High-adaptability hydraulic oil supply system for refuse transfer station

Abstract

The utility model provides a high-adaptability hydraulic oil supply system for a refuse transfer station. The high-adaptability hydraulic oil supply system comprises an oil source; the oil pump device comprises a first oil pump and a second oil pump which are connected with an oil source; the oil supply end P is connected with the first oil pump and the second oil pump through a first oil supply path and a second oil supply path respectively, and the oil supply end P is connected with the corresponding driving oil cylinders; the first oil pump is connected with the oil return end T through a first high-pressure oil way and a first pressure maintaining oil way which are controlled by the first control valve to be switched on and off, and the second oil pump is connected with the oil return end T through a second high-pressure oil way, a second pressure maintaining oil way and a low-pressure oil way which are controlled by the second control valve to be switched on and off. A first high-pressure overflow valve, a second high-pressure overflow valve and a low-pressure overflow valve are arranged on the first high-pressure oil way, the second high-pressure oil way and the low-pressure oil way respectively. The hydraulic oil supply system has six different levels of partial pressure driving modes, has high adaptability to various working modes of the driving oil cylinder of the refuse transfer station, and can save energy and improve efficiency.

Description

Technical Field

[0001] The utility model relates to the field of hydraulic oil supply systems, in particular to a highly adaptable hydraulic oil supply system for a garbage transfer station. Background Art

[0002] The garbage transfer station has the function of compressing garbage into the transfer box through compression equipment. During the entire garbage compression process, several corresponding mechanisms need to be driven by several cylinders to move. For example, the compression cylinder drives the compression parts to compress, the hopper cylinder drives the hopper to flip, etc. Under different working conditions of different cylinders, the required oil supply pressure is also different. For example, when the compression cylinder drives the compression parts to compress, high-pressure oil supply is required to improve the compression effect; when the hopper cylinder drives the hopper to flip, low-pressure oil supply is required to improve the stability of material pouring, etc. Therefore, in order to save fuel consumption, the hydraulic oil supply system should be designed with divided pressure.

[0003] At present, some existing technologies use precision control devices such as frequency converters or servo controllers in the motor to achieve multi-level partial pressure drive, but this will greatly increase the cost of the hydraulic system; others use a double gear pump including a large pump and a small pump in the hydraulic oil supply system, and control the large pump and the small pump to output hydraulic oil at the same time, output hydraulic oil separately, or not output hydraulic oil to achieve partial pressure oil supply. However, this setting makes the hydraulic oil supply system have fewer partial pressure levels and can only be applied to three working modes at most. For the various working modes of garbage transfer stations such as lifting, compression, flipping, and latch opening and closing, the existing hydraulic oil supply system has low adaptability and cannot fully achieve the purpose of energy saving and efficiency improvement.

[0004] The purpose of the present invention is to design a highly adaptable hydraulic oil supply system for a garbage transfer station in view of the problems existing in the above-mentioned prior art. Utility Model Content

[0005] In view of the problems existing in the above-mentioned prior art, the utility model provides a highly adaptable hydraulic oil supply system for a garbage transfer station, which can effectively solve the problems existing in the above-mentioned prior art.

[0006] The technical solution of the utility model is:

[0007] A highly adaptable hydraulic oil supply system for a garbage transfer station, comprising:

[0008] Oil source;

[0009] An oil pump device comprises a first oil pump and a second oil pump connected to the oil source;

[0010] An oil supply end P is connected to the first oil pump and the second oil pump through a first oil supply oil passage and a second oil supply oil passage, respectively, and the oil supply end P is connected to a corresponding driving oil cylinder;

[0011] The oil return end T is connected to the corresponding oil return oil circuit. The first oil pump is connected to the oil return end T through the first high-pressure oil circuit and the first pressure-maintaining oil circuit whose on-off is controlled by the first control valve. The second oil pump is connected to the oil return end T through the second high-pressure oil circuit, the second pressure-maintaining oil circuit and the low-pressure oil circuit whose on-off is controlled by the second control valve. The first high-pressure oil circuit, the second high-pressure oil circuit and the low-pressure oil circuit are respectively provided with a first high-pressure relief valve, a second high-pressure relief valve and a low-pressure relief valve.

