Filter bag assembly and filter press

Abstract

The utility model provides a filter bag assembly and a filter press, and belongs to the technical field of solid-liquid separation equipment.The filter bag sealing structure comprises a filter bag body and a sealing structure, the filter bag body comprises two main filtering faces arranged oppositely, one end of the filter bag body is provided with an opening, and the sealing structure is located at the opening end of the filter bag body; the sealing structure is used for sealing the opening when the filter bag main body is in a feeding or filter pressing state, and is used for opening the opening when the filter bag main body is in a discharging state. In other words, the filter bag main body is matched with the sealing structure for use, and the sealing structure is used for controlling the filter bag to tightly seal the opening of the filter bag during feeding or filter pressing, so that the leakage of liquid to be filtered or solid particles is effectively prevented, and the smooth filter pressing process is ensured. Through the sealing structure, the opening for sealing the filter bag is controlled to be opened when the filter bag is unloaded after filter pressing is completed, so that the filter cake in the filter bag can be separated from the filter bag.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of solid-liquid separation equipment, and particularly to a filter bag assembly and a filter press. Background Art

[0002] In the solid-liquid separation industry, separating the solid-liquid mixed material into solid and liquid parts is a very important and necessary step.

[0003] In traditional filter presses, several filter plates are often used. Two adjacent filter plates are sealed to form a filter cavity, and the material is fed from the outside to the inside. The filter cake is formed by relying on the feeding pressure and the pressure of the hydraulic cylinder. As the amount of the material to be filtered increases, the filter cake gradually thickens, and the liquid permeation rate will gradually decrease, and the filtration efficiency will also decrease accordingly. The sealing effect of the filter press directly affects the filtration efficiency and operation safety, avoids the spraying phenomenon during the filter pressing process, and improves the filtrate separation efficiency. Utility Model Content

[0004] The embodiments of the present application provide a filter bag assembly and a filter press, which solve the sealing effect problem at the open end of the filter bag during the filter pressing process of the bag type filter press, ensure the sealing performance at the open end of the filter bag under high-pressure conditions, and avoid the leakage of the material to be filtered due to poor sealing effect, thereby affecting the product quality and the working environment.

[0005] The embodiments of the present application provide the following technical solutions to solve the above technical problems:

[0006] The embodiments of the present application provide a filter bag assembly, including:

[0007] A filter bag body, the filter bag body includes two main filtering surfaces arranged oppositely, and one end of the filter bag body has an open end;

[0008] A sealing structure, the sealing structure is located at the open end of the filter bag body, and the sealing structure is used to seal the open end when the filter bag body is in the feeding or filter pressing process, and is used to open the open end when the filter bag body is discharging.

[0009] Advantages of the embodiments of the present application: The filter bag assembly provided by the embodiments of the present application includes a filter bag body and a sealing structure. The filter bag body includes two main filter surfaces arranged opposite to each other. One end of the filter bag body has an opening. The sealing structure is located at the open end of the filter bag body, and the sealing structure is used to seal the opening when the filter bag body is in the feeding or pressure filtration process, and is used to open the opening when the filter bag body is discharging. That is to say, the filter bag body and the sealing structure are used in cooperation. By controlling the sealing structure to tightly seal the opening of the filter bag during feeding or pressure filtration, the leakage of the liquid to be filtered or solid particles is effectively prevented, thereby ensuring the smooth progress of the pressure filtration process. Through the sealing structure, it is also controlled to open the sealed opening of the filter bag when discharging after the pressure filtration is completed, so that the filter cake in the filter bag can be separated from the filter bag.

[0010] In a possible implementation manner, the sealing structure includes a pressing member. The pressing member includes a first pressing strip and a second pressing strip arranged opposite to each other. There is at least one filter bag body between the first pressing strip and the second pressing strip;

[0011] The first pressing strip and the second pressing strip respectively cooperate with the bottom ends of the two main filter surfaces. When the first pressing strip and the second pressing strip are in contact with each other, the opening is sealed, and when the first pressing strip and the second pressing strip are separated from each other, the opening is opened.

[0012] In a possible implementation manner, the sealing structure further includes a first driving mechanism. The first driving mechanism is used to make the first pressing strip and the second pressing strip contact each other to seal the opening, and is used to separate the first pressing strip and the second pressing strip to open the opening when the filter bag body is discharging.

