JP2019130438A - Cartridge type filter element of industrial dust collector - Google Patents

Abstract

To prevent a reinforcement tape from moving in the whole length direction of a filter material without using an adhesive, in a cartridge type filter element of an industrial dust collector provided with the reinforcement tape for preventing a swelling of the filter material in backflow washing time.SOLUTION: In an element of sealing both ends of a cylindrical filter material 1 composed of continuity of a pleat, that is, in the element of winding a reinforcement tape 20 for preventing a swelling of the filter material in backflow washing time on the filter material peripheral side, a high wall 2 in a height is interwoven-arranged in a plurality of pleats, and the high wall in the height is provided with a locking cutout 3 for regulating the movement of the reinforcement tape in the whole length direction of the filter material, and the reinforcement tape is locked on the cutout when winding on the filter material, and the locking cutout 3 is thereby formed as fixation means of the reinforcement tape to the filter material.SELECTED DRAWING: Figure 1

Description

The present invention relates to a filter medium for a solid-gas separation filter element used for an industrial dust collector, and more particularly to a filter element provided with a reinforcing tape for preventing the filter medium from swelling during backwashing.

  In a dust collector or the like, a filter element is used to collect powder (solid content) such as dust from inhaled air and to filter and separate it.

  FIG. 5 shows a filter element of this type. A cylindrical filter medium 1 composed of continuous ridges and an inner cylinder 12 having a large number of through holes inserted into the filter medium are connected to both ends of a synthetic resin or metal. It seals with the end plates 10 and 11 which consist of hard materials, such as (patent document 1).

  An end plate made of a nonwoven fabric or a woven fabric may be used as means for sealing both ends of the filter medium (Patent Document 2).

  In this type of cartridge filter element, it is necessary to periodically remove the collected powder by backwashing. The above-described backwashing is a system in which the backwashing is performed by counter blow using backflow pressure air (0.3 to 0.6 Mpa).

  In this case, compared with the pressure air (0.1 to 0.3 Mpa) at the time of normal movement (see FIG. 7), the pressure air (0.3 to 0.6 Mpa) at the time of backflow cleaning is a high pressure. A phenomenon occurs in which the filter medium 1 swells greatly at the center of both ends and the diameter increases (see FIG. 8).

  Therefore, in order to prevent the above phenomenon, the reinforcing tape 20 is wound around the periphery of the filter medium 1 (see FIG. 9).

  In the above-mentioned prior art, when the reinforcing tape is attached to the filter medium, the bonding position of the filter medium to the reinforcing tape is the top of each of the pleats constituting the filter medium. Only obtained. On the other hand, regarding the adhesive, there is also a problem that there is no appropriate one when considering heat resistance and adhesiveness to the PTFE material.

  As described above, in the prior art, there may occur a situation in which sufficient adhesive force cannot be obtained. In such a case, the influence is not limited to the position of the reinforcing tape, but the scale of the filter medium is not removed by the peeling of the adhesive. The top of the pleats was rubbed, which could cause a serious problem of breaking the filter media.

  As inventions for achieving the above-mentioned problems, the inventions described in Patent Document 3 are known. According to the present invention, “a substantially cylindrical filter filter body having a star-shaped cross-sectional shape in a plane projection direction and formed in a pleat shape, plates disposed above and below the filter filter body, and accommodated in the filter filter body” A filter body fixing member, a plurality of fixtures arranged at appropriate intervals in the circumferential direction of the filter filter body and welded and fixed to the outer peripheral side ridges of the filter filter body, and the filter filter body And a belt-like band having both ends welded and fastened in a state of being mounted on the outer periphery and supported by the fixture. By fixing the fixture having the engaging portion of the reinforcing tape to the wall of the filter medium, there is an effect of restricting the movement of the filter medium of the reinforcing tape in the full length direction.

