Sanitation vehicle control system

Abstract

The utility model discloses a sanitation vehicle control system. The problems that an existing sanitation vehicle is low in control precision and a sanitation vehicle control system is high in energy consumption are solved. The hydraulic control valve comprises a valve body, an oil inlet, an oil return port and a feedback oil way, and further comprises a first link and a second link, the three-way valve is arranged on the first link; the oil inlet is connected with the oil return port through a three-way valve; the working unit comprises a first reversing valve rod and a working oil port; an outlet of the first reversing valve rod is connected with the working oil port; pressure oil at an outlet of the first reversing valve rod is connected with a three-way valve spring cavity through a pressure tapping one-way valve, pressure oil at an oil inlet enters a three-way valve control cavity, and pressure oil at an outlet of the pressure tapping one-way valve enters the three-way valve spring cavity and is matched with set spring force of the three-way valve to control an opening of the three-way valve. The pressure tapping one-way valve is arranged and connected with the three-way valve spring cavity, the output flow of the working port can be controlled, and energy consumption is reduced.

Description

Technical Field

[0001] This utility model relates to a sanitation sweeper, specifically to a sanitation vehicle control system. Background Technology

[0002] Road sweeper trucks are a new type of high-efficiency cleaning equipment that integrates road sweeping, garbage collection, and transportation. Simply put, they are vehicles modified from special-purpose truck chassis to include road sweeping and water spraying functions. In addition to the chassis engine, an auxiliary engine is added, and the sweeping brushes are driven by hydraulic motors. They also include a blower, garbage bin, water tank, and other supporting equipment. This new type of vehicle can complete ground sweeping, curb sweeping, curb washing, and post-sweeping water spraying in one operation, making it suitable for cleaning operations in various climates and on different dry road surfaces.

[0003] Currently, most mainstream sanitation trucks use solenoid valves to control the flow of pilot oil, thereby controlling the valve stem's direction. The directional valve stem of the working link is usually controlled by a conventional electromagnet. Since some movements of sanitation hook-lift vehicles do not require a large flow rate, using a conventional working link structure would result in wasted flow and high energy consumption. Utility Model Content

[0004] To address the problems of low control precision and high energy consumption in existing sanitation vehicle control systems, this invention provides a sanitation vehicle control system.

[0005] The technical solution of this utility model is: a sanitation vehicle control system, including a valve body, an oil inlet, an oil return outlet, and a feedback oil circuit, and further including:

[0006] The first section, the oil inlet and oil return port are located on the first section;

[0007] A three-way valve is installed on the first connection; the oil inlet is connected to the oil return port through the three-way valve.

[0008] The working link includes a first reversing valve stem and a working oil port, wherein the oil inlet is connected through the first reversing valve stem;

[0009] The pressure-tapping check valve connects the outlet of the first directional valve stem to the working oil port. The pressure oil at the outlet of the first directional valve stem is connected to the spring chamber of the three-way valve through the pressure-tapping check valve. The pressure oil at the inlet enters the control chamber of the three-way valve, and the pressure oil at the outlet of the pressure-tapping check valve enters the spring chamber of the three-way valve. The pressure oil and the set spring force of the three-way valve work together to control the opening of the three-way valve.

[0010] As a further improvement of this utility model, the working oil port includes a first oil port and a second oil port, there are two pressure tapping check valves, the first reversing valve stem is connected to the first oil port through the first oil passage; the first reversing valve stem is connected to the second oil port through the second oil passage; the pressure oil of the first oil passage and the second oil passage is connected to the spring chamber of the three-way valve through different pressure tapping check valves.

[0011] As a further improvement of this utility model, it also includes a hydraulic lock assembly disposed on the valve body. The hydraulic lock assembly has a first state of being open, which connects the first oil port to the first oil passage and simultaneously connects the second oil port to the second oil passage, and a second state of being closed.

[0012] As a further improvement of this utility model, the pressure-tapping one-way valve includes a valve seat, a valve ball, and a first elastic element. The valve seat is provided with an oil inlet. The first elastic element abuts against the valve ball and presses the valve ball against the valve seat, thus blocking the oil inlet.

[0013] As a further improvement of this utility model, the hydraulic lock assembly includes a piston rod, a first control valve, and a second control valve. The piston rod is disposed in the valve body and separates the first oil passage from the second oil passage. The first control valve is disposed on the first oil passage, and the second control valve is disposed on the second oil passage.

