A honing oil treatment system for a zirconium tube honing apparatus

Abstract

The present application relates to a kind of honing oil processing systems for zirconium tube honing equipment, including honing oil filtering system and honing oil cooling system, honing oil filtering system includes equipment oil tank, sediment tank, Y filter, first oil pump, first filtering circuit and second filtering circuit, equipment oil tank is communicated with sediment tank by connecting pipeline, sediment tank, Y filter and first oil pump are sequentially connected in equipment oil tank after, first filtering circuit and second filtering circuit are parallelly connected in first oil pump after;After honing oil is processed by honing oil filtering system, it flows to honing oil cooling system again.The honing oil processing system can effectively ensure the filtering precision of zirconium tube honing oil by setting multiple filters, avoid the problems such as oil stone blockage, honing head jamming and scratching the surface of workpiece caused by incomplete filtration, and can also effectively control the temperature of honing oil, avoid the occurrence of the situation that the machining precision is reduced due to the temperature is too high, improve the use experience.

Description

Technical Field

[0001] This invention relates to the field of honing equipment technology, and more specifically to a honing oil treatment system for zirconium tube honing equipment. Background Technology

[0002] Honing equipment is a machine tool that uses an oilstone (or honing stone) on a honing head to precisely grind the surface of holes in a workpiece. It is a type of grinding machine that removes trace amounts of material from the workpiece surface through the rotation and reciprocating motion of the honing head, creating a cross-hatched pattern, thus achieving high-precision machining. Honing equipment is mainly used for the finishing and ultra-precision machining of high-precision hole parts, and is widely used in the automotive, tractor, aerospace, hydraulic equipment, and engine manufacturing industries.

[0003] Honing oil, as a dedicated cooling and lubricating medium for the honing process, performs two core functions: First, it carries away the large amount of heat generated by the friction between the honing head and the workpiece surface through circulation, stabilizing the working temperature at around 25℃. This prevents thermal deformation, increased vibration, and precision degradation caused by temperature rise, which is particularly important for large-scale continuous production and large-volume production. Second, it promptly flushes and transports the honing particles generated during the finishing process to the filtration system, avoiding quality risks such as oilstone blockage, honing head jamming, and workpiece surface scratches caused by particle accumulation, thereby ensuring process stability.

[0004] Existing honing oil filtration systems typically employ a combination of magnetic attraction and filter screens. Magnetic adsorption removes ferrous metal particles, while the filter screen intercepts remaining impurities. However, this filtration method has fundamental drawbacks for honing zirconium alloy tubes: zirconium alloy is a non-magnetic material, and its honing powder cannot be effectively separated by magnetic attraction; more critically, zirconium alloy powder is classified as a hazardous chemical, posing a significant risk of deflagration when exposed to air. Traditional open-type filtration systems cannot completely prevent dust escape, posing safety hazards. Therefore, a dedicated filtration technology suitable for zirconium tube honing oil is urgently needed to achieve safe filtration of the honing oil in zirconium tube honing equipment. Summary of the Invention

[0005] To overcome the shortcomings of the prior art, the present invention aims to provide a honing oil treatment system for zirconium tube honing equipment. This honing oil treatment system, by setting multiple filters, can effectively filter the honing oil of zirconium tubes, avoiding problems such as oilstone clogging, honing head jamming, and scratching of the workpiece surface caused by incomplete filtration. At the same time, it can also effectively control the temperature of the honing oil, avoiding the decrease in processing accuracy due to excessive temperature, improving the user experience, and facilitating the promotion and application of the above-mentioned honing oil treatment system in the field of honing equipment technology.

[0006] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: a honing oil treatment system for zirconium tube honing equipment, comprising a honing oil filtration system and a honing oil cooling system. The honing oil filtration system includes an equipment oil tank, a sedimentation tank, a Y-type filter, a first oil pump, a first filtration circuit, and a second filtration circuit. The equipment oil tank is connected to the sedimentation tank via a connecting pipeline. The sedimentation tank, the Y-type filter, and the first oil pump are sequentially connected after the equipment oil tank. The first filtration circuit and the second filtration circuit are connected in parallel after the first oil pump. The honing oil is then processed by the honing oil filtration system before flowing to the honing oil cooling system.

