Cutting fluid circulation filter assembly with self-cleaning screen

Abstract

The utility model relates to the technical field of machining accessories, concretely to cutting fluid circulating filter assembly with self-cleaning filter screen, including filter box, the bottom end of filter box is equipped with storage box, is divided into multiple filter cavities in filter box, is equipped with overflow port in filter cavity front side cavity wall, the rear side of overflow port is installed with filter mechanism, filter mechanism includes sleeve frame and filter screen, filter screen is tubular structure, filter screen coaxial connection has rotating motor, the rear side of filter screen is provided with a pair of hoop plate. The cutting fluid circulating filter assembly with self-cleaning filter screen, through the rotating motor with sleeve frame of setting, make filter screen rotatable under the drive of rotating motor, the arc mouth of sleeve frame and the outer surface of filter screen continuously rub in the rotation process, can scrape off the part impurity attached to filter screen surface, realize the independent cleaning of filter screen, do not need manual frequent disassembly and cleaning, reduced the manual maintenance cost, avoided the interruption of filtering operation caused by shutdown cleaning simultaneously, guarantee the continuity of cutting fluid circulation filtering.

Description

Technical Field

[0001] This utility model relates to the field of machining parts technology, specifically to a cutting fluid circulation filtration assembly with a self-cleaning filter screen. Background Technology

[0002] Cutting fluid plays a crucial role in machining by cooling and lubricating cutting tools and workpieces. However, during use, cutting fluid easily mixes with impurities such as iron filings and sludge. Direct discharge not only wastes resources but may also pollute the environment. Therefore, cutting fluid circulation and filtration is a critical step. By using appropriate technologies to remove impurities, the cutting fluid can be reused, reducing production costs and aligning with the concept of green production.

[0003] Utility model patent CN215388077U discloses a simple cutting fluid circulation filtration device. This device includes a top-opening primary filtration tank, a middle-level secondary filtration tank, and a bottom-level tertiary storage tank. Used cutting fluid is pumped into the primary filtration tank via a cutting fluid inlet pump. After impurities are settled in the primary filtration tank, the cutting fluid passes through a coarse primary filter and enters the secondary filtration tank. In the secondary filtration tank, oil and sludge are separated by an oil separator, and the cutting fluid passes through a fine secondary filter and enters the tertiary storage tank. The tertiary storage tank is equipped with a circulation pump that circulates the cutting fluid back to the primary filtration tank. This simple cutting fluid circulation filtration device not only improves the purity of the cutting fluid but also increases the contact time between the cutting fluid and oxygen, thus avoiding environmental pollution caused by frequent cutting fluid replacements and reducing the economic burden on enterprises.

[0004] This simple cutting fluid circulation filtration device uses its primary coarse filter and secondary fine filter as fixed filtration components. During long-term filtration, impurities such as iron filings and sludge gradually adhere to the filter surface. Furthermore, the device lacks any cleaning mechanism for the filter, requiring manual disassembly and cleaning periodically. This not only increases labor costs but also interrupts the filtration process, affecting the continuity of cutting fluid circulation filtration. Therefore, we propose a cutting fluid circulation filtration assembly with a self-cleaning filter. Utility Model Content

[0005] The purpose of this invention is to provide a cutting fluid circulation filtration assembly with a self-cleaning filter screen to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A cutting fluid circulation filtration assembly with a self-cleaning filter screen includes a filter box, a storage box at the bottom of the filter box, several partitions are horizontally fixed inside the filter box, the partitions divide the internal space of the filter box into multiple filter chambers, an overflow port is opened at the front wall of the filter chamber, the height of the overflow ports decreases from back to front, and a through-hole is opened at the top front of the storage box, with the overflow port at the foremost end located above the through-hole;

[0008] A filter mechanism is installed at the rear of the overflow port. The filter mechanism includes a frame nested in the overflow port and a filter screen attached to the rear end of the frame. A window is opened in the middle of the frame. Arc-shaped openings are opened at the top and bottom edges of the rear end of the window. The filter screen has a cylindrical structure and is coaxially connected to a rotating motor. The rotating motor is installed on the outer surface of the filter box. A pair of clamps are provided at the rear of the filter screen to press the filter screen against the two arc-shaped openings.

