A filtration device for waste cutting fluid

Abstract

The utility model relates to cutting fluid recycling equipment technical field, concretely relates to a kind of filtering device of waste cutting fluid.Filtering device includes filter box, baffle one and two baffles two.Baffle one and two baffles two are sequentially installed in filter box along the length direction of filter box.It is separated into collection cavity, filter cavity one, filter cavity two and filter cavity three by baffle one and two baffles two, and inlet is set in the upper of filter cavity one, one side of filter cavity two is connected with filter cavity one by one of passage two, the other side of filter cavity two is connected with filter cavity three by another passage two, to form W-shaped filter path, the W-shaped filter path formed can increase the filter path of waste cutting fluid in limited space, improve the residence time of waste cutting fluid in filter box in unit time, to facilitate the separation between impurities and cutting fluid in waste cutting fluid, thereby improve the filtering effect of filter box.

Description

Technical Field

[0001] This utility model relates to the technical field of cutting fluid recycling and treatment equipment, specifically to a waste cutting fluid filtration device. Background Technology

[0002] Cutting fluid is a commonly used coolant and lubricant in metal cutting and machining. Its composition varies depending on the application, including oil, oil-water emulsions, pastes, gels, and water. In metal processing or machinery manufacturing, it plays a role in lubrication, cooling, cleaning, and rust prevention during the cutting process. Based on their chemical composition, cutting fluids are divided into two main categories: non-water-soluble (oil-based) fluids and water-soluble (water-based) fluids. Water-based cutting fluids can be further divided into emulsions, semi-synthetic, and fully synthetic cutting fluids. Generally, water-based cutting fluids are made by mixing pure cutting fluid with water. The ratio of cutting fluid to water varies depending on the application and the manufacturer, but cutting fluid typically accounts for 5% to 10%.

[0003] During machine tool processing, cutting fluid easily mixes with suspended matter from the air, metal shavings, and oil stains from the machined parts, causing the cutting fluid to deteriorate easily. Current technologies generally use filtration to remove these impurities from the cutting fluid. However, existing filtration devices are ineffective at filtering waste cutting fluid, resulting in the cutting fluid still containing a significant amount of oil and impurities after passing through the existing filtration system.

[0004] Furthermore, existing filtration devices typically filter cutting fluid using a single filter screen. This method results in a relatively high flow rate, which fails to effectively remove oil and impurities from the cutting fluid, leading to poor filtration efficiency. Moreover, the oil and impurities in the cutting fluid easily clog the filter screen, halting the filtration process. Additionally, this filtration method does not make efficient use of the space within the filtration device, resulting in low filtration efficiency. Utility Model Content

[0005] In order to solve the technical problems of poor filtration effect and easy clogging of the filter screen when filtering cutting fluid through the existing technology, this utility model provides a waste cutting fluid filtration device.

[0006] This utility model adopts the following technical solution: a waste cutting fluid filtration device, which includes a filter box, a baffle one, and two baffles two. The baffle one and the two baffles two are sequentially installed inside the filter box along its length, dividing the filter box into independent collection chambers, filter chamber one, filter chamber two, and filter chamber three. The bottom of baffle one is installed on the bottom plate of the filter box, and a channel one is provided between its top and the top plate of the filter box. The top of baffle two is installed on the top plate of the filter box, and a channel two is provided between its bottom and the bottom plate of the filter box. A liquid inlet is provided at the upper end of filter chamber one. Waste cutting fluid flows into filter chamber one from the liquid inlet pipe and passes through the channel two on its right side into filter chamber two. The waste cutting fluid in filter chamber two enters filter chamber three from the channel two on its right side, forming a W-shaped filtration path for the waste cutting fluid within the filter box. The outlet of filter chamber three is connected to the inlet of the collection chamber, and the floating oil in the collection chamber can overflow back into filter chamber one through channel one. Both baffle one and baffle two are formed by bending multiple plate segments, and their structures are different. Baffle one, baffle two, and the filter box together form a filter chamber one with a cross-section of two oppositely arranged trumpet-shaped structures, and the two trumpet openings are interconnected. The diameter of the filter box and the two baffle two can form a filter chamber two with a cross-section of a V-shaped structure in the middle and vertical structures at both ends.

[0007] As a further improvement of this utility model, the bottom of the filter box is also provided with two drain ports. One drain port is located below the second baffle on the left side and is connected to the first filter chamber and the second filter chamber respectively. The other drain port is located below the second baffle on the right side and is connected to the second filter chamber and the third filter chamber respectively.

[0008] In a typical embodiment of this utility model, each drain outlet extends downward to form a drain bucket; the drain bucket is a hollow inverted cone structure.

[0009] As a further improvement of this utility model, a three-way pipe is installed at the bottom of the sewage tank. The first end of the three-way pipe is connected to the liquid outlet at the bottom of the sewage tank, and the second end of the three-way pipe is connected to the first filter chamber through a pipe. A return valve and a return pump are installed on the pipe. The return valve is used to control the opening or closing of the second end of the three-way pipe, and the return pump is used to transport the liquid in the sewage tank back to the first filter chamber after the return valve is opened. A drain valve is provided at the third end of the three-way pipe, which is used to drain the liquid in the sewage tank.

