A method and apparatus for manufacturing an air filter cartridge

Abstract

The application belongs to the field of air filter element manufacturing, and specifically discloses a manufacturing method, a manufacturing device and an air filter cartridge of an air filter element. The manufacturing method comprises the following steps: S1. pressing marks on both sides of a glass fiber filter material; S2. intermittently spraying glue on both sides of the glass fiber filter material, so that the marks on the glass fiber filter material are discontinuously distributed with linear adhesive; S3. pleating the filter material with the marks and the adhesive, so that the pleats are fixed through the adhesive, thereby forming filter cakes; S4. moving and winding the filter cakes, synchronously bonding breathable film layers on both sides of the filter cakes, and then connecting the first end and the second end of the filter cakes to form a cylindrical air filter element. The air filter element adopts an inner and outer surface film coating structure, effectively solving the problem that high-efficiency glass fiber material is prone to curling and breaking during the manufacturing process of the filter element.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of air filter element manufacturing, and more particularly relates to an air filter element manufacturing method, a manufacturing device, and an air filter cartridge. BACKGROUND

[0002] With the rapid development of gas turbine equipment towards high efficiency, reliability, zero pollution and other needs, the requirements of gas turbine equipment for air quality are becoming higher and higher; and the air filter element configured at the inlet of the gas turbine equipment is the only defense line for air quality guarantee, and its filtering efficiency also needs to be improved into the high efficiency sequence with the development needs of the gas turbine equipment.

[0003] At present, the air inlet of the gas turbine equipment is usually configured with a cylindrical air filter element. The cylindrical air filter element needs to be wound around the filter cake due to the manufacturing process characteristics. The traditional manufacturing material is basically plant fiber or chemical fiber material. Such material has the characteristics of high tensile strength, high toughness and good stiffness, which is beneficial to the mechanical bending of the material. However, due to the forming process characteristics of the fiber material, the fiber diameter is generally large, and it is difficult to make ultra-fine fibers, so that the filtering efficiency of the cylindrical air filter element can only reach the level of coarse and medium efficiency, and it is difficult to improve the filtering efficiency to the high efficiency sequence.

[0004] In the related art, glass fiber is a material that can be used as high efficiency and ultra-high efficiency filter material, but glass fiber material itself has the characteristics of poor fiber toughness and low strength, which is easy to break and fall off in the mechanical forming of the filter material, so that the glass fiber material is difficult to be used for the manufacturing of the cylindrical air filter element. SUMMARY

[0005] In view of the defects or improvement needs of the prior art, the present application provides an air filter element manufacturing method, a manufacturing device and an air filter cartridge, aiming to solve the problem that glass fiber material is difficult to be used for the manufacturing of high efficiency cylindrical air filter element.

[0006] The air filter element manufacturing method provided by the present application comprises the following steps:

[0007] S1. pressing indentations on both sides of the glass fiber filter material;

[0008] S2. intermittently spraying glue on both sides of the glass fiber filter material, so that the indentations of the glass fiber filter material are discontinuously distributed with linear adhesive;

[0009] S3. pleating the filter material with the indentations and the adhesive, so that the pleats are fixed by the adhesive, thereby forming a filter cake;

[0010] S4. moving and winding the filter cake, synchronously bonding a breathable film layer on both sides of the filter cake, and then connecting the first end and the second end of the filter cake to form a cylindrical air filter element.

[0011] Compared with the prior art, the above technical scheme conceived by the present application has the following advantages: by adopting the structure of film covering both sides of the filter cake and combining with the intermittent glue pouring process, the glass fiber filter material is not easy to be broken and fall off under the protection and reinforcement of the glue and the film layer, and the anti-wrinkling and solidification strength of the filter material is improved; the film layer provides a protective film for the filter cake, facilitating the subsequent assembly of the filter element, avoiding damage and failure of the filter cake due to mechanical friction of the filter cake with the subsequently added inner and outer protective nets and other structures, and at the same time, the film layer forms a rough filter layer on the surface of the filter cake, enhancing the environmental adaptability of the air filter element under complex working conditions such as high oil mist and high dust.

[0012] As a further optimization, in step S2, when intermittent glue pouring is performed, the glue is discontinuously distributed on the convex surface or the concave surface of the indentation along the indentation of the glass fiber filter material, the glue extends to both sides with the indentation as the center line, and the extended glue does not touch the adjacent indentation.

