Backflow prevention assembly and filter press

Abstract

The utility model provides an anti-reflux assembly and a filter press, the anti-reflux assembly comprises at least one filter bag, a first filter plate and a second filter plate, a cavity is formed in the filter bag, the filter bag is provided with at least one feeding pipe, and the feeding pipe is communicated with the cavity; the first filter plate is arranged on the first side of the filter bag, and one side, facing the filter bag, of the first filter plate is provided with at least one first elastic block; the second filter plate is arranged on the second side of the filter bag, and at least one second elastic block is arranged on one side, facing the filter bag, of the second filter plate; the first elastic block and the second elastic block abut against the two sides of the feeding pipe correspondingly, and the first elastic block and the second elastic block can seal or open the feeding pipe under the action of external force. After feeding is completed, the first elastic block and the second elastic block can abut against the feeding pipe under the action of external force, so that the feeding pipe is sealed, the probability that fluid in the filter bag flows back to the feeding pipe is effectively reduced, smoothness of the feeding pipe is guaranteed, and the follow-up discharging difficulty is reduced.

Description

Technical Field

[0001] This application relates to the manufacturing technology of filter press equipment, and more particularly to an anti-backflow component and a filter press. Background Technology

[0002] A filter press is a mechanical device that effectively separates solid particles from liquid in a suspension by applying external pressure. It is widely used in industries such as mining, chemical, pharmaceutical, metallurgy, food, and environmental protection. During the filtration process, a backflow prevention device is required to prevent fluid in the filter chamber from flowing back into the feed pipe, which could cause blockage.

[0003] In the relevant technical solutions, the anti-backflow device of the filter press mainly includes a one-way valve installed between the feed pipe and the filter chamber. The one-way valve allows fluid to enter the filter chamber from the feed pipe, but does not allow the fluid in the filter chamber to flow back to the feed pipe.

[0004] However, when using related technologies to filter coal slime, the moisture content of the coal slime has dropped significantly during the feeding stage, and it is basically in a solid state. The coal slime adhering to the one-way valve may cause the one-way valve to not close tightly, thereby causing the fluid in the filter chamber to flow back into the feed pipe and causing blockage of the feed pipe. Utility Model Content

[0005] In order to overcome the above-mentioned defects in related technologies, the purpose of this application is to provide an anti-backflow component and a filter press. This application helps to reduce the probability of fluid in the filter bag flowing back to the feed pipe, thereby ensuring the smooth flow of the feed pipe.

[0006] On one hand, this application provides an anti-backflow component, comprising:

[0007] At least one filter bag, wherein a cavity is formed inside the filter bag, and the filter bag is provided with at least one feed pipe, the feed pipe being connected to the cavity;

[0008] A first filter plate is disposed on a first side of the filter bag, and at least one first elastic block is provided on the side of the first filter plate facing the filter bag.

[0009] The second filter plate is disposed on the second side of the filter bag, and at least one second elastic block is provided on the side of the second filter plate facing the filter bag;

[0010] The first elastic block and the second elastic block respectively abut against both sides of the feed pipe, and the first elastic block and the second elastic block can seal or open the feed pipe under the action of external force.

[0011] In one possible implementation, the first filter plate is provided with a first mounting groove, and the first elastic block is interference-fitted with the first mounting groove;

[0012] The second filter plate is provided with a second mounting groove, and the second elastic block is interference-fitted with the second mounting groove.

[0013] In one possible implementation, the first elastic block comprises either a polyurethane block or a rubber block; the second elastic block comprises either a polyurethane block or a rubber block.

[0014] In one possible implementation, the first elastic block has a first protrusion on the side opposite to the first filter plate, the second elastic block has a first recess on the side opposite to the second filter plate, and the feed pipe is located between the first protrusion and the first recess.

[0015] In one possible implementation, the first elastic block has a plurality of first saw teeth on the side opposite to the first filter plate, and the second elastic block has a plurality of second saw teeth on the side opposite to the second filter plate. The plurality of first saw teeth and the plurality of second saw teeth can mesh with each other, and the feed pipe is located between the plurality of first saw teeth and the plurality of second saw teeth.

