A sand mill discharge synchronous filtration device

Abstract

This utility model discloses a synchronous filtration device based on the discharge of a sand mill, including a filter housing with an upper opening, a filter element assembly, and a top cover. The top cover is sealed to the upper opening of the filter housing. The filter element assembly is vertically disposed inside the housing and its upper end is fixedly connected to the top cover. The top of the top cover has a feed inlet communicating with the inner cavity of the filter element, and the bottom of the housing has a discharge outlet. The filter element assembly is a three-layer composite cylindrical hollow structure, consisting of a coarse anti-scratch layer, a precision filtration layer, and a thickened pressure-resistant layer from the inside out. After the material enters the inner cavity of the filter element through the feed inlet, filtration is completed from the inside out. The top cover and the housing are connected by a rotary snap-fit ​​quick-clamp assembly and are equipped with a toothed locking component to prevent loosening. The filter element is threaded to the top cover, and a base with movable pulleys is provided at the bottom of the housing. The feed inlet of this device can be connected to the discharge outlet of the sand mill, and synchronous filtration is achieved using the pressure of the sand mill itself. It eliminates the need for a transfer tank and a conveying pump, has good pressure resistance, leaves no residue in the discharge, and is easy to disassemble and maintain.

Description

Technical Field

[0001] This utility model specifically relates to a synchronous filtration device for the discharge of a sand mill. Background Technology

[0002] Sand mills are core grinding equipment in fine chemical fields such as coatings, inks, lithium battery slurries, and nanomaterials. After the materials are ground, they need to be filtered to remove large particles, agglomerated particles, and grinding media debris to ensure the quality of the finished product and avoid clogging of subsequent pipelines and equipment.

[0003] Existing sand mill discharge filtration devices have the following technical defects: First, existing filters generally adopt an external inlet and internal outlet filtration method, where material permeates from the outside of the filter element to the inside. After filtration, a large amount of material remains in the internal cavity of the filter element, resulting in incomplete discharge. This not only wastes raw materials but also, if the residual material remains and dries over a long period, it can easily contaminate subsequent production batches. Second, the connection method between the filter cover and the housing has significant shortcomings: conventional multi-bolt fastening structures are cumbersome to disassemble and assemble, making filter element replacement and equipment maintenance time-consuming and labor-intensive, resulting in long equipment downtime; some simple quick-release structures rely solely on basic snap-fit ​​connections, lacking a reliable circumferential locking mechanism. During equipment operation, the pressure impact of internal materials and machine vibration can easily cause the cover to loosen or come loose, leading to sealing failure, material leakage, and poor operational reliability. Utility Model Content

[0004] In view of the defects of the existing technology, the technical problem to be solved by this utility model is to provide a synchronous filtration device based on the output of a sand mill.

[0005] A synchronous filtration device based on the discharge of a sand mill includes a filter housing with an upper opening, a filter element assembly, and a top cover. The top cover is sealed to the upper opening of the filter housing. The filter element assembly is vertically arranged inside the filter housing. The upper end of the filter element assembly is fixedly connected to the top cover. The top of the top cover has a feed inlet that communicates with the internal cavity of the filter element assembly. The bottom of the filter housing has a discharge outlet.

[0006] The top cover and the filter housing are connected by a quick-lock assembly; the quick-lock assembly includes a plurality of limiting grooves arranged circumferentially on the inner side wall of the top cover, and a plurality of limiting shafts arranged circumferentially on the outer side wall of the filter housing. The limiting shafts are movably arranged in the limiting grooves one by one. The limiting groove includes a first vertical guide groove with a lower opening and an oblique guide groove connected to the upper end of the first vertical guide groove. The limiting shafts can move sequentially in the first vertical guide groove and the oblique guide groove. The filter housing is provided with a locking member that can lock the top cover from rotating.

[0007] In one embodiment, the filter element assembly is a three-layer composite cylindrical hollow structure, consisting of a coarse filtration anti-scratch layer, a precision filtration layer, and a thickened pressure-resistant layer from the inside out. After the material enters the internal cavity of the filter element assembly through the feed inlet, it passes through the coarse filtration anti-scratch layer, the precision filtration layer, and the thickened pressure-resistant layer from the inside out to complete the filtration. The filtered material then enters the cavity between the filter housing and the filter element assembly and is discharged from the bottom outlet. The three-layer structure of the filter element assembly is metallurgically bonded by high-temperature vacuum sintering.

