Multi-stage filtering device and filtering process for grinding fluid of grinding machine

Abstract

The invention discloses a multi-stage filtering device and a filtering process for grinding fluid of a grinding machine, and the multi-stage filtering device mainly comprises a supporting bottom frame, a filtering box, a horizontal filter, a sewage pump, a static ring settling box, a static ring water pump and the like. Efficient stepped precipitation of the grinding fluid is realized, the pressure of the horizontal filter is greatly reduced, the filtering effect is improved, and the service life is prolonged. The innovative design of the static ring settling tank is combined with hoisting equipment, so that sludge is quickly cleaned, and manpower is saved. The second settling tank shaped like the Arabic numeral seven and the guide rail are designed to provide sufficient walking space for the horizontal filter, and cleaning is convenient; the waste output ends of the paper filter and the magnetic filter are arranged in different directions, and the waste mixed loading problem is solved. In addition, the device is further provided with intelligent monitoring facilities such as an ultrasonic liquid level meter, a liquid level alarm, a water supplementing pipe and an electromagnetic valve, and stable operation is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of grinding fluid filtration, and in particular to a multi-stage filtration device and a filtration process for grinding fluid of a grinder. Background Art

[0002] During the production process of hot rolling rolls, due to the long-term high temperature and high pressure rolling force, fatigue layers will be generated on the roll surface, affecting the rolling quality and product precision. Therefore, hot rolling rolls must be ground again after leaving the machine to eliminate the fatigue layer on the roll surface and restore the original roll shape. During the grinding process, the grinding volume is large, which places extremely high demands on the grinding fluid filtration system.

[0003] However, the horizontal filter in the prior art often cannot meet the grinding volume requirements of daily production when the grinding volume is large. This leads to serious blockage of the filtration system, high equipment failure rate, and insufficient filtration capacity. At the same time, the amount of grinding mud generated during the grinding process is large, which not only increases the pollution generated by the operation, but also increases the workload of maintenance. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the above technical defects and provide a multi-stage filtration device and filtration process for grinding fluid of a grinder. The present application improves the filtration capacity, reduces the equipment failure rate, reduces the amount of grinding mud dredging and operation pollution, and reduces the workload of maintenance through the ingenious combination of multi-stage sedimentation and multi-stage filtration.

[0005] In order to solve the above technical problems, the technical solution provided by the present invention is a multi-stage filtering device for grinding fluid of a grinding machine, comprising a supporting frame, a filter box and a horizontal filter, wherein the filter box is arranged on the supporting frame, the horizontal filter is arranged on the filter box, the filter box comprises a first sedimentation box and a second sedimentation box arranged on one side of the first sedimentation box; a partition is arranged in the first sedimentation box, and the partition divides the inner cavity of the first sedimentation box into a primary sedimentation tank, a secondary sedimentation tank and a tertiary sedimentation tank; a sewage pump is installed above the tertiary sedimentation tank through a first mounting plate, and the sewage pump is installed above the tertiary sedimentation tank through a first mounting plate. The pumping end of the water pump extends into the tertiary sedimentation tank through a pumping pipe; the second sedimentation tank is provided with an opening, and the horizontal filter includes a paper filter arranged at the opening of the second sedimentation tank and a magnetic filter arranged on the paper filter; the water outlet end of the sewage pump is provided with a water supply pipe extending to the top of the magnetic filter; a static ring sedimentation tank is also provided inside the second sedimentation tank, and an opening is provided on the static ring sedimentation tank; a static ring water pump is also installed at the opening of the second sedimentation tank through a second mounting plate, and the pumping end of the static ring water pump is provided with a grinding fluid suction pipe located above the opening of the static ring sedimentation tank.

[0006] Furthermore, the partition member includes a first partition and a second partition vertically arranged in the first sedimentation box, the two ends of the first partition are respectively connected to the front and rear inner walls of the first sedimentation box, the two ends of the second partition are respectively connected to the left inner wall of the first sedimentation box and the first partition, and the second partition and the first partition are perpendicular to each other, and the upper end of the first partition is provided with an overflow port located at the secondary sedimentation tank and the height of the first partition is less than the height of the overflow port.