[0013] By adopting the above technical scheme, the position of the glue segment generated by intermittent glue pouring is specially designed, which has at least three effects. First, the glue can improve the structural stability of the filter material, ensuring the smooth progress of the subsequent pleating operation of the filter material. Second, the glue can fix the wrinkles after solidification, and the glue can separate the filter paper to prevent the wrinkles from being brought together to reduce the filtration area. Third, the intermittent glue pouring process ensures the formation of stable airflow channels in the filter element body, prevents the filter element from being wrinkled under the washing of the airflow, and forms interconnected airflow channels inside the filter wrinkles, which is beneficial to reducing the air inlet resistance.

[0014] As a further optimization, the film layer is elastically tensioned from one side of the filter cake to the opposite side of the filter cake, and the middle segment of the film layer is abutted by the front end of the filter cake.

[0015] By adopting the above technical scheme, since the film layer spans both sides of the filter cake, and one end of the film layer is in an elastically tensioned state, when winding is performed, the middle segment of the film layer is wound with the filter cake, and then the film layers on both sides of the filter cake are synchronously bonded to both sides of the filter cake, so that the film layer not only protects the filter cake and prevents the filter cake surface from being easily worn during winding, but also fixes the winding form of the filter cake, so that the filter cake remains in the wound state under the reinforcement of the film layers on both sides.

[0016] The second aspect of the present application provides a kind of air filter element production equipment adopting the following technical scheme:

[0017] A kind of air filter element production equipment, comprising:

[0018] Indentation device for pressing indentation on both sides of glass fiber filter material;

[0019] Glue injection device, for injecting intermittent glue to the glass fiber filter material at the indentation;

[0020] Ruffling device, for ruffling the glass fiber filter material with indentation, and fixing the ruffled glass fiber filter material by the glue at the indentation to form filter cake;

[0021] Rolling film device, for rolling the filter cake, and synchronously coating the two sides of the filter cake during the rolling process.

[0022] By adopting the above technical solutions, after the glass fiber filter material is indented on both sides by the indentation device, and the intermittent glue is injected to the glass fiber filter material by the glue injection device and the ruffling device to form the wrinkled filter cake, the filter cake is bent and the air-permeable film layers are synchronously adhered to the two sides of the filter cake by the rolling film device to form a cylinder, so that the glass fiber filter material is not prone to breaking and falling off under the reinforcement of the glue and the film layers, and the high-quality and high-yield rapid manufacturing of the efficient cylinder type air filter element based on the glass fiber filter material is realized.

[0023] As a further preferred, the rolling film device comprises:

[0024] The shaping tool has a cylindrical inner cavity, and a feeding port and a discharging port communicating with the cylindrical inner cavity;

[0025] The glue dropping mechanism is arranged at the feeding port and is used for dropping glue on the two sides of the filter cake or the film layers on the two sides of the filter cake;

[0026] The film feeding mechanism is used for guiding the film layers to pass through the feeding port, and making the film layers be elastically tensioned from one side of the filter cake to the opposite side of the filter cake;

[0027] The traction mechanism is used for pulling the film layers at the feeding port and the filter cake into the cylindrical inner cavity, so that the film layers and the filter cake are rolled and shaped along the inner wall of the cylindrical inner cavity.

[0028] As a further preferred, the traction mechanism comprises:

[0029] The main shaft is rotationally connected in the shaping tool;

[0030] The traction rod is used for pulling the film layers and the filter cake;

[0031] The telescopic member connects the main shaft and the traction rod, and is used for adjusting the distance between the main shaft and the traction rod, so that the main shaft can drive the traction rod to move along the circumferential inner wall of the cylindrical inner cavity in the shaping tool when the main shaft rotates.

[0032] The air filter cylinder provided in the third aspect of the application adopts the following technical solutions:

[0033] An air filter cartridge comprises a cylindrical air filter element, both the inner side and the outer side of the air filter element are provided with protective nets;

[0034] The air filter element comprises a filter cake and a film layer adhered to the inner side and the outer side of the filter cake, the filter cake is formed by creasing the glass fiber filter material and then fixed by intermittent adhesive bonding.

[0035] In the formation of the filter cake with wrinkles, the adhesive is discontinuously distributed on the convex surface or the concave surface of the indentation of the glass fiber filter material, the adhesive extends to both sides with the indentation as the center line, and the extended adhesive does not touch the adjacent indentation. The adjacent two crests are fixed by the adhesive distributed on the convex surface or the concave surface of the indentation, and at the same time, the adjacent two crests are spaced by the adhesive distributed on the convex surface or the concave surface of the indentation.