[0013] In a possible implementation manner, connectors are provided at both ends of the first pressing strip and the second pressing strip, and the connectors are connected to the first driving mechanism;

[0014] The connectors are arranged on the surface of the first pressing strip facing away from the second pressing strip and on the surface of the second pressing strip facing away from the first pressing strip.

[0015] In a possible implementation manner, the first driving mechanism includes a cylinder and a connecting mechanism. The cylinder is connected to the pressing member through the connecting mechanism. By driving the connecting mechanism through the cylinder, the pressing member seals or opens the opening of the filter bag body;

[0016] Each of the first driving mechanisms further includes a push rod, one end of the push rod is connected to the air cylinder, and the other end of the push rod abuts against the connecting mechanism. The air cylinder drives the push rod to abut against the connecting mechanism so that the pressing member closes or opens the opening of the filter bag body.

[0017] In a possible implementation manner, the pressing member further includes at least one third pressing strip, the third pressing strip is located between the first pressing strip and the second pressing strip, and the third pressing strip cooperates with the bottom end of one of the main filtering surfaces of the filter bag body;

[0018] At least one filter bag body is provided between two adjacent pressing members.

[0019] In a possible implementation manner, the connecting mechanism includes a first connecting rod and a second connecting rod. The bottom end of the first connecting rod is respectively connected to the connecting members on the first pressing strip and the second pressing strip, and the top end of the first connecting rod is connected to the air cylinder. The air cylinder drives the first connecting rod so that the first pressing strip and the second pressing strip seal or open the opening of the filter bag body;

[0020] The second connecting rod is arranged at one end of each pressing member so as to connect each of the first pressing strip, the second pressing strip and the third pressing strip.

[0021] In a possible implementation manner, a groove is provided on the surface of the first pressing strip facing the second pressing strip, and a protrusion is provided on the surface of the second pressing strip facing the first pressing strip;

[0022] The protrusion is provided on the surface of the third pressing strip facing the first pressing strip, and the groove is provided on the surface of the third pressing strip facing the second pressing strip.

[0023] In a possible implementation manner, each pressing member is provided with a mounting hole for a positioning cross bar to pass through, and the bottom end of the filter bag body is sleeved on the positioning cross bar;

[0024] Positioning members are respectively provided on both sides of the bottom end of the filter bag body, and positioning holes are provided on the positioning members for the positioning cross bar to pass through.

[0025] An embodiment of the present application provides a filter press, including:

[0026] A frame, a pressing plate, and the above-mentioned filter bag assembly. The filter bag assembly is movably arranged on the frame, and the filter bag assembly is pressed by the pressing plate.

[0027] In addition to the technical problems solved by this application, the technical features constituting the technical solution, and the beneficial effects brought by the technical features of these technical solutions described above, other technical problems that can be solved by a filter bag assembly and a filter press provided by this application, other technical features included in the technical solution, and the beneficial effects brought by these technical features will be further described in detail in the specific implementation manner. Brief Description of the Drawings

[0028] In order to more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments of this application or the prior art. Obviously, the drawings in the following description are only a part of the embodiments of this application. These drawings and the text description are not intended to limit the scope of the concept of this application in any way, but to illustrate the concept of this application to those skilled in the art by referring to specific embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0029] Figure 1 Structural schematic diagram of the filter bag assembly provided by the embodiment of this application;

[0030] Figure 2 Expansion structural schematic diagram of the sealing structure provided by the embodiment of this application;

[0031] Figure 3 Contraction schematic diagram of the sealing structure provided by the embodiment of this application;

[0032] Figure 4 Cross-sectional schematic diagram of the sealing structure provided by the embodiment of this application;

[0033] Figure 5 Structural schematic diagram of the filter bag provided by the embodiment of this application;

[0034] Figure 6 Structural schematic diagram of the filter press provided by the embodiment of this application.

[0035] Explanation of the reference numerals in the drawings:

[0036] 100 - Frame;

[0037] 210 - Press plate;

[0038] 220 - Filter bag; 221 - Filter bag body; 222 - Main filtration surface; 225 - Open end; 228 - Positioning member; 229 - Positioning hole;

[0039] 230 - Suspension device;

[0040] 240 - Sealing structure; 241 - Compressing member; 242 - First driving mechanism; 243 - Cylinder; 244 - Connecting mechanism; 245 - Push rod; 246 - Connecting piece

[0041] 2411 - First compressing strip; 2412 - Second compressing strip; 2413 - Third compressing strip; 2414 - Groove; 2415 - Protrusion; 2416 - Mounting hole; 2417 - Positioning cross bar

[0042] 2441 - First connecting rod; 2442 - Second connecting rod Specific embodiments

[0043] The open end of the filter bag in the bag filter press needs to meet the opening or closing requirements in different filtration stages. Especially during feeding or filtration, the open end of the filter bag needs to be tightly sealed, effectively preventing the leakage of the liquid to be filtered or solid particles, thus ensuring the smooth progress of the filtration process.