[0008] In one embodiment, the filter element assembly has an open upper end and a closed lower end. The outer wall of the upper opening is provided with external threads, and the inner side of the upper cover is provided with matching internal threads. The filter element assembly is threadedly connected to the upper cover.

[0009] In one embodiment, the thickened pressure-resistant layer is a perforated stainless steel plate or a thick wire diameter sintered support mesh, the thickness and strength of which are higher than those of the inner coarse filter anti-scratch layer and precision filter layer.

[0010] In one embodiment, the feed inlet is coaxially disposed at the top center of the upper cover, and the discharge outlet is coaxially disposed at the bottom center of the filter housing, so that the upper cover and the filter housing are combined to form a straight-through flow channel structure with top inlet and bottom outlet.

[0011] In one embodiment, the locking member includes a limiting ring that is elastically and movably sleeved on the outside of the filter housing. The upper side of the limiting ring is provided with a plurality of first teeth evenly distributed along the circumference, and the lower side of the upper cover is provided with a plurality of second teeth evenly distributed along the circumference. The first teeth and the second teeth mesh with each other.

[0012] In one embodiment, a second vertical guide groove with an upper opening is provided on the circumferential side of the limiting ring, and a limiting screw is inserted into the outer wall of the filter housing through a threaded connection. The limiting screw is located in the second vertical guide groove. A flange is provided on the outer wall of the filter housing below the limiting ring, and a spring abuts against the flange and the limiting ring.

[0013] In one embodiment, a base is fixedly provided at the bottom of the filter housing, and several movable pulleys are installed below the base.

[0014] In summary, the advantages of this utility model over the prior art are:

[0015] This utility model device is directly connected to the discharge end of the sand mill, and the material is filtered immediately upon discharge, eliminating the intermediate transfer and conveying process, preventing secondary agglomeration of fine materials, realizing integrated continuous operation of grinding and filtration, and greatly shortening the production cycle.

[0016] Furthermore, the filter element adopts a three-layer structure of coarse filtration for scratch prevention, precision filtration, and thickened pressure resistance. The layered structure provides protection, filtration, and support, solving the problems of easy breakage, insufficient precision, and poor pressure resistance of traditional filter elements. This effectively extends the service life. At the same time, it abandons the traditional external inlet and internal outlet filtration method, fundamentally solving the problems of material accumulation in the filter element cavity, incomplete discharge, and material drying and contamination.

[0017] Furthermore, it adopts a quick-release detachable sealing connection, which allows for rapid opening and closing of the top cover and replacement of the filter element without the need for special tools, significantly reducing equipment downtime for maintenance and lowering labor costs. Attached Figure Description

[0018] Fig. 1 This is a cross-sectional view of a synchronous filtration device for sand mill discharge in one embodiment of the present invention;

[0019] Fig. 2 A partial exploded view of a synchronous filtration device for sand mill discharge in one embodiment of this utility model;

[0020] Fig. 3 A perspective view of a synchronous filtration device for the discharge of a sand mill in one embodiment of this utility model. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0022] like Figs. 1 to 3 The present invention preferably provides a synchronous filtration device based on the discharge of a sand mill, comprising a filter housing 1 with an upper opening, a filter element assembly 2, and a top cover 3. The top cover 3 is sealed to the upper opening of the filter housing 1. The filter element assembly 2 is vertically disposed inside the filter housing 1, and the upper end of the filter element assembly 2 is fixedly connected to the top cover 3. The top of the top cover 3 has a feed inlet 4, which communicates with the internal cavity of the filter element assembly 2. The bottom of the filter housing 1 has a discharge outlet 5. The filter element assembly 2 is a three-layer composite cylindrical hollow structure, consisting of a coarse filtration anti-scratch layer 6, a precision filtration layer 7, and a thickened pressure-resistant layer 8 from the inside out. After the material enters the internal cavity of the filter element assembly 2 through the feed inlet 4, it passes through the coarse filtration anti-scratch layer 6, the precision filtration layer 7, and the thickened pressure-resistant layer 8 from the inside out to complete filtration. The filtered material enters the cavity between the filter housing 1 and the filter element assembly 2 and is discharged from the bottom discharge outlet 5.

