Grease lubrication system based on PLC control

Abstract

The utility model belongs to the technical field of engineering machinery auxiliary equipment, and particularly relates to a grease lubricating system based on PLC control, which comprises a PLC, a lubricating device, an oil pressure switch and a low oil level switch, a signal input terminal of the PLC is respectively connected with the oil pressure switch and the low oil level switch, and a signal output terminal of the PLC is connected with the lubricating device; the oil pressure switch is installed at the tail end of the lubricating pipeline and used for collecting oil pressure signals of the tail end of the lubricating pipeline. The low-oil-level switch is installed on the outer side of the oil tank and used for collecting low-oil-level signals in the oil tank. According to the utility model, the intermediate relay for controlling the oil pump is connected to the output module of the PLC, and the oil pressure switch and the low oil level switch are connected to the input module of the PLC, so that the start or stop of the lubricating motor is automatically controlled, and the low oil level switch is used for detecting an oil level signal; when the oil level is low, an alarm is automatically given, and the oil pump does not work under the condition that the chain oil inlet pump is started to prevent faults.

Description

Technical Field

[0001] The utility model belongs to the technical field of engineering machinery auxiliary equipment, and in particular relates to a grease lubrication system based on PLC control. Background Art

[0002] The statements in this section merely provide background technical information related to the present invention and do not necessarily constitute prior art.

[0003] At present, there are some working conditions in the use of grease lubrication of automated equipment in production workshops, which require manual judgment based on the use of the equipment when lubrication is needed, and then manually control the lubricating oil pump for lubrication. If the worker forgets or makes inaccurate judgments, the equipment will not be lubricated in time, which will increase the friction and heat generated by the equipment, increase the loss of the equipment, and reduce the service life of the equipment; in severe cases, it will endanger the life of the operator.

[0004] At present, the industry usually displays the lubrication status by adding a programmable controller to the oil pump. The lubricating oil pump, pressure switch, and liquid level detection are connected to the programmable controller to realize automatic lubrication of grease. However, the programmable controller is expensive and complicated to debug, and requires manual regular inspection. Utility Model Content

[0005] In order to overcome the above-mentioned deficiencies of the prior art, the utility model provides a grease lubrication system based on PLC control.

[0006] To achieve the above objectives, one or more embodiments of the present invention provide the following technical solutions:

[0007] The first aspect of the utility model provides a grease lubrication system based on PLC control, comprising: a PLC controller, a lubrication device, an oil pressure switch and a low oil level switch;

[0008] The signal input terminal of the PLC controller is connected to the oil pressure switch and the low oil level switch respectively, and the signal output terminal of the PLC controller is connected to the lubrication device;

[0009] The oil pressure switch is installed at the end of the lubrication pipeline to collect the oil pressure signal at the end of the lubrication pipeline; the low oil level switch is installed outside the oil tank to collect the low oil level signal in the oil tank.

[0010] Furthermore, the low oil level switch is a magnetic switch, which is connected at low liquid level by attracting a suspension magnet arranged inside the oil tank; the suspension magnet changes with the oil level.

[0011] Furthermore, it also includes a start button and a stop button, which are respectively connected to the signal input terminals of the PLC controller; the start button and the stop button are respectively used to control the start and stop of the system.

[0012] Furthermore, the start button and the stop button are both illuminated buttons.

[0013] Furthermore, the lubrication device is an electric lubricating oil pump.

[0014] Furthermore, the electric lubricating oil pump includes a lubrication motor and a solenoid valve, and the signal output terminal of the PLC controller is respectively connected to the lubrication motor and the solenoid valve through an intermediate relay.

[0015] Furthermore, it also includes a timing module, which is connected to the signal input terminal of the PLC controller. The timing module is used to send a time signal to the PLC controller at a regular time. The PLC controller is used to control the start and stop of the lubricating oil pump according to the time signal sent by the timing module.

[0016] Furthermore, it also includes an input module, and the input module is a touch screen.

[0017] Furthermore, it also includes an alarm module, which is connected to the signal output terminal of the PLC controller and is used to send out an alarm signal.

