PLC program control hydraulic oil alarm device

Abstract

The utility model relates to the technical field of hydraulic oil control, in particular to a PLC program control hydraulic oil alarm device which comprises an engine, a lifting pump and a steering pump, the lifting pump is located on the side wall of the steering pump and matched with the engine, and an alarm structure is arranged at the lower end of the lifting pump and comprises a steering system. A hydraulic oil tank is arranged on the side wall of the steering system, a hydraulic oil level sensor is arranged in the hydraulic oil tank, a lifting system is arranged at the upper end of the engine, a pipeline is connected between the steering pump and the steering system, and a floater is arranged on the circumferential surface of the hydraulic oil level sensor. The hydraulic oil level sensor outputs at least five alarm modes when detecting the change condition of the hydraulic oil level in the hydraulic oil tank, a driver is prompted to take corresponding measures in time, abnormal damage of a steering pump and a lifting pump when the oil level is insufficient is avoided, the defect that leakage does not give an alarm after an electric wheel runs is overcome, and practicability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic oil control, in particular to a PLC program-controlled hydraulic oil alarm device. Background Art

[0002] At present, the application of hydraulic electric wheels has become quite common in engineering vehicles. These vehicles use hydraulic systems to realize the operation of steering systems and lifting systems. The hydraulic system plays a vital role in these vehicles. It is not only responsible for controlling the steering of the vehicle and ensuring the flexibility and stability of the vehicle under various complex working conditions, but also responsible for driving the lifting system, so that the vehicle can easily load, unload and carry out cargo transportation. Through the precise control of the hydraulic system, these engineering vehicles can complete various heavy tasks efficiently and safely, greatly improving work efficiency and operational convenience.

[0003] The hydraulic system in the existing device usually works under high load when in use, which can easily lead to overheating of the hydraulic system and insufficient power. For the steering system, heavy steering and insensitivity may occur. When the existing hydraulic system is damaged and alarms are issued, light displays are usually used for prompting. However, due to the large number of internal components of the hydraulic system, the staff cannot know the specific location of the damage, making it impossible for the staff to take timely measures. The practicality is insufficient and needs to be improved. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a PLC program-controlled hydraulic oil alarm device, which solves the technical problem of insufficient practicality of the prior devices.

[0005] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] A PLC program-controlled hydraulic oil alarm device comprises an engine, a lifting pump and a steering pump, wherein the lifting pump is located on the side wall of the steering pump, the lifting pump is adapted to the engine, and an alarm structure is provided at the lower end of the lifting pump;

[0007] The alarm structure includes a steering system, a hydraulic oil tank is provided on the side wall of the steering system, a hydraulic oil level sensor is provided inside the hydraulic oil tank, a lifting system is provided at the upper end of the engine, and a pipeline is connected between the lifting system and the lifting pump.

[0008] Preferably, a pipeline is connected between the steering pump and the steering system, a float is provided on the circumferential surface of the hydraulic oil level sensor, and a steering oil inlet pipe is provided between the steering pump and the oil port of the hydraulic oil tank.

[0009] Preferably: a lifting oil inlet pipe is provided between the lifting pump and the oil port of the hydraulic oil tank, a steering oil return pipe is provided between the steering system and the oil port of the hydraulic oil tank, and a lifting oil return pipe is provided between the lifting system and the oil port of the hydraulic oil tank.

[0010] The utility model has the following beneficial effects:

[0011] 1. By adopting a PLC controller for control, the hydraulic oil level sensor detects the change of the hydraulic oil level in the hydraulic oil tank and outputs at least five alarm modes, prompting the driver to take timely countermeasures to avoid abnormal damage to the steering pump and lifting pump when the oil level is insufficient. This solves the problem of no alarm when leakage occurs after the electric wheel is running, and improves practicality.

[0012] Second, because the device can accurately alarm in various situations through the PLC controller, it greatly improves the staff's understanding of the cause of the hydraulic oil level problem, facilitates the staff to take corresponding measures, and further improves practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and to implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings.