[0016] In one possible implementation, the filter bag includes a top wall, a bottom wall, a first side wall, a second side wall, a third side wall, and a fourth side wall. The top wall and the bottom wall are arranged opposite each other along a first direction, the first side wall and the second side wall are arranged opposite each other along a second direction, and the third side wall and the fourth side wall are arranged opposite each other along a third direction. The top wall, the bottom wall, the first side wall, the second side wall, the third side wall, and the fourth side wall together form the cavity. The first filter plate abuts against the first side wall, the second filter plate abuts against the second side wall, and the bottom wall is provided with a discharge port, which communicates with the cavity.

[0017] In one possible implementation, the first sidewall has a first hanging ear on the side facing away from the bottom wall, and the second sidewall has a second hanging ear on the side facing away from the bottom wall.

[0018] In one possible implementation, the filter bag is provided with two feed pipes, both of which are disposed on the top wall and located on both sides of the first hanging ear.

[0019] In one possible implementation, the feed pipe is integrated with the filter bag.

[0020] On the other hand, this application provides a filter press, including a frame, on which at least one anti-backflow component as described above is provided.

[0021] This application provides an anti-backflow assembly and a filter press. The anti-backflow assembly includes at least one filter bag, a first filter plate, and a second filter plate. A cavity is formed inside the filter bag, and the filter bag is provided with at least one feed pipe communicating with the cavity. The first filter plate is disposed on a first side of the filter bag, and at least one first elastic block is provided on the side of the first filter plate facing the filter bag. The second filter plate is disposed on a second side of the filter bag, and at least one second elastic block is provided on the side of the second filter plate facing the filter bag. The first and second elastic blocks respectively abut against the two sides of the feed pipe, and the first and second elastic blocks can seal or open the feed pipe under external force. After feeding, the feed pipe can be sealed by the first and second elastic blocks abutting against it under external force, effectively reducing the probability of fluid flowing back into the feed pipe from the filter bag, ensuring the smooth flow of the feed pipe, and reducing the difficulty of subsequent unloading. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a simplified structural diagram of an anti-backflow assembly provided in an embodiment of this application in its first state.

[0024] Figure 2 A simplified structural diagram of the anti-backflow assembly provided in an embodiment of this application in the second state;

[0025] Figure 3 A simplified structural diagram of a first filter plate provided in an embodiment of this application;

[0026] Figure 4 This is a simplified structural diagram of a filter bag provided in one embodiment of this application;

[0027] Figure 5 A simplified structural diagram of a filter press provided in an embodiment of this application.

[0028] Figure label:

[0029] 10-Anti-backflow assembly;

[0030] 20 racks;

[0031] 30 - Stamping device;

[0032] 100 - Filter bag; 101 - Top wall; 102 - Bottom wall; 103 - First side wall; 104 - Third side wall; 105 - Fourth side wall; 110 - Inlet pipe; 120 - First hanging ear;

[0033] 200 - First filter plate; 210 - First elastic block;

[0034] 300 - Second filter plate; 310 - Second elastic block. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0036] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0037] As described in the background art, in the related technology, when pressing coal slime, the moisture content of the coal slime has dropped significantly during the feeding stage, and it is basically in a solid state. The coal slime adhering to the one-way valve may cause the one-way valve to not close tightly, thereby causing the fluid in the filter chamber to flow back into the feed pipe and causing blockage of the feed pipe.

[0038] In view of this, the present application aims to provide an anti-backflow component and a filter press. The anti-backflow component includes at least one filter bag, a first filter plate, and a second filter plate. A cavity is formed inside the filter bag, and the filter bag is provided with at least one feed pipe communicating with the cavity. The first filter plate is disposed on a first side of the filter bag, and at least one first elastic block is provided on the side of the first filter plate facing the filter bag. The second filter plate is disposed on a second side of the filter bag, and at least one second elastic block is provided on the side of the second filter plate facing the filter bag. The first and second elastic blocks respectively abut against the two sides of the feed pipe, and the first and second elastic blocks can seal or open the feed pipe under the action of external force. After feeding is completed, the feed pipe can be sealed by the first and second elastic blocks abutting against it under the action of external force, effectively reducing the probability of fluid in the filter bag flowing back into the feed pipe, ensuring the smooth flow of the feed pipe, and reducing the difficulty of subsequent unloading.

[0039] The embodiments of this application will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can gain a more detailed understanding of the content of this application. It should be noted that, in the description of this embodiment, the first direction X, the second direction Y, and the third direction Z are three different directions in three-dimensional space. For example, the first direction X, the second direction Y, and the third direction Z can be perpendicular to each other, and the first direction X can be, for example, a vertical direction.