[0007] Furthermore, the second sedimentation box is in a shape of a letter "U", the static ring sedimentation box is arranged in the lower cavity of the second sedimentation box in the shape of a letter "U", and both ends of the static ring sedimentation box are provided with hanging ears, and a guide rail is also arranged along the length direction at the opening of the second sedimentation box in the shape of a letter "U", and the lower end of the paper filter is rolled on the guide rail by a walking wheel.

[0008] Furthermore, a water guide plate is obliquely provided on the inner cavity extending outwardly of the second sedimentation box.

[0009] Furthermore, the bottom of the second sedimentation tank extends downward to form a low-level sewage pit.

[0010] Furthermore, the filter paper output end of the paper filter and the waste feed end of the magnetic filter are respectively arranged along the length direction and the width direction of the second sedimentation tank, the right end of the second sedimentation tank is provided with a filter paper collecting pool corresponding to the filter paper output end of the paper filter, and the rear of the second sedimentation tank is provided with a waste collection pool corresponding to the waste feed end of the magnetic filter.

[0011] Furthermore, the side wall of the second sedimentation tank is provided with an overflow pipe located above the primary sedimentation tank.

[0012] Furthermore, an ultrasonic liquid level meter is also provided on the first mounting plate and a liquid level alarm is also installed on the side wall of the first sedimentation tank.

[0013] Furthermore, a water supply pipe is provided on the second mounting plate and a solenoid valve is provided on the water supply pipe.

[0014] The present application also provides a multi-stage filtration process for grinding fluid of a grinding machine, comprising the following steps:

[0015] S1. Grinding fluid collection and graded sedimentation

[0016] During the grinding process, the grinding fluid containing impurities is sprayed and flows into the primary sedimentation tank in the first sedimentation tank for preliminary sedimentation;

[0017] As the grinding fluid level rises, when the grinding fluid in the primary sedimentation tank reaches the height of the overflow port on the first baffle, the grinding fluid flows into the secondary sedimentation tank; when the liquid level in the secondary sedimentation tank continues to rise and reaches the height of the second baffle, the grinding fluid finally flows into the third sedimentation tank;

[0018] S2. Impurity adsorption and fine filtration

[0019] The grinding fluid after the three-stage precipitation is extracted by a sewage pump through a suction pipe and transported to the magnetic filter in the horizontal filter to adsorb and remove unprecipitated iron impurities;

[0020] Then, the grinding fluid flows into the paper filter, through which the unprecipitated grit impurities are further filtered out;

[0021] S3, Grinding fluid standing and reprecipitation

[0022] The filtered grinding fluid flows into the static ring sedimentation tank in the second sedimentation tank for static standing, wherein trace impurities are further accumulated between the bottom of the static ring sedimentation tank and the second sedimentation tank;

[0023] S4. Grinding fluid recycling

[0024] The grinding fluid after standing is extracted by the static ring water pump through the grinding fluid suction pipe and transported to the grinding machine for recycling;

[0025] S5. Fault alarm and handling

[0026] An ultrasonic level meter and a level alarm are installed above the tertiary sedimentation tank. When the sewage pump fails and the water level rises to the set value, the level alarm is triggered to remind the operator to handle it in time.

[0027] If the static ring water pump fails and causes the liquid level in the second sedimentation tank to rise to the level of the overflow pipe, the water will flow back to the third-stage sedimentation tank through the overflow pipe and trigger the liquid level alarm to prompt the operator to handle it;

[0028] When the water level in the first sedimentation tank drops to the set value, the grinding fluid triggers the ultrasonic level meter and alarm to alarm, and at the same time starts the solenoid valve on the water supply pipe to automatically replenish water;

[0029] S6. Waste collection and treatment

[0030] The waste output ends of the magnetic filter and the paper filter in the horizontal filter are respectively arranged along the length direction and the width direction of the second sedimentation tank, and the waste is collected into the waste collection pool and the filter paper collection pool respectively, so as to realize the automatic packaging of the waste;

[0031] S7. Pool cleaning operation

[0032] After the grinding fluid has been used for one year or when the pool is cleaned as needed, the travel wheel under the sliding paper filter can be moved on the guide rail to open the opening of the second sedimentation tank, and the internal static ring sedimentation tank can be lifted out using a crane or other tools for dumping; at the same time, a submersible pump is placed in the low-level sewage pit to extract the residual sediment in the second sedimentation tank for cleaning and replacement.

