Magnetic separation type cutting fluid filtering device

Abstract

The utility model discloses a kind of magnetic separation type cutting fluid filtering devices, comprising: upper cover, filter core, U-shaped magnet, tank body;Filter core is inside tank body, the screw bushing support ring inner thread of lower end is connected with the screw seat outer thread of tank body bottom, the outer sealing washer of filter core upper end is in abutment with the limiting step of tank body;Upper cover is connected on the upper end of tank body, U-shaped magnet is located tank body outside annular distribution, and its arc is on the upper side of tank body.The utility model outlet pipe is in the upper left side of the shell of tank body, water inlet pipe is in the bottom right side of the shell of tank body, and inlet and outlet can form cyclone, effectively improve centrifugal separation effect;U-shaped magnet can adsorb centrifugal separation carbon steel scrap and cast iron scrap, and magnetic separation separation;Coarse filter screen can reduce the impurities that block fine filter screen, improve fine filter screen filtering precision, also not easy to block, filter precision and prevent blocking property are taken into account;Coarse filter core and fine filter core are both conical structure, inside and outside are open to the outside, can two-way flush, two-way blow clean, cleaning thorough.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical processing equipment technology, and specifically relates to a cutting fluid filtration device. Background Technology

[0002] Machine tools typically employ a recycling system for their cutting fluid supply. During cutting and grinding processes, a large amount of metal chips, grinding wheel particles, and other contaminants are generated. Metal chips constitute the majority of these impurities, with ferromagnetic carbon steel and cast iron chips often accounting for over 80%. When these impurities re-enter the cutting fluid, they negatively impact machining quality and cause equipment wear. Therefore, cutting fluid filters are commonly used to purify the circulating cutting fluid during metal processing. This effectively removes these impurities, prevents their re-entry into the cutting fluid, reduces equipment wear, and minimizes the impact on machining quality.

[0003] However, high filtration accuracy can easily lead to clogging of the cutting fluid filter, resulting in reduced cutting fluid flow, decreased flushing and lubrication effects, increased pressure differential in the cutting fluid recycling device, and increased pump wear. Low filtration accuracy, on the other hand, results in more residual impurities in the cutting fluid, which can wear down equipment and scratch the surface of the workpiece. Balancing filtration accuracy and clogging resistance has become a dilemma.

[0004] To balance filtration accuracy and clogging resistance, existing cutting fluid filters and other filters typically employ a side-mounted circular shell to generate swirling flow. Centrifugal separation is performed before filtration, and the filter element is designed as a cylindrical, circumferentially toothed, pleated structure to increase the filtration area and improve permeability. However, because the filter element is cylindrical, the outlet can only be positioned in the center of the filter element's inner hole, preventing the formation of swirling flow. Swirling flow can only be generated at the inlet, resulting in limited effectiveness. Furthermore, the cylindrical, circumferentially toothed, pleated structure necessitates increasing the tooth height to increase the filtration area, leading to a smaller inner hole. This makes it difficult for operators to use a high-pressure water gun to rinse the filter element from the inside out, making cleaning inconvenient. Utility Model Content

[0005] In view of the shortcomings of the existing technology, this utility model draws on the magnetic separation principle of magnetic separation equipment and the staged filtration principle of pre-coarse filter for diesel fuel filter, and introduces a magnetic separation cutting fluid filtration device.

[0006] The specific solution of this utility model is as follows: A magnetic separation cutting fluid filtration device includes: a top cover, a filter element, a U-shaped magnet, and a tank; the filter element is located inside the tank, and the inner thread of the lower end of the threaded sleeve support ring is connected to the outer thread of the threaded seat at the bottom of the tank, and the threads are filled with PTFE tape for sealing; the outer sealing gasket at the upper end of the filter element abuts against the limiting step of the tank; the top cover is fitted onto the upper end of the inner side of the tank for a sealed connection; the U-shaped magnet is located on the outer side of the tank and is evenly distributed in a ring, with the arc of the U-shaped magnet located on the upper side of the tank opening.

[0007] The inner side of the top cover has a cylindrical step.

