JP7236713B1 - retainer - Google Patents

Abstract

To provide a retainer which is lighter than conventional technology and can reduce maintenance burden and labor burden. The retainer 1 supports the filter cloth 2 to form the bag filter type dust collector 1 . The retainer 1 includes an internal bone wire 11 arranged in the center, a plurality of external bone wires 12 arranged around the internal bone wire, and a ring member 13 for fixing the internal bone wire and the external bone wire. The outer frame wire 12 is formed by coating a metal wire with a resin. The inner bone wire 11 and the ring member 13 are fixed by a wedge structure 21 . The outer frame wire 12 and the ring member 13 are fixed by a wedge structure 25 .

Description

TECHNICAL FIELD The present invention relates to a retainer that forms a bag filter type dust collector by supporting a filter cloth.

In factories such as steelworks, a bag filter type dust collector is provided. The retainer supports bag-shaped filter cloths, and by arranging a plurality of these, a bag filter type dust collector is formed. A bag filter type dust collector collects dust contained in exhaust gas from a factory or the like with a filter cloth. The gas that has passed through the filter cloth is released to the outside.

In general, the exhaust gas from the factory is of high temperature and high pressure, and forms a one-way flow from the inside of the factory to the outside air. As a result, dust adheres to the outer surface of the filter cloth, causing clogging.

Therefore, a pulse jet is appropriately injected to form a flow in the opposite direction to shake off the dust on the outer surface of the filter cloth. Collect and dispose of dust that falls. This prevents clogging.

In general, a retainer is formed from a plurality of longitudinal wires arranged in a circumferential direction and a plurality of ring members arranged vertically by connecting the plurality of longitudinal wires, and has a cylindrical shape and a basket shape. Become. The vertical wire rod and the ring material are made of metal, and the vertical wire rod and the ring material are fixed by welding (Patent Document 1).

Japanese Patent Application Laid-Open No. 2001-001093

The retainer according to the prior art is relatively heavy and labor intensive during assembly and disposal.

In addition, the exhaust gas contains harmful components, which may corrode (rust) the retainer. As a result, it becomes an obstacle when replacing the filter cloth. Further corrosion requires the retainer itself to be discarded. In this case, it is necessary to disassemble separately, and the maintenance burden is also large.

Furthermore, the metal retainer corrodes at an early stage, and therefore needs to be replaced more frequently, resulting in a large life cycle cost burden.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and to provide a retainer that is lightweight and can reduce the burden of maintenance and labor.

The present invention for solving the above problems is a retainer that forms a bag filter type dust collector by supporting a filter cloth. The retainer includes an inner bone wire arranged in the center, a plurality of outer bone wires arranged circumferentially around the inner bone wire, and a ring member for fixing the inner bone wire and the outer bone wire.

Alternatively, the retainer includes an internal bone wire arranged in the center, a plurality of external bone wires arranged circumferentially around the internal bone wire, and a ring member for fixing the internal bone wire or the external bone wire. .

Since the whole is mainly supported by the inner bone wire, the number of outer bone wires can be reduced compared to the conventional technology. This makes it possible to reduce the weight. In addition, since the number of outer frame wires is small, assembly is easy.

In the above invention, preferably, the outer frame wire is resin-coated or is a resin-based material containing fiber-reinforced plastic. The inner bone wire is a resin-based material that is resin-coated or contains fiber-reinforced plastic.

Since the inner bone wire and the outer bone wire are made of a resin-based material and the ring member is made of resin, corrosion can be prevented. As a result, the attachment and detachment of the filter cloth is not hindered.

In the above invention, preferably, the inner bone wire and the ring member are fixed by a first wedge structure, and the outer bone wire and the ring member are fixed by a second wedge structure.

This allows fixation without welding. Therefore, a resin-based material can be used for the inner bone wire and/or the outer bone wire. As a result, the maintenance burden and labor burden can be reduced.

In the above invention, preferably, the orientation of the wedges of the first wedge structure and the orientation of the wedges of the second wedge structure are opposite to each other.

As a result, the wedge structure can be maintained even when the filter cloth is replaced.

In the above invention, preferably, the retainer is formed of an upper half portion and a lower retainer half portion. , is arranged so that the U-shaped portion is closed inward at the lower end of the outer bone wire.

As a result, the length of the wire rod can be shortened, which facilitates handling during assembly and dismantling.

In the above invention, preferably, the outer frame wires of the upper half of the retainer and the outer frame wires of the lower half of the retainer are alternately arranged in plan view.

This makes it possible to impart a twisting motion to the filter cloth during pulse jetting.

In the above invention, preferably, there is a portion near the center of the outer bone wire where the ring member and the outer bone wire are not fixed by a wedge.

As a result, the shape of the retainer is maintained even when the retainer is erected.