[0014] Figure 1 This is a planar structural diagram of the hydraulic device of the electric wheel of the utility model;

[0015] Figure 2 This is the plan program diagram of the PLC controller for the hydraulic oil level sensor alarm of the utility model.

[0016] Legend: 1. Engine; 2. Steering system; 3. Lifting system; 4. Lifting pump; 5. Steering pump; 6. Hydraulic oil tank; 7. Hydraulic oil level sensor; 8. Float; 9. Steering oil inlet pipe; 10. Lifting oil inlet pipe; 11. Steering oil return pipe; 12. Lifting oil return pipe. DETAILED DESCRIPTION

[0017] The embodiment of the present application effectively solves the technical problem of insufficient practicality of existing devices by providing a PLC programmable hydraulic oil alarm device. By adopting a PLC controller for control, the hydraulic oil level sensor detects the change of the hydraulic oil level in the hydraulic oil tank and outputs at least five alarm modes, prompting the driver to take timely countermeasures to avoid abnormal damage to the steering pump and lifting pump when the oil level is insufficient, and solves the disadvantage of no alarm for leakage after the electric wheel is running, thereby improving practicality. In addition, since the device can complete accurate alarms in various situations through the PLC controller, it greatly improves the staff's awareness of the cause of the hydraulic oil level problem, facilitates the staff to take corresponding measures, and further improves practicality. Example

[0018] like Figure 1-2 As shown, the technical solution in the embodiment of the present application effectively solves the technical problem of insufficient practicality of the existing device. The overall idea is as follows:

[0019] In response to the problems existing in the prior art, the utility model provides a PLC program-controlled hydraulic oil alarm device, which includes an engine 1, a lifting pump 4 and a steering pump 5. The lifting pump 4 is located on the side wall of the steering pump 5 and is adapted to the engine 1. An alarm structure is provided at the lower end of the lifting pump 4.

[0020] The alarm structure includes a steering system 2, a hydraulic oil tank 6 is provided on the side wall of the steering system 2, a hydraulic oil level sensor 7 is provided inside the hydraulic oil tank 6, a lifting system 3 is provided at the upper end of the engine 1, a pipeline is connected between the lifting system 3 and the lifting pump 4, and a pipeline is connected between the steering pump 5 and the steering system 2. A float 8 is provided on the circumferential surface of the hydraulic oil level sensor 7. The engine 1 can provide the necessary oil output pressure for the lifting pump 4 and the steering pump 5. The hydraulic oil level sensor 7 can detect the hydraulic oil condition inside the hydraulic oil tank 6 in real time;

[0021] The hydraulic oil level of the hydraulic oil tank 6 has three working positions: the initial oil level when the engine 1 is not started, the oil level when the steering system 2 is working after the engine 1 is started, and the oil level when the lifting system 3 is working after the engine 1 is started. The device is controlled by a PLC controller so that the hydraulic oil level sensor 7 detects the changes in the hydraulic oil level inside the hydraulic oil tank 6 and outputs at least five alarm modes, prompting the driver to take timely countermeasures to avoid abnormal damage to the steering pump 5 and the lifting pump 4 when the oil level is insufficient, solving the problem of no alarm when leakage occurs after the electric wheel is running, and improving practicality.

[0022] A steering oil inlet pipe 9 is provided between the steering pump 5 and the oil port of the hydraulic oil tank 6, a lifting oil inlet pipe 10 is provided between the lifting pump 4 and the oil port of the hydraulic oil tank 6, a steering oil return pipe 11 is provided between the steering system 2 and the oil port of the hydraulic oil tank 6, and a lifting oil return pipe 12 is provided between the lifting system 3 and the oil port of the hydraulic oil tank 6;

[0023] By providing the steering oil inlet pipe 9, the lifting oil inlet pipe 10, and the steering oil return pipe 11, the necessary oil pressure can be provided for the lifting system 3 and the steering system 2;

[0024] Since the device can complete accurate alarms in various situations through the PLC controller, it greatly improves the staff's understanding of the causes of hydraulic oil level problems, facilitates the staff to take corresponding measures, and further improves practicality.