JP 2014-008443 A Design Registration No. 1573556 Japanese Patent No. 5435974

  The known invention described in Patent Document 3 regulates the movement of the reinforcing tape in the full length direction by locking the reinforcing tape to the fixture instead of bonding, but in addition to the filter medium, a separate member is used. A process of preparing a plurality of fixtures and a process of fixing them to the filter medium are required, and in addition, there is a problem that manufacturing costs increase because accurate positioning is required. In addition, since another member is fixed to the filter medium, it is necessary to consider that the fixation does not come off during many years of use.

  The cartridge type filter element of the industrial dust collector of the present invention was created in view of the above-mentioned problems of the prior art, and it is an element in which both ends of a cylindrical filter medium made of continuous ridges are sealed and backflowed. In an element in which a reinforcing tape for preventing swelling of the filter medium at the time of washing is wound around the filter medium peripheral side, a plurality of high ridges are arranged in a combination of high ridges. A locking notch for restricting the movement of the filter medium in the full length direction is provided, and the reinforcing tape is fixed to the filter medium by locking the reinforcing tape to the notch when the reinforcing tape is wound around the filter medium. To do.

  The invention according to claim 2 is characterized in that, in the cartridge type filter element of the industrial dust collector, both ends of the filter medium are sealed with an end plate made of a hard material.

  The invention according to claim 3 is characterized in that, in the cartridge type filter element of the industrial dust collector, both ends of the filter medium are sealed with an end plate made of a nonwoven fabric or a woven fabric.

  According to a fourth aspect of the present invention, in the cartridge type filter element of the industrial dust collector, the filter medium has a pleated shape composed of a series of inverted V-shaped ridges composed of two ridge surfaces having folded top portions, It is characterized in that the ridge surfaces around the locking notches of the ridges are fixed to each other.

  The invention according to claim 5 is characterized in that, in the cartridge type filter element of the industrial dust collector, the fixing means is formed by ultrasonic welding of the flange surfaces.

  The present invention having the above-described configuration is arranged by mixing a plurality of high ridges in a plurality of ridges and restricting movement of the filter medium of the reinforcing tape in the full length direction to the high ridges. By providing a notch and fixing the reinforcing tape to the filter medium by locking the reinforcing tape around the filter medium when the reinforcing tape is wound around the filter medium, only the line bonding between the back surface of the reinforcing tape and the top of the pleats is possible. Compared to the prior art, which can only provide a weak adhesive force, a stronger fixation is realized, and even when a PTFE material is used, the reinforcing tape does not move.

  On the other hand, since it is not necessary to prepare a fixing tool as a separate member in addition to the filter medium as in the prior art, the cost required for manufacturing the fixing tool and the cost required for fixing can be reduced, and strong fixing can be realized at low cost.

  In addition, the notch that is used as a means to fix the reinforcing tape to the filter medium can be processed at the same time when the filter medium is manufactured, so that the manufacturing cost can be reduced, and the positioning work for each case, such as when fixing a fixture of another member, is performed. Is also unnecessary.

  In addition, it is not necessary to take care to prevent the sticking from being removed during many years of use like a fixing tool because it is used as a means of fixing the reinforcing tape to the filtering medium by processing the filter medium itself without fixing the fixing tool of another member. A fixing means with good maintainability is realized.

  In this case, according to the invention described in claim 4, the filter medium has a pleated shape composed of a series of inverted V-shaped ridges composed of two ridge surfaces having folded tops, and the engagement notch of the ridge having a high height. Since the peripheral flange surfaces are fixed to each other, a strong fixing means is realized without imposing a burden on the filter medium.

  Further, according to the invention described in claim 5, since the fixing surface is formed by ultrasonic welding the flange surfaces around the locking notch, the adhesive is peeled off and the scale rubs the top of the pleat of the filter medium. There is no serious problem of damaging the filter media.

