JP2015100729A - Bag filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a removable attachment for preventing a dust recovery bag set in a dust box of a dust discharge part of a bag filter from being pulled into the bag filter by the negative pressure collecting dust so that it is bulged.SOLUTION: An attachment is formed into such a ring shape as can be attached to and removed from the upper part of a dust box, and a dust recovery bag is inserted through the central space part of the attachment into the dust box, so that the dust recovery bag is clamped between a dust discharge part and the attachment. Moreover, the space, which is enclosed by the inner wall of the dust box and the outer side of the dust recovery bag is evacuated through a clearance of the attachment.

Description

  The present invention is a bug filter having a dust box for collecting dust in a dust discharge portion of a bag filter, and having a dust collection bag attachment for easily setting a dust collection bag in an existing dust box. Regarding filters.

  Conventionally, dust collected by a dust collector is collected in a dust box of a dust discharge portion of the dust collector. It is necessary to periodically discharge the dust in the dust box, and the dust box is removed and the dust accumulated in the dust box is transferred to another container or a dust collection bag.

  Here, in the work of transferring dust from the dust box to another container such as a dust collection bag, there was a problem of dust scattering, so one way to eliminate the transfer work is to install an empty dust collection bag in advance in the dust box. Although it is conceivable, since the dust collecting chamber in the dust collector becomes negative pressure at the same time when the dust collector is operated, there is a problem that the dust collection bag swells inside the dust collector. FIG. 6 shows a state where (a) a dust collection bag is set (b) a dust collector is operated by a conventional method.

  In order to solve the problem that the dust collection bag swells to the inside of the machine due to the negative pressure, a dust collector including a mechanism for exhausting the space between the dust collection bag and the dust box to a negative pressure is disclosed (Patent Document 1). .

  However, this method requires modification if it is to be attached to an existing dust collector, during which the dust collector cannot be operated. Also, depending on the customer, there is a case where the dust collection bag is not required because of the specification with priority on cost. Therefore, the dust collection bag can be easily attached to existing dust collectors, and even in new dust collectors, dust collection bags can be attached with additional parts without changing the design of the dust box. It was desired.

Japanese Examined Patent Publication No. 2-37235

  The present invention has been made in view of the above circumstances, and can be easily attached to an existing dust collector. Even in a new case, the dust collection bag can be attached without any problem without changing the design of the dust box. It aims to provide a bug filter with an attachment that can.

In order to achieve the above object, the invention according to claim 1 is a bag filter provided with a dust box for collecting dust in a dust discharge portion of the bag filter,
Attach a detachable ring attachment to the top of the dust box, insert the dust collection bag into the dust box through the center space of the attachment, the dust collection bag is sandwiched between the dust discharge part and the attachment, The technical means is used to create a negative pressure in the space enclosed by the inner wall and the outside of the dust collection bag.

  According to the first aspect of the present invention, even in an existing bag filter, a dust collection bag is attached after attaching a ring-shaped attachment between the dust discharge part and the dust box without requiring modification. By making the space enclosed by the inner wall and the outside of the dust collection bag negative pressure, the problem that the dust collection bag swells inside the dust collector can be solved. Even when the dust collection bag cannot be prepared, the bag filter can be operated without any problems if the attachment is removed.

  In the invention according to claim 2, the attachment includes a ring-shaped upper flange, a cylindrical cylindrical portion coupled at the upper end of the ring inner peripheral surface of the upper flange and an upper end, and a gap forming member coupled to the lower portion of the upper flange And a technical means that includes a lower flange having the same shape as the upper flange coupled to the opposite side of the upper flange via the gap forming member.

  According to invention of Claim 2, since it is an attachment of a simple structure, it can provide at low cost.

  In the invention according to claim 3, the technical means that the opening provided on the opposite side of the space of the dust box in the gap portion of the attachment is connected to the dust collection chamber of the bag filter is used.

  According to the invention described in claim 3, since the negative pressure can be supplied from the dust collecting chamber of the dust collector, no special equipment for generating the negative pressure is required. Furthermore, even if the dust collection bag is damaged, it is connected to the dust collection chamber, so there is no effect on the dust collector body.