[0025] Working principle:

[0026] The first step is to set up a hydraulic oil level sensor 7 to detect the hydraulic oil condition inside the hydraulic oil tank 6 in real time (the hydraulic oil level sensor 7 is controlled by an S7-200 model PLC. Due to the use of the PLC, the extended input signal acquisition method includes but is not limited to the digital signal of the reed switch, the analog signal of the capacitive sensor, the analog signal of the ultrasonic sensor, the analog signal of the laser sensor, etc.);

[0027] When the limit oil level switch is activated (I0.4 input high potential), the cab sound and light alarm continuously outputs "Warning! The hydraulic oil level is extremely low, please turn off the engine and check immediately" (Q0.4 output high potential). When static, if the static oil level switch is activated (I0.0 input high potential), the cab sound and light alarm outputs "The hydraulic oil level is normal" (keep Q0.0 high potential output for 2 seconds, the key switch is powered off and reset); if the static oil level switch does not operate (I0.0 input low potential), the cab sound and light alarm continuously outputs "Attention! The hydraulic oil level is low, please pay attention to add it" (Q0.1 high potential output, the key switch is powered off and reset). When starting (the bucket is not lifted), if the oil level switch is activated If the steering oil leakage level switch is actuated (I0.1 input high potential), the cab sound and light alarm will continuously output "Attention! The hydraulic oil level is low, please pay attention to add it" (Q0.1 high potential output, key switch power off reset); if the steering oil leakage level switch is actuated (I0.2 high potential input), the cab sound and light alarm will continuously output "Warning! There is a leak in the steering system 2, please pull over and turn off the engine for inspection" (Q0.2 high potential output, key switch power off reset). When the bucket is lifted, if the lifting oil leakage level switch is actuated (I0.3 high potential input), the cab sound and light alarm will continuously output "Warning! There is a leak in the lifting system 3, please pull over and turn off the engine for inspection" (Q0.3 high potential output, key switch power off reset).

[0028] Finally, it should be noted that the above embodiments are merely examples for the purpose of illustrating the present invention and are not intended to limit the embodiments. Those skilled in the art will readily appreciate that other variations or modifications based on the above description are possible. It is not necessary and impossible to provide an exhaustive list of all possible embodiments. However, any obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A PLC program-controlled hydraulic oil alarm device, characterized in that: It comprises an engine (1), a lifting pump (4) and a steering pump (5), wherein the lifting pump (4) is located on a side wall of the steering pump (5), the lifting pump (4) is adapted to the engine (1), and an alarm structure is provided at the lower end of the lifting pump (4); The alarm structure comprises a steering system (2), a hydraulic oil tank (6) is provided on a side wall of the steering system (2), and a hydraulic oil level sensor (7) is provided inside the hydraulic oil tank (6).

2. A PLC program-controlled hydraulic oil alarm device according to claim 1, characterized in that: The upper end of the engine (1) is provided with a lifting system (3); Wherein, a pipeline is connected between the lifting system (3) and the lifting pump (4).

3. A PLC program-controlled hydraulic oil alarm device as claimed in claim 2, characterized in that: A pipeline is connected between the steering pump (5) and the steering system (2).

4. A PLC program-controlled hydraulic oil alarm device as claimed in claim 3, characterized in that: A float (8) is provided on the circumferential surface of the hydraulic oil level sensor (7).

5. A PLC program-controlled hydraulic oil alarm device as claimed in claim 4, characterized in that: A steering oil inlet pipe (9) is provided between the steering pump (5) and the oil port of the hydraulic oil tank (6); A lifting oil inlet pipe (10) is provided between the lifting pump (4) and the oil port of the hydraulic oil tank (6).

6. A PLC program-controlled hydraulic oil alarm device as claimed in claim 5, characterized in that: A steering oil return pipe (11) is provided between the steering system (2) and the oil port of the hydraulic oil tank (6); A lifting oil return pipe (12) is provided between the lifting system (3) and the oil port of the hydraulic oil tank (6).

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