[0007] As a preferred embodiment of the present invention, the honing oil filtration system further includes a waste liquid tank, the sedimentation tank is provided with a drain port, and a drain pipe with a first drain ball valve is connected between the drain port and the waste liquid tank.

[0008] In a preferred embodiment of the present invention, the drain outlet is located at the center of the bottom of the sedimentation tank.

[0009] As a preferred embodiment of the present invention, the sedimentation tank is provided with a level gauge capable of providing a liquid level signal, the liquid level signal including a high liquid level signal and a low liquid level signal.

[0010] As a preferred embodiment of the present invention, the first filtration circuit includes a first solenoid valve, a first pressure switch, a first bag filter, and a second solenoid valve connected in sequence; the second filtration circuit includes a third solenoid valve, a second pressure switch, a second bag filter, and a fourth solenoid valve connected in sequence; when the honing oil in the settling tank is at a high level, the first oil pump is started, and the honing oil in the settling tank is drawn out by the first oil pump and enters the first bag filter after passing through the first solenoid valve and the first pressure switch for filtration. The filtered honing oil enters the honing oil cooling system through the second solenoid valve.

[0011] In a preferred embodiment of the present invention, when the working pressure of the first pressure switch in the first filter circuit is higher than the set pressure, the first solenoid valve and the second solenoid valve are closed, and the third solenoid valve and the fourth solenoid valve are opened, so that the honing oil is filtered through the second filter circuit.

[0012] As a preferred embodiment of the present invention, the honing oil cooling system includes a honing oil tank, a second oil pump, a plate heat exchanger, a chiller, a fifth solenoid valve, and an oil spray nozzle. The honing oil tank is equipped with an oil temperature probe. When the oil temperature is higher than the set temperature, the chiller is started, and the second oil pump draws the honing oil from the honing oil tank to the plate heat exchanger for heat dissipation and cooling. After the honing oil temperature drops below the set temperature, it is sprayed out from the oil spray nozzle through the fifth solenoid valve.

[0013] As a preferred embodiment of the present invention, it further includes a return oil pipeline, which is located before the fifth solenoid valve and has a second drain ball valve. When the equipment stops spraying oil, the fifth solenoid valve is closed and the second drain ball valve is opened, so that the cooled honing oil flows back to the honing oil tank.

[0014] In a preferred embodiment of the present invention, the return oil pipeline is located directly above the honing oil tank.

[0015] In a preferred embodiment of the present invention, the sedimentation tank is positioned lower than the oil tank of the equipment.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The honing oil treatment system for zirconium tube honing equipment of the present invention has an ingenious layout. By setting up a sedimentation tank, a Y-type filter, a first oil pump, and a first filter circuit and a second filter circuit connected in parallel, the sedimentation tank is used to perform preliminary treatment of the honing oil to separate the waste liquid containing zirconium alloy powder from the honing oil containing zirconium alloy powder. Then, the honing oil containing zirconium alloy powder is filtered by the subsequent Y-type filter and filter circuit. The first filter circuit and the second filter circuit are set in parallel, so they can be used alternately. This can effectively avoid downtime caused by filter bag blockage while ensuring filtration effect. At the same time, the temperature of the honing oil can be effectively controlled by the subsequent honing oil cooling system to avoid the decrease in processing accuracy caused by excessive temperature, improve the user experience, and promote the application of the above-mentioned honing oil treatment system in the field of honing equipment technology. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the piping connection of a honing oil treatment system for a zirconium tube honing equipment according to an embodiment.

