Waste compression hydraulic control system and collection line waste compression station

Abstract

This application discloses a hydraulic control system for garbage compression and a garbage compression station for a collection line. By installing a scraper relief valve between the rodless chamber and the return oil pipe of the scraper cylinder, when the scraper reversing valve blocks the rod and rodless chambers of the scraper cylinder from the oil supply circuit to maintain pressure in the scraper cylinder, even if the pressure in the rodless chamber of the scraper cylinder gradually increases under load, once it exceeds the set relief pressure of the scraper relief valve, the scraper relief valve will open. At this time, the hydraulic oil in the rodless chamber of the scraper cylinder can overflow and release pressure through the scraper relief valve and return to the oil tank through the return oil pipe, thereby ensuring that the oil pressure in the rodless chamber of the scraper cylinder does not exceed the safe relief pressure, thus preventing abnormalities such as instability, breakage, and cylinder explosion of the scraper cylinder and improving safety.

Description

Technical Field

[0001] This application relates to the field of sanitation engineering technology, and in particular to a hydraulic control system for garbage compression and a garbage compression station for collection lines. Background Technology

[0002] A waste compression station, also known as a collection line waste compression station, is equipment or facility used for urban solid waste management. It reduces waste volume through mechanical compression, thereby improving transportation efficiency and processing capacity. This type of equipment plays an important role in optimizing waste management and reducing environmental pollution.

[0003] like Figure 1 As shown, the waste compression station 400 of the collection line generally uses a scraper cylinder 210 to drive the scraper 410 to compress waste. During the process of the scraper compressing waste, abnormalities such as instability, breakage, and cylinder explosion of the scraper cylinder are prone to occur, which is extremely dangerous. Utility Model Content

[0004] The purpose of this application is to provide a hydraulic control system for garbage compression and a garbage compression station for collection lines, which can prevent abnormalities such as instability, breakage, and cylinder explosion of the scraper cylinder, thereby improving safety.

[0005] The embodiments of this application can be implemented as follows:

[0006] In a first aspect, this utility model provides a garbage compression hydraulic control system, including an oil supply circuit and a scraper drive oil circuit;

[0007] The oil supply circuit includes an oil tank, an oil pump, an oil inlet pipe, and an oil return pipe connected in sequence, and the oil return pipe is also connected to the oil tank.

[0008] The scraper drive oil circuit includes a scraper cylinder and a scraper reversing valve; the oil inlet pipe and the oil return pipe are both connected to the scraper reversing valve, and the rod chamber and rodless chamber of the scraper cylinder are both connected to the scraper reversing valve; the scraper reversing valve is in a second state, used to block the rod chamber and rodless chamber of the scraper cylinder from the oil inlet pipe, and the rodless chamber and rod chamber of the scraper cylinder from the oil return pipe;

[0009] The scraper drive oil circuit also includes a scraper overflow valve, which is connected to the rodless chamber of the scraper cylinder and the return oil pipe.

[0010] In an optional embodiment, the scraper drive oil circuit further includes a scraper check valve, which is connected between the rod chamber of the scraper cylinder and the return oil pipe.

[0011] The direction of the scraper check valve is from the return oil pipe to the rod chamber of the scraper cylinder.

[0012] In an optional embodiment, the scraper reversing valve is in a first state, used to connect the oil inlet pipe to the rodless chamber of the scraper cylinder, and the rod chamber of the scraper cylinder to the return pipe.

[0013] The scraper reversing valve is in the third state, used to connect the oil inlet pipe to the rod chamber of the scraper cylinder, and the rodless chamber of the scraper cylinder is connected to the return pipe.

[0014] In an optional embodiment, the scraper reversing valve is an O-type three-position four-way valve, which has a P1 port, a T1 port, an A1 port and a B1 port. The P1 port is connected to the oil inlet pipe, the A1 port is connected to the rodless chamber of the scraper cylinder, the B1 port is connected to the rod chamber of the scraper cylinder, and the T1 port is connected to the oil return pipe.

