Reverse lubricating oil eliminating device for return pipe of plate-and-frame oil filter

Abstract

The utility model belongs to the technical field of plate-frame oil filter return pipe equipment, and relates to a plate-frame oil filter return pipe backflow lubricating oil eliminating device which comprises an oil tank, the top of the oil tank is connected to an oil groove through an outlet pipe, an outlet valve is arranged on the outlet pipe, a pressing handle is arranged on the front side of the oil groove, and a front pressing plate is arranged at the rear end of the pressing handle. The bottom of the oil groove is connected to the bottom of the oil tank after passing through the gear oil pump through an oil pump inlet pipe, and an electromagnetic valve is arranged on the oil pump inlet pipe. The oil management of the lubricating oil station is safer, and the continuous and stable operation capability of equipment is enhanced.

Description

Technical Field

[0001] The utility model belongs to the technical field of return pipe equipment of a plate and frame oil filter, and in particular relates to a device for eliminating backflow lubricating oil in a return pipe of a plate and frame oil filter. Background Art

[0002] Plate and frame oil filter for lubricating oil station of rotating equipment in steel mill. Common rotating equipment in steel mills include piston, centrifugal and axial flow fans and compressors, which supply wind and industrial gas medium for production. Lubricating oil station is usually configured on site of rotating equipment to provide lubrication or power oil for the shaft system of rotating equipment. Therefore, oil management of lubricating oil station is very important, among which particle size is the key control index. In order to control the index, the method of regular oil filtering is usually adopted. Plate and frame oil filter is a commonly used oil filtering equipment, which can effectively filter impurities in lubricating oil.

[0003] The plate and frame oil filter is composed of filter bed, oil pump and coarse filter. Filter paper or filter cloth is used as filter medium between the filter plate and the filter frame. The filter plate and the filter frame are fixed to form a separate filter chamber by the pressure of the pressing device. The filter paper or filter cloth pressed between the filter plate and the filter frame plays a filtering role. The working principle of the plate and frame oil filter is to introduce the lubricating oil at the bottom of the oil station through the pressurization of the gear oil pump of the oil filter. Then, the pressurized lubricating oil leaves the oil station and enters the plate frame of the oil filter. After passing through the filter paper, the solid impurities remain on the filter paper. The clean lubricating oil returns to the top of the oil station.

[0004] The filter paper is installed between the filter plate and the filter frame, arranged layer by layer, and fixed by a clamping device. When the lubricating oil is pressurized by the gear oil pump and enters the filter paper, there is leakage of the lubricating oil. First, after the filter paper is soaked with oil, the lubricating oil will seep out of the filter paper to the outside of the filter frame. Secondly, the lubricating oil is pressurized by the gear oil pump, and in the process of passing through the filter paper layer by layer, the lubricating oil will seep out from the gaps pressed by the filter plate. The leaked lubricating oil is collected by the oil tank of the plate and frame oil filter, and flows back to the inlet of the gear pump through the return pipe at the bottom of the oil tank to continue filtering.

[0005] Problems in the prior art: When the oil filter is working, if there is an abnormal situation such as power failure or tripping, the gear oil pump stops working. At this time, the lubricating oil at the bottom of the oil tank still enters the plate and frame oil filter under the action of static pressure, and flows back into the oil tank through the return pipe. After a long time, the lubricating oil overflows the oil tank, the oil level of the oil station is reduced, and even the large rotating equipment is shut down due to oil shortage.

[0006] Therefore, a device for eliminating backflow of lubricating oil in a return pipe of a plate and frame oil filter is proposed. Utility Model Content

[0007] The utility model aims to provide a device for eliminating the backflow of lubricating oil in the return pipe of a plate and frame oil filter, which has the function of eliminating the backflow of lubricating oil in the return pipe of the plate and frame oil filter, and solves the problem that in the operation of the oil filter in the prior art, when a power outage or trip occurs, the lubricating oil at the bottom of the oil tank enters the plate and frame oil filter through the return pipe and flows back into the oil tank, causing the lubricating oil to overflow the oil tank, reduce the oil level of the oil station, and even cause large rotating equipment to stop due to oil shortage.

[0008] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is that the utility model provides a device for eliminating backflow of lubricating oil in the return pipe of a plate and frame oil filter, including an oil tank, the top of the oil tank is connected to the oil tank through an outlet pipe, the outlet pipe is provided with an outlet valve, a clamping handle is provided on the front side of the oil tank, a front pressure plate is provided at the rear end of the clamping handle, filter paper and filter plate are provided in the middle of the oil tank, the bottom of the oil tank is connected to the bottom of the oil tank through an oil pump inlet pipe and then passes through a gear oil pump, and a solenoid valve is provided on the oil pump inlet pipe.