In the invention according to claim 4,
The technical means of mounting a guide capable of easily mounting the attachment in the center of the dust box is used on the outer periphery of the cylinder portion of the attachment.

  According to invention of Claim 4, an attachment can be easily mounted | worn in the center of a dust box by providing a guide in the outer periphery of the cylinder part of an attachment. As a result, the sealability of the dust box and attachment is improved, and it is possible to easily improve the sealability in the dust collector.

  According to the present invention, by using the attachment for the removable dust collection bag, the dust collection bag can be easily attached to the existing dust collector without any problem, and the attachment can be removed even when the dust collection bag is not used. Therefore, it is possible to provide a bug filter that can operate the dust collector without any problem.

1 shows a partial cross-sectional view of a bag filter provided with an attachment according to the present invention. 1 shows an overall view of an attachment according to the invention. 1 shows a cross-sectional view of an attachment according to the invention. The simplified sectional view showing the relationship between the attachment by this invention, a dust collection bag, and a dust box is shown. The state which operated the bag filter in the state (b) which set the dust collection bag (a) using the attachment by the present invention is shown. The state which operated the bag filter in the state (b) which set the dust collection bag (a) by the conventional method is shown.

Hereinafter, the bug filter provided with the attachment of the present invention will be described.
As shown in FIG. 1, the bag filter A includes a suction device (not shown) for sucking dust generated from various machines and devices, a dust collection chamber B for introducing sucked dust, and a dust collection chamber B. It consists of filtration means C using filter paper, filter cloth, etc. that are installed to filter dust from the air.

  The attachment 1 of the present invention is attached to the lower end of a hopper D that is a dust discharge portion of the bag filter A, and fixes a dust collection bag W that collects the dust collected by the bag filter A together with a dust box E that stores the dust. It is used to do.

  FIG. 2 is an overall view of the attachment 1 of the present invention. FIG. 3 is a cross-sectional view of the attachment 1. 4 is a simplified cross-sectional view showing the relationship between the attachment 1, the dust collection bag W, and the dust box E.

The flange rib 2 is a ring that is joined to the hopper D and has the same shape as the upper opening of the dust box E. By adopting the same shape as the dust box E, it is possible to use the existing equipment (for example, packing) in the bag filter A without additional machining or replacement, and a hopper D that is a dust discharge part of the bag filter A By the joint portion of the ring, which is the flange rib 2, sealing performance can be ensured by the surface pressure of the ring.

The upper flange 3 is in contact with the lower end of the hopper D with the flange rib 2 attached to the upper part.
The lower flange 4 has the same shape as the upper flange 3, and a slight gap portion G is formed between the upper flange 3 and the upper flange 3 by a gap forming member 4 a. By making the upper flange 3, the lower flange 4 and the gap G thin and narrow, processing of the dust box E and the bag filter A main body and additional parts become unnecessary. Moreover, since the design is not required every time depending on the presence or absence of the dust collection bag, the cost can be reduced and the delivery time can be shortened.

The cylindrical portion 5 is a cylindrical member whose upper end portion is coupled to the inner peripheral portion of the upper flange 3 and whose lower end portion extends toward the lower flange 4. In addition, although it couple | bonds with the whole inner periphery of the upper flange 3, it is not couple | bonded with the whole inner periphery of the lower flange 4. FIG. That is, there is a certain space (gap) between the lower flange 4 and the cylindrical portion 5. Further, a plurality of guides 6 are provided around the cylindrical portion 5 so as to be in contact with the inner periphery of the dust box E and to form a constant gap between the dust box E and support the dust box E. An attachment can be attached to the center of the dust box E by the cylindrical portion 5 and the guide 6.

The air joint 7 communicates with a gap G between the upper flange 3 and the lower flange 4 and is connected (piped) to the dust collection chamber of the bag filter A. More specifically, the air joint 7 is attached to an opening L provided on the opposite side of the space leading to the dust box E of the gap G between the upper flange 3 and the lower flange 4. The air joint 7 is connected to the dust collection chamber B of the bag filter A.