[0033] The advantages of the present invention compared with the prior art are:

[0034] 1. This application achieves efficient step-by-step sedimentation of the grinding fluid through the cleverly arranged primary sedimentation tank, secondary sedimentation tank and tertiary sedimentation tank, effectively precipitates about 60% of the grinding sludge, greatly reduces the filtration pressure of the horizontal filter, improves the filtration effect, extends the service life of the horizontal filter, and significantly enhances the overall filtration capacity.

[0035] 2. The innovative static ring sedimentation box design of this application, combined with lifting equipment and high-pressure flushing equipment, realizes the rapid cleaning of sludge without the need for manual entry into the sedimentation box, greatly saving manpower and reducing operation difficulty and maintenance costs.

[0036] 3. This application provides sufficient walking space for the horizontal filter through the 7-shaped second sedimentation box and guide rail design, which is convenient for lifting out and cleaning the static ring sedimentation box; at the same time, the separate directional settings of the waste output ends of the paper filter and the magnetic filter solve the problem of mixed waste loading and improve the material separation efficiency.

[0037] In summary, this application has solved many challenges of the prior art in grinding fluid filtration through a series of technological innovations, achieved significant improvements in filtration efficiency, dredging convenience, spatial layout optimization and intelligent monitoring, and provided an efficient, environmentally friendly and reliable grinding fluid circulation filtration solution for the hot rolling roll grinding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic structural diagram of a multi-stage filtering device for grinding fluid of a grinder according to the present application.

[0039] Figure 2 It is an enlarged schematic diagram of the internal structure of the first sedimentation box in this application.

[0040] Figure 3 It is a side view structural schematic diagram of a multi-stage filtering device for grinding fluid of a grinder according to the present application.

[0041] Figure 4 It is a schematic diagram of the internal structure of a multi-stage filtering device for grinding fluid of a grinder according to the present application.

[0042] Figure 5 This is a schematic diagram of a multi-stage filtration process flow for grinding fluid of a grinder according to the present application.

[0043] As shown in the figure: 1. Support chassis, 2. Filter box, 201. First sedimentation box, 202. Second sedimentation box, 203. Primary sedimentation tank, 204. Secondary sedimentation tank, 205. Tertiary sedimentation tank, 3. Horizontal filter, 301. Paper filter, 302. Magnetic filter, 4. First mounting plate, 5. Sewage pump, 6. Static ring sedimentation tank, 7. Second mounting plate, 8. Static ring water pump, 9. Grinding fluid suction pipe, 10. First partition, 11. Second partition, 12. Overflow port, 13. Lifting ear, 14. Guide rail, 15. Travel wheel, 16. Water guide plate, 17. Low-level sewage pit, 18. Filter paper collection tank, 19. Waste collection tank, 20. Overflow pipe, 21. Ultrasonic level meter, 22. Liquid level alarm, 23. Water supply pipe, 24. Solenoid valve, 25. Water supply pipe. DETAILED DESCRIPTION

[0044] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings, wherein the same components are represented by the same reference numerals.

[0045] It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to directions in the drawings, and the words "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0046] In order to make the contents of the present invention more clearly understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0047] See attached Figure 1 A multi-stage filtering device for grinding fluid of a grinding machine comprises a supporting frame 1, a filter box 2 and a horizontal filter 3, wherein the filter box 2 is arranged on the supporting frame 1, the horizontal filter 3 is arranged on the filter box 2, and the filter box 2 comprises a first sedimentation box 201 and a second sedimentation box 202 arranged on one side of the first sedimentation box 201;

[0048] Inside the first sedimentation tank 201 , the present application provides partitions, which cleverly divide the inner cavity of the first sedimentation tank 201 into a primary sedimentation tank 203 , a secondary sedimentation tank 204 and a tertiary sedimentation tank 205 .