[0040] Please refer to Figures 1-4This embodiment provides an anti-backflow component 10, including:

[0041] At least one filter bag 100 is provided. Exemplarily, the filter bag 100 may be made of high-strength filter cloth, enabling it to withstand strong pressure without rupture. The specific material of the filter bag 100 can be determined as needed. A cavity is formed inside the filter bag 100, and the filter bag 100 is provided with at least one feed pipe 110 communicating with the cavity, thereby facilitating the injection of coal slurry into the filter bag 100 through the feed pipe 110. The feed pipe 110 may be made of a flexible material, thereby giving it a certain degree of deformation capability. The number of filter bags 100 can be determined as needed, for example, one or two.

[0042] A first filter plate 200 is disposed on the first side of the filter bag 100, and at least one first elastic block 210 is provided on the side of the first filter plate 200 facing the filter bag 100. In this embodiment, the first filter plate 200 may be made of metal material, thereby giving it high rigidity. The first elastic block 210 is fixedly connected to the first filter plate 200, and the specific connection method can be determined as needed.

[0043] The second filter plate 300 is disposed on the second side of the filter bag 100, and at least one second elastic block 310 is provided on the side of the second filter plate 300 facing the filter bag 100. In this embodiment, the second filter plate 300 can adopt a structure similar to the first filter plate 200 to reduce manufacturing difficulty. The second filter plate 300 can be made of metal material, thereby giving it high rigidity. The second elastic block 310 is fixedly connected to the second filter plate 300, and the specific connection method can be determined as needed.

[0044] In this embodiment, the first elastic block 210 and the second elastic block 310 abut against both sides of the feed pipe 110, and the first elastic block 210 and the second elastic block 310 can seal or open the feed pipe 110 under the action of external force. It can be understood that the first elastic block 210, the second elastic block 310 and the feed pipe 110 in this embodiment can have a relative first state and a second state.

[0045] like Figure 1As shown, in the first state, the first elastic block 210 and the second elastic block 310 can respectively abut against both sides of the feed pipe 110, completely sealing the feed gap of the feed pipe 110, thus closing the feed pipe 110. At this time, external coal slurry cannot be injected into the filter bag 100, and the coal slurry inside the filter bag 100 will not flow back to the feed pipe 110 during subsequent filtration. Since the first elastic block 210 and the second elastic block 310 themselves have a certain amount of elastic deformation, the first elastic block 210 and the second elastic block 310 will not hinder the subsequent filtration of the filter bag 100. During the filtration process, under the action of external force, the compression of the first elastic block 210 and the second elastic block 310 increases, and the resulting sealing force also increases, completely eliminating the possibility of coal slurry backflow inside the filter bag 100. After the filtration stage is completed, since the first elastic block 210 and the second elastic block 310 completely cut off and sealed the feed pipe 110, the filter cake inside the filter bag 100 will not be physically adhered to the feed pipe 110. Furthermore, the entire area where the filter cake is generated lies within the filter press plane, and the moisture content of each part of the filter cake is relatively low, resulting in weak adhesion to the filter bag 100, thus making unloading relatively easy. The residual coal slime in the feed pipe 110 is limited and in liquid form, which will not affect the next feed.

[0046] like Figure 2 As shown, in the second state, the first elastic block 210 and the second elastic block 310 may not contact the feed pipe 110; or, the first elastic block 210 and the second elastic block 310 may respectively abut against the two sides of the feed pipe 110 and squeeze the feed pipe 110 into an elliptical shape, but always leave a feed gap to ensure that the external coal slurry can enter the filter bag 100 through the feed pipe 110.

[0047] After feeding is completed in this embodiment, the first elastic block 210 and the second elastic block 310 can be used to abut against the feed pipe 110 under the action of external force, thereby sealing the feed pipe 110. This effectively reduces the probability of fluid in the filter bag 100 flowing back into the feed pipe 110, ensuring the smooth flow of the feed pipe 110 and reducing the difficulty of subsequent unloading. Furthermore, for coal slime from different coal washing plants, it is no longer necessary to select a rapping mechanism, significantly reducing component costs and labor costs.