In the above invention, preferably, the axial length of the inner bone wire is shorter than the length of the outer bone wire in the axial direction.

As a result, a flexible structure can be realized while maintaining appropriate rigidity. As a result, dust adhesion can be suppressed, and the pulse jet working efficiency is improved.

In the above invention, preferably, the outer bone wire comprises an outer bone wire upper portion and an outer bone wire lower portion, and the outer bone wire upper portion and the outer bone wire lower portion are separated, and the outer bone wire upper portion and the outer bone wire lower portion are separated. The side portion is axially movable with respect to the bone wire.

As a result, a shortened state can be achieved, and workability at the time of carrying-in is improved.

In the above invention, preferably, the outer bone wire comprises an upper portion of the outer bone wire and a lower portion of the outer bone wire, the upper portion of the outer bone wire and the lower portion of the outer bone wire are separated from each other, and the upper portion of the outer bone wire is separated from the lower portion of the outer bone wire before using the retainer. When the retainer is used, the outer bone wire upper portion and the outer bone wire lower portion move away from the inner bone wire.

Thereby, it can be shortened before use, for example, at the time of loading.

In the above invention, preferably, there is provided connecting means for connecting one ring member for fixing the internal bone wire and another ring member for fixing the external bone wire.

This improves the integrity of the retainer.

The present invention for solving the above-mentioned problems is a retainer that forms a bag filter type dust collector by supporting a filter cloth, comprising a plurality of outer rib wires arranged in a circumferential shape, and a ring member fixing the outer rib wires. , wherein the outer frame wire is formed by coating a metal wire with a resin.

The outer frame wire is resin-coated to prevent corrosion.

The retainer of the present invention is lighter than the prior art.

The retainer of the present invention can reduce maintenance burdens and labor burdens compared to conventional techniques.

Outline comparison of the conventional technology and the technology of the present application Back filter type dust collector Overall configuration diagram in the first embodiment The figure which shows the connection of the upper half part and the lower half part in 1st Embodiment. The configuration diagram of the wedge structure in the first embodiment. Operation explanatory diagram of the wedge structure in the first embodiment Effect explanatory drawing of the wedge structure in 1st Embodiment Assembly explanatory drawing in the first embodiment Overall configuration diagram in the second embodiment The block diagram of the wedge structure in 2nd Embodiment Effect explanatory diagram in the second embodiment Effect explanatory drawing of the wedge structure in 2nd Embodiment Assembly explanatory drawing in the second embodiment Overall configuration diagram in the third embodiment Exploded configuration diagram of the third embodiment Explanatory drawing of expansion and contraction operation in the third embodiment Explanatory drawing of expansion and contraction operation in the third embodiment The figure which shows the scramble in 3rd Embodiment modification The figure which shows the scramble in 3rd Embodiment modification The figure which shows the scramble in 3rd Embodiment modification Overall configuration diagram in the modified example

~Outline~
FIG. 1 is a conceptual diagram for comparing the outlines of the conventional technology and the technology of the present application. The retainer 3 supports the bag-shaped filter cloth 2 . The filter cloth 2 is closed at one end and open at the other end. Although the material of the filter cloth is not limited, polypropylene, polyester, polyamide, vinylon, cotton and the like are generally used.

FIG. 2 is a schematic configuration diagram of a bag filter type dust collector. A plurality of filter cloths 2 supported by retainers 3 are arranged vertically in the longitudinal direction. An opening is provided in the top plate of the apparatus, and the filter cloth 2 is inserted and supported by the top plate. Thereby, the bag filter type dust collector 1 is formed.

A conventional retainer consists of a plurality (12 in the illustrated example) of vertical wires arranged in the circumferential direction, and a plurality of ring members arranged vertically by connecting the plurality of vertical wires by welding. It is formed in the shape of a cylinder and a cage.

Retainers are used during assembly, normal operation, pulse jetting, filter cloth replacement, and retainer disposal.

On the other hand, the retainer 3 of the technology of the present application is formed from an internal bone wire 11 , an external bone wire 12 and a ring member 13 . Compared to the prior art, the present invention is more effective in assembling the retainer, during normal operation, during pulse jetting, during filter cloth replacement, and during retainer disposal. Details will be described below.

~Overview of the present application~
FIG. 3 is an overall configuration diagram of the retainer. The retainer 3 is formed from an internal bone wire 11 , an external bone wire 12 and a ring member 13 .

The inner bone wire 11 is arranged axially in the center. The inner bone wire 11 is a pipe-shaped fiber-reinforced plastic member or a metal member such as aluminum. A resin-coated metal may also be used. It may be made of resin. It may be rod-shaped.