[0009] Preferably, an inlet pipe is connected to the top of the rear end of the filter box, and the end of the inlet pipe is connected to the filter chamber located at the rear end.

[0010] This setting allows for precise delivery of the cutting fluid to be filtered to the final filter chamber, initiating the filtration process.

[0011] Preferably, a circulation pump is installed at the side edge of the top of the storage tank, and the circulation pump is used to deliver the cutting fluid in the storage tank to the filter chamber located at the rear end;

[0012] Preferably, an output pump is also installed at the side edge of the top of the storage tank, the output pump being used to deliver the cutting fluid in the storage tank into the equipment;

[0013] In these two settings, the circulation pump can circulate and filter the cutting fluid to improve its purity, while the output pump can deliver qualified cutting fluid to the equipment.

[0014] Preferably, the sleeve frame is a rectangular frame structure made of rubber material, and the outer four sides of the sleeve frame are provided with sleeve grooves. The size of the sleeve grooves is adapted to the size of the overflow port, and the sleeve frame is nested in the overflow port through the sleeve grooves.

[0015] In this setup, the rubber sleeve reduces leakage through gaps, and the groove design improves the stability of the sleeve installation.

[0016] Preferably, both ends of the filter screen are closed with circular mesh plates, and a fixed shaft is coaxially fixed in the filter screen. The end of the fixed shaft is coaxially connected to the end of the output shaft of the rotating motor using a coupling.

[0017] In this setup, the circular screen prevents impurities from entering from the end, and the fixed shaft and coupling transmit power to rotate the filter screen.

[0018] Preferably, the hoop plate has an arc-shaped plate structure. The hoop plate fits against the arc-shaped surface of the rear side of the filter screen. Both ends of the hoop plate are provided with protrusions. A fixing post is fixed at the front end of the protrusion. The end of the fixing post penetrates the front wall of the filter chamber and is fixed with a baffle post. A spring is sleeved on the outside of the fixing post located behind the baffle post. The spring is in a compressed state and abuts against the partition plate at the corresponding position in the filter box or the front end face of the filter box. Under the elastic force of the spring, the fixing post always pulls the hoop plate forward, so that the hoop plate presses the filter screen against the rear side of the frame.

[0019] In this setup, the arc-shaped clamp fits snugly against the filter screen, and the spring force ensures that the filter screen remains firmly pressed against the frame, guaranteeing the filtration effect.

[0020] Preferably, the filter mechanism is further provided with a fixing strip, which is installed between the rear end faces of the two hoop plates by bolts. A cleaning brush is provided on the front surface of the fixing strip, and the end of the cleaning brush abuts against the outer surface of the filter screen.

[0021] In this setup, the fixing strip enhances the stability of the hoop plate, and the cleaning brush removes impurities from the filter screen surface, reducing buildup.

[0022] Compared with the prior art, the beneficial effects of this utility model are:

[0023] 1. This cutting fluid circulation filtration assembly with a self-cleaning filter screen uses a rotating motor and a sleeve frame to allow the filter screen to rotate under the drive of the motor. During the rotation, the outer surface of the filter screen continuously rubs against the arc-shaped opening of the sleeve frame, which can scrape off some of the impurities attached to the surface of the filter screen, thus achieving self-cleaning of the filter screen. This eliminates the need for frequent manual disassembly and cleaning, reducing manual maintenance costs and avoiding interruptions in filtration operations caused by machine downtime for cleaning, ensuring the continuity of cutting fluid circulation filtration.

