A filter plate with uniform feeding

Abstract

This utility model discloses a filter plate with uniform feeding, including a filter plate body, a filter frame, an elastic element, and a drain pipe assembly. The filter frame is located on one side of the filter plate body, and an elastic element is provided between the filter frame and the filter plate body. The filter plate body has a first feed hole penetrating the thickness of the plate body, located below the center of the filter plate body. Several filtrate holes are provided on both sides of the filter plate body, and several drain holes are provided on the outer periphery of the filter plate body. The filtrate holes are connected to the drain holes via pipes. A drain pipe assembly is installed on the filter plate body, and the feed end of the drain pipe assembly is connected to several drain holes. Filter cloths are installed on both sides of the filter plate body, covering the filtrate holes. By setting the feed hole of the filter plate slightly below the center of the filter plate body, the material impact during feeding achieves tumbling, resulting in simultaneous filling of multiple filter chambers. This has the advantages of ensuring uniform feeding in each filter chamber, avoiding uneven filter cake thickness, improving filtration efficiency, and extending equipment lifespan.

Description

Technical Field

[0001] This utility model relates to the field of plate and frame filter press technology, and in particular to a filter plate with uniform feeding. Background Technology

[0002] Filter presses, as highly efficient solid-liquid separation equipment, are widely used in chemical, pharmaceutical, metallurgical, ceramic, and silicate industries, and also play an important role in municipal and industrial sludge dewatering. Their typical working process is as follows: multiple filter plates are arranged side-by-side to form a series of continuous filter chambers; sludge enters the system through the feed inlet on the end filter plate and sequentially fills each filter chamber. Then, by applying external pressure, the material in the filter chamber is squeezed, the liquid passes through the filter cloth and is discharged, while the solid matter is retained in the filter chamber, ultimately forming a solid filter cake, thus achieving solid-liquid separation.

[0003] Currently, most common filter press plate structures employ a design with a central feed inlet. In this structure, sludge enters the filter chamber from the center, and the sludge must fill to at least the feed inlet before overflowing into adjacent chambers. This can lead to uneven feeding: the initial chambers receive more sludge, while the last chambers receive less, resulting in varying sludge volumes across different chambers. This unevenness further contributes to inconsistent filter cake thickness during the filtration process, with the bottom being thicker and the top thinner.

[0004] Uneven filter cake thickness can cause an imbalance in the pressure distribution across different parts of the filter plates in the entire filter press system. Some filter plates are prone to deformation or damage due to localized stress concentration, which not only affects the service life of the equipment but also reduces filtration efficiency and operational stability. Utility Model Content

[0005] In response to the problems raised in the background art, the purpose of this utility model is to propose a filter plate with uniform feeding, which solves the problem that the existing filter frame is prone to uneven feeding and uneven filter cake thickness due to feeding in the center.

[0006] To achieve this objective, the present invention adopts the following technical solution: A filter plate with uniform feeding includes a filter plate body, a filter frame, several elastic elements, and a drain pipe assembly. The filter frame is disposed on one side of the filter plate body, and a plurality of elastic elements are provided between the filter frame and the filter plate body; The filter plate body is provided with a first feed hole that penetrates the thickness of the plate body, and the first feed hole is located below the center of the filter plate body; The filter plate body has several filtrate holes on both sides and several drain holes on the outer periphery of the filter plate body. The filtrate holes are connected to the drain holes through pipes. The filter plate body is equipped with the drain pipe assembly, and the feed end of the drain pipe assembly is connected to several drain holes. Filter cloths are installed on both sides of the filter plate body, and the filter cloths cover the filtrate holes.

[0007] Preferably, the first feed hole is located between the center of the filter plate body and the line connecting the bottom of the filter plate body, and the first feed hole is located near the bottom of the filter plate body.

