KR20130126699A - Dust collection filter, dust collection apparatus provided with same, and manufacturing method for dust collection filter - Google Patents

Abstract

Dust collection filter which improves the dust removal efficiency at the time of regeneration of the dust collection filter, and can realize energy saving and long life of filter life by reducing the average pressure loss of the dust collection filter, and the dust collection filter It provides a dust collecting device having a.
The filter cloth P formed in the cylindrical shape is comprised by laminating | stacking the bubble layer 20 which consists of a woven fabric, and the filter layer which consists of a nonwoven fabric couple | bonded with the filter surface side at least among the said bubble layers 20, and filters the filter cloth P Dust collecting air is passed through to the side when it is filtered from the surface side, and the dust is filtered. Also, when the filter cloth P is filtered, the backflow air H is passed from the side to the filter surface side to remove the collected dust. In the filter F, one and the other of the inclination 20a and the weft 20b which comprise the woven fabric of the bubble layer 20 are inclined with respect to the circumferential direction Y of the filter cloth P formed in the cylindrical shape. It is arranged.

Description

Dust collection filter, dust collection apparatus having same, and manufacturing method for dust collection filter {Dust collection filter, dust collection apparatus provided with same, and manufacturing method for dust collection filter}

In the present invention, a filter cloth formed in a cylindrical shape is laminated with a bubble layer made of a woven fabric and a filter layer made of a nonwoven fabric bonded to at least the filter surface side of the bubble layer. Filtration is carried out from the filtration surface side of the filter cloth through the air impregnated from the filtration surface side to the filtration surface side, and further flows back from the filtration surface side of the filter cloth to the filtration surface side. The present invention relates to a dust collecting filter, a dust collecting device including the dust collecting filter, and a dust collecting filter configured to remove collected dust by passing through an air stream.

As a filter for dust collection in a dust collector, the thing (bag filter) of the form which forms a filter cloth in a cylindrical shape is used a lot. As this filter cloth, the thing comprised in the laminated state by combining the filter layer which consists of a nonwoven fabric on the filtration surface side of the bubble layer which consists of a woven fabric is used in many cases (for example, refer patent document 1). Conventionally, the woven fabric of the bubble layer in the said filter cloth is formed by weaving a warp and a weft. Generally, the dust collection filter formed in the cylindrical shape is arrange | positioned so that the direction of the inclination may be parallel to the cylindrical axis direction of the filter cloth formed in the cylindrical shape, and the direction of the weft thread is perpendicular to the said cylindrical axis direction.

In addition, dust is filtered by the dust collecting filter by operating the dust collecting device and passing the dust-containing air from the filtering surface side of the filter cloth of the filter for collecting dust to the filter surface side, but the filter surface side of the dust collecting filter is operated by the operation of the dust collecting device. If the collected dust adheres to the dust collector, the dust collecting filter will be clogged in the filter layer and the pressure loss will increase. In this case, it is necessary to remove the dust adhering to the filter layer of the dust collecting filter and return the pressure loss to a low state (hereinafter sometimes referred to as regeneration of the dust collecting filter). Therefore, a dust collecting device having a function of regenerating the dust collecting filter by passing a backflow air stream from the side to the filtration surface side when the filter for dust collecting is filtered is used (see Patent Document 2, for example).

Japanese Patent Laid-Open No. 5-269320 Japanese Patent Publication No. 2008-279405

However, as mentioned above, in the dust collector filter of patent document 1, the direction of the inclination in the woven fabric of a bubble layer is parallel with the cylindrical axis direction of the filter cloth formed in the cylindrical shape, and the direction of the weft is the said cylindrical axis direction. It was arrange | positioned so that it may become perpendicular to (the direction of inclination and weft may be reversed). In this case, even if the dust collecting filter vibrates or expands and contracts, the displacement of the filter layer in the plane direction (circumferential direction) is limited by the weft, so that the filter layer is actively stretched in the plane direction (circumferential direction). No action was taken. That is, it is not the structure which can be actively displaced to the filtration surface side (cylindrical diameter side) of the dust collector filter.

In addition, in the case where such a dust collecting filter is applied to a dust collecting device as shown in Patent Literature 2 and used, the dust collected on the filtration surface of the dust collecting filter can be removed by passage of a backflow air flow, but the filter layer as described above. Since the expansion and contraction in the surface direction is not actively performed, it is difficult to efficiently remove the dust that has entered the dust collecting filter.

In the dust collector as described above, since the removal efficiency of the dust inside the dust collecting filter cannot be improved, the average pressure loss caused by the dust collecting filter gradually increases, increasing the pressure of the backflow airflow or removing the number of times. There is a need to increase the energy consumption, and energy saving, filter life, etc. cannot be realized.

The present invention, in view of the problems of the conventional dust collecting filter, improves the dust removal efficiency at the time of regeneration of the dust collecting filter, and saves energy by reducing the average pressure loss of the dust collecting filter and filter life. An object of the present invention is to realize a dust collecting filter capable of achieving a long life, and to realize a dust collecting device including the dust collecting filter.

The filter for dust collection which concerns on this invention for achieving the said objective is comprised by laminating | stacking the filter layer which consists of the bubble layer which consists of a woven fabric, and the nonwoven fabric couple | bonded with at least the filter surface side among the said bubble layers, It is configured to pass the impregnated air from the filtration surface side of the filter cloth to the filtration surface side, and to carry out a backflow air flow from the filtration surface side of the filter cloth to the filtration surface side to remove the collected dust. As a dust collecting filter, the 1st characteristic structure is that the inclination and the weft which comprise the woven fabric of the said bubble layer are arrange | positioned inclined with respect to the cylinder perimeter direction of the said filter cloth formed in the said cylindrical shape.

According to the said characteristic structure, what is called a bubble filter in what is called a bag filter by which the filter cloth formed in the cylindrical form laminated | stacked the bubble layer which consists of a woven fabric, and the filter layer which consists of a nonwoven fabric couple | bonded with at least the filter surface side among the said bubble layers. Since one and the other of the warp and the weft which comprise the woven fabric of the cloth are arranged inclined with respect to the barrel circumferential direction of the filter cloth formed in a tubular shape, the displacement of the filter cloth formed into a tubular shape toward the filtration surface side (cylindrical diameter side) is It does not restrict | limit either by the inclination or the weft which comprises the woven fabric of a bubble layer.

In other words, when the dust attached to the dust collecting filter (hereinafter, sometimes referred to as regeneration of the dust collecting filter) is removed as described above, the backflow air flows from the side to the filtration surface side when the filter cloth is filtered. The dust attached to the filtration surface of the dust collecting filter is removed, wherein the filter cloth is displaced to the filtration surface side by the backflow air flowing from the side of the filtration cloth to the filtration surface side, and stops the backflow airflow to its original position. Is restored. In this case, if one or the other of the inclination of the bubble layer of the filter cloth and the weft yarn is not inclined with respect to the tube circumferential direction of the filter cloth formed in a cylindrical shape, the displacement of the filter cloth toward the filtration surface side is Limited by thread. Therefore, the crossing angle of the inclination and the weft in the bubble layer of the filter cloth does not change.