[0044] In view of this, in the embodiments of the present application, the filter bag body is arranged to cooperate with the sealing structure. The sealing structure controls the tight sealing of the open end of the filter bag during feeding or filtration, effectively preventing the leakage of the liquid to be filtered or solid particles, thus ensuring the smooth progress of the filtration process. The sealing structure also controls the opening of the closed open end of the filter bag when discharging after filtration is completed, so that the filter cake in the filter bag can be separated from the filter bag. It simplifies the operation process, reduces the maintenance cost, and improves the filtration efficiency.

[0045] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope protected by the present application.

[0046] Figure 1 It is a schematic diagram of the expansion structure of the filter bag assembly provided by the embodiments of the present application Figure 2 It is a schematic diagram of the contraction structure of the filter bag assembly provided by the embodiments of the present application Figure 3 It is a schematic diagram of the assembly of the filter bag assembly and the filter bag body provided by the embodiments of the present application Figure 5 It is a schematic diagram of the structure of the filter bag provided by the embodiments of the present application Figure 6 It is a schematic diagram of the structure of the filter press provided by the embodiments of the present application

[0047] An embodiment of the present application provides a filter press, which includes a frame 100, a pressing plate 210, and a filter bag assembly. The filter bag assembly is movably arranged on the frame 100, and the filter bag assembly is pushed by the pressing plate 210 for pressure filtration. A suspension device 230 is provided at the top end of the filter bag 220, and a sealing structure 240 is provided at the bottom end of the filter bag. The filter bag 220 is connected to the frame 100 through the suspension device 230, and the suspension device 230 is movably arranged on the frame. The sealing structure 240 at the bottom end of the filter bag 220 can seal the bottom end of the filter bag 220 when necessary.

[0048] Exemplarily, as Figure 6 shown, the pressing plate 210 is used to squeeze the filter bag 220, so that the material to be filtered in the filter bag 220 forms a filter cake after pressure filtration. The pressure filtration operation of the filter bag 220 is realized by the push of the pressing plate 210, and the filter bag assembly can be driven to move on the frame 100. The filter bag assembly can ensure that the filter bag 220 is tightly sealed during the pressure filtration process, and prevent the possibility of spraying or leakage of the material to be filtered in the filter bag 220 when the pressing plate 210 pushes and squeezes the filter bag 220.

[0049] Provided by the embodiment of the present application Filter bag assembly , including a filter bag body 221 and a sealing structure 240. Among them, the filter bag body 221 includes two main filtering surfaces 222 arranged oppositely, and one end of the filter bag body 221 has an opening 225. The sealing structure 240 is located at the opening 225 end of the filter bag body 221, and the sealing structure 240 is used to seal the opening 225 when the filter bag body 221 is in the feeding or pressure filtration state, and to open the opening 225 when the filter bag body 221 is discharging.

[0050] As Figure 1 shown, the filter bag assembly includes a filter bag body 221 and a sealing structure 240. Among them, the filter bag body 221 is used to accommodate the material to be filtered and the filter cake after pressure filtration. The filter bag body 221 includes two main filtering surfaces 222 arranged oppositely, and one end of the filter bag body 221 is designed as an opening 225 to facilitate the removal of the filter cake after pressure filtration. In the embodiment of the present application, the opening 225 of the filter bag body 221 is arranged at the bottom end of the main filtering surface 222. It can be understood that the opening 225 can be, but is not limited to, arranged at the bottom end of the main filtering surface 222. For example, it can also be arranged at the top end of the main filtering surface 222. This article mainly takes the opening 225 arranged at the bottom end of the main filtering surface 222 as an example for illustration.

