Hydraulic system for cleaning equipment

Abstract

A hydraulic system for cleaning equipment comprises a plurality of functional oil way units connected to the same input oil way and oil return oil way, and each functional oil way unit is provided with at least one oil way output port so as to achieve the functions needed by a motor sweeper. The multi-functional oil way device is characterized in that the multiple functional oil way units comprise a dry-wet switching unit, a sweeping disc suction nozzle lifting unit, a sweeping disc swing unit, a motor speed adjusting unit and a motor rotating unit, and the dry-wet switching unit and the sweeping disc swing unit are each provided with two oil way output ports so that dry-wet switching and sweeping disc swing direction switching can be achieved respectively. The utility model has the beneficial effects that a plurality of functional oil way units are connected on the same input oil way and oil return oil way, so that the system structure is greatly simplified, the pipeline laying and complex connection are reduced, and the fault points and the maintenance cost are reduced.

Description

Technical Field

[0001] The utility model relates to a hydraulic system, in particular to a hydraulic system used for cleaning equipment. Background Art

[0002] The hydraulic system of a sweeper is the key to ensuring the efficient operation of its cleaning function. It is mainly composed of hydraulic pumps, hydraulic cylinders, hydraulic motors, control valves and oil tanks. The hydraulic pump is responsible for converting mechanical energy into hydraulic energy to provide power for the system. Taking an industrial floor scrubber as an example, its hydraulic equipment is the core part to ensure efficient cleaning operations. This hydraulic system is mainly composed of hydraulic pumps, hydraulic cylinders, hydraulic motors, control valves and oil tanks. The hydraulic pump converts mechanical energy into hydraulic energy to provide a power source for the entire system. As an actuator, the hydraulic cylinder is responsible for realizing key actions of the floor scrubber such as lifting and lowering the brush plate and dumping the sewage tank. The hydraulic motor drives the brush plate to rotate at high speed to powerfully remove stains on the ground. The control valve accurately adjusts the flow, pressure and direction of the hydraulic oil to ensure the orderly operation of each component. The oil tank stores sufficient hydraulic oil to provide sufficient medium for the continuous and stable operation of the system. These components work together to enable the floor scrubber to complete the cleaning task efficiently and stably, greatly improving the cleaning effect and work efficiency.

[0003] At present, the working environment of the sweeper is complex and the functions are diverse, such as sweeping (sweeping disc rotation), sweeping disc lifting, dry-wet switching, etc. However, the hydraulic system under the existing technology is difficult to fully adapt to all the functions of the sweeper. These hydraulic systems have limitations in pressure regulation and flow control, and cannot accurately meet the different working conditions of the sweeper, resulting in low cleaning efficiency and increased component wear. A more suitable hydraulic system is urgently needed to improve the overall performance of the sweeper. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a hydraulic system for cleaning equipment that better matches the functions required by a sweeper.

[0005] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows: a hydraulic system for cleaning equipment, comprising a plurality of functional oil circuit units connected to the same input oil circuit and return oil circuit, the plurality of functional oil circuit units are each provided with at least one oil circuit output port to realize the functions required by the sweeper, the plurality of functional oil circuit units include a dry-wet switching unit, a sweeping disc suction nozzle lifting unit, a sweeping disc swinging unit, a motor speed regulation unit and a motor rotation unit, the dry-wet switching unit and the sweeping disc swinging unit are each provided with two oil circuit output ports to respectively realize the dry-wet switching and the switching of the sweeping disc swinging direction, the dry-wet switching unit and the sweeping disc swinging unit are each provided with a switching valve connected between the input oil circuit and the return oil circuit and connected to different oil circuit output ports by switching electrical signals, and different oil circuit output ports of the dry-wet switching unit and the sweeping disc swinging unit are each provided with a one-way valve that allows fluid to pass through after the oil circuit output port is opened by the switching valve.