[0014] As a further improvement of this utility model, the piston rod has a first position in which it is stationary in the valve body so that the hydraulic lock assembly is in a closed state, and a second position in which it slides and cooperates with the valve body to open the first control valve or the second control valve when the hydraulic lock assembly is in an open state.

[0015] As a further improvement of this utility model, the first control valve includes a valve sleeve, a valve core, and a screw plug. The valve core is disposed inside the valve sleeve and slides with the valve sleeve. The valve sleeve is inserted into the valve body and fixed to the valve body. The screw plug is inserted into the end of the valve sleeve and connected to the valve core through a second elastic element.

[0016] As a further improvement of this utility model, the piston rod includes a connecting part and a pushing part. The connecting part is disposed in the valve body and is used to separate the first oil passage and the second oil passage. There are two pushing parts and they are disposed on both sides of the connecting part.

[0017] As a further improvement of this utility model, the valve body is integrally cast.

[0018] As a further improvement of this utility model, it also includes a proportional electromagnet, which is connected to the first directional valve stem and is used to drive the first directional valve stem to slide relative to the valve body.

[0019] The beneficial effects of this invention are that it incorporates a pressure-tapping check valve, which is connected to the spring chamber of a three-way valve. This allows for control of the output flow at the working port, ensuring that the flow is only affected by the size of the valve stem opening, thus reducing energy consumption. This invention also features a simple structure, convenient assembly, reliable operation, and long service life. Attached Figure Description

[0020] Appendix Figure 1 This is a hydraulic schematic diagram of an embodiment of the present invention.

[0021] Appendix Figure 2 This is a structural schematic diagram of an embodiment of the present utility model.

[0022] Appendix Figure 3 For the appendix Figure 2 A magnified structural diagram of point I in the middle.

[0023] Appendix Figure 4 This is a hydraulic schematic diagram of the working link in an embodiment of the present invention.

[0024] In the diagram, 1 is the valve body; 2 is the first connection; 3 is the three-way valve; 4 is the working connection; 41 is the first directional valve stem; 42 is the working port; 421 is the first port; 422 is the second port; 43 is the first oil passage; 44 is the second oil passage; 5 is the pressure tapping check valve; 51 is the valve seat; 511 is the oil tap; 52 is the valve ball; 53 is the first elastic element; 6 is the hydraulic lock assembly; 61 is the piston rod; 611 is the connecting part; 612 is the pushing part; 62 is the first control valve; 621 is the valve sleeve; 622 is the valve core; 623 is the screw plug; 624 is the second elastic element; 63 is the second control valve; 7 is the proportional solenoid; P is the oil inlet; T is the oil return port; LS is the feedback oil circuit. Detailed Implementation

[0025] The embodiments of this utility model will be further described below with reference to the accompanying drawings:

[0026] Depend on Figure 1 Combination Figure 2-4 As shown, a sanitation vehicle control system includes a valve body 1, an oil inlet P, an oil return port T, and a feedback oil circuit LS, and further includes:

[0027] First section 2, the oil inlet P and oil return outlet T are located on first section 2;

[0028] Three-way valve 3 is installed on the first connection 2; the oil inlet P is connected to the oil return port T through the three-way valve 3.

[0029] Working link 4 includes a first reversing valve stem 41 and a working oil port 42, wherein the oil inlet P is connected through the first reversing valve stem 41;

[0030] The pressure-tapping check valve 5 connects the outlet of the first directional valve stem 41 to the working oil port 42. The pressure oil at the outlet of the first directional valve stem 41 is connected to the spring chamber of the three-way valve 3 via the pressure-tapping check valve 5. Pressure oil at the inlet P enters the control chamber of the three-way valve 3, and pressure oil at the outlet of the pressure-tapping check valve 5 enters the spring chamber of the three-way valve 3. These pressure oils, in conjunction with the set spring force of the three-way valve 3, control the opening of the three-way valve 3. The beneficial effect of this invention is that by setting a pressure-tapping check valve, which is connected to the spring chamber of the three-way valve, the output flow rate of the working port can be controlled, ensuring that the flow rate is only affected by the size of the opening of the working valve stem, thus reducing energy consumption. This invention also has the advantages of simple structure, convenient assembly, reliable operation, and long service life. The working connection of this invention also includes a feedback oil circuit pressure-tapping check valve, which, in conjunction with the three-way valve of the inlet connection (first connection), can control the output flow rate of the working port, ensuring that the flow rate is only affected by the size of the opening of the working valve stem.