[0023] The feed inlet of this device can be sealed to the discharge outlet of the sand mill through a rigid pipe or a sanitary hose without altering the structure of the sand mill itself. After the pipeline is connected, the material is directly transported into the filter using the discharge pressure of the sand mill itself. The entire pipeline is sealed and leak-free. Pressure gauges and pressure relief valves can be installed on the connecting pipeline to work with the overpressure protection built into the sand mill, ensuring that the system pressure is controllable under synchronous filtration conditions.

[0024] Specifically, during operation, the slurry ground by the sand mill enters the hollow inner cavity of the filter element assembly through the feed inlet. Driven by the discharge pressure of the sand mill, the material passes through the coarse filter anti-scratching layer, the precision filter layer, and the thickened pressure-resistant layer from the inside out. The coarse filter anti-scratching layer intercepts large particles of slag, the precision filter layer achieves accurate screening of the material, and the thickened pressure-resistant layer provides pressure protection. After filtration, the filtrate enters the annular cavity between the filter housing and the filter element assembly, and is discharged outward from the discharge port at the bottom of the housing under the combined action of pressure and gravity, directly completing the synchronous filtration of the sand mill output.

[0025] Furthermore, the three-layer structure of the filter element assembly 2 is metallurgically bonded by high-temperature vacuum sintering.

[0026] Specifically, the three layers of filter material in the filter element assembly—the coarse anti-scratch layer, the precision filtration layer, and the thickened pressure-resistant layer—are metallurgically bonded through a high-temperature vacuum sintering process. The metal matrix is ​​fused between the layers, eliminating adhesive gaps and mechanical pressing gaps. During filtration, high-pressure materials will not flow or leak between the layers. Under regeneration cleaning conditions such as pulse backflushing, high-pressure rinsing, ultrasonic cleaning, and chemical immersion, the layers will not delaminate or crack, ensuring the filter element's pressure resistance and washability.

[0027] Furthermore, the filter element assembly 2 has an open upper end and a closed lower end, with external threads on the outer wall of its upper opening and matching internal threads on the inner side of the upper cover 3, and the filter element assembly 2 is threadedly connected to the upper cover 3.

[0028] Specifically, when maintenance is required, the filter element assembly can be removed from the top cover by unscrewing the threads after opening the top cover; during assembly, the filter element is tightened to the top cover, and then the top cover and the filter element are installed into the filter housing as a whole, achieving quick installation and removal of the filter element.

[0029] Furthermore, the thickened pressure-resistant layer 8 is a perforated stainless steel plate or a thick wire diameter sintered support mesh, and its structural thickness and strength are higher than those of the inner coarse filter anti-scratch layer 6 and precision filter layer 7.

[0030] Specifically, the thickness of the thickened pressure-resistant layer and the overall structural strength are higher than those of the inner coarse filter anti-scratch layer and precision filter layer. When the material is filtered from the inside to the outside of the filter element, the internal pressure of the filter element will drive the filter element to expand radially outward. The outermost thickened pressure-resistant layer bears this expansion load, constrains the radial deformation of the filter element, protects the inner precision filter layer from bulging and tearing, and improves the ability of the entire filter element to withstand the pressure fluctuations of the sand mill discharge.

[0031] Furthermore, the feed inlet 4 is coaxially disposed at the top center of the upper cover 3, and the discharge outlet 5 is coaxially disposed at the bottom center of the filter housing 1, so that the upper cover 3 and the filter housing 1 are combined to form a straight-through flow channel structure with top inlet and bottom outlet.

[0032] Specifically, the slurry enters the filter element cavity from top to bottom, and after filtration, the filtrate flows downward to the bottom of the shell and is discharged from the outlet. After filtration is completed and the machine is stopped, the material in the filter element cavity and the shell cavity can all flow downward by gravity. No residual material will accumulate in the shell and the filter element, and no manual additional material discharge operation is required.

