Dry oil automatic lubricating system with reversing valve reversing fault warning device

Abstract

An automatic dry oil lubricating system with a reversing valve reversing fault warning device comprises an oil barrel, a pneumatic pump, a reversing valve, two pressure switches, an oil way distributor, an alarm device and a pipeline assembly, the pipeline assembly comprises a first oil supply pipe, a second oil supply pipe, an oil inlet pipe and an oil return pipe, the reversing valve is a three-position four-way electromagnetic valve, and the two pressure switches are arranged on the pneumatic pump. The first oil supply pipe is arranged on the port A, the second oil supply pipe is arranged on the port B, the oil inlet pipe is arranged on the port P, and the oil return pipe is arranged on the port T; the other end of the oil inlet pipe is installed on the pneumatic pump which extends into the oil barrel through a pipeline. The other end of the oil return pipe extends into the oil drum; the pressure switches are arranged on the first oil supply pipe and the second oil supply pipe. The automatic lubricating system disclosed by the utility model is more intelligent and safer, ensures normal operation of equipment, prevents larger loss during a fault, and increases the reliability of the equipment; the practicability is high, and the popularization significance is high.

Description

Technical Field

[0001] The utility model relates to a lubrication system, in particular to a dry oil automatic lubrication system with a reversing valve reversing fault warning device. Background Art

[0002] Today's paper and board machines are very large, sometimes up to 200 meters long; the paper web needs to pass through a large number of rollers, all of which are supported by rolling bearings. When the paper machine is working, it should work continuously and uninterruptedly as much as possible, and it can only be stopped during planned maintenance time; therefore, lubrication and maintenance of the bearings are also extremely important. If the bearings are not lubricated effectively, it will have a great impact on the operation of the roller bearings, and in severe cases, it will cause bearing damage.

[0003] Traditional roller bearing lubrication usually uses a separate lubricating oil pipeline to lubricate the bearing. To ensure that the oil is supplied to the entire pipeline, a pressure switch sensor is usually installed at the end of the pipeline. However, this traditional structure can only control a single set of oil supply pipelines, and its intelligence is low. In addition, on the mesh operation side, due to high humidity and high temperature, when the pressure sensor fails, there may be no feedback signal that the oil supply pressure has been reached, resulting in continuous pressurization in the pipeline, which will lead to excessive consumption of pipeline dry oil supply. Utility Model Content

[0004] Based on this, it is necessary to provide a dry oil automatic lubrication system with a reversing valve reversing fault warning device to address the deficiencies in the prior art.

[0005] A dry oil automatic lubrication system with a reversing valve reversing fault warning device, which includes an oil barrel, a pneumatic pump, a reversing valve, two pressure switches, an oil circuit distributor, an alarm device and a pipeline assembly, wherein the pipeline assembly includes a first oil supply pipe, a second oil supply pipe, an oil inlet pipe and an oil return pipe, the reversing valve is a three-position four-way solenoid valve, the first oil supply pipe is installed on the A port, the second oil supply pipe is installed on the B port, the oil inlet pipe is installed on the P port, and the oil return pipe is installed on the T port; wherein the other ends of the first oil supply pipe and the second oil supply pipe are both connected to the oil circuit distributor, the other end of the oil inlet pipe is installed on the pneumatic pump, and the pneumatic pump extends into the oil barrel through a pipeline; the other end of the oil return pipe extends into the oil barrel; the pressure switch is arranged on the farthest ends of the first oil supply pipe and the second oil supply pipe.

[0006] Furthermore, a pump valve is included, and the pump valve is connected to the pneumatic pump to control the start and stop switch of the pneumatic pump.

[0007] Furthermore, the two pressure switches are connected to the reversing valve signals. When both pressure switches are not satisfied, the reversing valve switches to the right position, the pump valve starts, and the pneumatic pump starts, so that the pressure switch of the first oil supply pipe is satisfied first, and then the reversing valve automatically switches to the left position, so that the pressure switch of the second oil supply pipe is also satisfied, and the reversing valve automatically returns to the middle position to release pressure. When in the middle position, the pump valve is automatically closed, and the pneumatic pump stops pressurizing.

[0008] Furthermore, it also includes a timing device, and the timing device signal is connected to the reversing valve.

[0009] Furthermore, it also includes a control device, and the control device signal is connected to the alarm device, the pressure switch, and the reversing valve.

