed compared to the differential push-out configuration.

[0076] The above step S130 includes:

[0077] S131: When the oil supply pressure increases and reaches P4, the pusher cylinder assembly 100 enters the pressure holding state.

[0078] S132: After holding pressure for t1 time, the pusher cylinder group 100 retracts and resets, completing one compression cycle.

[0079] The order of P1, P2, P3 and P4 is: P1 < P2 < P3 < P4.

[0080] In this embodiment, the first electrically controlled pressure regulating valve 221 and the second electrically controlled pressure regulating valve 222 are proportional relief valves or multi-stage on / off relief valves. It is understood that the pressure of the proportional relief valve is controlled by a program in the controller. A multi-stage on / off relief valve can achieve similar proportional control by using multiple points.

[0081] In some embodiments, the pusher module includes a main pusher and a secondary pusher. The pusher cylinder assembly 100 includes a main pusher cylinder 110 and a secondary pusher cylinder 120. The main pusher cylinder 110 is used to drive the main pusher and the secondary pusher to move synchronously; the secondary pusher cylinder 120 is used to drive the secondary pusher to move.

[0082] In other embodiments, the pusher module is a single pusher structure, that is, there is only one pusher.

[0083] It should be noted that if a single-stage on / off overflow valve is used, the large pump 211 cannot smoothly switch to independent operation mode during the waste compression cycle. Instead, when the oil supply pressure reaches P3, the small pump 212 directly switches to drive the pusher cylinder group 100 to push out. Thus:

[0084] Click the compression cycle button to start the compression cycle. The large pump 211 and the small pump 212 drive the pusher cylinder group 100 to push out rapidly in a differential manner. When the oil supply pressure gradually increases and exceeds P1, the differential operation ends and the large pump 211 and the small pump 212 drive the pusher cylinder group 100 to push out in a combined manner. When the oil supply pressure continues to increase and exceeds P2, the switch-type overflow valve corresponding to the large pump 211 is de-energized, and the small pump 212 drives the pusher cylinder group 100 to push out. At this time, the pushing speed of the pusher module is relatively slow.

[0085] The relevant calculations are as follows:

[0086] The formula relating motor power, pressure, and flow rate in the pressure limiting oil circuit module 200 is W=P*(q1+q2); where W is the motor power; P is the oil supply pressure; q1 is the flow rate of the large pump 211; and q2 is the flow rate of the small pump 212.

[0087] For a hydraulic system driven by a fixed-frequency motor, the power W, the flow rate q1 of the large pump 211, and the flow rate q2 of the small pump 212 are all constant values. Therefore, the maximum pressure value P2 when the large pump 211 and small pump 212 flow together and advance forward, and the pressure value P3 when the large pump 211 works alone can be calculated, i.e., P2 = W / (q1 + q2); P3 = W / q1.

[0088] Understandably, during the garbage compression process, pressure P2 is a value that is easily reached. After reaching P2, switching to small pump 212 is very slow. If switching to large pump 211 after reaching P2, and then switching back to small pump 212 when reaching P3, the pressure of the on / off relief valve corresponding to large pump 211 needs to be set to be greater than P3. Due to the system response time, the pressure may reach P3 first when large pump 211 and small pump 212 are working together. At this time, the motor driving the dual pump 210 is in a state of severe overload, causing alarm shutdown or even damage to the motor. Furthermore, there is a large pressure shock during the process of switching back to small pump 212 from large pump 211.

[0089] In this embodiment, in the waste compression cycle method, when the oil supply pressure is greater than P2, the large pump 211 first drives the pusher cylinder group 100 to push out. When the oil supply pressure rises and exceeds P3, the operation of the large pump 211 smoothly switches to the operation of the small pump 212 within time t0, while the pressure of the second electronically controlled pressure regulating valve 222 is raised to P4. Since the large pump 211 has higher efficiency, on the one hand, the working efficiency can be improved, and on the other hand, the process of large pump 211 working alone and then smoothly switching between large pump 211 and small pump 212 is added, reducing the switching impact. At the same time, it can effectively avoid the situation where, due to system response delay, when switching directly to the operation of small pump 212 at P3, large pump 211 and small pump 212 participate in the operation at the same time, causing the oil supply pressure to reach P3, which would cause the motor of the dual pump 210 to be in a severely overloaded state, thus preventing motor damage. Therefore, in this embodiment, the same waste processing capacity can be achieved with smaller motors and oil pumps at a lower cost.