[0012] Furthermore, the oil pump device includes a double gear pump and a motor for driving the double gear pump, the double gear pump includes the first oil pump and the second oil pump, the first oil pump and the second oil pump are a large pump and a small pump respectively.

[0013] Furthermore, the second control valve is a small pump multi-way valve including a second high-pressure position, a second pressure-maintaining position, and a low-pressure position, and the small pump multi-way valve includes an oil port A2 connected to the oil inlet end of the second high-pressure relief valve, an oil port B2 connected to the oil outlet end of the second high-pressure relief valve, a locked oil port C2, and an oil port D2 connected to the oil inlet end of the low-pressure relief valve, and the oil outlet end of the second high-pressure relief valve and the oil outlet end of the low-pressure relief valve are respectively connected to the oil return end T; when the small pump multi-way valve is in the second high-pressure position, the oil port A2 is unidirectionally connected to the oil port C2, and the oil port D2 is unidirectionally connected to the oil Port B2, the small pump and the second high-pressure relief valve are connected in sequence to form the second high-pressure oil circuit connected to the oil return end T; when the small pump multi-way valve is in the second pressure-maintaining position, the oil ports A2, B2, C2, and D2 are connected, and the small pump, oil port A2, and oil port B2 are connected in sequence to form the second pressure-maintaining oil circuit connected to the oil return end T; when the small pump multi-way valve is in the low-pressure position, the oil port A2 and the oil port C2 are respectively unidirectionally connected to the oil port D2 and the oil port B2, and the small pump, oil port A2, oil port D2, and the low-pressure relief valve are connected in sequence to form the low-pressure oil circuit connected to the oil return end T.

[0014] Further, the first control valve is a large pump multi-way valve including a first high-pressure position and a first pressure-maintaining position, and the large pump multi-way valve includes an oil port A1 connected to the oil inlet end of the first high-pressure relief valve, an oil port B1 connected to the oil outlet end of the first high-pressure relief valve, a locked oil port C1, and a locked oil port D1; when the large pump multi-way valve is in the first high-pressure position, the oil port A1 and the oil port C1 are respectively unidirectionally connected to the oil ports D1 and B1, and the large pump and the first high-pressure relief valve are connected in sequence to form a first high-pressure oil circuit connected to the oil return end T; when the large pump multi-way valve is in the first pressure-maintaining position, the oil port A1, the oil port B1, the oil port C1, and the oil port D1 are connected, and the large pump, the oil port A1, and the oil port B1 are connected in sequence to form a first pressure-maintaining oil circuit connected to the oil return end T.

[0015] Furthermore, the overflow value of the low-pressure relief valve is smaller than the overflow value of the second high-pressure relief valve. The overflow value of the first high-pressure relief valve is 8MPa-10MPa, the overflow value of the second high-pressure relief valve is 15MPa-17MPa, and the overflow value of the low-pressure relief valve is 20MPa-22MPa.

[0016] Furthermore, a large pump one-way valve and a small pump one-way valve are respectively provided between the large pump and the small pump and the oil supply end P, for controlling the one-way flow of oil toward the oil supply end P. The large pump one-way valve is provided on the first oil supply oil circuit, and the small pump one-way valve is provided between the oil inlet end of the second oil supply oil circuit, the oil inlet end of the second high-pressure relief valve, the intersection of the oil port A2 and the small pump.