[0031] The working port 42 includes a first port 421 and a second port 422. There are two pressure-tapping check valves 5. The first directional valve stem 41 is connected to the first port 421 via a first oil passage 43; the first directional valve stem 41 is connected to the second port 422 via a second oil passage 44. The pressure oil in the first oil passage 43 and the second oil passage 44 is connected to the spring chamber of the three-way valve 3 via different pressure-tapping check valves 5. This structure facilitates pressure tapping. Compared to traditional working connections where the flow rate is affected not only by the valve stem opening size but also by the input pressure, this invention features two pressure-tapping check valves in the working connection, which can cooperate with the three-way valve to ensure that the output flow rate is not affected by the input pressure. This ensures that the flow rate at the working port is only affected by the opening size of the first directional valve stem in the working connection, reducing system energy consumption.

[0032] This utility model also includes a hydraulic lock assembly 6, disposed on the valve body 1. The hydraulic lock assembly 6 has a first state of being open, connecting the first oil port 421 to the first oil passage 43 and simultaneously connecting the second oil port 422 to the second oil passage 44, and a second state of being closed. Conventional working hydraulic locks are external, fixed to the valve body by mounting screws. The working hydraulic lock assembly of this utility model is directly built into the valve body, resulting in a more compact structure, reducing the risk of oil leakage, and reducing the number of parts, thereby achieving cost reduction.

[0033] The pressure-tapping check valve 5 includes a valve seat 51, a valve ball 52, and a first elastic element 53. The valve seat 51 has an oil inlet 511. The first elastic element 53 abuts against the valve ball 52, pressing the valve ball 52 against the valve seat 51 and blocking the oil inlet 511. This pressure-tapping check valve has a simple structure, is easy to control, and is convenient and reliable to assemble.

[0034] The hydraulic lock assembly 6 includes a piston rod 61, a first control valve 62, and a second control valve 63. The piston rod 61 is disposed within the valve body 1, separating the first oil passage 43 from the second oil passage 44. The first control valve 62 is disposed on the first oil passage 43, and the second control valve 63 is disposed on the second oil passage 44. Specifically, the piston rod 61 has a first position where it is stationary within the valve body 1, placing the hydraulic lock assembly 6 in a closed state, and a second position where it slides and engages with the valve body 1 to open either the first control valve 62 or the second control valve 63 when the hydraulic lock assembly 6 is in the open state. This hydraulic lock assembly structure is more compact, reduces the risk of oil leakage, and reduces the number of parts, thereby reducing costs.

[0035] The first control valve 62 includes a valve sleeve 621, a valve core 622, and a plug 623. The valve core 622 is disposed within the valve sleeve 621 and slides in cooperation with the valve sleeve 621. The valve sleeve 621 is inserted into the valve body 1 and fixed to the valve body 1. The plug 623 is inserted into the end of the valve sleeve 621 and connects to the valve core 622 through a second elastic element 624. Specifically, the piston rod 61 includes a connecting part 611 and a pushing part 612. The connecting part 611 is disposed within the valve body 1 and is used to separate the first oil passage 43 and the second oil passage 44. There are two pushing parts 612, which are located on both sides of the connecting part 611. More specifically, the first control valve and the second control valve have the same or similar structures, resulting in high compatibility of parts and reducing production costs. Simultaneously, the piston rod can be inserted into the valve sleeve to push the valve core, thereby opening the valve core. The piston rod can also open the second control valve in a similar or identical manner.

[0036] The valve body 1 is integrally cast. The valve body of this invention is a casting, which reduces processing complexity, increases production efficiency, and is more suitable for mass production.

[0037] This utility model also includes a proportional electromagnet 7, which is connected to the first directional valve stem 41 and used to drive the first directional valve stem 41 to slide relative to the valve body 1. Since the operation of the sanitation hook-lift vehicle does not require a large flow rate, the electromagnet direct drive working link can be selected for control. Moreover, the electro-proportional control has the advantages of simple structure, low cost, fast response speed, and high control accuracy. That is, the proportional electromagnet has higher accuracy and control performance: more precise control can be achieved through electronic components, improving the accuracy and control performance of the system. In addition, the electro-proportional electromagnet can precisely control the opening of the first directional valve stem and output the required flow rate. In order to ensure the consistency of action and controllable speed, the oil inlet link (first link) uses a three-way valve, which is used in conjunction with the working link with LS pressure tapping check valve to achieve precise control of the working oil port flow rate, which is not affected by pressure.