[0051] Please continue to refer to Figure 1, The sealing structure 240 is located at one end of the opening 225 of the filter bag body 221, and the sealing structure 240 can play different roles at different pressure filtration stages of the filter bag body 221. In a possible implementation, when the filter press is in the feeding or pressure filtration process, the sealing structure 240 can seal the opening 225 of the filter bag body 221 to prevent the material to be filtered from splashing or leaking under high pressure, ensuring the smooth progress of the pressure filtration process. It can be understood that the better the sealing performance of the sealing structure 240, the higher the separation efficiency of the filtrate, making the filter cake obtained by pressure filtration drier, tighter, and with lower water content, which is convenient for subsequent treatment and recycling.

[0052] In another possible implementation, after the pressure filtration is completed and the filter bag body 221 is in the discharging process, the sealing structure 240 can flexibly open the opening 225 of the filter bag body 221, so that the filter cake or residual material can be smoothly discharged from the filter bag 220. This simplifies the discharging process, improves the working efficiency, and reduces the labor intensity of the operators.

[0053] In some embodiments of the present application, the sealing structure 240 includes a first pressing strip 2411 and a second pressing strip 2412 which are oppositely arranged, and there is at least one filter bag body 221 between the first pressing strip 2411 and the second pressing strip 2412. The first pressing strip 2411 and the second pressing strip 2412 are respectively matched with the bottom ends of the two main filtering surfaces 222. When the first pressing strip 2411 and the second pressing strip 2412 are attached to each other, the opening 225 is sealed, and when the first pressing strip 2411 and the second pressing strip 2412 are separated, the opening 225 is opened.

[0054] The sealing structure 240 particularly includes a first pressing strip 2411 and a second pressing strip 2412 which are oppositely arranged, and the first pressing strip 2411 and the second pressing strip 2412 are respectively used in cooperation with the bottom ends of the two main filtering surfaces 222 of the filter bag body 221. A filter bag body 221 is arranged between the first pressing strip 2411 and the second pressing strip 2412, and the number of filter bag bodies 221 can be any number. It should be noted that in the embodiments of the present application, three filter bag bodies 221 are arranged between the first pressing strip 2411 and the second pressing strip 2412.

[0055] In a possible implementation, when the filter press is in the discharging process, combined with Figure 1 and Figure 2 shown, the first pressing strip 2411 and the second pressing strip 2412 are separated, which can make the opening 225 of the filter bag body 221 in an open state, so that the filter cake in the filter bag body 221 can be smoothly discharged from the opening 225.

[0056] In a possible implementation, when the filter press is in the feeding or pressure filtration process, combined with Figure 1 and Figure 3As shown, the first pressing strip 2411 and the second pressing strip 2412 are fitted together, capable of tightly clamping the opening 225 of the filter bag body 221, enabling the filter bag body 221 to form a closed filtering environment, thereby effectively preventing the leakage of the filtered material and ensuring the pressure filtration efficiency and the purity of the filtrate.

[0057] In some embodiments of the present application, the sealing structure 240 further includes a first driving mechanism 242. The first driving mechanism 242 is used to fit the first pressing strip 2411 and the second pressing strip 2412 together to seal the opening 225, and to separate the first pressing strip 2411 and the second pressing strip 2412 when discharging the material from the filter bag body 221 to open the opening 225. As Figure 2 and Figure 3 shown, the first driving mechanism 242 can control the first pressing strip 2411 and the second pressing strip 2412, so that the first pressing strip 2411 and the second pressing strip 2412 can be fitted together or separated.

[0058] It should be noted that, in the embodiments of the present application, there are two first driving mechanisms 242, which are respectively arranged at both ends of the pressing member 241. It can be understood that arranging the first driving mechanisms 242 at both ends of the pressing member 241 can enhance the stability and reliability of the operation of the sealing structure 240. The two first driving mechanisms 242 can drive the first pressing strip 2411 and the second pressing strip 2412 to act simultaneously and symmetrically, ensuring that uniform force and accurate position can be maintained when sealing and opening the opening 225 of the filter bag body 221.

[0059] In some embodiments of the present application, connecting members 246 are provided at both ends of the first pressing strip 2411 and the second pressing strip 2412, and the connecting members 246 are connected to the first driving mechanism 242. The connecting members 246 are arranged on the surface of the first pressing strip 2411 facing away from the second pressing strip 2412, and on the surface of the second pressing strip 2412 facing away from the first pressing strip 2411.