[0008] The filter element has a conical structure and includes: a coarse filter element and a fine filter element; the fine filter element is sleeved inside the coarse filter element, the lower end of the threaded support ring of the fine filter element is located below the coarse filter element, the inner support ring of the fine filter element abuts against the upper sealing gasket of the coarse filter element, and the upper end of the threaded support ring of the fine filter element abuts against the lower sealing gasket of the coarse filter element.

[0009] The coarse filter element has a conical structure and includes: a lower support ring, a coarse filter screen, an outer sealing gasket, an upper sealing gasket, an upper support ring, a skeleton mesh, and a lower sealing gasket; the upper end of the skeleton mesh is connected to the upper support ring, and the lower end is connected to the lower support ring; the outer sealing gasket is located at the upper outer side of the upper support ring, the upper sealing gasket is located at the inner side of the upper support ring, and the lower sealing gasket is located at the inner side of the lower support ring; the upper end of the coarse filter screen is connected to the lower outer side of the upper support ring, the lower end is connected to the outer side of the lower support ring, and the inner teeth are connected to the outer side of the skeleton mesh.

[0010] Both the lower and upper support rings are conical structures made of chromium-based austenitic stainless steel.

[0011] The coarse filter screen has a circular toothed structure and is made of diesel filter screen.

[0012] The skeleton mesh has a conical structure and is made of chromium-based austenitic stainless steel coarse screen, which balances mechanical strength and water permeability.

[0013] The fine filter element has a conical structure, including: a screw sleeve support ring, a support mesh, an inner support ring, and a fine filter screen; the upper end of the support mesh is connected to the inner support ring, and the lower end is connected to the screw sleeve support ring; the fine filter screen is located inside the fine filter element, with its upper end connected to the inner side of the inner support ring, its lower end connected to the upper end of the inner side of the screw sleeve support ring, and its inner teeth connected to the inner side of the support mesh.

[0014] The threaded sleeve support ring has an upper cone and a lower cylinder, forming a flared structure, with the lower cylinder having internal threads; the material is chromium-based austenitic stainless steel.

[0015] The support mesh has a conical structure and is made of chromium-based austenitic stainless steel coarse screen, which balances mechanical strength and water permeability.

[0016] The inner support ring has a conical structure and is made of chromium-based austenitic stainless steel.

[0017] The fine filter screen has a circular toothed structure and is made of diesel fuel filter screen.

[0018] The tank body includes: a limiting step, an inlet pipe, a screw seat, a drain pipe, a sealing gasket, a plug, a shell, and an outlet pipe; the outlet pipe is located on the upper left side of the shell, with its outer circle smoothly tangent to the arc of the outer circle of the shell; the limiting step is located below the outlet pipe opening, in the middle section of the inner hole of the shell; the inlet pipe is located on the right side of the bottom of the shell, with its inlet flush with the smooth tangent of the outer circle and the arc of the outer circle of the shell; the lower end of the screw seat is fitted into the middle hole at the bottom of the shell; the upper end of the drain pipe is fitted into the left side hole at the bottom of the shell, flush with the bottom of the shell, and the screw hole of the drain pipe is fitted with the thread of the plug; the sealing gasket is located between the drain pipe and the plug, and is fitted with the thread of the plug.

[0019] The shape of the limiting step is matched with the upper end of the coarse filter element.

[0020] The screw seat is a cylindrical structure with an external thread at the upper end that matches the internal thread of the screw sleeve support ring.

[0021] The sewage pipe is provided with a straight threaded hole that matches the plug.

[0022] The plug is an interference fit nylon bolt, which has a good anti-loosening effect.

[0023] The shell is made of carbon steel.

[0024] The outlet of the water pipe is flush with the arc of the inner wall of the shell.

[0025] The working principle of this utility model is as follows: During the process of the cutting fluid circulating in the cutting fluid recycling device, as the cutting fluid flows into the tank from the inlet of the inlet pipe and out of the tank from the outlet pipe, it will (e.g.) Figure 6 (As shown) A swirling flow is formed in the circular inner cavity of the tank; the screw seat is a cylindrical structure that fits into the central hole at the bottom of the shell, forming an annular swirling groove at the bottom of the tank; the inner side of the top cover has a cylindrical step that forms an annular swirling groove at the top of the tank, further promoting the generation of swirling flow; both the coarse and fine filter screens have a circular toothed structure, which can reduce the resistance to swirling flow and reduce the impact on swirling flow; effectively improving the centrifugal separation effect.

