Hydraulic pilot system for remotely controlling excavator

Abstract

The hydraulic pilot system comprises an oil tank, a pilot pump, an overflow valve, a filter, a one-way valve, an energy accumulator, a safety handle electromagnetic valve, an electromagnetic reversing valve, a left foot valve, a right foot valve, a left handle valve, a right handle valve, a shuttle valve and an electric proportional valve. A port P of the electromagnetic reversing valve is connected with a port A of the safety handle electromagnetic valve, a port T of the electromagnetic reversing valve is connected with an oil return tank pipeline, a port A pipeline of the electromagnetic reversing valve is connected with a port P of the electric proportional valve, and a port B pipeline of the electromagnetic reversing valve is connected with oil inlets of the left foot valve, the right foot valve, the left handle valve and the right handle valve. Due to the application of the remote control technology of the excavator, the operation efficiency is improved, the labor cost is reduced, stable operation can be achieved in the complex and severe environment, meanwhile, the safety of personnel is guaranteed, operators are far away from dangerous areas, and the possibility of accidents is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of remote control of excavators, in particular to a hydraulic pilot system for remote control of excavators. Background Art

[0002] Excavators are a type of mechanized equipment widely used in construction machinery, mainly used for excavation, demolition, transportation and other tasks. In traditional excavator operations, operators are required to perform manual control operations in the cab. However, due to the complex and changeable engineering environment, operators may face risks such as collapse, landslides, and collisions during manual operations. In particular, in multiple high-risk operating environments such as the demolition of large buildings (structures), the demolition of equipment and facilities, the demolition of chemical equipment, and the demolition of bridges, traditional manual operation methods pose a high safety risk. In order to improve work efficiency and ensure safety, it is urgent to take measures and technical means to overcome these shortcomings.

[0003] Application No. 201921240552.4 discloses a hydraulic pilot system for an excavator, which connects a remote-controlled proportional solenoid valve in series with a manually controlled pilot handle and foot valve. When the controller does not receive a remote control signal and the proportional solenoid valve does not operate, the pilot handle and foot valve are operated in the cab to control the main valve of the excavator, so as to realize all the operations of the excavator in the cab; when the controller receives a remote control signal, the controller controls the operation of the proportional solenoid valve and the main valve, and further controls all the operations of the excavator, so as to realize remote control. However, during manual operation, the pilot hydraulic oil first passes through the operated pilot handle valve or pilot foot valve, and then passes through the corresponding proportional solenoid valve, before reaching the hydraulic control valve stem position of the main valve, thereby controlling the operation of the excavator; due to the serial connection of the proportional solenoid valve, the inlet / return oil of the pilot hydraulic oil generates resistance, which is reflected in the manual operation of the excavator, and all the operations are delayed and stuck. Utility Model Content

[0004] The utility model aims to provide a hydraulic pilot system for remote control of an excavator to solve the problems in the prior art.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a hydraulic pilot system for remote control of an excavator, comprising a fuel tank, a pilot pump, a relief valve, a filter, a check valve, an accumulator, a safety handle solenoid valve, a solenoid reversing valve, a left foot valve, a right foot valve, a left handle valve, a right handle valve, a shuttle valve, and an electric proportional valve;

[0006] The P port of the electromagnetic reversing valve is connected to the A port of the safety handle electromagnetic valve, the T port of the electromagnetic reversing valve is connected to the oil tank pipeline, the A port pipeline of the electromagnetic reversing valve is connected to the P port of the electric proportional valve, and the B port pipeline of the electromagnetic reversing valve is connected to the oil inlet of the left foot valve, the right foot valve, the left handle valve and the right handle valve;

[0007] The electric proportional valve is connected to the shuttle valve correspondingly; the T port of the electric proportional valve is connected back to the oil tank, and the A port of the electric proportional valve is connected to the A port of the corresponding shuttle valve respectively; the B port of the shuttle valve is connected to the oil outlet of the corresponding left foot valve, right foot valve, left handle valve and right handle valve; the C port of the shuttle valve is connected to the corresponding main valve stem;

[0008] The oil return ports of the left foot valve, the right foot valve, the left handle valve and the right handle valve are connected to the oil tank.

[0009] Preferably, the model of the electric proportional valve is SV1-SV12.

[0010] Preferably, the shuttle valve is of model FB1-FB12.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. Manual control and remote control are switched through an electromagnetic reversing valve, and the two do not interfere with each other during operation; remote control of the excavator not only improves operating efficiency and reduces labor costs, but also enables stable operation in complex and harsh environments, while ensuring personnel safety, keeping operators away from dangerous areas and reducing the possibility of accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0014] Figure 1 It is the principle diagram of the utility model;

[0015] Figure 2 It is a schematic diagram of the structure of D of the utility model.

[0016] In the figure: 1. Oil tank; 2. Pilot pump; 3. Overflow valve; 4. Filter; 5. Check valve; 6. Accumulator; 7. Safety handle solenoid valve; 8. Solenoid reversing valve; 9. Left foot valve; 10. Right foot valve; 11. Left handle valve; 12. Right handle valve; 13. Shuttle valve; 14. Electric proportional valve. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is claimed, but merely represents selected embodiments of the utility model.