[0010] As a further improvement of this utility model, an overflow baffle is also installed in the second filter chamber and the overflow baffle is located between the two drain buckets. The lower end of the overflow baffle is fixed to the bottom plate and its upper end is inclined towards the second filter chamber. The height of the overflow baffle is greater than the width of the second channel. The overflow baffle is used to prevent the waste cutting fluid at the bottom of the second filter chamber from overflowing back into the first filter chamber.

[0011] An overflow baffle 2 is also installed inside the filter chamber 1. The upper end of the overflow baffle 2 is fixed to the top plate and its lower end is inclined towards the filter chamber 1. The length of the overflow baffle 2 is greater than the width of the channel 1, so that the floating oil in the collection chamber can overflow back into the filter chamber 1 through the channel 1.

[0012] As a further improvement of this utility model, the waste cutting fluid filtration device also includes a filter pump, which is used to transport the filtrate in the filter chamber three to the collection chamber.

[0013] In a further embodiment of this utility model, the baffle includes a first inclined plate segment, a first vertical plate segment, a second inclined plate segment, and a third inclined plate segment; one end of the first inclined plate segment is fixedly installed on the base plate and the other end is inclined toward the collection cavity; the lower end of the second inclined plate segment is connected to the first inclined plate segment and its upper end is inclined toward the filter cavity; the lower end of the first vertical plate segment is connected to the upper end of the second inclined plate segment and its upper end is connected to the third inclined plate segment; the third inclined plate segment is inclined toward the filter cavity.

[0014] In a further embodiment of this utility model, the baffle two includes a second vertical plate segment, a fourth inclined plate segment, a fifth inclined plate segment, and a third vertical plate segment. The upper end of the second vertical plate segment is fixedly installed on the top plate. One end of the fourth inclined plate segment is fixed to the lower end of the second vertical plate segment, and the other end is inclined towards the filter cavity two. The upper end of the fifth inclined plate segment is connected to the lower end of the fourth inclined plate segment, and the lower end of the fifth inclined plate segment is inclined towards the filter cavity one. The upper end of the third vertical plate segment is fixedly connected to the lower end of the fourth inclined plate segment.

[0015] As a further improvement of this utility model, at least two filter cylinders are installed inside the filter chamber three, and the two filter cylinders are installed side by side in the filter chamber three along the width direction of the filter box.

[0016] The technical solution provided by this utility model has the following beneficial effects:

[0017] (1) This utility model provides a waste cutting fluid filtration device, which divides the filter box into a collection chamber, a filter chamber 1, a filter chamber 2 and a filter chamber 3 by a baffle 1 and two baffles 2. The inlet is located above the filter chamber 1. One side of the filter chamber 2 is connected to the filter chamber 1 through one of the channels 2, and the other side of the filter chamber 2 is connected to the filter chamber 3 through another channel 2, so as to form a W-shaped filtration path. The W-shaped filtration path can increase the filtration path of the waste cutting fluid in a limited space and increase the residence time of the waste cutting fluid in the filter box per unit time, thereby facilitating the separation of impurities in the waste cutting fluid from the cutting fluid, thereby improving the filtration effect of the filter box.

[0018] (2) This utility model provides a waste cutting fluid filtration device, in which both baffle one and baffle two are multi-segmented bent plates, and the bending points of baffle one and baffle two in filter chamber one are not on the same horizontal plane, so that the waste cutting fluid at different positions in filter chamber one will generate a Karman vortex street phenomenon. That is, as the liquid level rises in the waste cutting fluid entering filter chamber one, a Karman vortex street phenomenon can be generated at different bending points, so that the waste cutting fluid entering filter chamber one can generate a Karman vortex street phenomenon in filter chamber one. That is, when the liquid in filter chamber one passes through the bending point of baffle one or baffle two, small vortices are generated. The generated small vortices will accelerate the collision between the fine oil droplets in the waste cutting fluid, thereby increasing the probability that multiple fine oil droplets will gather together to form large oil droplets. The formed large oil droplets will more easily float to the liquid surface, thereby achieving the separation of oil droplets in waste cutting fluid.

[0019] (3) The waste cutting fluid filtration device provided by this utility model consists of two opposing funnel-shaped filter chambers. The opposing funnel-shaped structure can increase the capacity of the filter chambers, and the gradually narrowing funnel shape at the bottom also facilitates the falling of heavy impurity particles in the waste cutting fluid along the baffles and the drain tank below. Therefore, in this embodiment, by setting the filter chambers, heavy impurities in the waste cutting fluid can settle to the bottom under gravity and enter the drain tank through the drain outlet, while low-density oil droplets can aggregate into large oil droplets under the action of the Karman vortex street phenomenon and float to the surface of the liquid. This achieves the purpose of simultaneously removing heavy impurity particles and oil stains from the waste cutting fluid, thereby improving the separation effect of the waste cutting fluid. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the waste cutting fluid filtration device provided in this utility model.