A plurality of outer bone wires 12 (four in the illustrated example) are arranged around the inner bone wire 11 . The outer frame wire 12 is a metal wire coated with resin. Polyethylene, vinyl chloride, polyester and the like are generally used as coating resins. The exoskeleton 12 may be an uncoated stainless steel wire, an aluminum wire, or a titanium wire. A fiber-reinforced plastic member may be used.

The ring member 13 fixes the inner bone wire 11 and the outer bone wire 12 . An example of the fixing structure is a wedge structure (described in detail in a portion corresponding to FIG. 5).

The ring member 13 is provided with an opening 23 through which the internal bone wire 11 is inserted in the center and an opening 27 through which the external bone wire 12 is inserted in the peripheral portion. The central portion and the peripheral portion are connected by connecting portions radially extending from the center.

Although the material of the ring member 13 is not limited, a heat-resistant resin is preferable. It may be the same as the coating resin of the outer frame wire 12 .

The ring members 13 are arranged at predetermined intervals in the vertical direction. For example, if the total length of the retainer 3 is 6m, they are arranged at intervals of 0.3m to 1m.

~ Outline effect ~
Returning to FIG. 1, the effect of this embodiment will be described by comparing the conventional technology and this embodiment.

The prior art is formed by welding metal members and is relatively heavy (for example, 15-30 kg per 6 m, two-person work). On the other hand, in the present embodiment, since the inner bone wire 11 is mainly supported, the number of the outer bone wires 12 can be reduced. As a result, it is possible to reduce the weight (for example, 5 kg per 6 m, one person working).

In the illustrated example, the number of outer bone wires is reduced from 12 to 4, but the dust collection function is the same or better.

The weight reduction reduces the labor burden when assembling the retainer, arranging the retainer, replacing the filter cloth, and disposing of the retainer.

In the prior art, it is difficult to assume that a member (corresponding to the internal bone wire 11 of the present embodiment) is arranged inside the cylinder because it is considered to be an obstacle to the pulse jet.

Conventional technology is formed by welding metal members, and there is a risk of corrosion (rusting). As a result, an obstacle such as the occurrence of friction occurs when the filter cloth is replaced. On the other hand, in this embodiment, the outer frame wire 12 is resin-coated and will not corrode. As a result, there is no friction, the filter cloth can be easily replaced, and the maintenance burden can be reduced.

Furthermore, as corrosion progresses in the prior art, the retainer itself must be scrapped after a relatively short life cycle. In contrast, the present embodiment has a long life cycle because it does not corrode. In this respect as well, the maintenance burden can be reduced.

At the time of discarding the retainer, the conventional technology is formed by welding metal members, is difficult to disassemble, and needs to be transported while maintaining the shape of the retainer. On the other hand, this embodiment does not use welding and can be easily disassembled into the inner bone wire 11, the outer bone wire 12, and the ring member 13, and is transported in the state of each member. This reduces the labor burden when discarding the retainer.

In the prior art, it is difficult to assume that a member is arranged inside the cylinder because it was considered to be an obstacle to the pulse jet. In contrast, in the present embodiment, an airflow is formed along the internal bone wire 11 during pulse jetting and reaches the lower portion. That is, the effect of the pulse jet is ensured.

~ Detailed structure of the present application ~
The outer frame wire 12 may be a so-called single piece, but may be combined with two upper and lower pieces as shown in FIG. In the illustrated example, the internal bone wire 11 is a so-called one piece.

FIG. 4 is a diagram showing the connection between the upper half and the lower half. The retainer 3 is formed from a retainer upper half portion 3A and a retainer lower half portion 3B. Correspondingly, the exoskeleton wire 12 is formed from an exoskeleton wire 12A and an exoskeleton wire 12B.

The exoskeleton wire 12A and the exoskeleton wire 12B are substantially the same member. One end has a U-shaped portion and the other end does not have a U-shaped portion (straight).

In the retainer upper half portion 3A, the U-shaped portion 29A of the outer bone wire 12A is arranged to open outward at the upper end. The retainer lower half portion 3B is arranged so that the U-shaped portion 29B of the outer bone wire 12B is closed inward at the lower end.

The U-shaped portion 29A at the upper end suspends and supports the top plate (see FIG. 2). The end of the filter cloth 2 is protected by the U-shaped portion 29B at the lower end.

For example, if the total length of the retainer 3 is 6m, the length of the outer bone wires 12A and 12B is 3m. By shortening the length of the wire rod, handling becomes easier, and the labor burden at the time of retainer assembly and retainer disposal is further reduced. Also, since the outer bone wires 12A and 12B are made of substantially the same material, the number of parts can be reduced.

Furthermore, the outer frame wire 12A of the retainer upper half portion 3A and the outer frame wire 12B of the retainer lower half portion 3B are arranged so as to be staggered in plan view.

The ring member 13 fixes four exoskeleton wires, and in the example of FIG. In the ring member 13 corresponding to the interface between the upper half portion 3A and the lower half portion 3B, the outer bone wire 12B is fixed and the outer bone wire 12A is inserted.