  The dust collection bag W has its opening H fixed by being sandwiched between the flange rib 2 and the hopper D (see also FIG. 5). The closed portion K is disposed so as to pass through the inside (central space portion) of the cylindrical portion 5 and contact the dust box E.

  Air between the dust box E and the dust collection bag W is sucked from the bag filter A through the air joint 7. Thereby, the space S between the dust box E and the dust collection bag W is at a negative pressure.

  The packing 8 is in a position where the dust box E of the lower flange 4 contacts. This ensures a sealing property between the dust box E and the attachment 1.

  The edge packing 9 covers the lower end portion of the cylindrical portion 5. This is because the dust collection bag W is not damaged at the edge portion of the cylindrical portion 5. The edge packing 9 is made of plastic. Any material may be used as long as it covers the lower end of the cylindrical portion 5 and does not damage the dust collection bag W.

  Hereinafter, as an embodiment, the operation of the bug filter using the attachment 1 of the present invention and the function of the attachment 1 will be described with reference to FIGS.

  The bag filter A sucks dust and the like by a suction device (not shown), introduces dust and the like into the dust collection chamber B of the bag filter A, and is filtered by a filtering means C such as filter paper and filter cloth. The filtered dust is removed from the filtering means C and collected in a hopper D which is a dust discharge portion of the bag filter A. The dust that has been wiped off is stored in the dust collection bag W in the dust box E attached to the lower end of the hopper D from the hopper D.

  When the bag filter A is not in operation, the dust collection bag W hangs down by its own weight as shown in FIG. When the bag filter A is operated, a suction device (not shown) is activated to start sucking dust and the like. Accordingly, the air in the gap G between the upper flange 3 and the lower flange 4 is sucked from the bag filter A through the air joint 7.

  Since the gap G between the upper flange 3 and the lower flange 4 is connected to the space S between the dust box E and the dust collection bag W, the space S between the dust box E and the dust collection bag W is used as air to the bag filter A. The negative pressure is sucked. Thereby, as shown in FIG. 5B, the dust collection bag W sticks to the dust box E, and the dust collection bag W is not pulled inside the bag filter A.

  In the present invention, the dust box E uses a pail can, but may be any container that can withstand negative pressure due to suction from the bag filter A and can be attached to the lower end of the hopper D.

  When a certain amount of dust accumulates in the dust collection bag W, the operation of the bag filter A is stopped. Then, the dust collection bag W is detached from the attachment 1 and the dust box E, a new dust collection bag W is attached, and the operation of the bag filter A is resumed.

DESCRIPTION OF SYMBOLS 1 Attachment 2 Flange rib 3 Upper flange 4 Lower flange 4a Gap formation member 5 Cylindrical part 6 Guide 7 Air joint 8 Packing 9 Edge packing A Bag filter B Dust collection chamber C Filtration means D Hopper E Dust box G Crevice part H Dust collection bag Opening K Closed part L of dust collection bag Opening S provided on the opposite side to the space leading to the dust box Space between dust box and dust collection bag W Dust collection bag

Claims (4)

A bag filter having a dust box for collecting dust in the dust discharge part of the bag filter,
A removable ring-shaped attachment is attached to the top of the dust box, a dust collection bag is inserted into the dust box through a central space portion of the attachment, and the dust collection bag is sandwiched between the dust discharge portion and the attachment,
A bag filter, wherein a space enclosed by an inner wall of the dust box and an outside of the dust collection bag is made negative pressure through a gap portion of the attachment.   The attachment includes a ring-shaped upper flange, a cylindrical tubular portion coupled at the upper end to the ring inner peripheral surface of the upper flange, a gap forming member coupled to the lower portion of the upper flange, and the gap forming member The bag filter according to claim 1, further comprising: a lower flange having the same shape as that of the upper flange coupled to the opposite side of the upper flange.   The opening part provided in the said clearance gap part of the said attachment on the opposite side to the space of the said dust box is connected with the dust collection chamber of the said bag filter, The Claim 1 or Claim 2 characterized by the above-mentioned. Bug filter. The bag filter according to claim 2, wherein a guide capable of easily mounting the attachment in the center of the dust box is mounted on an outer periphery of the cylindrical portion of the attachment.