JP4395196B1 - Bug filter - Google Patents

Abstract

[PROBLEMS] To provide a simple structure, a small number of parts, excellent mass productivity, easy mounting inside a molded filter, excellent assembly workability, and reliable deformation of the molded filter inward and outward. It is possible to provide a shape holder that can be easily prevented and has excellent fixing stability and shape retention reliability.
(A) a fixture having a clamping part that clamps a fold part inside the molded filter, and a holding part that is connected to the clamping part and projects from the fold part toward the axial center of the molded filter; b) An annular member held by a plurality of fixtures arranged on the same circumference on a plurality of folds of the molded filter, or a connecting member that connects adjacent fixtures of the plurality of fixtures, I have.
[Selection] Figure 3

Description

The present invention relates to a bag filter provided with a shape holder for holding the shape of a molded filter used in a dust collector equipped with a pulse jet type wiping mechanism.

Conventionally, as a bag filter of a dust collector, a cylindrical filter cloth that separates and collects dust by passing a dust-containing airflow, and a support frame (retainer) that supports the filter cloth from the inside in order to maintain the shape of the filter cloth, The one with is used. When the dust collector is operated, the bag filter collects dust and the loss of suction force increases with the lapse of operating time, so it is necessary to remove the collected dust intermittently or continuously. A pulse jet type dust collector is provided with a dropping mechanism.
On the other hand, new materials such as filter cloths and molded filters have been developed for the purpose of downsizing dust collectors and improving filtration performance.
This molded filter (filter body) is formed in a chrysanthemum shape (or star shape) having a plurality of folds in the horizontal cross section, and the filter body is less likely to be deformed than a filter formed of a cylindrical filter cloth. However, in order to prevent inward deformation at the time of suction filtration, it is common to provide an insertion body in which a cage (retainer) or a punching metal is formed in a cylindrical shape.
In addition, in order to prevent the filter main body from being returned to the original state while being swollen outward by pulse jetting, some of the filter main bodies are provided with band-shaped deformation prevention tools at predetermined intervals.
However, if clogging of the filter body does not recover even if the filter body is removed, or if the filter body is damaged, parts such as cages and venturis that are ready for use are discarded together with the filter body, saving resources. There was a problem of lack of environmental protection.
As a solution to this problem, for example, (Patent Document 1) states that “the entire filter is a consumable filter paper body formed into a predetermined shape, and top and bottom surfaces attached to the upper and lower ends of the filter paper body. Each filter plate, a reinforcing cage inserted into the filter paper body, and various parts of non-consumable parts consisting of a venturi for compressed air blowing attached inside the upper end of the filter paper body, There is disclosed a "pulse jet dust collector filter" characterized in that various parts of these non-consumable parts are assembled to the above-mentioned consumable filter paper body.

JP-A-8-38839

(1) In (Patent Document 1), the filter paper body (filter body) of consumables and the various parts of non-consumable parts are separately formed, so that only the filter paper body is discarded and the various parts are reused. However, because the cage is formed of multiple vertical and ring cages, the cage has a large number of parts, lacks mass productivity, easily increases the mass of the cage, lacks handleability, and lengthens the filter. Had the problem of being difficult. Further, in order to detachably fix the cage integrated with the vertical hook and the ring hook to the filter paper body, filter plates are necessary on the upper surface and the bottom surface, respectively, and there is a problem that the mass productivity is lacking. Furthermore, by arranging the cage inside the filter paper body, it is possible to regulate the inward deformation of the filter paper body, but because the filter paper body and the vertical saddle and ring cage of the cage are not directly fixed, When pulsing off (backwashing), deformation of the filter paper body cannot be controlled, the filter paper body may be damaged, or the filter paper body may swell outward and not return to its original state. Further, there was a problem that the durability of the filter paper body and the stability of the filtration performance were lacking.
(2) In the case where an insertion body in which a punching metal is formed in a cylindrical shape is provided instead of a cage, inward deformation of the filter paper body can be reliably prevented over the entire length, but suction There was a problem that the resistance at the time of filtration was large, the efficiency of filtration was lacking, the mass was easily increased, and the handling and resource saving were lacking. In addition, like the cage, the inward deformation of the filter paper body can be controlled, but the outward deformation of the filter paper body cannot be controlled, and there is a problem that the shape of the filter paper body is lacking. It was.
(3) In the case where a band-shaped deformation preventing device is provided on the outer periphery of the filter body at a predetermined interval, the deformation preventing device has sufficient rigidity, and the filter body and the deformation preventing device are directly fixed. The filter body can be prevented from being deformed inward and outward, but the outer periphery of the filter body is covered with the deformation prevention device, so that not only the filtration area is easily reduced, but also the outer periphery of the filter body It is difficult to remove dust adhering to the gap between the deformation prevention device and the surface of the deformation prevention device, and it is easy for the dust to accumulate around the deformation prevention device, resulting in poor filtration performance. Have the problem of lacking in performance and long life.

The present invention solves the above-described conventional problems, and has a simple structure, a small number of parts, excellent mass productivity, can be easily attached to the inside of the molded filter, has excellent assembly workability, and it is possible to reliably prevent deformation of the inward and outward, the stability of the fixing, by providing a shape retainer having excellent reliability of shape retention, it is possible to securely hold the shape of the molded filter, A bag filter that can reliably prevent deformation of the molded filter during suction filtration and backwashing, prevent damage to the molded filter, and has excellent filtration efficiency, stability of filtration performance, and long life of the molded filter. The purpose is to provide.

