Lubricating oil filter pressure difference annunciator

Abstract

The utility model provides a differential pressure annunciator for a lubricating oil filter, which is used for solving the problem that the pressure drop of the filtered lubricating oil cannot be quickly known. The annunciator comprises a connecting pipe, a filter plate is arranged in the connecting pipe, a high-pressure pipe is arranged on one side of the filter plate, a low-pressure pipe is arranged on the other side of the filter plate, the high-pressure pipe is communicated with a high-pressure liquid guide pipe, the low-pressure pipe is communicated with a low-pressure liquid guide pipe, a shell is communicated between the high-pressure liquid guide pipe and the low-pressure liquid guide pipe, a spacer ring is arranged in the shell, and a guide rod slides in the spacer ring. A high-pressure magnetic plate is arranged on the side, arranged on the high-pressure liquid guide pipe, of the guide rod, a low-pressure magnetic plate is arranged on the side, arranged on the low-pressure liquid guide pipe, of the guide rod, a square bin is connected to the side wall of the shell in a sealed mode through a long hole, a reed switch is fixed in the square bin and electrically connected with a warning device, and the portion, between the low-pressure magnetic plate and the partition plate, of the guide rod is sleeved with a tension spring. According to the utility model, through the interaction of the high-voltage magnetic plate and the low-voltage magnetic plate with the reed switch, the warning device can be triggered immediately when the filter plate is blocked or the efficiency is reduced and the pressure difference is increased.

Description

Technical Field

[0001] The utility model relates to the field of differential pressure signal devices, in particular to a differential pressure signal device for a lubricating oil filter. Background Art

[0002] In complex industrial systems, transmission machinery must be lubricated by an oil system. During the circulation of the oil, metal debris generated by the friction of metal parts will be brought into the circulation system. Traditional oil circulation systems filter out metal debris by installing filter plates in the pipeline. When the filter plates are clogged, resulting in a decrease in the pressure of the filtered oil, the staff cannot quickly detect the problem, which delays maintenance and increases the risk of equipment damage. Utility Model Content

[0003] The utility model provides a lubricating oil filter pressure difference signal device, which solves the problem in the prior art that it is impossible to quickly know the drop in lubricating oil pressure after filtration.

[0004] The technical solution of the utility model is achieved in this way:

[0005] A lubricating oil filter pressure difference signal device comprises a connecting pipe, a filter plate is arranged in the connecting pipe, one side of the filter plate is a high-pressure pipe, and the other side is a low-pressure pipe, the high-pressure pipe is connected to a high-pressure liquid guiding pipe, and the low-pressure pipe is connected to a low-pressure liquid guiding pipe, and a shell is connected between the high-pressure liquid guiding pipe and the low-pressure liquid guiding pipe, a spacer ring is arranged in the shell, a guide rod is slid in the spacer ring, a high-pressure magnetic plate is arranged on one side of the guide rod placed on the high-pressure liquid guiding pipe, and a low-pressure magnetic plate is arranged on one side of the guide rod placed on the low-pressure liquid guiding pipe, the high-pressure magnetic plate and the low-pressure magnetic plate are both placed between the high-pressure liquid guiding pipe and the low-pressure liquid guiding pipe, a side wall of the shell is sealed and connected to a square bin through a long hole, a reed switch is fixed in the square bin, the reed switch is electrically connected to a warning device, two ends of the reed switch are respectively placed in the high-pressure bin and the low-pressure bin, a tension spring is sleeved on the guide rod between the low-pressure magnetic plate and the spacer, and when the high-pressure magnetic plate moves a certain distance toward the spacer ring, the high-pressure magnetic plate and the low-pressure magnetic plate cause the reed switch to close.

[0006] Furthermore, the shell is cylindrical in shape as a whole, the high-pressure liquid guide tube and the low-pressure liquid guide tube are both connected to the side wall of the shell, and the two ends of the shell are screwed with closing bolts, which are sealed with the shell through a sealing ring. Through the closing bolts, when maintenance or cleaning is required, the shell can be easily opened to inspect and clean the internal structure.