[0018] Attached reference numerals: 1. Equipment oil tank; 2. Sedimentation tank; 2-1. Drain outlet; 3. Y-type filter; 4. First oil pump; 5. Waste liquid tank; 6. First drain ball valve; 7. First solenoid valve; 8. First pressure switch; 9. First bag filter; 10. Second solenoid valve; 11. Third solenoid valve; 12. Second pressure switch; 13. Second bag filter; 14. Fourth solenoid valve; 15. Honing oil tank; 16. Second oil pump; 17. Plate heat exchanger; 18. Refrigeration unit; 19. Oil temperature probe; 20. Fifth solenoid valve; 21. Oil spray nozzle; 22. Second drain ball valve; 23. Level gauge; 24. Drain pipe; 25. Return oil pipe. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention is described below with reference to specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0020] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0021] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0022] Example: Figure 1As shown, a honing oil treatment system for zirconium tube honing equipment mainly consists of a honing oil filtration system and a honing oil cooling system. This system filters and cools the honing oil containing zirconium alloy powder, ensuring effective filtration while controlling the temperature of the honing oil to prevent a decrease in processing accuracy due to excessive temperature. Because zirconium alloy powder is non-magnetic and a hazardous chemical, posing a risk of deflagration when exposed to air, the honing oil treatment system in this embodiment employs a fully enclosed bag filter and a sealed waste liquid collection system. This effectively prevents zirconium powder from contacting air, thus ensuring the safety of the processing. Specifically, the honing oil filtration system in this embodiment includes an equipment oil tank 1, a sedimentation tank 2, a Y-type filter 3, a first oil pump 4, a first filtration circuit, and a second filtration circuit. The equipment oil tank 1 collects the high-temperature zirconium-containing powder honing oil returning from the honing equipment, serving as a primary temporary storage container for the system and providing buffer volume for subsequent sedimentation treatment. The aforementioned settling tank 2 utilizes gravity settling to separate the honing oil, allowing zirconium alloy particles to settle to the bottom, thus achieving preliminary oil purification. The settling tank 2 is also equipped with a level gauge 23 to monitor the liquid level in real time, providing a signal for the start / stop control of the first oil pump 4 and preventing dry pumping or overflow. The aforementioned level signal includes both high and low level signals. The aforementioned Y-type filter 3 can intercept larger coarse zirconium alloy grinding debris, protecting the first oil pump 4 and subsequent precision filter elements from damage caused by large particle impacts, extending the system's service life. The aforementioned first oil pump 4 provides power to the entire filtration circuit, stably delivering the honing oil, settled in the settling tank 2 and coarsely filtered by the Y-type filter 3, to the first and second filtration circuits, ensuring that the oil circulation flow rate meets the requirements of continuous production.

[0023] The aforementioned settling tank 2 is positioned lower than the equipment oil tank 1. This height difference allows the honing oil containing zirconium powder to flow naturally from the equipment oil tank 1 into the settling tank 2, eliminating the need for an additional feed pump, simplifying the system structure and reducing energy consumption. Simultaneously, the oil flow rate slows upon entry, extending the zirconium particle settling time and improving sedimentation and separation efficiency, thus reducing the load on subsequent precision filtration. The low-positioning, combined with the unidirectional flow design, also prevents the backflow of zirconium-containing hazardous waste oil into the equipment oil tank 1 during shutdowns or liquid level fluctuations, ensuring that the zirconium powder always flows downstream in a unidirectional direction. This avoids seal failure and powder leakage due to pipeline pressure imbalance, meeting the safety isolation requirements for hazardous chemicals.