[0036] Compared with the prior art, the air filter cartridge adopts glass fiber filter material as the main filter material, and the air filter element made of the glass fiber filter material has high filtration level. The filter cake structure with film on both sides is used, and the intermittent adhesive process is used. In terms of structure, the filter material can be reinforced to improve the structural stability of the filter material, and it is beneficial to form a gas flow channel that is interconnected on the inner side of the filter fold to prevent the filter cake from being folded under the scouring of the gas flow. In terms of performance, the air-permeable film layer can filter the air entering and exiting the filter cake, improve the filtration performance of the air filter element, and enhance the environmental adaptability of the air filter element in complex working conditions such as high oil mist and high dust.

[0037] As a further preferred, in the formation of the filter cake with wrinkles, the adhesive is distributed in a matrix on the same side surface of the glass fiber filter material.

[0038] By using the above technical solution, the position of the adhesive is specially designed, so that the adhesive can fix the filter material wrinkles after solidification, and the adhesive can also separate the filter paper to prevent the filter from being folded to reduce the filtration area. At the same time, it is also beneficial to form a gas flow channel that is interconnected on the inner side of the filter fold, which is beneficial to reduce the air inlet resistance, thereby ensuring the good filtration performance of the air filter element.

[0039] As a further preferred, in the formation of the filter cake with wrinkles, the adhesive at the adjacent two indentations is discontinuously distributed in a staggered manner.

[0040] By using the above technical solution, the staggered distribution of the adhesive is beneficial to the uniform reinforcement of the filter material, and is also beneficial to the formation and connection of the gas flow channel.

[0041] As a further preferred, the air filter cartridge further comprises end covers installed at both ends of the cylindrical air filter element, at least one of the end covers has an opening communicating with the inner side space of the air filter element.

[0042] Through adoption of the technical scheme, the end cover can reinforce the two ends of the filter core body, and the air after filtration can flow out along the opening for use by the gas turbine equipment.

[0043] Overall, compared with the prior art, the above technical scheme conceived by the present application mainly has the following technical advantages:

[0044] 1. The air filter core adopts an inner and outer surface film-coated structure, which can provide a rough filter layer on one hand to enhance the environmental adaptability of the air filter core under complex working conditions such as high oil mist and high dust, and on the other hand to improve the filter cake forming and solidification strength, solving the problems of easy curling and breaking of high-efficiency glass fiber material during filter core manufacturing and falling off into the downstream during use to cause air pollution.

[0045] 2. With the reinforcement of the adhesive and the film-coated layer, the filter core can be prevented from being folded under the scouring of the airflow, and the folding can be prevented from causing the reduction of the filtration area; and the special layout design of the adhesive is conducive to the formation of airflow channels in the inner side of the filter cake folds, which is conducive to the stability of the airflow channels, reduces the air intake resistance, and effectively prolongs the service life of the filter core body.

[0046] 3. Since the film-coated layer spans the two sides of the filter cake, and one end of the film-coated layer is in an elastic tension state, when winding, the filter cake drives the middle segment of the film-coated layer to wind, and then the film-coated layers on both sides of the filter cake are synchronously adhered to the two sides of the filter cake, so that the film-coated layer not only protects the filter cake and prevents the filter cake surface from being easily abraded during winding, but also fixes the winding form of the filter cake, so that the filter cake remains in the wound state under the reinforcement of the film-coated layers on both sides. BRIEF DESCRIPTION OF DRAWINGS

[0047] Figure 1 is a structural schematic view of an air filter core provided by the embodiment of the present application;

[0048] Figure 2 is a top view of filter material with adhesive in a filter cake glue pouring process provided by the embodiment of the present application;

[0049] Figure 3 is a side view of filter material with adhesive in a filter cake glue pouring process provided by the embodiment of the present application;

[0050] Figure 4 is a side view of a filter cake in a filter cake fold fixing process provided by the embodiment of the present application;

[0051] Figure 5 is a schematic view of a filter cake film-coating and winding forming process provided by the embodiment of the present application.

[0052] In all the drawings, the same reference signs are used to represent the same elements or structures, wherein:

[0053] 101, end cap; 102, outer protective net; 103, air filter element; 104, inner protective net; 105, end cap; 201, glass fiber filter material; 202, indentation; 203, upper surface hot melt adhesive; 204, lower surface hot melt adhesive; 301, elastic damper; 302, film coating layer; 303, filter cake; 304, shaping tool; 305, main shaft; 306, telescopic member; 307, traction rod; 308, hot melt adhesive head. DETAILED DESCRIPTION

[0054] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0055] The present application is further described below in combination with the drawings and examples. Figures 1-5 The present application is further described below in combination with the drawings and examples.