[0021] Figure 2 This is a schematic diagram of the structure of the waste cutting fluid filtration device of the present invention, in which baffle one and baffle two separate the waste cutting fluid into different cavities.

[0022] Figure 3 This is a magnified structural diagram of baffle one and baffle two in this utility model.

[0023] Figure 4 A schematic diagram of the internal structure of the waste cutting fluid filtration device provided by this utility model (the left and right side plates and the front side plate of the filter box are not shown).

[0024] Figure 5 A schematic diagram of the internal structure of the waste cutting fluid filtration device provided by this utility model from another angle (the left and right side plates and the front side plate of the filter box are not shown).

[0025] The diagram is labeled as follows: 1. Filter box; 11. Collection chamber; 12. Filter chamber one; 121. Liquid inlet; 122. Overflow baffle two; 123. Fifth vertical plate section; 124. Seventh inclined plate section; 13. Filter chamber two; 131. Overflow baffle one; 132. Fourth vertical plate section; 133. Sixth inclined plate section; 14. Filter chamber three; 141. Filter cylinder; 15. Top plate; 16. Bottom plate; 2. Baffle one; 21. First inclined plate section; 22. First vertical plate section; 23. Second inclined plate section; 24. Third inclined plate section; 3. Baffle two; 31. Second vertical plate section; 32. Fourth inclined plate section; 33. Fifth inclined plate section; 34. Third vertical plate section; 4. Drain outlet; 41. Drain bucket. Detailed Implementation

[0026] The present invention will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0027] In the description of this utility model, it should be noted that directional terms such as "center," "lateral," "longitudinal," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating directions and positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are used only for the convenience of describing this utility model 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, and should not be construed as limiting the specific protection scope of this utility model. The terms "first," "second," etc., in the specification and claims of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. The terms "comprising" and "having," and any variations thereof, in the specification and claims of this utility model, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products, or devices.

[0028] This embodiment provides a waste cutting fluid filtration device; please refer to [reference needed]. Figures 1 to 4The system includes a filter box 1, an inlet valve, an outlet valve, a drain valve, and a filter pump. The filter box 1 can be rectangular. Inside the filter box 1, along its length, are arranged two baffles 2 and two baffles 3. The bottom of baffle 2 is fixedly installed on the bottom plate 16 of the filter box 1, and the front and rear sides of baffle 2 are connected to the front and rear side plates of the filter box 1, respectively. A gap is provided between the top of baffle 2 and the top plate 15 of the filter box 1 to form a channel 1 connecting the collection chamber 11 and the first filter chamber 12. The collection chamber 11 is formed by baffle 2 and the left side of the filter box 1, and the upper end of the collection chamber 11 can be connected to the first filter chamber 12 through the channel 1. The top of baffle 3 is fixed to the top plate 15 of the filter box 1, and the front and rear sides of baffle 3 are connected to the front and rear side plates of the filter box 1, respectively. A gap is provided between the bottom of baffle 3 and the bottom plate 16 of the filter box 1 to form a channel 2 connecting the second filter chamber 13 and the third filter chamber 14. The baffle 1 (2), baffle 2 (3), and filter box 1 together form filter chamber 12; the two baffles 2 (3) together form filter chamber 2 (13); and the right baffle 2 (3) and the right side of filter box 1 together form filter chamber 3 (14). By setting baffle 1 (2) and the two baffles 2 (3), filter box 1 can be divided along its length into collection chamber 11, filter chamber 12, filter chamber 2 (13), and filter chamber 3 (14). Filter chamber 12 has an inlet 121 at its upper end, and filter chamber 3 (14) has an outlet at its bottom. The outlet of filter chamber 3 (14) is connected to the inlet 121 of collection chamber 11. A filter pump is used to transport the filtrate in filter chamber 3 (14) to collection chamber 11. In actual use, the waste cutting fluid to be treated can enter filter chamber 12 from inlet 121, and then flow sequentially from filter chamber 12 into filter chamber 2 (13) and filter chamber 3 (14), thus forming a W-shaped filtration path within filter box 1. The W-shaped filtration path increases the filtration path of the waste cutting fluid within a limited space, thereby increasing the residence time of the waste cutting fluid in the filter box 1 per unit time. This facilitates the separation of impurities in the waste cutting fluid from the cutting fluid, thus improving the filtration effect of the filter box 1.