[0024] 2. This cutting fluid circulation filter assembly with a self-cleaning filter screen, through the additional fixing strip and cleaning brush, ensures that the cleaning brush is always in contact with the outer surface of the rotating filter screen. On the basis of the friction cleaning between the filter screen and the frame, it can further clean the fine impurities remaining on the surface of the filter screen, reduce the accumulation of impurities on the surface of the filter screen, and reduce the risk of filter screen clogging. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0026] Figure 2 This is a schematic diagram of the filter box in this utility model;

[0027] Figure 3 This is an exploded view of the filtration mechanism in this utility model;

[0028] Figure 4 This is a cross-sectional view of the frame in this utility model;

[0029] Figure 5 This is a schematic diagram of the hoop plate in this utility model;

[0030] The meanings of the labels in the diagram are as follows:

[0031] 100. Filter box; 110. Partition; 120. Filter chamber; 130. Overflow port; 140. Liquid inlet pipe;

[0032] 200. Storage tank; 210. Inlet; 220. Circulation pump; 230. Output pump;

[0033] 300. Filter mechanism; 310. Frame; 311. Groove; 312. Window; 313. Arc-shaped opening; 320. Filter screen; 321. Fixed shaft; 322. Rotating motor; 330. Hoop plate; 331. Thrust; 332. Fixed column; 333. Stop column; 334. Spring; 340. Fixing strip; 341. Cleaning brush. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] In the description of this utility model, 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", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component 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 utility model.

[0036] Example 1

[0037] Please see Figure 1 and Figure 2A cutting fluid circulation filtration assembly with a self-cleaning filter screen includes a filter box 100 and a storage tank 200 at the bottom of the filter box 100. The storage tank 200 collects and stores the filtered cutting fluid, providing space for subsequent recycling or delivery to equipment. Several baffles 110 are horizontally fixed inside the filter box 100, dividing the internal space into multiple filtration chambers 120. These chambers form a multi-stage filtration path, allowing the cutting fluid to flow gradually within different filtration chambers 120, providing a foundation for subsequent staged filtration. Overflow ports 130 are provided on the front wall of each filtration chamber 120. The height of the overflow ports 130 decreases progressively from back to front. This gradient design guides the cutting fluid to automatically flow from the rear filtration chamber 120 to the front filtration chamber 120 after reaching a certain level, achieving orderly flow of the cutting fluid. An opening 210 is provided at the top front end of the storage tank 200, and an overflow port 130 at the front end is located above the opening 210. This positional relationship ensures that the cutting fluid in the front filter chamber 120 can flow smoothly into the storage tank 200 through the overflow port 130 and the opening 210, thus completing the collection of the filtered cutting fluid.

[0038] In this invention, an inlet pipe 140 is connected to the top of the rear end of the filter tank 100. The end of the inlet pipe 140 is connected to the filter chamber 120 located at the rear end. The inlet pipe 140 can serve as an input channel for the cutting fluid to be filtered, accurately delivering the external cutting fluid to be filtered to the filter chamber 120 at the rear end to start the entire filtration process. A circulation pump 220 is installed at the side edge of the top of the storage tank 200. The circulation pump 220 is used to deliver the cutting fluid in the storage tank 200 to the filter chamber 120 located at the rear end. The circulation pump 220 can drive the cutting fluid in the storage tank 200 to re-enter the filter chamber 120, realizing the circulation filtration of the cutting fluid and improving the purity of the cutting fluid.

[0039] Specifically, an output pump 230 is installed at the side edge of the top of the storage tank 200. The output pump 230 is used to deliver the cutting fluid in the storage tank 200 to the equipment. When the purity of the cutting fluid in the storage tank 200 meets the usage requirements, the output pump 230 can quickly deliver the filtered cutting fluid to the external equipment to provide the required cutting fluid for the operation of the equipment.

[0040] It is worth noting that the circulating pump 220 and the output pump 230 involved in this embodiment are both existing conventional technologies, and will not be described in detail in this utility model.