[0024] The first and second filtration circuits are connected in parallel. Specifically, the first filtration circuit includes a first solenoid valve 7, a first pressure switch 8, a first bag filter 9, and a second solenoid valve 10 connected in sequence; the second filtration circuit includes a third solenoid valve 11, a second pressure switch 12, a second bag filter 13, and a fourth solenoid valve 14 connected in sequence. When the honing oil in the settling tank 2 is at a high level, the first oil pump 4 is started. The first oil pump 4 draws out the honing oil from the settling tank 2 and passes it through the first solenoid valve 7 and the first pressure switch 8 before entering the first bag filter 9 for filtration. The filtered honing oil then enters the honing oil cooling system through the second solenoid valve 10. When the working pressure of the first pressure switch 8 in the first filtration circuit exceeds the set pressure, the first solenoid valve 7 and the second solenoid valve 10 close, and the third solenoid valve 11 and the fourth solenoid valve 14 open, allowing the honing oil to be filtered through the second filtration circuit. The two filtration circuits described above can be switched via solenoid valves to allow one circuit to operate while the other remains standby, or both can operate simultaneously. Seamless switching is possible when the bag filter in one circuit becomes clogged (due to differential pressure monitoring via a pressure switch), ensuring uninterrupted honing operations. The bag filter captures fine zirconium powder with a precision of 5-25μm, effectively preventing honing stone clogging and honing head jamming. In this embodiment, the filtration cooling system can also be equipped with differential pressure alarms and automatic drainage functions to achieve long-term continuous and stable operation, meeting the needs of large-scale production.

[0025] In this embodiment, to completely eliminate the risk of deflagration caused by zirconium alloy powder being exposed to air, the honing oil filtration system further includes a waste liquid tank 5. The waste liquid tank 5 serves as a sealed, explosion-proof collection container, safely storing the high-concentration zirconium alloy powder waste liquid periodically discharged from the sedimentation tank 2 through inert gas protection and grounding measures. The sedimentation tank 2 is equipped with a drain port 2-1, and a drain pipe 24 with a first drain ball valve 6 connects the drain port 2-1 to the waste liquid tank 5. The drain port 2-1 is located at the center of the bottom of the sedimentation tank 2, that is, at the lowest point of the cone-shaped bottom surface of the sedimentation tank 2. The central location, combined with a conical or sloping bottom design, forms the lowest point of gravity convergence, causing high-density zirconium alloy particles to naturally gather towards the center. This eliminates any residue at the edges during discharge, avoiding the risk of accidental combustion or explosion due to long-term powder accumulation. Furthermore, the centrally symmetrical layout ensures uniform axisymmetric flow during discharge, reducing eddies and turbulence, preventing the settled zirconium powder from being re-entrained, and ensuring the continuity and reliability of the sedimentation separation effect. When the honing equipment is shut down, the first drain ball valve 6 and the drain port of the Y-type filter 3 are periodically opened to safely transfer the deposited zirconium powder slurry to the waste liquid tank 5 within a closed pipeline system, achieving reliable discharge and isolation of hazardous waste. Finally, the waste liquid containing zirconium alloy is entrusted to a specialized agency for treatment.

[0026] The honing oil cooling system in this embodiment mainly consists of a honing oil tank 15, a second oil pump 16, a plate heat exchanger 17, a refrigerator 18, a fifth solenoid valve 20, and an oil spray nozzle 21. The honing oil tank 15 serves as the oil storage and buffer container for the cooling system, temporarily storing the honing oil filtered by the filtration system. The second oil pump 16 provides power to the cooling system, stably transporting the honing oil from the tank 15 to the plate heat exchanger 17. The plate heat exchanger 17 serves as the core heat exchanger. The unit utilizes its compact and efficient corrugated plate structure to achieve rapid heat transfer between the honing oil and the cooling water (or refrigerant) provided by the refrigeration unit, reducing the honing oil temperature to a set value. The aforementioned refrigeration unit 18, as an active refrigeration unit, automatically adjusts its refrigeration power based on the feedback signal from the oil temperature probe 19 installed in the honing oil tank 15, providing a continuous cold source for the plate heat exchanger 17. This ensures that even when honing workpieces with large allowances and long holes, the oil temperature can be stably controlled within an accuracy range of 25℃±2℃ to meet the usage requirements. The oil temperature probe 19 can monitor the temperature of the honing oil in the honing oil tank 15 in real time and convert it into an electrical signal, which serves as the control basis for the start-up and power adjustment of the refrigeration unit 18, forming a closed-loop temperature control system to prevent honing vibration and workpiece thermal deformation caused by overheating. The fifth solenoid valve 20 controls the on / off state and flow regulation of the cooling circuit, automatically opening and closing according to the processing status of the equipment (such as start-up, standby, shutdown, etc.) to achieve energy-saving operation, and can be linked with the oil temperature probe 19 to achieve precise temperature control. In this embodiment, by setting the oil spray nozzle 21, the constant temperature honing oil treated by the honing oil treatment system is directly sprayed into the contact area between the honing head and the workpiece surface in the form of a mist or jet, which quickly removes local frictional heat, ensuring that the temperature of the processing area is uniform and stable, thereby ensuring the dimensional accuracy and surface quality of the workpiece during the honing process. Specifically, when the oil temperature probe 19 detects that the oil temperature in the honing oil tank 15 is higher than the set temperature, the refrigeration unit 18 is started, and the second oil pump 16 draws the honing oil in the honing oil tank 15 to the plate heat exchanger 17 for heat dissipation and cooling. After the honing oil is lower than the set temperature or meets the set temperature requirements, it is sprayed out from the oil nozzle 21 through the fifth solenoid valve 20. The plate heat exchanger 17 and the refrigeration unit 18 are linked to maintain the honing oil working temperature stably at the required working temperature, avoiding honing vibration and workpiece thermal deformation caused by temperature rise, and ensuring dimensional accuracy and surface roughness during large-scale production with large margins.