On the other hand, according to the above feature, since one and the other of the warp yarn and the weft yarn constituting the woven fabric of the bubble layer are arranged inclined with respect to the tube circumferential direction of the filter cloth formed in a cylindrical shape, the filter layer face direction (the circumferential direction) The displacement to is not limited to either one or the other of the warp and the weft yarn, and consequently, the displacement of the filter filter cloth toward the filtration surface side (diameter in the radial direction) is not limited (i.e., some degree of displacement is allowed). ) State. In this case, the crossing angle of the warp and the weft in the bubble layer of the filter cloth can change relatively large with the displacement of the filter cloth toward the filtration surface side.

Due to the change in the crossing angle of the warp and the weft, expansion and contraction in the plane direction of the filter layer made of the nonwoven fabric bonded to at least the filtration surface side of the bubble layer is greatly generated. And since the filter layer is comprised by the nonwoven fabric in which fine fibers are entangled, expansion and contraction of the filter layer in the surface direction changes the shape of the clearance gap between the fine fibers over the whole surface. Therefore, the dust collected in the filter layer can be properly dispersed and disintegrated (disintegrated and pulverized) while the aggregation is suppressed, and can be easily separated from the filter layer made of the nonwoven fabric.

Therefore, a dust collecting filter can be obtained that can improve dust removal efficiency and realize energy saving and long life of the filter by reducing the average pressure loss of the dust collecting filter.

The second characteristic configuration of the dust collecting filter according to the present invention is, in addition to the first characteristic configuration, an inclination angle of which one of the warp yarn and the weft yarn is inclined with respect to the tube circumferential direction of the filter cloth formed in the tubular shape is 30 to 60 degrees. It is in the range of FIG.

According to the above characteristic configuration, since the inclination angle of one of the warp yarns and the weft yarns inclined with respect to the barrel circumferential direction of the filter cloth formed in the tubular shape is in the range of 30 degrees to 60 degrees, the filter cloth formed in the tubular shape has its filter surface side (cylindrical diameter). In the direction of displacement), the restriction of displacement by one of the warp and weft yarns is reduced.

That is, if one of the warp yarns and the weft yarns is inclined at an angle of 45 degrees with respect to the barrel circumferential direction of the filter cloth formed in a cylindrical shape, the displacement of the filter cloth formed in the cylindrical shape toward the filtration surface side (cylindrical diameter side) is most likely to occur. Although it is easy, in the range which deviates from this angle, when the inclination-angle which inclines with respect to the barrel circumference direction of the filter cloth formed in the cylindrical shape of one of the inclination and the weft thread is in the range of 30 degree-60 degree, the filtration of the filter cloth formed in the cylindrical shape It is possible to more reliably cause displacement to the surface side. Displacement of the filter cloth toward the filtration surface side (cylindrical diameter side) contributes to the change of the angle of inclination of the bubble layer and the crossing angle of the weft accurately, and causes the expansion and contraction of the filter layer made of the nonwoven fabric as described above. The dust collected in the filter layer is properly dispersed and crushed while the aggregation is suppressed, so that the dust collected in the filter layer can be easily separated from the filter layer made of the nonwoven fabric.

In addition to the said 1st or 2nd characteristic structure, the 3rd characteristic structure of the dust collector filter which concerns on this invention is that the other in the said inclination and the weft thread is arrange | positioned in the cylinder axis direction of the said filter cloth formed in the said cylindrical shape.

According to the above characteristic configuration, since the other of the warp and weft yarns are arranged in the cylindrical direction of the filter cloth formed in a cylindrical shape, the expansion and contraction is less stable and stable against the force (tensile force) in the cylindrical direction of the filter cloth applied to the dust collecting filter. I can do it in a state.

The fourth feature of the dust collecting filter according to the present invention is that in addition to the first or second feature, the other of the warp yarn and the weft yarn is disposed to be inclined with respect to the cylinder axis direction of the filter cloth formed in the tubular shape. have.

According to the above characteristic configuration, since the other of the warp and weft yarns are disposed to be inclined with respect to the cylindrical axis direction of the filter cloth formed in a cylindrical shape, the filter cloth formed in the cylindrical shape is displaced to the filtration surface side (cylindrical radial direction side). The filter cloth formed into a cylindrical shape can also expand and contract in the cylindrical direction. Therefore, the displacement of the filter cloth toward the filtration surface side (cylindrical radial side) contributes to the change of the angle of inclination and weft of the bubble layer accurately. The change in the angle of crossing of the inclination of the bubble layer and the weft of the foam layer causes expansion and contraction in the plane direction of the filter layer made of the nonwoven fabric as described above, and the dust collected in the filter layer is properly dispersed and crushed while the aggregation is suppressed, and the nonwoven fabric It is possible to easily separate from the filter layer consisting of.

The fifth characteristic constitution of the dust collecting filter according to the present invention is, in addition to the fourth characteristic constitution, the inclination angle of inclination of the other of the inclined and weft yarns inclined with respect to the cylindrical axis direction of the filter cloth formed in the tubular shape of 30 to 60 degrees. It's in range.

According to the above characteristic configuration, since the inclination angle of inclination with respect to the cylindrical axis direction of the filter cloth formed in the cylindrical shape in the other side of the warp and the weft yarn is in the range of 30 degrees to 60 degrees, the displacement of the filter cloth formed in the cylindrical shape toward the filtration surface side is a bubble. It contributes more precisely to the change in the angle of intersection of the floor slope and the weft. That is, if the inclination angle of the inclination and the weft yarn inclined with respect to the cylindrical axis of the filter cloth formed in the cylindrical shape is 45 degrees, the expansion and contraction of the cylindrical filter cloth formed in the cylindrical shape is most likely to occur, but there is a deviation from this angle. In the range, if the inclination angle of the inclination and the other of the weft yarns inclined with respect to the cylindrical axis direction of the filter cloth formed in the tubular shape is in the range of 30 degrees to 60 degrees, displacement of the filter cloth formed in the tubular shape toward the filtration surface side, or the tubular shape It is possible to more surely cause expansion and contraction of the filter cloth formed in the tubular direction. The change in the angle of inclination of the bubble layer and the crossing of the weft causes stretching in the plane direction of the filter layer made of the nonwoven fabric as described above, and since the dust collected in the filter layer is properly dispersed and crushed while the aggregation is suppressed, the nonwoven fabric is made of It can be easily separated from the filter layer.

The 6th characteristic structure of the dust collector filter which concerns on this invention is that the filter cloth formed in the said cylindrical shape is cylindrical in addition to any of said 1st-5th characteristic structures.

According to the above feature, the cylindrical filter cloth is cylindrical in shape, so that the displacement toward the filtration surface side of the dust collecting filter causes the filter cloth constituting the cylindrical side circumferential surface to be evenly displaced. In addition, since no drag force is applied to the displacement at the corners, for example, in the case of being formed in an angled cylinder shape, the displacement in the radial direction of the cylindrical shape is preferably converted into a change in the crossing angle of the warp and the weft. do. In addition, since the change in the cross angle of the inclination of the bubble layer and the weft yarns causes stretching in the plane direction of the filter layer made of the nonwoven fabric as described above, the dust collected in the filter layer is properly dispersed and crushed while suppressing the aggregation, and the nonwoven fabric It is possible to easily separate from the filter layer consisting of.