[0008] Preferably, the filter plate body is further provided with a second feed hole that penetrates the thickness of the plate body, and the second feed hole is located at the center of the filter plate body; The first feed hole and the second feed hole have the same shape and size.

[0009] Preferably, the two ends of the first feed hole and the two ends of the second feed hole are respectively provided with feed port inserts, and the feed port inserts are detachably equipped with sealing members, which are used to block the first feed hole and / or the second feed hole.

[0010] Preferably, the filter cloth is installed on one side of the filter plate body by a cloth pressing assembly, the cloth pressing assembly including a feed inlet cloth pressing ring and a plurality of cloth pressing locking parts; The feed inlet pressure ring is detachably installed on the feed inlet insert, the filter cloth is disposed between the feed inlet pressure ring and the feed inlet insert, and the filter cloth does not cover the first feed hole and / or the second feed hole; A plurality of the cloth pressing locking components are detachably installed on both sides of the filter plate body. The plurality of cloth pressing locking components are equally spaced along one side of the filter plate body. The filter cloth is disposed between the plurality of cloth pressing locking components and one side of the filter plate body. The filter cloth covers a plurality of the filtrate holes on the same side of the filter plate body.

[0011] Preferably, the elastic element is a nitrogen cylinder; The cylinder body of the nitrogen cylinder is installed on one side of the filter plate body, and the piston rod of the nitrogen cylinder is installed and connected to the filter frame.

[0012] Preferably, the elastic element is a telescopic spring; One end of the telescopic spring is installed and connected to the filter plate body, and the other end of the telescopic spring is installed and connected to the filter frame.

[0013] Preferably, the discharge end of the drainage pipe assembly is provided with a liquid discharge port and an air inlet, and the air inlet is connected to the purging equipment.

[0014] Preferably, it also includes two roller handles, which are symmetrically installed on both sides of the filter plate body and are rotatably mounted on the main beam of the filter press.

[0015] Compared with the prior art, one of the above technical solutions has the following beneficial effects: By setting the feed hole of the filter plate slightly below the center of the filter plate body, the material impact during the feeding process can achieve tumbling and the effect of simultaneous filling of multiple filter chambers. This effectively solves the problems of uneven feed in traditional filter plates, such as filter cake thickness differences, filter plate stress imbalance, and poor drainage. It has the advantages of ensuring uniform feed in each filter chamber, avoiding uneven filter cake thickness, improving filtration efficiency, and extending equipment life. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of one embodiment of the present utility model; Figure 2 This is a structural schematic diagram from another angle of one embodiment of the present invention; Figure 3 yes Figure 1 Exploded view; Figure 4 yes Figure 2 Exploded view; Figure 5 yes Figure 1 The left view; Figure 6 yes Figure 5 Sectional view of AA.

[0017] The filter plate body 1 includes a first feed hole 1011, a second feed hole 1012, a filtrate hole 102, a pipe 11, a feed inlet insert 12, a sealing element 13, a filter frame 2, an elastic element 3, a drain pipe assembly 4, a drain outlet 41, an air inlet 42, a feed inlet pressure ring 51, and a pressure lock 52. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0019] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", 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 utility model 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 utility model.

[0020] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," and "third" may explicitly or implicitly include one or more of that feature.

[0021] It should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] The following is in conjunction with the appendix Figures 1 to 6 The technical solution of this utility model will be further illustrated through specific implementation methods.

[0023] A filter plate with uniform feeding includes a filter plate body 1, a filter frame 2, several elastic elements 3 and a drainage pipe assembly 4; The filter frame 2 is disposed on one side of the filter plate body 1, and a plurality of elastic elements 3 are provided between the filter frame 2 and the filter plate body 1; The filter plate body 1 is provided with a first feed hole 1011 that penetrates the thickness of the plate body, and the first feed hole 1011 is located below the center of the filter plate body 1; The filter plate body 1 has a plurality of filtrate holes 102 on both sides and a plurality of drain holes 103 on the outer periphery of the filter plate body 1. The filtrate holes 102 are connected to the drain holes 103 through pipes 11. The filter plate body 1 is equipped with the drain pipe assembly 4, and the feed end of the drain pipe assembly 4 is connected to a plurality of the drain holes 103. Filter cloths are installed on both sides of the filter plate body 1, and the filter cloths cover the filtrate holes 102.

