High-viscosity lubricating oil discharge recovery device

Abstract

The invention relates to a high-viscosity lubricating oil discharging and recycling device which comprises a pump station assembly, a pressure adjusting assembly, a return oil collecting assembly and a residual oil purging assembly. An oil outlet of the pump station assembly is connected with an oil inlet of the pressure adjusting assembly through a pipeline. An oil outlet of the pressure adjusting assembly is connected to an oil inlet of the bearing seat through a pipeline. An oil return opening of the bearing seat is connected with an oil inlet of the return oil collecting assembly through a pipeline. An oil outlet of the return oil collecting assembly is connected with an oil return opening of the pump station assembly through a pipeline. An emptying valve is arranged on a pipeline between the pressure adjusting assembly and the bearing seat; an isolating valve is arranged on the pipeline between the pressure adjusting assembly and the bearing seat; and an air outlet of the residual oil purging assembly is connected to a pipeline between the blowoff valve and the bearing seat through a pipeline. The high-viscosity lubricating oil discharge recovery device is ingenious in design, simple in structure, convenient to operate, reliable in performance and easy and convenient to install and maintain; the method has double attributes of saving resources and protecting the environment.

Description

Technical Field

[0001] The invention relates to a high-viscosity lubricating oil discharge and recovery device, belonging to the technical field of lubrication. Background Art

[0002] In the hot rolling equipment, the hot rolling unit is a 3 / 4 continuous rolling mill. Each frame contains upper and lower support rolls and upper and lower working rolls. The bearing seat of the support roll adopts Morgan oil film bearings. The oil film bearing of the rolling roll is a sliding bearing. The oil film bearing is mainly composed of six parts, including radial bearing parts, axial bearing parts, locking devices, sealing devices and other parts. Due to the heavy load characteristics of the bearing seat of the support roll in hot rolling production, the lubrication system needs to provide high-viscosity media (such as Shell 460# oil film oil) for forced lubrication. At the same time, due to the defects such as roll surface wear and deformation caused by the rolling production process, it is also necessary to regularly replace the support rolls in use, grind the roll surface and perform related equipment maintenance on the bearing seat. The main problems that are common in the process of changing the support rolls are: ⑴ The design of the lubrication system does not take into account the poor fluidity and difficulty of emptying and returning the oil of the high-viscosity lubricating oil during the roll change. The oil film oil has a slow return speed in the closed pipeline space and a long oil discharge time, which affects the efficiency of roll change. ⑵ The lubrication system design did not take into account the effective method and device for collecting and draining lubricating oil during roll change. The conventional backward operation method of disassembling the oil inlet hose and oil return hose on the bearing seat and directly discharging it to the ditch (direct discharge) has been used, resulting in the loss and waste of lubricating oil. ⑶ The direct discharge method inevitably causes equipment pollution and environmental pollution during the roll change process. ⑷ The water ingress phenomenon and trend of the support roll bearing seat during steel rolling production cannot be monitored online and relevant predictive maintenance measures cannot be taken.

[0003] The inventor found that the "A steam turbine lubricating oil circulation cleaning system" disclosed in the Chinese patent <CN205977285U> includes a lubricating oil tank, an oil pump pumps the cleaning lubricating oil in the tank into the oil tanks of each bearing seat of the steam turbine and the oil tanks of the generator and exciter bearing seats through different branches through the main pipeline, and each bearing seat oil tank is provided with an oil outlet, and the oil outlet returns the cleaning lubricating oil to the return port of the lubricating oil tank through the return oil pipe. The "roller lubricating oil mist collection and recycling device" disclosed in the Chinese patent <CN106678528A> includes a roller and an oil and gas generator and a roller bearing seat arranged at the end of the corresponding roller, and also includes an outlet oil and gas concentrator, a lubricating oil and gas separator, and an oil return filter. The lubricating oil and gas outlet on the roller bearing seat is connected to the inlet of the outlet oil and gas concentrator, the outlet of the outlet oil and gas concentrator is connected to the inlet of the lubricating oil and gas separator, the oil discharge port of the lubricating oil and gas separator is connected to the oil return filter through the oil return pipe, and the oil return filter is connected to the oil and gas generator. Although these patents have certain cleaning and recycling functions, they are essentially a circular connection between the oil return circuit and the oil supply circuit. Summary of the invention

[0004] The technical problem to be solved by the present invention is: to overcome the shortcomings of the above-mentioned technology and provide a multifunctional integrated oil discharge device suitable for high-viscosity lubricating oil with the features of guaranteed cleanliness, reliable connection, rapid discharge, efficient recovery, safety and environmental protection, and convenient operation.