As for the 7th characteristic structure of the dust collector filter which concerns on this invention, in addition to any of the said 1st-6th structure, the said bubble layer winds up the woven fabric which carried out the strip shape to spiral shape, and forms it in a cylindrical shape, and sutures it. The point is formed.

According to the above characteristic configuration, since the bubble layer is formed by winding a woven fabric in a band shape in a spiral shape, forming a cylindrical shape and then suturing it, one of the warp yarns and the weft yarns forming the woven fabric of the bubble layer, and the other of the warp yarns and the weft yarns. The dust collecting filter configured to be inclined with respect to the barrel circumferential direction of the filter cloth formed in a tubular shape can be easily manufactured without forcibly cutting the strip-shaped woven fabric. In addition, by forming in this way, the part which cannot be used in the woven fabric strip | belt-shaped in producing a dust collecting filter becomes only the triangular part of the both ends of the strip | belt-shaped.

In addition, since the inclination of a strip | belt-shaped woven fabric is normally comprised in parallel with the longitudinal direction of the strip | belt-shaped fabric, the strip | belt woven fabric wound in a spiral shape is formed in a tubular shape, and it is adjacent in a spirally wound state. When the long sides of the band-shaped woven fabric are sealed, one of the warp yarns and the other of the warp yarns constituting the bubble layer in the filter cloth formed in a tubular shape is inclined with respect to the tube circumferential direction of the filter cloth formed in the tubular shape. .

However, if the rectangular woven fabric is obliquely cut, for example, a rectangular woven fabric in which the warp or weft yarn is inclined with respect to each side can be obtained. In this case, the corner portions of the original woven fabric are not used, and the yield is not good. It is not.

Therefore, it became easy to manufacture the filter for dust collection which can manufacture easily and can use a woven fabric in a favorable yield.

The eighth feature configuration of the dust collecting filter according to the present invention is, in addition to any of the first to seventh features described above, between the upper and lower portions of the filter cloth in which the non-stretchy string is formed in the tubular shape. It is hypothesized that the filter cloth is supported in a state in which it is placed on a support formed in a cylindrical basket shape through which air can flow.

According to the above feature, the non-elastic string-like body is hypothesized between the upper part and the lower part of the filter cloth. Therefore, when the cylindrical basket-like support is inserted into the filter cloth and the filter cloth is attached to the support, By the frictional force of the filter cloth, it is possible to satisfactorily prevent the filter cloth from extending in the barrel direction, and the insertion tip of the support can be reliably inserted to the tip of the filter cloth.

In addition, when inserting a cylindrical, basket-shaped support from the opening formed at the base end side of the filter cloth and placing the filter cloth on the support, the insertion tip or outer periphery of the support moves toward the tip while contacting the inner surface of the filter cloth. Thereby, the filter cloth can be stretched in the cylindrical direction, so that the insertion tip of the support can not be inserted to the tip (desired insertion position) of the filter cloth, and the excess portion of the filter cloth can be formed between the insertion tip of the support and the tip of the filter cloth. There is. However, in the above-described configuration, the filter cloth is limited in elongation in the cylindrical direction of the filter cloth by an inelastic string-like body disposed from the top to the bottom thereof, so that the insertion tip or the outer circumferential part of the support body fits the inner surface of the filter cloth. Even if the friction force in the cylindrical direction against the filter cloth is generated while moving while touching, the filter cloth can be prevented from sagging in the cylindrical direction. However, the string-like thing which has a elasticity at least less than a filter cloth (it is called "non-elasticity" here) is used.

As a result, when the filter cloth is placed on the support, the filter cloth can be prevented from extending in the cylindrical direction by the support, and the insertion tip of the support can be reliably inserted into the tip (desired insertion position) of the filter cloth. In particular, even when the filter cloth is configured with a bubble layer that is easily stretchable in the cylindrical direction of the filter cloth, the insertion tip of the support can be reliably inserted to the tip of the filter cloth.

The 1st characteristic structure of the dust collector which concerns on this invention for achieving the said objective is arrange | positioned by supporting the dust collecting filter provided with any one of said 1st-8th characteristic structures on the support body in which air was flowable, Filtration is carried out by passing the impregnated air from the filtration surface side of the filter cloth of the filter for dust collection to the filter surface side, and when removing the dust, a backflow air flow from the side of the filter cloth of the filter for dust collection to the filter surface side is removed. It passes through and removes the collected dust.

According to the above characteristic configuration, since the dust collecting filter is supported by a support in which air is circulated, both the filtration and the dust removal in the dust collecting filter accurately shape the dust collecting filter. Sibling airflow and airflow.

In addition, at the time of the removal of the dust collected on the filter surface of the filter cloth, a backflow air flows from the side of the filter cloth in the filter for dust collection to the filter surface side to displace the filter cloth on the filter surface side. By using the dust collecting filter provided with the first to eighth features on the support, it is possible to realize good regeneration at the time of dust removal, and to save energy and reduce the filter life by reducing the average pressure loss of the dust collecting filter. A dust collector that can realize long life can be obtained.

The second feature configuration of the dust collector according to the present invention is, in addition to the first feature configuration, the high-pressure air as the countercurrent airflow while performing filtration by passing the impregnated air from the filtration surface side of the filter cloth to the filtration surface side. Intermittent spraying is used to remove the collected dust.

According to the above feature, a so-called pulse jet dust collector which removes the collected dust by intermittently injecting high pressure air as a backflow stream while performing filtration by passing the impregnated air from the filtration surface side of the filter cloth to the filtration surface side. For this reason, the filter cloth in the filter for dust collection is largely displaced to the filtration surface side by high pressure air, and changes the inclination angle of the bubble layer of the said filter cloth and the crossing angle of the weft yarn significantly. In addition, since the backflow air is intermittently injected, the displacement of the filter cloth as described above toward the filtration surface side is intermittently repeated.

Therefore, the expansion and contraction of the filter layer of the dust collecting filter in the plane direction is intermittently repeated due to the large change in the inclination of the bubble layer of the filter cloth and the crossing angle of the weft, and dust collected in the same filter layer is appropriately suppressed while aggregation is suppressed. Since it is dispersed and crushed, it is possible to realize better regeneration at the time of dust removal, and to realize energy saving and longer life of the filter by reducing the average pressure loss of the dust collecting filter.

The third feature configuration of the dust collecting device according to the present invention is, in addition to the first or second feature configuration, tension imparting means for imparting tension in the tubular direction of the filter cloth formed in a tubular shape with respect to the filter for dust collection. It is in the point provided.

According to the above feature, the dust collecting filter includes tension imparting means for imparting tension in the tubular direction of the filter cloth formed in a tubular shape, so that the dust collecting filter is removed when the dust collected on the filter surface of the filter cloth is removed. When the filter cloth is filtration of the filter cloth, the tension imparting means imparts a stable restoring force when the filter cloth is displaced to the filter surface side by the backflow air flowing from the side to the filter surface side.