The perspective view of the principal part which shows the assembly process of the cartridge type filter element of this invention. The perspective view of the principal part which shows an assembly process same as the above. The perspective view of the principal part of a completion state same as the above. Sectional drawing which shows an assembly process same as the above. The perspective view of the cartridge type filter element of the industrial dust collector of a prior art. The perspective view of the state which gave the reinforcement tape same as the above. The partially cutaway side view which shows the effect | action of the cartridge type filter element of the industrial dust collector of a prior art. The side view which shows the effect | action of the cartridge type filter element of the industrial dust collector of a prior art. The side view which shows an effect | action of the state which gave the reinforcement tape same as the above.

  The present invention is implemented on the basis of a known cartridge type filter element shown in FIG. 5, and reference numeral 1 in the figure indicates a filter medium. This filter medium 1 is mainly composed of synthetic fibers, and is an inverted V-shaped ridge composed of two ridges having folded tops of woven fabric, nonwoven fabric, felt, etc. having a thickness of about 0.1 to 0.3 mm. It is processed into a pleated cylindrical shape consisting of a series of In this embodiment, as an example of pleats, a mountain having a triangular cross-section is continuous. Reference numeral 12 in the figure denotes a cylindrical inner cylinder that is inserted into the filter medium 1 and retains its cylindrical shape, and is made of a porous metal such as punching metal or a synthetic resin. The filter medium 1 and the inner cylinder 12 are supported between the end plates 10 and 11 made of synthetic resin or metal.

  Of course, an end plate made of a nonwoven fabric or a woven fabric may be used as means for sealing both ends of the filter medium.

  In the filter medium 1, the high ridges 2 are mixed and arranged in a plurality of ridges, and the locking notches for restricting the movement of the filter medium in the full length direction of the reinforcing tape to the high ridges are arranged. 3 is provided.

  Further, here, the rigidity is enhanced by fixing the flange surfaces 4 around the locking notch 3 of the high flange 2 by ultrasonic welding.

  1 to 4 are diagrams showing an assembly process of the cartridge type filter element of the present invention. Here, as shown in FIG. 4, four high ridges 2 are arranged at intervals of 90 degrees in the circumferential direction of the filter medium 1, and these are arranged at two locations in the full length direction of the filter medium. Of course, the interval is not limited thereto.

  Reference numeral 20 in the figure denotes a reinforcing tape. The reinforcing tape 20 is made of, for example, a woven fabric. Here, a tape having a length exceeding the outer periphery of the filter medium 1 is wound around the filter medium, and the end 21 is overlapped and bonded. 2 is inserted into the locking notch 3 and locked to the hanger (see FIGS. 2 to 4).

DESCRIPTION OF SYMBOLS 1 Filter medium 2 High height 襞 3 Stopping notch 4 Adhesion surface 20 Reinforcement tape

Claims (5)

An element in which both ends of a cylindrical filter medium consisting of continuous ridges are sealed, and an element in which reinforcing tape to prevent the bulge of the filter medium during backwashing is wound around the periphery of the filter medium is When the reinforcing tape is wrapped around the filter medium, the notch is provided with a high notch and a locking notch for restricting the movement of the filter medium of the reinforcing tape in the full length direction. A cartridge type filter element for an industrial dust collector, characterized in that it is used as a means for fixing a reinforcing tape to a filter medium by engaging with the filter. The cartridge type filter element for an industrial dust collector according to claim 1, wherein both ends of the filter medium are sealed with an end plate made of a hard material. The cartridge type filter element of an industrial dust collector according to claim 1, wherein both ends of the filter medium are sealed with an end plate made of a nonwoven fabric or a woven fabric. The filter medium has a pleated shape composed of a series of inverted V-shaped ridges composed of two ridge surfaces having folded top portions, and the ridge surfaces around the locking notches of the ridge having a high height are fixed to each other. A cartridge type filter element for an industrial dust collector according to any one of the above. The cartridge type filter element of the industrial dust collector according to any one of claims 1 to 4, wherein the fixing surfaces are formed by ultrasonic welding of the flange surfaces.

Images