A pressurized filter with filter cloth assembly capable of quick replacement and a method for replacing the same

Abstract

The application relates to the technical field of filtering equipment, in particular to a pressurized filter with filter cloth assemblies capable of being quickly replaced and a replacement method thereof, which comprises a filter fan fixing frame, filter screens are installed between the skeletons of the filter fan fixing frame, a rebound structure is installed at the end of the filter fan fixing frame, a clamping groove is arranged at the side of the filter screen, one end of the rebound structure is installed on the filter fan fixing frame through a spring, a movable fixing rod is arranged at the top of the rebound structure, the top end of the movable fixing rod is installed on the filter fan fixing frame, a clamping column is installed at one side of the bottom of the rebound structure, and the clamping column is in clamping and matching connection with the side clamping groove of the filter screen. The application is designed to design the filter disc of the pressurized filter from the structure, install the rebound structure on the filter disc, and design the filter cloth in blocks. When the filter cloth is damaged, the filter cloth is monitored through a filter plate monitoring system, the replacement of the damaged filter cloth is facilitated, the safety hidden danger caused by the replacement of the filter fan is eliminated, and the work efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of filtration equipment technology, and more specifically, to a pressure filter with a quick-change filter cloth assembly and a replacement method thereof. Background Technology

[0002] A pressure filter consists of a disc filter placed within a closed pressure chamber. A scraper conveyor is located below the feed chute of the disc filter, and a discharge device is installed at the head of the machine. The suspension to be filtered is fed into the filter chamber by a feed pump. Compressed air at a certain pressure is introduced into the pressure chamber. A pressure difference is created on the filter discs through a distribution valve and an air-liquid separator open to the atmosphere. Under the pressure within the pressure chamber, the liquid in the chamber is discharged through the filter medium immersed in the suspension, while solid particles are collected on the filter medium to form a filter cake. As the filter discs rotate, the filter cake is dried to reduce moisture content and then discharged through the distribution valve's discharge area onto the scraper conveyor, which collects it in the discharge device. This process continues continuously. When a certain amount is reached, the discharge device intermittently discharges the filter cake out of the machine. The entire process is automated.

[0003] Filter fans are a common filter medium in pressure filters. The proper functioning of many filtration devices depends not only on the suitability of the machine itself but also, to a large extent, on the selection of the filter cloth. Filter fans, which separate feed suspensions due to pressure differential, are easily damaged; improper installation during use can also shorten their lifespan. Currently, in most domestic mines, filter cloths are generally made of fiber or nylon-based organic materials, which typically have a relatively short service life and are frequently replaced due to damage, resulting in a significant workload for workers.

[0004] The filter screen needs to be installed on the filter panels, and multiple filter panels are assembled into a filter cloth. In mines, a single filter machine typically has hundreds of filter panels. When manufacturing the filter cloth, the filter panels are first made, and then multiple filter panels are assembled and fixed to form a circular filter cloth. Traditional filter cloth installation requires workers to press and connect them on-site, resulting in a cluttered environment and numerous limitations. Furthermore, the filter panels can interfere with each other. In addition, the condition of the filter cloth cannot be monitored in real time; damage is often only discovered when the filter cloth is severely damaged, posing safety hazards and affecting operational quality. Summary of the Invention

[0005] The purpose of this invention is to provide a pressure filter with a quick-replacement filter cloth assembly and a replacement method thereof, in order to solve the problems mentioned in the background art, such as the need for workers to press the filter cloth on-site, the relatively messy on-site equipment, the many limiting factors in the installation of the filter cloth, and the mutual influence between the filter panels.

[0006] To achieve the above objectives, on the one hand, the present invention provides a pressure filter with a quick-change filter cloth assembly, including a filter fan mounting frame, a filter screen installed between the frame members of the filter fan mounting frame, a spring-loaded structure installed at the end of the filter fan mounting frame, a slot provided on the side of the filter screen, one end of the spring-loaded structure being mounted on the filter fan mounting frame by a spring, a movable fixing rod provided at the top of the spring-loaded structure, the top end of the movable fixing rod being mounted on the filter fan mounting frame, a locking post installed on one side of the bottom of the spring-loaded structure, the locking post engaging with the slot on the side of the filter screen, and the interior of the spring-loaded structure having slides A, B, C, D, and E arranged sequentially. When the filter screen is pressed, the bottom end of the movable fixing rod can move along slides A, B, and C, and is locked at the top end of slide C by the spring. When the filter screen is pressed further, the bottom end of the movable fixing rod can slide out along slides C, D, and E.