[0017] Therefore, the utility model provides the following effects and / or advantages:

[0018] 1. The present application controls the on-off of each oil circuit between the first oil pump and the oil return end T, and the second oil pump and the oil return end T through the first control valve and the second control valve, and adjusts the oil supply pressure of the first oil supply circuit and the second oil supply circuit by changing the overflow value of the overflow valve on different oil circuits, thereby adjusting the driving mode of the driving cylinder. Specifically, there are the following six driving modes: 1. The first high-pressure oil circuit and the second high-pressure oil circuit are connected, and the first oil pump and the second oil pump supply high-pressure oil together; 2. The first high-pressure oil circuit and the second pressure-maintaining oil circuit are connected. The first oil pump is on high pressure oil supply and the second oil pump is on standby to maintain pressure; the first oil pump is on high pressure oil supply and the second oil pump is on low pressure oil supply; the first oil pump is on high pressure oil supply and the second oil pump is on low pressure oil supply; the first oil pump is on pressure maintaining oil supply and the second oil pump is on high pressure oil supply; the first oil pump is on pressure maintaining oil supply and the second oil pump is on standby to maintain pressure; the second oil pump is on pressure maintaining oil supply and the second oil pump is on standby to maintain pressure; the first oil pump is on pressure maintaining oil supply and the second oil pump is on standby to maintain pressure; the first oil pump is on pressure maintaining oil supply and the second oil pump is on standby to maintain pressure. The above structure is set up so that the hydraulic oil supply system has up to six different levels of pressure-dividing driving modes, which can adapt to the driving pressure required by each driving cylinder in the garbage transfer station under different working modes, and has high adaptability to the various working modes of the garbage transfer station such as lifting, compression, flipping, latch opening and closing, so as to achieve the purpose of energy saving and efficiency improvement.

[0019] 2. The present application realizes two pressure-dividing oil supply modes including high pressure and pressure-maintaining for the large pump by controlling the opening and closing of the first high-pressure oil circuit and the first pressure-maintaining oil circuit through the first controller, and realizes three pressure-dividing oil supply modes including high pressure, pressure-maintaining and low pressure for the small pump by controlling the opening and closing of the second high-pressure oil circuit, the second pressure-maintaining oil circuit and the low-pressure oil circuit through the second controller. By dividing the oil supply of the small pump into more levels, the oil supply pressure classification after the large pump and the small pump are combined is made more refined.

[0020] 3. This application uses the setting of a multi-way valve for a small pump to connect the second high-pressure oil circuit, the second pressure-maintaining oil circuit, and the low-pressure oil circuit respectively through the second high-pressure station, the second pressure-maintaining station, and the low-pressure station, so that the second oil supply circuit of the small pump has three pressure-dividing oil supply modes, and fewer oil circuit connection branches, saving the cost of the hydraulic oil supply system. This application uses the setting of a multi-way valve for a large pump to connect the first high-pressure oil circuit and the second high-pressure oil circuit respectively through the first high-pressure station and the first pressure-maintaining station, so that the first oil supply circuit of the large pump has three pressure-dividing oil supply modes, and fewer oil circuit connection branches, saving the cost of the hydraulic oil supply system.

[0021] It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the hydraulic oil supply system. In the figure, the first control valve is in the first high-pressure position, the second control valve is in the second high-pressure position, the first high-pressure oil circuit and the second high-pressure oil circuit are connected, and the first oil pump and the second oil pump supply high-pressure oil together.

[0023] Figure 2 It is a structural schematic diagram of the hydraulic oil supply system. In the figure, the first control valve is in the first pressure maintaining position, the second control valve is in the second pressure maintaining position, the first pressure maintaining oil circuit and the second pressure maintaining oil circuit are connected, and the first oil pump and the second oil pump are on standby for pressure maintenance together.

[0024] Figure 3 It is a structural diagram of the hydraulic oil supply system, in which the first control valve is in the first high-pressure position, the second control valve is in the second low-pressure position, the first high-pressure oil circuit and the low-pressure oil circuit are connected, the first oil pump supplies oil at high pressure, and the second oil pump supplies oil at low pressure.