In order to solve the above conventional problems, the bag filter of the present invention has the following configuration.
The bag filter according to claim 1 of the present invention includes a molded filter having a plurality of folds and having a horizontal cross section formed in a chrysanthemum shape, and a shape holder provided in the molded filter. The shape holder includes: (a) a pair of sandwiching pieces arranged opposite to each other and an uneven portion formed on a sandwiching surface of each of the sandwiching pieces; A sandwiching portion that sandwiches, a holding portion that is provided continuously from the sandwiching piece of each of the sandwiching portions and protrudes from the fold portion toward the axial center of the molded filter, and an engagement portion that is formed on the holding portion, A plurality of fixtures arranged on the same circumference in the plurality of folds of the molded filter, and having connecting portions that connect the pair of sandwiching pieces at the ends on the holding unit side And (b) a knob formed in a single coil shape and extending from both ends thereof. See section or provided with a knob portion that protrudes in the vicinity of its ends, has a configuration including an annular member which is retained by being engaged with the engagement portion of the plurality of the fastener holding portion Yes.
With this configuration, the following effects can be obtained.
(1) Since the fixture has a clamping portion for clamping the fold portion inside the molded filter, the fixture can be simply fixed simply by clamping the fold portion of the molded filter with the clamping portion, and the assembly workability Excellent.
(2) Since the fixture has a holding portion that is connected to the clamping portion and protrudes from the fold portion toward the axial center of the molded filter, a plurality of fixtures are arranged on the same circumference in a plurality of fold portions of the molded filter. By doing so, the annular member can be held along the inner periphery of the molded filter , and the assembly workability and the shape filter retainability are excellent.
(3) Since the plurality of fixtures are connected by the annular member by holding the annular member with the plurality of fixtures arranged on the same circumference, a vertical wire like a conventional retainer is unnecessary. , It can reduce the number of parts and reduce the weight, and is excellent in mass productivity and resource saving.
(4) Even if the molded filter is deformed inward by suction filtration, the molded filter can be prevented from being deformed at the place where the annular member is disposed on the inner peripheral side of the molded filter. The amount of deformation can be reduced to reduce the occurrence of breakage, and the molded filter has excellent durability and long life.
(5) by a plurality of fasteners secured to the fold portion of the molded filter is connected via the annular member, also molded filter during backwashing by pulse jet attempting to deform outwardly disposed annular member in been places, it is possible to prevent deformation of the molded filter by a plurality of fasteners, to suppress the deformation of the whole shaped filter can reduce the occurrence of breakage, durability, excellent in long life, the annular member The molded filter swelled outward in between can be pulled back inward to prevent the molded filter from remaining swelled, and the shape retention is excellent.
(6) The holding part of the fixture has a pair of holding pieces opposed to each other, and one end side of the pair of holding pieces is connected by a connecting part having elasticity, so that the holding parts arranged to face each other by the elasticity of the connecting part The gap between the pieces can be easily adjusted, and the molded filter can be attached to and detached from the fold portion, and the attachment / detachment workability is excellent.
(7) Since the clamping part of the fixture has an irregular part formed on the clamping surface of each clamping piece, the fold part of the molded filter can be firmly clamped by the engagement of the irregular part. It can reliably prevent vertical movement and back-and-forth movement and disconnection, and is excellent in fixing reliability and stability.
(8) In the case where an engaging portion with which the annular member is engaged is formed in the holding portion of the fixture, the annular member can be securely held and a plurality of fixtures can be firmly connected, and the number of parts can be reduced. Thus, the inward and outward deformation of the molded filter can be efficiently prevented, and the shape retention stability and reliability are excellent.
(9) An annular member formed in a coiled shape can be elastically expanded and contracted together with a fixture by elasticity, and is elastic without completely constraining deformation of the molded filter inward and outward. By allowing small deformation, it is possible to prevent stress from concentrating between the clamping part and the fold part of the fixture, and to prevent the fixture from falling off or damage to the molded filter. Excellent.
(10) Since the annular member formed in a coil shape has elasticity, by engaging the annular member with the engaging portion in the radially contracted or enlarged state, the annular member becomes the engaging portion. It is held firmly, can prevent the annular member from falling off, and has excellent fixation stability.
(11) In the case of having a knob extending from both ends of the annular member formed in a coil shape or a knob protruding in the vicinity of both ends, the knob is picked by hand and is circumferentially The diameter of the annular member can be easily expanded and contracted in the radial direction simply by moving it to the engagement part, and can be easily attached to and detached from the engaging part formed on the holding part of the fixture. Excellent in properties.
(12) Since the molded filter and the fixing tool or the fixing tool and the annular member are not fixed by fixing means such as adhesion or welding, they can be easily replaced in the event of a failure, and are recovered when the molded filter is discarded. It can be used repeatedly and is excellent in resource saving and environmental protection.
(13) By installing a shape holder in the molded filter, it is possible to suppress deformation of the molded filter (filter body) at the time of suction filtration and to reduce the occurrence of damage to the molded filter. In addition, the molded filter swelled outward during backwashing can be pulled back inward to prevent the molded filter from remaining swelled, and the shape retainability is excellent.
(14) Since the shape holder is composed only of a fixture and an annular member and does not use a vertical wire material like a conventional retainer, the number of parts can be reduced and the weight can be reduced, and the molded filter can be made longer. The filtration performance can be improved.
(15) By installing the shape holder in the molded filter, it is possible to reliably hold the shape of the molded filter without reducing the filtration area of the molded filter, and to reliably remove dust. A decrease in filtration performance can be prevented, and the filtration efficiency and stability are excellent.

Here, the material of the fixture and the annular member can be selected from metal or synthetic resin depending on the environment (temperature) to be used. A synthetic resin having excellent mechanical strength is preferably used. As the annular member, a member formed by joining a wire by welding or the like in accordance with the cross-sectional shape of the molded filter is preferably used. However, it is easy to elastically deform in the radial direction. You may make a cut.
The fixing tool only needs to be able to hold the fold portion inside the molded filter by the holding portion. As the fixing tool, one that holds the annular member by locking or fitting with the holding portion is preferably used. For example, an engaging portion that is cut out in an arc shape may be formed at the upper end, lower end, or side of the holding portion of the vertical plate material, and the annular member may be engaged, or a plate material having spring properties The annular member may be fitted to a fitting portion formed by being bent into a substantially semi-cylindrical shape.
In addition, the fixing tool can be easily attached in a state where the filter body has a crease that is a crease and is expanded on a flat surface. After attaching all the fixing tools, the ends are joined together to form a chrysanthemum shape. do it.