[0056] Referring to Figures 1-5 The present application discloses a method for manufacturing an air filter element. The method comprises the following steps:

[0057] S1. Indentations 202 are pressed on both sides of the glass fiber filter material 201.

[0058] Specifically, the glass fiber filter material 201 is made of high-efficiency glass fiber material, and preferably a flexible non-destructive indentation device is used to press the indentations 202 (i.e. filter cake creases) on both sides of the glass fiber filter material 201, and the indentations 202 appear alternately on both sides of the glass fiber filter material 201; that is, in the adjacent two indentations 202 of the glass fiber filter material 201, one indentation 202 is on one side of the glass fiber filter material 201, and the adjacent other indentation 202 is on the opposite side of the glass fiber filter material 201.

[0059] As a preferred, the indentations 202 are arranged at intervals along the length direction of the glass fiber filter material 201, and the length direction of the indentation 202 is preferably parallel to the width direction of the glass fiber filter material 201.

[0060] S2. Intermittent glue is applied to both sides of the glass fiber filter material 201, so that the indentations 202 of the glass fiber filter material 201 are discontinuously distributed with linear adhesive.

[0061] Specifically, the glass fiber filter material 201 with indentations 202 is uniformly conveyed through the glue application device by a conveying belt, and the multiple hot melt adhesive heads arranged above and below in the glue application device use an interval glue application control mode to inject adhesive with the same length and interval on both surfaces of the glass fiber filter material 201.

[0062] As preferred, the adhesive is discontinuously distributed on the convex surface or the concave surface of the indentation 202 along the extension direction of the indentation 202 of the glass fiber filter 201, and the adhesive extends to both sides of the indentation 202 with the indentation 202 as the center line, and the extended adhesive does not touch the adjacent indentation 202, and the adhesive is preferably hot melt adhesive.

[0063] As preferred, the adhesive at the two adjacent indentations 202 is discontinuously distributed in a staggered manner.

[0064] As preferred, the length of the adhesive is not less than the interval between the two adjacent indentations 202; for example, the two sides of the adhesive can each be sprayed to a distance of half the indentation 202.

[0065] For the convenience of understanding, a distribution form of the adhesive is shown in Figures 2-3 , the upper surface of the glass fiber filter 201 is formed with an upper surface hot melt adhesive 203, and the lower surface is formed with a lower surface hot melt adhesive 204, and the upper surface hot melt adhesive 203 and the lower surface hot melt adhesive 204 are in a linear shape.

[0066] Under this design, when the glass fiber filter 201 is subsequently pleated to form a pleated structure, the inner side of the pleat tip can form a flow passage, avoiding the loss of filtration area caused by glue spraying, and at the same time, the amount of hot melt adhesive can be greatly reduced.

[0067] S3. The glass fiber filter 201 with indentations 202 and adhesive is pleated, and the pleats are fixed by the adhesive, thereby forming a pleated filter cake 303.

[0068] Specifically, the glass fiber filter 201 after glue spraying enters a mechanical pleating device downstream of the conveying belt, and the mechanical pleating device pleats the flat glass fiber filter 201 to form a sawtooth structure along the indentation 202; as the distance between the pleats gradually decreases, before the hot melt adhesive is cured, the hot melt adhesive at position A on the upper surface of the glass fiber filter 201 and the hot melt adhesive at position B on the upper surface of the glass fiber filter 201 will gradually approach and bond, and the hot melt adhesive at position C on the lower surface of the glass fiber filter 201 and the hot melt adhesive at position D on the lower surface of the glass fiber filter 201 will gradually approach and bond, and finally achieve the fixation between the filter pleats after curing; at the same time, the hot melt adhesive separates the filter surface of the glass fiber filter 201 to prevent the pleats from approaching and reducing the filtration area. Figure 4 Figure 4 In the, the direction indicated by the arrow is the airflow direction when the air filter is used subsequently.

[0069] S4. Moving and winding the filter cake 303, and synchronously bonding the breathable film layer 302 on both sides of the filter cake 303, and then connecting the first end and the second end of the filter cake 303 to form a cylindrical air filter 103.

