JP6742664B2 - Filter device mounting structure and mounting method thereof - Google Patents

Description

The present invention relates to a filter device mounting structure in which a filter pack is mounted on a mounting frame, and a mounting method thereof.

Conventionally, there is known a filter device in which a filter pack folded in a filter material or a pleat shape is replaceably attached to an attachment frame. In such a filter device, a filter pack is attached to an attachment frame that forms a ventilation path from the side of the air inlet to the ventilation path (see, for example, Patent Document 1).

JP, 2014-217814, A

In the exchange type filter device, the mounting frame is an existing facility fixed to the air conditioning facility. On the other hand, the filter pack is regularly replaced, and is attached to the mounting frame by using a mounting member designed in advance for the mounting frame. That is, while the mounting frame is used for a long period of time, the filter pack to be replaced needs to be designed together with the mounting frame and the mounting member. This causes a problem that the size of the filter pack and the performance depending on the size cannot be given flexibility.

The present invention has been made in consideration of such circumstances, and an object of the present invention is to provide a filter device mounting structure and a mounting method thereof that can increase the degree of freedom in designing a filter pack.

In order to solve the above-mentioned problems, a mounting structure of a filter device according to the present invention forms a ventilation path, and a mounting frame having a locking portion on the downstream side of the ventilation path, and the ventilation frame with respect to the mounting frame. In a mounting structure of a filter device, which is mounted in an upstream/downstream direction of a path, and includes a filter medium having a pleated shape which is alternately bent in the upstream/downstream direction, and a filter pack having a cushioning material covering an outer peripheral surface of the filter medium The length in the upstream/downstream direction of the filter pack is larger than the length in the upstream/downstream direction of the mounting frame, the outer shape of the ventilation surface of the filter medium is smaller than the inner shape of the mounting frame, and the filter the outer shape of the pack is larger than the inner shape of the mounting frame, wherein the cushioning material is compressed and is inserted into the mounting frame, wherein the filter pack abuts the end surface of the downstream side with respect to the locking portion, wherein The frictional force of the cushioning material acts on the inner surface of the mounting frame, and the repulsive force acts on the inner surface of the mounting frame in a direction perpendicular to the mounting frame. Characterize.
Further, the method for mounting the filter device according to the present invention, in order to solve the above-mentioned problems, forms a ventilation path, and a mounting frame having a locking portion on the downstream side of the ventilation path, and alternately in the upstream and downstream directions. a filter material which forms a folded pleat shape, said preparing a filter pack having a buffer material which covers the outer peripheral surface of the filter material, the filter pack, are brought into contact with the end surface of the downstream side with respect to the locking portion, wherein The frictional force of the cushioning material acts on the inner surface of the mounting frame, and the repulsive force acts on the inner surface of the mounting frame in the direction perpendicular to the inner surface of the mounting frame. A method of mounting a filter device, which is mounted and supported in an upstream/downstream direction, wherein the length of the filter pack in the upstream/downstream direction is larger than the length of the mounting frame in the upstream/downstream direction, and the ventilation surface of the filter medium is contour is smaller than the inner shape of the mounting frame, and the outer shape of the filter pack, the much larger than the inner shape of the mounting frame, wherein the cushioning material, being inserted compressed to the mounting frame And

In the filter device mounting structure and the mounting method thereof according to the present invention, the degree of freedom in designing the filter pack can be increased.

The disassembled perspective view which shows the attachment structure of the filter apparatus of this embodiment. The perspective view of a filter device. The side view of a filter apparatus. Explanatory drawing which shows the example of an auxiliary attachment member. Explanatory drawing which shows the example of an auxiliary attachment member. Explanatory drawing which shows the example of an auxiliary attachment member. Explanatory drawing which shows the example of an auxiliary attachment member. Explanatory drawing which shows the example of an auxiliary attachment member. Explanatory drawing which shows the example of an auxiliary attachment member. Explanatory drawing which shows the example of an auxiliary attachment member.

Embodiments of a filter device mounting structure and a mounting method thereof according to the present invention will be described with reference to the accompanying drawings. The filter device mounting structure and the mounting method thereof according to the present embodiment are applied to a portion having a high wind pressure, such as an intake chamber of a gas turbine of a thermal power plant. Further, the filter device according to the present embodiment is applied to, for example, a filter device that functions as a pre-filter arranged in the uppermost stream among filter devices in which a pre-filter, a medium-performance filter, and a high-performance filter are sequentially arranged from the upstream side. To be done.