[0025] Figure 4 This is a structural diagram of the hydraulic oil supply system after being applied to the hydraulic system of the high-level unloading horizontal compression station. DETAILED DESCRIPTION

[0026] In order to facilitate understanding by those skilled in the art, the structure of the present invention is further described in detail with reference to the accompanying drawings:

[0027] refer to Figure 1-4 , a highly adaptable hydraulic oil supply system for a garbage transfer station, comprising:

[0028] Oil source 1;

[0029] An oil pump device 2, comprising a first oil pump 21 and a second oil pump 22 connected to the oil source 1;

[0030] The oil supply end P is connected to the first oil pump 21 and the second oil pump 22 through the first oil supply oil passage 3 and the second oil supply oil passage 4 respectively, and the oil supply end P is connected to the corresponding driving oil cylinder;

[0031] The oil return end T is connected to the corresponding oil return oil circuit. The first oil pump 21 is connected to the oil return end T through the first high-pressure oil circuit and the first pressure-maintaining oil circuit whose on-off is controlled by the first control valve 5. The second oil pump 22 is connected to the oil return end T through the second high-pressure oil circuit, the second pressure-maintaining oil circuit and the low-pressure oil circuit whose on-off is controlled by the second control valve 6. The first high-pressure oil circuit, the second high-pressure oil circuit and the low-pressure oil circuit are respectively provided with a first high-pressure relief valve 7, a second high-pressure relief valve 8 and a low-pressure relief valve 9.

[0032] The above structure is set up to control the on-off of each oil circuit between the first oil pump 21 and the oil return end T, and the second oil pump 22 and the oil return end T through the first control valve 5 and the second control valve 6, and adjust the oil supply pressure of the first oil supply circuit 3 and the second oil supply circuit 4 by changing the overflow value of the overflow valve on different oil circuits, thereby adjusting the driving mode of the driving cylinder. Specifically, there are the following six driving modes: 1. The first high-pressure oil circuit is connected, and the first oil pump 21 and the second oil pump 22 supply high-pressure oil together; 2. The first high-pressure oil circuit and the second pressure-maintaining oil circuit are connected. , the first oil pump 21 supplies oil at high pressure, and the second oil pump 22 maintains pressure and stands by; third, the first high-pressure oil circuit and the low-pressure oil circuit are connected, the first oil pump 21 supplies oil at high pressure, and the second oil pump 22 supplies oil at low pressure; fourth, the first pressure-maintaining oil circuit and the second high-pressure oil circuit are connected, the first oil pump 21 maintains pressure and stands by, and the second oil pump 22 supplies oil at high pressure; fifth, the first pressure-maintaining oil circuit and the second pressure-maintaining oil circuit are connected, and the first oil pump 21 and the second oil pump 22 maintain pressure and stand by together; sixth, the first pressure-maintaining oil circuit and the second low-pressure oil circuit are connected, the first oil pump 21 maintains pressure and stands by, and the second oil pump 22 supplies oil at low pressure. Thus, through the arrangement of the above structure, the hydraulic oil supply system has up to six different levels of pressure-dividing driving modes, which can adapt to the driving pressure required by each driving cylinder in the garbage transfer station under different working modes, and has high adaptability to the various working modes of the garbage transfer station, such as lifting, compression, flipping, latch opening and closing, so as to achieve the purpose of energy saving and efficiency improvement.

[0033] Specifically, in the present embodiment, the garbage transfer station is a high-level unloading horizontal compression station, which specifically includes a scraper driving cylinder for driving the scraper to rotate up or scrape down, a skateboard driving cylinder for driving the skateboard to push out or retract, a hopper driving cylinder for driving the hopper to rise or fall, a compressor driving cylinder for driving the compressor to rise or fall, a lock box driving cylinder for driving the lock box latch to open or close, and a push-pull driving cylinder for driving the transfer box to push out or retract. After the transfer box is pulled into the station by the push-pull driving cylinder, the compressor driving cylinder drives the compressor to descend, the hopper driving cylinder drives the hopper to rise and flip, and then pours the garbage into the transfer box, the skateboard driving cylinder drives the skateboard to push out and drive the scraper to extend, the scraper driving cylinder drives the scraper to scrape down to the front side of the transfer box, the skateboard driving cylinder then drives the skateboard to retract and drive the scraper to move horizontally to compress the garbage in the transfer box, and after the skateboard reciprocates to complete the garbage compression, the lock box driving cylinder drives the lock box latch to close to lock the transfer box. The oil pressure required in different working modes of the above-mentioned driving oil cylinders is not the same. When the hydraulic oil supply system is specifically applied to the high-level unloading horizontal compression station, the working states of each overflow valve and oil pump are shown in Table 1 below:

[0034]

[0035] Table 1

[0036] In order to make the oil supply pressure classification of the first oil pump 21 and the second oil pump 22 more refined, the oil pump device 2 includes a double gear pump and a motor 23 for driving the double gear pump, and the double gear pump includes the first oil pump 21 and the second oil pump 22, and the first oil pump 21 and the second oil pump 22 are respectively a large pump and a small pump. Thus, the first controller controls the opening and closing of the first high-pressure oil circuit and the first pressure-maintaining oil circuit to realize two pressure-dividing oil supply modes including high pressure and pressure-maintaining for the large pump, and the second controller controls the opening and closing of the second high-pressure oil circuit, the second pressure-maintaining oil circuit and the low-pressure oil circuit to realize three pressure-dividing oil supply modes including high pressure, pressure-maintaining and low pressure for the small pump. By dividing the oil supply of the small pump into more levels, the oil supply pressure classification after the large pump and the small pump are combined is made more refined.

[0037] In order to realize the three partial pressure oil supply modes for the small pump, reduce the oil circuit connection branches to save costs, the second control valve 6 is a small pump multi-way valve including a second high-pressure position, a second pressure-maintaining position, and a low-pressure position. The small pump multi-way valve includes an oil port A2 connected to the oil inlet end of the second high-pressure relief valve 8, an oil port B2 connected to the oil outlet end of the second high-pressure relief valve 8, a locked oil port C2, and an oil port D2 connected to the oil inlet end of the low-pressure relief valve 9. The oil outlet end of the second high-pressure relief valve 8 and the oil outlet end of the low-pressure relief valve 9 are respectively connected to the oil return end T; when the small pump multi-way valve is in the second high-pressure position, the oil port A2 is unidirectionally connected to the oil Port C2 and the oil port D2 are unidirectionally connected to the oil port B2, and the small pump and the second high-pressure relief valve 8 are sequentially connected to form the second high-pressure oil circuit connected to the oil return end T; when the small pump multi-way valve is in the second pressure-maintaining position, the oil ports A2, B2, C2, and D2 are connected, and the small pump, the oil port A2, and the oil port B2 are sequentially connected to form the second pressure-maintaining oil circuit connected to the oil return end T; when the small pump multi-way valve is in the low-pressure position, the oil port A2 and the oil port C2 are respectively unidirectionally connected to the oil port D2 and the oil port B2, and the small pump, the oil port A2, the oil port D2, and the low-pressure relief valve 9 are sequentially connected to form the low-pressure oil circuit connected to the oil return end T. Therefore, through the setting of the multi-way valve of the small pump, the second high-pressure oil circuit, the second pressure-maintaining oil circuit and the low-pressure oil circuit are respectively connected through the second high-pressure position, the second pressure-maintaining oil circuit and the low-pressure position, so that the second oil supply circuit 4 of the small pump has three pressure-dividing oil supply modes while having fewer oil circuit connection branches, saving the cost of the hydraulic oil supply system.