[0029] Please refer to Figures 3 to 5Both baffle 1 (2) and baffle 2 (3) can be formed by bending multiple plate segments with different structures. Baffle 1 (2) may include a first inclined plate segment 21, a first vertical plate segment 22, a second inclined plate segment 23, and a third inclined plate segment 24. The bottom of the first inclined plate segment 21 is fixedly installed on the base plate 16, and the other end of the first inclined plate segment 21 is inclined towards the collection chamber 11. The lower end of the second inclined plate segment 23 is connected to the upper end of the first inclined plate segment 21, and the upper end of the second inclined plate segment 23 is inclined towards the filter chamber 12, so that the first inclined plate segment 21 and the second inclined plate segment 23 form a V-shaped structure with the opening facing the filter chamber 12. This V-shaped structure results in multiple bends in the filter chamber 12, which causes the waste cutting fluid entering the filter chamber 2 (13) to generate a Karman vortex street phenomenon when passing through the bends in the filter chamber 2 (13), thereby further accelerating the separation speed of oil droplets and cutting fluid in the waste cutting fluid, and improving the separation effect of waste cutting fluid in the filter chamber 2 (13). The lower end of the first vertical plate segment 22 is connected to the upper end of the second inclined plate segment 23. The upper end of the first vertical plate segment 22 is connected to the lower end of the third inclined plate segment 24. The upper end of the third inclined plate segment 24 is inclined towards the filter chamber 12. The baffle 2 3 may include the second vertical plate segment 31, the fourth inclined plate segment 32, the fifth inclined plate segment 33, and the third vertical plate segment 34. The upper end of the second vertical plate segment 31 is fixedly installed on the top plate 15 of the filter box 1. The upper end of the fourth inclined plate segment 32 is fixedly connected to the lower end of the second vertical plate segment 31. The lower end of the fourth inclined plate segment 32 is inclined towards the filter chamber 13. The upper end of the fifth inclined plate segment 33 is fixed below the fourth inclined plate segment 32. The lower end of the fifth inclined plate segment 33 is inclined towards the filter chamber 12. The upper end of the third vertical plate segment 34 is fixedly connected to the lower end of the fifth inclined plate segment 33. The angle between the fifth inclined plate segment 33 and the vertical direction is the same as the angle between the fourth inclined plate segment 32 and the vertical direction. Baffle 1 2 and Baffle 2 3 can form two opposing funnel-shaped filter chambers 12, with the two funnel openings interconnected. It is understood that in this embodiment, the bends of Baffle 1 2 and Baffle 2 3 at the filter chamber 12 are not on the same horizontal plane, causing the waste cutting fluid at different locations within the filter chamber 12 to generate a Karman vortex street phenomenon. That is, as the liquid level rises, the waste cutting fluid entering the filter chamber 12 can generate a Karman vortex street phenomenon at different bends, allowing the waste cutting fluid entering the filter chamber 12 to generate a Karman vortex street phenomenon within the filter chamber 12. This means that when the liquid in the filter chamber 12 passes through the bend of Baffle 1 2 or Baffle 2 3, small vortices are generated. These small vortices accelerate the collision of fine oil droplets in the waste cutting fluid, thereby increasing the probability of multiple fine oil droplets agglomerating together to form large oil droplets. The large oil droplets formed will float to the surface more easily, thus achieving the separation of oil droplets from waste cutting fluid.By forming two opposing, funnel-shaped filter chambers 12, the opposing funnel-shaped structure can increase the capacity of the filter chambers 12, while the gradually narrowing funnel shape at the bottom also facilitates the falling of heavy impurity particles in the waste cutting fluid along the baffles 2 and 3 into the drain tank 41 below. Therefore, in this embodiment, by setting the filter chambers 12, heavy impurities in the waste cutting fluid can settle to the bottom under gravity and enter the drain tank 41 through the drain port 4, while low-density oil droplets can aggregate into large oil droplets under the action of the Karman vortex street phenomenon and float to the surface of the liquid. This achieves the purpose of simultaneously removing heavy impurity particles and oil stains from the waste cutting fluid, improving the separation effect of the waste cutting fluid. The two baffles 3 and the filter box 1 can form a filter chamber 13 with a V-shaped cross-section in the middle and vertical structures at both ends. The filter chamber 2 13, formed by two baffles 2 3, not only extends the filtration path of the filter chamber 2 13 but also causes a Karman vortex street phenomenon to occur in the waste cutting fluid when it passes through the bend. That is, small vortices are formed at the bend, which can increase the probability of collision between small oil droplets in the waste cutting fluid. This makes it easier for the small oil droplets in the waste cutting fluid to aggregate into larger oil droplets. The aggregated large oil droplets can float to the surface, thereby achieving the purpose of separating the small oil droplets from the cutting fluid in the waste cutting fluid.

[0030] Please refer to Figure 4 The drain outlet 4 extends downwards integrally to form a drain bucket 41, which is used to hold the impurities that settle inside the filter box 1. The drain bucket 41 can be a hollow inverted cone structure. The inverted cone structure facilitates the settling of impurities at the bottom of the filter box 1 along its inner wall to the bottom of the drain bucket 41, which is convenient for separating cutting fluid and other impurity particles inside the filter box 1. There can be two drain outlets 4, and the two drain outlets 4 also extend downwards to form drain buckets 41 respectively. A three-way pipe can also be installed at the bottom of each drain bucket 41. One pipe of the three-way pipe is connected to the bottom of the drain bucket 41, a drain valve is installed on one outlet pipe of the three-way pipe, and the other outlet pipe of the three-way pipe can be connected to the filter chamber 12, and a return pump is also installed on the outlet pipe. The return pump is used to transport the liquid in the filter box 1 back to the filter chamber 12. Finally, when the liquid level in filter chamber 2 13 drops to the minimum reflux level, the reflux pump can be manually turned off and the drain valve opened until the drain tank 41 is emptied. Then the drain valve is closed, and the inlet valve is opened again until the liquid level in filter chamber 2 13 rises to the minimum filtration level. After a specified time, the filter pump is then started to perform the next filtration cycle.