[0024] This invention provides a filter plate with uniform feeding, comprising a filter plate body 1, a filter frame 2, several elastic elements 3, and a drain pipe assembly 4. The filter frame 2 is located on one side of the filter plate body 1, and several elastic elements 3 are provided between the filter frame 2 and the filter plate body 1. The elastic elements 3 are telescopic mechanisms connecting the filter plate body 1 and the filter frame 2, which allow the distance between the filter frame 2 and the filter plate body 1 to automatically adjust with pressure changes, preventing rigid compression when the filter chamber contracts. Under the elastic force of the elastic elements 3, the filter frame 2 and the filter plate body 1 tend to move away from each other.

[0025] The filter plate body 1 is provided with a first feed hole 1011 that penetrates the thickness of the plate body. The first feed hole 1011 is located below the center of the filter plate body 1. The first feed hole 1011 refers to the feed through hole located slightly below the center of the filter plate body 1. Its position is chosen so that the material enters the filter chamber from a position slightly below the center and impacts the existing accumulated material in the filter chamber. In addition, by adjusting the first feed hole 1011 from its current position in the middle to a position slightly below the center of the filter plate, the material does not need to fill half of the filter chamber (filling the material to the height of the feed hole) before starting to fill the next filter chamber, thus enabling simultaneous filling of multiple filter chambers.

[0026] The filter plate body 1 has several filtrate holes 102 on both sides and several drain holes 103 on its outer periphery. The filtrate holes 102 are connected to the drain holes 103 via pipes 11. The filter plate body 1 is equipped with a drain pipe assembly 4, the inlet end of which is connected to the drain holes 103. Filter cloth is installed on both sides of the filter plate body 1, covering the filtrate holes 102. The connecting pipe 11 between the filtrate holes 102 and the drain holes 103 refers to a flow channel embedded inside the filter plate body 1. Specifically, it can be a pre-embedded metal pipe or an injection-molded flow channel, used to guide the filtered liquid from the surface of the filter cloth to the drain pipe assembly 4.

[0027] Specifically, when the material enters the filter chamber through the first feed hole 1011 at the bottom, the high-speed flowing material directly impacts the material layer already deposited at the bottom of the filter chamber, creating a forced tumbling and mixing effect. The elastic element 3 deforms during the filtration process, causing the distance between the filter frame 2 and the filter plate body 1 to gradually decrease as the filter cake thickens, maintaining continuous pressure on the material. The filtered liquid passes through the filter cloth on both sides and enters the filtrate holes, then collects through the internal pipe 11 to the outer peripheral drain hole 103, and is finally discharged through the drain pipe assembly 4. The position of the first feed hole 1011 at the bottom of the filter plate body 1 significantly reduces the liquid level difference between adjacent filter chambers, allowing multiple filter chambers to be filled with material simultaneously, eliminating the sequential filling defects of traditional structures.

[0028] Compared to existing technologies, traditional intermediate feeding methods require the filter chambers to be filled to the height of the inlet before overflowing into adjacent filter chambers, resulting in differences in the filling sequence. This invention achieves synchronous and uniform filling of materials in multiple filter chambers by changing the opening position of the first inlet hole 1011; moreover, when the material is poured into the filter chamber through the first inlet hole 1011, it creates an impact and tumbling effect on the already deposited material, which can reduce solid particle deposition, effectively prevent differences in thickness between different filter cakes, and improve filtration efficiency.

[0029] Furthermore, the first feed hole 1011 is located between the center of the filter plate body 1 and the line connecting the bottom of the filter plate body 1, and the first feed hole 1011 is located near the bottom of the filter plate body 1.