[0090] Example 2

[0091] Please see Figure 1 , Figure 4 and Figure 5 This embodiment provides a waste pushing method, which is applied to a pre-compressed waste compressor.

[0092] The pre-compressed garbage compactor includes a controller, a pusher module, a pusher cylinder assembly 100, and a pressure limiting oil circuit module 200. The pusher module includes a main pusher and an auxiliary pusher. The pusher cylinder assembly 100 includes a main pusher cylinder 110 connected to the main pusher and an auxiliary pusher cylinder 120 connected to the auxiliary pusher. The pressure limiting oil circuit module 200 includes a dual pump 210 connected to the oil circuit of the pusher cylinder assembly 100 and an electrically controlled pressure regulating valve assembly 220 installed on the oil supply line of the dual pump 210. The controller is electrically connected to the electrically controlled pressure regulating valve assembly 220.

[0093] In this embodiment, the waste pushing method includes:

[0094] S200: The main pusher head and the auxiliary pusher head are driven to push out together by the main pusher cylinder 110.

[0095] S210: When the main push cylinder 110 reaches its maximum extension stroke, the electronically controlled pressure regulating valve group 220 is adjusted to the maximum preset pressure value, and the auxiliary push cylinder 120 is activated to drive the auxiliary push head out. This ensures that the auxiliary push cylinder 120 has a large thrust in the early stage of its stroke, which is sufficient to push the waste.

[0096] S220: During the process of the auxiliary pusher cylinder 120 driving the auxiliary pusher head to push out, the electronically controlled pressure regulating valve group 220 is gradually reduced from the maximum preset pressure value to the minimum preset pressure value.

[0097] It should be noted that as the garbage is gradually pushed out of the pre-compressed garbage compactor casing, the required thrust to push the garbage gradually decreases. Thus, as the extension stroke of the auxiliary push cylinder 120 increases, the pressure of the electronically controlled pressure regulating valve assembly 220 gradually decreases (see [link to relevant documentation]). Figure 5 This process ensures that the auxiliary push cylinder 120 can push the garbage throughout its entire pushing stroke.

[0098] S230: Controls the main pusher and auxiliary pusher to retract and reset.

[0099] In this embodiment, the electrically controlled pressure regulating valve assembly 220 is a proportional relief valve or a multi-stage on / off relief valve. It is understood that the pressure of the proportional relief valve is controlled by a program in the controller. A multi-stage on / off relief valve can achieve similar proportional control by using multiple points.

[0100] It should be noted that if a single-stage on / off relief valve is used, the pressure settings for both the main push cylinder 110 and the auxiliary push cylinder 120 are fixed and cannot be adjusted in real time during operation. Furthermore, because the piston rod diameter of the main push cylinder 110 is larger, it can withstand higher pressures throughout its stroke without instability. However, the piston rod diameter of the auxiliary push cylinder 120 is relatively smaller, and the thrust it can withstand gradually decreases with the stroke. Therefore, when the on / off relief valve has only one or two fixed control pressures, if the set pressure is too low, it may initially fail to push the material. If the pushing requirements are met, there is a risk of cylinder instability and bending after the auxiliary push cylinder 120 has extended its stroke.

[0101] In contrast, the electrically controlled pressure regulating valve group 220 used in this embodiment can adjust the pressure in real time. In the waste pushing method, during the process of the auxiliary push cylinder 120 driving the auxiliary push head out, as the stroke of the auxiliary push cylinder 120 increases, the electrically controlled pressure regulating valve group 220 is gradually reduced from the maximum preset pressure value to the minimum preset pressure value. On the one hand, it can meet the high thrust (high pressure) requirement of the auxiliary push cylinder 120 in the early stage of the stroke, and on the other hand, it can meet the stability (low pressure) requirement of the auxiliary push cylinder 120 in the later stage of the stroke. This avoids the instability and bending of the auxiliary push cylinder 120 when it extends. A smaller cylinder can meet the requirements, which can significantly reduce costs.