[0031] Please refer to Figure 4 and Figure 5There can be two drain tanks 41. One drain tank 41 is located below the left baffle 2 3 and is connected to both filter chamber 1 12 and filter chamber 2 13. The other drain tank 41 is located below the right baffle 2 3 and is connected to both filter chamber 2 13 and filter chamber 3 14. Specifically, when waste cutting fluid enters filter chamber 1 12 from the inlet 121, heavier impurities in the waste cutting fluid can be separated from the cutting fluid in filter chamber 1 12, allowing the heavier impurities to enter drain tank 41 through drain outlet 4. At the same time, some impurities will enter filter chamber 2 13 through channel 2 on the right side of filter chamber 1 12. The waste cutting fluid entering filter chamber 2 13 can undergo a second sedimentation separation in filter chamber 2 13. Heavier impurities in filter chamber 2 13 can enter drain tank 41 through drain outlet 4. Meanwhile, the waste cutting fluid in filter chamber 2 13 can enter filter chamber 3 14 through channel 2 on its right side, due to the principle of communicating vessels. By setting up two drain tanks 41, the impurities precipitated in filter chamber 12, filter chamber 2 13 and filter chamber 3 14 can be collected, thereby achieving the purpose of separating impurities in waste cutting fluid.

[0032] Please refer to Figure 4 and Figure 5 An overflow baffle 2131 can also be installed inside the second filter chamber 13, located between the two drain tanks 41. The lower end of the overflow baffle 2131 is fixed to the base plate 16, and its upper end is inclined towards the second filter chamber 13. This inclination guides the waste cutting fluid entering the second filter chamber 13 and buffers its flow rate, allowing the waste cutting fluid in the first filter chamber 12 to slowly enter the second filter chamber 13. This slower flow rate facilitates the separation of substances of different densities within the waste cutting fluid, thus achieving the purpose of filtering and separating the waste cutting fluid and improving its separation effect. The height of the overflow baffle 2131 is greater than the width of the second channel. By setting the overflow baffle 2131, the accumulation of heavier substances in the second filter chamber 13 can be effectively prevented from clogging the second channel.

[0033] Please refer to Figure 5The ball valve overflow baffle 2131 may include a fourth vertical plate section 132 and a sixth inclined plate section 133. The fourth vertical plate section 132 is fixedly installed on the bottom plate 16 of the filter box 1. The lower end of the sixth inclined plate section 133 is fixed to the upper end of the fourth vertical plate section 132, and the upper end of the sixth inclined plate section 133 is inclined to the upper right. The fourth vertical plate section 132 is arranged parallel to the third vertical plate section 34, so that the waste cutting fluid in the first filter chamber 12 can enter the third filter chamber 14 through the second channel and then along the sixth inclined plate section 133. In this embodiment, by setting the fourth vertical plate section 132 and the sixth inclined plate section 133, not only can the waste cutting fluid in the first filter chamber 12 be guided when it enters the second filter chamber 13 through the second channel, but the waste cutting fluid entering the second filter chamber 13 can also be decelerated. The purpose of deceleration is to facilitate the rapid separation of impurities of different densities in the waste cutting fluid entering the second filter chamber 13, thereby improving the separation effect of impurities in the waste cutting fluid.

[0034] Please refer to Figure 4 and Figure 5 An overflow baffle 122 is also installed inside the filter chamber 12. The upper end of the overflow baffle 122 is fixed to the top plate 15, and its lower end is inclined towards the filter chamber 12. The length of the overflow baffle 122 is greater than the width of the channel 1. The overflow baffle 122 may include a fifth vertical plate segment 123 and a seventh inclined plate segment 124. The upper end of the fifth vertical plate segment 123 is fixedly installed on the top plate 15, and the upper end of the seventh inclined plate segment 124 is fixedly installed at the lower end of the seventh inclined plate segment 124, with the lower end of the seventh inclined plate segment 124 inclined to the lower left. The seventh inclined plate segment 124 and the third inclined plate segment 24 are arranged in parallel. The purpose of the parallel arrangement is to guide and buffer the liquid overflowing from the collection chamber 11 back to the filter chamber 12 through the channel 1. This allows the liquid at the top of the collection chamber 11 to flow back into the filter chamber 12 from the channel 1 above the third inclined plate segment 24 along the guide channel formed by the seventh inclined plate segment 124 and the third inclined plate segment 24, thereby achieving the purpose of re-filtering the liquid at the top of the collection chamber 11.

