Filter device applied to water circulation system of wire cutting machine and cutting fluid circulation system

Abstract

The embodiment of the utility model provides a filtering device applied to a water circulation system of a wire cutting machine and a cutting fluid circulation system, the filtering device comprises a tank body and a precipitation device arranged in the tank body, and the precipitation device is provided with an inclined surface; a liquid inlet channel is arranged in the tank body and extends downwards to be lower than the precipitation device; a liquid outlet is further formed in the side wall of the tank body; an impurity outlet is further formed in the bottom of the tank body. According to the filtering device applied to the water circulation system of the wire cutting machine and the cutting fluid circulation system provided by the embodiment of the invention, liquid can be filtered through the precipitation device, impurities in the liquid are attached to the precipitation device and fall off to be discharged from the impurity discharging opening, supernatant liquid is discharged from the fluid discharging opening, and the cutting fluid is filtered.

Description

Technical Field

[0001] This application relates to liquid filtration technology, and more particularly to a filter device and a cutting fluid circulation system applied to the water circulation system of a wire EDM machine. Background Technology

[0002] Solar power generation technology is one of the fastest-growing and most dynamic research fields in recent years. Crystalline silicon cells are one of the important components of solar panels, and their quality is crucial. Typically, a slicing machine is used to slice a square rod to obtain silicon wafers, which are then diced into smaller wafers using a dicing machine to manufacture crystalline silicon cells.

[0003] During the slicing process, the slicing machine uses a cutting line for cutting and sprays cutting fluid onto the cutting area for cooling and also washes away the silicon powder adhering to the cutting line, thereby reducing the amount of silicon powder adhering to the silicon surface and improving the silicon surface quality.

[0004] Taking a slicing machine as an example, a square rod is bonded to a resin plate, and the feeding mechanism is connected to the resin plate, driving the resin plate to move and causing the square rod to move along the feeding direction for slicing. After slicing, the silicon wafer needs to be debonded and cleaned to remove the resin glue or resin plate adhering to the surface of the silicon wafer. However, in actual production, some resin glue or resin plate remains and cannot be completely cleaned. A small amount of resin residue is generated from each cut, and the resin residue generated from multiple cuts adsorbs together to form flocculent matter, which can easily cause pipeline blockage, resulting in obstructed flow of cutting fluid and thus affecting cutting cooling. Moreover, if the clumps of flocculent matter flow with the cutting fluid, they can easily adhere to the cutting wire, causing the cutting wire to skip, get stuck, or even break, which can easily cause major production problems, not only increasing production costs but also affecting production cycle time and reducing production efficiency. Summary of the Invention

[0005] To address one of the aforementioned technical deficiencies, this application provides a filter element and a cutting fluid circulation system for use in the water circulation system of a wire EDM machine.

[0006] According to a first aspect of the embodiments of this application, a filter device for use in a water circulation system of a wire cutting machine is provided, comprising: a tank and a sedimentation device disposed in the tank, the sedimentation device having an inclined surface;

[0007] The tank is provided with a liquid inlet channel that extends downwards to below the sedimentation device.

[0008] The tank is also equipped with a drain port on the side wall and a waste discharge port at the bottom.

[0009] According to a second aspect of the embodiments of this application, a cutting fluid circulation system is provided, comprising: a raw fluid tank, a filter press system, and a finished product tank. The raw fluid tank is used to receive the cutting fluid discharged from the wire cutting machine, the finished product tank is used to supply cutting fluid to the wire cutting machine, and the filter press system is located between the raw fluid tank and the finished product tank. The finished product tank employs the filter element described above.

[0010] The technical solution provided in this application embodiment includes a sedimentation device with an inclined surface installed inside the tank. Liquid injected from the immersion channel flows downwards along the inlet channel and upwards from below the sedimentation device. Solid particles and resin flocs in the cutting fluid adhere to the inclined surface of the sedimentation device and fall downwards, exiting through the impurity discharge port. The clear liquid above the sedimentation device exits through the drain port, thus separating solid particles and resin flocs and filtering the cutting fluid. This effectively removes impurities and offers advantages such as low energy consumption, environmental friendliness, and ease of operation. Attached Figure Description

[0011] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0012] Figure 1 This is a schematic diagram of the structure of the filter device provided in the embodiments of this application;

[0013] Figure 2 This is a schematic diagram of the cutting fluid circulation system provided in an embodiment of this application.

[0014] Figure label:

[0015] 1-Tank body; 11-Liquid inlet channel; 12-Drain outlet; 13-Impure outlet; 14-Impure pipe;

[0016] 2-Sedimentation device. Detailed Implementation

[0017] To make the technical solutions and advantages of the embodiments of this application clearer, the exemplary embodiments of this application will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not an exhaustive list of all embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0018] This embodiment provides a filter device for the water circulation system of a wire EDM machine. It can contain and filter the cutting fluid, which is supplied to the wire EDM machine through a liquid pipeline to cool the cutting area during operation. The wire EDM machine can be a squaring machine or a slicing machine; this embodiment uses a slicing machine as an example.