[0070] Specifically, after spraying several lines of hot melt glue on the surface of the film layer 302 or both sides of the filter cake 303, the film layer 302 is directly attached to both sides of the formed filter cake 303. The hot melt glue applied in this step firmly bonds the pleat tips on both sides of the filter cake 303 to the film layer 302. After the filter cake 303 is bonded to the coarse film layer 302 on both sides, it enters the shaping tool. By rolling the filter cake 303 into a ring-shaped structure before the hot melt glue on the surface of the coarse film layer 302 solidifies, it is convenient for the subsequent installation of the cylindrical filter core, and solves the problem that the flat filter cake 303 cannot be rolled after the hot melt glue solidifies.

[0071] Among them, the film layer 302 adopts high-strength and high-air-permeability coarse fiber material, and the bonded film layer 302 can effectively fix the filter pleats to prevent the filter core from appearing during use.

[0072] As shown in Figure 5 As shown in

[0073] In this device, when the filter cake 303 that has completed the filter glue process enters the film coating process section of the device, the filter cake 303 contacts the film layer 302 and is fixed together on the traction rod 307 in the drum film coating device. This fixing method can use adhesive bonding, clamping, or any other feasible fixing method.

[0074] Then start the motor in the drum film coating device, rotate the main shaft 305 counterclockwise by the motor, and automatically adjust the length of the telescopic member 306 in the drum film coating device under program control to ensure that the traction rod 307 always fits the inner wall of the cylindrical shaping tool 304. Then the filter cake 303 is gradually guided into the cylindrical shaping tool 304 by the traction rod 307 and rotates along the inner wall. During the process, multiple hot melt glue heads on the upper and lower positions of the filter cake 303 are opened to evenly spray multiple lines of hot melt glue on the surface of the film layer 302. As the filter cake 303 moves, the film layer 302 is simultaneously attached to the filter cake 303 from the top and bottom and fixed on both sides of the filter cake 303, thereby forming a cylindrical air filter core 103.

[0075] In this step, preferably, the lower length of the film layer 302 (i.e. the unwound length of the film layer 302 below the filter cake 303) is set to be consistent with the length of the filter cake 303. When the filter cake 303 completes the film coating process, the lower film layer 302 is just flush with the filter cake 303, and after the film coating is completed, the fixing of the film layer 302 and the damper is directly released. The upper film layer 302 is cut at the end of the filter cake 303, thereby completing the film coating process of the entire filter cake 303. Then, the two end portions of the filter cake 303 after film coating are bonded and sewn, thereby completing the forming of the filter core body. The above operation can be repeated to realize the flow operation of the filter cake 303.

[0076] It should be emphasized that during the movement of the filter cake 303 by the device, the filter cake 303 moves synchronously with the upper and lower film layers 302. With the pulling force generated by the moving lower film layer 302, the elastic damper 301 gradually contracts to provide sufficient movement allowance for the lower film layer 302 of the filter cake 303. At this time, the lower film layer 302 is always in a flat state due to the pulling of the elastic damper 301, thereby ensuring that the film layer 302 has good adhesion quality.

[0077] Of course, in some preferred embodiments, the film layer 302 on the upper part of the filter cake 303 can also be in a tensioned state. For example, the upper film roll is tensioned by a torsion spring, so that both ends of the film layer 302 are in a tensioned state.

[0078] In addition, when an air filter cartridge containing the air filter core 103 needs to be made, a protective net can be additionally installed on the inner side and the outer side of the filter body 103 after the above steps are completed, end covers are additionally installed at both ends of the filter body 103, and at least one end cover has an opening connected to the inner space of the filter body 103.

[0079] For example, one end cover of the filter body 103 is a through end cover 101, and the center of the end face of the through end cover 101 has an opening. The other end cover is a stop end cover 105, which does not have an opening. The protective net specifically includes an inner protective net 104 and an outer protective net 102.

[0080] The embodiment of the present application also discloses a manufacturing device of an air filter core.

[0081] Reference Figure 5The air filter core manufacturing equipment includes an indentation device, a glue injection device, a pleating device, and a drum film covering device. The indentation device is used for pressing the two sides of the glass fiber filter material 201 to generate indentations 202. The glue injection device is used for injecting intermittent adhesive at the indentations 202 of the glass fiber filter material 201. The pleating device is used for pleating the glass fiber filter material 201 with the indentations 202, so that the pleated glass fiber filter material 201 is fixed by the adhesive at the indentations 202 to form a filter cake 303. The drum film covering device is used for winding the filter cake 303 and synchronously covering the two sides of the filter cake 303 during the winding process. The indentation device, the glue injection device, and the pleating device are prior art and will not be described in detail.