[0038] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," 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 utility model and simplifying the description. They 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 utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 utility model based on the specific circumstances. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0040] Please note to all technical personnel: Although this utility model has been described according to the specific embodiments above, the inventive concept of this utility model is not limited to this utility model. Any modification that utilizes the inventive concept will be included within the scope of protection of this utility model patent.

Claims

1. A sanitation vehicle control system, comprising a valve body (1), an oil inlet (P), an oil return port (T), and a feedback oil circuit (LS), characterized in that: Also includes: The first joint (2) has an oil inlet (P) and an oil return port (T) located on it. A three-way valve (3) is installed on the first joint (2); the oil inlet (P) is connected to the oil return port (T) through the three-way valve (3); The working link (4) includes a first reversing valve stem (41) and a working oil port (42), wherein the oil inlet (P) is connected through the first reversing valve stem (41); The pressure check valve (5) is connected to the working oil port (42) at the outlet of the first reversing valve stem (41). The pressure oil at the outlet of the first reversing valve stem (41) is connected to the spring chamber of the three-way valve (3) through the pressure check valve (5). The pressure oil at the inlet (P) enters the control chamber of the three-way valve (3), and the pressure oil at the outlet of the pressure check valve (5) enters the spring chamber of the three-way valve (3). The pressure oil and the set spring force of the three-way valve (3) cooperate with each other to control the opening of the three-way valve (3).

2. A sanitation vehicle control system according to claim 1, characterized in that... The working oil port (42) includes a first oil port (421) and a second oil port (422). There are two pressure tapping check valves (5). The first reversing valve stem (41) is connected to the first oil port (421) through the first oil passage (43). The first reversing valve stem (41) is connected to the second oil port (422) through the second oil passage (44). The pressure oil of the first oil passage (43) and the second oil passage (44) is connected to the spring cavity of the three-way valve (3) through different pressure tapping check valves (5).

3. A sanitation vehicle control system according to claim 2, characterized in that... It also includes a hydraulic lock assembly (6) disposed on the valve body (1), the hydraulic lock assembly (6) having a first state of being open so that the first oil port (421) is connected to the first oil passage (43) and the second oil port (422) is connected to the second oil passage (44) and a second state of being closed.

4. A sanitation vehicle control system according to claim 1, characterized in that... The pressure-taking one-way valve (5) includes a valve seat (51), a valve ball (52) and a first elastic element (53). The valve seat (51) is provided with an oil inlet (511). The first elastic element (53) abuts against the valve ball (52) and presses the valve ball (52) against the valve seat (51) and blocks the oil inlet (511).

5. A sanitation vehicle control system according to claim 3, characterized in that... The hydraulic lock assembly (6) includes a piston rod (61), a first control valve (62) and a second control valve (63). The piston rod (61) is located inside the valve body (1) and separates the first oil passage (43) from the second oil passage (44). The first control valve (62) is located on the first oil passage (43) and the second control valve (63) is located on the second oil passage (44).

6. A sanitation vehicle control system according to claim 5, characterized in that... The piston rod (61) has a first position in which it is stationary in the valve body (1) so that the hydraulic lock assembly (6) is in a closed state, and a second position in which it slides with the valve body (1) to open the first control valve (62) or the second control valve (63) when the hydraulic lock assembly (6) is in an open state.

7. A sanitation vehicle control system according to claim 5, characterized in that... The first control valve (62) includes a valve sleeve (621), a valve core (622), and a screw plug (623). The valve core (622) is disposed inside the valve sleeve (621) and slides in cooperation with the valve sleeve (621). The valve sleeve (621) is inserted into the valve body (1) and fixed to the valve body (1). The screw plug (623) is inserted into the end of the valve sleeve (621) and connected to the valve core (622) through the second elastic element (624).

8. A sanitation vehicle control system according to claim 6, characterized in that... The piston rod (61) includes a connecting part (611) and a pushing part (612). The connecting part (611) is located inside the valve body (1) and is used to separate the first oil passage (43) and the second oil passage (44). There are two pushing parts (612) and they are located on both sides of the connecting part (611).

9. A sanitation vehicle control system according to claim 1, characterized in that... The valve body (1) is integrally cast.

10. A sanitation vehicle control system according to claim 1, characterized in that... It also includes a proportional electromagnet (7), which is connected to the first directional valve stem (41) and is used to drive the first directional valve stem (41) to slide relative to the valve body (1).

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