[0035] At least two filter cartridges 141 are installed inside filter chamber 3 14. Please refer to [reference needed]. Figure 4Two filter cartridges 141 are arranged side-by-side along the width of the filter chamber 1. In practical applications, the two filter cartridges 141 can be controlled to alternately filter and backwash using a system-set time. For example, when one filter pump drives the filter cartridge 141 connected to it for filtration, the other filter pump can be simultaneously controlled to stop filtration and backwash the filter cartridge 141. When the system-set time is reached, the filter pump that is currently filtering can be controlled to stop filtration and start the backwashing operation of the filter cartridge 141. At the same time, the backwashing operation of the other filter cartridge 141 is turned off and its filter pump is started for filtration. Through the above operation, the two filter cartridges 141 can be alternately filtered and backwashed, so that continuous filtration can be achieved in the filter chamber 14.

[0036] The inlet valve is installed at the inlet 121 and is used to control the opening and closing of the inlet 121. A drain port 4 is located at the bottom of the filter box 1, and a drain valve is installed at the drain port 4 to control its opening and closing. An outlet port is located at the bottom of the filter chamber 14, and an outlet valve is installed at the outlet to control its opening and closing. A filter pump is used to transport the filtrate from the filter chamber 14 to the collection chamber 11 when the outlet valve is open. The inlet valve, outlet valve, and drain valve can all be opened or closed manually.

[0037] In this embodiment, the filter box 1 can use the following two filtration modes when filtering waste cutting fluid: (i) continuous inlet and continuous outlet filtration mode; (ii) batch inlet and continuous outlet filtration mode. Specifically, different filtration modes can be selected in the following ways. If the purity of the waste cutting fluid to be processed is less than the set purity threshold, the filter device can use the continuous inlet and continuous outlet mode. In this mode, the entire filtration process is continuous, and liquid is continuously supplied to the filter device, while the filter pump also continuously supplies filtered liquid to the collection chamber 11. The program will only stop when sewage discharge is required, all waste cutting fluid has been filtered, or other abnormalities occur during the filtration process. If the purity of the waste cutting fluid to be processed is greater than the set purity threshold, the filter device can use the batch inlet and continuous outlet mode. In this mode, an inlet volume is first set, and the filter device starts the filtration operation when the inlet volume in the filter box 1 reaches the inlet volume threshold set by the system, and the sewage discharge operation is started when sewage discharge is required. Understandably, the purity threshold can be set according to the actual processing needs.

[0038] The filter chamber 2 (13) is equipped with float switch 1, float switch 2, and float switch 3. Float switch 1 is installed at the lowest reflux level of filter chamber 2 (13), float switch 2 is installed at the lowest filtration level of filter chamber 2 (13), and float switch 3 is installed at the highest filtration level of filter chamber 2 (13). In actual use, the filtration mode of filter box 1 needs to be determined first. Based on the determined filtration mode, different valves are controlled to open and close to control filter box 1 for filtration or wastewater discharge. The following describes the different operating steps of filter box 1 when treating waste cutting fluid using two different filtration modes.

[0039] If filter box 1 adopts a continuous inlet and continuous outlet filtration mode, the waste cutting fluid to be treated can first be delivered to filter chamber 12 by manually opening the inlet valve and closing both the inlet and outlet valves. The liquid level in filter chamber 2 (13) is then observed until it reaches the float switch. After waiting 5-10 minutes, the outlet valve and filter pump are opened. The filter pump filters the waste cutting fluid in filter chamber 3 (14) through filter cartridge 141 and delivers the filtered waste cutting fluid to collection chamber 11 for unified collection. The liquid level in filter chamber 2 (13) is then continuously observed. If the liquid level in filter chamber 2 (13) drops to the minimum filtration level, the outlet valve and filter pump are manually closed, and the outlet valve is opened for 5-10 seconds. At this time, the sediment at the bottom of the drain tank 41 can be directly discharged through the outlet valve. After the drain valve has been open for the time set by the system, it can be manually closed and the return pump turned on until the liquid level in filter chamber 3 (14) drops to the minimum return level, at which point the return valve is closed. At this time, some liquid in filter chamber 2 (13) can be pumped back to filter chamber 1 (12) via the return pump, allowing for re-filtration and recycling of some liquid in filter chamber 2 (13). This setup effectively reduces the amount of wastewater directly discharged from drain tank 41, improving the efficiency of waste cutting fluid reuse. The advantage of this setup is that the wastewater discharged through the drain valve in this process has a high purity of impurities, requiring companies to spend significant sums on harmless treatment before releasing it into the environment. Therefore, by installing a return pump below drain tank 41, this solution reduces the amount of wastewater directly discharged through the drain valve through multiple cyclic filtration processes, improving the utilization rate of waste cutting fluid and reducing the company's expenses on wastewater treatment. When the liquid level in filter chamber 2 (13) drops to the minimum reflux level, the controller shuts off the reflux pump and opens the drain valve. At this time, the waste liquid in the drain tank 41 can be completely drained through the drain valve, thus achieving filtration and drainage of the waste cutting fluid. After the drainage operation is completed, the drain valve can be manually closed and the inlet valve opened. The waste cutting fluid to be treated can enter filter chamber 1 (12) through inlet 121 until the liquid level in filter chamber 2 (13) reaches the maximum filtration level, at which point the inlet stops and the next filtration cycle begins. By repeating the above operation, waste cutting fluid can be filtered through a batch inlet and continuous outlet method.