[0006] The beneficial effects of the utility model are as follows: the hydraulic system for cleaning equipment has many beneficial effects. First, connecting multiple functional oil circuit units to the same input oil circuit and return oil circuit greatly simplifies the system structure, reduces pipeline laying and complex connections, and reduces failure points and maintenance costs. The dry-wet switching unit and the sweeping disc swing unit not only realize flexible switching of functions by setting two oil circuit output ports and corresponding switching valves and one-way valves, but also have a self-locking function. After the dry-wet switching or the sweeping disc swing direction switching, the one-way valve can effectively prevent the fluid from flowing back, ensure the stable operation of the system, avoid disorder during function switching, and improve the accuracy and reliability of the cleaning operation. In addition, each functional oil circuit unit is independently set to meet the different functional requirements of the sweeper in a targeted manner, such as the lifting and lowering of the sweeping disc suction nozzle, the motor speed regulation and rotation, etc., so that the sweeper can operate efficiently under different working conditions, comprehensively improving the overall performance and work efficiency of the cleaning equipment.

[0007] Furthermore, a connecting channel is provided between the one-way valve on one of the oil circuit output ports of the dry-wet switching unit and the sweeping disc swing unit and the one-way valve on the other oil circuit output port, one end of the connecting channel is provided between the switching valve of the unit and the one-way valve on one of the oil circuit output ports, and the other end is provided on the inlet end of the one-way valve connected to the other oil circuit output port.

[0008] In the above hydraulic system, it is of great significance to set a connecting channel between the two one-way valves in the dry-wet switching unit and the sweeping disc swing unit. This structure further optimizes the stability and functionality of the system. The connecting channel can establish a connection between the oil circuits corresponding to the two one-way valves. When the switching valve changes the oil circuit conduction state, the connecting channel can balance the pressure of the two oil circuit output ports to avoid abnormal operation or damage of the one-way valve due to excessive pressure difference.

[0009] Furthermore, the sweeping disc suction nozzle lifting unit is provided with an oil circuit for controlling the rise and an oil circuit for controlling the descent, and a switching valve that switches different oil circuit output ports through electrical signals, and at least one speed regulating valve is provided in the oil circuit for controlling the rise, and a one-way valve for preventing the backflow of the fluid in the oil circuit for controlling the rise is provided between the input end of one of the several speed regulating valves closest to the switching valve of the unit and the switching valve of the unit.

[0010] This structural design of the sweeping disc suction nozzle lifting unit brings many advantages. The oil circuits that control the rise and fall respectively, and the valves switched by electrical signals, can realize the precise control of the sweeping disc suction nozzle lifting action, and meet the flexible adjustment requirements of the sweeping disc suction nozzle height in different cleaning scenarios. The setting of the speed regulating valve is crucial, which can adjust the oil flow, so as to accurately control the rising speed of the sweeping disc suction nozzle. This can not only avoid the impact and damage of the equipment caused by the rising speed being too fast, but also ensure the rapid lifting of the sweeping disc suction nozzle when needed, so as to improve the cleaning efficiency. A one-way valve is set at the input end of the speed regulating valve near the switching valve to effectively prevent the backflow of the fluid in the control rising oil circuit. This enables the system to stably maintain the height of the sweeping disc suction nozzle after the rising action is completed, avoiding the accidental descent of the sweeping disc suction nozzle due to oil reflux, and further improving the stability of the entire hydraulic system and the reliability of the cleaning operation.

[0011] Furthermore, a pressure relief passage is provided on the oil circuit for controlling descent in the sweeping disc suction nozzle lifting unit, one end of which is connected to a one-way valve in the oil circuit for controlling ascent and is connected to an inlet end of the one-way valve.

[0012] In the sweeping disc suction nozzle lifting unit, the design of connecting one end of the oil circuit that controls the descent to the inlet end of the one-way valve in the oil circuit that controls the ascent brings significant advantages. It cleverly builds a connection between the two oil circuits, which helps to balance the pressure of the ascending and descending oil circuits. During the descent of the sweeping disc suction nozzle, this connection structure can make the descent action smoother by taking advantage of the partial pressure characteristics of the ascending oil circuit, avoiding the loss of control of the descent speed due to sudden changes in pressure. At the same time, this connection method further enhances the stability of the entire system, and works in synergy with previous speed regulating valves, one-way valves and other components to allow the sweeping disc suction nozzle to operate accurately and reliably during the lifting process, thereby comprehensively improving the working performance and efficiency of the cleaning equipment.

[0013] Furthermore, the motor speed regulating unit and the motor rotating unit are both provided with switching valves for connecting different oil circuit output ports through electrical signal switching, and speed regulating valves are provided on different oil circuit output ports of the motor speed regulating unit.