[0015] The scraper reversing valve is in the first state, with port P1 and port A1 connected, and port B1 and port T1 connected;

[0016] The scraper reversing valve is in the second state, and both port A1 and port B1 are blocked from port P1 and port T1;

[0017] The scraper reversing valve is in the third state, with port P1 and port B1 connected, and port A1 and port T1 connected.

[0018] In an optional embodiment, the scraper drive oil circuit includes a first scraper oil pipe and a second scraper oil pipe;

[0019] The first scraper oil pipe is connected to the rodless chamber of the scraper oil cylinder and the A1 port;

[0020] The second scraper oil pipe is connected to the rodless chamber of the scraper oil cylinder and the B1 port;

[0021] The scraper overflow valve is connected to the first scraper oil pipe and the return oil pipe;

[0022] The scraper check valve is connected between the second scraper oil pipe and the return oil pipe.

[0023] In an optional embodiment, the oil inlet pipe includes a first pipe section and a second pipe section, and the oil pump, the first pipe section and the scraper reversing valve are connected in sequence.

[0024] The first pipe section and the return oil pipe are connected by a safety relief valve; and / or, the first pipe section is provided with an oil inlet check valve, the conduction direction of the oil inlet check valve being from the oil pump to the second pipe section.

[0025] In an optional embodiment, the waste compression hydraulic control system further includes a slide plate drive circuit, which includes a slide plate cylinder and a slide plate reversing valve;

[0026] Both the oil inlet pipe and the oil return pipe are connected to the slide plate reversing valve, and both the rodless chamber and the rod chamber of the slide plate cylinder are connected to the slide plate reversing valve.

[0027] The slide plate reversing valve is in the first state, used to connect the rodless chamber of the slide plate cylinder to the oil inlet pipe, and the rod chamber of the slide plate cylinder to the oil return pipe;

[0028] The slide plate reversing valve is in the third state, used to connect the rod chamber of the slide plate cylinder to the oil inlet pipe, and the rodless chamber of the slide plate cylinder to the oil return pipe.

[0029] In an optional embodiment, the slide reversing valve is in a second state, used to block both the rodless chamber and the rod chamber of the slide cylinder from the oil inlet pipe, and to block both the rodless chamber and the rod chamber of the slide cylinder from the oil return pipe.

[0030] In an optional embodiment, the slide gate reversing valve is an O-type three-position four-way valve, which has a P2 port, a T2 port, an A2 port and a B2 port; the P2 port is connected to the oil inlet pipe, the A2 port is connected to the rodless chamber of the slide gate cylinder, the B2 port is connected to the rod chamber of the slide gate cylinder, and the T2 port is connected to the oil return pipe.

[0031] The slide plate reversing valve is in the first state, with port P2 connected to port A2 and port B2 connected to the return oil pipe;

[0032] The slide reversing valve is in the second state, and both port A2 and port B2 are blocked from port P2 and port T2;

[0033] The slide reversing valve is in the third state, with port P2 connected to port B2 and port A2 connected to port T2.

[0034] Secondly, this utility model provides a waste compression station for a collection line, including the waste compression hydraulic control system described in any of the foregoing embodiments.

[0035] The beneficial effects of the embodiments of this application include, for example:

[0036] The operation of the oil pump allows the hydraulic oil in the tank to return to the tank sequentially through the inlet and return pipes, achieving uninterrupted hydraulic oil circulation. This allows oil to be supplied to either the rodless or rod chamber of the scraper cylinder as needed, enabling the scraper cylinder to extend or shorten. Because a scraper relief valve is installed between the rodless chamber and the return pipe, when the scraper directional valve blocks the rod and rodless chambers from the oil supply circuit to maintain pressure in the scraper cylinder, even if the pressure in the rodless chamber gradually increases under load, once it exceeds the set relief pressure, the scraper relief valve will open. At this point, the hydraulic oil in the rodless chamber can overflow and return to the tank through the return pipe, thus ensuring that the oil pressure in the rodless chamber does not exceed the safe relief pressure. This prevents abnormalities such as instability, breakage, or cylinder explosion of the scraper cylinder, improving safety. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the waste compression station for the collection line in this application;

[0039] Figure 2 The principle of the waste compression hydraulic control system in the embodiments of this application Figure 1 .