[0030] The line connecting the center and the bottom refers to the virtual connection line between the geometric center point of the filter plate body and the midpoint of the bottom edge. This position ensures that the material inlet is located in the lower space of the filter chamber, directly affecting the material accumulation area. "Close to the bottom" means that the vertical distance between the first feed hole 1011 and the bottom edge of the filter plate body 1 does not exceed one-quarter of the height of the filter plate body 1. This can be achieved by creating a through hole in the lower part of the filter plate body 1. This arrangement ensures that regardless of the state of the material entering the filter chamber (before it is filled), it will impact and tumble the material deposited at the bottom, preventing larger particles from settling at the bottom of the filter chamber and causing an uneven filter cake (thicker at the bottom and thinner at the top), which would easily damage the filter plate under pressure.

[0031] Specifically, when material enters the filter chamber through the first feed hole 1011 in the lower region, the material flow directly impacts the existing material layer at the bottom of the filter chamber, causing the material to tumble. This flow characteristic breaks the laminar flow state formed by feeding into the middle of the filter plate in traditional methods, forcing the material to generate turbulence within the filter chamber. Since the first feed hole 1011 is located at the bottom of the filter plate, when the material fills to the horizontal height of the first feed hole 1011, it can enter the adjacent filter chamber through the connecting channel without waiting for the current filter chamber to be completely filled. Multiple filter chambers form a parallel injection system through the lower connected feed channels, and the time difference of the material injection process in each filter chamber is compressed within the physical propagation time range of the material flow.

[0032] Furthermore, the filter plate body 1 is also provided with a second feed hole 1012 that penetrates the thickness of the plate body, and the second feed hole 1012 is located at the center of the filter plate body 1; The first feed hole 1011 and the second feed hole 1012 have the same shape and size.

[0033] The second feed hole 1012 refers to a through-hole located at the geometric center of the filter plate body 1, and can be implemented using the same cross-sectional structure as the first feed hole 1011. Specifically, while the first feed hole 1011 is provided at the lower part of the filter plate body 1, the second feed hole 1012 is opened parallel to it at the center of the filter plate, forming a dual feed channel, which allows different feed channels to be selected according to the properties of the material. In addition, when the material enters the filter chamber through the lower channel, the central channel can also simultaneously inject material into the filter chamber, and the fluid generated by the two feed holes creates a countercurrent effect in the filter chamber.

[0034] Furthermore, each of the two openings of the first feed hole 1011 and the two openings of the second feed hole 1012 is provided with a feed port insert 12. The feed port insert 12 is detachably equipped with a sealing member 13, which is used to block the first feed hole 1011 and / or the second feed hole 1012.

[0035] When it is necessary to switch the feeding mode, the operator removes the sealing piece 13 on the corresponding feed port insert 12 to open either the first feed port 1011 or the second feed port 1012. For example, when bottom feeding is required, only the first feed port 1011 remains open; when center feeding is required, only the second feed port 1012 remains open. Unused feed ports are completely sealed by the sealing piece 13 to prevent cross-contamination or channel blockage caused by material residue.

[0036] Furthermore, the filter cloth is installed on one side of the filter plate body 1 by a cloth pressing assembly, the cloth pressing assembly including a feed inlet cloth pressing ring 51 and a plurality of cloth pressing locking parts 52; The feed inlet pressing ring 51 is detachably installed on the feed inlet insert 12, and the filter cloth is disposed between the feed inlet pressing ring 51 and the feed inlet insert 12. The filter cloth does not cover the first feed hole 1011 and / or the second feed hole 1012. A plurality of the cloth pressing locking members 52 are detachably installed on both sides of the filter plate body 1. The plurality of cloth pressing locking members 52 are equally spaced along one side of the filter plate body 1. The filter cloth is disposed between the plurality of cloth pressing locking members 52 and one side of the filter plate body 1. The filter cloth covers a plurality of the filtrate holes 102 on the same side of the filter plate body 1.