[0049] In particular, a sewage pump 5 is fixed above the tertiary sedimentation tank 205 through the first mounting plate 4, and the pumping end of the sewage pump 5 penetrates into the tertiary sedimentation tank 205 through the pumping pipe. A sewage pump 5 is installed above the tertiary sedimentation tank 205 through the first mounting plate 4, and the pumping end of the sewage pump 5 extends into the tertiary sedimentation tank 205 through the pumping pipe;

[0050] The design of the second sedimentation tank 202 is also ingenious, and an opening is provided on it for installing the horizontal filter 3. The horizontal filter 3 specifically includes a paper filter 301 arranged at the opening of the second sedimentation tank 202, and a magnetic filter 302 located above the paper filter 301. The water outlet of the sewage pump 5 is connected to an upper water pipe 25, which extends to the top of the magnetic filter 302, so as to transport the grinding fluid after the three-stage sedimentation to the magnetic filter 302 for further filtration.

[0051] In addition, a static ring sedimentation box 6 is also provided inside the second sedimentation box 202, and the static ring sedimentation box 6 is also provided with an opening. At the opening of the second sedimentation box 202, the present application installs a static ring water pump 8 through a second mounting plate 7, and the pumping end of the static ring water pump 8 is connected to the static ring sedimentation box 6 through a grinding fluid suction pipe 9 located above the opening of the static ring sedimentation box 6.

[0052] When using the present application, the grinding fluid to be filtered is firstly transported to the primary sedimentation tank 203 of the first sedimentation tank 201 by a pump. With the injection and sedimentation of the grinding fluid, the water level gradually rises and overflows into the secondary sedimentation tank 204. Similarly, after the injection and sedimentation of the grinding fluid in the secondary sedimentation tank 204, the water level will continue to rise and overflow into the tertiary sedimentation tank 205 for further sedimentation. This three-stage sedimentation process can precipitate about 60% of the grinding sludge. Subsequently, the sewage containing the remaining 40% of the grinding material is pumped into the upper water pipe 25 by the sewage pump 5 and transported to the magnetic filter 302 for filtration. After being filtered by the magnetic filter 302, the grinding fluid flows through the paper filter 301 and finally flows into the second sedimentation tank 202. In the second sedimentation tank 202, the grinding fluid will further precipitate, and most of the sludge will settle in the static ring sedimentation tank 6. A small amount of sludge will settle in the gap between the outer wall and the inner wall of the second sedimentation tank 202.

[0053] See attached Figure 4 In order to clean the sludge in the second sedimentation box 202, please lift it by hanging it on the lifting lug 13 of the static ring sedimentation box 6 through the lifting equipment, and the static ring sedimentation box 6 can be easily taken out from the second sedimentation box 202 and cleaned. When the static ring sedimentation box 6 is taken out, the sludge deposited between the outer wall and the inner wall of the second sedimentation box 202 will collapse. At this time, the staff can also put it into the low-level sewage pit 17 (the low-level sewage pit 17 is formed by extending downward from the bottom of the second sedimentation box 202) through a submersible pump, and use a high-pressure flushing device to flush a small amount of sludge in the second sedimentation box 202. The water mixed with a small amount of sludge after flushing can be pumped out by a submersible pump, and there is no need to manually enter the second sedimentation box 202 for cleaning, thereby greatly saving manpower. Finally, the grinding fluid after precipitation and filtration will be pumped to the grinding machine for use through the water outlet of the static ring water pump 8.