[0060] Please continue to refer to Figure 2 and Figure 3 , connecting members 246 are provided on the surface of the first pressing strip 2411 facing away from the second pressing strip 2412 and on the surface of the second pressing strip 2412 facing away from the first pressing strip 2411. The connecting members 246 are used to connect the first driving structure to the first pressing strip 2411 and the second pressing strip 2412. It should be noted that connecting members 246 are provided at both ends of the first pressing member and both ends of the second pressing member, and at this time, they can be connected to the two first driving mechanisms 242. The uniformity and reliability of the sealing effect of the first driving mechanism 242 on the pressing member 241 are improved, effectively preventing problems such as deformation or damage of the pressing member 241 caused by uneven unilateral force.

[0061] In some embodiments of the present application, the first driving mechanism 242 includes a cylinder 243 and a connecting mechanism 244. The cylinder 243 is connected to the pressing member 241 through the connecting mechanism 244. The cylinder 243 drives the connecting mechanism 244 to seal or open the opening 225 of the filter bag body 221 by the pressing member 241.

[0062] As Figure 2 and Figure 3 shown, the first driving mechanism 242 includes a cylinder 243 and a connecting mechanism 244. The cylinder 243 is the core component of the first driving mechanism 242. The cylinder 243 is connected to the pressing member 241 through the connecting mechanism 244. By driving the connecting mechanism 244 through the cylinder 243, the pressing member 241 can be controlled to make the first pressing strip 2411 and the second pressing strip 2412 fit together to control the opening 225 of the filter bag body 221 to be in a closed state, or to separate the first pressing strip 2411 and the second pressing strip 2412 to control the opening 225 of the filter bag body 221 to be in an open state. It should be noted that the cylinder 243 can be a device that makes a linear reciprocating motion driven by air pressure.

[0063] In some embodiments of the present application, each first driving mechanism 242 further includes a push rod 245. One end of the push rod 245 is connected to the cylinder 243, and the other end of the push rod 245 abuts against the connecting mechanism 244. The cylinder 243 drives the push rod 245 to abut against the connecting mechanism 244 to seal or open the opening 225 of the filter bag body 221 by the pressing member 241.

[0064] Combined with Figure 2 and Figure 3 shown, one end of the push rod 245 in each first driving mechanism 242 is closely connected to the cylinder 243 to ensure that the air pressure power of the cylinder 243 can be directly and effectively transmitted to the push rod 245. The other end of the push rod 245 abuts against the connecting mechanism 244. The cylinder 243 drives the push rod 245 to make a linear motion to drive the connecting mechanism 244, and then controls the first pressing strip 2411 and the second pressing strip 2412 to close or open the opening 225 of the filter bag body 221.

[0065] In some embodiments of the present application, the sealing structure 240 further includes at least one third pressing strip 2413. The third pressing strip 2413 is located between the first pressing strip 2411 and the second pressing strip 2412, and the third pressing strip 2413 cooperates with the bottom end of one of the main filtering surfaces 222 of the filter bag body 221. At least one filter bag body 221 is provided between two adjacent pressing members 241.

[0066] Exemplarily, in the embodiments of the present application, the sealing structure 240 may further include a third pressing strip 2413. The third pressing strip 2413 is disposed between the first pressing strip 2411 and the second pressing strip 2412. The provision of the third pressing strip 2413 enhances the flexibility of the sealing structure 240, increases the number of filter bag bodies 221, and improves the pressure filtration efficiency.

[0067] As Figure 2 and Figure 3 shown, the sealing structure 240 is provided with two third pressing strips 2413. As Figure 6 shown, the sealing structure 240 is provided with three third pressing strips 2413. It should be noted that the number of the third pressing strips 2413 can be any number, such as zero, one, two, etc.

[0068] In some embodiments of the present application, the connecting mechanism 244 includes a first connecting rod 2441 and a second connecting rod 2442. The bottom end of the first connecting rod 2441 is respectively connected to the connecting members 246 on the first pressing strip 2411 and the second pressing strip 2412. The top end of the first connecting rod 2441 is connected to the air cylinder 243. The air cylinder 243 drives the first connecting rod 2441 to seal or open the opening 225 of the filter bag body 221 by the first pressing strip 2411 and the second pressing strip 2412. The second connecting rod 2442 is disposed at one end of each pressing member 241 to connect each first pressing strip 2411, second pressing strip 2412 and third pressing strip 2413.