[0037] The feed inlet pressing ring 51 is an annular fixing component that forms a detachable connection with the feed inlet insert 12. Its annular structure ensures that the filter cloth is uniformly pressed at the edge of the feed hole, preventing filter cloth fibers from entering the feed hole. The pressing locking component 52 is a planar fixing device that forms a continuous sealing line by locking points evenly distributed along the surface of the filter plate body 1, eliminating the gap between the filter cloth and the filtrate hole 102.

[0038] Specifically, the filter cloth installation process is divided into two areas: in the feed hole (first feed hole or second feed hole) area, the filter cloth opening position is precisely defined by the mating structure of the feed inlet pressing ring 51 and the feed inlet insert 12, preventing cloth offset from causing blockage of the feed channel; in the filtrate hole area, uniform pressure is applied by the pressing locking member 52 to make the filter cloth adhere to the surface of the filter plate body 1 without gaps. This regional fixing method ensures both the unobstructed feed path and the sealing integrity of the filtrate collection system.

[0039] Furthermore, the elastic element 3 is a nitrogen cylinder; The cylinder body of the nitrogen cylinder is installed on one side of the filter plate body 1, and the piston rod of the nitrogen cylinder is installed and connected to the filter frame 2.

[0040] During operation, when the pressure increases and the material is filtered, the filter frame 2 is squeezed by the adjacent filter plates, causing it to tend to displace. At this time, the piston rod of the nitrogen cylinder moves axially under hydraulic pressure, and the nitrogen gas inside the cylinder is compressed, forming a reverse force. Due to the compressibility and nonlinear stiffness characteristics of nitrogen gas, it can absorb the impact load transmitted by the filter frame 2 and convert it into gas potential energy for storage. When the external pressure fluctuates, the nitrogen cylinder achieves adaptive control of the distance between the filter frame 2 and the filter plate body 1 by adjusting the piston stroke in real time, thereby maintaining the dynamic balance of the pressure distribution in the filter chamber.

[0041] Furthermore, the elastic element 3 is a telescopic spring; One end of the telescopic spring is installed and connected to the filter plate body 1, and the other end of the telescopic spring is installed and connected to the filter frame 2.

[0042] A telescopic spring is a helical mechanical component with axial elastic deformation capability. Specifically, it can be made of carbon spring steel or stainless steel into a cylindrical helical compression spring. This component forms a force transmission path with the filter plate body 1 and the filter frame 2 respectively through a fixed connection at both ends, and produces linear deformation when the pressure in the filter chamber changes.

[0043] Furthermore, the discharge end of the drain pipe assembly 4 is provided with a liquid discharge port 41 and an air inlet 42, and the air inlet 42 is connected to the purging equipment.

[0044] Drain port 41 is a channel for discharging filtrate, which can be implemented using a metal pipe with a flange connection. Its function is to guide the liquid out and maintain pressure balance within the pipeline. Air inlet 42 is an interface for introducing external gas, which can be implemented using a pipe with a quick connector. Its function is to connect to purging equipment to input high-pressure gas, thereby removing residual material from the pipeline. Purging equipment refers to a device that provides high-pressure gas, which can be implemented using an air compressor or air pump. Its function is to remove filter cake residue through reverse airflow.

[0045] Specifically, during the filtration stage, the drain port 41 remains open, and the liquid is discharged through the pipeline. After the pressure filtration is completed, the purging equipment blows gas in through the air inlet 42. The high-pressure gas enters the filter frame in reverse through the pipeline 11 and is blown out through the filtrate hole 102, forcing the filter cake to separate from the filter cloth. Since the drain pipe assembly 4 is independently installed outside the filter plate, there is no need to disassemble the filter plate body and filter frame during maintenance. Maintenance operations can be performed simply by disconnecting the drain pipe assembly 4. The airflow pressure of the purging equipment can be adjusted according to the adhesion strength of the filter cake, avoiding mechanical impact on the internal structure of the filter plate body 1.