FIG. 1 is an exploded perspective view showing a mounting structure of a filter device of this embodiment.
FIG. 2 is a perspective view of the filter device 1.
FIG. 3 is a side view of the filter device 1.

Note that the lower left direction in the perspective view is the front direction, the upper right direction in the perspective view is the rear direction, the upper left direction in the perspective view is the left direction, the lower right direction in the perspective view is the right direction, the upper direction in the perspective view is the upper direction, and the perspective view. The downward direction in is defined as the downward direction. The upstream side of the gas passing through the filter device 1 is the forward direction, and the downstream side is the backward direction.

The filter device 1 includes a mounting frame 10 and a filter pack 20.

The mounting frame 10 includes a locking portion 11, a top plate 12, a bottom plate 13, a left side plate 14, and a right side plate 15. The locking portion 11 has a frame shape and has a gas outlet 17 in the center. The locking portion 11 is arranged substantially vertically, the upper end side of the locking portion 11 is the rear end side of the top plate 12, the lower end side of the locking portion 11 is the rear end side of the bottom plate 13, and the left end of the locking portion 11. The side is integrally formed with the rear end side of the left side plate 14 and the right side of the locking portion 11 is integrally formed with the rear end side of the right side plate 15. As a result, the locking portion 11 is located on the downstream side of the ventilation path. The top plate 12 and the bottom plate 13 are arranged substantially horizontally, and the left side plate 14 and the right side plate 15 are arranged substantially vertically. The left end side of the top plate 12 is joined to the upper end side of the left side plate 14 and the right end side of the top plate 12 is joined to the upper end side of the right side plate 15 by a joining method such as welding. Similarly, the left end of the bottom plate 13 is joined to the lower end of the left plate 14, and the right end of the bottom plate 13 is joined to the lower end of the right plate 15 by a joining method such as welding.

The front end sides of the top plate 12, the bottom plate 13, the left side plate 14, and the right side plate 15 form a mounting port 18 for the filter pack 20. By attaching the filter pack 20 to the attachment port 18, the attachment frame 10 serves as an air passage.

The top plate 12, the bottom plate 13, the left side plate 14, and the right side plate 15 form the mounting frame 10 in a rectangular tube shape, and the filter pack 20 is housed therein. The position of the filter pack 20 in the upstream and downstream directions of the filter pack 20 in the ventilation path is regulated by the rear end surface (downstream end surface) of the filter pack 20 contacting the locking portion 11 and being locked.

The locking portion 11, the top plate 12, the bottom plate 13, the left side plate 14, and the right side plate 15 of the mounting frame 10 can be formed by bending a metal plate, for example. For example, a flange that forms the locking portion 11 is provided at the rear ends of the metal plates that are the top plate 12, the bottom plate 13, the left side plate 14, and the right side plate 15, and the top plate 12, the bottom plate 13, the left side plate 14, and The mounting frame 10 may be formed by joining the right side plate 15. As the metal plate, for example, a stainless plate or an aluminum plate can be used.

The mounting frame 10 has a grid 19 which prevents the filter pack 20 from blowing toward the outlet 17. As the lattice 19, for example, a stainless steel or aluminum welding wire mesh or a punching metal can be used. The lattice 19 is joined to the locking portion 11 by a welding method such as welding. The lattice 19 may be omitted.

The filter pack 20 includes a filter material 21 and a cushioning material 22. The filter pack 20 is replaceably attached to the attachment frame 10. The filter material 21 is a fibrous body such as a non-woven fabric or a woven fabric made of fibers such as glass fiber and resin fiber. The filter medium 21 is formed in a pleat shape by folding a long fibrous body in a zigzag with a constant folding width, and is formed in a substantially rectangular parallelepiped shape as a whole. In the present embodiment, the folding direction of the filter medium 21 is the vertical direction, and the folds are arranged so as to alternately face the gas inlet side and the gas outlet side.