[0040] Icons: 100-Fuel supply circuit; 110-Fuel tank; 120-Fuel pump; 130-Fuel inlet pipe; 131-First pipe section; 132-Second pipe section; 140-Fuel return pipe; 150-Safety relief valve; 160-Fuel inlet check valve; 200-Scraper drive oil circuit; 210-Scraper cylinder; 220-Scraper directional valve; 230-Scraper relief valve; 240-Scraper check valve; 250-First scraper oil pipe; 251- Second scraper oil pipe; 260-Scraper oil inlet pipe; 261-Scraper oil return pipe; 270-Scraper overflow pipe; 280-Scraper oil replenishment pipe; 300-Slide plate drive oil circuit; 310-Slide plate cylinder; 320-Slide plate reversing valve; 330-Slide plate oil inlet pipe; 340-Slide plate oil return pipe; 350-First slide plate oil pipe; 360-Second slide plate oil pipe; 400-Collection line garbage compression station; 410-Scraper; 420-Slide plate. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0042] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0043] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0044] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not 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 on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0045] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0046] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0047] To address the issues of instability, breakage, and cylinder explosion that easily occur in the scraper cylinder 210 during the waste compression process of the waste collection line 400, this application studies the existing hydraulic system of the waste collection line 400 and finds that:

[0048] refer to Figure 1 The existing hydraulic cylinder-driven scraper 410 compression process is as follows: the hydraulic system of the waste compression station 400 of the collection line opens the reversing valve of the scraper cylinder 210, connects the scraper cylinder 210 to the oil supply circuit 100, supplies oil to the rod chamber of the scraper cylinder 210, causing the scraper cylinder 210 to extend and drive the scraper 410 to tilt down to a preset angle. Then the reversing valve is closed, cutting off the oil passage connection between the rod chamber and the rodless chamber of the scraper cylinder 210 and the hydraulic system, so that the scraper cylinder 210 is in a pressure-holding state. Then the slide plate 420 drives the scraper 410 to move repeatedly to scrape the waste evenly.

[0049] During the scraping motion of the scraper 410, the reaction force of the scraper 410 on the scraper cylinder 210 is transmitted to the piston rod of the scraper cylinder 210, and then to the rodless chamber. Under the pressure-holding state where the rod chamber and rodless chamber of the scraper cylinder 210 are not connected to the oil circuit, the pressure in the large chamber (rodless chamber) of the scraper cylinder 210 will continue to rise under the load. Once the pressure exceeds its bearing capacity, the scraper cylinder 210 is prone to instability, breakage, cylinder explosion and other abnormalities.

[0050] After discovering the root cause of the instability, breakage, and explosion of the scraper cylinder 210 when the scraper 410 compresses garbage, the inventors of this application have developed a garbage compression hydraulic control system to improve the above-mentioned defects. This system can prevent the scraper cylinder 210 from becoming unstable, breaking, or exploding, thereby improving safety.

[0051] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0052] refer to Figure 2 This application discloses a garbage compression hydraulic control system, which can be applied to the above-mentioned compression station and includes an oil supply circuit 100 and a scraper drive oil circuit 200.

[0053] The oil supply circuit 100 includes an oil tank 110, an oil pump 120, an oil inlet pipe 130, and an oil return pipe 140 connected in sequence. The oil return pipe 140 is also connected to the oil tank 110.

[0054] The scraper drive oil circuit 200 includes a scraper cylinder 210, a scraper reversing valve 220 and a scraper relief valve 230;

[0055] Both the oil inlet pipe 130 and the oil return pipe 140 are connected to the scraper reversing valve 220, and both the rod chamber and the rodless chamber of the scraper cylinder 210 are connected to the scraper reversing valve 220.