[0038] In order to reduce the branches of oil circuit connection to save costs under the premise of realizing two pressure-dividing oil supply modes for the large pump, the first control valve 5 is a large pump multi-way valve including a first high-pressure position and a first pressure-maintaining position, and the large pump multi-way valve includes an oil port A1 connected to the oil inlet end of the first high-pressure relief valve 7, an oil port B1 connected to the oil outlet end of the first high-pressure relief valve 7, a locked oil port C1, and a locked oil port D1; when the large pump multi-way valve is in the first high-pressure position, the oil port A1 and the oil port C1 are unidirectionally connected to the oil ports D1 and B1 respectively, and the large pump and the first high-pressure relief valve 7 are connected in sequence to form a first high-pressure oil circuit connected to the oil return end T; when the large pump multi-way valve is in the first pressure-maintaining position, the oil ports A1, B1, C1, and D1 are connected, and the large pump, the oil port A1, and the oil port B1 are connected in sequence to form a first pressure-maintaining oil circuit connected to the oil return end T. Therefore, by setting the multi-way valve of the large pump, the first high-pressure oil circuit and the second high-pressure oil circuit are respectively connected through the first high-pressure station and the first pressure-maintaining station, so that the first oil supply circuit 3 of the large pump has three pressure-dividing oil supply modes while having fewer oil circuit connection branches, saving the cost of the hydraulic oil supply system.

[0039] Specifically, in this embodiment, the overflow value of the low-pressure relief valve 9 is smaller than the overflow value of the second high-pressure relief valve 8, the overflow value of the first high-pressure relief valve 7 is 8MPa-10MPa, the overflow value of the second high-pressure relief valve 8 is 15MPa-17MPa, and the overflow value of the low-pressure relief valve 9 is 20MPa-22MPa. Preferably, the overflow value of the first high-pressure relief valve 7 is 9MPa, the overflow value of the second high-pressure relief valve 8 is 16MPa, and the overflow value of the low-pressure relief valve 9 is 21MPa, so that the oil pressure of the six partial pressure oil supply modes realized by the combination of the large pump and the small pump can adapt to the oil pressure required by each driving cylinder of the high-level unloading horizontal compression station in different working modes.

[0040] In order to prevent the oil from the oil supply end P from flowing back into the large pump and the small pump, a large pump check valve 211 and a small pump check valve 221 for controlling the one-way flow of oil toward the oil supply end P are respectively provided between the large pump and the small pump and the oil supply end P. The large pump check valve 211 is provided on the first oil supply oil circuit 3. Since the overflow values ​​of the second high-pressure relief valve 8 and the low-pressure relief valve 9 are relatively large, in order to protect the small pump check valve 221, the small pump check valve 221 is provided between the intersection of the oil inlet end of the second oil supply oil circuit 4, the oil inlet end of the high-pressure relief valve, the oil port A2 and the small pump, so that the oil of the small pump first passes through the check valve, and then flows to the second oil supply oil circuit 4, the oil inlet end of the second high-pressure relief valve 8, and the oil port A2, respectively, to prevent the non-return end of the check valve from being damaged by the oil pressure of the second high-pressure relief valve 8.

[0041] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A highly adaptable hydraulic oil supply system for a garbage transfer station, characterized in that: include: Oil source (1); An oil pump device (2) comprising a first oil pump (21) and a second oil pump (22) connected to the oil source (1); The oil supply end P is connected to the first oil pump (21) and the second oil pump (22) through the first oil supply oil passage (3) and the second oil supply oil passage (4), respectively, and the oil supply end P is connected to the corresponding driving oil cylinder; The oil return end T is connected to a corresponding oil return oil circuit. The first oil pump (21) is connected to the oil return end T via a first high-pressure oil circuit and a first pressure-maintaining oil circuit whose on / off is controlled by a first control valve (5). The second oil pump (22) is connected to the oil return end T via a second high-pressure oil circuit, a second pressure-maintaining oil circuit and a low-pressure oil circuit whose on / off is controlled by a second control valve (6). The first high-pressure oil circuit, the second high-pressure oil circuit and the low-pressure oil circuit are respectively provided with a first high-pressure relief valve (7), a second high-pressure relief valve (8) and a low-pressure relief valve (9).