[0019] like Figure 1 As shown, the filter device provided in this embodiment includes: a tank 1 and a sedimentation device 2. The sedimentation device 2 is disposed inside the tank 1, dividing the internal space of the tank 1 into upper and lower parts. The tank 1 is provided with a liquid inlet channel 11, which extends downward below the sedimentation device 2. The side wall of the tank 1 is provided with a drain port 12, and the bottom is provided with a waste discharge port 13.

[0020] The cutting fluid enters the tank 1 through the inlet channel 11. When the liquid volume is sufficient, the liquid level gradually rises, submerging the sedimentation device 2. The sedimentation device 2 has an inclined surface. Impurities in the cutting fluid adhere to the inclined surface of the sedimentation device 2 and fall downwards under gravity. The cutting fluid above the sedimentation device 2 is discharged from the drain port 12, while impurities are discharged from the waste discharge port 13. The filtration capacity is high, increasing the filtration capacity per unit area by 3 to 5 times.

[0021] The technical solution provided in this embodiment involves installing a sedimentation device with an inclined surface inside the tank. Liquid injected into the tank through the immersion channel flows downwards along the inlet channel and upwards from below the sedimentation device. Impurities in the cutting fluid adhere to the inclined surface of the sedimentation device and fall downwards, exiting through the impurity discharge port. The clear liquid above the sedimentation device exits through the drain port, thus separating solid particles and resin flocs and filtering the cutting fluid. This effectively removes precipitates / flocculations and offers advantages such as low energy consumption, environmental friendliness, and ease of operation.

[0022] The aforementioned impurities can be amorphous adhesives and crystalline precipitates remaining on the silicon wafer surface, such as resin adhesive or resin board residues, or silicon powder particles. Large amounts of these residues adsorb together to form flocculent matter.

[0023] The tank is made of stainless steel with a vulcanized rubber layer on the inner surface, which provides corrosion resistance and prevents suspended solids from adhering to the tank wall. The tank volume provided in this embodiment is approximately 38 cubic meters, and the water treatment capacity is (2-10) T / H.

[0024] The aforementioned liquid inlet channel 11 extends downward along the inner wall of the tank 1, allowing the liquid to flow directly to the bottom of the sedimentation device 2, during which large particulate impurities directly settle to the bottom of the tank 1. A liquid inlet is provided at the upper part of the tank 1, and the liquid inlet is connected to the liquid inlet channel 11.

[0025] The drain port 12 is higher than the sedimentation device 2 to ensure that the discharged cutting fluid contains very few impurities. The drain port 12 can be equipped with a switch valve, which can be opened to perform the draining operation.

[0026] There are at least two discharge ports 13, spaced apart on the bottom wall of the tank 1, to discharge as many impurities as possible from the bottom of the tank 1. Each discharge port 13 is connected to a discharge pipe 14 for collection and treatment. A switch valve can be installed at each discharge port 13; opening the switch valve allows for discharge operation.

[0027] The tilt angle and flow rate of the tilted surface of the above-mentioned sedimentation device 2 can be set according to the test data of the original cutting fluid, or additional flocculants can be added to increase the coagulation speed of resin flocculants.

[0028] One implementation method is as follows: the inclined surface has an inclination angle of 60°, which enables solid particles and flocs in the cutting fluid to form flocs under the action of flocculants, which then accumulate on the bottom surface of the sedimentation device 2 to form a thin mud layer, which slides downwards by gravity.

[0029] For the above-mentioned precipitation device 2, this embodiment provides one implementation method:

[0030] The sedimentation device 2 is a sedimentation plate, which is inclinedly installed inside the tank 1. The upper surface of the sedimentation plate is an inclined surface, allowing solid particles and resin flocculents to adhere to the upper surface of the sedimentation plate and gradually fall off.

[0031] Multiple sedimentation plates can be arranged in parallel and spaced apart, forming a space between adjacent sedimentation plates for liquid to flow upward and sediment to move downward. After the cutting fluid enters the tank 1 along the inlet channel 11, it flows upward through the gaps between adjacent sedimentation plates, while solid particles, resin flocs, and other sediments move downward through the gaps between adjacent sedimentation plates.

[0032] Another implementation is as follows: the sedimentation device 2 is a sedimentation tube, which is inclinedly installed inside the tank 1. The internal space of the sedimentation tube forms a space for the liquid to flow upward and the sediment to move downward. After the cutting fluid enters the tank 1 along the inlet channel 11, it flows upward from the internal space of the sedimentation tube, while solid particles, resin flocs, and other sediments move downward along the internal space of the sedimentation tube. Multiple sedimentation tubes can be arranged in parallel and side by side, or they can be arranged in a cross pattern.

[0033] Furthermore, a mesh structure or filter sand can be installed on the surface of the settling plate or settling tube to allow more solid particles and resin flocs to adhere to the surface of the settling plate or settling tube. High-pressure rinsing can then be used for cleaning.