[0069] As Figure 2 and Figure 3 shown, the top end of the first connecting rod 2441 is connected to the air cylinder 243, and the bottom end of the first connecting rod 2441 is respectively connected to the connecting members 246 on the first pressing strip 2411 and the second pressing strip 2412. When the air cylinder 243 drives the push rod 245 to reciprocate up and down to drive the first connecting rod 2441, the first pressing strip 2411 and the second pressing strip 2412 perform corresponding sealing or opening actions.

[0070] The second connecting rod 2442 is disposed at one end of each pressing member 241. Exemplarily, as Figure 2 and Figure 3 shown, the second connecting rod 2442 connects the first pressing strip 2411, the second pressing strip 2412 and two third pressing strips 2413, ensuring that when the air cylinder 243 of the first driving mechanism 242 on one side drives the push rod 245 to move, driving the opening 225 of each filter bag body 221 to be sealed or opened, each pressing member 241 can move synchronously, and the openings 225 of the filter bag bodies 221 disposed between each pressing member 241 can perform synchronous operations.

[0071] In some embodiments of the present application, one of two adjacent pressing members 241 is provided with a protrusion 2415, and the other of the two adjacent pressing members 241 is provided with a groove 2414 that cooperates with the protrusion 2415. A groove 2414 is provided on the surface of the first pressing strip 2411 facing the second pressing strip 2412, and a protrusion 2415 is provided on the surface of the second pressing strip 2412 facing the first pressing strip 2411. A protrusion 2415 is provided on the surface of the third pressing strip 2413 facing the first pressing strip 2411, and a groove 2414 is provided on the surface of the third pressing strip 2413 facing the second pressing strip 2412.

[0072] That is to say, as Figure 4 shown, there are several sealing structures 240. For two adjacent pressing members 241, a protrusion 2415 may be provided on the surface of one pressing member 241 facing the filter bag body 221, and a groove 2414 may be provided on the surface of the other pressing member 241 facing the filter bag body 221, and the protrusion 2415 and the groove 2414 cooperate with each other. Through the protrusion 2415 and the groove 2414, the sealing effect of the filter bag body 221 between the two pressing members 241 can be better. The tight fit can prevent leakage during the pressure filtration process of the filter bag body 221, and the protrusion 2415 and the groove 2414 can prevent relative displacement between two adjacent pressing members 241, further maintaining the stability and sealing performance of the filter bag body 221.

[0073] In some embodiments of the present application, each pressing member 241 is provided with a mounting hole 2416 for allowing the positioning cross bar 2417 to pass through, and the bottom end of the filter bag body 221 is sleeved on the positioning cross bar 2417. As Figure 1 shown, each pressing member 241 is provided with two mounting holes 2416, and the mounting holes 2416 are located at both ends of each pressing member 241 and are symmetrically arranged. Through the mounting holes 2416, the positioning cross bar 2417 can pass through the pressing member 241, so that the bottom end of the filter bag body 221 can be firmly sleeved on the positioning cross bar 2417. It can be understood that the symmetrical arrangement of the mounting holes 2416 on the pressing member can enhance the structural stability of the connection between the pressing member 241 and the filter bag body 221. During the process of driving the push rod 245 to move by the cylinder 243 of the first driving mechanism 242, driving the openings 225 of each filter bag body 221 to be sealed or opened, the overall stability of the filter bag body 221 is improved.

[0074] In some embodiments of the present application, positioning members 228 are respectively provided on both sides of the bottom end of the filter bag body 221, and positioning holes 229 are provided on the positioning members 228 for allowing the positioning cross bar 2417 to pass through. As Figure 5As shown, the filter bag body 221 is provided with positioning members 228 at both ends of the side close to the opening 225. In the embodiment of the present application, each main filter surface 222 is provided with positioning members 228 at both ends, that is, the number of positioning members 228 is four. It should be noted that the number of positioning members 228 can be four, but is not limited to four, and can be designed according to actual needs. And each positioning member 228 is provided with a positioning hole 229, and the positioning member 228 and the positioning hole 229 are used to fix the filter bag body 221 on the positioning cross bar 2417 of the sealing structure 240.

[0075] Combination Figure 3 and Figure 5 As shown, the positioning cross bar 2417 passes through the positioning piece 228 of the filter bag body 221, ensuring that the connection between the filter bag body 221 and the sealing structure 240 is tight and stable. This helps prevent the filter bag body 221 from deflecting or loosening during the filter pressing process, thereby ensuring the filtering effect and the service life of the filter bag body 221. In addition, after the filter pressing is completed, when the sealing structure 240 opens the bottom of the filter bag body 221, the opening 225 of the filter bag body 221 can be propped open by the positioning piece 228, which helps the filter cake fall from the filter cavity.