[0102] Example 3

[0103] Please see Figure 1 This embodiment provides a pre-compression garbage compressor, which can be used to compress garbage and push and pack garbage.

[0104] In this embodiment, the pre-compressed garbage compressor includes a controller, a pusher module, a pusher cylinder assembly 100, a pressure detector, and a pressure limiting oil circuit module 200.

[0105] The pressure limiting oil circuit module 200 includes a dual pump 210 connected to the oil circuit of the pusher cylinder group 100 and an electrically controlled pressure regulating valve group 220 disposed on the oil supply pipeline of the dual pump 210. The dual pump 210 has a large pump 211 and a small pump 212 disposed in parallel. The electrically controlled pressure regulating valve group 220 includes a first electrically controlled pressure regulating valve 221 corresponding to the large pump 211 and a second electrically controlled pressure regulating valve 222 corresponding to the small pump 212.

[0106] The pressure detector is used to detect the oil supply pressure of the pusher cylinder assembly 100. The pusher cylinder assembly 100 is used to drive the pusher module. The controller is electrically connected to the pressure detector, the first electrically controlled pressure regulating valve 221, the second electrically controlled pressure regulating valve 222, and the double pump 210.

[0107] Furthermore, the pusher module includes a main pusher and an auxiliary pusher. The pusher cylinder assembly 100 includes a main pusher cylinder 110 and an auxiliary pusher cylinder 120. The main pusher cylinder 110 is used to drive the main pusher and the auxiliary pusher to move synchronously; the auxiliary pusher cylinder 120 is used to drive the auxiliary pusher to move.

[0108] In this embodiment, the first electrically controlled pressure regulating valve 221 and the second electrically controlled pressure regulating valve 222 are proportional relief valves or multi-stage on / off relief valves. It is understood that the pressure of the proportional relief valve is controlled by a program in the controller. A multi-stage on / off relief valve can achieve similar proportional control by using multiple points.

[0109] Optionally, the controller can be selected as a PLC controller.

[0110] Please refer to the following: Figure 2 and Figure 4 The pre-compression garbage compressor provided in this embodiment can use the garbage compression cycle method provided in Embodiment 1 above to compress the garbage and reduce its volume into blocks. Alternatively, it can use the garbage pushing method provided in Embodiment 2 above to push and pack the garbage, transferring the reduced-volume garbage into the compartment of a garbage truck.

[0111] The waste compression and recycling method and the waste pushing method have been described in detail above and will not be repeated here.

[0112] The pre-compression garbage compressor provided in this embodiment also has the following advantages:

[0113] 1. By adopting a proportional pressure regulation method, the hydraulic system of the pre-compressed garbage compressor is simpler, more efficient, and more flexible in control;

[0114] 2. The waste compression and recycling method adopts a proportional control method, which increases the working ratio of the large pump 211 and improves work efficiency;

[0115] 3. In the waste pushing method, the auxiliary pusher cylinder 120 of the auxiliary pusher head adopts the pushing ratio control method, which can ensure the stability of the auxiliary pusher cylinder throughout its entire stroke;

[0116] 4. The pressure value of proportional control can be set and modified in the parameter settings, so it can be adjusted according to the actual working conditions, making the operation more flexible.

[0117] It should be noted that the accompanying drawings in this embodiment... Figure 3 and Figure 5 The curves shown are merely illustrative examples and are not limited to linear curves. They can also be curved or undulating curves. As long as the variation achieves the desired effect, it is within the scope of protection of this patent.

[0118] The optional embodiments of the present application have been described in detail above with reference to the accompanying drawings. However, the embodiments of the present application are not limited to the specific details in the above embodiments. Within the scope of the technical concept of the embodiments of the present application, various simple modifications can be made to the technical solutions of the embodiments of the present application, and these simple modifications all fall within the protection scope of the embodiments of the present application.

[0119] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, the embodiments of this application will not describe the various possible combinations separately.

[0120] Furthermore, various different implementation methods of the embodiments of this application can be combined arbitrarily, as long as they do not violate the spirit of the embodiments of this application, they should also be regarded as the content disclosed in the embodiments of this application.