As a method for maintaining the pleated shape of the filter medium 21, a method of applying a hot melt ribbon in a vertical direction to the folds of the filter medium 21, a method of providing columns or comb-shaped strips in the vertical direction to the folds of the filter medium 21, There is a method of inserting a corrugated separator. Further, the filter medium 21 may be embossed so that the protrusions are formed on the surfaces facing each other in the folded state of the filter medium 21, and the protrusions may maintain the interval between the pleats.

The cushioning material 22 is, for example, a sheet material having a thickness of 3 to 10 mm. The cushioning material 22 has a function of sealing the gap between the mounting frame 10 and the filter pack 20 (filter material 21) to a sufficient extent to fulfill the function as a prefilter. Further, the cushioning material 22 has a function of supporting the filter pack 20 on the mounting frame 10 by the frictional force between the cushioning material 22 and the mounting frame 10. Further, since the cushioning material 22 further exerts the sealing function and the supporting function by the frictional force, the repulsive force in the direction perpendicular to the surface with respect to the mounting frame 10 is utilized to seal and support the filter pack 20 with respect to the mounting frame 10. .. It is preferable that the cushioning material 22 covers the entire outer peripheral surface of the filter material 21. Alternatively, the cushioning material 22 may cover only a necessary area. The cushioning material 22 is a material such as urethane foam, EPDM, chloroprene, or the like, and preferably urethane foam.

The thicker the cushioning material 22, the more preferable, but if the thickness exceeds 10 mm, the cushioning material 22 may peel off when the filter pack 20 is mounted. Further, since the upper end portion of the filter pack 20 is likely to be recessed, if the thickness is less than 3 mm, a gap may be opened, and the collection efficiency is reduced. If the thickness is less than 3 mm, it is necessary to strictly control the dimensional accuracy of the filter medium 21 during manufacturing. That is, when the filter material 21 is manufactured to be small in size, sufficient frictional force and repulsive force cannot be obtained at the upper part of the filter pack 20 (contact surface between the cushioning material 22 and the top plate 12 of the mounting frame 10), and the filter material drops off. Or the seal on the top may be insufficient. Further, if the filter medium 21 is manufactured to have a large size, the filter pack 20 may be crushed when the filter pack 20 is attached to the attachment frame 10. Therefore, it is preferable that the cushioning material 22 has a certain thickness so that the dimension of the filter pack 20 with respect to the mounting frame 10 depends on the cushioning material 22.

The cushioning material 22 is fixed to the filter medium 21 with an adhesive having an adhesive strength such that it does not separate from the filter medium 21 during ventilation. For example, an acrylic adhesive, a rubber adhesive, a double-sided tape or the like can be used.

The filter pack 20 is composed of a filter material 21 and a cushioning material 22, and the outer peripheral surface of the filter material 21 is not covered with a support plate such as wood, metal molded products, resin molded products or the like. For this reason, the filter medium 21 has such strength that it does not need to be supported or restrained by such a support plate, and it is necessary to maintain the interval between pleats by themselves (or assisted by the hot melt ribbon separator or the like). There is.

Further, the length (depth) in the upstream/downstream direction of the filter pack 20 may be larger than the depth of the mounting frame 10 without depending on the depth of the mounting frame 10. As a result, the filter pack 20 can protrude from the mounting frame 10 when mounted on the mounting frame 10. Further, since the filter pack 20 is fixed to the mounting frame 10 by the cushioning material 22, the mounting frame 10, and the frictional force and the repulsive force, the outer shape (dimensions in the upper, lower, left and right) of the ventilation surface of the filter material 21 is determined by the mounting frame. It is smaller than the inner shape of 10. On the other hand, the outer shape of the filter pack 20 in which the filter material 21 is covered with the cushioning material 22 is larger than the inner shape of the mounting frame 10.

Next, in the filter device 1, the mounting frame 10 and the filter pack 20 are assembled by the following method. First, the rear surface of the filter pack 20 is inserted toward the inside of the mounting frame 10 from the mounting port 18 toward the mounting frame 10. At this time, since the outer shape of the filter pack 20 is larger than the inner shape of the mounting frame 10, the cushioning material 22 is inserted while being compressed (while giving a repulsive force to the mounting frame 10). The rear end surface of the filter pack 20 is locked by the locking portion 11 of the mounting frame 10, and the assembly of the filter device 1 is completed.