[0040] If filter box 1 is used to treat waste cutting fluid using a batch inlet and continuous outlet method, the operation steps are as follows: First, manually open the inlet valve and close the outlet valve and drain valve. The waste cutting fluid to be treated enters filter chamber 12 through inlet 121 and then flows into filter chamber 23 along channel 2 on the right side of filter chamber 12. Simultaneously, according to the principle of communicating vessels, the liquid in filter chamber 23 also flows into filter chamber 34 along channel 2 on its right side. As the inlet continues, the liquid level in filter box 1 will first rise from the bottom of drain tank 41 to the lowest reflux level, and then rise from the lowest reflux level to the lowest filtration level. When the liquid level in filter chamber 23 is observed to rise to the highest filtration level, close the inlet valve and open the filter pump and outlet valve to begin filtration. As the filtration process continues, the liquid level in filter chamber 23 will gradually decrease until it reaches the lowest filtration level. Then, close the outlet valve and filter pump, and start the drain procedure. In the wastewater discharge procedure: First, the drain valve can be opened for 5-30 seconds, during which time the sediment at the bottom of the wastewater tank 41 can be directly discharged through the drain valve. After the system-set time has elapsed, the drain valve is closed and the return pump is turned on until the liquid level in filter chamber 3 14 drops to the minimum return liquid level, at which point the return valve is closed. At this time, some of the liquid in filter chamber 2 13 can be pumped back to filter chamber 1 12 through the return pump, realizing the re-filtration and recycling of some of the liquid in filter chamber 2 13. This setting can effectively reduce the amount of wastewater directly discharged from the wastewater tank 41 and improve the reuse efficiency of waste cutting fluid. The advantage of this setting is that the purity of the impurities in the wastewater discharged through the drain valve in this process is relatively high, which requires the company to spend more money on the harmless treatment of this wastewater before it can be discharged into the environment. Therefore, by installing a reflux pump below the drain tank 41 in this solution, the amount of waste liquid directly discharged through the drain valve can be reduced through multiple circulation filtration. This not only improves the utilization rate of waste cutting fluid but also reduces the company's expenses for treating waste liquid discharged from the drain valve. When the liquid level in filter chamber 2 13 drops to the minimum reflux level, the reflux pump can be manually shut off and the drain valve opened. At this time, the waste liquid in drain tank 41 can be completely emptied through the drain valve, thereby achieving filtration and discharge of waste cutting fluid. After the discharge operation is completed, the controller can close the drain valve and open the inlet valve. The waste cutting fluid to be treated can enter filter chamber 1 12 through inlet 121 until the liquid level in filter chamber 2 13 reaches the maximum filtration level, at which point the inlet stops and the next filtration cycle begins. By repeating the above operation, waste cutting fluid can be filtered through a sequential batch inlet and continuous outlet method.

[0041] It is understood that, in this embodiment, some known control logic from the prior art can also be used, and a controller can be added to achieve the purpose of automatic control of the entire filtration device. At this time, a level gauge and a flow meter can also be added to the filtration device. The level gauge is installed in the second filter chamber 13 and is used to detect the liquid level in the second filter chamber 13. The controller is electrically connected to the inlet valve, outlet valve, drain valve, filter pump, level gauge, and flow meter. The controller can execute various operations according to the following logic: The controller is used to open the inlet valve and close the outlet valve and drain valve when liquid enters the filter box 1. At this time, the waste cutting fluid to be treated can enter the first filter chamber 12 through the inlet 121. In this embodiment, by electrically connecting the level gauge to the controller, the level gauge can transmit the detected liquid level value in the second filter chamber 13 to the controller. The controller compares the liquid level value input by the level gauge with the liquid level threshold set by the system and makes different decisions based on the comparison result. Specifically, the controller can also acquire the liquid level value of the level gauge and start the filter pump and open the outlet valve when the liquid level rises to the system's set minimum filtration level after a specified time, at which point filter tank 1 can perform filtration operations. The controller can also shut down the filter pump and outlet valve and open the drain valve when the liquid level drops to the system's set minimum filtration level, at which point filter tank 1 can perform drain operations. The controller can also close the inlet valve when the liquid level reaches the system's set maximum filtration level. The controller can also acquire the flow rate value of the flow meter and close the inlet valve when the flow rate is less than the system's set flow rate value. In this solution, the controller does not involve improvements to the control logic; its internal control logic can use known judgment logic from existing technologies to control various operations. Therefore, the main purpose of adding the controller in this solution is to achieve automated control of the filtration device, thereby improving its practicality.