[0041] In this embodiment, the cutting fluid circulation filtration assembly with a self-cleaning filter is used as follows: First, the cutting fluid to be filtered is delivered to the last filter chamber 120 in the filter box 100 through the inlet pipe 140. Then, as the cutting fluid accumulates in the last filter chamber 120, the liquid level gradually rises. When the liquid level reaches the height of the overflow port 130 on the front side of the filter chamber 120, the cutting fluid flows into the adjacent filter chamber 120 on the front side through the overflow port 130. Then, following the above process, the cutting fluid circulates through each filter chamber on the front side. The fluid flows sequentially within the filter chamber 120 until it reaches the frontmost filter chamber 120. It then flows into the storage tank 200 through the overflow port 130 of the frontmost filter chamber 120 and the inlet 210 of the storage tank 200. Finally, if it is necessary to improve the purity of the cutting fluid, the circulation pump 220 can be started to transport the cutting fluid in the storage tank 200 back to the rearmost filter chamber 120 for circulation filtration. If the purity of the cutting fluid meets the usage requirements, the output pump 230 can be started to transport the cutting fluid in the storage tank 200 to external equipment.

[0042] Example 2

[0043] In order to filter the cutting fluid flowing through the overflow port 130, such as Figures 1-5 As shown, a filter mechanism 300 is installed at the rear of the overflow port 130. The filter mechanism 300 intercepts and filters the cutting fluid flowing through the overflow port 130, removing impurities from the cutting fluid. The filter mechanism 300 includes a frame 310 nested in the overflow port 130 and a filter screen 320 attached to the rear end of the frame 310. The frame 310 provides mounting support for the filter screen 320 and, together with the filter screen 320, forms a filtration structure, ensuring that the cutting fluid must pass through the filter screen 320 when flowing through it. The frame 310 is a rectangular frame structure made of rubber material. The rubber material has a certain degree of elasticity, allowing the frame 310 to fit tightly against the inner wall of the overflow port 130, reducing the possibility of unfiltered cutting fluid flowing out from gaps. The outer four sides of the sleeve frame 310 are provided with sleeve grooves 311. The size of the sleeve grooves 311 is adapted to the size of the overflow port 130. The sleeve frame 310 is nested in the overflow port 130 through the sleeve grooves 311. The matching design of the sleeve grooves 311 and the overflow port 130 can realize the precise installation of the sleeve frame 310 in the overflow port 130, improve the stability of the sleeve frame 310 after installation, and prevent the sleeve frame 310 from being displaced under the impact of cutting fluid.

[0044] like Figure 1 , Figure 3 and Figure 4As shown, in this embodiment, a through window 312 is provided in the middle of the frame 310. The through window 312 serves as a flow channel for the cutting fluid, allowing the cutting fluid filtered by the filter screen 320 to flow through the through window 312 to the overflow port 130. Arc-shaped openings 313 are provided on both the top and bottom edges of the rear end of the through window 312. The arc-shaped structure of the openings 313 allows for better contact with the outer surface of the filter screen 320, reducing the gap between the filter screen 320 and the frame 310, while also providing space for the rotation of the filter screen 320. The filter screen 320 has a cylindrical structure, which increases the contact area between the filter screen 320 and the cutting fluid, improving filtration efficiency, and also facilitates the adhesion of impurities to the outer surface of the filter screen 320. A rotating motor 322 is coaxially connected to the filter screen 320. The rotating motor 322 is mounted on the outer surface of the filter box 100. The rotating motor 322 provides driving force to rotate the filter screen 320 around its own axis, providing the power basis for the self-cleaning of the filter screen 320. Both ends of the filter screen 320 are sealed with circular mesh plates. The circular mesh plates can block both ends of the filter screen 320 to prevent impurities from entering the interior of the filter screen 320 from the ends, ensuring that the cutting fluid is completely filtered through the side walls of the filter screen 320. A fixed shaft 321 is coaxially fixed in the filter screen 320. The end of the fixed shaft 321 is coaxially connected to the end of the output shaft of the rotating motor 322 using a coupling. The fixed shaft 321 can stably transmit the power of the rotating motor 322 to the filter screen 320, ensuring that the rotating motor 322 can drive the filter screen 320 to rotate synchronously when it starts.