[0010] Furthermore, an A end and a B end are respectively provided on both sides of the reversing valve, and both the A end and the B end are provided with a coil.

[0011] Furthermore, the pressure switch is arranged close to the end of the oil distributor farthest from the reversing valve.

[0012] To sum up, the automatic lubrication system of the utility model can not only realize automatic lubrication control of two pipelines, but also monitor the farthest pressurization point during the lubrication process and issue an alarm in real time; it is more intelligent and safe, ensures the normal operation of the equipment, prevents large losses in case of failure, and increases the reliability of the equipment; the utility model is highly practical and has strong promotion significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of a dry oil automatic lubrication system with a reversing valve reversing fault warning device of the utility model;

[0014] Figure 2 for Figure 1 Schematic diagram of the partially enlarged structure of the lubrication system. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0016] like Figure 1 and Figure 2As shown, it is a dry oil automatic lubrication system with a reversing valve 10 reversing fault warning device provided by the utility model, which is used to automatically lubricate the guide rails and roller bearings of the network pressure part. The dry oil automatic lubrication system with a reversing valve reversing fault warning device comprises a control device and an oil barrel 30 connected to the control device, a pneumatic pump 40, a reversing valve 10, two pressure switches 20, an alarm device, a pipeline assembly 60, and an oil circuit distributor 50. The pipeline assembly 60 is connected to the pneumatic pump 40 and the oil circuit distributor 50, and the reversing valve 10 and the pressure switch 20 are both connected to the pipeline assembly 60; the alarm device is connected to the pressure switch 20.

[0017] In this embodiment, the reversing valve 10 is a three-position four-way solenoid valve, and the reversing valve 10 is provided with port A, port B, port P and port T, wherein port A and port B are located on the same side, port P and port T are located on the same side, and port A and port P are arranged opposite to each other, and port B and port T are arranged opposite to each other. The reversing valve 10 includes a valve body and a valve core, and the valve core moves in the valve body; and has a middle position, a left position and a right position in the valve body. When the valve core is in the middle position, it is an H-type middle position, and all the oil ports on the valve body are connected. When the valve core is in the left position, port B is connected to port P, and port A is connected to port T; oil flows into port B, and oil returns to port A. When the valve core is in the right position, port A is connected to port P, and port B is connected to port T; oil flows into port A, and oil returns to port B. A coil is disposed at each end of the valve body; when the coil at the A end is energized, the reversing valve 10 automatically switches to the right position; when the coil at the B end is energized, the reversing valve 10 automatically switches to the left position.

[0018] The pipeline assembly 60 includes a first oil supply pipe 61, a second oil supply pipe 62, an oil inlet pipe 63 and an oil return pipe 64. The first oil supply pipe 21 is installed on the A port, the second oil supply pipe 62 is installed on the B port, the oil inlet pipe 63 is installed on the P port, and the oil return pipe 64 is installed on the T port. One end of the first oil supply pipe 61 and the second oil supply pipe 62 respectively extend to different oil circuit distributors 50 for oil supply. The other end is installed on the reversing valve 10. One end of the oil inlet pipe 63 and the oil return pipe 64 are both connected to the reversing valve 10. The other end of the oil inlet pipe 63 is installed on the pneumatic pump 40. The pneumatic pump 40 pumps the oil in the oil barrel 60 into the oil inlet pipe 63 for oil supply; the other end of the oil return pipe 64 extends into the oil barrel. The pressure switch 20 is installed at the farthest pressurization point position of the first oil supply pipe 61 and the second oil supply pipe 62.

[0019] The two pressure switches 20 are connected to the reversing valve 10 by signal. When both pressure switches 20 are not satisfied, the reversing valve 10 switches to the right position, the pump valve 41 starts, and the pneumatic pump 40 turns on, so that the pressure switch of the first oil supply pipe 61 is satisfied first, and then the reversing valve 10 automatically switches to the left position, so that the pressure switch of the second oil supply pipe 62 is also satisfied, and the reversing valve 10 automatically returns to the middle position to release pressure. When in the middle position, the pump valve 41 is automatically closed, and the pneumatic pump 40 stops pressurizing.