[0007] Furthermore, the tops of the high-pressure chamber and the low-pressure chamber are both connected to an exhaust pipe, and two retaining rings are arranged inside the exhaust pipe along the axis of the exhaust pipe, and a buoyancy ball is arranged to slide between the retaining rings, and the buoyancy ball can close the retaining ring, and there is a gap between the buoyancy ball and the exhaust pipe. Through the design of the buoyancy ball, the exhaust and closing process can be completed automatically without manual intervention, which greatly simplifies the operation process and improves work efficiency.

[0008] Furthermore, a strong magnetic filter plate is provided in the high-pressure pipe. After long-term use, the traditional filter plate will gradually lose its filtering effect due to the accumulation of metal debris, and may even be damaged due to clogging. The strong magnetic filter plate significantly reduces the damage of debris to the filter plate itself, thereby extending the service life of the entire filtration system, not only reducing maintenance costs, but also improving the stability and reliability of the system.

[0009] Furthermore, the connecting pipe is provided with a through slot, the strong magnetic filter plate is fixedly connected via a connecting ring, the filter ring closes the through slot via a sealing plate, a handle is provided on the sealing plate, and the sealing plate is sealed and connected to the connecting pipe via a buckle. The box structure formed by the connecting ring, the strong magnetic filter plate and the filter plate can effectively prevent metal debris from falling into the connecting pipe during the removal process, thereby avoiding ineffective filtering and additional cleaning work caused by scattered debris. This design not only improves the cleaning efficiency, but also ensures the continuous filtering effect of the system.

[0010] Furthermore, the inner side wall of the housing is provided with a guide key, and the side walls of the high-voltage magnetic plate and the low-voltage magnetic plate are provided with a guide groove that cooperates with the guide key. The stable installation of the magnetic plate helps to maintain the normal operation of the system, reduce system failures caused by the displacement or rotation of the magnetic plate, and enhance the overall stability of the system.

[0011] The beneficial effects that this technical solution can produce.

[0012] The utility model can trigger the warning device immediately when the filter plate is clogged or the efficiency is reduced, resulting in an increase in the pressure difference, through the interaction between the high-pressure magnetic plate and the low-pressure magnetic plate and the reed switch, so that the maintenance personnel can respond quickly and perform necessary cleaning or replacement work on the pipeline and filter screen, thereby avoiding the risk of more serious equipment failure or shutdown caused by long-term failure to detect the filter plate problem, and improving the safety and reliability of the system. The structure of the high-pressure magnetic plate and the low-pressure magnetic plate that slide with the reed switch is relatively simple, and the reed switch set in the square warehouse can be easily disassembled and replaced, which is convenient for maintenance and ensures the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0015] Figure 2 It is a schematic diagram of the cross-sectional three-dimensional structure of the utility model;

[0016] Figure 3 It is a schematic diagram of the explosion of the square compartment of the shell of the utility model;

[0017] Figure 4 This is a schematic diagram of the explosion at the strong magnetic filter plate of the connecting pipe of the utility model;

[0018] Figure 5 for Figure 2 A local enlarged schematic diagram of the middle A;

[0019] Figure 6 for Figure 2 A local enlarged schematic diagram of point B in the middle.