Claims

1. A waste compression and recycling method, characterized in that, This invention relates to a pre-compression garbage compactor, which includes a controller, a pusher module, a pusher cylinder assembly (100), a pressure detector, and a pressure limiting oil circuit module (200). The pressure limiting oil circuit module (200) includes a dual pump (210) connected to the oil circuit of the pusher cylinder assembly (100) and an electrically controlled pressure regulating valve assembly (220) installed on the oil supply line of the dual pump (210). The dual pump (210) has a large pump (211) and a small pump (212) installed in parallel. The electrically controlled pressure regulating valve... The assembly (220) includes a first electrically controlled pressure regulating valve (221) corresponding to the large pump (211) and a second electrically controlled pressure regulating valve (222) corresponding to the small pump (212). The pressure detector is used to detect the oil supply pressure of the pusher cylinder assembly (100). The pusher cylinder assembly (100) is used to push the pusher module to move. The controller is electrically connected to the pressure detector, the first electrically controlled pressure regulating valve (221), the second electrically controlled pressure regulating valve (222), and the dual pump (210). The waste compression and recycling method includes: S100: Start the compression cycle, and the pusher cylinder group (100) is pushed out by the large pump (211) and the small pump (212); S110: When the oil supply pressure increases and is greater than P2, the second electronically controlled pressure regulating valve (222) is de-energized and the small pump (212) is stopped working at the same time. The large pump (211) drives the pusher cylinder group (100) to push out. S120: When the oil supply pressure increases and is greater than P3, the pressure of the second electronically controlled pressure regulating valve (222) is increased to P4 within time t0, and the pressure of the first electronically controlled pressure regulating valve (221) is reduced to 0 within time t0, and the small pump (212) is switched to drive the pusher cylinder group (100) to push out. S130: Maintain the operation of the small pump (212) until one compression cycle is completed.

2. The waste compression and recycling method according to claim 1, characterized in that, Step S100 includes: S101: Start the compression cycle, and drive the pusher cylinder group (100) to push out differentially through the large pump (211) and the small pump (212); S102: When the oil supply pressure increases and is greater than P1, the large pump (211) and the small pump (212) jointly drive the pusher cylinder group (100) to push out.

3. The waste compression and recycling method according to claim 1, characterized in that, Step S130 includes: S131: When the oil supply pressure increases and reaches P4, the pusher cylinder assembly (100) enters the pressure holding state; S132: After holding pressure for t1 time, the pusher cylinder group (100) retracts and resets, completing one compression cycle.

4. The waste compression and recycling method according to claim 1, characterized in that, The first electrically controlled pressure regulating valve (221) and the second electrically controlled pressure regulating valve (222) are proportional relief valves or multi-stage on / off relief valves.

5. The waste compression and recycling method according to claim 1, characterized in that, The pusher module includes a main pusher and a secondary pusher; The pusher cylinder assembly (100) includes: The main pusher cylinder (110) is used to drive the main pusher head and the auxiliary pusher head to move synchronously. and A secondary pusher cylinder (120) is used to drive the movement of the secondary pusher head.

6. The waste compression and recycling method according to claim 5, characterized in that, The waste compression and recycling method further includes a waste pushing method, which includes: S200: The main pusher head and the auxiliary pusher head are driven to push out together by the main pusher cylinder (110); S210: When the main push cylinder (110) reaches its maximum extension stroke, the electronically controlled pressure regulating valve group (220) is adjusted to the maximum preset pressure value and the auxiliary push cylinder (120) is started to drive the auxiliary push head to extend. S220: During the process of the auxiliary push cylinder (120) driving the auxiliary push head to push out, the electronically controlled pressure regulating valve group (220) is gradually reduced from the maximum preset pressure value to the minimum preset pressure value; S230: Control the main pusher head and the auxiliary pusher head to retract and reset.

7. The waste compression and recycling method according to claim 6, characterized in that, The electrically controlled pressure regulating valve group (220) is a proportional relief valve or a multi-stage on / off relief valve.

8. The waste compression and recycling method according to claim 1, characterized in that, The pusher module is a single pusher structure.

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