2. A highly adaptable hydraulic oil supply system for a garbage transfer station as claimed in claim 1, characterized in that: The oil pump device (2) comprises a double gear pump and a motor (23) for driving the double gear pump, wherein the double gear pump comprises the first oil pump (21) and the second oil pump (22), wherein the first oil pump (21) and the second oil pump (22) are respectively a large pump and a small pump.

3. A highly adaptable hydraulic oil supply system for a garbage transfer station as claimed in claim 2, characterized in that: The second control valve (6) is a small pump multi-way valve including a second high-pressure position, a second pressure-maintaining position, and a low-pressure position. The small pump multi-way valve includes an oil port A2 connected to the oil inlet end of the second high-pressure relief valve (8), an oil port B2 connected to the oil outlet end of the second high-pressure relief valve (8), a locked oil port C2, and an oil port D2 connected to the oil inlet end of the low-pressure relief valve (9). The oil outlet end of the second high-pressure relief valve (8) and the oil outlet end of the low-pressure relief valve (9) are respectively connected to the oil return end T. When the small pump multi-way valve is in the second high-pressure position, the oil port A2 is unidirectionally connected to the oil port C2, and the oil port D2 is unidirectionally connected to the oil return end. To the oil port B2, the small pump and the second high-pressure relief valve (8) are connected in sequence to form the second high-pressure oil circuit connected to the oil return end T; when the small pump multi-way valve is in the second pressure-maintaining position, the oil ports A2, B2, C2, and D2 are connected, and the small pump, oil port A2, and oil port B2 are connected in sequence to form the second pressure-maintaining oil circuit connected to the oil return end T; when the small pump multi-way valve is in the low-pressure position, the oil port A2 and the oil port C2 are respectively unidirectionally connected to the oil port D2 and the oil port B2, and the small pump, oil port A2, oil port D2, and the low-pressure relief valve (9) are connected in sequence to form the low-pressure oil circuit connected to the oil return end T.

4. A highly adaptable hydraulic oil supply system for a garbage transfer station as claimed in claim 2, characterized in that: The first control valve (5) is a large pump multi-way valve including a first high-pressure position and a first pressure-maintaining position, and the large pump multi-way valve includes an oil port A1 connected to the oil inlet end of the first high-pressure relief valve (7), an oil port B1 connected to the oil outlet end of the first high-pressure relief valve (7), a locked oil port C1, and a locked oil port D1; when the large pump multi-way valve is in the first high-pressure position, the oil port A1 and the oil port C1 are unidirectionally connected to the oil ports D1 and B1 respectively, and the large pump and the first high-pressure relief valve (7) are connected in sequence to form a first high-pressure oil circuit connected to the oil return end T; when the large pump multi-way valve is in the first pressure-maintaining position, the oil ports A1, B1, C1, and D1 are connected, and the large pump, the oil port A1, and the oil port B1 are connected in sequence to form a first pressure-maintaining oil circuit connected to the oil return end T.

5. A highly adaptable hydraulic oil supply system for a garbage transfer station as claimed in claim 1, characterized in that: The overflow value of the low-pressure relief valve (9) is smaller than the overflow value of the second high-pressure relief valve (8); the overflow value of the first high-pressure relief valve (7) is 8MPa-10MPa, the overflow value of the second high-pressure relief valve (8) is 15MPa-17MPa, and the overflow value of the low-pressure relief valve (9) is 20MPa-22MPa.

6. A highly adaptable hydraulic oil supply system for a garbage transfer station as claimed in claim 2, characterized in that: A large pump check valve (211) and a small pump check valve (221) are respectively provided between the large pump and the small pump and the oil supply end P, for controlling the one-way flow of oil toward the oil supply end P. The large pump check valve (211) is provided on the first oil supply oil circuit (3), and the small pump check valve (221) is provided between the oil inlet end of the second oil supply oil circuit (4), the oil inlet end of the second high-pressure relief valve (8), the intersection of the oil port A2 and the small pump.

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