In addition, for example, when the warp yarns and the weft yarns are arranged in a state inclined with respect to the cylindrical axis direction of the filter cloth formed in a cylindrical shape, the tension imparted by the tension applying means increases the filter cloth along the cylindrical axis direction. That is, it acts in the direction in which the angle formed by the cylindrical direction of the filter cloth and the inclination becomes small. Further, since the displacement of the filter cloth toward the filtration surface side acts in a direction of increasing the angle between the cylindrical axis of the filter cloth and the inclination, the tension due to the tension applying means and the force due to the displacement of the filter cloth toward the filtration surface side are balanced. When the tension is appropriately achieved, the displacement of the filter cloth toward the filter surface side is attenuated while vibrating while the filter cloth is displaced to the filter surface side and returned to the balanced state. Therefore, the change of the inclination of the bubble layer of the filter cloth and the crossing angle of the weft according to the displacement of the filter cloth toward the filter surface side also vibrates equally, and the dust collected in the same filter layer is properly dispersed and crushed while the aggregation is suppressed. Therefore, a dust collecting apparatus capable of realizing better regeneration at the time of dust removal and realizing energy saving and longer life of the filter by reducing the average pressure loss of the dust collecting filter can be obtained.

For example, in the case where one or the other of the warp yarn and the weft thread is parallel to the cylindrical axis direction of the filter cloth formed in a cylindrical shape, the vibration as described above is unlikely to occur, but the tension applied by the tension applying means is applied to the filter surface side of the filter cloth. As a drag against displacement, the filter cloth tries to return to its original state quickly after displacement to the filtration surface side. As a result, the change in the angle of inclination and weft of the bubble layer of the filter cloth also occurs quickly. Similarly, the dust collected in the same filter layer is properly dispersed and crushed while the aggregation is suppressed. It acts to bounce off by changing the crossing angle of. Therefore, a dust collecting apparatus capable of realizing better regeneration at the time of dust removal and realizing energy saving and longer life of the filter by reducing the average pressure loss of the dust collecting filter can be obtained.

The manufacturing method of the filter for dust collection which concerns on this invention for achieving the said objective forms the filter cloth comprised by laminating the bubble layer which consists of a woven fabric, and the filter layer which consists of a nonwoven fabric couple | bonded with at least the filter surface side among the said bubble layers. As a method for producing a dust collecting filter,

The characteristic constitution is that one and the other of the warp yarns and the weft yarn constituting the woven fabric of the bubble layer are inclined with respect to the tube circumferential direction of the filter cloth formed in the tubular shape to form the filter cloth in a cylindrical shape.

According to the said characteristic structure, since one and the other in the inclination and the weft which comprise the woven fabric of a bubble layer are inclined with respect to the barrel periphery direction of the filter cloth formed in the tubular shape, the said filter cloth is formed in a tubular shape, The said 1st characteristic structure It is possible to obtain a filter for dust collection.

1 is an overall configuration diagram of the dust collector of the present invention.
2 is a longitudinal sectional view showing a structure in which a dust collecting filter is attached to a support.
3 is a cross-sectional view showing the structure of the filter cloth of the dust collecting filter.
It is a top view which shows the bubble layer of a filter cloth.
5 is a view showing a state change of the filter cloth attached to the support.
6 is a view showing a state change of the filter cloth attached to the support.
7 is a view showing a state change of the filter cloth attached to the support.
It is a figure which shows the method of forming the dust collecting filter which concerns on embodiment in a cylindrical shape.
It is a figure which shows the method of forming the dust collecting filter which concerns on other embodiment to cylindrical shape.
It is a figure which shows the method of forming the dust collecting filter which concerns on other embodiment to cylindrical shape.
11 is a longitudinal sectional view and a cross sectional view showing the structure of a filter cloth and a band-shaped woven fabric of a dust collecting filter according to another embodiment.
It is a longitudinal cross-sectional view which shows the state which attached the filter cloth and strip | belt-shaped woven fabric of FIG. 11 to the support body.

(Configuration of Dust Collector)

Based on FIG. 1 and FIG. 2, the dust collecting apparatus of this invention is demonstrated.

In the dust collector of the present invention, as shown in FIG. 1, the interior of the casing 2 is partitioned by a partition wall 3 to contain the dust-containing air introduction chamber 4 (also called the dirty side) and the purification air chamber 5 (clean). Also referred to as the side).

The air intake chamber 4 has a tapered drop dust collecting portion 4b at the lower portion thereof, and a drop dust discharge port 4c is provided at the bottom of the tapered shape. Further, a vacuum-containing air introduction port 4a for introducing the vacuum-containing air A into the vacuum-containing air introduction chamber 4 is provided at the side portion of the vacuum-containing air introduction chamber 4.

The purge air chamber 5 is connected to the purge air suction pipe 6 provided with the suction device 7. In addition, a high pressure air inlet tube 8 is provided in which the compressed air tank as the high pressure air supply means B is connected to the other end side while closing the one end side while penetrating the side wall of the purification air chamber 5. However, a compressor for supplying high pressure air is connected to the compressed air tank. The valve 11 for switching supply and stop of the high pressure air into the high pressure air inlet pipe 8 is provided on the high pressure air inlet pipe B side of the high pressure air inlet pipe 8.

The high pressure air inlet pipe 8 is provided with the high pressure air jet nozzle 9 in the position corresponding to each upper part of the some opening part 3a formed in the partition wall 3. As shown in FIG. By the opening / closing operation of the valve 11, it is possible to switch between the state of sending high pressure air as the countercurrent air flow H to each of the high pressure air blowing nozzles 9 and the state of not sending. However, a control device (not shown) is connected to this valve 11, and the difference between the gas pressure in the vacuum-containing air introduction chamber 4 and the gas pressure in the purifying air chamber 5 is greater than or equal to the set value by a pressure detection unit (not shown). In this case, that is, when dust adheres to the dust collecting filter F and the average pressure loss increases, the valve 11 is temporarily opened, and the high pressure air is blown into each of the high pressure air blowing nozzles 9. It is configured to blow out.

Next, the structure of each dust collecting filter F and the structure which attaches the dust collecting filter F to the opening part 3a of the partition wall 3 are demonstrated.

(Composition of Filtration Cloth)

As shown in FIG. 3, the filter cloth P which comprises the dust collecting filter F is the filter layer which consists of the bubble layer 20 which consists of a woven fabric, and the nonwoven fabric couple | bonded with the filtration surface side of the said bubble layer 20 ( 21a) and the filter layer 21b which consists of a nonwoven fabric bonded to the side when it is the filtration of the said bubble layer 20, It is comprised, This filter cloth P is formed in the shape of the bag which opened the upper part, and the filter for dust collection (F) is comprised.

As shown in FIG.4 (a), the bubble layer 20 is comprised from the woven fabric of strip | belt shape in which the inclination 20a and the weft 20b were orthogonal, and a gap was not clogged in a natural state. It is. The bubble layer 20 and the filter layers 21a and 21b are entangled by a needle punch. However, as for the bonding between the bubble layer 20 and the filter layers 21a and 21b, various bonding methods, such as bonding by thermal fusion besides entanglement bonding, can be adopted. The filter layers 21a and 21b may be configured to include only the filter layer 21a on the side of the bubble layer 20 and the surface of the filter layer 21a and 21b. Hereinafter, although the filter layers 21a and 21b are collectively described as the filter layer 21, when it described in this way, the structure provided only the filter layer 21a or the structure provided with both the filter layers 21a and 21b. It shall be one or both of.