[0014] In the hydraulic system of the cleaning equipment, the motor speed control unit and the motor rotation unit are connected to different oil output ports by switching valves controlled by electrical signals. This design greatly improves the control flexibility of the system. Speed ​​control valves are set at different oil output ports of the motor speed control unit to accurately adjust the oil flow according to actual work needs, thereby achieving precise control of the motor speed. Whether it is the requirements for cleaning intensity in different cleaning scenarios or the consideration of equipment operation stability under complex working conditions, targeted adjustments can be made through the speed control valve. This not only ensures the efficient operation of the cleaning equipment, but also effectively extends the service life of the motor and improves the reliability and work efficiency of the overall equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the hydraulic oil circuit of an embodiment of the utility model;

[0016] Figure 2 It is a schematic diagram of the hydraulic oil circuit of the dry-wet switching unit, the sweeping plate suction nozzle lifting unit and the sweeping plate swing unit of the embodiment of the utility model;

[0017] Figure 3 It is a schematic diagram of the hydraulic oil circuit of the motor speed regulating unit and the motor rotating unit according to an embodiment of the utility model. DETAILED DESCRIPTION

[0018] It should be noted that, in this embodiment, the input oil circuits are P1, P2 and P3, the return oil circuits are T1 and T2, and A1-A6 and B1-B6 are the oil circuit output ports of each functional oil circuit unit.

[0019] The hydraulic system for cleaning equipment of the present utility model is shown in Figures 1-3: it includes several functional oil circuit units connected to the same input oil circuit and return oil circuit, and the several functional oil circuit units are each provided with at least one oil circuit output port to realize the functions required by the sweeper, and the several functional oil circuit units include a dry-wet switching unit 1, a sweeping plate suction nozzle lifting unit 2, a sweeping plate swing unit 3, a motor speed regulating unit 4 and a motor rotating unit 5. Each functional oil circuit unit is introduced below.

[0020] The dry-wet switching unit 1 is provided with two oil circuit output ports (B6 and A6) to realize the switching of dry-wet switching. The dry-wet switching unit 1 is also provided with a switching valve A11 connected between the input oil circuit and the return oil circuit and connected to different oil circuit output ports through electrical signal switching. Different oil circuit output ports (B6 and A6) of the dry-wet switching unit 1 are provided with a one-way valve A12 that allows fluid to pass through after the oil circuit output port is connected through the switching valve A11. A connecting channel 13 is provided between the one-way valve A12 on one of the oil circuit output ports of the dry-wet switching unit 1 and the one-way valve A12 on the other oil circuit output port. One end of the connecting channel A13 is provided between the switching valve A11 of the unit and the one-way valve A12 on one of the oil circuit output ports, and the other end is provided on the inlet end of the one-way valve A12 connected to the other oil circuit output port. Its working principle is as follows: after the switching valve A11 switches the output oil circuit output port connection, the one-way valve A12 can not only ensure that the pressure will not be overloaded, but also ensure that the pressure in the other oil circuit output port will not affect the oil circuit output port after switching.

[0021] The sweeping disc swing unit 3 is provided with two oil circuit output ports (B4 and A4) to realize the switching of the sweeping disc swing direction. The sweeping disc swing unit 3 is also provided with a switching valve C31 connected between the input oil circuit and the return oil circuit and connected to different oil circuit output ports through electrical signal switching. The different oil circuit output ports (B4 and A4) of the sweeping disc swing unit 3 are provided with a one-way valve 32 that allows fluid to pass through after the oil circuit output port is connected by the switching valve C31. A connecting channel 33 is provided between the one-way valve 32 on one of the oil circuit output ports of the sweeping disc swing unit 3 and the one-way valve 32 on the other oil circuit output port. One end of the connecting channel B33 is provided between the switching valve C31 of the unit and the one-way valve 32 on one of the oil circuit output ports, and the other end is provided on the inlet end of the one-way valve 32 connected to the other oil circuit output port. The oil circuit principle of the sweeping disc swing unit 3 is the same as that of the dry-wet switching unit 1, but the functions it realizes are different.

