A high-temperature pleated filter cartridge and its preparation method, and a pleated dust collector

Abstract

The embodiments of the present application provide a high-temperature pleated filter cartridge, a preparation method thereof, and a pleated dust collector, and relate to the field of dust collectors. The high-temperature pleated filter cartridge includes an inner liner tube with openings at both ends, and the inner liner tube is provided with filter holes; an end cap plug is inserted at one end of the inner liner tube, and a through hole is provided on the end cap plug, and the inner liner tube is connected to the outside through the through hole, and an end cap sleeve is provided on the outer end of the inner liner tube, and the end cap plug and the end cap sleeve are fixedly connected, and a colloid is provided between the end cap sleeve and the end cap plug; a sealing assembly for sealing the inner liner tube is provided at the other end of the inner liner tube. The various components of the high-temperature pleated filter cartridge in the embodiments of the present application are tightly connected and are not easily affected by temperature.

Description

Technical Field

[0001] The present application relates to the field of dust collectors, and more specifically, to a high-temperature pleated filter cartridge and a preparation method thereof, and a pleated dust collector. Background Art

[0002] Compared to bag filters, pleated dust collectors are widely used due to their larger filtration area, lower filtration velocity, higher flue gas throughput, and ease of installation. The core component of a pleated dust collector is its pleated filter cartridge, which typically consists of a pleated inner liner and end caps that secure the inner liner.

[0003] The existing method of connecting the liner and end cap is to apply a small amount of glue on the contact surface of the two to bond them together. This arrangement is greatly affected by the working environment. In high-temperature environments, the end cap of the pleated filter cartridge is prone to falling off, which can seriously affect the operation of the pleated dust collector. Summary of the Invention

[0004] The embodiments of the present application provide a high-temperature pleated filter cartridge, a preparation method thereof, and a pleated dust collector. The components of the high-temperature pleated filter cartridge are tightly connected and are not easily affected by temperature.

[0005] In the first aspect, an embodiment of the present application provides a high-temperature pleated filter cartridge, which includes an inner lining tube with openings at both ends, and filter holes are provided on the inner lining tube; an end cover plug is inserted at one end of the inner lining tube, and a through hole is provided on the end cover plug, and the inner lining tube is connected to the outside through the through hole, and an end cover sleeve is provided on the end outer sleeve of the inner lining tube, the end cover plug and the end cover sleeve are fixedly connected, and a colloid is provided between the end cover sleeve and the end cover plug; a sealing assembly for sealing the inner lining tube is provided at the other end of the inner lining tube.

[0006] In the above implementation process, when the high-temperature pleated filter cartridge is working, one end of the liner tube is closed by the sealing assembly, and the other end can be connected to the outside world through the through hole on the end cover plug, and then air is extracted from the through hole. The gas can pass through the filter hole through the liner tube to reach the through hole. At this time, the liner tube can play a cleaning role.

[0007] In addition, the end cover plug can also support and fix the inner liner tube to ensure that the inner liner tube is not easily deformed. Moreover, the end cover plug and the inner liner tube are not bonded together by glue, so they are not easily affected by high temperature and fall off.

[0008] In addition, since an end cover sleeve is also provided on the outside of the end cover plug, and the end cover sleeve and the end cover plug are fixedly connected, a sufficient amount of colloid can be accommodated between the end cover sleeve and the end cover plug, which can better prevent the liner tube and the end cover plug from falling off.

[0009] In a possible implementation, a side of the end cap plug away from the liner tube extends toward the outside of the liner tube to form an abutment portion, and the end cap sleeve is connected to an edge of the abutment portion.

[0010] In the above implementation process, the abutment portion can not only provide a connection point between the end cover sleeve and the end cover plug, but also prevent the end cover plug from extending too far into the inner liner tube, thereby avoiding the end cover plug from falling into the inner liner tube and affecting the filtering effect of the filter cartridge.

[0011] In a possible implementation, the end cap plug and the end cap sleeve are welded.

[0012] In the above implementation process, the use of welding is conducive to a tighter connection between the end cover plug and the end cover sleeve.