In manufacturing the cylindrical dust-collecting filter F, the bubble layer 20 which combined the filter layer 21 has the inclination 20a and the weft 20b as shown to FIG. 8 (a) and FIG. 8 (b). ), A strip-shaped woven fabric woven in a state orthogonal to each other, is cut into a rectangle that becomes inclined with respect to each side of the woven fabric, and the sides thereof are closed (n, m). It is formed in a tubular shape.

By configuring in this way, one and the other of the inclination 20a and the weft 20b which comprise the woven fabric of the bubble layer 20 are inclined with respect to the barrel circumferential direction Y of the filter cloth P formed in the cylindrical shape. (Hereinafter, it may be expressed as bias.)

Here, one of the inclination 20a and the weft yarn 20b in the bubble layer 20 of the dust collector filter F formed in the tubular shape was formed in the cylinder circumferential direction Y of the filter cloth P formed in the tubular shape. The inclination angle (angle α in FIG. 4B) which is inclined with respect to each other is configured to be within a range of 30 degrees to 60 degrees.

That is, when the inclination angle α (consisting of 45 degrees in Fig. 4 (b)) is in the range of 30 degrees to 60 degrees, the filter cloth P formed in a tubular shape has its filtration surface side (diameter in the radial direction). ), The displacement of one of the warp yarns 20a and the weft yarn 20b is less limited, and the displacement is a change in the crossing angle between the warp yarns 20a and the weft yarns 20b of the bubble layer 20. Will contribute correctly. And the change of the crossing angle of the inclination 20a of the bubble layer 20 and the weft 20b is a direction along the surface direction (circumference direction Y) of the filter layer 21 which consists of a nonwoven fabric as mentioned above. Stretching occurs and dust collected in the filter layer 21 is properly dispersed and crushed while aggregation is suppressed, so that the dust can be easily separated from the filter layer 21 made of a nonwoven fabric.

In addition, the inclination angle (the angle β in FIG. 4 (b)) in which the other of the inclination 20a and the weft thread 20b inclines with respect to the cylinder axis direction X of the filter cloth P formed in the cylindrical shape is , 30 degrees to 60 degrees.

That is, when the inclination angle which inclines with respect to the barrel axial direction X of the filter cloth P in which the other in the inclination 20a and the weft 20b was formed in the cylindrical shape is 45 degree as shown in FIG.4 (b), a cylindrical shape Stretching in the direction along the cylindrical direction X of the filter cloth P formed in the most easily occurs, but in the range which deviates from this angle, the filter cloth in which the other in the inclination 20a and the weft 20b was formed in the cylindrical shape. When the inclination angle inclined with respect to the barrel axis direction X of (P) is in the range of 30 degree-60 degree, the displacement to the filtration surface side of the filter cloth P formed in the cylindrical shape, or the filter cloth P formed in the cylindrical shape The expansion and contraction in the direction along the barrel axis direction X of can be more surely produced.

Therefore, expansion and contraction of the direction along the cylindrical axis direction X contributes to the change of the angle of intersection of the inclination 20a and the weft 20b of the bubble layer 20 correctly, and the inclination 20a of the bubble layer 20. The change in the crossing angle between the weft and the weft 20b causes expansion and contraction in the direction along the plane direction (circumferential direction Y) of the filter layer 21 made of the nonwoven fabric as described above, and thus is collected in the filter layer 21. The dust is properly dispersed and crushed while the aggregation is suppressed, so that the dust can be easily separated from the filter layer 21 made of the nonwoven fabric.

Here, the crossing angle of the inclination 20a and the weft 20b of the bubble layer 20 is comprised so that it may become the range of 60 degree | times to 120 degree | times.

(Filter for dust collection and its mounting structure)

Next, the mounting structure which mounts the dust collecting filter F to the dust collector 1 is demonstrated.

As shown in FIG. 2, the dust-collecting filter F is comprised so that it may be attached to the opening part 3a in the state attached to and supported by the support body C. As shown in FIG. The support body C welds a straight rod-shaped support bar 51 and a circular support ring 52 in a planar view provided in a state spaced apart in the longitudinal direction of the support bar 51, so that air can flow. It is formed in a cylindrical basket shape. However, the flange part 3f of diameter larger than the diameter of the opening part 3a provided in the partition wall 3 is provided in the edge part on the one side of the support body C, and this flange part 3f is the said opening part ( It is supported by the peripheral part of 3a). Moreover, the pressure contact support part 3b provided with the convex part which protrudes to the inner diameter side is provided in the cylinder shape perpendicularly at the periphery part of the opening part 3a in the partition wall 3 at the side of the inlet chamber 4. In the attached state of the dust collecting filter F, a snap ring 3s fitted to be biased in the diameter-expanded direction is provided directly below the flange portion 3f of the support C. The snap ring 3s is expanded, and the filter cloth P is pressed from the inside in a state in which the filter cloth P is fitted to the convex portions of the snap ring 3s and the pressure-contacting support part 3b. In this way, the dust-collecting filter F and the support body C are in the state fixed integrally with the opening part 3a.

In installing the dust-collecting filter F to the said support body C, in the bottom part of the dust-collecting filter F formed in the user cylinder shape, it has a disk shape of substantially the same diameter as the support ring 52. A formed bottom plate 53 is provided. This prosthesis bottom plate 53 is a member independent of the support body C, and is supported by the bottom part of the dust collecting filter F comprised in a user cylinder shape. In addition, since the weight body 54 is provided in the state mounted on this prosthetic bottom plate 53, as shown in FIG. 2, the prosthetic bottom plate 53 collects the filter F for dust collection by weight. The bottom portion of the substrate C is pressed to be in a state of being spaced apart from the lowermost support ring 52a of the support C. At this time, a tension | tensile_strength generate | occur | produces on the circumferential wall surface of the filter F for dust collection in the cylindrical cylinder axis direction X. FIG. That is, the weight body 54 is a tension provision means which gives tension to the filter F for dust collection in the cylinder axis direction X. As shown in FIG.

(Driving of dust collector)

Next, with reference to FIGS. 5-7, operation | movement of the dust collector 1 provided with the dust collecting filter F comprised as mentioned above is demonstrated.

FIG. 5A shows a state of the dust collecting filter F in a state in which the operation of the dust collector 1 is stopped (called an operation stop state). FIG.5 (b) is a schematic diagram which shows the state of the inclination 20a and the weft 20b of the bubble layer 20 in a driving stop state. In this figure, although the inclination 20a and the weft 20b are substantially orthogonal, in fact, it extends along the axial direction X of the filter cloth P formed in the said cylindrical shape slightly by the self-weight of the filter cloth P, etc. The angle β formed by the inclined 20a and the cylindrical axis direction X of the filter cloth P formed in the tubular shape is in a state of becoming slightly smaller.