[0033] Furthermore, the upper cover 3 and the filter housing 1 are connected in a detachable sealed manner through a quick-lock assembly 9.

[0034] Specifically, a quick-clamp assembly is used to achieve a detachable and sealed connection between the top cover and the filter housing. Unlike flange bolt fastening, the quick-clamp assembly does not require a large number of bolts to be tightened one by one. It can quickly complete the compression and sealing between the top cover and the housing, as well as quick opening, which facilitates quick opening of the cover, removal of the top cover and filter element assembly, and carrying out filter element replacement and offline cleaning operations.

[0035] Furthermore, the fast card assembly 9 includes several limiting grooves arranged circumferentially on the inner side wall of the upper cover 3, and several limiting shafts 10 are arranged circumferentially on the outer side wall of the filter housing 1. The limiting shafts 10 are movably arranged in the limiting grooves one by one. The limiting groove includes a first vertical guide groove 11 with a lower opening and an oblique guide groove 12 connected to the upper end of the first vertical guide groove 11. The limiting shafts 10 can move sequentially in the first vertical guide groove 11 and the oblique guide groove 12. The filter housing 1 is provided with a locking member 13 that can lock the upper cover 3 to rotate.

[0036] Specifically, during assembly, the top cover is placed downwards, and the limiting shaft of the housing moves downwards into position along the first vertical guide groove; then the top cover is rotated, and the limiting shaft slides into the inclined guide groove; the inclined surface of the inclined guide groove drives the top cover to press downwards, achieving a tight seal between the top cover and the end face of the filter housing; the locking component circumferentially locks the top cover, preventing the top cover from rotating in the opposite direction, and preventing the limiting shaft from retracting from the inclined guide groove to the first vertical guide groove under pressure and vibration conditions, thus preventing the top cover from loosening.

[0037] A sealing ring is provided on the inside of the top cover to abut against the filter housing.

[0038] Furthermore, the locking member 13 includes a limiting ring 14 that is elastically and movably sleeved on the outside of the filter housing 1. The upper side of the limiting ring 14 is provided with a plurality of first teeth 15 evenly distributed along the circumference, and the lower side of the upper cover 3 is provided with a plurality of second teeth 16 evenly distributed along the circumference. The first teeth 15 and the second teeth 16 mesh with each other.

[0039] Specifically, after the top cover is rotated into position and pressed into a seal, the limiting ring moves upward under the drive of elastic force, causing the first tooth and the second tooth to mesh with each other. The meshing of the teeth restricts the relative circumferential rotation between the top cover and the limiting ring, thereby locking the top cover from circumferential rotation. When it is necessary to unlock and open the cover, press the limiting ring downward, the teeth disengage, the circumferential lock is released, and the top cover can be rotated in the opposite direction to open.

[0040] Furthermore, the limiting ring 14 has a second vertical guide groove 17 with an upper opening on its circumference. The outer wall of the filter housing 1 is threadedly connected to a limiting screw 18, which is located in the second vertical guide groove 17. The outer wall of the filter housing 1 and below the limiting ring 14 is provided with a flange 19, and a spring 20 abuts between the flange 19 and the limiting ring 14.

[0041] Specifically, the limiting screw extends into the second vertical guide groove to limit the maximum upward and downward stroke of the limiting ring and prevent it from falling off the housing. The flange is located below the limiting ring, and the spring abuts between the flange and the limiting ring. The spring continuously applies an upward elastic force to the limiting ring, pushing it upward under normal conditions to keep the first and second teeth continuously engaged and locked. When the limiting ring is manually pressed down, the spring is compressed, the teeth separate, and the locking is achieved. After the hand is released, the spring rebounds, and the limiting ring automatically resets and re-enters the locked state.

[0042] Furthermore, a base 21 is fixedly provided at the bottom of the filter housing 1, and several movable pulleys 22 are installed below the base 21.

[0043] Specifically, the entire weight of the filtration unit is borne by the base. With the help of movable pulleys, the operator can easily move the entire filtration unit to adapt to different work positions of the sand mill, improving the flexibility of the equipment layout on site.