[0020] More specifically, the control device can perform timed lubrication on each mesh part and roller bearing at the time set on the on-site operation screen (about 30 minutes). When the timed lubrication time is reached, the pump valve 41 is opened. Previously, the reversing valve 10 is in the middle position, and the pressure at the ends of the first oil supply pipe 61 and the second oil supply pipe 62 is insufficient. According to the demand, the coil at the A end is energized, the reversing valve 10 automatically switches to the right position, the A port is connected to the P port, the lubricating oil enters the A port from the P port and exits, and the first oil supply pipe 61 begins to be pressurized. When the pressure switch 20 on the first oil supply pipe 61 detects that the pressure reaches the set value (the set pressure is set on the pressure switch, about 65 bar), the pressure switch 20 digital quantity feedback signal is sent to the control device. The control device receives the signal and controls the coil at the A end of the reversing valve to automatically lose power and the coil at the B end to be energized. The reversing valve 10 is switched to the left position, the B port is connected to the P port, the lubricating oil enters from the P port and exits from the B port, and the second oil supply pipe begins to be pressurized. When the pressure switch 20 on the second oil supply pipe detects that the pressure has been reached, the pressure switch 20 digitally feedbacks the signal to the control device, and the coil at the B end loses power. The reversing valve 10 is switched to the middle pressure relief position, and the pump valve solenoid valve 41 that controls the switch of the pneumatic pump 40 loses power, that is, the pump valve 41 is closed, and the oil supply pipe is no longer pressurized. At this time, wait for the set interval time to count, and repeat the above process after the timing ends.

[0021] When the control device still fails to receive the feedback information of the pressure switch 20 reaching the pressure within the set time, the control alarm device will send out an alarm message. For example: when pressurizing pipe A, it normally takes about 1 hour to reach the set pressure. If pipe A continues to be pressurized for more than 1.5 hours and still has not reached the set pressure, an alarm signal will be generated. The alarm device directly receives the alarm signal or the control device receives the information, and the alarm device sends out an alarm to warn the operator nearby on site that it is necessary to check the pressure switch 20 or check whether there is a leak in the oil circuit, which causes the pressure to fail to reach the set value.

[0022] To sum up, the automatic lubrication system of the utility model can not only realize automatic lubrication control of two pipelines, but also monitor the farthest pressurization point during the lubrication process and issue an alarm in real time; it is more intelligent and safe, ensures the normal operation of the equipment, prevents large losses in case of failure, and increases the reliability of the equipment; the utility model is highly practical and has strong promotion significance.

[0023] The above-mentioned embodiment only expresses one implementation method of the utility model, and its description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A dry oil automatic lubrication system with a reversing valve reversing fault warning device, characterized in that: It includes an oil barrel, a pneumatic pump, a reversing valve, two pressure switches, an oil circuit distributor, an alarm device and a pipeline assembly, wherein the pipeline assembly includes a first oil supply pipe, a second oil supply pipe, an oil inlet pipe and an oil return pipe, the reversing valve is a three-position four-way solenoid valve, the first oil supply pipe is installed on the A port, the second oil supply pipe is installed on the B port, the oil inlet pipe is installed on the P port, and the oil return pipe is installed on the T port; wherein the other ends of the first oil supply pipe and the second oil supply pipe are both connected to the oil circuit distributor, the other end of the oil inlet pipe is installed on the pneumatic pump, and the pneumatic pump extends into the oil barrel through a pipeline; the other end of the oil return pipe extends into the oil barrel; the pressure switch is arranged on the farthest ends of the first oil supply pipe and the second oil supply pipe.

2. A dry oil automatic lubrication system with a reversing valve reversing failure warning device as claimed in claim 1, characterized in that: The utility model also comprises a pump valve, wherein the pump valve is connected to the pneumatic pump to control the start and stop switch of the pneumatic pump.

3. A dry oil automatic lubrication system with a reversing valve reversing failure warning device as claimed in claim 1, characterized in that: It also includes a timing device, and the timing device signal is connected to the reversing valve.

4. A dry oil automatic lubrication system with a reversing valve reversing failure warning device as claimed in claim 1, characterized in that: It also includes a control device, and the control device is connected to the alarm device, the pressure switch, and the reversing valve by signal.

5. The dry oil automatic lubrication system with a reversing valve reversing failure warning device as claimed in claim 1, characterized in that: An A end and a B end are respectively arranged on both sides of the reversing valve, and both the A end and the B end are provided with coils.

6. A dry oil automatic lubrication system with a reversing valve reversing failure warning device as claimed in claim 1, characterized in that: The pressure switch is arranged close to a side of the oil distributor farthest from the reversing valve.

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