[0076] Among them, the terms "upper" and "lower" are used to describe the relative position relationship of each structure in the accompanying drawings, which is only for the convenience of description and is not used to limit the scope of implementation of the present application. Changes or adjustments to their relative relationships should also be regarded as the scope of implementation of the present application without substantially changing the technical content.

[0077] It should be noted that: in this application, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0078] In addition, in this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0079] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A filter bag assembly, characterized in that: include: A filter bag body, the filter bag body comprising two main filter surfaces arranged opposite to each other, and one end of the filter bag body having an opening; A sealing structure is located at the open end of the filter bag body, and the sealing structure is used to seal the open end when the filter bag body is in feeding or filtering, and is used to open the open end when the filter bag body is unloading.

2. The filter bag assembly according to claim 1, characterized in that: The sealing structure comprises a pressing member, wherein the pressing member comprises a first pressing strip and a second pressing strip arranged opposite to each other, and at least one filter bag body is disposed between the first pressing strip and the second pressing strip; The first compression strip and the second compression strip are respectively matched with the bottom ends of the two main filter surfaces, and the first compression strip and the second compression strip are fitted together to seal the opening, and the first compression strip and the second compression strip are separated to open the opening.

3. The filter bag assembly according to claim 2, characterized in that: The sealing structure also includes a first driving mechanism, which is used to fit the first compression strip and the second compression strip together to seal the opening, and to separate the first compression strip and the second compression strip to open the opening when the filter bag body is unloading.

4. The filter bag assembly according to claim 3, characterized in that: Both ends of the first pressing strip and the second pressing strip are provided with connecting pieces, and the connecting pieces are connected to the first driving mechanism; The connecting member is arranged on a surface of the first pressing strip facing away from the second pressing strip, and on a surface of the second pressing strip facing away from the first pressing strip.

5. The filter bag assembly according to claim 4, characterized in that: The first driving mechanism includes a cylinder and a connecting mechanism, wherein the cylinder is connected to the pressing member through the connecting mechanism, and the cylinder drives the connecting mechanism so that the pressing member seals or opens the opening of the filter bag body; Each of the first driving mechanisms also includes a push rod, one end of which is connected to the cylinder, and the other end of which abuts against the connecting mechanism. The cylinder drives the push rod to abut against the connecting mechanism so that the clamping member closes or opens the opening of the filter bag body.

6. The filter bag assembly according to claim 5, characterized in that: The pressing member further comprises at least one third pressing strip, the third pressing strip being located between the first pressing strip and the second pressing strip, and the third pressing strip being matched with the bottom end of one of the main filter surfaces of the filter bag body; At least one filter bag body is arranged between two adjacent pressing members.

7. The filter bag assembly according to claim 6, characterized in that: The connecting mechanism comprises a first connecting rod and a second connecting rod, the bottom end of the first connecting rod is respectively connected to the connecting pieces on the first pressing strip and the second pressing strip, the top end of the first connecting rod is connected to the cylinder, and the first connecting rod is driven by the cylinder so that the first pressing strip and the second pressing strip seal or open the opening of the filter bag body; The second connecting rod is arranged at one end of each of the pressing members so as to connect each of the first pressing strip, the second pressing strip and the third pressing strip.

8. The filter bag assembly according to claim 7, characterized in that: A groove is provided on a surface of the first pressing strip facing the second pressing strip, and a protrusion is provided on a surface of the second pressing strip facing the first pressing strip; The protrusion is provided on a surface of the third pressing strip facing the first pressing strip, and the groove is provided on a surface of the third pressing strip facing the second pressing strip.

9. The filter bag assembly according to any one of claims 2 to 8, characterized in that: Each of the pressing members is provided with a mounting hole, the mounting hole is used for allowing a positioning cross bar to pass through, and the bottom end of the filter bag body is sleeved on the positioning cross bar; Positioning pieces are respectively arranged on both sides of the bottom end of the filter bag body, and positioning holes are arranged on the positioning pieces, and the positioning holes are used for allowing the positioning cross bar to pass through.

10. A filter press, characterized in that: include: A frame, a pressure plate, and a filter bag assembly as described in any one of claims 1 to 9, wherein the filter bag assembly is movably arranged on the frame, and the filter bag assembly is pushed by the pressure plate for filtering.

Images