[0005] In order to solve the above technical problems, the technical solution proposed by the present invention is: an oil discharge and recovery device for high-viscosity lubricating oil, comprising: a pump station component, a pressure regulating component, an oil return collection component and a residual oil purge component; the oil outlet of the pump station component is connected to the oil inlet of the pressure regulating component through a pipeline; the oil outlet of the pressure regulating component is connected to the oil inlet of the bearing seat through a pipeline; the oil return port of the bearing seat is connected to the oil inlet of the oil return collection component through a pipeline; the oil outlet of the oil return collection component is connected to the oil return port of the pump station component through a pipeline; the oil return collection component is lower than the bearing seat; the pressure regulating component The pipeline between the pressure regulating component and the bearing seat extends to a position higher than the bearing seat, and a drain valve is installed at this position; when the drain valve is opened, the pipeline between the pressure regulating component and the bearing seat is connected to the atmosphere; an isolation valve is installed on the pipeline between the pressure regulating component and the bearing seat; the air outlet of the residual oil purge component is connected to the pipeline between the drain valve and the bearing seat through a pipeline; the residual oil purge component can be connected to an air source; the return oil collection component includes an oil collecting tank and a water content detection alarm arranged in the oil collecting tank; the oil collecting tank is provided with a drain valve and a non-sealed movable box cover.

[0006] A further improvement of the above scheme is that an air filter is installed on the drain valve.

[0007] A further improvement of the above solution is that the drain valve is 500 mm or more higher than the upper working surface of the bearing seat.

[0008] The above solution is further improved in that: the oil collecting box is not a rectangular stainless steel box; the return oil collecting assembly is 1000 mm or more lower than the lower working surface of the bearing seat.

[0009] The high-viscosity lubricating oil discharge and recovery device provided by the present invention has an ingenious design, a simple structure, convenient operation, reliable performance, and simple installation and maintenance; it can be installed and adjusted in one go, meeting the reliability and safety requirements of equipment maintenance operations; it solves the technical problems of poor fluidity of high-viscosity lubricating oil in a closed pipeline and slow oil return and discharge speed, and can achieve the requirements for improving efficiency of rapid roll change; it solves the problems of waste of lubricating oil discharged when changing support rolls, inability to recycle it, and environmental pollution, and has the dual attributes of saving resources and protecting the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1It is a schematic structural diagram of a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0011] The high viscosity lubricating oil drain recovery device of this embodiment is as follows: Figure 1 As shown, it includes: a pump station component 1, a pressure regulating component 2, a return oil collection component 8 and a residual oil purge component 4.

[0012] The oil outlet of the pump station assembly 1 is connected to the oil inlet of the pressure regulating assembly 2 through a pipeline; the oil outlet of the pressure regulating assembly 2 is connected to the oil inlet of the bearing seat 3 through a pipeline; thus, an oil supply structure is formed. An isolation valve 7 is installed on the pipeline between the pressure regulating assembly 2 and the bearing seat 3; the pipeline between the pressure regulating assembly 2 and the bearing seat 3 extends to a position higher than the bearing seat 3, and a drain valve 17 is installed at this position; when the drain valve 17 is opened, the pipeline between the pressure regulating assembly 2 and the bearing seat 3 is connected to the atmosphere; an air filter 19 is installed on the drain valve 17; the drain valve 17 is pneumatically driven. The drain valve 17 is 500mm or more higher than the upper working surface of the bearing seat 3.

[0013] The oil return port of the bearing seat 3 is connected to the oil inlet of the oil return collection assembly 8 through a pipeline; the oil outlet of the oil return collection assembly 8 is connected to the oil return port of the pump station assembly 1 through a pipeline; thus, an oil return structure is formed. The oil return collection assembly 8 is lower than the bearing seat 3; the pump station assembly 1 is lower than the oil return collection assembly 8. Since the bearing seat 3 is usually divided into a transmission side bearing seat and an operating side bearing seat, the oil return collection assembly 8 is 1000mm or more lower than the lower working surface of the bearing seat 3 to ensure that the pipelines from all bearing seats 3 to the oil return collection assembly 8 can meet the inclination greater than or equal to 3%. Similarly, the inclination of the pipelines from the oil return collection assembly 8 to the pump station assembly 1 should also be greater than or equal to 3%. The air outlet of the residual oil purge assembly 4 is connected to the pipeline between the drain valve and the bearing seat 3 through a pipeline; the residual oil purge assembly 4 can be connected to the air source 25; after filtering the gas through the three pneumatic parts 23, the two-position two-way pneumatic reversing valve 21 connects the pipeline between the drain valve and the bearing seat 3. At the same time, the residual oil purge assembly 4 is also used to drive the drain valve 17, and the opening and closing of the drain valve 17 are controlled by the two-position five-way pneumatic reversing valve 22. At the same time, the isolation valve 7 is also pneumatically driven and is also controlled by the two-position five-way pneumatic reversing valve 22, and is linked to the drain valve 17. When the drain valve 17 is opened, the isolation valve 7 is closed.

[0014] The return oil collection assembly 8 includes an oil collection tank, a water content detection alarm 9 arranged in the oil collection tank; the oil collection tank is provided with a drain valve 10 and a non-sealed movable tank cover. The oil collection tank has a capacity of 500L and is a rectangular stainless steel welded structure. The tank body is fixed to the wall of the transmission side return oil pipe gallery. A bypass normally closed valve 11 is provided in the return oil path of the return oil collection assembly 8.

[0015] Other safety structures are similar to the existing lubricating oil structures, such as machine-side pressure gauge, flow switch, pressure sensor, temperature gauge, normally closed valve, pressure regulating valve, pressure gauge, stop valve, etc.