[0013] In a possible implementation, the distance between the end cover sleeve and the inner liner is 0.01-0.05 mm, and the width of the end cover sleeve is 92.5-92.7 mm.

[0014] In the above implementation process, the above-mentioned sleeve distance and the width of the end cover sleeve can accommodate more colloids and can better prevent the liner tube and the end cover plug from falling off.

[0015] In one possible implementation, the sealing assembly includes a connecting tube with openings at both ends, a boss being circumferentially arranged on the outer wall of the connecting tube, one end of the connecting tube being inserted into the liner tube, and the other end being blocked by the boss and located outside the liner tube, and a sealing cover being provided at the end of the connecting tube located outside the liner tube.

[0016] In the above implementation, the connecting tube in the sealing assembly is inserted into the sealed end of the liner tube, supporting and securing the liner tube. The connecting tube and end cap plug, when used together, ensure that the liner tube is less susceptible to deformation. The circumferential boss of the connecting tube prevents the connecting tube from excessively extending into the liner tube, thereby preventing any impact on the filter cartridge's filtration performance. Furthermore, the sealing cap at the end of the connecting tube provides a seal, preventing air leakage from the sealed end of the liner tube.

[0017] In one possible implementation, a slot is provided at one end of the connecting tube outside the liner tube, and a buckle matching the slot is provided on the sealing cover. The connecting tube and the sealing cover are detachably connected via the slot and the buckle.

[0018] In the above implementation process, the sealing cover and the connecting pipe are detachably connected through the card slot and the buckle, which is more conducive to the later cleaning and maintenance of the high-temperature pleated filter cartridge.

[0019] In a possible implementation, the inner lining tube is provided with a filter material, which is glass fiber cloth or polyester non-woven fabric covered with a PTFE (Polytetrafluoroethylene) membrane; and / or the material of the colloid is polyurethane.

[0020] In this implementation, materials such as PTFE-coated fiberglass cloth and polyester nonwovens offer advantages such as high filtration accuracy, high tensile strength, high temperature resistance, high efficiency, low resistance, and long life, making them particularly suitable for use as filter media in liner tubes. Polyurethane has excellent adhesion, enabling better bonding between the end cap and the liner tube.

[0021] In the second aspect, an embodiment of the present application provides a method for preparing a high-temperature pleated filter cartridge, which includes the following steps: fixing an end cover plug to one end of the liner tube, then fixing the end cover sleeve and the end cover plug, and then injecting a colloid between the end cover sleeve and the end cover plug; using a sealing assembly to seal the other end of the liner tube.

[0022] In one possible implementation, the end cap plug and the inner liner are fixed by welding; and / or the end cap sleeve and the end cap plug are fixed by welding; optionally, the frequency during welding is 0.5 to 1.0.

[0023] In the above implementation process, welding is used to secure the end cap plug inserted into the inner liner to the inner liner, which can better prevent the end cap plug from falling out and does not affect the filtering effect of the inner liner. The injected colloid also plays a fixing role. The combination of colloid bonding and welding can ensure that the end cap plug and the inner liner are less likely to fall out. Setting the welding frequency within the range of 0.5 to 1.0 can achieve good weld strength.

[0024] On the third aspect, an embodiment of the present application provides a pleated dust collector, which includes a shell, an air suction device and the above-mentioned high-temperature pleated filter cartridge. The high-temperature pleated filter cartridge is located inside the shell, and the air suction device is connected to the high-temperature pleated filter cartridge through a through hole.

[0025] In one possible implementation, a pleated dust collector containing the above-mentioned high-temperature pleated filter cartridge has a longer service life and a lower failure rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 This is a schematic structural diagram of a high-temperature pleated filter cartridge provided in an embodiment of the present application.

[0028] Icons: 001-high-temperature pleated filter cartridge; 100-liner tube; 110-filter hole; 120-intake end; 130-sealing end; 200-end cover plug; 210-abutment part; 300-end cover sleeve; 400-sealing assembly; 410-connecting pipe; 411-boss; 412-slot; 420-blocking plate; 430-sealing cover; 431-snap. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments derived by persons of ordinary skill in the art based on the embodiments in this application without creative effort are also within the scope of protection of this application.