[0056] The scraper overflow valve 230 is connected to the rodless chamber of the scraper cylinder 210 and the return oil pipe 140;

[0057] The scraper reversing valve 220 is in the second state, used to block both the rod chamber and the rodless chamber of the scraper cylinder 210 from the oil inlet pipe 130, and to block both the rodless chamber and the rod chamber of the scraper cylinder 210 from the oil return pipe 140.

[0058] In this embodiment, the operation of the oil pump 120 enables the hydraulic oil in the oil tank 110 to return to the oil tank 110 sequentially through the oil inlet pipe 130 and the oil return pipe 140, thereby achieving uninterrupted delivery and circulation of hydraulic oil. As needed, oil can be introduced into the rodless chamber or the rod chamber of the scraper cylinder 210 to extend or shorten the scraper cylinder 210. Because a scraper relief valve 230 is installed between the rodless chamber of the scraper cylinder 210 and the return oil pipe 140, when the scraper reversing valve 220 blocks the rod and rodless chambers of the scraper cylinder 210 from the oil supply circuit 100, causing the scraper cylinder 210 to maintain pressure, even if the rodless chamber of the scraper cylinder 210 gradually increases under load, once it exceeds the set relief pressure of the scraper relief valve 230, the scraper relief valve 230 will open. At this time, the hydraulic oil in the rodless chamber of the scraper cylinder 210 can be relieved through the scraper relief valve 230 and return to the oil tank 110 through the return oil pipe 140, thereby keeping the oil pressure in the rodless chamber of the scraper cylinder 210 from exceeding the safe relief pressure, thus preventing the scraper cylinder 210 from becoming unstable, broken, or bursting, and improving safety.

[0059] The overflow pressure of the scraper overflow valve 230 is not specifically limited. It can be flexibly set according to the actual pipeline safety pressure and the safety pressure of the scraper cylinder 210. For example, the overflow pressure of the scraper overflow valve 230 can be set to 27 MPa. When the load force acting on the scraper cylinder 210 is greater than 27 MPa, the scraper overflow valve 230 can overflow, and the excess hydraulic oil flows back to the oil tank 110 through the return oil pipe 140.

[0060] The scraper drive oil circuit 200 also includes a scraper check valve 240, which is connected between the rod chamber of the scraper cylinder 210 and the return oil pipe 140. The conduction direction of the scraper check valve 240 is from the return oil pipe 140 to the rod chamber of the scraper cylinder 210. When the scraper overflow valve 230 is opened to overflow and relieve pressure in the rodless chamber of the scraper cylinder 210, the oil pressure in the rodless chamber gradually decreases, and the piston rod will gradually shorten and retract under the load force. At this time, the rod chamber will draw oil into the return oil pipe 140 through the negative pressure. Then the hydraulic oil in the return oil pipe 140 can be automatically replenished to the rod chamber of the scraper cylinder 210 through the scraper check valve 240.

[0061] In this embodiment, the scraper reversing valve 220 is in the first state, which is used to connect the oil inlet pipe 130 with the rodless chamber of the scraper cylinder 210 and the rod chamber of the scraper cylinder 210 with the return pipe 140. In this way, oil enters the rodless chamber of the scraper cylinder 210 and oil exits the rod chamber of the scraper cylinder 210, thereby extending the scraper cylinder 210. Then, the scraper cylinder 210 can drive the scraper 410 to flip down to compress the garbage.

[0062] When the scraper reversing valve 220 is in the third state, it is used to connect the oil inlet pipe 130 to the rod chamber of the scraper cylinder 210 and the rodless chamber of the scraper cylinder 210 to the return oil pipe 140. In this way, oil is discharged from the rodless chamber of the scraper cylinder 210 and oil is fed into the rod chamber of the scraper cylinder 210, thereby shortening the scraper cylinder 210. Then, the scraper cylinder 210 can drive the scraper 410 to flip up and open for garbage to be dumped.