[0009] Preferably, there are a plurality of filter papers and filter plates, and the filter papers and filter plates are arranged in a staggered manner.

[0010] Preferably, a thrust plate is provided at the rear side of the oil groove.

[0011] Preferably, a pressure gauge is also provided on the oil pump inlet pipe.

[0012] Preferably, the oil pump inlet pipe is connected to the oil tank through a reflux pipe, and a reflux valve and a check valve are provided on the reflux pipe.

[0013] Preferably, the solenoid valve is electrically connected to a power source.

[0014] Compared with the prior art, the advantages and positive effects of the utility model are:

[0015] 1. The utility model makes the oil management of lubricating oil stations safer and enhances the continuous and stable operation capability of equipment;

[0016] 2. The utility model has the function of eliminating the backflow of lubricating oil in the return pipe of the plate and frame oil filter, which solves the problem that when the oil filter in the prior art is working, the lubricating oil at the bottom of the oil tank enters the plate and frame oil filter through the return pipe and flows back into the oil tank when a power outage or trip occurs, causing the lubricating oil to overflow the oil tank, reduce the oil level of the oil station, and even cause large rotating equipment to stop due to oil shortage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor.

[0018] Figure 1 It is a structural schematic diagram of a device for eliminating backflow of lubricating oil in a return pipe of a plate and frame oil filter;

[0019] In the above figure, 1. clamping handle, 2. front pressure plate, 3. filter paper, 4. oil tank, 5. thrust plate, 6. filter plate, 7. gear oil pump, 8. oil pump inlet pipe, 9. outlet pipe, 10. oil tank, 11. reflux valve, 12. pressure gauge, 13. power supply, 14. check valve. DETAILED DESCRIPTION

[0020] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0021] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0022] Embodiment 1, as Figure 1 As shown, a device for eliminating backflow of lubricating oil in the return pipe of a plate and frame oil filter includes an oil tank 10. The oil tank 10 is used to store lubricating oil. As a storage container for lubricating oil, the oil tank 10 provides lubricating oil supply to ensure sufficient lubricating oil supply, large capacity, and stable structure. The top of the oil tank 10 is connected to the oil tank 4 through an outlet pipe 9. The oil tank 4 is used for collection and can temporarily accommodate and collect the filtered lubricating oil. It collects the filtered clean lubricating oil and the leaked lubricating oil, and serves as a temporary reservoir for lubricating oil to prevent the lubricating oil from overflowing. The outlet pipe 9 returns the lubricating oil stored in the oil tank 4 to the oil tank 10. An outlet valve is provided on the outlet pipe 9, and the opening and closing of the outlet pipe 9 is adjusted by the outlet valve.

[0023] A clamping handle 1 is provided at the front side of the oil tank 4. The clamping handle 1 is used by the operator to apply pressure. A front pressure plate 2 is provided at the rear end of the clamping handle 1. The front pressure plate 2 is pushed forward by the clamping handle 1 to apply pressure. Filter paper 3 and filter plate 6 are provided in the middle of the oil tank 4. The filter paper 3 is used as a filter medium to intercept solid impurities in the lubricating oil, improve the cleanliness of the lubricating oil, have a good filtering effect, and are easy to replace. The filter plate 6 is used in conjunction with the filter paper 3 to support the filter paper 3. It has a solid structure and good pressure resistance. When the filter paper 3 is full of lubricating oil, the front pressure plate 2 is pushed by the clamping handle 1 to apply pressure, and the lubricating oil in the filter paper 3 is squeezed out by the filter plate 6.

[0024] The bottom of the oil tank 4 is connected to the bottom of the oil tank 10 through the oil pump inlet pipe 8 and the gear oil pump 7. The lubricating oil inside the oil tank 4 is transported from the oil pump inlet pipe 8 to the inside of the oil tank 4 through the extraction action of the gear oil pump 7. A solenoid valve is provided on the oil pump inlet pipe 8. The solenoid valve is an electromagnetically driven stop valve. The gear oil pump 7 establishes an electrical interlock with the solenoid valve. When the same section power supply 13 is powered off, the gear oil pump 7 stops and the solenoid valve automatically closes.