As a result, the filter cloth 2 is somewhat twisted during the pulse jetting, and the effect of the pulse jetting becomes more reliable.

~First embodiment wedge structure~
The prior art is formed by welding metal members. On the other hand, in this embodiment, the outer frame wire 12 is resin-coated and cannot be fixed by welding. Therefore, in this embodiment, it is fixed by a wedge structure. Furthermore, the inner bone wire 11 is also fixed by a wedge structure.

FIG. 5 is a configuration diagram of a wedge structure according to the first embodiment. The inner bone wire 11 and the ring member 13 are fixed by a wedge structure 21 . The outer frame wire 12 and the ring member 13 are fixed by a wedge structure 26 .

The wedge structure 21 is formed of a wedge 22 and a wedge receiver 23 which is an opening provided at the center of the ring member 13 . The wedge 22 is inserted into the wedge receiver 23 from below in the drawing. The wedge structure 25 is formed of a wedge 26 and a wedge receiver 27 which is an opening provided around the ring member 13 . The wedge 26 is inserted into the wedge receiver 27 from above in the drawing. That is, the wedge insertion directions of the wedge structure 21 and the wedge structure 25 are opposite to each other.

FIG. 6 is an operation explanatory diagram of the wedge structure according to the first embodiment.

In the wedge structure 21 , the internal bone wire 11 is fixed to the ring member 13 by inserting the wedge 22 into the wedge receiver 23 while the internal bone wire 11 is inserted through the opening (wedge receiver) 23 .

In the wedge structure 25 , the outer bone wire 12 is fixed to the ring member 13 by inserting the wedge 26 into the wedge receiver 27 while the outer bone wire 12 is inserted through the opening (wedge receiver) 27 .

Thereby, in this embodiment, the inner bone wire 11 and the ring member 13 can be fixed, and the outer bone wire 12 and the ring member 13 can be fixed without welding.

FIG. 7 is an explanatory diagram of the effects of the wedge structure according to the first embodiment. The wedge structure 21 and the wedge structure 25 have opposite wedge insertion directions.

The left side of FIG. 7 shows a state in which the filter cloth 2 is pulled up from the bottom and attached to the retainer 3 . At this time, a force acts in the direction in which the ring member 13 is pulled up due to friction with the filter cloth 2 .

That is, the force acts in the direction in which the wedge structure 21 is loosened, while the force acts in the direction in which the wedge structure 25 is tightened. As a result, the ring member 13 is not greatly dragged, and the shape of the retainer is maintained.

The right side of FIG. 7 shows a state in which the filter cloth 2 is pulled down from the top to the bottom and removed from the retainer 3 . At this time, a force acts in the direction in which the ring member 13 is pulled down due to friction with the filter cloth 2 .

That is, the force acts in the direction in which the wedge structure 25 is loosened, while the force acts in the direction in which the wedge structure 21 is tightened. As a result, the ring member 13 is not greatly dragged, and the shape of the retainer is maintained.

Thus, when replacing the filter cloth, the filter cloth can be attached and detached while maintaining the shape of the retainer. In this respect as well, the maintenance burden can be reduced.

～Retainer Assembly～
FIG. 8 is an explanatory drawing for assembling the retainer. A schematic procedure for assembly will be described in the order of FIGS. 8A, 8B, and 8C.

In FIG. 8A, the ring members 13 are arranged at predetermined intervals with respect to the internal bone wire 11 . A wedge structure 21 is formed through the wedge to fix the inner bone wire 11 and the ring member 13 . Note that the ring members 13 at the upper and lower ends are arranged without being fixed to the internal bone wire 11 .

In FIG. 8B, the outer bone wire 12A is inserted into the opening 27 of the ring member 13 from above. A wedge structure 25 is formed by arranging a wedge at a predetermined position, applying a reaction force at the upper end, and pressing the lower end of the internal bone wire 11 . Thus, the outer bone wire 12A and the ring member 13 are fixed.

In FIG. 8C, the outer bone wire 12B is inserted into the opening 27 of the ring member 13 from below. A wedge structure 25 is formed by placing a wedge at a predetermined location and pulling the outer frame wire 12B. Thus, the outer bone wire 12B and the ring member 13 are fixed.

Thus, in this embodiment, the inner bone wire 11 and the ring member 13 can be fixed, and the outer bone wire 12 and the ring member 13 can be fixed without welding. Assembly is easy.

~Second Embodiment~
FIG. 9 is an overall configuration diagram of the second embodiment. The basic configuration in which the retainer 3 is formed from the inner bone wire 11, the outer bone wire 12, and the ring member 13 is common to the first embodiment. A wedge structure 21 formed of a wedge 22 and a wedge receiver 23 is also common to the first embodiment. In addition, if it is a common structure, a common effect can be expected. On the other hand, the wedge structure 25 of the first embodiment and the wedge structure 30 of the second embodiment are different.