[0063] Specifically, the scraper reversing valve 220 is an O-type three-position four-way valve, which has a P1 port, a T1 port, an A1 port and a B1 port. The P1 port is connected to the oil inlet pipe 130, the A1 port is connected to the rodless chamber of the scraper cylinder 210, the B1 port is connected to the rod chamber of the scraper cylinder 210, and the T1 port is connected to the return oil pipe 140.

[0064] When the scraper reversing valve 220 is in the first state, ports P1 and A1 are connected, and ports B1 and T1 are connected. In this way, the hydraulic oil in the oil tank 110 is supplied to the rodless chamber of the scraper cylinder 210 through the oil inlet pipe 130, port P1 and port A1. The hydraulic oil in the rod chamber of the scraper cylinder 210 can then return to the oil tank 110 through port B1, port T1 and return pipe 140.

[0065] When the scraper reversing valve 220 is in the second state, both ports A1 and B1 are blocked from ports P1 and T1. At this time, the scraper cylinder 210 can be in the pressure holding state. The oil pressure in the rodless chamber of the scraper cylinder 210 can be kept from exceeding the overflow pressure of the scraper overflow valve 230 by the scraper overflow valve 230.

[0066] When the scraper directional valve 220 is in the third state, ports P1 and B1 are connected, and ports A1 and T1 are connected. In this way, the hydraulic oil in the cylinder is supplied to the rod chamber of the scraper cylinder 210 through the inlet pipe 130, port P1 and port B1. The hydraulic oil in the rodless chamber of the scraper cylinder 210 can then return to the oil tank 110 through port A1, port T1 and return pipe 140.

[0067] Of course, the inlet pipe 130 and return pipe 140 are connected to the scraper directional valve 220, and the scraper cylinder 210 is connected to the scraper directional valve 220 via pipelines. That is, the scraper drive oil circuit 200 includes a scraper inlet pipe 260, a scraper return pipe 261, a first scraper oil pipe 250, and a second scraper oil pipe 251. The scraper inlet pipe 260 is connected to port P1 and inlet pipe 130; the scraper return pipe 261 is connected to port T1 and return pipe 140; the first scraper oil pipe 250 is connected to the rodless chamber of scraper cylinder 210 and port A1; the second scraper oil pipe 251 is connected to the rodless chamber of scraper cylinder 210 and port B1. The scraper overflow valve 230 is connected to the first scraper oil pipe 250 and return pipe 140.

[0068] When the scraper directional valve 220 is in the first state, hydraulic oil can enter the rodless chamber of the scraper cylinder 210 through the scraper inlet pipe 260, port P1, port A1, and the first scraper oil pipe 250. The hydraulic oil in the rod chamber of the scraper cylinder 210 can return to the return pipe 140 through the second scraper oil pipe 251, port B1, port T1, and the scraper return pipe 261. When the scraper directional valve 220 is in the second state, the hydraulic oil in the rodless chamber of the scraper cylinder 210 can be overflowed and depressurized through the first scraper oil pipe 250 and the scraper relief valve 230, with excess hydraulic oil returning to the return pipe 140. When the scraper directional valve 220 is in the third state, hydraulic oil can enter the rod chamber of the scraper cylinder 210 through the scraper inlet pipe 260, port P1, port B1 and the second scraper oil pipe 251. The hydraulic oil in the rodless chamber of the scraper cylinder 210 can return to the return pipe 140 through the first scraper oil pipe 250, port A1, port T1 and scraper return pipe 261.

[0069] The scraper overflow valve 230 is installed on a scraper overflow pipe 270, with its two ends connected to the first scraper oil pipe 250 and the scraper return oil pipe 261, respectively. The scraper check valve 240 is connected between the second scraper oil pipe 251 and the return oil pipe 140. Specifically, the scraper check valve 240 is installed on a scraper replenishment oil pipe 280, with its two ends connected to the return oil pipe 140 and the second scraper oil pipe 251, respectively.