Fig. 6A is a state in which the dust collector 1 is operated to perform filtration (called a filtration operation state). In the filtration operation state, dust is collected on the filtration surface of the filtration cloth P by passing the impregnated air A toward the filtration surface side of the filtration surface P from the filtration surface side. At this time, as shown in FIG.6 (a), the filter cloth P is displaced to the side (inner side of the support body C) if it is filtration. And as shown to FIG. 6 (b), the distance between inclination 20a becomes small, and the angle which the inclination 20a and the cylindrical axis direction X of the filter cloth P formed in the said cylindrical shape make ( β) is in a state of becoming slightly smaller.

In the operation stop state of the dust collector 1 and the filtration operation state, as shown in Figs. 5A and 6A, the lowermost support ring 52a and the beam in the support C are Between the mold | die bottom plate 53, some clearance gap is formed by extension | stretching of the filter cloth P by the mass of the weight body 54. As shown in FIG.

FIG. 7A is a state in which the dust adhering to the filtration surface of the filter cloth P is removed (referred to as a removal state) in the operating state of the dust collector 1. In the removed state, the high-pressure air as the backflow air H is temporarily blown to remove dust collected while passing the impregnated air A from the filtration surface side of the filter cloth P toward the filtration side. So-called pulse jet system.

That is, the high-pressure air flow as the countercurrent air flow H from the inside of the cylinder of the dust collecting filter F toward the outside of the cylinder has a filter cloth P formed in the tubular shape of the dust collecting filter F, on its filtration surface side ( That is, by displacing largely toward the side where a diameter becomes large, as shown in FIG.7 (b), the angle (beta) which the inclination 20a and the cylinder axis direction X of the filter cloth P formed in the cylindrical shape made becomes large. And the filter cloth P formed in the cylindrical shape will be in the state contracted along the cylinder axis direction X, and will be raised until the bottom plate 53 for prosthetics touches the lowest support ring 52a in the support body C. Move.

In addition, since the high-pressure air is ejected repeatedly at regular intervals, for example, the filter cloth of the dust collecting filter F repeats the state displaced toward the filtration surface side and the original state, and thus the angles α and β are also Since it changes intermittently and stretches in the direction along the plane direction of the filter layer 21 also occur intermittently, the dust collected in the filter layer 21 is properly dispersed and crushed while aggregation is suppressed.

However, in the above configuration, the displacement of the filter cloth P of the dust collecting filter F toward the filtration surface side is a force in the contraction direction in the cylindrical cylindrical direction X of the dust collecting filter F. Is converted. Therefore, the filter cloth P is made to balance the tension | pulling toward the cylindrical cylinder direction X by the weight body 54 mentioned above with the force of the shrinkage direction by expansion to the outer side of the dust collecting filter F. The displacement toward the filtration surface side and the expansion and contraction in the direction along the axial direction (X) are vibrated well, and the change of the crossing angle between the inclination 20a and the weft yarn 20b appears in the vibrating state, and the filter layer 21 The dust collected in) is appropriately dispersed and crushed while aggregation is further suppressed.

(Result of verification experiment)

Hereinafter, based on Table 1, the experimental result which was performed in order to verify the effect of this invention is demonstrated.

This experiment was carried out under the condition that the air flow rate of the vacuum air A and the total amount of dust contained therein were approximately constant.

In Examples 1 and 2, when the inclination 20a and the weft 20b in the bubble layer 20 are arrange | positioned inclined with respect to the barrel axis direction X of the filter cloth P, ie, the bubble layer with a bias ( 20 is the case where the dust-collecting filter F comprised using 20) is used, and when Example 1 does not provide tension with the weight body 54 among them, Example 2 uses tension with the weight body 54. In case of grant.

In Comparative Examples 1 and 2, the warp yarn 20a and the weft yarn 20b in the bubble layer 20 are the circumferential direction Y and the axial direction X of the filter cloth P (that is, positive) In the case of using a conventional dust collecting filter (lattice-shaped), Comparative Example 1 is a case where the tension is applied by the weight body, and Comparative Example 2 is the case where the tension is applied by the weight body.

In each of the above Examples 1 and 2 and Comparative Examples 1 and 2, the pressure loss ΔPmax immediately before removal and the pressure loss ΔPmin immediately after removal (all units were Pascals) were measured. These measurement results and the pressure loss ratio before and after removal calculated by these numerical values are shown in Table 1.

From Table 1, it can be seen that the pressure loss immediately after removal is significantly reduced in Examples 1 and 2 as compared with Comparative Examples 1 and 2. In addition, in the case of Example 2 to which tension was applied by the weight body 54, the pressure loss immediately after the removal was clearly lower than that in Example 1 to which tension was not applied. In addition, the pressure loss ratio before and after removal shows substantially the same numerical value in Example 1 and 2, ie, when the filter F for dust collection comprised from the bubble layer 20 with a bias was used, and Comparative Examples 1 and 2, ie When the dust collecting filter F composed of the bubble layer 20 without bias is used, the pressure loss ratio before and after the removal is larger than that when the dust collecting filter F composed of the bubble layer 20 with bias is used. have.

As a result, in the case where there is no bias, removal of dust is not sufficient as compared with the case where there is a bias, and it is shown that the removal efficiency in the dust collector filter cannot be improved. Therefore, by implementing the present invention in which the inclination 20a and the weft 20b in the bubble layer 20 are inclined with respect to the tube circumferential direction Y of the filter cloth P, the filter F for dust collection is performed. It was found that good regeneration can be realized at the time of removing the dust.

[Other Embodiments]

Next, another embodiment will be described.

(1) In the above embodiment, the dust collecting filter F of the present invention is intermittently sprayed with high pressure air as the countercurrent air H while the introduction of the dust-containing air A is continued, Although it applied to the so-called pulse jet type dust collector which removes the dust collected by F), it is also possible to apply it to the other type dust collector. For example, the introduction of the vacuum air A is stopped, and the purification air chamber 5 side is made to be slightly higher than the vacuum air introduction chamber 4 side, and the air flow is continuously reversed (dust collecting filter F). It is also possible to apply to the so-called reverse cleaning dust collector which removes the collected dust by passing through from the side to the filtration surface side.

In such a configuration, the basket-like support C and the weight body 54 constituted by the straight rod-shaped support bar 51 and the support ring 52 may not be provided. That is, although the dust collecting filter F is formed in a user cylindrical shape, although not shown in figure, it is comprised so that the dust collecting filter F may be installed in the upward direction with respect to the opening part of a partition wall. Moreover, the prosthetic bottom plate of a user cylindrical bottom part is suspended by the spring which biases upwards. Then, the prosthetic ring formed in an annular shape for prosthesis is mounted on the cylindrical dust collecting filter F, spaced apart in the cylindrical axis direction. That is, the retaining ring becomes the support C, and the spring becomes the tension imparting means.

In such a configuration, the countercurrent air flow H at the time of the removal of dust adhering to the direction of the vacuum air A at the time of filtration and the filtration surface of the filter cloth P is different from that of the above embodiment. It is reversed. That is, the dust-containing air A at the time of filtration passes from the inside of the cylinder of the cylindrical dust collecting filter F toward the outside of the cylinder, and the backflow airflow H at the time of removing the dust is a cylindrical house. It passes toward the inside of a cylinder from the outside of the cylinder of the true filter F.