[0020] Wherein: 1. connecting pipe, 2. filter plate, 3. high-pressure pipe, 4. low-pressure pipe, 5. high-pressure liquid guide pipe, 6. low-pressure liquid guide pipe, 7. shell, 8. spacer ring, 9. guide rod, 10. high-pressure magnetic plate, 11. low-pressure magnetic plate, 12. square bin, 13. reed switch, 14. tension spring, 15. closing bolt, 16. exhaust pipe, 17. retaining ring, 18. buoyancy ball, 19. strong magnetic filter plate, 20. through groove, 21. connecting ring, 22. sealing plate, 23. buckle, 24. guide key. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] like Figure 1-3As shown in Figure 5, the embodiment of the utility model provides a lubricating oil filter pressure difference signal device, including a connecting pipe 1, a filter plate 2 is arranged in the connecting pipe 1, one side of the filter plate 2 is a high-pressure pipe 3, and the other side is a low-pressure pipe 4, the high-pressure pipe 3 is connected with a high-pressure liquid guide pipe 5, the low-pressure pipe 4 is connected with a low-pressure liquid guide pipe 6, the high-pressure liquid guide pipe 5 and the low-pressure liquid guide pipe 6 are connected with a shell 7, a spacer ring 8 is arranged in the shell 7, a guide rod 9 is slidable in the spacer ring 8, the guide rod 9 is placed on one side of the high-pressure liquid guide pipe 5, a high-pressure magnetic plate 10 is arranged, and the guide rod 9 is placed on one side of the low-pressure liquid guide pipe 6. A low-voltage magnetic plate 11 is provided on the side, and the high-voltage magnetic plate 10 and the low-voltage magnetic plate 11 are both placed between the high-voltage liquid guide tube 5 and the low-voltage liquid guide tube 6. The side wall of the shell 7 is sealed and connected to a square bin 12 through a long hole. A reed switch 13 is fixed in the square bin 12. The reed switch 13 is electrically connected to a warning device. The two ends of the reed switch 13 are respectively placed in the high-voltage bin and the low-voltage bin. A tension spring 14 is sleeved on the guide rod 9 between the low-voltage magnetic plate 11 and the partition. When the high-voltage magnetic plate 10 moves a certain distance toward the partition ring 8, the high-voltage magnetic plate 10 and the low-voltage magnetic plate 11 close the reed switch 13. The magnetic poles of the high-voltage magnetic plate 10 and the low-voltage magnetic plate 11 near the end of the reed switch 13 are opposite. The high-voltage magnetic plate 10 and the low-voltage magnetic plate 11 can both be made of existing strong magnetic materials such as magnetic steel, and the reed switch 13 and the warning device are all existing technologies. The square bin 12 is made of a material that does not isolate the magnetic field.

[0023] During use, both ends of the connecting pipe 1 are connected to the oil pipe, the end close to the lubricating oil source is the high-pressure end, and the high-pressure end is connected to the high-pressure pipe 3. A part of the lubricating oil enters between the shell 7 and the high-pressure magnetic plate 10 along the high-pressure liquid guide pipe 5, and the other part of the lubricating oil enters the low-pressure pipe 4 after being filtered by the filter plate 2. A part of the lubricating oil entering the low-pressure pipe 4 enters between the shell 7 and the low-pressure magnetic plate 11 along the low-pressure liquid guide pipe 6. The lubricating oil at the end of the high-pressure magnetic plate 10 applies pressure to the high-pressure magnetic plate 10, so that the high-pressure magnetic plate 10 moves toward the direction close to the spacer ring 8, and the high-pressure magnetic plate 10 passes through the guide rod 9. Overcoming the pressure of the lubricating oil at the end of the low-voltage magnetic plate 11 and the tension of the tension spring 14, the low-voltage magnetic plate 11 moves away from the spacer ring 8. In the normal state of the reed switch 13, the low-voltage magnetic plate 11 is placed at the closing point of the reed switch 13. At this time, the magnetic poles of the reed switch 13 are the same and cannot be closed. When the high-voltage magnetic plate 10 moves a certain distance toward the spacer ring 8, the high-voltage magnetic plate 10 and the low-voltage magnetic are respectively located at the two ends of the reed switch 13. At this time, the magnetic poles of the reed switch 13 are opposite and can be closed. After the reed switch 13 is closed, the circuit of the warning device is turned on, warning the staff to replace or maintain the filter plate 2. After cleaning or maintaining the filter plate 2, the pressure at both ends of the high-voltage magnetic plate 10 and the low-voltage magnetic plate 11 tends to be the same. At this time, the high-voltage magnetic plate 10 moves away from the spacer ring 8, and at the same time, the high-voltage magnetic plate 10 drives the low-voltage magnetic plate 11 to restore the tension spring 14. After the tension spring 14 is restored, the excessive movement of the high-voltage magnetic plate 10 can be limited. Timely warnings can ensure that the filter plate 2 is replaced or maintained before being blocked or damaged, thereby avoiding equipment damage due to lubricating oil contamination, extending the service life of the entire system, and not generating additional energy consumption due to lubricating oil contamination, thereby reducing the energy consumption of the entire system.