[0007] Preferably, the filter fan mounting bracket and the filter screen form a filter disc.

[0008] Preferably, the filter fan mounting bracket has a groove design, and the filter screen is installed in the groove of the filter fan mounting bracket, with the two sides limited by the frame of the filter fan mounting bracket.

[0009] Preferably, the bottom end of the movable fixing rod is equipped with a roller.

[0010] Preferably, a filter fan frame is installed on the side of the filter screen.

[0011] Preferably, the internal slide of the rebound structure is a ramp, and the top of slide E is provided with a step, so that the upper bottom surface of slide E is higher than the upper bottom surface of slide A. The middle of slide C is provided with a step, so that the height of the upper bottom surface of slide C is higher than the height of the upper bottom surface of slide D.

[0012] Preferably, the filter discs are installed sequentially at equal intervals inside the pressurization chamber of the device, a filter plate monitoring system is installed on the top of the filter discs, and sensor probes are provided on the sides of the filter discs.

[0013] On the other hand, the present invention also provides a method for replacing a pressure filter with a quickly replaceable filter cloth assembly, comprising the above-mentioned pressure filter with a quickly replaceable filter cloth assembly, including the following steps:

[0014] S1: First, install the filter screen in the filter fan mounting bracket to form a filter disc. The ends of the filter screen are fixed by a spring-loaded structure.

[0015] S2: When the filter screen is pressed, the bottom end of the movable fixing rod can move along slide A, slide B, and slide C, and is locked at the top of slide C by spring action, thus fixing the filter screen.

[0016] S3: Then install the filter disc in the pressure chamber of the device and it can be used. When the filter screen is damaged and needs to be replaced, the filter screen can be quickly removed.

[0017] S4: During disassembly, continue pressing the filter screen. The bottom end of the movable fixing rod can slide out along slide C, slide D, and slide E. The movable fixing rod will slide out from slide E through the spring and disengage from the spring-loaded structure. At this point, the filter screen can be easily removed and replaced.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] This pressure filter with a quick-replacement filter cloth assembly and its replacement method features a structurally designed filter disc. A spring-loaded structure is installed on the filter disc, and the filter cloth is segmented. When the filter cloth is damaged, a filter plate monitoring system monitors it, facilitating replacement and eliminating safety hazards associated with filter replacement, thus improving work efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is one of the structural schematic diagrams of the present invention;

[0022] Figure 3 This is a schematic diagram of the springback structure in this invention;

[0023] Figure 4 This is a schematic diagram of the filter screen in this invention;

[0024] Figure 5 This is a schematic diagram of the installation of the filter disc in this invention.

[0025] The meanings of the labels in the diagram are as follows:

[0026] 1. Filter fan mounting bracket; 2. Filter screen; 3. Rebound structure; 31. A slide rail; 32. B slide rail; 33. C slide rail; 34. D slide rail; 35. E slide rail; 36. Locking post; 4. Filter fan frame; 5. Spring; 6. Movable fixing rod; 61. Roller; 7. Filter plate monitoring system; 8. Sensor probe; 9. Filter disc; 10. Pressure chamber of the device. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] In the description of this invention, 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," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0029] This invention provides a pressure filter with a quick-change filter cloth assembly, such as... Figures 1-5 As shown, the device includes a filter fan mounting bracket 1. A filter screen 2 is installed between the frames of the filter fan mounting bracket 1 for filtration. A spring-loaded structure 3 is installed at the end of the filter fan mounting bracket 1 for quick installation of the filter screen 2. A slot is provided on the side of the filter screen 2. One end of the spring-loaded structure 3 is mounted on the filter fan mounting bracket 1 via a spring 5. A movable fixing rod 6 is provided at the top of the spring-loaded structure 3, and the top end of the movable fixing rod 6 is mounted on the filter fan mounting bracket 1. A locking post 36 is installed on one side of the bottom of the spring-loaded structure 3. The 6 engages with the side slot of the filter screen 2. The internal structure of the spring-loaded structure 3 is provided with slides A 31, B 32, C 33, D 34, and E 35 in sequence. When the filter screen 2 is pressed, the bottom end of the movable fixing rod 6 can move along slides A 31, B 32, and C 33, and is locked at the top of slide C 33 by the action of spring 5. When the filter screen 2 is pressed again, the bottom end of the movable fixing rod 6 can slide out along slides C 33, D 34, and E 35.