The number of fixtures arranged in the same plane can be selected as appropriate, but 3 to 8 are preferably used. As the number of fixtures becomes less than 3, it tends to be difficult to hold the annular member stably. As the number of fixtures becomes more than 8, the number of parts increases and the assembly work becomes complicated, resulting in productivity. Tends to decrease, both of which are not preferred.
Further, the arrangement of the fixtures can be selected as appropriate, but is preferably arranged at equiangular intervals. This is because the position of the fold portion sandwiched between the fixing tools is biased and the molded filter is prevented from being deformed into an irregular shape.

Instead of the annular member, a connecting member that connects adjacent fixtures of the plurality of fixtures may be provided. Thereby, adjacent fixtures can be connected with a connection member, and it is excellent in assembly workability | operativity and the shape retention property of a shaping | molding filter. A connecting member connects adjacent fixtures of a plurality of fixtures arranged on the same circumference, so that the plurality of fixtures are connected by the connection member, so that a vertical wire like a conventional retainer is used. It is unnecessary and can reduce weight by reducing the number of parts, and is excellent in mass productivity and resource saving. Even if the molded filter is deformed inward by suction filtration, the molded filter can be prevented from being deformed at the location where the connecting member is disposed on the inner peripheral side of the molded filter. It can be kept small to reduce the occurrence of breakage, and the molded filter has excellent durability and long life. The location where the coupling member is arranged even if the molding filter is deformed outward during backwashing by pulse jet by connecting a plurality of fixtures fixed to the fold part of the molding filter via the coupling member. In this case, deformation of the molded filter can be prevented by a plurality of fixtures. Therefore, the deformation of the molded filter as a whole can be suppressed and the occurrence of breakage can be reduced, and the durability and long life can be reduced. The molded filter swelled inward can be pulled back inward to prevent the molded filter from remaining swelled, and the shape retainability is excellent.
The material of the connecting member can be selected from metal or synthetic resin depending on the environment (temperature) used, etc., but it has excellent stainless steel, heat resistance and mechanical strength. A synthetic resin or the like is preferably used. As the connecting member, a member that expands and contracts in the length direction by elasticity, such as a coil spring (string wound spring), is preferably used.
When the holding portion of the fixture is formed with a fixing portion to which the end of the connecting member is fixed, and the connecting member has a configuration formed in a coil spring shape, the adjacent fixing tools are connected by the connecting member. It can be simply connected, and with a small number of parts, it is possible to efficiently prevent the inward and outward deformation of the molded filter, and it has excellent stability and certainty of shape retention. The coupling member formed in the shape of a coil spring can be elastically expanded and contracted together with the fixture by elasticity, and allows elastic minute deformation without completely constraining the deformation of the molded filter inward and outward. As a result, it is possible to prevent stress from concentrating between the clamping part and the fold part of the fixing tool, to prevent the fixing tool from dropping off, or to damage the molded filter, and to have excellent durability and long life. Since the connecting member formed in the shape of a coil spring has elasticity, the connecting member is adjacent to the fixing portion formed in the holding portion of the adjacent fixing device in a state where the connecting member is stretched or compressed. It is firmly held between the fixtures, and the connecting member can be reliably prevented from falling off, and the fixation is excellent in stability. Since the fixture and the connecting member are not fixed by fixing means such as adhesion or welding, they can be easily replaced in the event of a problem, and can be recovered and used repeatedly when the molded filter is discarded. Excellent resource and environmental protection.

Here, as the concavo-convex portions formed on the clamping surface of the clamping piece, those meshing with each other are preferably used. For example, a convex portion may be formed on one clamping surface and a concave portion may be formed at a position corresponding to the convex portion on the other clamping surface, or the pitch of either the convex portion or the concave portion may be shifted on both clamping surfaces. May be formed. As the shape of the convex portion and the concave portion, a hemispherical shape, a triangular pyramid shape, a quadrangular pyramid shape and the like are preferably used. Moreover, when a convex part is formed in the shape of a claw like a wholesaler's blade, a convex part can bite into the surface of a fold part, can prevent position shift, and is excellent in stability of fixation. The number and arrangement of the convex portions and the concave portions constituting the concave and convex portions can be appropriately selected according to the area and shape of the clamping surface. In addition, although the uneven | corrugated | grooved part should just have an unevenness | corrugation formed in the surface of the clamping surface at least, you may drill the fitting hole which penetrates a clamping piece instead of a recessed part. Moreover, you may form an uneven | corrugated | grooved part of mesh shape (grid shape) or a knurled shape with a protruding item | line or a concave item | ridge instead of a convex part or a recessed part.
The shape of the engaging portion formed in the holding portion of the fixture is preferably formed in an arc shape larger than the diameter of the annular member. Moreover, the shape of the fixing | fixed part formed in the holding | maintenance part of a fixing tool should just be what can fix the edge part of a connection member. For example, a hook-shaped locking part may be formed at the end of the connecting member, and a hook-shaped notch or locking hole may be formed as a fixing part in the holding part of the fixture. An annular locking portion may be formed at the end, and a hook-shaped notch may be formed as a fixing portion on the holding portion of the fixture. In addition, you may form an engaging part and a fixing | fixed part in a connection part instead of a holding | maintenance part.
The knob of the annular member may be formed by bending both ends of the annular member formed in a single coil shape, or may be formed by welding a wire near the both ends. The two knobs can be provided in any direction, but when provided in the same direction, they can be easily operated by being held with one hand, and are excellent in operability. In particular, when it is provided in a vertical direction or a horizontal direction, it is preferable because it is easy to grip and operate.