[0027] The honing oil treatment system in this embodiment also includes a return oil pipeline 25, which is located before the fifth solenoid valve 20. The return oil pipeline 25 has a second drain ball valve 22. When the equipment stops spraying oil, the branch leading to the equipment can be cut off by closing the fifth solenoid valve 20. If the oil is not drained in time, cooled honing oil will remain in the pipeline between the plate heat exchanger 17 and the fifth solenoid valve 20. This portion of oil, due to the loss of circulation, will absorb ambient heat and cause its temperature to rise as the downtime increases. This embodiment, by setting up the return oil pipeline 25, can guide this portion of cooling oil back to the honing oil tank 15 at the moment of shutdown, preventing the spraying of oil with substandard temperature during the next startup. This ensures that the temperature control accuracy remains stable within the range of 25℃±2℃, eliminating honing vibration and workpiece dimensional deviations caused by oil temperature fluctuations. The aforementioned return oil pipeline 25 is located directly above the honing oil tank 15. Utilizing the difference in gravitational potential energy, when the fifth solenoid valve 20 is closed and the second drain ball valve 22 is open, the residual cooling honing oil in the pipeline can automatically and quickly flow back to the honing oil tank 15 under its own weight. This eliminates the need for an additional return pump or power unit, simplifying the system structure and reducing energy consumption and failure rate.

[0028] This embodiment presents a honing oil treatment system for zirconium tube honing equipment. The system features a clever layout, incorporating a sedimentation tank 2, a Y-type filter 3, a first oil pump 4, and a first and second filtration circuit connected in parallel. The sedimentation tank 2 performs preliminary treatment of the honing oil, separating the waste liquid containing zirconium alloy powder from the honing oil containing the powder. The remaining honing oil containing zirconium alloy powder is then filtered by the Y-type filter 3 and the filtration circuits. The parallel connection of the first and second filtration circuits allows for alternating use, effectively preventing downtime due to filter bag clogging while maintaining filtration efficiency. Furthermore, the subsequent honing oil cooling system effectively controls the temperature of the honing oil, preventing a decrease in processing accuracy due to excessive temperature, thus improving the user experience and facilitating the promotion and application of this honing oil treatment system in the field of honing equipment technology.