[0048] Please continue to refer to Figure 3 In this embodiment, the first filter plate 200 is provided with a first mounting groove, and the first elastic block 210 is interference-fitted with the first mounting groove. Specifically, the first mounting groove can be, for example, a dovetail groove, and the first elastic block 210 is partially pressed into the dovetail groove, thereby achieving an interference fit with the first filter plate 200.

[0049] Similarly, the second filter plate 300 is provided with a second mounting groove, and the second elastic block 310 is interference-fitted with the second mounting groove. Specifically, the second mounting groove can be, for example, a dovetail groove, and the second elastic block 310 is partially pressed into the dovetail groove, thereby achieving an interference fit with the second filter plate 300.

[0050] Furthermore, the first elastic block 210 in this embodiment includes either a polyurethane block or a rubber block. The second elastic block 310 may also include either a polyurethane block or a rubber block. It is understood that the hardness of the first elastic block 210 and the second elastic block 310 can also be adjusted according to the coal slime pressure filter.

[0051] In one possible implementation, this embodiment may further provide a first protrusion on the side of the first elastic block 210 facing away from the first filter plate 200, and a first recess on the side of the second elastic block 310 facing away from the second filter plate 300, with the feed pipe 110 located between the first protrusion and the first recess. It is understood that the feed pipe 110 can be pressed into the first recess by the first protrusion, thereby sealing the feed pipe 110. Compared to the above-described scheme where the surfaces of the first elastic block 210 and the second elastic block 310 are planar, by providing the first protrusion and the first recess, the contact area between the first elastic block 210 and the second elastic block 310 and the feed pipe 110 can be further increased, thereby further improving the sealing performance of the feed pipe 110 and reducing the probability of fluid in the filter bag 100 flowing back to the feed pipe 110 after feeding.

[0052] In another possible implementation, this embodiment may also have multiple first serrations on the side of the first elastic block 210 facing away from the first filter plate 200, and multiple second serrations on the side of the second elastic block 310 facing away from the second filter plate 300. The multiple first serrations and multiple second serrations can mesh with each other, and the feed pipe 110 is located between the multiple first serrations and multiple second serrations. Compared with the above-mentioned scheme where the surfaces of the first elastic block 210 and the second elastic block 310 are flat, by setting multiple first serrations and multiple second serrations, the contact area between the first elastic block 210 and the second elastic block 310 and the feed pipe 110 can be further increased, thereby further improving the sealing performance of the feed pipe 110 and reducing the probability of fluid in the filter bag 100 flowing back to the feed pipe 110 after feeding is completed.

[0053] Please continue to refer to Figure 4The filter bag 100 in this embodiment includes a top wall 101, a bottom wall 102, a first side wall 103, a second side wall, a third side wall 104, and a fourth side wall 105. The top wall 101 and the bottom wall 102 are arranged opposite each other along a first direction X, the first side wall 103 and the second side wall are arranged opposite each other along a second direction Y, and the third side wall 104 and the fourth side wall 105 are arranged opposite each other along a third direction Z. The top wall 101, the bottom wall 102, the first side wall 103, the second side wall, the third side wall 104, and the fourth side wall 105 together form a cavity. A first filter plate 200 abuts against the first side wall 103, and a second filter plate 300 abuts against the second side wall. A discharge port is provided on the bottom wall 102, and the discharge port is connected to the cavity. It can be understood that during the filtration process, the discharge port on the bottom wall 102 can be clamped by an external clamping mechanism, thereby keeping the filter bag 100 in a sealed state. After the filter press is completed, the discharge port can be opened to discharge the filter cake.

[0054] Furthermore, in this embodiment, the first sidewall 103 is provided with a first hanging ear 120 on the side facing away from the bottom wall 102, and the second sidewall is provided with a second hanging ear on the side facing away from the bottom wall 102. The filter bag 100 can be suspended on the frame through the first hanging ear 120 and the second hanging ear, thereby performing the filter pressing operation.

[0055] The filter bag 100 in this embodiment is provided with two feed pipes 110, both of which are disposed on the top wall 101 and located on both sides of the first hanging ear 120. Preferably, the two feed pipes 110 can be symmetrically arranged, so that the filter bag 100 can be fed at the same time through the feed pipes 110 on both sides, thereby improving the uniformity and speed of feeding.

[0056] In this embodiment, the feed pipe 110 and the filter bag 100 are integrated. Alternatively, the feed pipe 110 can be made by sewing filter cloth and filter bag 100 together. During feeding, an external metal tube can be inserted into the feed pipe 110 and connected and fixed by fasteners such as pagoda connectors and clamps to ensure the stability of feeding.