Invention of Claim 2 is a bag filter of Claim 1, Comprising: The said fixing tool of the said shape holder is the bag filter.
A notch portion formed on the upper surface side of the holding portion and through which the annular member of the shape holder is inserted, and a lock formed to protrude to the notch portion side above the engaging portion And a claw.
With this configuration, in addition to the operation obtained in the first aspect, the following operation can be obtained.
(1) The annular member is inserted through a notch portion formed on the upper surface side of the holding portion of the fixture, and is engaged and held by the engaging portion. At this time, since the locking claw is formed so as to protrude from the connecting portion side to the concavo-convex portion side, the locking claw is locked to the upper end portion of the annular member. The annular member is engaged and held by the engaging portion due to its elasticity, but the annular member can be more securely held by the locking claw, and even if the molded filter is tilted or falls, the annular member Is excellent in stability and certainty of fixation.

Invention of Claim 3 of this invention is a bag filter of Claim 1 or 2, Comprising: The said several fixing tool of the said shape holder, and the said annular member are the longitudinal direction of the said shaping | molding filter. It has a configuration in which one or more stages are arranged.
With this configuration, in addition to the operation obtained in the first or second aspect, the following operation can be obtained.
(1) A plurality of fixtures and annular members of the shape holder are arranged in one or more stages in the longitudinal direction of the molded filter, so that the shape can be securely held corresponding to molded filters of various lengths. It is excellent in design flexibility and versatility.

Here, the molding filter can be formed into a chrysanthemum shape by pleating. As a molded filter when heat resistance is required, for example, a polytetrafluoroethylene (PTFE) fiber or an inorganic fiber base fabric having heat resistance such as glass fiber and excellent shape stability at high temperature can be used. What formed the filtration layer by implanting the organic fiber excellent in heat resistance and filterability like a polyphenylene sulfide (PPS) fiber with a needle punch etc. is used suitably. In general, where heat resistance is not required, filter cloth formed of a woven or non-woven fabric of synthetic fiber such as polyester, nylon, or acrylic is impregnated with a thermosetting resin such as phenol resin or melamine resin. Those molded into a predetermined shape such as a pleated shape by heating to a predetermined temperature and curing the resin are preferably used.
The number of arrangement and the arrangement interval of the shape holder fixture and the annular member or the connecting member in the longitudinal direction can be appropriately selected according to the cross-sectional area and length of the molded filter. The molded filter is not limited to a chrysanthemum cylindrical shape, but may be formed in a chrysanthemum elliptical cylindrical shape. In that case, the shape of the annular member may be formed in an elliptical shape according to the shape of the molded filter.

The holding part of the fixture of the shape holder may only hold the fold part of the molded filter, but may be bonded as necessary. By adhering the clamping part of the shape holder to the fold part of the molded filter, the fixture can be fixed securely and firmly, and the fixing reliability, stability, durability, and reliability of shape retention It is because it is excellent in property.
At this time, the adhesive can be appropriately selected according to the environment (temperature) in which the bag filter is used, the material of the molded filter and the fixture, and the like.
In addition, when an uneven | corrugated | grooved part is formed in the clamping surface of the clamping part of a fixing tool, an adhesive force can be improved by an anchor effect and it is excellent in the fixed reliability and durability.

As described above, according to the bag filter of the present invention, the following advantageous effects can be obtained.
According to the invention of claim 1,
(1) only to clamp the fold portion of the molded filter sandwiching portion in can be fixed easily fixtures, excellent assembling workability, by a plurality of fasteners are connected via the annular member, the suction Suppressing deformation of the molded filter inward and outward during filtration and backwashing, reducing the occurrence of damage to the molded filter, improving durability and long life, and swelled outward It is possible to provide a bag filter provided with a shape holder excellent in shape retainability that can prevent the molded filter from being swollen by pulling back inward.
(2) Since the annular member formed in the shape of a single coil has elasticity, it does not completely restrain the inward and outward deformations of the molded filter, and it is allowed to be elastically deformed and fixed. A bag filter equipped with a shape holder with excellent durability and long life that prevents stress from concentrating between the clamping part and the fold part of the tool and prevents the fixture from dropping off or damage to the molded filter. Can be provided.

According to invention of Claim 2, in addition to the effect of Claim 1,
(1) The annular member is engaged and held by the engaging portion due to its elasticity, but the annular member can be more reliably held by the locking claw, and even if the molded filter is tilted or falls down The annular member does not fall off, and the fixing stability and reliability are excellent.

According to invention of Claim 3, in addition to the effect of Claim 1 or 2,
(1) Since the shape holder is composed of only a fixture and an annular member , and a plurality of fixtures are connected by an annular member , it is not necessary to use a vertical wire like a conventional retainer, and the number of parts is reduced. The weight of the molded filter can be reduced, the length of the molded filter can be increased, and not only the filtration performance can be improved. A shape holder with excellent filtration efficiency and stability that can reliably hold the shape of the molded filter without reducing the amount of dust, and can reliably remove dust and prevent deterioration of the filtration performance. Can be provided.

(A) the embodiment perspective view of a fixture shaped retainer for use in bag filter in 1 (b) on the plane fasteners shaped holder used in the bag filter in the first embodiment of the present invention of the present invention A perspective view showing the unfolded state The perspective view which shows the annular member of the shape holder used for the bag filter in Embodiment 1 of this invention The principal part fracture | rupture perspective view which shows the bag filter provided with the shape holder in Embodiment 1 of this invention (A) Main part sectional side view of bag filter provided with shape holder in Embodiment 1 of this invention (b) Main part enlarged view of Fig.4 (a) (A) The principal part fracture perspective view which shows the bag filter provided with the shape holder in the reference example 1 (b) The principal part expansion perspective view of the shape holder used for the bag filter in the reference example 1

Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.
(Embodiment 1)
FIG. 1A is a perspective view showing a fixture for a shape holder used in the bag filter according to the first embodiment of the present invention, and FIG. 1B is a shape used for the bag filter according to the first embodiment of the present invention. It is a perspective view which shows the state which expand | deployed the fixing tool of the holder on the plane.
In FIG. 1 (a), 1 is a fixture for a shape holder used in the bag filter in Embodiment 1 formed of a metal such as stainless steel, synthetic resin, or the like, and 2 is a pair of clamping pieces 2a and 2b facing each other. The holding part 6a and 6b of the fixing tool 1 formed in this manner is the holding part of the fixing tool 1 connected from the holding pieces 2a and 2b of the holding part 2, and 7a is on the upper surface side of the holding parts 6a and 6b. A cut-out portion 7b is formed in a shape of a circular arc at the back of the cut-out portion 7a, and the annular member inserted through the cut-out portion 7a is engaged. The engaging portion 7c is a locking claw formed so as to protrude above the engaging portion 7b toward the cutout portion 7a, and 8 is formed in a substantially arc shape in cross section and has elasticity, and a pair of sandwiched It is a connection part of the clamping part 2 which connects the one end side of piece 2a, 2b.

In FIG. 1 (b), 3a and 3b are inner clamping surfaces of the clamping pieces 2a and 2b, 4a and 4b are concave and convex portions formed on the clamping surfaces 3a and 3b of the respective clamping pieces 2a and 2b, and 5a is a clamping surface. The hemispherical convex part 5b which comprises the uneven part 4a of 3a is a hemispherical recessed part which comprises the uneven part 4b of the clamping surface 3b corresponding to the convex part 5a.
In the present embodiment, the convex portion 5a is formed on one clamping surface 3a and the concave portion 5b is formed on the other clamping surface 3b to form the respective concave and convex portions 4a and 4b, but the clamping pieces 2a and 2b are clamped. The uneven portions 4a and 4b formed on the surfaces 3a and 3b are not limited to this. Either the convex portion 5a or the concave portion 5b may be formed on both of the sandwiching surfaces 3a and 3b at different pitches so as to mesh with each other. Further, instead of the recess 5b, a fitting hole penetrating the sandwiching piece 2b may be formed, or instead of the protrusion 5a and the recess 5b, a ridge or a groove may be formed in a mesh shape (lattice shape) or knurled. You may form an uneven | corrugated | grooved part. As the shape of the convex portion 5a and the concave portion 5b, a triangular pyramid shape or a quadrangular pyramid shape is suitably used in addition to the hemispherical shape. Moreover, when the convex part 5a is formed in the shape of a claw like a wholesaler's blade, it is possible to prevent positional deviation and to have excellent fixing stability. In addition, the number and arrangement | positioning of the convex part 5a and the recessed part 5b which comprise the uneven | corrugated | grooved parts 4a and 4b can be suitably selected according to the area and shape of the clamping surfaces 3a and 3b. As in the present embodiment, the convex portions 5a and the concave portions 5b may be arranged in a staggered manner in addition to the vertical and horizontal alignment.

FIG. 2 is a perspective view showing an annular member of the shape holder used in the bag filter according to Embodiment 1 of the present invention.
In FIG. 2, reference numeral 10 denotes an annular member of the shape holder used in the bag filter according to the first embodiment, which is formed in a substantially one-turn coil shape from a metal such as stainless steel or a synthetic resin, and 10 a and 10 b denote the annular member 10. It is a knob part extended in the vertical direction from both ends.
Since the annular member 10 is formed in a substantially one-turn coil shape, it can be expanded and contracted in the radial direction by elasticity. At this time, since the knobs 10a and 10b are provided at both ends, the radius increases when the knobs 10a and 10b are gripped by the hand and moved closer to each other, and the original radius is restored by the restoring force when the hand is released.
In the present embodiment, both ends of the annular member 10 formed in a single coil shape are bent to integrally form the knobs 10a and 10b. However, when the annular member 10 is made of a metal such as stainless steel. The same kind of metal wire rod may be welded in the vicinity of both ends. The two knobs 10a and 10b are provided in the same direction, such as the vertical direction and the horizontal direction, so that they can be easily operated by grasping with one hand and provided in any direction. You can also.
The material of the fixture 1 and the annular member 10 can be appropriately selected from metals and synthetic resins according to the environment (temperature) used, etc., but durable stainless steel or the like can be used. Preferably used.

The usage method of the shape holder comprised as mentioned above is demonstrated.
FIG. 3 is a fragmentary perspective view showing a bug filter including the shape holder according to Embodiment 1 of the present invention, and FIG. 4A is a view of the bag filter including the shape holder according to Embodiment 1 of the present invention. FIG. 4B is an enlarged view of the main part of FIG. 4A.
3 and 4 (a), 15 is a shape holder composed of a plurality of fixtures 1 and an annular member 10 used for the bag filter in the first embodiment of the present invention, and 20 has a plurality of folds 20a. In addition, a molded filter formed in a cylindrical shape or an elliptical cylindrical shape with a horizontal cross-section, 21 is a bottom cover (FIG. 4A) that closes the bottom of the molded filter 20, and 30 is the shape retention in the first embodiment. This is a bug filter provided with a tool 15.
In addition, although the material of the shaping | molding filter 20 can be selected suitably, when heat resistance is required, it has heat resistance like glass fiber, for example, and was excellent in the form stability at high temperature. A filter layer is formed by planting organic fibers with excellent heat resistance and filterability, such as polytetrafluoroethylene (PTFE) fiber and polyphenylene sulfide (PPS) fiber, with a needle punch or the like on an inorganic fiber base fabric. Are preferably used. Further, the circumferential length of the annular member 10 is formed slightly smaller than the inner diameter of the molded filter 20. In the present embodiment, the annular member 10 is formed in a single coil shape, but may be formed into a continuous circle or ellipse by welding the end of the wire.