[0045] like Figure 1 , Figure 3 and Figure 5As shown, specifically, a pair of clamping plates 330 are provided on the rear side of the filter screen 320 to press the filter screen 320 against the two arc-shaped openings 313. The clamping plates 330 can apply a forward force to the filter screen 320, ensuring that the filter screen 320 is always tightly fitted with the arc-shaped openings 313 of the sleeve frame 310, preventing unfiltered cutting fluid from flowing directly through due to gaps between them. The clamping plates 330 have an arc-shaped plate structure, fitting against the arc-shaped surface of the rear side of the filter screen 320. The arc-shaped plate structure allows the clamping plates 330 to better fit against the outer surface of the cylindrical filter screen 320, increasing the contact area and improving the stability of the clamping against the filter screen 320. Both ends of the clamping plates 330 are provided with protrusions 331, which provide installation positions for the fixing posts 332, allowing the fixing posts 332 to be stably connected to the clamping plates 330. A fixing post 332 is fixed to the front end of the boss 331. The end of the fixing post 332 penetrates the front wall of the filter chamber 120 and is fixed with a stop post 333. The fixing post 332 can serve as a support connector for the hoop 330. The stop post 333 can limit the movement range of the fixing post 332 within the wall of the filter chamber 120, preventing the fixing post 332 from coming out of the wall. A spring 334 is sleeved on the outside of the fixing post 332 located behind the stop post 333. The spring 334 is in a compressed state and abuts against the partition 110 or the front end face of the filter box 100 at the corresponding position. The compressed spring 334 can generate a forward elastic force, which is transmitted to the hoop 330 through the fixing post 332 and the boss 331, providing a continuous force for the hoop 330 to press against the filter screen 320. Under the elastic force of spring 334, fixed column 332 always pulls hoop 330 forward, so that hoop 330 presses filter screen 320 against the back of sleeve frame 310, ensuring that filter screen 320 can still maintain a tight fit with sleeve frame 310 during rotation or when impacted by cutting fluid, thus ensuring filtration effect.

[0046] like Figure 3 As shown, the filter mechanism 300 further includes a fixing strip 340, which is bolted between the rear ends of the two hoop plates 330. The fixing strip 340 connects the two hoop plates 330 into a single unit, improving the structural stability of the two hoop plates 330 and preventing any single hoop plate 330 from shifting. A cleaning brush 341 is provided on the front surface of the fixing strip 340. The end of the cleaning brush 341 abuts against the outer surface of the filter screen 320. When the filter screen 320 rotates, the cleaning brush 341 can clean the impurities attached to the outer surface of the filter screen 320, reducing the accumulation of impurities on the surface of the filter screen 320 and maintaining the filtration efficiency of the filter screen 320.

[0047] It is worth noting that the rotating motor 322 involved in this utility model is a conventional technology and will not be described in detail here.

[0048] In this embodiment, the cutting fluid circulation filtration assembly with a self-cleaning filter screen works as follows: First, the cutting fluid flows through the filter chamber 120 to the overflow port 130. As it flows through the filter screen 320, the filter screen 320 intercepts and filters impurities in the cutting fluid. The filtered cutting fluid then flows sequentially through the window 312 of the sleeve 310 and the overflow port 130 to the front filter chamber 120 or the storage tank 200. Then, the rotating motor 322 is started. The rotating motor 322 drives the filter screen 320 to rotate via the fixed shaft 321. Under the elastic force of the spring 334, the clamp plate 330 remains constantly... The filter screen 320 is pressed against the arc-shaped opening 313 of the frame 310. During the rotation of the filter screen 320, its outer surface continuously rubs against the arc-shaped opening 313, scraping off some of the attached impurities. Then, as the filter screen 320 continues to rotate, the cleaning brush 341 on the fixing strip 340 continuously contacts the outer surface of the filter screen 320, further cleaning the impurities remaining on the surface of the filter screen 320. Finally, the scraped and cleaned impurities fall into the bottom of the filter chamber 120 under the action of gravity, completing the self-cleaning of the filter screen 320 and ensuring that the filter screen 320 maintains a good filtration state for a long time.