[0029] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention; therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0030] Although this document frequently uses the following reference numerals from the figures: 1. Equipment oil tank; 2. Sedimentation tank; 2-1. Drain outlet; 3. Y-type filter; 4. First oil pump; 5. Waste liquid tank; 6. First drain ball valve; 7. First solenoid valve; 8. First pressure switch; 9. First bag filter; 10. Second solenoid valve; 11. Third solenoid valve; 12. Second pressure switch; 13. Second bag filter; 14. Fourth solenoid valve; 15. Honing oil tank; 16. Second oil pump; 17. Plate heat exchanger; 18. Refrigeration unit; 19. Oil temperature probe; 20. Fifth solenoid valve; 21. Oil spray nozzle; 22. Second drain ball valve; 23. Level gauge; 24. Drain pipe; 25. Return oil pipe, etc., the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

Claims

1. A honing oil treatment system for zirconium tube honing equipment, characterized in that: The system includes a honing oil filtration system and a honing oil cooling system. The honing oil filtration system includes an equipment oil tank (1), a sedimentation tank (2), a Y-type filter (3), a first oil pump (4), a first filtration circuit, and a second filtration circuit. The equipment oil tank (1) is connected to the sedimentation tank (2) via a connecting pipeline. The sedimentation tank (2), the Y-type filter (3), and the first oil pump (4) are sequentially connected to the equipment oil tank (1). The first filtration circuit and the second filtration circuit are connected in parallel after the first oil pump (4). The first filter includes a first solenoid valve (7), a first pressure switch (8), a first bag filter (9), and a second solenoid valve (10) connected in sequence; the second filter circuit includes a third solenoid valve (11), a second pressure switch (8), a second bag filter (9), and a fourth solenoid valve (14) connected in sequence; when the honing oil in the settling tank (2) is at a high level, the first oil pump (4) is started, and the honing oil in the settling tank (2) is drawn out by the first oil pump (4) and passes through the first solenoid valve (7) and the second solenoid valve (9). After a pressure switch (8) is activated, the honed oil enters the first bag filter (9) for filtration. The filtered honed oil then enters the honed oil cooling system through the second solenoid valve (10). When the working pressure of the first pressure switch (8) in the first filter circuit is higher than the set pressure, the first solenoid valve (7) and the second solenoid valve (10) are closed, and the third solenoid valve (11) and the fourth solenoid valve (14) are opened, allowing the honed oil to be filtered through the second filter circuit. The honed oil cooling system includes a honed oil tank ( 15) Second oil pump (16), plate heat exchanger (17), refrigerator (18), fifth solenoid valve (20) and oil nozzle (21). The honing oil tank (15) is equipped with an oil temperature probe (19). When the oil temperature is higher than the set temperature, the refrigerator (18) is started, and the second oil pump (16) draws the honing oil in the honing oil tank (15) to the plate heat exchanger (17) for heat dissipation and cooling. After the honing oil is lower than the set temperature, it is sprayed out from the oil nozzle (21) through the fifth solenoid valve (20).

2. The honing oil treatment system for a zirconium tube honing equipment according to claim 1, characterized in that: The honing oil filtration system also includes a waste liquid tank (5), the sedimentation tank (2) is provided with a drain port (2-1), and a drain pipe (24) with a first drain ball valve (6) is connected between the drain port (2-1) and the waste liquid tank (5).

3. The honing oil treatment system for a zirconium tube honing equipment according to claim 2, characterized in that: The drain port (2-1) is located at the center of the bottom of the sedimentation tank (2).

4. The honing oil treatment system for zirconium tube honing equipment according to claim 2, characterized in that: The sedimentation tank (2) is equipped with a level gauge (23) that can provide a level signal, which includes a high level signal and a low level signal.

5. The honing oil treatment system for a zirconium tube honing equipment according to claim 1, characterized in that: It also includes a return oil pipeline (25), which is located before the fifth solenoid valve (20) and has a second drain ball valve (22). When the equipment stops spraying oil, the fifth solenoid valve (20) is closed and the second drain ball valve (22) is opened, and the cooled honing oil flows back to the honing oil tank (15).

6. The honing oil treatment system for a zirconium tube honing equipment according to claim 5, characterized in that: The return oil pipeline (25) is located directly above the honing oil tank (15).

7. The honing oil treatment system for a zirconium tube honing equipment according to claim 1, characterized in that: The sedimentation tank (2) is positioned lower than the oil tank (1) of the equipment.

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