[0018] Furthermore, the alarm module includes a buzzer and a signal indicator light.

[0019] One or more of the above technical solutions have the following beneficial effects:

[0020] The utility model connects an intermediate relay for oil pump control to an output module of a PLC, and connects an oil pressure switch and a low oil level switch to an input module of the PLC, thereby realizing automatic control of starting or shutting down a lubrication motor, and utilizes the low oil level switch to detect an oil level signal, automatically alarms when the oil level is low, and prevents the oil pump from working when the oil pump is turned on to prevent malfunctions.

[0021] Advantages of additional aspects of the present invention will be partially given in the following description, and partially become apparent from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0023] Figure 1This is a schematic diagram of a grease lubrication system based on PLC control in Example 1.

[0024] Figure 2 This is the lubrication circuit of Example 1.

[0025] Figure 3 This is a connection diagram of the signal input terminal of the PLC controller of Example 1.

[0026] Figure 4 This is a connection diagram of the signal output terminal of the PLC controller of Example 1. DETAILED DESCRIPTION

[0027] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0028] Embodiment 1

[0029] like Figure 1 As shown, the utility model proposes a grease lubrication system based on PLC control, including: a PLC controller, a lubrication device, an oil pressure switch and a low oil level switch;

[0030] The signal input terminal of the PLC controller is connected to the oil pressure switch and the low oil level switch respectively, and the signal output terminal of the PLC controller is connected to the lubrication device;

[0031] The oil pressure switch is installed at the end of the lubrication pipeline to collect the oil pressure signal at the end of the lubrication pipeline. When the pressure is reached at the end, it means that lubrication is completed; the low oil level switch is installed on the outside of the oil tank to collect the low oil level signal in the oil tank.

[0032] Among them, the low oil level switch is a magnetic switch, which realizes low liquid level connection by attracting the suspended magnet set inside the oil tank. The suspended magnet will change with the oil level. When the suspended magnet reaches the bottom of the oil tank, the magnetic switch is turned on to realize the collection of low oil level data.

[0033] The utility model connects the oil pressure switch and the low oil level switch to the input module of the PLC and the lubrication device to the output terminal of the PLC, thereby realizing automatic control of starting or shutting down the lubrication device; and utilizes the low oil level switch to detect the low oil level signal, thereby realizing automatic alarm when the oil level is low, and interlocking the lubrication device to prevent the oil pump from working and avoid malfunction when the lubrication device is turned on.

[0034] As a further technical solution, Figure 2 As shown, the lubrication device is an electric lubricating oil pump, which includes a lubricating motor and a solenoid valve. The signal output terminals of the PLC controller are respectively connected to the lubricating motor and the solenoid valve through an intermediate relay KA11.

[0035] In the utility model, the intermediate relay for oil pump control is connected to the output module of the PLC, so that the automatic start and stop of the lubrication device are realized.

[0036] As a further technical solution, Figure 3 As shown, it also includes a start button and a stop button, which are respectively connected to the signal input terminals of the PLC controller; the start button and the stop button are respectively used to manually control the start and stop of the system.

[0037] The start button and the stop button in the utility model are both lighted buttons. When the buttons are turned on, the corresponding indicator lights light up to display the operating status. For easy distinction, the indicator lights of the start button and the stop button are green and red, respectively.

[0038] It should be noted that the model of the PLC controller in this embodiment is S7-1200 CPU1214C. The PLC controller generates an output signal only when receiving a corresponding signal, and does not involve improvements to the software program.

[0039] As a further technical solution, it also includes a timing module, which is connected to the signal input terminal of the PLC controller. The timing module is used to send a time signal to the PLC controller at a regular interval. The PLC controller is used to control the start and stop of the lubricating oil pump according to the time signal sent by the timing module.

[0040] The utility model can set the timing start time and shutdown time through the timing module. Through the timing module, the system can automatically start the lubricating oil pump according to the set time and automatically stop lubrication according to the set shutdown time when no one is on duty.