[0026] The impurities separated by centrifugation will rush towards the inner side wall of the tank under the action of centrifugal force. U-shaped magnets are evenly distributed in a ring on the outside of the tank. The shell material of the tank is carbon steel, which will be magnetized by the U-shaped magnets. The carbon steel fragments and cast iron fragments, which account for the largest proportion of the impurities rushing towards the inner side wall of the tank, will be attracted and separated by magnetic separation.

[0027] After centrifugal and magnetic separation, the impurities in the cutting fluid are greatly reduced. It is then coarsely filtered through a coarse filter and then finely filtered through a fine filter before flowing out through the outlet pipe. The coarse filter can balance filtration efficiency and anti-clogging properties (see the principle of diesel pre-filter and oil coarse filter). It can effectively reduce the number of impurities that clog the fine filter, improve the filtration accuracy of the fine filter, and is not easy to clog. It balances filtration accuracy and anti-clogging properties.

[0028] This utility model has the following technical effects: The centrifugal separation effect of this utility model is good: the filter element of this utility model has a conical structure, the upper end of the filter element abuts against the limiting step of the tank body, the water outlet is located on the upper left side of the shell, realizing the oblique placement of the water outlet, and both the water inlet and the water outlet can form swirling flow. The annular swirling grooves at the bottom and top of the tank body can further promote the generation of swirling flow; both the coarse filter screen and the fine filter screen have a circular toothed structure, which can reduce the swirling flow resistance and reduce the impact on the swirling flow; thus effectively improving the centrifugal separation effect.

[0029] This invention offers excellent magnetic separation: U-shaped magnets are evenly distributed in a ring around the outside of the tank, magnetizing the tank shell and attracting the carbon steel and cast iron debris, which constitute the largest proportion of the impurities separated by centrifugation, to the inner wall of the tank, thus achieving magnetic separation.

[0030] This invention balances filtration accuracy and anti-clogging properties: after centrifugal separation and magnetic separation, the impurities in the cutting fluid are greatly reduced. After further coarse filtration through a coarse filter that balances filtration efficiency and anti-clogging properties, the number of impurities clogging the fine filter is further reduced, improving the filtration accuracy of the fine filter and making it less prone to clogging, thus balancing filtration accuracy and anti-clogging properties.

[0031] This invention provides a more thorough cleaning: the arc of the U-shaped magnet is located on the upper side of the tank opening, acting as an arc-shaped handle. When stopping the machine for cleaning, the U-shaped magnet is pulled down by grasping the arc-shaped handle. If the suction force is strong, a chromium-based stainless steel or aluminum alloy pipe or rod can be inserted into the arc of the U-shaped magnet to act as a lever to pry open the U-shaped magnet, and then pull it down. After removing the U-shaped magnet, open the top cover, remove the plug, take out the filter element, and then rinse with a high-pressure water gun and blow it clean with a high-pressure air hose. Both the coarse and fine filter elements are conical structures with open inner and outer sides, allowing for two-way rinsing and two-way blowing for thorough cleaning. The drain pipe at the bottom of the shell is a straight-through screw hole, facilitating high-pressure water gun rinsing and high-pressure air hose blowing. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of this utility model (AA sectional view); Figure 2 This is a top view of the present invention; Figure 3 This is a schematic diagram of the filter element structure of this utility model; Figure 4 This is a schematic diagram of the coarse filter element structure of this utility model; Figure 5 This is a schematic diagram of the fine filter element structure of this utility model; Figure 6 This is a top view (CC sectional view) of the tank body of this utility model. Figure 7 This is a cross-sectional view of the tank body BB of this utility model. Detailed Implementation

[0033] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, a magnetically separated cutting fluid filtration device includes: a top cover 1, a filter element 2, a U-shaped magnet 3, and a tank 4; the filter element 2 is located inside the tank 4, and the internal thread of the lower end of the threaded sleeve support ring 2-2-1 is connected to the external thread of the threaded seat 4-3 at the bottom of the tank 4, with the threads filled with PTFE tape for sealing; the external sealing gasket 2-1-3 at the upper end of the filter element 2 abuts against the limiting step 4-1 of the tank 4; the top cover 1 is fitted onto the upper end of the inner side of the tank 4 for a sealed connection; the U-shaped magnet 3 is located on the outer side of the tank 4 and is evenly distributed in a ring, with the arc of the U-shaped magnet 3 located above the opening of the tank 4.