In the filter pack 20, the frictional force of the cushioning material 22 acts on the surface direction of the mounting frame 10 (the inner surface of the top plate 12, the bottom plate 13, the left side plate 14, and the right side plate 15), and the repulsive force is the mounting frame. By acting in the direction perpendicular to the surface of 10, the mounting frame 10 is supported and fixed without falling. Further, since the filter device 1 is applied to a place having a high wind pressure such as an intake chamber of a gas turbine, the filter pack 20 can be pressed against the mounting frame 10 by the wind pressure and stably fixed.

Since the mounting structure of the filter device 1 in this embodiment can be mounted on the mounting frame 10 regardless of the depth of the filter pack 20, the degree of freedom in designing the filter pack 20 can be increased.

For example, when the mounting frame and the filter pack are fixed by using the mounting member in which the dimensions of the mounting frame and the filter pack are taken into consideration, the size of the filter pack must always be determined in accordance with the mounting frame and the mounting member. .. For example, when a mounting member for mounting the filter pack is already installed on the mounting frame, the degree of freedom in designing the filter pack is particularly low. As a result, even if an attempt is made to improve the performance of the filter device, there is a limitation due to the size.

For example, a conventional filter medium used a glass mat that does not require depth, but it has low efficiency. In order to make the filter medium highly efficient, it is necessary to use a filter paper such as glass and make it a pleated type. In order for such a filter medium to process the same amount of air as a conventional filter medium, the filter pack needs a large depth.

Therefore, according to the mounting structure and the mounting method of the filter device in the present embodiment, for example, when it is desired to extend the service life of the filter device, the life is long without a limitation by the mounting frame 10 and the volume (depth) is large. A filter pack can be installed. As a result, it is possible to use a filter pack having a life that matches the periodic inspection cycle of the gas turbine, for example. In addition, the efficiency of collecting dust of the filter pack 20 is improved, and the amount of dust collected per hour by the medium-performance and high-performance filter installed on the downstream side is reduced, so that the medium-performance and high-performance filter is reduced. The life can be extended.

Note that the filter pack 20 may be supported by the auxiliary mounting member with respect to the mounting frame 10 in order to make the mounting of the filter pack 20 stronger and prevent the filter pack 20 from falling off.

The auxiliary mounting member may be detachable or adjustable with respect to the mounting frame 10 or may be any member as long as it connects the mounting frame 10 and the filter pack 20. For example, FIG. ~ Examples include those shown in Fig. 10.

FIG. 4 shows an example in which the auxiliary mounting member is the stay 31. The stay 31 has insertion portions 32 at both ends. The mounting frame 10 has insertion holes 33 at the same height position on the left side plate 14 and the right side plate 15. After the filter pack 20 is assembled to the mounting frame 10, the stay 31 is mounted from the front surface of the filter pack 20. After that, the insertion portion 32 is inserted into the insertion hole 33 provided in the mounting frame 10, so that the filter pack 20 is supported by the mounting frame 10 in an auxiliary manner. The stay 31 may be appropriately prepared depending on the depth of the filter pack 20.

FIG. 5 shows an example in which the auxiliary mounting member is the frame 41. The frame body 41 has a frame portion 42 corresponding to the shape of the front surface of the filter pack 20, and a connecting portion 43 extending rearward so as to be perpendicular to the frame portion 42 and connecting to the mounting frame 10. The connecting portion 43 is fixed to the mounting frame 10 using a fixing member (not shown). The fixed position of the connecting portion 43 with respect to the mounting frame 10 may be adjustable according to the depth of the filter pack 20.

FIG. 6 shows an example in which the auxiliary mounting member is the belt member 51. The belt member 51 is a stretchable rubber-like member and is attached from the front surface of the filter pack 20 assembled to the mounting frame 10 similarly to the stay 31, and both end portions 52 are the left side plate 14 and the right side of the mounting frame 10. The plate 15 is locked in place.