[0070] In addition, to ensure the safety of the pipeline pressure in the oil supply circuit 100, the oil inlet pipe 130 and the oil return pipe 140 are connected by a safety relief valve 150. The safety relief valve 150 is connected to the oil inlet pipe 130 at a position upstream of the scraper reversing valve 220. Specifically, the oil inlet pipe 130 includes a first pipe section 131 and a second pipe section 132. The oil pump 120, the first pipe section 131, the second pipe section 132, and the scraper reversing valve 220 are connected in sequence. The first pipe section 131 and the oil return pipe 140 are connected by the safety relief valve 150. In this way, when the pressure in the oil inlet pipe 130 is greater than the overflow pressure of the safety relief valve 150, the safety relief valve 150 opens, and part of the hydraulic oil in the oil inlet pipe 130 is depressurized and overflows to the oil return pipe 140 through the safety relief valve 150, and finally flows back to the oil tank 110, realizing the circulation of hydraulic oil in the oil supply circuit 100.

[0071] To ensure the unidirectional flow of hydraulic oil, an inlet check valve 160 is provided in the inlet pipe 130. The inlet check valve 160 is located upstream of the scraper reversing valve 220. Specifically, the inlet check valve 160 is installed on the first pipe section 131. The conduction direction of the inlet check valve 160 is from the oil pump 120 to the second pipe section 132, which is the delivery direction of the oil pump 120, to prevent the hydraulic oil in the inlet pipe 130 from flowing back.

[0072] The waste compression hydraulic control system also includes a slide plate drive oil circuit 300, which includes a slide plate cylinder 310 and a slide plate directional valve 320; the inlet pipe 130 and the return pipe 140 are both connected to the slide plate directional valve 320, and the rodless chamber and the rod chamber of the slide plate cylinder 310 are both connected to the slide plate directional valve 320; the slide plate directional valve 320 is located downstream of the inlet check valve 160.

[0073] When the slide plate reversing valve 320 is in the first state, it is used to connect the rodless chamber of the slide plate cylinder 310 with the oil inlet pipe 130, and the rod chamber of the slide plate cylinder 310 with the oil return pipe 140, and the slide plate cylinder 310 extends.

[0074] The sliding plate reversing valve 320 is in the second state, which is used to block both the rodless chamber and the rod chamber of the sliding plate cylinder 310 from the oil inlet pipe 130, and to block both the rodless chamber and the rod chamber of the sliding plate cylinder 310 from the oil return pipe 140, and the sliding plate cylinder 310 maintains pressure.

[0075] When the slide plate reversing valve 320 is in the third state, it is used to connect the rod chamber of the slide plate cylinder 310 with the oil inlet pipe 130, and the rodless chamber of the slide plate cylinder 310 with the oil return pipe 140, and the slide plate cylinder 310 is shortened.

[0076] Among them, the sliding plate reversing valve 320 is an O-type three-position four-way valve, which has a P2 port, a T2 port, an A2 port and a B2 port; the P2 port is connected to the oil inlet pipe 130, the A2 port is connected to the rodless chamber of the sliding plate cylinder 310, the B2 port is connected to the rod chamber of the sliding plate cylinder 310, and the T2 port is connected to the oil return pipe 140.

[0077] When the sliding plate reversing valve 320 is in the first state, port P2 is connected to port A2, and port B2 is connected to the return oil pipe 140. In this way, the hydraulic oil in the oil tank 110 is supplied to the rodless chamber of the sliding plate cylinder 310 through the inlet pipe 130, port P2 and port A2. The hydraulic oil in the rod chamber of the sliding plate cylinder 310 can then return to the oil tank 110 through port B2, port T2 and return oil pipe 140.

[0078] When the slide reversing valve 320 is in the second state, both ports A2 and B2 are blocked from ports P2 and T2. At this time, the slide cylinder 310 can be in the pressure holding state.

[0079] When the sliding plate directional valve 320 is in the third state, port P2 is connected to port B2, and port A2 is connected to port T2. In this way, the hydraulic oil in the cylinder is supplied to the rod chamber of the sliding plate cylinder 310 through the oil inlet pipe 130, port P2 and port B2. The hydraulic oil in the rodless chamber of the sliding plate cylinder 310 can return to the oil tank 110 through port A2, port T2 and return pipe 140.