In FIG. 3, a plurality of fixtures 1 are disposed on the same circumference in a plurality of fold portions 20 a of the molded filter 20, and the annular member 10 is held by them.
The number of fixtures 1 arranged in the same plane can be selected as appropriate, but 3 to 6 is preferably used. As the number of fixtures 1 is less than three, it tends to be difficult to hold the annular member 10 stably. As the number of fixtures 1 is increased, the number of parts increases and the assembly work becomes complicated. This is because it has been found that productivity tends to decrease. The arrangement of the fixture 1 can be selected as appropriate. However, when the fixtures 1 are arranged at equiangular intervals, the position of the fold portion 20a held by the fixture 1 is not biased, and the molded filter 20 is deformed into an irregular shape. Can be prevented.
Moreover, in this Embodiment, as shown in FIG. 4, although the some fixing tool 1 and the cyclic | annular member 10 were arrange | positioned in the longitudinal direction of the shaping | molding filter 20 at three steps at substantially equal intervals, the fixing tool 1 and the cyclic | annular member 10 are arranged. The number of arrangements and the arrangement interval in the longitudinal direction can be appropriately selected according to the cross-sectional area and length of the molded filter 20.

Next, the fixed state of the fixture 1 and the annular member 10 will be described in detail.
As shown in FIG. 3 and FIG. 4B, the fixture 1 holds the fold 20 a inside the molded filter 20 by the holding part 2. The fixture 1 clamps the fold portion 20a by the elasticity of the connecting portion 8, but the concave and convex portions 4a and 4b (see FIG. 1B) formed on the clamping surfaces 3a and 3b of the clamping pieces 2a and 2b mesh with each other. The fold 20a can be securely held. Note that if an adhesive is applied to the sandwiching surfaces 3a and 3b, the fixing to the fold 20a can be performed more firmly, and the stability and reliability of the fixing can be improved.
The annular member 10 is inserted through a notch portion 7a formed on the upper surface side of the holding portion 6a (6b) of the fixture 1, and is engaged and held by the engaging portion 7b. At this time, since the locking claw 7c is formed so as to protrude from the connecting portion 8 side to the concavo-convex portions 4a, 4b, the locking claw 7c is locked to the upper end portion of the annular member 10. The annular member 10 is engaged and held by the engaging portion 7b due to its elasticity, but the annular member 10 can be more reliably held by the locking claw 7c, and the molded filter 20 can be tilted or overturned. However, the annular member 10 does not fall off, and the fixing stability and reliability are excellent.

Note that the fixing tool 1 can be easily attached in a state in which a crease serving as a fold portion 20a is formed on the base cloth and is developed on a plane before the molding filter 20 is molded into a chrysanthemum shape. After attaching all the fixtures 1, the ends of the base fabric are joined together to form a cross-shaped chrysanthemum shape.
The annular member 10 is tilted so as to avoid the fixture 1 attached to the upper stage side, and is inserted to the position of the lower stage fixture 1, and then brought into a horizontal state, and as described with reference to FIG. The diameter is expanded until it substantially matches the position of the opening of the notch 7a and is inserted into the notch 7a. When the hands are released from the knobs 10a and 10b, the annular member 10 is engaged with the engaging part 7b while being reduced in diameter by the restoring force, and is locked by the locking claw 7c and firmly held. Similarly, the annular member 10 can be attached in the order of the middle stage and the upper stage.
In the present embodiment, the notch portion 7a, the engaging portion 7b, and the locking claw 7c are formed on the upper surface side of the holding portions 6a and 6b of the fixture 1, but these positions are not limited thereto. Instead, it may be formed on the lower surface side of the holding portions 6a and 6b, or may be formed on the side portion of the connecting portion 8.

The operation of the bag filter having the shape holder according to Embodiment 1 of the present invention configured as described above will be described.
3 and 4, in a normal suction filtration state, each part of the molded filter 20 is pulled inward, but the deformation is restricted by the annular member 10 disposed in the longitudinal direction, and the entire molded filter 20 is controlled. As a result, the excessive deformation and breakage are prevented.
Further, when dust is removed by backwashing, each part of the molded filter 20 expands outward, but the deformation is restricted by the plurality of fixtures 1 connected by the annular member 10, and the deformation of the molded filter 20 as a whole is suppressed. While suppressing, it can prevent that the shaping | molding filter 20 will be in the state which has expanded. After backwashing (after jet jetting), the elasticity of the annular member 10 allows the molded filter 20 to be pulled back inward and reduced in diameter, and the removal force can be enhanced. The dust adhering to the outer peripheral surface can be efficiently and reliably removed, the filtration efficiency can be prevented from being lowered, and the filtration performance can be maintained for a long time.