[0046] Furthermore, it also includes two roller handles 5, which are symmetrically installed on both sides of the filter plate body 1, and the roller handles 5 are rotatably mounted on the main beam of the filter press.

[0047] The roller handle 5 refers to an operating component with a rolling structure, which can be implemented using a combination of bearings and a hub, with its rim surface contacting the main beam to form a rolling pair. Symmetrical installation means that the two roller handles 5 are respectively arranged on the two edges of the filter plate body 1 in the width direction, which can be achieved by bolt fixing or snap-fit ​​connection to ensure balanced force on both sides.

[0048] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without any inventive effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. A filter plate for uniform feeding, characterized by: It includes the filter plate body, filter frame, several elastic elements, and drainage pipe assembly; The filter frame is disposed on one side of the filter plate body, and a plurality of elastic elements are provided between the filter frame and the filter plate body; The filter plate body is provided with a first feed hole that penetrates the thickness of the plate body, and the first feed hole is located below the center of the filter plate body; The filter plate body has several filtrate holes on both sides and several drain holes on the outer periphery of the filter plate body. The filtrate holes are connected to the drain holes through pipes. The filter plate body is equipped with the drain pipe assembly, and the feed end of the drain pipe assembly is connected to several drain holes. Filter cloths are installed on both sides of the filter plate body, and the filter cloths cover the filtrate holes.

2. The filter plate of claim 1, wherein: The first feed hole is located between the center of the filter plate body and the bottom of the filter plate body, and the first feed hole is located near the bottom of the filter plate body.

3. The filter plate of claim 2, wherein: The filter plate body is also provided with a second feed hole that penetrates the thickness of the plate body, and the second feed hole is located at the center of the filter plate body; The first feed hole and the second feed hole have the same shape and size.

4. The filter plate of uniform feed according to claim 3, wherein: The two ends of the first feed hole and the two ends of the second feed hole are respectively provided with feed port inserts. The feed port inserts are detachably equipped with sealing members, which are used to block the first feed hole and / or the second feed hole.

5. The filter plate of uniform feed according to claim 4, wherein: The filter cloth is installed on one side of the filter plate body by a cloth pressing assembly, which includes a feed inlet cloth pressing ring and several cloth pressing locks. The feed inlet pressure ring is detachably installed on the feed inlet insert, the filter cloth is disposed between the feed inlet pressure ring and the feed inlet insert, and the filter cloth does not cover the first feed hole and / or the second feed hole; A plurality of the cloth pressing locking components are detachably installed on both sides of the filter plate body. The plurality of cloth pressing locking components are equally spaced along one side of the filter plate body. The filter cloth is disposed between the plurality of cloth pressing locking components and one side of the filter plate body. The filter cloth covers a plurality of the filtrate holes on the same side of the filter plate body.

6. The filter plate of uniform feed according to claim 5, wherein: The elastic element is a nitrogen cylinder; The cylinder body of the nitrogen cylinder is installed on one side of the filter plate body, and the piston rod of the nitrogen cylinder is installed and connected to the filter frame.

7. The filter plate of uniform feed according to claim 5, wherein: The elastic element is a telescopic spring; One end of the telescopic spring is installed and connected to the filter plate body, and the other end of the telescopic spring is installed and connected to the filter frame.

8. The filter plate of uniform feed according to claim 6, wherein: The discharge end of the drainage pipe assembly is provided with a liquid discharge port and an air inlet, and the air inlet is connected to the purging equipment.

9. The filter plate of uniform feed according to claim 8, wherein: It also includes two roller handles, which are symmetrically installed on both sides of the filter plate body and are rotatably mounted on the main beam of the filter press.

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