[0022] The sweeping plate suction nozzle lifting unit 2 is provided with an oil circuit (A5) for controlling the rise and an oil circuit (B5) for controlling the descent, and a switching valve B24 connected to different oil circuit output ports through electrical signal switching. At least one speed regulating valve 22 is provided in the oil circuit (A5) for controlling the rise, and a one-way valve B21 for preventing the fluid in the oil circuit (A5) for controlling the rise is provided between its input end and the switching valve B24 of the unit among the several speed regulating valves 22 closest to the switching valve B24 of the unit; the oil circuit for controlling the descent in the sweeping plate suction nozzle lifting unit 2 is provided with a pressure relief channel 23, one end of which is connected to the one-way valve B21 in the oil circuit for controlling the rise and is connected to the inlet end of the one-way valve B21. Its working principle is as follows: after the rising action is completed, the one-way valve B21 set in A5 can stably maintain the height of the sweeping disc suction nozzle to avoid accidental lowering of the sweeping disc suction nozzle due to oil reflux, and during the lowering process of the sweeping disc suction nozzle, through this connection structure, the partial pressure characteristics of the rising oil circuit can be used to make the lowering action smoother, avoiding the loss of control of the lowering speed due to sudden pressure changes.

[0023] The motor speed regulating unit 4 is provided with a switching valve 42 for connecting different oil circuit output ports (B2 and A2) through electrical signal switching, and speed regulating valves 41 are provided on different oil circuit output ports of the motor speed regulating unit 4. The two speed regulating valves 41 can be provided with different fluid passing cross sections to achieve different speeds.

[0024] The motor rotating unit 5 is provided with a switching valve D51 for switching the connection between different oil output ports (B1 and A1) through an electrical signal.

[0025] The above embodiment is only one of the preferred specific embodiments of the present invention. Common changes and substitutions made by those skilled in the art within the technical solution of the present invention are all included in the protection scope of the present invention.

Claims

1. A hydraulic system for cleaning equipment, comprising a plurality of functional oil circuit units connected to the same input oil circuit and return oil circuit, each of the plurality of functional oil circuit units being provided with at least one oil circuit output port to realize the functions required by the cleaning vehicle, characterized in that: Several functional oil circuit units include a dry-wet switching unit, a sweeping disc suction nozzle lifting unit, a sweeping disc swinging unit, a motor speed regulation unit and a motor rotation unit. The dry-wet switching unit and the sweeping disc swinging unit are both provided with two oil circuit output ports to respectively realize dry-wet switching and switching of the sweeping disc swinging direction. The dry-wet switching unit and the sweeping disc swinging unit are both provided with switching valves connected between the input oil circuit and the return oil circuit and connected to different oil circuit output ports through electrical signal switching. Different oil circuit output ports of the dry-wet switching unit and the sweeping disc swinging unit are both provided with one-way valves that allow fluid to pass through after the oil circuit output port is opened by the switching valve.

2. The hydraulic system for cleaning equipment according to claim 1, characterized in that: A connecting channel is arranged between the one-way valve on one of the oil circuit output ports of the dry-wet switching unit and the sweeping disc swing unit and the one-way valve on the other oil circuit output port, one end of the connecting channel is arranged between the switching valve of the unit and the one-way valve on one of the oil circuit output ports, and the other end is arranged on the inlet end of the one-way valve on the other oil circuit output port.

3. The hydraulic system for cleaning equipment according to claim 1, characterized in that: The sweeping disc suction nozzle lifting unit is provided with an oil circuit for controlling the rise and an oil circuit for controlling the descent, as well as a switching valve that switches different oil circuit output ports through electrical signals. The oil circuit for controlling the rise is provided with at least one speed regulating valve, and one of the several speed regulating valves closest to the switching valve of the unit is provided with a one-way valve between its input end and the switching valve of the unit to prevent the backflow of the fluid in the oil circuit for controlling the rise.

4. The hydraulic system for cleaning equipment according to claim 3, characterized in that: The oil circuit for controlling the descent in the sweeping disc suction nozzle lifting unit is provided with a pressure relief passage, one end of which is connected to a one-way valve in the oil circuit for controlling the ascent and is connected to the inlet end of the one-way valve.

5. The hydraulic system for cleaning equipment according to claim 1, characterized in that: The motor speed regulating unit and the motor rotating unit are both provided with switching valves for connecting different oil circuit output ports through electrical signal switching, and speed regulating valves are provided on different oil circuit output ports of the motor speed regulating unit.

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