[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0033] In the description of this application, it should be noted that the terms "upper", "lower", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of the application is usually placed when in use. They 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, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on this application.

[0034] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. 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 internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0035] First embodiment

[0036] Please see Figure 1 The present embodiment provides a high-temperature pleated filter cartridge 001, which includes an inner liner tube 100 with openings at both ends. The inner liner tube 100 is provided with filter holes 110, and the two ends of the inner liner tube 100 are respectively an air intake end 120 and a sealing end 130.

[0037] In the embodiment of the present application, an end cap plug 200 is inserted into the air intake end 120, and a through hole is provided on the end cap plug 200 to ensure that the inner liner 100 can communicate with the outside through the through hole. An end cap sleeve 300 is provided on the outer cover of the air intake end 120 of the inner liner 100, and the end cap plug 200 and the end cap sleeve 300 are fixedly connected, and a colloid is provided between the end cap sleeve 300 and the end cap plug 200. In addition, as an example, in the present embodiment, the end cap plug 200 extends toward the outside of the inner liner 100 away from the end of the inner liner 100 to form an abutment portion 210, and the end cap sleeve 300 is connected to the edge of the abutment portion 210. In addition, in the present embodiment, the end cap sleeve 300 and the edge of the abutment portion 210 are generally connected by welding. Of course, in some other embodiments, the end cap sleeve 300 and the end cap plug 200 can also be integrally formed. The end cover plug 200 can support and fix the inner liner tube 100, ensuring that the inner liner tube 100 is not easily deformed. The abutment portion 210 on the end cover plug 200 can prevent the end cover plug 200 from excessively extending into the inner liner tube 100, thereby avoiding the end cover plug 200 from falling into the inner liner tube 100 and affecting the filtering effect of the filter cartridge.

[0038] Because the end cap plug 200 and the inner liner 100 are not glued together, they are less susceptible to high-temperature detachment. Furthermore, since the end cap plug 200 is also covered with an end cap sleeve 300, and the end cap sleeve 300 and the end cap plug 200 are connected by an abutment 210, an area for glue injection is formed between the end cap sleeve 300, the abutment 210, and the end cap plug 200. Compared to the prior art method of coating the colloid on the sidewall, this embodiment has a dedicated area for holding the colloid, which can accommodate a sufficient amount of colloid, thereby better preventing the inner liner 100 and the end cap plug 200 from detaching. The colloid is generally made of highly viscous polyurethane. To accommodate the sufficient amount of colloid, the distance between the end cap sleeve 300 and the inner liner 100 is 20 to 32 mm, and the width of the end cap sleeve 300 is 178 to 182 mm. As an example, in this embodiment, the distance between the end cover sleeve 300 and the inner liner pipe 100 is 28 mm, and the width of the end cover sleeve 300 is 178 mm.

[0039] In the embodiment of the present application, a sealing assembly 400 capable of sealing is provided at the sealing end 130. Moreover, as an example, the sealing assembly 400 includes a connecting pipe 410 with openings at both ends, and a boss 411 is provided on the outer wall of the connecting pipe 410 along the circumferential direction. One end of the connecting pipe 410 is inserted into the inner liner pipe 100, and the other end is blocked by the boss 411 and is located outside the inner liner pipe 100. The connecting pipe 410 inserted into the inner liner pipe 100 can cooperate with the end cover plug 200 to support and fix the inner liner pipe 100, ensuring that the inner liner pipe 100 is less likely to deform. The end of the connecting pipe 410 located outside the inner liner pipe 100 can be connected to the sealing cover 430, and the connected sealing cover 430 can play a sealing role to prevent air leakage from the sealing end 130 of the inner liner pipe 100. In addition, in this embodiment, a card slot 412 is provided at one end of the connecting pipe 410 located outside the inner liner pipe 100, and a buckle 431 matching the card slot 412 is provided on the sealing cover 430. The connecting pipe 410 and the sealing cover 430 are detachably connected through the card slot 412 and the buckle 431, which is more conducive to the later cleaning and maintenance of the high-temperature pleated filter cartridge 001.