[0016] The working process of the high viscosity lubricating oil drain recovery device of this embodiment is as follows: 1. When the rolling mill stops, the oil system on the operating table stops.

[0017] 2. Mill flushing, cooling rolls and mill equipment.

[0018] 3. The equipment confirms the pressure and flow (sensor) conditions at the machine site.

[0019] 4. Production operation of hanging cover plate.

[0020] 5. The operator performs the oil drain recovery process and completes the pipeline and bearing box cleaning and purging process according to the sequence of the electrical control table.

[0021] Specifically: start the control button → connect the two-position two-way pneumatic reversing valve 21 → open the drain valve 17 → siphon the oil out of the bearing seat.

[0022] The operator presses the control button of the two-position two-way pneumatic reversing valve 21 on the operating table to connect the air source, open the drain valve 17, and close the isolation valve 7; at this time, a height difference of more than 2500mm is formed between the oil inlet of the bearing seat and the oil return port of the bearing seat, and from the opening of the air filter 19 to the oil collecting tank. The lubricating oil in the pipeline forms a huge siphon suction vacuum effect under the action of its own weight. Under this suction, all the lubricating oil deposited in the bearing seat box and pipeline within the height of 2500mm is quickly discharged into the oil collecting tank, completing the rapid discharge and recovery of lubricating oil in all oil return areas. The isolation valve 7 prevents the lubricating oil from flowing back from the oil supply structure. If the operator believes or finds that the residual oil in the pipeline is difficult to be discharged under the condition of dead weight, the pneumatic assistance is started; the operator first closes the two-position two-way pneumatic reversing valve 21 on the operating table, and the drain valve 17 is closed; the operator then opens the two-position five-way pneumatic reversing valve 22, connects the air source, and conducts a thorough pressurized purging and cleaning of the bearing seat housing and pipelines from the oil inlet of the bearing seat on the operating side and the transmission side to the oil return port of the support roller bearing seat, that is, at a height of 2500mm, and finally completes the process of purging the lubricating oil in the oil return area.

[0023] In this way, on the one hand, the high-speed and large-flow lubricating oil generated by the vacuum siphon effect can be recovered and collected through the oil collecting tank, avoiding or improving the phenomenon of "flow blockage" of high-viscosity lubricating oil in the oil pipe in the oil return area due to poor oil return. On the other hand, due to the harsh environmental conditions of the rolling mill support roller bearing seat, the bearing seat is prone to water ingress during production. The return oil collection tank independently designed in the return oil collection component 8 has a water accumulation alarm function. When the accumulated water reaches the upper limit height set by the oil collecting tank, the monitoring screen displays a yellow alarm message, reminding the equipment maintenance personnel to do a good job of discharging water and other related equipment maintenance to ensure the safe operation of the support roller bearing seat.

[0024] After the operation is completed, reset the corresponding valve.

[0025] 6. On-site maintenance personnel remove the oil return hose on the operating side and the transmission side, and remove the oil inlet hose on the operating side and the transmission side.

[0026] 7. Production operation of the upper and lower rollers.

[0027] 8. Install new support rollers.

[0028] 9. Complete the support roller replacement operation.

[0029] The present invention is not limited to the above embodiments. Any technical solution formed by equivalent replacement falls within the protection scope required by the present invention.

Claims

1. A high viscosity lubricating oil drain recovery device, characterized in that: include: A pump station assembly, a pressure regulating assembly, an oil return collection assembly and a residual oil purge assembly; the oil outlet of the pump station assembly is connected to the oil inlet of the pressure regulating assembly through a pipeline; the oil outlet of the pressure regulating assembly is connected to the oil inlet of the bearing seat through a pipeline; the oil return port of the bearing seat is connected to the oil inlet of the oil return collection assembly through a pipeline; the oil outlet of the oil return collection assembly is connected to the oil return port of the pump station assembly through a pipeline; the oil return collection assembly is lower than the bearing seat; the pipeline between the pressure regulating assembly and the bearing seat extends to a position higher than the bearing The position of the seat is arranged, and a drain valve is installed at the position; when the drain valve is opened, the pipeline between the pressure regulating assembly and the bearing seat is connected to the atmosphere; an isolation valve is installed on the pipeline between the pressure regulating assembly and the bearing seat; the air outlet of the residual oil purge assembly is connected to the pipeline between the drain valve and the bearing seat through a pipeline; the residual oil purge assembly can be connected to an air source; the return oil collection assembly includes an oil collecting tank and a water content detection alarm arranged in the oil collecting tank; the oil collecting tank is provided with a drain valve and a non-sealed movable box cover.

2. The high viscosity lubricating oil drain recovery device according to claim 1, characterized in that: An air filter is mounted on the drain valve.

3. The high viscosity lubricating oil drain recovery device according to claim 1, characterized in that: The drain valve is 500 mm or more higher than the upper working surface of the bearing seat.

4. The high viscosity lubricating oil drain recovery device according to claim 1, characterized in that: The oil collecting box is a rectangular stainless steel box; the return oil collecting assembly is 1000 mm or more lower than the lower working surface of the bearing seat.

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