FIG. 10 is a configuration diagram of the wedge structure in the second embodiment. The wedge structure 30 includes wedges 31 and 32 , a wedge receiver 33 that is an opening provided around the ring member 13 , and a fixing member 34 . The wedge 31 is inserted into the wedge receiver 33 from above, and the wedge 32 is inserted into the wedge receiver 33 from below. Further, a substantially U-shaped fixing member 34 is arranged laterally to fix the wedges 31 and 32 .

In the wedge structure 30 , the wedges 31 and 32 are inserted into the wedge receiver 33 in a state in which the outer bone wire 12 is inserted through the opening (wedge receiver) 33 , and the wedges 31 and 32 are fixed by the fixing member 34 . are fixed to the ring member 13 .

Furthermore, in the second embodiment, the wedge structure 30 includes at least a ring member that is the upper end of the retainer and is not fixed to the internal bone wire 11, a ring member that is fixed to the upper end of the internal bone wire 11, and a lower end of the retainer and is internal. The ring member that is not fixed to the bone wire 11 and the ring member that is fixed to the lower end of the internal bone wire 11 are fixed.

On the other hand, there is a portion 39 not fixed by the wedge structure 30 near the center. Note that the wedge structure 21 functions at the location 39 to fix the internal bone wire 11 to the ring member 13 . The exoskeleton wire 12 is inserted through the opening 33 and is not fixed.

FIG. 11 is an explanatory diagram of effects in the second embodiment.

Generally, the retainer 3 is assembled along the horizontal plane. As a method for erecting the retainer 3, there are a method of lifting the retainer 3 while supporting the upper side with a crane (upper left in the drawing), a method of moving the upper side while holding the lower side (upper right in the drawing), and the like.

The retainer 3 is bent due to its length, and the central portion may be bent downward (middle left in the drawing) or bent upward (middle right in the drawing). As a result, the outer bone wire 12 that receives compression and the outer bone wire 12 that receives tension are generated.

Assuming that the outer bone wire 12 is fixed in the central portion by a wedge structure, there is a possibility that a twisting motion occurs and the shape of the retainer 3 cannot be maintained.

On the other hand, in the second embodiment, the outer bone wire 12 is not restrained at the portion 39 that is not fixed by the wedge structure 30, no twisting action occurs, and the shape of the retainer 3 can be maintained.

In particular, when the outer bone wire is formed of the upper outer bone wire 12A and the lower outer bone wire 12B, the lower end of the outer bone wire 12A and the upper end of the outer bone wire 12B are displaced with respect to the ring member 13, so that the retainer 3 can be bent. can.

Thereby, when the retainer 3 is arranged substantially vertically, the shape of the retainer 3 is maintained (as shown in the drawing).

FIG. 12 is a diagram for explaining the effect of the wedge when attaching and detaching the filter cloth. Also in the second embodiment, effects similar to those of the first embodiment can be obtained. That is, also in the second embodiment, the wedges 22 and 31 are inserted in opposite directions.

The left side of FIG. 7 shows a state in which the filter cloth 2 is pulled up from the bottom and attached to the retainer 3 . At this time, a force acts in the direction in which the ring member 13 is pulled up due to friction with the filter cloth 2 .

That is, the wedge structure 30 is fixed while a force acts in the direction in which the wedge structure 21 is loosened. As a result, the ring member 13 is not greatly dragged, and the shape of the retainer is maintained.

Note that the second embodiment has a portion 39 that is not fixed by the wedge structure 30 near the center. By the way, when attaching the filter cloth 2 to the retainer 3 , the filter cloth is often new, and friction is less likely to occur than when removing the filter cloth 2 from the retainer 3 . If the filter cloth 2 can be inserted at the lower end of the retainer 3, it is believed that there will be few obstacles thereafter. Therefore, the influence of the portion 39 is small.

Since the exoskeleton is not fixed, the portion 39 has a structure in which the frictional force due to the attachment of the filter cloth and the friction when removing the filter cloth is received.

The right side of FIG. 12 shows a state in which the filter cloth 2 is pulled down from the top to the bottom and removed from the retainer 3 . At this time, a force acts in the direction in which the ring member 13 is pulled down due to friction with the filter cloth 2 .

That is, it acts in the direction in which the wedge structure 21 is tightened. Furthermore, the wedge structure 30 is fixed. As a result, the ring member 13 is not greatly dragged, and the shape of the retainer is maintained.

FIG. 13 is an explanatory view of assembly of the retainer. A schematic procedure for assembly will be described in the order of FIGS. 13A, 13B, and 13C.