[0054] Refer to the attached Figure 2 In order to realize the step-by-step sedimentation of the primary sedimentation tank 203, the secondary sedimentation tank 204 and the tertiary sedimentation tank 205, the partition member includes a first partition 10 and a second partition 11 vertically arranged in the first sedimentation tank 201, the two ends of the first partition 10 are respectively connected to the front and rear inner walls of the first sedimentation tank 201, the two ends of the second partition 11 are respectively connected to the left inner wall of the first sedimentation tank 201 and the first partition 10, and the second partition 11 and the first partition 10 are perpendicular to each other, and the upper end of the first partition 10 is provided with an overflow port 12 located at the secondary sedimentation tank 204, and the height of the first partition 10 is less than the height of the overflow port 12. First, the grinding fluid to be filtered is transported to the primary sedimentation tank 203 of the first sedimentation tank 201 by a pump, and after sedimentation in the primary sedimentation tank 203, the water level rises and flows into the secondary sedimentation tank 204 through the overflow port 12 for sedimentation, and when the secondary sedimentation tank 204 rises, it can ensure that the grinding fluid flows from the second partition 11 to the tertiary sedimentation tank 205. The three-stage filtration greatly reduces the filtration pressure of the horizontal filter 3, thereby improving the filtration effect of the horizontal filter 3 while extending the service life of the horizontal filter 3 and reducing the failure rate of the horizontal filter 3, thereby improving the filtration capacity.

[0055] Continue to refer to the attached Figure 4 In one embodiment, the second sedimentation box 202 is in a 7-shaped shape, the static ring sedimentation box 6 is arranged in the lower cavity of the second sedimentation box 202 in the 7-shaped shape, and the two ends of the static ring sedimentation box 6 are provided with lifting ears 13. The opening of the second sedimentation box 202 in the 7-shaped shape is also provided with a guide rail 14 along the length direction, and the lower end of the paper filter 301 is rolled on the guide rail 14 through the running wheel 15. The inner cavity extending outward from the second sedimentation box 202 is inclinedly provided with a water guide plate 16. The arrangement of the water guide plate 16 facilitates the grinding fluid filtered by the paper filter 301 to enter the static ring sedimentation box 6 in advance, thereby ensuring that most of the grinding fluid in the second sedimentation box 202 can be precipitated in the static ring sedimentation box 6. The second sedimentation box 202 in the 7-shaped shape also provides a large walking space for the entire horizontal filter 3. When the static ring sedimentation box 6 needs to be lifted out, the entire horizontal filter 3 only needs to be retracted to one end of the guide rail 14 to free up enough space, and there is no need to lift the horizontal filter 3.

[0056] Please refer to the attached Figure 3, the filter paper output end of the paper filter 301 and the waste feeding end of the magnetic filter 302 are respectively arranged along the length direction and the width direction of the second sedimentation box 202, and the right end of the second sedimentation box 202 is provided with a filter paper collection pool 18 corresponding to the filter paper output end of the paper filter 301, and the rear of the second sedimentation box 202 is provided with a waste collection pool 19 corresponding to the waste feeding end of the magnetic filter 302. This design can ensure that the filter paper filtered by the paper filter 301 and the waste filtered by the magnetic filter 302 can enter the filter paper collection pool 18 and the waste collection pool 19 respectively along two directions, which is convenient for material separation. It avoids the phenomenon that the waste filtered by the magnetic filter and the paper filter on the horizontal filter 3 in the prior art enters the sewage pool in the same direction, thereby solving the problem of mixed loading of waste grinding mud and filter paper in the sewage pool.

[0057] In addition, the present application also sets up a series of auxiliary facilities to further improve its performance and convenience. For example, the present application sets up an overflow pipe 20 located above the primary sedimentation tank 203 on the side wall of the second sedimentation tank 202. When the static ring water pump 8 fails and causes the water level to rise, the grinding fluid can flow back to the primary sedimentation tank 203 through the overflow pipe 20, thereby avoiding the pollution caused by the overflow of the grinding fluid. At the same time, the present application also sets up an ultrasonic level meter 21 and a liquid level alarm 22 on the first mounting plate 4. When the liquid level in the tertiary sedimentation tank 205 rises above the warning level, the liquid level alarm 22 will sound an alarm to remind the operator to deal with it in time. These improvements not only avoid the risk of pollution caused by overflowing water, but also can issue an alarm reminder in time when the sewage pump 5 fails.