[0082] Specifically, the drum film covering device includes a shaping tool 304, a glue dropping mechanism, a film feeding mechanism, and a traction mechanism. The shaping tool 304 has a cylindrical inner cavity. The shaping tool 304 is provided with an inlet and an outlet that communicate with the cylindrical inner cavity. The inlet is located on the circumferential surface of the shaping tool 304, and the outlet is located on the end face of the shaping tool 304. The shaping tool 304 is further connected with a guide structure at the inlet for guiding the filter cake 303 into the inlet, and is further provided with an opening near the inlet for the film layer 302 to pass from top to bottom.

[0083] The glue dropping mechanism is arranged at the inlet and includes two groups of hot melt glue heads for dropping glue on the two sides of the filter cake 303 or the film layers 302 on the two sides of the filter cake 303. In this embodiment, the film layers 302 on the two sides of the filter cake 303 are preferably dropped with glue. The film feeding mechanism is used for guiding the film layer 302, so that one end of the film layer 302 is elastically tensioned to one end of the filter cake 303 after passing through the inlet. The traction mechanism is used for pulling the film layer 302 and the filter cake 303 at the inlet into the cylindrical inner cavity, so that the film layer 302 and the filter cake 303 are rolled and shaped along the inner wall of the cylindrical inner cavity.

[0084] In this embodiment, the traction mechanism includes a main shaft 305, a traction rod 307, and a telescopic member 306. The main shaft 305 is rotatably connected in the shaping tool 304 and can be driven to rotate along the axial direction of the shaping tool 304 by a motor installed at the outer end of the shaping tool 304. The telescopic member 306 can be any one of an electric telescopic rod, a pneumatic push rod, an oil pressure rod, and a pneumatic spring rod. In this embodiment, the telescopic rod is a pneumatic spring rod. The spring telescopic rod is connected with the main shaft 305 and the traction rod 307 and can automatically adjust the length under the control of a controller to ensure that the traction rod 307 is always in contact with the inner wall of the cylindrical shaping tool 304. The traction rod 307 is used for pulling the film layer 302 and the filter cake 303 to enter the cylindrical inner cavity for winding into a drum.

[0085] In the embodiment, the film feeding mechanism comprises a film feeding roller and an elastic damper 301. The film feeding roller is rotationally fixed near the feeding port of the shaping tool 304, and its rotation axis is consistent with the rotation axis of the main shaft 305. The elastic damper 301 is arranged at the lower end of the shaping tool 304. The elastic damper 301 can be a spring damper or the like. For example, one end of the spring damper is connected with a row of fixing clamps, the film layer 302 is fixed and clamped by the fixing clamps, and the film layer 302 is tensioned by the spring damper.

[0086] In the embodiment, the film layer 302 is wound on the main shaft 305, and the upper end of the film roll is located at the feeding port. Then, the end of the film layer 302 passes around the film feeding roller, extends to the elastic damper 301 along the reserved opening in the shaping tool 304, and is fixed with the elastic damper 301. The elastic damper 301 can provide a certain tension to the film layer 302, so that the film layer 302 can be in a flat and unfolded state. When the filter cake 303 and the film layer 302 are pulled by the pulling rod, the elastic damper 301 can be contracted due to the pulling force, so that the end of the elastic damper 301 away from the shaping tool 304 is contracted to be close to the shaping tool 304, so that the film layer 302 below the filter cake 303 moves and adheres to the lower surface of the filter cake 303. Of course, when the pulling force is lost, the end of the elastic damper 301 away from the shaping tool 304 returns to the original state.

[0087] In some embodiments, the film roll wound on the main shaft 305 can also be tensioned in the shaping tool 304 by the torsional force of the elastic member such as a torsional spring, so that the films at the upper and lower ends of the filter cake 303 are in a tensioned state.

[0088] The application further discloses an air filter cartridge.

[0089] Referring to Figures 1-5 The air filter cartridge comprises a cylindrical air filter element 103. The inner side and the outer side of the air filter element 103 are provided with protective nets, which are specifically divided into an inner protective net 104 and an outer protective net 102. The air filter element 103 comprises a filter cake 303 and a film layer 302 adhered to the inner side and the outer side of the filter cake 303. The filter cake 303 is formed by pressing and pleating the glass fiber filter material 201 and then fixed by intermittent adhesive bonding.