[0042] The basic principles, main features, and advantages of this utility model have been described above. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A waste cutting fluid filtration device, characterized in that, It includes a filter box, a first baffle, and two second baffles. The first baffle and the two second baffles are installed sequentially along the length of the filter box and are used to divide the filter box into independent collection chambers, filter chamber one, filter chamber two, and filter chamber three. The bottom of the first baffle is installed on the bottom plate of the filter box, and a channel one is provided between its top and the top plate of the filter box. The top of the second baffle is installed on the top plate of the filter box, and a channel two is provided between its bottom and the bottom plate of the filter box. The upper end of the first filter chamber has a liquid inlet. Waste cutting fluid flows into the first filter chamber from the liquid inlet and passes through the channel two on its right side into the second filter chamber. The waste cutting fluid in the second filter chamber enters the third filter chamber from the channel two on its right side, so that the waste cutting fluid forms a W-shaped filtration path in the filter box. The outlet of the third filter chamber is connected to the inlet of the collection chamber, and the floating oil in the collection chamber can overflow back into the first filter chamber through the channel one. Both baffle one and baffle two are made of multiple bent plates with different structures. The baffle one, baffle two and the filter box together form a filter chamber one with a cross-section of two oppositely arranged trumpet-shaped structures, and the two trumpet openings are connected to each other. The filter box and the two baffle two can form a filter chamber two with a cross-section of V-shaped structure in the middle and vertical structure at both ends.

2. The waste cutting fluid filtration device as described in claim 1, characterized in that: The bottom of the filter box is also provided with two drain ports. One of the drain ports is located below the second baffle on the left and is connected to the first filter chamber and the second filter chamber respectively. The other drain port is located below the second baffle on the right and is connected to the second filter chamber and the third filter chamber respectively.

3. The waste cutting fluid filtration device as described in claim 2, characterized in that: Each of the aforementioned drain outlets extends downwards to form a drain bucket; the drain bucket is a hollow inverted cone structure.

4. The waste cutting fluid filtration device as described in claim 3, characterized in that: A three-way pipe is installed at the bottom of the sewage tank. The first end of the three-way pipe is connected to the liquid outlet at the bottom of the sewage tank, and the second end of the three-way pipe is connected to the first filter chamber through a pipe. A reflux valve and a reflux pump are installed on the pipe. The reflux valve is used to control the opening or closing of the second end of the three-way pipe, and the reflux pump is used to transport the liquid in the sewage tank back to the first filter chamber after the reflux valve is opened. A sewage discharge valve is provided at the third end of the three-way pipe, and the sewage discharge valve is used to discharge the liquid in the sewage tank.

5. The waste cutting fluid filtration device as described in claim 3, characterized in that: An overflow baffle is also installed inside the second filter chamber, and the overflow baffle is located between the two drain buckets. The lower end of the overflow baffle is fixed to the bottom plate and its upper end is inclined towards the second filter chamber. The height of the overflow baffle is greater than the width of the second channel. The overflow baffle is used to prevent the waste cutting fluid at the bottom of the second filter chamber from overflowing back into the first filter chamber.

6. The waste cutting fluid filtration device as described in claim 1, characterized in that: An overflow baffle 2 is also installed inside the filter chamber 1. The upper end of the overflow baffle 2 is fixed to the top plate and its lower end is inclined towards the filter chamber 1. The length of the overflow baffle 2 is greater than the width of the channel 1. The floating oil in the collection chamber can overflow back into the filter chamber 1 through the channel 1.

7. The waste cutting fluid filtration device as described in claim 1, characterized in that: The waste cutting fluid filtration device also includes a filtration pump, which is used to transport the filtrate in the filtration chamber three to the collection chamber.

8. The waste cutting fluid filtration device as described in claim 1, characterized in that: The baffle includes a first inclined plate segment, a first vertical plate segment, a second inclined plate segment, and a third inclined plate segment; one end of the first inclined plate segment is fixedly installed on the base plate and the other end is inclined toward the collection cavity; the lower end of the second inclined plate segment is connected to the first inclined plate segment and its upper end is inclined toward the filter cavity; the lower end of the first vertical plate segment is connected to the upper end of the second inclined plate segment and its upper end is connected to the third inclined plate segment; the third inclined plate segment is inclined toward the filter cavity.

9. The waste cutting fluid filtration device as described in claim 1, characterized in that: The second baffle includes a second vertical plate segment, a fourth inclined plate segment, a fifth inclined plate segment, and a third vertical plate segment. The upper end of the second vertical plate segment is fixedly installed on the top plate. One end of the fourth inclined plate segment is fixed to the lower end of the second vertical plate segment, and the other end is inclined towards the second filter cavity. The upper end of the fifth inclined plate segment is connected to the lower end of the fourth inclined plate segment, and the lower end of the fifth inclined plate segment is inclined towards the first filter cavity. The upper end of the third vertical plate segment is fixedly connected to the lower end of the fourth inclined plate segment.

10. The waste cutting fluid filtration device as described in claim 1, characterized in that: At least two filter cylinders are installed inside the filter chamber three, and the two filter cylinders are installed side by side in the filter chamber three along the width direction of the filter box.

Images