[0058] Finally, the present application also sets a water supply pipe 23 and a solenoid valve 24 on the second mounting plate 7. Since the filtered grinding fluid in the second sedimentation tank 202 may be partially evaporated when not in use, in order to ensure the normal use of the grinding fluid and maintain its sufficient amount, the present application can inject clean water into the second sedimentation tank 202 through the water supply pipe 23. The solenoid valve 24 is used to control the opening and closing of the water supply pipe to achieve precise water supply operation.

[0059] Combined with Figure 5 The present application also provides a multi-stage filtration process for grinding fluid of a grinding machine, comprising the following steps:

[0060] S1. Grinding fluid collection and graded sedimentation

[0061] During the grinding process, the grinding fluid containing impurities is sprayed and flows into the primary sedimentation tank 203 in the first sedimentation tank 201 for preliminary sedimentation;

[0062] As the grinding fluid level rises, when the grinding fluid in the primary sedimentation tank 203 reaches the height of the overflow port 12 on the first baffle 10, the grinding fluid flows into the secondary sedimentation tank 204; when the liquid level in the secondary sedimentation tank 204 continues to rise and reaches the height of the second baffle 11, the grinding fluid finally flows into the third sedimentation tank 205;

[0063] S2. Impurity adsorption and fine filtration

[0064] The grinding fluid after the three-stage precipitation is extracted by the sewage pump 5 through the suction pipe and transported to the magnetic filter 302 in the horizontal filter 3 to absorb and remove the unprecipitated iron impurities;

[0065] Then, the grinding fluid flows into the paper filter 301, and the unprecipitated grit impurities are further filtered out by the filter paper;

[0066] S3, Grinding fluid standing and reprecipitation

[0067] The filtered grinding fluid flows into the static ring sedimentation tank 6 in the second sedimentation tank 202 for static standing, wherein trace impurities are further accumulated between the bottom of the static ring sedimentation tank 6 and the second sedimentation tank 202;

[0068] S4. Grinding fluid recycling

[0069] After being left to stand, the grinding fluid is extracted by the static ring water pump 8 through the grinding fluid suction pipe 9 and transported to the grinding machine for recycling;

[0070] S5. Fault alarm and handling

[0071] An ultrasonic level meter 21 and a level alarm 22 are provided above the third-stage sedimentation tank 205. When the sewage pump 5 fails and causes the water level to rise to a set value, the level alarm is triggered to remind the operator to handle it in time;

[0072] If the static ring water pump 8 fails and causes the liquid level in the second sedimentation tank 202 to rise to the liquid level of the overflow pipe 20, the water will flow back to the third-stage sedimentation tank 205 through the overflow pipe 20 and trigger a liquid level alarm to prompt the operator to handle it;

[0073] When the water level in the first sedimentation tank 201 drops to the set value, the grinding fluid triggers the ultrasonic level meter 21 and the alarm 22 to alarm, and at the same time starts the solenoid valve 24 on the water supply pipe 23 to automatically replenish water;

[0074] S6. Waste collection and treatment

[0075] The waste output ends of the magnetic filter 302 and the paper filter 301 in the horizontal filter 3 are respectively arranged along the length direction and the width direction of the second sedimentation tank 202, and the waste is collected in the waste collection pool 19 and the filter paper collection pool 18 respectively, so as to realize the automatic packaging of the waste;

[0076] S7. Pool cleaning operation

[0077] After the grinding fluid has been used for one year or when the pool is cleaned as needed, the walking wheel 15 under the sliding paper filter 301 can be moved on the guide rail 14 to open the opening of the second sedimentation box 202, and the internal static ring sedimentation box 6 can be lifted out using a crane or other tools for dumping; at the same time, a submersible pump is placed in the low-level sewage pit 17 to extract the residual sediment in the second sedimentation box 202 for cleaning and replacement.