[0025] The following is a detailed description of the design of the above key components:

[0026] The filter paper 3 and the filter plate 6 are arranged in a staggered manner. The filter paper 3 is installed between the filter plate 6 and the filter frame, arranged in layers, and fixed by a clamping device. The lubricating oil is pressurized by the gear oil pump 7 and enters the filter paper 3. After the filter paper 3 is soaked in oil, the lubricating oil will seep out of the filter paper 3. After the gear oil pump 7 pressurizes, the lubricating oil will seep out of the gaps pressed by the filter plate 6 during the process of passing through the filter paper 3 layer by layer. The seeped lubricating oil is collected by the oil tank 4.

[0027] A thrust plate 5 is provided at the rear side of the oil tank 4. The thrust plate 5 is used to support and fix the filter plate 6 and the filter paper 3, limit the maximum displacement distance of the filter plate 6 and the filter paper 3 during the filtration process, and provide additional support to facilitate pressurizing the filter plate 6 and the filter paper 3 to squeeze the oil, thereby avoiding damage to the inner wall of the rear side of the oil tank 4 due to pressurization.

[0028] The oil pump inlet pipe 8 is also provided with a pressure gauge 12. The pressure gauge 12 monitors the pressure in the pipe in real time and displays the pressure value in the oil pump inlet pipe 8, so that the operator can understand the status at any time. By monitoring the pressure change, system abnormalities can be discovered and prevented in time, which helps to avoid equipment failures and accidents caused by abnormal pressure.

[0029] The oil pump inlet pipe 8 is connected to the oil tank 4 through a return pipe. The return pipe is used for reflux. The lubricating oil in the oil tank 4 is sent to the oil pump inlet pipe 8 through the return pipe and then sent to the filter paper 3 for filtration. It can also collect a small amount of residual oil that has not been sent to the oil tank 10. A return valve 11 and a check valve 14 are provided on the return pipe. The check valve 14 establishes a mechanical anti-reverse channeling measure. The return valve 11 is a manual valve and is kept fully open when in use. The check valve 14 is installed on the vertical section of the return pipe. During normal operation, the accumulated oil in the oil tank 4 overcomes the resistance of the check valve 14 through the action of gravity and enters the gear oil pump 7. When an abnormal power outage occurs, the lubricating oil in the oil tank 10 stops flowing under the obstruction of the check valve 14 to avoid oil leakage. The return valve 11 and the check valve 14 work together to prevent the lubricating oil from flowing back when the gear oil pump 7 stops working.

[0030] The solenoid valve is electrically connected to a power supply 13. The power supply 13 of the solenoid valve and the gear oil pump 7 are powered by the same segment of electricity with different voltage levels but the same source, so that the gear oil pump 7 and the solenoid valve can be electrically interlocked. When the power supply 13 is powered off, the gear oil pump 7 stops and the solenoid valve is automatically closed.

[0031] The standard parts used in the utility model can all be purchased from the market, special-shaped parts can be customized according to the description in the specification and the drawings, the specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the prior art, the machinery, parts and equipment all adopt the conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The content not described in detail in this specification belongs to the prior art known to professional and technical personnel in this field.

[0032] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A device for eliminating backflow of lubricating oil in the return pipe of a plate and frame oil filter, characterized in that: It includes an oil tank, the top of which is connected to the oil tank through an outlet pipe, the outlet pipe is provided with an outlet valve, the front side of the oil tank is provided with a clamping handle, the rear end of the clamping handle is provided with a front pressure plate, the middle of the oil tank is provided with filter paper and a filter plate, the bottom of the oil tank is connected to the bottom of the oil tank through an oil pump inlet pipe passing through a gear oil pump, the oil pump inlet pipe is provided with a solenoid valve, the oil pump inlet pipe is connected to the oil tank through a reflux pipe, and the reflux pipe is provided with a reflux valve and a check valve.

2. The device for eliminating backflow of lubricating oil in the return pipe of a plate and frame oil filter according to claim 1, characterized in that: The filter papers and filter plates are in a certain quantity and are arranged in a staggered manner.

3. The device for eliminating backflow of lubricating oil in the return pipe of a plate and frame oil filter according to claim 1, characterized in that: A thrust plate is arranged at the rear side of the oil groove.

4. The device for eliminating backflow of lubricating oil in the return pipe of a plate and frame oil filter according to claim 1, characterized in that: A pressure gauge is also provided on the oil pump inlet pipe.

5. The device for eliminating backflow of lubricating oil in the return pipe of a plate and frame oil filter according to claim 1, characterized in that: The solenoid valve is electrically connected to a power source.

Images