[0024] like Figure 2 , 3 As shown, the shell 7 is cylindrical as a whole, the high-pressure liquid guide tube 5 and the low-pressure liquid guide tube 6 are both connected to the side wall of the shell 7, and the two ends of the shell 7 are screwed with closing bolts 15, which are sealed and connected to the shell 7 through sealing rings. Since the lubricating oil has a certain viscosity and is not easy to flow, it will not be easy to return to the pipeline for circulation after the lubricating oil fills the high-pressure liquid guide tube 5, the low-pressure liquid guide tube 6 and the shell 7. When the lubricating oil cannot participate in the circulation operation for a long time, through the design of the closing bolts 15, the shell 7 can be easily opened to discharge the lubricating oil, ensuring that the lubricating oil can circulate normally and maintain the normal operation of the system. The sealing of the shell 7 can be improved by the sealing ring, which improves the sealing of the shell 7, prevents the leakage of lubricating oil, and ensures the stability and reliability of the system. It can also be convenient to assemble and disassemble the various components inside the shell 7, reducing the maintenance cost and difficulty.

[0025] like Figure 2 , 6As shown, the tops of the high-pressure chamber and the low-pressure chamber are both connected to an exhaust pipe 16, and two retaining rings 17 are provided inside the exhaust pipe 16 along the axis of the exhaust pipe 16, and a buoyancy ball 18 is provided between the retaining rings 17 to slide, and the buoyancy ball 18 can close the retaining ring 17, and there is a gap between the buoyancy ball 18 and the exhaust pipe 16. When the lubricating oil enters the shell 7, the air in the high-pressure chamber, the low-pressure chamber, the high-pressure liquid guide pipe 5 and the low-pressure liquid guide pipe 6 will push the buoyancy ball 18 to open the exhaust pipe 16, and be discharged from the exhaust pipe 16 port, preventing air from entering the lubricating oil circulation system and reducing the impact of air on the lubricating oil system. When the lubricating oil gradually enters the exhaust pipe 16, the buoyancy ball 18 applies buoyancy, and the buoyancy ball 18 rises and closes the retaining ring 17 at the upper end, so that the lubricating oil cannot be discharged, which can effectively prevent the leakage of the lubricating oil and ensure the sealing and stability of the system.

[0026] like Figure 2 , 4 As shown, a strong magnetic filter plate 19 is provided in the high pressure pipe 3. After the lubricating oil is circulated, many metal debris will be mixed in it, and the metal debris will gradually block the filter plate 2. By providing the strong magnetic filter plate 19, the lubricating oil can be initially filtered and adsorbed, and the filtered metal debris can be adsorbed to the side close to the filter plate 2, that is, the service life of the filter plate 2 is increased, and the flow of the lubricating oil is not hindered.

[0027] like Figure 4 As shown, the connecting pipe 1 is provided with a through slot 20, the strong magnetic filter plate 19 is fixedly connected via a connecting ring 21, the filter ring closes the through slot 20 via a sealing plate 22, a handle is provided on the sealing plate 22, and the sealing plate 22 is sealed and connected to the connecting pipe 1 via a buckle 23. The strong magnetic filter plate 19 can be snap-fitted with the connecting ring 21, and the buckle 23 and the snap-fitting method are not limited, and any method that can achieve a fixing effect is acceptable. In order to facilitate the cleaning and maintenance of the strong magnetic filter plate 19 and the filter plate 2, when the pressure difference at both ends of the filter plate 2 is detected to be too large, the buckles 23 at both ends of the sealing plate 22 that are connected to the connecting pipe 1 are opened, and the strong magnetic filter plate 19, the connecting ring 21 and the connecting plate are driven by the handle and the sealing plate 22 to be taken out from the through groove 20. The box structure formed by the connecting ring 21, the strong magnetic filter plate 19 and the filter plate 2 can prevent metal debris from falling into the connecting pipe 1 to prevent ineffective filtration. The strong magnetic filter plate 19 is disconnected from the connecting ring 21, and the metal debris on the strong magnetic filter plate 19 can be removed by a scraper to achieve the effect of metal debris recovery, thereby realizing the recycling of resources and reducing environmental pollution. The buckle 23 and the clamping method simplify the installation and disassembly process of the strong magnetic filter plate 19, without the need for complex tools or techniques, and improving work efficiency.