In FIG. 13A, the ring member 13 is arranged at a predetermined interval with respect to the internal bone wire 11 . A wedge structure 21 is formed through the wedge to fix the inner bone wire 11 and the ring member 13 . Note that the ring members 13 at the upper and lower ends are arranged without being fixed to the internal bone wire 11 .

In FIG. 13B, the outer bone wire 12A is inserted into the opening 33 of the ring member 13 from above. When the wedges 31 and 32 are arranged in the opening 33 from above and below and the fixing member 34 is arranged from the side, the wedge structure 30 is formed above. Thus, the outer bone wire 12A and the ring member 13 are fixed.

In FIG. 13C, the outer bone wire 12B is inserted into the opening 33 of the ring member 13 from below. When the wedges 31 and 32 are arranged in the opening 33 from above and below and the fixing member 34 is arranged from the side, the wedge structure 30 is formed below. Thus, the outer bone wire 12B and the ring member 13 are fixed.

Thus, in this embodiment, the inner bone wire 11 and the ring member 13 can be fixed, and the outer bone wire 12 and the ring member 13 can be fixed without welding. Assembly is easy.

Furthermore, unlike the assembly of the first embodiment (see FIG. 8), there is no need to take a reaction force.

- Operational results of the second embodiment -
As a result of the test operation of the retainer according to the second embodiment for a certain period of time, it was possible to obtain an effect that was greater than expected compared to when the second embodiment was conceived and prototyped. In other words, it was confirmed that the attachment of dust was remarkably less than the retainer according to the conventional technology (see FIG. 1). As a result, the number of pulse jets can be reduced. Furthermore, replacement of filter cloths can also be reduced. That is, maintenance is easy.

In addition, it was confirmed that dust can be easily brushed off even during pulse jetting, compared to the retainer according to the prior art. As a result, the working efficiency of the pulse jet is improved. For example, labor can be saved, and working time can be shortened.

The inventor considered the fact that the above-expected effect was obtained as follows.

The retainer according to the prior art has a rigid structure, whereas the second embodiment has a flexible structure. When vibration occurs, the retainer according to the prior art withstands it with high rigidity, whereas the force generated by the vibration is absorbed by the flexible structure of the second embodiment.

As a result, localized fatigue fractures tend to occur in the retainer according to the prior art, whereas localized fatigue fractures are less likely to occur in the second embodiment, and a long service life can be expected.

When the filter cloth is attached, the retainer according to the prior art constrains the filter cloth and the displacement of the filter cloth is small, whereas in the second embodiment the filter cloth moves relatively freely and the displacement is large. Furthermore, in the second embodiment, the filter cloth is always slightly moved with the constant slight movement of the retainer.

While the retainer according to the prior art is presumed to vibrate in the primary mode, the entirety vibrates irregularly and in small steps in the second embodiment. As a result, dust adhesion is evenly suppressed.

As a result, it is presumed that dust adhesion suppression and pulse jet work efficiency improvement have been achieved.

The inventor has proposed a structure in which the total axial length of the inner bone wire 11 in the second embodiment is shorter than the total axial length of the outer bone wire 12, that is, the structure in which only the outer bone wire 12 is provided at both ends (no inner bone wire 11 is provided). , it is speculated that it contributes to the realization of a flexible structure while maintaining moderate rigidity. When the outer frame wire 12 is formed separately into the outer frame wire 12A and the outer frame wire 12B, the total axial length of the outer frame wire 12 is obtained by subtracting the wrap length from the sum of the length of the outer frame wire 12A and the length of the outer frame wire 12B. length.

Without adequate rigidity, the filter cloth will be displaced excessively and the cross section of the flow path cannot be ensured.

As described above, in the second embodiment, a proper balance between rigidity and flexible structure is realized, and thus a remarkable effect is obtained during use.

-Problem specific to the second embodiment-
As described above, in the second embodiment, remarkable effects are obtained during use. On the other hand, considerations at the time of transportation, especially at the time of carrying in, are not sufficient compared with those at the time of use.

The parts of the inner bone wire 11, the outer bone wire 12, and the ring member 13 can be brought to the installation site and assembled at the installation site, but if the retainers are large, they are assembled at the factory and brought to the installation site in the form of retainers. .

When assembling, the long axis of the retainer is in a vertical state, when it is loaded into a vehicle with the long axis of the retainer horizontal, and when it is installed, the long axis of the retainer is in a vertical state.

The structure in which the total axial length of the inner rib 11 in the second embodiment is shorter than the total length of the outer rib 12 is advantageous during use (described above). It was necessary to reconsider the workability when unloading the vehicle. In general, the retainer is long (for example, 6 m), and it is troublesome to handle the long object.