[0034] The sedimentation plate or sedimentation tube is made of super carbon steel austenitic stainless steel, which has the advantages of strong corrosion resistance, high temperature resistance, creep resistance and strong compressive strength.

[0035] The inclined sedimentation plates or pipes utilize the theory of natural settling of dispersed particles in shallow pools (horizontal flow sedimentation principle). The unique gravity-driven sludge discharge design reduces the need for specialized sludge discharge equipment such as screw conveyors and sludge pumps, and enhances system stability. Using these filter components ensures the cleanliness of the water entering the slicer, preventing any impact on subsequent cutting lines.

[0036] The filter used in this embodiment has a single-tank treatment rate of (2-10) t / H, a sedimentation time of ≤20 min, an inclination of sedimentation plate or sedimentation tube of 60±10°, and a tank capacity of 30t.

[0037] The sedimentation plates or sedimentation tubes are installed by insertion, and the number of sedimentation plates or sedimentation tubes can be controlled according to different water conditions. When there is less sedimentation, small-spaced sedimentation plates or sedimentation tubes are used for filtration; when there is more sedimentation, the spacing is increased to prevent the gaps between sedimentation plates or sedimentation tubes from being blocked.

[0038] The vertical net distance between sedimentation plates or sedimentation tubes is (60-120) mm, and the length of sedimentation plates or sedimentation tubes is (1-1.5) m; the influent suspended solids content is ≤2000 mg / L, and the effluent suspended solids content is less than or equal to 10 mg / L.

[0039] Based on the above technical solutions, this embodiment also provides a cutting fluid circulation system, such as... Figure 2 As shown, the cutting fluid circulation system includes: a waste fluid pool, a raw fluid tank, a filter fluid tank, a mixing tank, a finished product tank, and a filter element provided by any of the above (i.e., Figure 2 The inclined plate sedimentation device (or inclined tube sedimentation device) is used in the process. The liquid inlet of the waste liquid tank is connected to the slicer. The waste liquid discharged from the slicer sequentially enters the waste liquid tank, the raw liquid tank, the filtrate tank, the mixing tank, the finished product tank, and the filter element for treatment before returning to the slicer. The filter element is used to filter the liquid discharged from the finished product tank and then supply it back to the slicer.

[0040] Furthermore, a bag filter is used, installed between the waste liquid tank and the raw liquid tank, to filter the liquid discharged from the waste liquid tank. The bag filter can also be installed between the filter liquid tank and the mixing tank to filter the liquid discharged from the filter liquid tank.

[0041] In addition, a filter press is installed between the raw liquid tank and the filtered liquid tank to filter the liquid discharged from the raw liquid tank.

[0042] The above solution employs multi-stage filtration to improve filtration efficiency, remove as much flocculent material as possible from the liquid discharged from the slicer, improve the cleanliness of the liquid, and then return it to the slicer, which can improve cutting quality and reduce water costs.

[0043] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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 therefore should not be construed as a limitation of this application.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0045] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0046] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0047] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A filter element used in the water circulation system of a wire cutting machine, characterized in that, include: The tank body and the sedimentation device disposed within the tank body, the sedimentation device having an inclined surface; The tank is provided with a liquid inlet channel that extends downwards to below the sedimentation device. The tank is also equipped with a drain port on the side wall and a waste discharge port at the bottom.

2. The filter element according to claim 1, characterized in that, The liquid inlet channel extends downwards along the inner wall of the tank.

3. The filter element according to claim 1, characterized in that, The drain outlet is higher than the sedimentation device.

4. The filter element according to claim 1, characterized in that, The number of discharge ports is at least two, which are spaced apart on the bottom wall of the tank; each discharge port is connected to a discharge pipe.

5. The filter element according to any one of claims 1-4, characterized in that, The sedimentation device is a sedimentation plate, which is inclinedly arranged inside the tank.

6. The filter element according to claim 5, characterized in that, Multiple sedimentation plates are arranged in parallel and spaced apart; adjacent sedimentation plates form a space for liquid to flow upward and sediment to move downward.

7. The filter element according to any one of claims 1-4, characterized in that, The sedimentation device is a sedimentation tube, which is inclinedly installed inside the tank; the internal space of the sedimentation tube forms a space for the liquid to flow upward and the sediment to move downward.

8. The filter element according to claim 7, characterized in that, Multiple sedimentation tubes are arranged in parallel.

9. A cutting fluid circulation system, characterized in that, include: The waste liquid pool, the raw liquid tank, the filtrate tank, the mixing tank, the finished product tank, and the filter element as described in any one of claims 1-8; the liquid inlet of the waste liquid pool is connected to the slicer, and the waste liquid discharged from the slicer sequentially enters the waste liquid pool, the raw liquid tank, the filtrate tank, the mixing tank, the finished product tank, and the filter element for treatment before returning to the slicer.

10. The cutting fluid circulation system according to claim 9, characterized in that, Also includes: Bag filters are installed between the waste liquid pool and the raw liquid tank, as well as between the filtered liquid tank and the mixing tank; A filter press is installed between the raw liquid tank and the filtered liquid tank.

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