[0040] In addition, in this embodiment, a blocking plate 420 is sleeved on the outer wall of the connecting pipe 410 . The blocking plate 420 is located between the sealing cover 430 and the boss 411 and abuts against the boss 411 , thereby preventing the sealing cover 430 from abutting against the boss 411 .

[0041] In addition, in the present embodiment, the filter material on the inner liner tube 100 is a glass fiber cloth with a PTFE surface coating. The glass fiber cloth with a PTFE surface coating has the advantages of high filtration accuracy, high tensile strength, high temperature resistance, high efficiency and low resistance, and long life, and is more suitable as a filter material on the inner liner tube 100. However, since the end connection parts of the glass fiber cloth are more likely to fall off under high temperature conditions, the existing technology basically does not use glass fiber cloth. However, since in the present embodiment, the connection between the end cover plug 200 and the inner liner tube 100 can be made more secure through structures such as the end cover plug 200 and the glue injection groove, the surface of the glass fiber cloth can be well thermally composited with PTFE in the present embodiment to prepare the inner liner tube 100.

[0042] This embodiment also provides a method for preparing a high-temperature pleated filter cartridge 001, which comprises the following steps:

[0043] Take an inner liner tube 100 with both ends open, and perform the following operations on the suction end 120 and the sealing end 130 of the inner liner tube 100:

[0044] For the suction end 120 of the inner liner tube 100 : first fix the end cover plug 200 to one end of the inner liner tube 100 , then fix the end cover sleeve 300 and the end cover plug 200 , and then inject colloid between the end cover sleeve 300 and the end cover plug 200 .

[0045] Specifically, welding is typically used to secure the end cap plug 200 to the inner liner tube 100. Welding is also typically used to secure the end cap sleeve 300 to the end cap plug 200. Welding prevents the end cap plug 200 from falling and does not affect the filtration performance of the inner liner tube 100. Furthermore, the injected colloid also serves to secure the end cap plug 200. The combined use of colloid bonding and welding ensures that the end cap plug 200 and inner liner tube 100 are less likely to fall off.

[0046] For the sealed end 130 of the liner pipe 100 : use the sealing assembly 400 to seal the sealed end 130 of the liner pipe 100 .

[0047] Specifically, in this embodiment, one end of the connecting tube 410 is first inserted into the inner liner tube 100 until the boss 411 of the connecting tube 410 abuts against the inner liner tube 100, and then the inner liner tube 100 and the connecting tube 410 are welded; after welding is completed, the blocking plate 420 is sleeved on the outer wall of the connecting tube 410 from the other end of the connecting tube 410, and then the blocking plate 420 is pushed closer to the inner liner tube 100 until the blocking plate 420 abuts against the boss 411 of the connecting tube 410, and finally the sealing cover 430 is clamped to the end of the connecting tube 410 that is not inserted into the inner liner tube 100 using the card slot 412 and the buckle 431 structure.

[0048] During the entire preparation process, the welding frequency is generally controlled within the range of 0.5 to 1.0. As an example, in this embodiment, the welding frequency is 0.6, so that the connection force between the components can reach 1500N.

[0049] In addition, in the embodiment of the present application, welding is generally performed using a six-point welding method, and the specific operating steps are: on the outer wall of the liner pipe 100, six evenly distributed points are selected along its circumferential direction, and then welding is performed through these six points.

[0050] Second embodiment

[0051] Please see Figure 1 The embodiment of the present application also provides a pleated dust collector, which includes a shell, an air suction device and the high-temperature pleated filter cartridge 001 in the first embodiment. The high-temperature pleated filter cartridge 001 is located inside the shell, and the air suction end 120 of the high-temperature pleated filter cartridge 001 is connected to the air suction device.

[0052] In this embodiment, since the components of the high-temperature pleated filter cartridge 001 in the first embodiment are less likely to fall off, the pleated dust collector in this embodiment has a longer service life and a lower failure rate.