[0030] In this embodiment, the filter fan mounting bracket 1 and the filter screen 2 form a filter disc 9.

[0031] Specifically, the filter fan mounting bracket 1 has a groove design, and the filter screen 2 is installed in the groove of the filter fan mounting bracket 1. The filter screen 2 is fixed on both sides by the frame of the filter fan mounting bracket 1.

[0032] Furthermore, a roller 61 is installed at the bottom of the movable fixing rod 6. In actual production, since the filter screen 2 is mainly used for pressing and filtering fine sand particles, it may cause the slide to become clogged. Therefore, the movable fixing rod 6 is improved by modifying the tip of the movable fixing rod 6 into a roller structure to ensure that fine sand particles can enter the slide.

[0033] Furthermore, a filter fan frame 4 is installed on the side of the filter screen 2. The outer side of the filter fan frame 4 is clipped onto the frame of the filter fan fixing bracket 1 to ensure the positioning of the filter screen 2.

[0034] Furthermore, the internal slide of the rebound structure 3 is set as a slope, and the top of slide E 35 is provided with a step, so that the upper bottom surface of slide E 35 is higher than the upper bottom surface of slide A 31. The middle of slide C 33 is provided with a step, so that the height of the upper bottom surface of slide C 33 is higher than the height of the upper bottom surface of slide D 34. This allows the movable fixed rod 6 to slide only along the sequence of slide A 31, slide B 32, slide C 33, slide D 34, and slide E 35.

[0035] Furthermore, filter discs 9 are installed sequentially and at equal intervals within the pressure chamber 10 of the device. A filter plate monitoring system 7 is installed on the top of the filter discs 9, and sensor probes 8 are installed on the sides of the filter discs 9. The sensor probes 8 of the filter plate monitoring system 7 are located above the filter discs 9. When the filter discs 9 rotate, the sensor probes 8 can monitor the real-time status of the entire filter cloth. When the filter screen 2 is damaged, the processor connected to the sensor probes 8 controls the filter discs 9 to stop operating, facilitating the replacement of individual filter units. The basic circuit of the filter plate monitoring system 7 consists of an oscillator, a detection coil signal output circuit, an amplifier, a signal processor, a display, and a power supply. When an alternating current is passed through the excitation coil in the sensor probes 8, eddy currents and corresponding magnetic fields are induced in the conductor. When the sensor probes 8 detect that the filter cloth is damaged, the feeding stops, the damaged filter screen 2 rotates to the docking position and stops, and by pressing the filter screen 2, the movable fixing rod 6 is moved to pop it out. After the damaged filter screen 2 is removed, a new filter screen 2 is replaced. Finally, after the sensor probes 8 detect that the filter discs 9 are undamaged, the system continues to operate.

[0036] It is worth noting that eddy current detection involves bringing a conductor close to a coil carrying alternating current. The coil establishes an alternating magnetic field, which passes through the conductor and induces electromagnetic induction, creating eddy currents within the conductor. These eddy currents also generate their own magnetic fields, altering the strength of the original magnetic field and consequently changing the coil voltage and impedance. For the stainless steel wire tailings filter 2, the tailings themselves are not conductive and have little impact on the eddy current field. However, when the stainless steel wire filter 2 breaks or becomes damaged, the change in eddy currents will cause a change in the detection coil voltage and impedance. Based on this change, the extent of the damage to the filter 2 can be indirectly determined.

[0037] On the other hand, the present invention also provides a method for replacing the filter cloth assembly of a pressure filter with quick replacement capability, comprising the following steps:

[0038] S1: First, install the filter screen 2 in the filter fan mounting bracket 1 to form a filter disc 9. The end of the filter screen 2 is fixed by the spring structure 3.

[0039] S2: When the filter screen 2 is pressed, the bottom end of the movable fixing rod 6 can move along slide A 31, slide B 32 and slide C 33, and is locked at the top of slide C 33 by the action of spring 5, so that the filter screen 2 is fixed.