[0078] In summary, the invention can solve many problems existing in the grinding machine filtration system, such as reducing the output of hazardous waste, reducing the consumption of grinding fluid stock solution, improving the equipment filtration and treatment capacity, improving water quality, reducing the failure rate, avoiding pipe blockage, and reducing the workload of manual pool cleaning, etc. Through the above process flow, the original annual output of 180 tons of hazardous waste can be successfully reduced to 18 tons / year, and the original consumption of grinding fluid stock solution can be reduced from 4.4 tons to 1 ton. The equipment filtration and treatment capacity has been significantly improved, and 95% of impurities in the grinding fluid have been effectively removed. After the water quality is improved, the failure rate of the filtration equipment is reduced, and the problem of pipe blockage can be avoided. At the same time, the workload of manual pool cleaning is eliminated, and the pollution during the operation process is reduced, which provides a strong guarantee for the efficient and environmentally friendly operation of the grinding machine processing.

[0079] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A multi-stage filtering device for grinding fluid of a grinding machine, comprising a supporting frame (1), a filter box (2) and a horizontal filter (3), wherein the filter box (2) is arranged on the supporting frame (1), and the horizontal filter (3) is arranged on the filter box (2), characterized in that: The filter box (2) comprises a first sedimentation box (201) and a second sedimentation box (202) arranged on one side of the first sedimentation box (201); A partition is provided in the first sedimentation tank (201), and the partition divides the inner cavity of the first sedimentation tank (201) into a primary sedimentation tank (203), a secondary sedimentation tank (204) and a tertiary sedimentation tank (205); A sewage pump (5) is installed above the tertiary sedimentation tank (205) via a first mounting plate (4), and a pumping end of the sewage pump (5) extends into the tertiary sedimentation tank (205) via a pumping pipe; The second sedimentation tank (202) is provided with an opening, and the horizontal filter (3) comprises a paper filter (301) arranged at the opening of the second sedimentation tank (202) and a magnetic filter (302) arranged on the paper filter (301); The water outlet of the sewage pump (5) is provided with a water supply pipe (25) extending to the top of the magnetic filter (302); A static ring sedimentation box (6) is also provided inside the second sedimentation box (202), and an opening is provided on the static ring sedimentation box (6); A static ring water pump (8) is also installed at the opening of the second sedimentation box (202) via a second mounting plate (7), and a grinding fluid suction pipe (9) is provided at the pumping end of the static ring water pump (8) which is located above the opening of the static ring sedimentation box (6).

2. The multi-stage filtering device for grinding fluid of a grinding machine according to claim 1, characterized in that: The partition member comprises a first partition (10) and a second partition (11) vertically arranged in a first sedimentation box (201); two ends of the first partition (10) are respectively connected to the front and rear inner walls of the first sedimentation box (201); two ends of the second partition (11) are respectively connected to the left inner wall of the first sedimentation box (201) and the first partition (10); the second partition (11) and the first partition (10) are perpendicular to each other; an overflow port (12) located at the secondary sedimentation tank (204) is provided at the upper end of the first partition (10); and the height of the first partition (10) is less than the height of the overflow port (12).

3. The multi-stage filtering device for grinding fluid of a grinding machine according to claim 1, characterized in that: The second sedimentation box (202) is in a 7-shape, the static ring sedimentation box (6) is arranged in the lower cavity of the 7-shaped second sedimentation box (202), and both ends of the static ring sedimentation box (6) are provided with hanging ears (13), and a guide rail (14) is also provided at the opening of the 7-shaped second sedimentation box (202) along the length direction, and the lower end of the paper filter (301) is rollingly arranged on the guide rail (14) through a walking wheel (15).

4. The multi-stage filtering device for grinding fluid of a grinding machine according to claim 3, characterized in that: The inner cavity of the second sedimentation box (202) extending outward is provided with a water guide plate (16) in an inclined manner.

5. The multi-stage filtering device for grinding fluid of a grinding machine according to claim 4, characterized in that: The bottom of the second sedimentation tank (202) extends downward to form a low-level sewage discharge pit (17).

6. A multi-stage filtering device for grinding fluid of a grinding machine according to claim 1 or 3, characterized in that: The filter paper output end of the paper filter (301) and the waste feeding end of the magnetic filter (302) are respectively arranged along the length direction and the width direction of the second sedimentation box (202); a filter paper collecting pool (18) corresponding to the filter paper output end of the paper filter (301) is arranged at the right end of the second sedimentation box (202); and a waste collecting pool (19) corresponding to the waste feeding end of the magnetic filter (302) is arranged at the rear of the second sedimentation box (202).