[0028] like Figure 2 , 5As shown, the inner wall of the housing 7 is provided with a guide key 24, and the side walls of the high-voltage magnetic plate 10 and the low-voltage magnetic plate 11 are provided with a guide groove that cooperates with the guide key 24. Through the design of the guide groove, the high-voltage magnetic plate 10 and the low-voltage magnetic plate 11 can be effectively prevented from rotating during the movement, ensuring the stable alignment of the magnetic poles, and avoiding the reed switch 13 from being unable to close normally due to the rotation of the magnetic poles, thereby improving the accuracy and reliability of the warning device and reducing the situation of missed reports. The precise cooperation of the guide groove and the guide key 24 provides clear guidance for the installation of the high-voltage magnetic plate 10 and the low-voltage magnetic plate 11, greatly reducing the errors and uncertainties in the installation process, not only making the installation process smoother and more efficient, but also ensuring the accuracy of the magnetic plate installation, avoiding performance problems caused by improper installation.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A lubricating oil filter pressure differential signal device, comprising a connecting pipe (1), characterized in that: A filter plate (2) is provided in the connecting pipe (1), one side of the filter plate (2) is a high-pressure pipe (3), and the other side is a low-pressure pipe (4), the high-pressure pipe (3) is connected to a high-pressure liquid guide pipe (5), the low-pressure pipe (4) is connected to a low-pressure liquid guide pipe (6), a housing (7) is connected between the high-pressure liquid guide pipe (5) and the low-pressure liquid guide pipe (6), a spacer ring (8) is provided in the housing (7), a guide rod (9) slides in the spacer ring (8), a high-pressure magnetic plate (10) is provided on one side of the guide rod (9) placed on the high-pressure liquid guide pipe (5), a low-pressure magnetic plate (11) is provided on one side of the guide rod (9) placed on the low-pressure liquid guide pipe (6), and a high-pressure magnetic plate (12) is provided on the other side of the guide rod (9). The plate (10) and the low-pressure magnetic plate (11) are both placed between the high-pressure liquid guide tube (5) and the low-pressure liquid guide tube (6). The side wall of the shell (7) is sealed and connected to a square bin (12) through a long hole. A reed switch (13) is fixed in the square bin (12). The reed switch (13) is electrically connected to a warning device. The two ends of the reed switch (13) are respectively placed in the high-pressure bin and the low-pressure bin. A tension spring (14) is sleeved on the guide rod (9) between the low-pressure magnetic plate (11) and the partition. When the high-pressure magnetic plate (10) moves a certain distance toward the partition ring (8), the high-pressure magnetic plate (10) and the low-pressure magnetic plate (11) close the reed switch (13).

2. The lubricating oil filter pressure differential signal device according to claim 1, characterized in that: The shell (7) is cylindrical in shape as a whole. The high-pressure liquid guide tube (5) and the low-pressure liquid guide tube (6) are both connected to the side wall of the shell (7). Closing bolts (15) are screwed at both ends of the shell (7). The closing bolts (15) are sealed and connected to the shell (7) via a sealing ring.

3. The lubricating oil filter pressure differential signal device according to claim 1, characterized in that: The top ends of the high-pressure chamber and the low-pressure chamber are both connected to an exhaust pipe (16). Two retaining rings (17) are provided inside the exhaust pipe (16) along the axis of the exhaust pipe (16). A buoyancy ball (18) is provided between the retaining rings (17) to slide. The buoyancy ball (18) can close the retaining rings (17), and a gap is provided between the buoyancy ball (18) and the exhaust pipe (16).

4. The lubricating oil filter pressure differential signal device according to claim 1, characterized in that: A strong magnetic filter plate (19) is provided inside the high-pressure pipe (3).

5. The lubricating oil filter pressure differential signal device according to claim 4, characterized in that: The connecting pipe (1) is provided with a through groove (20), the strong magnetic filter plate (19) is fixedly connected to the filter plate (2) via a connecting ring (21), the connecting ring (21) closes the through groove (20) via a sealing plate (22), a handle is provided on the sealing plate (22), and the sealing plate (22) is sealed and connected to the connecting pipe (1) via a buckle (23).

6. The lubricating oil filter pressure differential signal device according to claim 1, characterized in that: The inner side wall of the housing (7) is provided with a guide key (24), and the side walls of the high-voltage magnetic plate (10) and the low-voltage magnetic plate (11) are provided with guide grooves that cooperate with the guide key (24).

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