[0044] The foregoing has shown and described the basic principles and main features of this utility model, as well as its advantages. 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 illustrative of 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 synchronous filtration device based on the discharge of a sand mill, characterized in that: The filter housing includes a filter housing (1) with an upper opening, a filter element assembly (2), and a top cover (3). The top cover (3) is sealed to the upper opening of the filter housing (1). The filter element assembly (2) is vertically disposed inside the filter housing (1). The upper end of the filter element assembly (2) is fixedly connected to the top cover (3). The top of the top cover (3) has a feed inlet (4) that communicates with the internal cavity of the filter element assembly (2). The bottom of the filter housing (1) has a discharge outlet (5). The top cover (3) and the filter housing (1) are connected by a quick-clamp assembly (9). The fast card assembly (9) includes several limiting grooves arranged along the circumference on the inner side wall of the upper cover (3). The outer side wall of the filter housing (1) is provided with several limiting shafts (10) along the circumference. The limiting shafts (10) are movably arranged in the limiting grooves one by one. The limiting groove includes a first vertical guide groove (11) with a lower opening and an oblique guide groove (12) connected to the upper end of the first vertical guide groove (11). The limiting shafts (10) can move in the first vertical guide groove (11) and the oblique guide groove (12) in sequence. The filter housing (1) is provided with a locking member (13) that can lock the upper cover (3) to rotate.

2. The synchronous filtration device based on the discharge of a sand mill according to claim 1, characterized in that: The filter element assembly (2) is a three-layer composite cylindrical hollow structure, consisting of a coarse filter anti-scratch layer (6), a precision filter layer (7), and a thickened pressure-resistant layer (8) from the inside out. After the material enters the internal cavity of the filter element assembly (2) through the feed port (4), it passes through the coarse filter anti-scratch layer (6), the precision filter layer (7), and the thickened pressure-resistant layer (8) from the inside out to complete the filtration. After filtration, the material enters the cavity between the filter housing (1) and the filter element assembly (2) and is discharged from the bottom outlet (5). The three-layer structure of the filter element assembly (2) is formed by high-temperature vacuum sintering to form a metallurgical bond.

3. The synchronous filtration device based on the discharge of a sand mill according to claim 1, characterized in that: The filter element assembly (2) has an open top and a closed bottom. The outer wall of the upper opening is provided with an external thread, and the inner side of the upper cover (3) is provided with a matching internal thread. The filter element assembly (2) is threadedly connected to the upper cover (3).

4. The synchronous filtration device based on the discharge of a sand mill according to claim 2, characterized in that: The thickened pressure-resistant layer (8) is a perforated stainless steel plate or a thick wire diameter sintered support mesh, and its structural thickness and strength are higher than those of the inner coarse filter anti-scratch layer (6) and precision filter layer (7).

5. The synchronous filtration device based on the discharge of a sand mill according to claim 1, characterized in that: The feed inlet (4) is coaxially located at the top center of the upper cover (3), and the discharge outlet (5) is coaxially located at the bottom center of the filter housing (1), so that the upper cover (3) and the filter housing (1) are combined to form a straight-through flow channel structure with the upper inlet and the lower outlet.

6. The synchronous filtration device based on the discharge of a sand mill according to claim 1, characterized in that: The locking member (13) includes a limiting ring (14) that is elastically and movable on the outside of the filter housing (1). The upper side of the limiting ring (14) is provided with a plurality of first teeth (15) evenly distributed along the circumference, and the lower side of the upper cover (3) is provided with a plurality of second teeth (16) evenly distributed along the circumference. The first teeth (15) and the second teeth (16) mesh with each other.

7. A synchronous filtration device based on sand mill discharge as described in claim 6, characterized in that: The limiting ring (14) has a second vertical guide groove (17) with an upper opening on its circumference. The outer wall of the filter housing (1) is connected to a limiting screw (18) by a threaded fit. The limiting screw (18) is located in the second vertical guide groove (17). The outer wall of the filter housing (1) and below the limiting ring (14) is provided with a flange (19). A spring (20) abuts between the flange (19) and the limiting ring (14).

8. The synchronous filtration device based on the discharge of a sand mill according to claim 1, characterized in that: The bottom of the filter housing (1) is fixedly provided with a base (21), and several movable pulleys (22) are installed below the base (21).

Images