[0040] S3: Then install the filter disc 9 into the pressure chamber 10 of the device, and it can be used. When the filter screen 2 is damaged and needs to be replaced, the filter screen 2 can be quickly disassembled.

[0041] S4: During disassembly, continue pressing the filter screen 2. The bottom end of the movable fixing rod 6 can slide out along slide C 33, slide D 34, and slide E 35. The movable fixing rod 6 will slide out from slide E 35 and disengage from the spring structure 3 through the action of spring 5. At this time, the filter screen 2 can be easily removed and replaced.

[0042] Finally, it should be noted that the electronic components in the filter plate monitoring system 7, sensor probe 8, etc. in this embodiment are all general standard parts or parts known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods. In the idle part of this device, all the above-mentioned electrical components are connected by wires. The specific connection method should refer to the working order between each electrical component in the above working principle to complete the electrical connection. They are all technologies known in the art.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention 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 invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pressure filter with a quick-change filter cloth assembly, comprising a filter fan mounting bracket (1), characterized in that: A filter screen (2) is installed between the frames of the filter fan mounting bracket (1). A spring-loaded structure (3) is installed at the end of the filter fan mounting bracket (1). A slot is provided on the side of the filter screen (2). One end of the spring-loaded structure (3) is installed on the filter fan mounting bracket (1) by a spring (5). A movable fixing rod (6) is provided at the top of the spring-loaded structure (3). The top of the movable fixing rod (6) is installed on the filter fan mounting bracket (1). A locking post (36) is installed on one side of the bottom of the spring-loaded structure (3). The locking post (36) engages with the slot on the side of the filter screen (2). The spring structure (3) is provided with slides A (31), B (32), C (33), D (34), and E (35) in sequence. When the filter screen (2) is pressed, the bottom end of the movable fixing rod (6) can move along slides A (31), B (32), and C (33) and is locked at the top of slide C (33) by the action of spring (5). When the filter screen (2) is pressed again, the bottom end of the movable fixing rod (6) can slide out along slides C (33), D (34), and E (35). The filter fan fixing frame (1) and the filter screen (2) form a filter disc (9); the filter discs (9) are installed in the device pressurization chamber (10) at equal intervals; a filter plate monitoring system (7) is installed on the top of the filter disc (9); and a sensor probe (8) is provided on the side of the filter disc (9). The internal slide of the rebound structure (3) is set as a slope. The top of the E slide (35) is provided with a step, so that the upper bottom surface of the E slide (35) is higher than the upper bottom surface of the A slide (31). The middle of the C slide (33) is provided with a step, so that the height of the upper bottom surface of the C slide (33) is higher than the height of the upper bottom surface of the D slide (34).

2. The pressure filter with quick-change filter cloth assembly according to claim 1, characterized in that: The filter fan mounting bracket (1) has a groove design, and the filter screen (2) is installed in the groove of the filter fan mounting bracket (1), with the two sides limited by the frame of the filter fan mounting bracket (1).

3. The pressure filter with quick-change filter cloth assembly according to claim 1, characterized in that: The bottom end of the movable fixing rod (6) is equipped with a roller (61).

4. The pressure filter with quick-change filter cloth assembly according to claim 1, characterized in that: The filter screen (2) has a filter fan frame (4) installed on its side.

5. A method for replacing the filter cloth assembly of a pressure filter with quick replacement capability, comprising the pressure filter with quick replacement filter cloth assembly as described in any one of claims 1-4, characterized in that: Includes the following steps: S1: First, install the filter screen (2) in the filter fan mounting bracket (1) to form a filter disc (9). The end of the filter screen (2) is fixed by the spring structure (3). S2: When the filter screen (2) is pressed, the bottom end of the movable fixing rod (6) can move along slide A (31), slide B (32) and slide C (33), and is locked at the top of slide C (33) by the action of spring (5), so that the filter screen (2) is fixed. S3: Then install the filter disc (9) in the pressure chamber (10) of the device and it can be used. When the filter screen (2) is damaged and needs to be replaced, the filter screen (2) can be quickly disassembled. S4: When disassembling, continue to press the filter screen (2). The bottom end of the movable fixing rod (6) can slide out along the C slide (33), D slide (34), and E slide (35). The movable fixing rod (6) will slide out from the E slide (35) through the action of the spring (5) and disengage from the spring-loaded structure (3). At this time, the filter screen (2) can be removed smoothly and replaced.

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