[0034] The inner side of the upper cover 1 has a cylindrical step.

[0035] The filter element 2 has a conical structure and includes: a coarse filter element 2-1 and a fine filter element 2-2; the fine filter element 2-2 is sleeved inside the coarse filter element 2-1, the lower end of the threaded support ring 2-2-1 of the fine filter element 2-2 is located below the coarse filter element 2-1, the inner support ring 2-2-3 of the fine filter element 2-2 abuts against the upper sealing gasket 2-1-4 of the coarse filter element 2-1, and the upper end of the threaded support ring 2-2-1 of the fine filter element 2-2 abuts against the lower sealing gasket 2-1-7 of the coarse filter element 2-1.

[0036] The coarse filter element 2-1 has a conical structure, including: a lower support ring 2-1-1, a coarse filter screen 2-1-2, an outer sealing gasket 2-1-3, an upper sealing gasket 2-1-4, an upper support ring 2-1-5, a skeleton mesh 2-1-6, and a lower sealing gasket 2-1-7; the upper end of the skeleton mesh 2-1-6 is connected to the upper support ring 2-1-5, and the lower end is connected to the lower support ring 2-1-1; the outer sealing gasket 2-1-3 is located on the upper outer side of the upper support ring 2-1-5, the upper sealing gasket 2-1-4 is located on the inner side of the upper support ring 2-1-5, and the lower sealing gasket 2-1-7 is located on the inner side of the lower support ring 2-1-1; the upper end of the coarse filter screen 2-1-2 is connected to the lower outer side of the upper support ring 2-1-5, and the lower end is connected to the outer side of the lower support ring 2-1-1, and the inner teeth are connected to the outer side of the skeleton mesh 2-1-6.

[0037] Both the lower support ring 2-1-1 and the upper support ring 2-1-5 are conical structures made of chromium-based austenitic stainless steel.

[0038] The coarse filter 2-1-2 has a circular toothed structure and is made of diesel filter coarse screen.

[0039] The skeleton mesh 2-1-6 has a conical structure and is made of chromium-based austenitic stainless steel coarse screen, which balances mechanical strength and water permeability.

[0040] The fine filter element 2-2 has a conical structure, including: a threaded sleeve support ring 2-2-1, a support mesh 2-2-2, an inner support ring 2-2-3, and a fine filter screen 2-2-4; the upper end of the support mesh 2-2-2 is connected to the inner support ring 2-2-3, and the lower end is connected to the threaded sleeve support ring 2-2-1; the fine filter screen 2-2-4 is located inside the fine filter element 2-2, with its upper end connected to the inner side of the inner support ring 2-2-3, its lower end connected to the upper end of the inner side of the threaded sleeve support ring 2-2-1, and its inner teeth connected to the inner side of the support mesh 2-2-2.

[0041] The threaded sleeve support ring 2-2-1 has an upper cone and a lower cylinder, with a flared structure and an internal thread on the lower cylinder; the material is chromium-based austenitic stainless steel.

[0042] The support mesh 2-2-2 has a conical structure and is made of chromium-based austenitic stainless steel coarse screen, which balances mechanical strength and water permeability.

[0043] The inner support ring 2-2-3 has a conical structure and is made of chromium-based austenitic stainless steel.

[0044] The fine filter screen 2-2-4 has a circular toothed structure and is made of diesel filter screen.