[0041] Furthermore, it also includes an input module connected to the signal input terminal of the PLC controller, and the input module is a touch screen, through which the target pressure value required for lubrication and the time when the lubrication needs to be automatically turned on and off when unattended are set. By setting a password on the touch screen, only relevant maintenance technicians can set the input.

[0042] Furthermore, it also includes an alarm module connected to the signal output terminal of the PLC controller, and the alarm module is a buzzer H2 and a signal light H1.

[0043] When the low oil level switch detects a low liquid level signal in the lubricating oil barrel, the controller activates the alarm module to give an alarm prompt, reminding the maintenance personnel to add liquid to the lubricating oil barrel.

[0044] The working principle of the utility model is:

[0045] The timing module of the PLC is used to start the lubrication motor for lubrication when the time is up, and the oil pump is stopped by the pressure switch at the end. When the oil level is low, an alarm is automatically given and the oil pump is not allowed to work when the oil pump is turned on to prevent malfunctions.

[0046] The low oil level switch is used to monitor the oil level signal of the oil pump. When the oil pump is higher than the low oil level, the low oil level switch is turned on, indicating that the oil pump has oil; when the lubrication time set according to the equipment situation is reached, the timer is turned on.

[0047] After receiving the low oil level switch signal and the timing start signal, the PLC controller controls the intermediate relay of the lubrication pump to turn on, so that the oil pump works. When the set lubrication time is reached, the timing time relay inside the PLC used in the program is turned on and lubrication starts. When the entire equipment is lubricated, the oil pressure switch will be turned on. When the above conditions are met, it means that the lubrication is complete, the lubrication pump is disconnected, and the lubrication is over.

[0048] Although the above describes the specific implementation methods of the utility model in combination with the accompanying drawings, it is not intended to limit the scope of protection of the utility model. Technical personnel in the relevant field should understand that on the basis of the technical solution of the utility model, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the scope of protection of the utility model.

Claims

1. A grease lubrication system based on PLC control, characterized in that: include: PLC controller, lubrication device, oil pressure switch and low oil level switch; The signal input terminal of the PLC controller is connected to the oil pressure switch and the low oil level switch respectively, and the signal output terminal of the PLC controller is connected to the lubrication device; The oil pressure switch is installed at the end of the lubrication pipeline to collect the oil pressure signal at the end of the lubrication pipeline; the low oil level switch is installed outside the oil tank to collect the low oil level signal in the oil tank.

2. A grease lubrication system based on PLC control according to claim 1, characterized in that: The low oil level switch is a magnetic switch, which is connected to the low liquid level by attracting the suspension magnet arranged inside the oil tank; the suspension magnet changes with the oil level.

3. A grease lubrication system based on PLC control according to claim 1, characterized in that: It also includes a start button and a stop button, which are respectively connected to the signal input terminals of the PLC controller; the start button and the stop button are respectively used to control the start and stop of the system.

4. A grease lubrication system based on PLC control according to claim 3, characterized in that: The start button and the stop button are both illuminated buttons.

5. A grease lubrication system based on PLC control according to claim 1, characterized in that: The lubricating device is an electric lubricating oil pump.

6. A grease lubrication system based on PLC control according to claim 5, characterized in that: The electric lubricating oil pump comprises a lubricating motor and a solenoid valve, and the signal output terminals of the PLC controller are respectively connected to the lubricating motor and the solenoid valve through an intermediate relay.

7. A grease lubrication system based on PLC control according to claim 1, characterized in that: It also includes a timing module, which is connected to the signal input terminal of the PLC controller. The timing module is used to send a time signal to the PLC controller at a regular time. The PLC controller is used to control the start and stop of the lubricating oil pump according to the time signal sent by the timing module.

8. A grease lubrication system based on PLC control according to claim 1, characterized in that: It also includes an input module, which is a touch screen.

9. A grease lubrication system based on PLC control according to claim 1, characterized in that: It also includes an alarm module, which is connected to the signal output terminal of the PLC controller and is used to send out an alarm signal.

10. A grease lubrication system based on PLC control according to claim 9, characterized in that: The alarm module includes a buzzer and a signal indicator light.

Images