[0053] The working principle of the pleated dust collector in this embodiment is as follows:

[0054] Start the suction device first. Since the sealing end 130 of the high-temperature pleated filter cartridge 001 away from the suction device is closed, the gas can only pass through the filter holes 110 and the through holes to reach the suction device. At this time, the inner liner tube 100 can play a filtering role.

[0055] During operation, the end cover plug 200 and the connecting tube 410 can support and fix the liner tube 100, ensuring that the liner tube 100 is not easily deformed.

[0056] In addition, during operation, although the temperature of the suction end 120 of the filter cartridge continues to rise, since the end cover plug 200 and the inner liner tube 100 are not bonded together by glue, they are not easily affected by high temperature and fall off; and there is sufficient colloid between the end cover sleeve 300 and the end cover plug 200, which also makes it difficult for the inner liner tube 100 and the end cover plug 200 to fall off.

[0057] The above are merely examples of the present application and are not intended to limit the scope of protection of the present application. Those skilled in the art will appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A high-temperature pleated filter cartridge, characterized in that: It includes an inner liner tube with openings at both ends, and filter holes are provided on the inner liner tube; An end cap plug is inserted into one end of the inner liner tube, and a through hole is provided on the end cap plug, through which the inner liner tube is connected to the outside world, and an end cap sleeve is provided on the outer end of the inner liner tube, the end cap plug and the end cap sleeve are fixedly connected, and a colloid is provided between the end cap sleeve and the end cap plug; A sealing assembly for sealing the inner liner tube is provided at the other end of the inner liner tube; the sealing assembly includes a connecting tube with openings at both ends, and a boss is provided on the outer wall of the connecting tube along the circumferential direction. One end of the connecting tube is inserted into the inner liner tube, and the other end is blocked by the boss and located outside the inner liner tube. A sealing cover is provided at the end of the connecting tube located outside the inner liner tube.

2. The high-temperature pleated filter cartridge according to claim 1, characterized in that: The end cap plug extends toward the outside of the liner tube on one side away from the liner tube to form an abutment portion, and the end cap sleeve is connected to an edge of the abutment portion.

3. The high-temperature pleated filter cartridge according to any one of claims 1 to 2, characterized in that: The end cover plug and the end cover sleeve are welded.

4. The high-temperature pleated filter cartridge according to claim 1, characterized in that: The distance between the end cover sleeve and the inner liner is 0.01-0.05 mm, and the width of the end cover sleeve is 92.5-92.7 mm.

5. The high-temperature pleated filter cartridge according to claim 1, characterized in that: A card slot is provided at one end of the connecting pipe located outside the inner lining pipe, and a buckle matching the card slot is provided on the sealing cover. The connecting pipe and the sealing cover are detachably connected via the card slot and the buckle.

6. The high-temperature pleated filter cartridge according to claim 1, characterized in that: The inner lining tube is provided with a filter material, and the filter material is glass fiber cloth or polyester non-woven fabric covered with PTFE membrane; And / or, the material of the colloid is polyurethane.

7. A method for preparing the high-temperature pleated filter cartridge according to claim 1, characterized in that: It includes the following steps: Fixing the end cap plug to one end of the inner liner tube, then fixing the end cap sleeve and the end cap plug, and then injecting colloid between the end cap sleeve and the end cap plug; The other end of the liner pipe is sealed using a sealing assembly.

8. The method for preparing a high-temperature pleated filter cartridge according to claim 7, wherein: The end cap plug and the inner liner are fixed by welding; and / or the end cap sleeve and the end cap plug are fixed by welding.

9. The method for preparing a high-temperature pleated filter cartridge according to claim 8, characterized in that: The frequency during welding is 0.5 to 1.

0.

10. A pleated dust collector, characterized in that: It comprises a shell, an air suction device and the high-temperature pleated filter cartridge according to any one of claims 1 to 6, wherein the high-temperature pleated filter cartridge is located inside the shell, and the air suction device is connected to the high-temperature pleated filter cartridge through the through hole.

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