[0018] See also Figure 1-2 In the embodiment of the utility model, a hydraulic pilot system for remote control of an excavator includes an oil tank 1, a pilot pump 2, a relief valve 3, a filter 4, a one-way valve 5, an accumulator 6, a safety handle solenoid valve 7, an electromagnetic reversing valve 8, a left foot valve 9, a right foot valve 10, a left handle valve 11, a right handle valve 12, a shuttle valve 13, and an electric proportional valve 14; the model of the electric proportional valve 14 is SV1-SV12; the model of the shuttle valve 13 is FB1-FB12.

[0019] The P port of the electromagnetic reversing valve 8 is connected to the A port of the safety handle electromagnetic valve 7, the T port of the electromagnetic reversing valve 8 is connected to the oil tank pipeline, the A port pipeline of the electromagnetic reversing valve 8 is connected to the P port of the electric proportional valve 14, and the B port pipeline of the electromagnetic reversing valve 8 is connected to the oil inlet of the left foot valve 9, the right foot valve 10, the left handle valve 11 and the right handle valve 12; the electric proportional valve 14 is connected to the shuttle valve 13 accordingly; the T port of the electric proportional valve 14 is connected to the oil tank, and the A port of the electric proportional valve 14 is connected to the A port of the corresponding shuttle valve 13 respectively; the B port of the shuttle valve 13 is connected to the corresponding left foot valve 9, the right foot valve 10, the left handle valve 11 and the right handle valve 12 oil outlet; the C port of the shuttle valve 13 The port is connected to the corresponding main valve stem; when the electromagnetic reversing valve 8 has no signal, the excavator is manually controlled and can be operated in the cab. The hydraulic oil passes through the pilot pump 2, the filter 4, the check valve 5, the safety handle electromagnetic valve 7, the electromagnetic reversing valve 8, the left foot valve 9 (or the right foot valve 10 or the left handle valve 11 or the right handle valve 12), and the shuttle valve 13, and finally reaches the main valve stem to control the movement of the excavator; when the electromagnetic reversing valve 8 has a signal, the excavator is remotely controlled and can be remotely controlled to operate. The hydraulic oil passes through the pilot pump 2, the filter 4, the check valve 5, the safety handle electromagnetic valve 7, the electromagnetic reversing valve 8, the electric proportional valve 14, and the shuttle valve 13, and finally reaches the main valve stem to control the movement of the excavator.

[0020] The oil return ports of the left foot valve 9 , the right foot valve 10 , the left handle valve 11 , and the right handle valve 12 are connected to the oil tank 1 .

[0021] The working principle of the utility model is: when the electromagnetic reversing valve 8 has no signal, the excavator is manually controlled and can be operated in the cab, and the hydraulic oil passes through the pilot pump 2, the filter 4, the one-way valve 5, the safety handle electromagnetic valve 7, the electromagnetic reversing valve 8, the left foot valve 9 (or the right foot valve 10 or the left handle valve 11 or the right handle valve 12), and the shuttle valve 13, and finally reaches the main valve stem to control the movement of the excavator; when the electromagnetic reversing valve 8 has a signal, the excavator is remotely controlled and can be remotely controlled to operate, and the hydraulic oil passes through the pilot pump 2, the filter 4, the one-way valve 5, the safety handle electromagnetic valve 7, the electromagnetic reversing valve 8, the electric proportional valve 14, and the shuttle valve 13, and finally reaches the main valve stem to control the movement of the excavator.

[0022] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. 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 hydraulic pilot system for remote control of an excavator, characterized in that: It comprises an oil tank (1), a pilot pump (2), a relief valve (3), a filter (4), a check valve (5), an accumulator (6), a safety handle solenoid valve (7), a solenoid reversing valve (8), a left foot valve (9), a right foot valve (10), a left handle valve (11), a right handle valve (12), a shuttle valve (13), and an electric proportional valve (14); The P port of the electromagnetic reversing valve (8) is connected to the A port of the safety handle electromagnetic valve (7), the T port of the electromagnetic reversing valve (8) is connected to the oil tank pipeline, the A port pipeline of the electromagnetic reversing valve (8) is connected to the P port of the electric proportional valve (14), and the B port pipeline of the electromagnetic reversing valve (8) is connected to the oil inlets of the left foot valve (9), the right foot valve (10), the left handle valve (11) and the right handle valve (12); The electric proportional valve (14) is connected to the shuttle valve (13) correspondingly; the T port of the electric proportional valve (14) is connected to the oil tank, and the A port of the electric proportional valve (14) is connected to the A port of the corresponding shuttle valve (13); the B port of the shuttle valve (13) is connected to the oil outlet of the corresponding left foot valve (9), right foot valve (10), left handle valve (11) and right handle valve (12); the C port of the shuttle valve (13) is connected to the corresponding main valve stem; The oil return ports of the left foot valve (9), the right foot valve (10), the left handle valve (11) and the right handle valve (12) are connected to the oil tank (1).

2. The hydraulic pilot system for remote control of an excavator according to claim 1, characterized in that: The model of the electric proportional valve (14) is SV1-SV12.

3. The hydraulic pilot system for remote control of an excavator according to claim 1, characterized in that: The shuttle valve (13) has a model number of FB1-FB12.

Images