-Overview of the third embodiment-
In order to solve the problem of the second embodiment, the inventor considered reinforcing the rigidity of the end portion only when the retainer is carried. It is possible to reinforce the rigidity by attaching extension members to both ends of the internal bone wire 11 only when it is carried in. , is not practical.

Therefore, a structure in which the upper retainer half 3A and the retainer lower half 3B can be expanded and contracted is designed.

~ Configuration of the third embodiment ~
14 and 15 are configuration diagrams in the third embodiment. FIG. 14 is an overall configuration diagram, and FIG. 15 is an exploded configuration diagram.

In the second embodiment, as an exception, there is provided a central portion 39 where the external bone wire 12 is not fixed. It is divided into a ring member 13b for fixing the wire 12.

However, the structures of the ring member 13a and the ring member 13b are the same. Further, as in the second embodiment, the outer bone wire 12 is formed separately into an outer bone wire 12A and an outer bone wire 12B.

The internal bone wire 11 is fixed by a plurality of ring members 13a (six in the illustrated example), the external bone wire 12A is fixed by at least two ring members 13b, and the external bone wire 12B is fixed by at least two ring members 13b. be done.

That is, a structure composed of the inner bone wire 11, the ring member 13a, and the wedge structure 21, a structure composed of the outer bone wire 12A, the ring member 13b, and the wedge structure 30, and an outer bone wire 12B, the ring member 13b, and the wedge structure 30. A structure consisting of and is an independent structure. However, the outer bone wire 12A and the outer bone wire 12B are inserted through the opening 27 of the ring member 13a that fixes the inner bone wire 11. As shown in FIG. As a result, in the third embodiment as well, a portion 39 is provided in the center where the external bone wire 12 is not fixed.

A ring member 13a fixed to one end of the internal bone wire 11 is arranged between two ring members 13b fixed to the external bone wire 12A. A ring member 13a fixed to the other end of the internal bone wire 11 is arranged between two ring members 13b fixed to the external bone wire 12B.

This allows the outer bone wire 12A and the outer bone wire 12B to move axially with respect to the inner bone wire 11 .

-Operation of the third embodiment-
16 and 17 are explanatory diagrams of expansion and contraction operations in the third embodiment. FIG. 16 shows extension of the retainer upper half 3A side for the sake of simplification of explanation. For the aid of understanding, the movement of both end positions of the external bone wire 12A is added. FIG. 17 shows the extension of both ends when the retainer is installed. I am adding a moving image.

Before using the retainer, for example, at the time of carrying-in, the outer bone wire 12A and the outer bone wire 12B are on the side closer to the inner bone wire 11, and the retainer is in a shortened state.

When using the retainer, the outer bone wire 12A and the outer bone wire 12B move away from the inner bone wire 11, and the retainer is in a stretched state.

The outer bone wire 12A is inserted through the opening 27 of the ring member 13a but is not fixed, and the ring member 13a is arranged between the two ring members 13b.

This allows the ring member 13a to move freely between the two ring members 13b. On the retainer upper half portion 3A side, the upper ring member 13b is engaged with the ring member 13a in the contracted state, whereas the ring member 13a is engaged with the lower ring member 13b in the extended state. there is

When the retainer is installed vertically, the weight of the structure consisting of the inner bone wire 11, the ring member 13a and the wedge structure 21 causes the structure consisting of the inner bone wire 11, the ring member 13a and the wedge structure 21 to move toward the outer bone. The structure consisting of the wire rod 12A, the ring member 13b and the wedge structure 30 is separated.

Similarly, on the retainer upper half portion 3B side, the ring member 13a is engaged with the lower ring member 13b in the contracted state, whereas the upper ring member 13b is engaged with the ring member 13a in the extended state. is stopped.

When the retainer is installed vertically, the weight of the structure consisting of the outer frame wire 12B, the ring member 13b and the wedge structure 30 causes the structure consisting of the outer frame wire 12B, the ring member 13b and the wedge structure 30 to move the inner frame wire. 11, the ring member 13a and the wedge structure 21.

~ Effects of the third embodiment ~
Before using the retainer, that is, at the time of carrying-in, the rigidity can be reinforced by the inner bone wire 11 even at the ends by shortening the retainer. In addition, the shortened state facilitates handling. This improves the workability at the time of loading.

For example, if the total length of the retainer is about 6m in the extended state, it can be about 4m in the shortened state, and can be carried in by a 4-ton truck crane.

When the retainer is used, the third embodiment has a configuration similar to that of the second embodiment by extending the retainer. As a result, an effect equal to or greater than that of the second embodiment can be obtained.

~Modified example of the third embodiment~
In the third embodiment, a structure consisting of the inner bone wire 11, the ring member 13a, and the wedge structure 21, a structure consisting of the outer bone wire 12A, the ring member 13b, and the wedge structure 30, and the outer bone are locked by their own weight. Although the wire rod 12B, the ring member 13b, and the wedge structure 30 are integrated, there are cases where it is desired to improve the integration.