[0090] For example, Figures 2-4As shown, when the filter cake 303 with wrinkles is formed, the adhesive is discontinuously distributed on the convex surface or the concave surface of the indentation 202 of the glass fiber filter material 201, and the adhesive extends to both sides of the indentation 202 as the center line, and the extended adhesive does not touch the adjacent indentation 202; preferably, the adhesive is centered on the crease line, and each side extends to half of the crease distance; meanwhile, the adjacent two crests are fixed by the adhesive distributed on the convex surface or the concave surface of the indentation 202, and the adjacent two crests are spaced by the adhesive distributed on the convex surface or the concave surface of the indentation 202. This arrangement allows the inner side of the crests to form a flow channel when the filter material forms a pleated structure, avoiding the loss of filtration area caused by the adhesive, while greatly reducing the amount of adhesive used.

[0091] It should be noted that the indentations 202 appear alternately on both sides of the glass fiber filter material 201; that is, in the adjacent two indentations 202 of the glass fiber filter material 201, one indentation 202 is pressed on one side of the glass fiber filter material 201, and the adjacent other indentation 202 is pressed on the opposite side of the glass fiber filter material 201.

[0092] As preferred, as shown in the drawings, Figure 2 As shown, when the filter cake 303 with wrinkles is formed, the adhesive is discontinuously distributed on the convex surface or the concave surface of the indentation 202 of the glass fiber filter material 201, and the adhesive extends to both sides of the indentation 202 as the center line, and the extended adhesive does not touch the adjacent indentation 202; preferably, the adhesive is centered on the crease line, and each side extends to half of the crease distance; meanwhile, the adjacent two crests are fixed by the adhesive distributed on the convex surface or the concave surface of the indentation 202, and the adjacent two crests are spaced by the adhesive distributed on the convex surface or the concave surface of the indentation 202. This arrangement allows the inner side of the crests to form a flow channel when the filter material forms a pleated structure, avoiding the loss of filtration area caused by the adhesive, while greatly reducing the amount of adhesive used.

[0093] Among them, the air filter element 103 is made by pressing the glass fiber filter material 201 on both sides to form indentations 202 and discontinuously applying adhesive to form a filter cake 303 with wrinkles, and then bending the filter cake 303 and synchronously bonding a breathable film layer 302 on both sides of the filter cake 303.

[0094] Among them, the glass fiber filter material 201 includes high-efficiency glass fiber material. The film layer 302 uses coarse-efficiency fiber material with high strength and high air permeability, which can effectively fix the filter pleats and prevent the filter element from appearing pleats during use; at the same time, the film layer 302 can solve the problem that the high-efficiency glass fiber material is easy to curl and break during the production of the filter element and falls into the downstream to cause air pollution; the film layer 302 can also be used for air roughing, and can enhance the environmental adaptability of the air filter element under complex working conditions such as high oil mist and high dust.

[0095] As preferred, the air filter cartridge further comprises end covers installed at both ends of the cylindrical air filter element 103, and at least one end cover has an opening communicating with the inner space of the air filter element 103. In this embodiment, the two end covers are a through end cover 101 with an opening and a stop end cover 105 without an opening.

[0096] When using the air filter cartridge, as shown in the drawings, Figure 1As indicated by the arrows, the air flows into the filter element from the outside to the inside, is filtered by the air filter element 103, and the filtered clean air flows out from the inside of the air filter element 103 to the downstream to meet the gas turbine air intake requirement.

[0097] It is to be understood that the terms such as "include" and "may include", etc. used in the present application represent the presence of the disclosed functions, operations, or constituent elements, and do not limit one or more additional functions, operations, and constituent elements. In the present application, terms such as "include" and / or "have" can be interpreted as indicating a specific characteristic, number, operation, constituent element, component, or a combination thereof, but cannot be interpreted as excluding the presence or addition of one or more other characteristics, numbers, operations, constituent elements, components, or combinations thereof.

[0098] It should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0099] In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0100] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing", and the like should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium, or can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0101] Those skilled in the art will readily understand that the above description is only the preferred embodiment of the present application, and is not intended to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for manufacturing an air filter element, characterized in that, Includes the following steps: S1. Press indentations (202) on both sides of the glass fiber filter material (201); S2. Intermittently apply adhesive to both sides of the glass fiber filter material (201) so that linear adhesive is intermittently distributed at the indentation (202) of the glass fiber filter material (201). S3. Pleating the filter material with the indentation (202) and the adhesive, so that the pleats are fixed together by the adhesive, thereby forming a filter cake (303); S4. Move and wind the filter cake (303), and simultaneously bond the breathable membrane layer (302) on both sides of the filter cake (303), and then connect the two ends of the filter cake (303) to form a cylindrical air filter element (103). In step S4, before winding, the coating layer (302) is elastically stretched from one side of the filter cake (303) to the opposite side of the filter cake (303), with the middle section of the coating layer (302) abutting against the front end of the filter cake (303).