[0080] Of course, the inlet pipe 130 and return pipe 140 are connected to the slide plate directional valve 320, and the slide plate cylinder 310 is connected to the slide plate directional valve 320 via pipelines. That is, the slide plate drive oil circuit 300 includes a slide plate inlet pipe 330, a return pipe 140, a first slide plate oil pipe 350, and a second slide plate oil pipe 360. The slide plate inlet pipe 330 is connected to port P2 and inlet pipe 130; the slide plate return pipe 340 is connected to port T2 and return pipe 140; the first slide plate oil pipe 350 is connected to the rodless chamber of the slide plate cylinder 310 and port A2; the second slide plate oil pipe 360 ​​is connected to the rodless chamber of the slide plate cylinder 310 and port B2. The slide plate 420 overflow valve is connected to the first slide plate oil pipe 350 and return pipe 140.

[0081] When the sliding plate directional valve 320 is in the first state, hydraulic oil can enter the rodless chamber of the sliding plate cylinder 310 through the sliding plate inlet pipe 330, port P2, port A2, and the first sliding plate oil pipe 350. Hydraulic oil in the rod chamber of the sliding plate cylinder 310 can return to the return pipe 140 through the second sliding plate oil pipe 360, port B2, port T2, and the sliding plate return pipe 340. When the sliding plate directional valve 320 is in the second state, the sliding plate cylinder 310 maintains pressure. When the sliding plate directional valve 320 is in the third state, hydraulic oil can enter the rod chamber of the sliding plate cylinder 310 through the sliding plate inlet pipe 330, port P2, port B2, and the second sliding plate oil pipe 360. Hydraulic oil in the rodless chamber of the sliding plate cylinder 310 can return to the return pipe 140 through the first sliding plate oil pipe 350, port A2, port T2, and the sliding plate return pipe 340.

[0082] In addition, this application also discloses a waste collection line compression station 400, which includes the waste compression hydraulic control system described above, and therefore also has corresponding beneficial effects.

[0083] Finally, it should be noted that in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0084] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A hydraulic control system for garbage compression, characterized in that, It includes an oil supply circuit (100) and a scraper drive oil circuit (200); The oil supply circuit (100) includes an oil tank (110), an oil pump (120), an oil inlet pipe (130), and an oil return pipe (140) connected in sequence, and the oil return pipe (140) is also connected to the oil tank (110); The scraper drive oil circuit (200) includes a scraper cylinder (210) and a scraper reversing valve (220); the oil inlet pipe (130) and the oil return pipe (140) are both connected to the scraper reversing valve (220); the rod chamber and rodless chamber of the scraper cylinder (210) are both connected to the scraper reversing valve (220); the scraper reversing valve (220) is in a second state, used to block the rod chamber and rodless chamber of the scraper cylinder (210) from the oil inlet pipe (130), and the rodless chamber and rod chamber of the scraper cylinder (210) from the oil return pipe (140); The scraper drive oil circuit (200) also includes a scraper overflow valve (230), which is connected to the rodless chamber of the scraper cylinder (210) and the return oil pipe (140).

2. The waste compression hydraulic control system according to claim 1, characterized in that, The scraper drive oil circuit (200) also includes a scraper check valve (240), which is connected between the rod chamber of the scraper cylinder (210) and the return oil pipe (140). The conduction direction of the scraper check valve (240) is from the return oil pipe (140) to the rod chamber of the scraper cylinder (210).

3. The waste compression hydraulic control system according to claim 1, characterized in that, The scraper reversing valve (220) is in the first state, used to connect the oil inlet pipe (130) with the rodless chamber of the scraper cylinder (210), and the rod chamber of the scraper cylinder (210) is connected with the return pipe (140). The scraper reversing valve (220) is in the third state, used to connect the oil inlet pipe (130) to the rod chamber of the scraper cylinder (210), and the rodless chamber of the scraper cylinder (210) is connected to the return pipe (140).