As described above, since the bug filter according to Embodiment 1 of the present invention is configured, the following operation can be obtained.
(1) Since the fixture has a clamping portion for clamping the fold portion inside the molded filter, the fixture can be simply fixed simply by clamping the fold portion of the molded filter with the clamping portion, and the assembly workability Excellent.
(2) Since the fixture has a holding portion that is connected to the clamping portion and protrudes from the fold portion toward the axial center of the molded filter, a plurality of fixtures are arranged on the same circumference in a plurality of fold portions of the molded filter. By doing so, the annular member can be held by the holding portion along the inner periphery of the molded filter, and the assembly workability and the shape holding performance of the molded filter are excellent.
(3) Since the plurality of fixtures are connected by the annular member by holding the annular member by the holding portions of the plurality of fixtures arranged on the same circumference, the vertical wire like a conventional retainer Is unnecessary, and the weight can be reduced by reducing the number of parts, which is excellent in mass production and resource saving.
(4) Even if the molded filter is deformed inward by suction filtration, the molded filter can be prevented from being deformed at the place where the annular member is disposed along the inner periphery of the molded filter. As a whole, the amount of deformation can be reduced to reduce the occurrence of breakage, and the molded filter has excellent durability and long life.
(5) By connecting a plurality of fixtures fixed to the folds of the molded filter via an annular member, the annular member is arranged even if the molded filter is deformed outward during backwashing by pulse jet. Since the molded filter can be prevented from being deformed by a plurality of fixtures, the amount of deformation of the molded filter as a whole can be suppressed to reduce the occurrence of breakage, and it has excellent durability and long life. The molded filter swelled outward between the annular member and the annular member can be pulled back inward to prevent the molded filter from remaining swelled, and the shape retention and the certainty of removal are excellent.
(6) Since the holding part of the fixture has a pair of holding pieces opposed to each other, and one end sides of the pair of holding pieces are connected by an elastic connecting part, they are arranged to face each other by the elasticity of the connecting part. By simply adjusting the gap between the clamping pieces, the molded filter can be attached to and detached from the fold portion, and the attachment / detachment workability is excellent.
(7) Since the clamping part of the fixture has an irregular part formed on the clamping surface of each clamping piece, the fold part of the molded filter can be firmly clamped by the engagement of the irregular part. It can reliably prevent vertical movement and back-and-forth movement and disconnection, and is excellent in fixing reliability and stability.
(8) By forming an engagement portion with which the annular member is engaged with the holding portion of the fixture, the annular member can be securely held and a plurality of fixtures can be firmly connected, and there are few parts. With the score, it is possible to efficiently prevent the inward and outward deformation of the molded filter, and it is excellent in stability and certainty of shape retention.
(9) By forming the annular member in the shape of a single coil, it can be expanded and contracted in the radial direction by elasticity, and it is elastic without completely constraining the deformation of the molded filter inward and outward. By allowing minute deformation, stress can be prevented from concentrating between the clamping part and the fold part of the fixture, and the fixture can be prevented from falling off or the molded filter can be damaged, resulting in excellent durability and long life. .
(10) Since the annular member formed in a coil shape has elasticity, the annular member is annularly expanded in the radial direction so as to substantially coincide with the position of the notch formed in the holding portion of the fixture. After the member is inserted from the notch portion, the annular member is firmly held by the engaging portion and the locking claw by engaging the engaging member with the engaging member while contracting the annular member in the radial direction by the restoring force. Can be surely prevented, and the fixing stability is excellent.
(11) Since there is a knob portion extending from both ends of the annular member formed in a single coil shape or a knob portion protruding in the vicinity of both ends, the knob portion is picked by hand and circumferential direction The diameter of the annular member can be easily expanded and contracted in the radial direction simply by moving it to the engagement part, and can be easily attached to and detached from the engaging part formed on the holding part of the fixture. Excellent in properties.
(12) Since the molded filter and the fixing tool or the fixing tool and the annular member are not fixed by fixing means such as adhesion or welding, they can be easily replaced in the event of a failure, and are recovered when the molded filter is discarded. It can be used repeatedly and is excellent in resource saving and environmental protection.

(13) By installing a shape holder in the molded filter, it is possible to suppress deformation of the molded filter (filter body) at the time of suction filtration, reduce the occurrence of breakage of the molded filter, and durability and long life In addition, the molded filter swelled outward during backwashing can be pulled back inward to prevent the molded filter from remaining swelled, and the shape retention is excellent.
(14) Since the shape holder is composed only of a fixture and an annular member and does not use a vertical wire material like a conventional retainer, the number of parts can be reduced and the weight can be reduced. The filtration performance can be improved.
(15) By installing the shape holder in the molded filter, the shape of the molded filter can be securely held without reducing the filtration area of the molded filter, and the dust can be surely removed. A decrease in filtration performance can be prevented, and the filtration efficiency and stability are excellent.
(16) By arranging a plurality of fixtures and annular members of the shape holder in the longitudinal direction of the molded filter, the shape can be securely held in correspondence with molded filters of various lengths. It is excellent in design flexibility and versatility.
(17) By fixing the clamping part of the shape holder to the fold part of the molded filter, the fixing tool can be securely and firmly fixed, and the fixing reliability, stability, durability, and shape Excellent retention reliability.

( Reference Example 1 )
5A is a cutaway perspective view of a main part of the bag filter provided with the shape holder in Reference Example 1 , and FIG. 5B is an enlarged perspective view of the main part of the shape holder used in the bag filter in Reference Example 1 . FIG. In addition, the same code | symbol is attached | subjected to the thing similar to Embodiment 1, and description is abbreviate | omitted.
In FIG. 5, the shape holder 15A used in the bag filter in Reference Example 1 is different from that of the first embodiment in that a fixing portion 7e is formed together with a notch portion 7d on the side portion of the connecting portion 8 of the fixing device 1A. And a point provided with a plurality of connecting members 10 </ b> A that are formed in a coil spring shape (string-wound spring shape) and connect adjacent fixtures 1 </ b> A instead of the annular member 10.
In FIG. 5B, reference numeral 10c denotes a hook-shaped or annular locking portion formed at the end of the connecting member 10A and locked to the fixing portion 7e.
Further, as the fixing portion 7e, a holding hole may be provided in the holding portions 6a and 6b and the connecting portion 8 so that the hook-like locking portion 10c of the connecting member 10A is locked. Note that the fixing portion 7e may be formed on the upper surface side or the lower surface side of the holding portions 6a and 6b as in the first embodiment.