[0057] Please refer to Figure 5 This embodiment also provides a filter press, including a frame 20, on which at least one of the above-mentioned anti-backflow components 10 is provided.

[0058] Specifically, multiple anti-backflow components 10 can be installed on the frame 20, and a stamping device 30 can be installed on one side of the frame 20. The stamping device 30 may include, for example, a hydraulic cylinder or a pneumatic cylinder. By pressing the anti-backflow components 10 with the stamping device 30, the filtration of multiple filter bags can be completed simultaneously.

[0059] The filter press in this embodiment, by employing the aforementioned anti-backflow component 10, reduces the likelihood of fluid flowing back into the feed pipe during the filtration process, ensuring unobstructed flow and reducing the difficulty of subsequent unloading. Furthermore, for coal slime from different coal washing plants, a vibrating mechanism is no longer required, significantly reducing component and labor costs.

[0060] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0061] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0062] It should be noted that in the description of this application, the terms "first" and "second" are used only for convenience in describing different components and should not be construed as indicating or implying a sequential relationship, relative importance, or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features.

[0063] The embodiments or implementation methods in this application are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0064] In the description of this application, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with an embodiment or example that are included in at least one embodiment or example of this application. In this application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An anti-backflow component, characterized in that, include: At least one filter bag, wherein a cavity is formed inside the filter bag, and the filter bag is provided with at least one feed pipe, the feed pipe being connected to the cavity; A first filter plate is disposed on a first side of the filter bag, and at least one first elastic block is provided on the side of the first filter plate facing the filter bag. The second filter plate is disposed on the second side of the filter bag, and at least one second elastic block is provided on the side of the second filter plate facing the filter bag; The first elastic block and the second elastic block respectively abut against both sides of the feed pipe, and the first elastic block and the second elastic block can seal or open the feed pipe under the action of external force.

2. The anti-backflow assembly according to claim 1, characterized in that, The first filter plate is provided with a first mounting groove, and the first elastic block is interference-fitted with the first mounting groove; The second filter plate is provided with a second mounting groove, and the second elastic block is interference-fitted with the second mounting groove.

3. The anti-backflow assembly according to claim 1, characterized in that, The first elastic block includes either a polyurethane block or a rubber block; the second elastic block includes either a polyurethane block or a rubber block.

4. The anti-backflow assembly according to claim 1, characterized in that, The first elastic block has a first protrusion on the side opposite to the first filter plate, and the second elastic block has a first recess on the side opposite to the second filter plate. The feed pipe is located between the first protrusion and the first recess.

5. The anti-backflow assembly according to claim 1, characterized in that, The first elastic block has a plurality of first saw teeth on the side opposite to the first filter plate, and the second elastic block has a plurality of second saw teeth on the side opposite to the second filter plate. The plurality of first saw teeth and the plurality of second saw teeth can mesh with each other, and the feed pipe is located between the plurality of first saw teeth and the plurality of second saw teeth.

6. The anti-backflow assembly according to any one of claims 1-5, characterized in that, The filter bag includes a top wall, a bottom wall, a first side wall, a second side wall, a third side wall, and a fourth side wall. The top wall and the bottom wall are arranged opposite each other along a first direction, the first side wall and the second side wall are arranged opposite each other along a second direction, and the third side wall and the fourth side wall are arranged opposite each other along a third direction. The top wall, the bottom wall, the first side wall, the second side wall, the third side wall, and the fourth side wall together form the cavity. The first filter plate abuts against the first side wall, the second filter plate abuts against the second side wall, and the bottom wall is provided with a discharge port, which is connected to the cavity.

7. The anti-backflow assembly according to claim 6, characterized in that, The first sidewall has a first hanging ear on the side opposite to the bottom wall, and the second sidewall has a second hanging ear on the side opposite to the bottom wall.

8. The anti-backflow assembly according to claim 7, characterized in that, The filter bag is provided with two feed pipes, both of which are located on the top wall and on either side of the first hanging ear.

9. The anti-backflow assembly according to claim 6, characterized in that, The feed pipe is integrated with the filter bag.

10. A filter press, characterized in that, It includes a frame on which at least one anti-backflow component as described in any one of claims 1-9 is provided.

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