[0049] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. 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 preferred examples and are not intended to limit the 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 cutting fluid circulation filtration assembly with a self-cleaning filter screen, comprising a filter box (100) and a storage tank (200) at the bottom of the filter box (100), characterized in that: The filter box (100) is horizontally fixed with several partitions (110). The multiple partitions (110) divide the internal space of the filter box (100) into multiple filter chambers (120). An overflow port (130) is provided on the front wall of the filter chamber (120). The height of the multiple overflow ports (130) decreases from back to front. A through-hole (210) is provided at the top of the front end of the storage box (200). The overflow port (130) at the front end is located above the through-hole (210). A filter mechanism (300) is installed at the rear of the overflow port (130). The filter mechanism (300) includes a frame (310) nested in the overflow port (130) and a filter screen (320) attached to the rear end of the frame (310). A window (312) is provided in the middle of the frame (310). Arc-shaped openings (313) are provided at the top and bottom edges of the rear end of the window (312). The filter screen (320) has a cylindrical structure. A rotating motor (322) is coaxially connected to the filter screen (320). The rotating motor (322) is installed on the outer surface of the filter box (100). A pair of clamps (330) are provided on the rear side of the filter screen (320) to press the filter screen (320) against the two arc-shaped openings (313).

2. The cutting fluid circulation filtration assembly with a self-cleaning filter screen according to claim 1, characterized in that: A liquid inlet pipe (140) is connected to the top of the rear end of the filter box (100), and the end of the liquid inlet pipe (140) is connected to the filter chamber (120) located at the rear end.

3. The cutting fluid circulation filtration assembly with a self-cleaning filter screen according to claim 1, characterized in that: A circulation pump (220) is installed at the side edge of the top of the storage tank (200). The circulation pump (220) is used to deliver the cutting fluid in the storage tank (200) to the filter chamber (120) located at the rear end.

4. The cutting fluid circulation filtration assembly with a self-cleaning filter screen according to claim 1, characterized in that: An output pump (230) is also installed at the side edge of the top of the storage tank (200), which is used to deliver the cutting fluid in the storage tank (200) into the equipment.

5. The cutting fluid circulation filtration assembly with a self-cleaning filter screen according to claim 1, characterized in that: The sleeve frame (310) is a rectangular frame structure made of rubber material. The sleeve frame (310) has a sleeve groove (311) on all four sides of its outer side. The size of the sleeve groove (311) is adapted to the size of the overflow port (130). The sleeve frame (310) is nested in the overflow port (130) through the sleeve groove (311).

6. The cutting fluid circulation filtration assembly with a self-cleaning filter screen according to claim 1, characterized in that: Both ends of the filter screen (320) are closed with circular mesh plates. A fixed shaft (321) is coaxially fixed in the filter screen (320). The end of the fixed shaft (321) is coaxially connected to the end of the output shaft of the rotating motor (322) using a coupling.

7. The cutting fluid circulation filtration assembly with a self-cleaning filter screen according to claim 1, characterized in that: The hoop (330) has an arc-shaped plate structure. The hoop (330) fits against the arc-shaped surface of the rear side of the filter screen (320). Both ends of the hoop (330) are provided with protrusions (331). A fixing post (332) is fixed to the front end of the protrusion (331). The end of the fixing post (332) penetrates the front wall of the filter chamber (120) and is fixed with a baffle post (333). The fixing post (333) is located behind the baffle post (333). 332) A spring (334) is sleeved on the outside. The spring (334) is in a compressed state. The spring (334) abuts against the partition (110) at the corresponding position in the filter box (100) or the front end face of the filter box (100). Under the elastic force of the spring (334), the fixing column (332) always pulls the hoop (330) forward, so that the hoop (330) presses the filter screen (320) against the back side of the frame (310).

8. The cutting fluid circulation filtration assembly with a self-cleaning filter screen according to claim 1, characterized in that: The filter mechanism (300) is also provided with a fixing strip (340), which is installed between the rear end faces of two hoop plates (330) by bolts. A cleaning brush (341) is provided on the front surface of the fixing strip (340), and the end of the cleaning brush (341) abuts against the outer surface of the filter screen (320).

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