2. The manufacturing method as described in claim 1, characterized in that, In step S2, during the intermittent application of adhesive, the adhesive is intermittently distributed on the convex or concave surface of the indentation (202) along the glass fiber filter material (201). The adhesive extends to both sides with the indentation (202) as the center line, and the extended adhesive does not touch the adjacent indentation (202).

3. An air filter manufacturing apparatus, characterized in that, include: Indentation device for pressing indentations (202) on both sides of glass fiber filter material (201); A glue-applying device is used to inject intermittent adhesive into the indentations (202) of the glass fiber filter material (201); A pleating device is used to pleat a glass fiber filter material (201) with indentations (202), so that the pleated glass fiber filter material (201) is fixed by the adhesive at the indentations (202) to form a filter cake (303); A roll-to-roll film covering device is used to roll up the filter cake (303) and simultaneously cover both sides of the filter cake (303) during the winding process. The roll coating device includes a shaping fixture (304) and a film feeding mechanism; the shaping fixture (304) has a cylindrical inner cavity and an inlet and an outlet communicating with the cylindrical inner cavity; the film feeding mechanism is used to guide the coating layer (302) through the inlet and to make the coating layer (302) elastically stretched from one side of the filter cake (303) to the opposite side of the filter cake (303), and the middle section of the coating layer (302) is abutted by the front end of the filter cake (303).

4. The manufacturing equipment as described in claim 3, characterized in that, The roll coating apparatus further includes: The dispensing mechanism is located at the feed inlet and is used to dispense adhesive onto both sides of the filter cake (303) or the coating layer (302) on both sides of the filter cake (303). The traction mechanism is used to pull the coating layer (302) and filter cake (303) at the feed inlet into the cylindrical inner cavity, so that the coating layer (302) and filter cake (303) are rolled and shaped along the inner wall of the cylindrical inner cavity.

5. The manufacturing equipment as described in claim 4, characterized in that, The traction mechanism includes: The main shaft (305) is rotatably connected to the shaping fixture (304); A traction rod (307) is used to pull the membrane layer (302) and the filter cake (303); The telescopic component (306) connects the main shaft (305) and the traction rod (307) and is used to adjust the distance between the main shaft (305) and the traction rod (307) so that the main shaft (305) can drive the traction rod (307) to move along the circumferential inner wall of the cylindrical inner cavity in the shaping fixture (304) when the main shaft (305) rotates.

6. An air filter cartridge, characterized in that, The air filter (103) includes a cylindrical air filter element (103) made by any of the manufacturing methods described in claims 1-2 or any of the manufacturing equipment described in claims 3-5, wherein the air filter element (103) is provided with protective nets on both the inner and outer sides; The air filter element (103) includes a filter cake (303) and a membrane layer (302) adhered to the inner and outer sides of the filter cake (303). The filter cake (303) is formed by intermittently adhesive bonding of glass fiber filter material (201) after indentation and pleating. When forming a pleated filter cake (303), the adhesive is intermittently distributed on the convex or concave surface of the indentation (202) along the glass fiber filter material (201). The adhesive extends to both sides with the indentation (202) as the center line, and the extended adhesive does not touch the adjacent indentation (202). Adhesive fixation is formed between two adjacent pleats by the adhesive distributed on the convex or concave surface of the indentation. At the same time, a gap is formed between two adjacent pleats by the adhesive distributed on the convex or concave surface of the indentation.

7. The air filter cartridge as described in claim 6, characterized in that, When forming a pleated filter cake (303), the adhesive is distributed in a matrix on the same side surface of the glass fiber filter material (201).

8. The air filter cartridge as described in claim 6, characterized in that, When forming the wrinkled filter cake (303), the adhesive at the two adjacent indentations (202) is distributed intermittently in an alternating pattern.

9. The air filter cartridge according to any one of claims 6-8, characterized in that, The air filter cartridge also includes end caps installed at both ends of the cylindrical air filter element (103), at least one of the end caps having an opening communicating with the inner space of the air filter element (103).

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