As described above, since the bug filter in Reference Example 1 of the present invention is configured, the following operation can be obtained.
(1) Since the fixture has a clamping portion for clamping the fold portion inside the molded filter, the fixture can be simply fixed simply by clamping the fold portion of the molded filter with the clamping portion, and the assembly workability Excellent.
(2) Since the fixture has a holding portion that is connected to the clamping portion and protrudes from the fold portion toward the axial center of the molded filter, a plurality of fixtures are arranged on the same circumference in a plurality of fold portions of the molded filter. By doing so, adjacent fixtures can be connected by a connecting member, and the assembly workability and the shape retention of the molded filter are excellent.
(3) Since the plurality of fixing members are connected by the connecting member by connecting the adjacent fixing members of the plurality of fixing members arranged on the same circumference, like a conventional retainer A vertical wire is not required, the number of parts can be reduced and the weight can be reduced, and it is excellent in mass productivity and resource saving.
(4) Even if the molded filter is deformed inward by suction filtration, the molded filter can be prevented from being deformed at the location where the connecting member is disposed on the inner peripheral side of the molded filter. The amount of deformation can be reduced to reduce the occurrence of breakage, and the molded filter has excellent durability and long life.
(5) By connecting a plurality of fixtures fixed to the folds of the molded filter via a connecting member, the connecting member is arranged even if the molded filter is deformed outward during backwashing by pulse jet. Since the molded filter can be prevented from being deformed by a plurality of fixtures, the amount of deformation of the molded filter as a whole can be reduced, and the occurrence of breakage can be reduced. The molded filter swollen outward in between can be pulled back inward to prevent the molded filter from remaining swollen, and the shape retention and the certainty of removal are excellent.
(6) The holding part of the fixture has a pair of holding pieces opposed to each other, and one end side of the pair of holding pieces is connected by a connecting part having elasticity, so that the holding parts arranged to face each other by the elasticity of the connecting part The gap between the pieces can be easily adjusted, and the molded filter can be attached to and detached from the fold portion, and the attachment / detachment workability is excellent.
(7) Since the clamping part of the fixture has an irregular part formed on the clamping surface of each clamping piece, the fold part of the molded filter can be firmly clamped by the engagement of the irregular part. It can reliably prevent vertical movement and back-and-forth movement and disconnection, and is excellent in fixing reliability and stability.
(8) When the fixing part where the end part of the connecting member is fixed is formed in the connecting part or holding part of the fixing tool, adjacent fixing tools can be easily connected with the connecting member, and the number of parts is small. Thus, the inward and outward deformation of the molded filter can be efficiently prevented, and the shape retention stability and reliability are excellent.
(9) Since the connecting member formed in the shape of a coil spring has elasticity, the connecting member is fixed to the fixing portion formed in the holding portion of the adjacent fixture in a state where the connecting member is stretched or compressed. Is firmly held between the adjacent fixtures, and the detachment of the connecting member can be surely prevented, and the fixing stability is excellent.
(10) Since the molded filter and the fixing tool or the fixing tool and the connecting member are not fixed by fixing means such as adhesion or welding, they can be easily replaced in the event of a failure, and are recovered when the molded filter is discarded. It can be used repeatedly and is excellent in resource saving and environmental protection.

(11) By installing a shape holder in the molded filter, deformation at key points of the filter (filter body) during suction filtration can be suppressed, and the occurrence of damage to the molded filter can be reduced. Durability and long life In addition, the molded filter swelled outward during backwashing can be pulled back inward to prevent the molded filter from remaining swelled, and the shape retention is excellent.
(12) Since the shape holder is composed only of a fixture and a connecting member and does not use a vertical wire like a conventional retainer, the number of parts can be reduced and the weight can be reduced, and the molding filter can be lengthened. The filtration performance can be improved.
(13) By installing the shape holder in the molded filter, the shape of the molded filter can be securely held without reducing the filtration area of the molded filter, and the dust can be surely removed. A decrease in filtration performance can be prevented, and the filtration efficiency and stability are excellent.
(14) A plurality of fixtures and connecting members of the shape holder are arranged in one or more stages in the longitudinal direction of the molded filter, thereby securely holding the shape corresponding to the molded filters of various lengths. It is excellent in design flexibility and versatility.

The present invention has a simple structure, has a small number of parts, is excellent in mass productivity, can be easily attached to the inside of the molded filter, is excellent in assembling workability, and can be deformed inward and outward. The shape of the molding filter can be reliably retained by providing a shape holder that can be reliably prevented and has excellent stability of fixation and shape retention. Molding during suction filtration and backwashing The filter can be reliably prevented from being deformed, and the molded filter can be prevented from being damaged. It is possible to provide a bag filter with excellent filtration efficiency, stable filtration performance, and long life of the molded filter. By improving the filtration efficiency of the dust collector and extending the life of the filter, it can contribute to resource saving, energy saving and environmental protection.

DESCRIPTION OF SYMBOLS 1,1A Fixing tool 2 Clamping part 2a, 2b Clamping piece 3a, 3b Clamping surface 4a, 4b Uneven part 5a Convex part 5b Recessed part 6a, 6b Holding part 7a, 7d Notch part 7b Engaging part 7c Locking claw 7e Fixing part 8 connecting part 10 annular member 10A connecting member 10a, 10b knob 10c locking part 15, 15A shape holder 20 molded filter (filter body)
20a Folding part 21 Bottom cover 30 Bag filter

Claims (3)

A bag filter having a molding filter having a plurality of folds and having a horizontal cross-section formed in a chrysanthemum shape, and a shape holder provided in the molding filter,
The shape holder is
(A) and the holding portion for sandwiching the fold portion inside said molding filter and a concave-convex portion formed on the clamping face of the pair of holding pieces and each of the clamping pieces disposed opposite, the clamping portion A holding portion that is provided continuously from each of the holding pieces and protrudes toward the axial center side of the molded filter from the fold portion, an engaging portion formed on the holding portion, and a pair of holding pieces having elasticity. A plurality of fixtures arranged on the same circumference in the plurality of folds of the molded filter ,
(B) It is formed in the shape of a coil of a coil, and includes a knob portion extending from both ends thereof, or a knob portion protruding in the vicinity of both ends thereof, and is engaged with the engaging portions of the plurality of fixtures. And an annular member held by the holding part ,
A bug filter characterized by comprising: The fixture of the shape holder is formed on the upper surface side of the holder, a notch portion through which the annular member of the shape holder is inserted, and on the notch portion side above the engagement portion The bag filter according to claim 1, further comprising a locking claw formed so as to protrude . The bag filter according to claim 1 or 2, wherein the plurality of fixtures of the shape holder and the annular member are arranged in one or more stages in the longitudinal direction of the molded filter.

Images