[0045] The tank body 4 includes: a limiting step 4-1, an inlet pipe 4-2, a screw seat 4-3, a drain pipe 4-4, a sealing gasket 4-5, a plug 4-6, a shell 4-7, and an outlet pipe 4-8; the outlet pipe 4-8 is located on the upper left side of the shell 4-7, and its outer circle is smoothly tangent to the outer circle arc of the shell 4-7; the limiting step 4-1 is located below the outlet of the outlet pipe 4-8, in the middle section of the inner hole of the shell 4-7; the inlet pipe 4-2 is located on the right side of the bottom of the shell 4-7, and its inlet is flush with the smooth tangent point of the outer circle and the outer circle arc of the shell 4-7; the lower end of the screw seat 4-3 is fitted into the middle hole at the bottom of the shell 4-7; the upper end of the drain pipe 4-4 is fitted into the left side hole at the bottom of the shell 4-7, and is flush with the bottom of the shell 4-7; the screw hole of the drain pipe 4-4 is fitted with the thread of the plug 4-6; the sealing gasket 4-5 is located between the drain pipe 4-4 and the plug 4-6, and is fitted with the thread of the plug 4-6.

[0046] The shape of the limiting step 4-1 is matched with the upper end of the coarse filter element 2-1 of the filter element 2.

[0047] The screw seat 4-3 is a cylindrical structure with an external thread at the upper end that matches the internal thread of the screw sleeve support ring 2-2-1.

[0048] The drain pipe 4-4 is provided with a straight threaded hole that matches the plug 4-6.

[0049] The plugs 4-6 are interference fit nylon bolts, which have a good anti-loosening effect.

[0050] The shell 4-7 is made of carbon steel.

[0051] The outlet of the water outlet pipe 4-8 is flush with the arc of the inner wall of the shell 4-7.

Claims

1. A magnetically separated cutting fluid filtration device, comprising: The filter element comprises a top cover, a filter element, a U-shaped magnet, and a tank body. The filter element is located inside the tank body, and the inner thread of the lower end of the screw sleeve support ring is connected to the outer thread of the screw seat at the bottom of the tank body. The outer sealing gasket at the upper end of the filter element abuts against the limiting step of the tank body. The top cover is fitted onto the upper end of the inner side of the tank body. The filter element is characterized by the U-shaped magnets being evenly distributed in a ring on the outer side of the tank body, with the arc of the U-shaped magnets located above the opening of the tank body.

2. The magnetic separation cutting fluid filtration device according to claim 1, characterized in that: The filter element has a conical structure and includes: a coarse filter element and a fine filter element; the fine filter element is sleeved inside the coarse filter element, the lower end of the threaded support ring of the fine filter element is located below the coarse filter element, the inner support ring of the fine filter element abuts against the upper sealing gasket of the coarse filter element, and the upper end of the threaded support ring of the fine filter element abuts against the lower sealing gasket of the coarse filter element.

3. The magnetic separation cutting fluid filtration device according to claim 2, characterized in that: The coarse filter element has a conical structure and includes: a lower support ring, a coarse filter screen, an outer sealing gasket, an upper sealing gasket, an upper support ring, a skeleton mesh, and a lower sealing gasket; the upper end of the skeleton mesh is connected to the upper support ring, and the lower end is connected to the lower support ring; the outer sealing gasket is located at the upper outer side of the upper support ring, the upper sealing gasket is located at the inner side of the upper support ring, and the lower sealing gasket is located at the inner side of the lower support ring; the upper end of the coarse filter screen is connected to the lower outer side of the upper support ring, the lower end is connected to the outer side of the lower support ring, and the inner teeth are connected to the outer side of the skeleton mesh.

4. A magnetic separation cutting fluid filtration device according to claim 2, characterized in that: The fine filter element has a conical structure, including: a screw sleeve support ring, a support mesh, an inner support ring, and a fine filter screen; the upper end of the support mesh is connected to the inner support ring, and the lower end is connected to the screw sleeve support ring; the fine filter screen is located inside the fine filter element, with its upper end connected to the inner side of the inner support ring, its lower end connected to the upper end of the inner side of the screw sleeve support ring, and its inner teeth connected to the inner side of the support mesh.

5. A magnetic separation cutting fluid filtration device according to claim 4, characterized in that: The threaded sleeve support ring has an upper cone and a lower cylinder, forming a flared structure, with the lower cylinder having internal threads.

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