(2) In said embodiment, the partition wall 3 is equipped with two or more opening parts 3a for attaching the filter F for dust collection, as shown in FIG. 2, about each of these opening parts 3a. A dust collecting filter F is mounted. In FIG. 1, eight dust collecting filters F are attached, but the number of the dust collecting filters F can be arbitrarily changed according to the scale of the dust collecting apparatus 1, and the dust collecting filter F as shown in FIG. You may comprise so that the row of the filter F may be provided in multiple rows.

(3) In the above embodiment, the support C is provided with three support rings 52, and six support bars 51 are shown so as to be spaced apart from the support rings 52 to be fixed. The number of the support rings 52 or the number of the support bars 51 is arbitrary in the range which does not prevent air flow. In addition, the method of fixing the support bar 51 and the support ring 52 can be arbitrarily selected as long as it is a fixing method that can secure necessary strength, such as screwing, in addition to the welding described above. It can be arbitrarily selected as long as the strength can be secured.

In addition, in the said embodiment, although the outer diameter of the support body C is formed in the substantially same diameter as the inner diameter of the filter F for dust collection, the support body C is inserted in the filter F for dust collection, and the said collector In installing the dust filter F on the support body C, the outer diameter of the support body C is made into the inside diameter of the dust collecting filter F, in order to prevent the dust collecting filter F from extending in the cylinder axis direction X. It may be formed with a slightly smaller diameter.

(4) In the above embodiment, when the difference between the gas pressure in the vacuum-containing air introduction chamber 4 and the gas pressure in the purifying air chamber 5 is equal to or higher than the set value, the valve 11 is opened and the high pressure air is blown out. Although each of the nozzles 9 is configured to send high pressure air as the countercurrent air flow H, the present invention is not limited to this configuration. For example, a time interval for sending high pressure air to each of the high pressure air jet nozzles 9 may be set, and high pressure air may be sent to each of the high pressure air jet nozzles 9 at regular time intervals. Moreover, you may comprise so that the valve 11 may be operated manually, without providing a control means. However, this valve 11 can apply various valves, such as an electromagnetic valve and a manual switching valve, according to the form of switching of supply and stop of the said high pressure air.

(5) In the above embodiment, the filter cloth P is formed in a cylindrical shape to form a dust collecting filter F. However, the filter cloth P is not limited to a cylindrical shape, for example, a polygonal cylindrical shape or an elliptical shape having a triangular cross section or more. It may be comprised. In addition, a cross-sectional shape in which the inner angle of one or more corner portions is 180 degrees or more, for example, a shape having a star shape or a large number of wrinkles may be used.

(6) In said embodiment, each of the inclination 20a and the weft 20b in the woven fabric of the bubble layer 20 is inclined with respect to the barrel axis direction X of the filter cloth P formed in the cylindrical shape. Although, by the weight of the weight body 54, the prosthetic bottom plate 53 is configured to press the bottom of the dust collecting filter F to be spaced apart from the lowermost support ring 52a of the support C. It is not limited to a structure. For example, as shown in FIG.10 (a) and FIG.10 (b), the inclination 20a is arrange | positioned along the tubular direction X of the filter cloth P formed in the cylindrical shape, and the weft 20b is formed in the cylindrical shape. It is arrange | positioned inclined in the barrel circumferential direction Y of the filter cloth P, ie, the other of the inclination 20a and the weft thread 20b is arrange | positioned along the cylinder axis direction X of the filter cloth P formed in the cylindrical shape. You may also do it. In this way, it can be made into a stable state without expansion and contraction with respect to the force in the direction along the cylindrical direction X of the filter cloth P applied to the dust collecting filter F, especially the tension force of a perpendicular | vertical downward direction.

However, in such a filter cloth P, as shown to FIG. 10 (a) and FIG. 10 (b), the inclination 20a is arrange | positioned in parallel with the longitudinal direction of a strip | belt-shaped woven fabric, and the weft thread 20b is the strip | belt. The woven fabric inclined with respect to the direction orthogonal to the longitudinal direction of the woven fabric of the shape can be produced by cutting to a desired length with a cutting line and sewing both sides indicated by m and n in the same drawing. If comprised in this way, it can use without leaving a woven fabric and can improve a yield.

Moreover, in order to incline the inclination 20a and the weft 20b with respect to the barrel axis direction X, in order to suppress the elongation of the direction along the barrel direction X by the self-weight of the filter cloth P, etc., the filter cloth P Hanging thread for suspending and supporting the bottom part of) may be arrange | positioned separately from the inclination 20a and the weft 20b.

(7) In the above embodiment, in forming the cylindrical dust-collecting filter F, as the bubble layer 20, a band-shaped woven fabric woven in a state in which the warp 20a and the weft yarn 20b are orthogonal to each other. Was cut into a rectangle that would be inclined with respect to each side of the woven fabric, and was formed in a state of sewing the feces. However, it is not limited to such a form. For example, as shown in FIGS. 9A and 9B, the bubble layer 20 spirals a band-shaped woven fabric woven in a state in which the warp 20a and the weft yarn 20b are orthogonal as described above. It may be wound in a shape and formed into a tubular shape, and the long sides of adjacent band-like woven fabrics may be stitched together in a spirally wound state. In this case, however, one or the other of the warp 20a and the weft 20b are formed in the tubular shape using a woven fabric that is woven in a state where the warp 20a and the weft 20b are not orthogonal. It is also possible to form a spiral so as to incline with respect to the barrel circumferential direction Y of (P).

(8) In the above-described configuration, the weight body 54 is placed on the prosthesis bottom plate 53, and the tension is applied to the cylindrical cylindrical axis direction X with respect to the dust collecting filter F. However, it is also possible to set it as the structure which does not have the weight 54. As shown in FIG. Also in this case, one and the other of the inclination 20a and the weft 20b which comprise the woven fabric of the bubble layer 20 are inclined with respect to the barrel circumferential direction Y of the filter cloth P formed in the cylindrical shape. Since the displacement of the filter cloth P toward the filtration surface side occurs and a change in the crossing angle between the warp yarn 20a and the weft yarn 20b occurs, the dust collected in the filter layer 21 is appropriately dispersed while suppressing the aggregation. And the disintegration effect is shown.

(9) In FIG. 8, FIG. 9, and FIG. 10, the relationship between the inclination 20a and the weft 20b of the bubble layer 20, and the tubular direction X of the filter cloth P formed in the cylindrical shape is shown. Although the state which only the bubble layer 20 is sealed without bonding the filter layer 21 is shown, the sealing of the bubble layer 20 may be before or after bonding of the filter layer 21 may be sufficient.