7. The multi-stage filtering device for grinding fluid of a grinding machine according to claim 1, characterized in that: The side wall of the second sedimentation tank (202) is provided with an overflow pipe (20) located above the primary sedimentation tank (203).

8. The multi-stage filtering device for grinding fluid of a grinding machine according to claim 1, characterized in that: An ultrasonic liquid level meter (21) is also provided on the first mounting plate (4), and a liquid level alarm (22) is also installed on the side wall of the first sedimentation tank (201).

9. The multi-stage filtering device for grinding fluid of a grinding machine according to claim 1, characterized in that: A water supply pipe (23) is provided on the second mounting plate (7), and a solenoid valve (24) is provided on the water supply pipe (23).

10. A multi-stage filtration process for grinding fluid of a grinding machine, characterized in that: The following steps are involved: S1. Grinding fluid collection and graded sedimentation During the grinding process, the grinding fluid containing impurities is sprayed and flows into the primary sedimentation tank (203) in the first sedimentation tank (201) for preliminary sedimentation; As the level of the grinding fluid rises, when the grinding fluid in the primary sedimentation tank (203) reaches the height of the overflow port (12) on the first baffle (10), the grinding fluid flows into the secondary sedimentation tank (204); when the level in the secondary sedimentation tank (204) continues to rise and reaches the height of the second baffle (11), the grinding fluid finally flows into the third sedimentation tank (205); S2. Impurity adsorption and fine filtration The grinding fluid after the three-stage precipitation is extracted by a sewage pump (5) through a water extraction pipe and transported to the magnetic filter (302) in the horizontal filter (3) to absorb and remove unprecipitated iron impurities; Then, the grinding fluid flows into the paper filter (301), and the unprecipitated grit impurities are further filtered out by the filter paper; S3, Grinding fluid standing and reprecipitation The filtered grinding fluid flows into the static ring sedimentation tank (6) in the second sedimentation tank (202) for static standing, wherein trace impurities are further accumulated between the static ring sedimentation tank (6) and the bottom of the second sedimentation tank (202); S4. Grinding fluid recycling After being left to stand, the grinding fluid is extracted by a static ring water pump (8) through a grinding fluid suction pipe (9) and transported to the grinding machine for recycling; S5. Fault alarm and handling An ultrasonic level meter (21) and a level alarm (22) are provided above the third-stage sedimentation tank (205). When the sewage pump (5) fails and causes the water level to rise to a set value, the level alarm is triggered to remind the operator to handle the problem in a timely manner. If the static ring water pump (8) fails and causes the liquid level in the second sedimentation tank (202) to rise to the liquid level of the overflow pipe (20), the water will flow back into the third-stage sedimentation tank (205) through the overflow pipe (20) and trigger a liquid level alarm to prompt the operator to handle the problem; When the water level in the first sedimentation tank (201) drops to a set value, the grinding fluid triggers the ultrasonic level meter (21) and the alarm (22) to sound an alarm, and simultaneously activates the solenoid valve (24) on the water supply pipe (23) to automatically supply water; S6. Waste collection and treatment The waste material output ends of the magnetic filter (302) and the paper filter (301) in the horizontal filter (3) are respectively arranged along the length direction and the width direction of the second sedimentation tank (202), and the waste materials are respectively collected in the waste collection pool (19) and the filter paper collection pool (18), thereby realizing automatic packaging of the waste materials; S7. Pool cleaning operation After the grinding fluid has been used for one year or when the pool is cleaned as needed, the running wheel (15) below the sliding paper filter (301) can be moved on the guide rail (14) to open the opening of the second sedimentation box (202), and the internal static ring sedimentation box (6) can be lifted out using a crane or other tool for dumping; at the same time, a submersible pump is placed in the low-level sewage pit (17) to extract the residual sediment in the second sedimentation box (202) for cleaning and replacement.

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