FIG. 7 shows an example in which the auxiliary mounting member is the pedestal 61. The pedestal 61 is a plate-shaped member having a locking portion 62 whose front end is bent vertically upward. The rear end of the pedestal 61 has a structure for sliding with respect to the bottom plate 13 of the mounting frame 10, and the amount of protrusion of the pedestal 61 from the mounting frame 10 can be adjusted according to the depth of the filter pack 20. You can

FIG. 8 shows an example in which the auxiliary mounting member is the left and right support members 71. The left and right support members 71 are members that have one end connected to the left side plate 14 and the right side plate 15 of the mounting frame 10, and the other end that has a locking portion 72 that is bent vertically toward the front surface of the filter pack 20. The left and right support members 71 support the filter pack 20 by engaging the locking portion 72 with the front surface of the filter pack 20.

FIG. 9 shows an example in which the auxiliary mounting member is the rail member 81. The rail member 81 has a member attached to a corner portion 82 formed by the left side plate 14 and the bottom plate 13 of the mounting frame 10 and a member attached to a corner portion 82 formed by the right side plate 15 and the bottom plate 13. .. The rail member 81 has an L-shaped cross section and supports the weight of the filter pack 20 from the left and right bottom portions. The amount of protrusion of the rail member 81 from the mounting frame 10 may be adjustable.

FIG. 10 shows an example in which the auxiliary attachment member is a hook-and-loop fastener 91. The surface fasteners 91 are attached to the front end sides of the top plate 12, the bottom plate 13, the left side plate 14, and the right side plate 15 of the mounting frame 10 so as to face the cushioning material 22 of the inserted filter pack 20. This is useful when the material of the cushioning material 22 can have a male/female relationship with the surface fastener 91.

Although the mounting structure and the mounting method of the filter device according to the present invention have been described above in detail, the present invention is not limited to the above-described embodiment. Further, it goes without saying that various improvements and changes may be made without departing from the spirit of the present invention.

1 Filter Device 10 Mounting Frame 11 Locking Part 17 Outflow Port 18 Mounting Port 20 Filter Pack 21 Filter Material 22 Buffer Material 31 Stay 41 Frame Body 51 Belt Member 61 Pedestal 71 Left and Right Support Member 81 Rail Member 91 Surface Fastener

Claims (4)

An attachment frame that forms an air passage and has a locking portion on the downstream side of the air passage,
A filter pack that is attached to the attachment frame in an upstream/downstream direction of the air passage, and has a pleated filter material that is alternately bent in the upstream/downstream direction, and a cushioning material that covers an outer peripheral surface of the filter material. In the mounting structure of the filter device provided,
The length in the upstream/downstream direction of the filter pack is larger than the length in the upstream/downstream direction of the mounting frame,
The outer shape of the ventilation surface of the filter medium is smaller than the inner shape of the mounting frame, and the outer shape of the filter pack is larger than the inner shape of the mounting frame,
The cushioning material is compressed and inserted into the mounting frame,
The downstream end surface of the filter pack contacts the locking portion, the frictional force of the cushioning material acts on the inner surface direction of the mounting frame, and the repulsive force is applied to the inside of the mounting frame. A mounting structure for a filter device, wherein the mounting structure is supported by the mounting frame by acting in a direction perpendicular to a side surface. The mounting structure according to claim 1, wherein the filter pack is supported on the mounting frame by an auxiliary mounting member. The mounting structure according to claim 1, wherein the cushioning material is urethane foam. A ventilation frame is formed, and a mounting frame having a locking portion on the downstream side of the ventilation channel, a pleated filter medium that is alternately bent in the upstream and downstream directions, and a cushioning material that covers the outer peripheral surface of the filter medium are provided. Prepare the filter pack,
The filter pack is brought into contact with the end face on the downstream side with respect to the locking portion, the frictional force of the cushioning material acts on the inner surface direction of the mounting frame, and the repulsive force is the repulsive force of the mounting frame. A method for mounting a filter device, comprising mounting and supporting in the upstream and downstream directions of the ventilation path with respect to the mounting frame by acting in a direction perpendicular to an inner surface ,
The length in the upstream/downstream direction of the filter pack is larger than the length in the upstream/downstream direction of the mounting frame,
The outer shape of the ventilation surface of the filter material is smaller than the inner shape of the mounting frame, and the outer shape of the filter pack is much larger than the inner shape of the mounting frame,
A method of mounting a filter device, wherein the cushioning material is compressed and inserted into a mounting frame .

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