4. The waste compression hydraulic control system according to claim 3, characterized in that, The scraper reversing valve (220) is an O-type three-position four-way valve, which has a P1 port, a T1 port, an A1 port and a B1 port. The P1 port is connected to the oil inlet pipe (130), the A1 port is connected to the rodless chamber of the scraper cylinder (210), the B1 port is connected to the rod chamber of the scraper cylinder (210), and the T1 port is connected to the return oil pipe (140). The scraper reversing valve (220) is in the first state, with port P1 and port A1 connected, and port B1 and port T1 connected; The scraper reversing valve (220) is in the second state, and both port A1 and port B1 are blocked from port P1 and port T1; The scraper reversing valve (220) is in the third state, with port P1 and port B1 connected, and port A1 and port T1 connected.

5. The waste compression hydraulic control system according to claim 4, characterized in that, The scraper drive oil circuit (200) includes a first scraper oil pipe (250) and a second scraper oil pipe (251); The first scraper oil pipe (250) is connected to the rodless chamber of the scraper oil cylinder (210) and the A1 port; The second scraper oil pipe (251) is connected to the rodless chamber of the scraper oil cylinder (210) and the B1 port; The scraper overflow valve (230) is connected to the first scraper oil pipe (250) and the return oil pipe (140); A scraper check valve (240) is connected between the second scraper oil pipe (251) and the return oil pipe (140).

6. The waste compression hydraulic control system according to claim 1, characterized in that, The oil inlet pipe (130) includes a first pipe section (131) and a second pipe section (132), and the oil pump (120), the first pipe section (131), the second pipe section (132) and the scraper reversing valve (220) are connected in sequence; The first pipe section (131) and the return oil pipe (140) are connected by a safety relief valve (150); and / or, the first pipe section (131) is provided with an oil inlet check valve (160), the conduction direction of the oil inlet check valve (160) being from the oil pump (120) to the second pipe section (132).

7. The waste compression hydraulic control system according to claim 1, characterized in that, The waste compression hydraulic control system also includes a slide plate drive oil circuit (300), which includes a slide plate cylinder (310) and a slide plate reversing valve (320); The oil inlet pipe (130) and the oil return pipe (140) are both connected to the slide plate reversing valve (320), and the rodless chamber and the rod chamber of the slide plate cylinder (310) are both connected to the slide plate reversing valve (320). The sliding plate reversing valve (320) is in the first state, used to connect the rodless chamber of the sliding plate cylinder (310) to the oil inlet pipe (130), and the rod chamber of the sliding plate cylinder (310) to the oil return pipe (140); The sliding plate reversing valve (320) is in the third state, which is used to connect the rod chamber of the sliding plate cylinder (310) with the oil inlet pipe (130) and the rodless chamber of the sliding plate cylinder (310) with the oil return pipe (140).

8. The waste compression hydraulic control system according to claim 7, characterized in that, The sliding plate reversing valve (320) is in the second state, which is used to block both the rodless chamber and the rod chamber of the sliding plate cylinder (310) from the oil inlet pipe (130), and to block both the rodless chamber and the rod chamber of the sliding plate cylinder (310) from the oil return pipe (140).

9. The waste compression hydraulic control system according to claim 8, characterized in that, The sliding plate reversing valve (320) is an O-type three-position four-way valve, which has a P2 port, a T2 port, an A2 port and a B2 port; the P2 port is connected to the oil inlet pipe (130), the A2 port is connected to the rodless chamber of the sliding plate cylinder (310), the B2 port is connected to the rod chamber of the sliding plate cylinder (310), and the T2 port is connected to the oil return pipe (140); The slide plate reversing valve (320) is in the first state, the P2 port is connected to the A2 port, and the B2 port is connected to the return oil pipe (140); The slide reversing valve (320) is in the second state, and both port A2 and port B2 are blocked from port P2 and port T2; The slide reversing valve (320) is in the third state, with port P2 connected to port B2 and port A2 connected to port T2.

10. A waste compression station for collection lines, characterized in that, The waste compression hydraulic control system includes any one of claims 1-9.

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