18 to 20 are diagrams showing the interplay in the modified example of the third embodiment. 18 is an exploded view, FIG. 19 is a sectional view after assembly, and FIG. 20 is a perspective view after assembly.

By connecting the ring member 13a for fixing the inner bone wire 11 and the ring member 13b for fixing the outer bone wire 12, integration is improved.

For example, the opposite end of the wedge 22 of the wedge structure 21 is extended into a wedge shape, and the wedge shape is inserted into the opening 23 of the ring member 13b for fixing the outer bone wire 12 .

~ Variation ~
In the above embodiment, a retainer having a total length of about 6 m has been described as an example, but the present invention is not limited to the above embodiment, and various modifications are possible within the scope of the technical idea.

FIG. 21 is an overall configuration diagram in a modified example. A retainer with a total length of about 3m will be explained as an example.

In the above embodiment, the internal bone wire 11 is essential, but if the retainer length is short, the internal bone wire 11 may be omitted.

In the modified example, while omitting the internal bone wire 11, the arrangement interval of the ring members 13 is set to 0.5 m to maintain the rigidity.

In the above embodiment, the retainer 3 is formed of the upper retainer half 3A and the retainer lower half 3B (see FIG. 3), but if the retainer length is short, it may be a so-called integrated body.

By the way, when a retainer is used as a bag filter type dust collector in a factory such as an ironworks, it is generally arranged such that the long axis of the retainer is in the up-down direction (vertical direction). In the specification of the present application, the longitudinal direction of the retainer is the same as the vertical direction. Exceptionally, the retainer long axis may be arranged horizontally. In that case, the up-down direction is read as the horizontal direction.

1 bag filter type dust collector 2 filter cloth 3 retainer 11 inner bone wire 12 outer bone wire 13 ring member 21 wedge structure 22 wedge 23 wedge receiver 25 wedge structure (first embodiment)
26 wedge 27 wedge receiver 29 U-shaped portion 30 wedge structure (second embodiment) (third embodiment)
31, 32 wedge 33 wedge receiver 34 fixing member 39 portion not fixed by wedge

Claims (10)

A retainer that forms a bag filter type dust collector by supporting a filter cloth,
an inner bone wire arranged in the center;
a plurality of outer bone wires arranged circumferentially around the inner bone wire;
a resin ring member for fixing the inner bone wire and/or the outer bone wire;
with
The ring member is provided with an opening through which the internal bone wire is inserted in the center and an opening through which the external bone wire is inserted in the peripheral portion ,
The inner bone wire and the ring member are fixed by a first wedge structure,
The outer frame wire and the ring member are fixed by a second wedge structure.
A retainer characterized by: The outer frame wire is resin-coated or a resin-based material containing fiber-reinforced plastic,
The retainer according to claim 1, wherein the inner bone wire is resin-coated or is a resin-based material containing fiber-reinforced plastic. The retainer according to claim 1, wherein the orientation of the wedges of the first wedge structure and the orientation of the wedges of the second wedge structure are opposite. formed from a retainer upper half and a retainer lower half,
The upper half of the retainer is arranged so that the U-shaped portion opens outward at the upper end of the outer bone wire,
The retainer according to any one of claims 1 to 3 , wherein the lower half of the retainer is arranged such that the U-shaped portion is closed inwardly at the lower end of the outer rib wire. The retainer according to claim 4, wherein the outer frame wires of the upper half of the retainer and the outer frame wires of the lower half of the retainer are arranged alternately in plan view. The retainer according to any one of claims 1 to 5, wherein the ring member and the outer bone wire are not fixed by wedges at a portion near the center of the outer bone wire. The retainer according to any one of claims 1 to 6 , wherein the total axial length of the inner rib wire is shorter than the total axial length of the outer rib wire. The outer bone wire is composed of an upper portion of the outer bone wire and a lower portion of the outer bone wire,
The outer bone wire upper part and the outer bone wire lower part are separated,
The retainer according to any one of claims 1 to 7, wherein the outer bone wire upper portion and the outer bone wire lower portion are axially movable with respect to the inner bone wire. The outer bone wire is composed of an upper portion of the outer bone wire and a lower portion of the outer bone wire,
The outer bone wire upper part and the outer bone wire lower part are separated,
Before using the retainer, the upper portion of the outer bone wire and the lower portion of the outer bone wire move toward the inner bone wire,
The retainer according to any one of claims 1 to 7, wherein when the retainer is used, the upper portion of the outer bone wire and the lower portion of the outer bone wire move away from the inner bone wire. The retainer according to claim 8 or 9, further comprising connecting means for connecting one ring member for fixing the inner bone wire and another ring member for fixing the outer bone wire.

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