(10) In the above-mentioned filter cloth P, as shown to FIG. 11 and FIG. 12, the woven fabric (band | band | band) formed in the filter cloth P formed in the tubular shape separately from the filter cloth P, and woven into strip | belt shape. The non-elastic string-like body 60 made of a woven fabric may be constructed between the upper and lower portions of the filter cloth P formed in a cylindrical shape (see FIG. 11). Thereby, as shown in FIG. 12, when the cylindrical-shaped basket C support body is inserted in the filter cloth P, and the said filter cloth P is laid on the support body C, the frictional force with the support body C inserted is carried out. It is possible to prevent the filter cloth P from extending in the barrel direction X by the string-shaped body 60, so that the insertion tip of the support C can be reliably inserted to the tip of the filter cloth P. .

In addition, when the filter cloth P is attached to the support body C by inserting the cylindrical and basket-like support body C from the opening formed in the base end side of the filter cloth P, the insertion point of the support body C and The outer peripheral portion or the like moves toward the distal end while contacting the inner surface of the filter cloth P, causing the filter cloth P to extend in the barrel axis direction X, whereby the insertion end of the support body C is the distal end portion of the filter cloth P (desired). It is not possible to insert into the insertion position), and there exists a possibility that the excess part of the filter cloth P may be formed between the insertion front part of the support body C, and the front end part of the filter cloth P. However, in the present configuration, since the filter cloth P is limited in elongation in the cylindrical direction X of the filter cloth P by the non-stretchy string-like body 60 disposed from the top to the bottom thereof, the support ( Even if the insertion tip or the like of C) moves while contacting the inner surface of the filter cloth P, and the friction force in the barrel direction X is generated with respect to the filter cloth P, the filter cloth P is stretched in the barrel axis direction X. It becomes the structure which can prevent suitably. In addition, in the present Example, although the string-shaped body 60 is comprised by the non-stretch strip | belt-shaped woven fabric, non-stretchy string bodies, such as a rope, may be separately. In addition, the string body 60 and the filter cloth P are hypothesized between the upper part and the lower part in the state which three places are closed at the top and 3 place at the upper part (refer the solid line of the left-right direction of FIG. 11).

Therefore, when the filter cloth P is placed on the support C, the filter cloth P is preferably prevented from extending in the barrel direction X by the support C, and the insertion tip portion of the support C is prevented. It can be inserted reliably to the front-end | tip part (desired insertion position) of the filter cloth P. In particular, the inclination 20a and the weft 20b are inclined with respect to the barrel axis direction X, for example, and the bubble layer 20 which the filter cloth P is easy to expand and contract in the barrel direction X of the said filter cloth P is made. Even if it is comprised, the insertion front end of the support body C can be reliably inserted to the front end of the filter cloth P.

In addition, in this structure, two string-like bodies 60 are provided in the inner peripheral surface (filtration-side side) of the filter cloth P, and when the support body C is inserted in the filter cloth P, the support body C is inserted. Although the tip portion and the outer circumferential surface may directly contact the string-like body 60, the direct contact with the inner circumferential surface of the filter cloth P is configured to prevent as much as possible. For this reason, when laying up the filter cloth P to the support body C, the support cloth C prevents the filter cloth P from extending | stretching to the cylinder direction X more favorably, and inserts the said support body C. The tip can be more reliably inserted up to the tip (desired insertion position) of the filter cloth P.

However, the present invention is not limited to this configuration, and the string body 60 may be provided not on the inner circumferential surface of the filter cloth P but on the outer circumferential surface (filtration surface side) of the filter cloth P. It can also be set as the structure which installs more than one string-shaped object 60. In addition, the sealing point of the string 60 and the filter cloth P and the number of sealing can be changed suitably.

The present invention provides a dust collecting filter and a dust collecting apparatus which can improve dust removal efficiency during regeneration of the dust collecting filter and realize energy saving and long life of the filter by reducing the average pressure loss of the dust collecting filter. It can be effectively used as.

1 dust collector
P filter cloth
F dust collecting filter
20 bubble layers
20a incline
20b weft
21 filter layer
60 string
A vacuum
H backflow
C support
X axis of filter cloth
Whole circumference of Y filter cloth

Claims (12)

The filter cloth formed into a cylindrical shape is comprised by laminating | stacking the bubble layer which consists of a woven fabric, and the filter layer which consists of a nonwoven fabric couple | bonded with at least the filter surface side among the said bubble layers,
The filtration is carried out by passing the impregnated air from the filtration surface side of the filter cloth to the filtration surface side, and further, a counterflow air flow is passed from the filtration surface side of the filter cloth to the filtration surface side to collect the dust. As a filter for dust collection configured to remove,
A filter for dust collection, wherein one and the other of the warp yarns and the weft yarns forming the woven fabric of the bubble layer are disposed to be inclined with respect to the tube circumferential direction of the filter cloth formed in the tubular shape. The method according to claim 1,
A filter for dust collection in which one of the warp yarns and the weft yarns is inclined with respect to the tube circumferential direction of the filter cloth formed in the tubular shape in a range of 30 to 60 degrees. The method according to claim 1 or 2,
The filter for dust collection which the other in the said inclination and the weft thread is arrange | positioned in the cylinder axis direction of the filter cloth formed in the said cylindrical shape. The method according to claim 1 or 2,
The other filter in the said inclination and the weft thread is arrange | positioned inclined with respect to the cylinder axis direction of the filter cloth formed in the said cylindrical shape. The method of claim 4,
The filter for dust collection in which the inclination | tilt angle which the other in the said inclination and the weft thread inclines with respect to the barrel axis direction of the filter cloth formed in the said cylindrical shape exists in the range of 30 degree-60 degree. The method according to any one of claims 1 to 5,
A filter for dust collection, wherein the filter cloth formed in the tubular shape is cylindrical. The method according to any one of claims 1 to 6,
The bubble layer is a dust collecting filter formed by winding a woven fabric in a band shape into a spiral shape by winding in a spiral shape. The method according to any one of claims 1 to 7,
A filter for dust collection, wherein an inelastic string-like body is installed between an upper portion and a lower portion of the filter cloth formed in the tubular shape, and the filter cloth is supported in a state in which it is attached to a support formed in a cylindrical basket shape through which air can flow. The dust-collecting filter of any one of Claims 1-8 is supported by the support body formed so that air can flow, and it arrange | positions,
Filtration is carried out by passing the impregnated air from the filtration surface side of the filter cloth in the dust collecting filter to the filtration surface side, and when removing the dust, a backflow air flow from the side of the filtration cloth of the filter for dust collection to the filtration surface side. Dust collector which passes and removes the collected dust. The method of claim 9,
A dust collecting apparatus for removing dust collected by intermittently injecting high pressure air as the countercurrent stream while performing filtration by passing impregnated air from the filtration surface side of the filter cloth to the filtration surface side. The method according to claim 9 or 10,
And a tension imparting means for imparting tension in the cylindrical axis direction of the filter cloth formed in a tubular shape with respect to said dust collecting filter. A method for producing a dust collecting filter comprising a tubular form of a bubble layer made of a woven fabric and a filter cloth formed by laminating a filter layer made of a nonwoven fabric bonded to at least the filter surface side of the bubble layer.
A method for producing a dust collecting filter, wherein one or the other of the warp and the weft yarn constituting the woven fabric of the bubble layer is inclined with respect to the tube circumferential direction of the filter cloth formed in the cylindrical shape to form the filter cloth in a cylindrical shape.

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