JPS6279825A - Device for cleaning bag-shaped cloth filter member in bag filter type dust collector - Google Patents

Abstract

PURPOSE:To instantaneously remove dust by fixing flat bars on which plural springs are stretched on the open side and the opposite side of a filter body frame, providing a hole for injecting air on the frame on the clean air side and supplying pulsed air pressure. CONSTITUTION:The flat bars 13 and 13' are fixed on the open side and the opposite side of the filter body frame 1 and used as the plates for reinforcing the frame 1 and fixing the spray 3 and plural springs 3 are stretched. Plural holes 30 are bored at the lower part of the frame 1 and a nozzle 6 is fitted. The nozzle is connected to a diaphragm valve 8 for generating an impulsive air pulse and a compressor. Accordingly, when dust is swept off, instantaneous pulsed air is injected from the nozzle 6, the spring 3 is instantaneously hit and vibrated, and the dust on the bag-shaped cloth filter member 2 can be effectively swept off.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a cleaning device for a bag-like fabric-cover member in a bag filter type dust collector.

(B) Conventional technology Conventionally, the cleaning means of a T-cleaning device using a bag-like fabric-passing member is usually carried out from one side of the bag-like fabric-passing member with a large number of spring spacers disposed inside the bag-like spacer. Either positive and negative air pressure is applied alternately to blow away the dust accumulated on the contaminated air side of the fabric filter; alternatively, only positive air pressure is applied from the clean air side of the bag-like fabric filter. Pulsed air pressure was supplied using a device separate from the filter, and dust accumulated on the contaminated air side was brushed off.

Q→ Problems to be Solved by the Invention When the conventional cleaning means cleans the filter bodies disposed in a large number of transit chambers, the filter chambers are sequentially cleaned.
First, -room t! The filtration operation is stopped, only this filter chamber is cleaned, and the operation is restarted when cleaning is completed. At the same time, the temporary operation of the next filter chamber is stopped and cleaning is performed, so one part of the dust collector is cleaned. The filtration area is always lost by one chamber, and in order to compensate for the filtration surface equivalent to this lost filtration area, one chamber is usually added outside to obtain the specified filtration area. It's a means.

In addition, in order to apply positive and negative air pressure alternately during cleaning, various equipment is required, such as installing a duct or using a switching damper, and since the transit chambers must be cleaned in sequence, each A separate filtration chamber must be formed, −
A partition wall between the filter chamber and the i-filtration chamber is also required, which is extremely uneconomical.

-Means for solving the problem In a bag filter complete dust collector, flat bars are attached to the open side and the opposite side of the frame of the filter body, which is made by bending a tube, and a plurality of springs are stretched between the flat bars. Close and fix one end of the frame with a filter fixing plate,
A plurality of holes are formed on the clean air side of the frame portion on the other end side to serve as an air injection portion, and the open end thereof penetrates through the fixing plate to attach a pulse air pressure supply device.

The inside of the filtration member is injected by instantaneously sending high-pressure air from the working pulse air pressure supply device to the frame and instantaneously injecting the high-pressure air into the inside of the bag-like fabric filtration member from the air injection part. The spring vibrates instantaneously, striking the filter member, causing a sudden vibration, and the filter member flutters instantaneously, resulting in contamination of the filter member. This is to brush off the dust that has accumulated on the air side.

(f) Example An embodiment of the present invention will be described below with reference to the drawings.

The filter body of FIG. 1 according to the present invention is a filter body mounting wall 1 of a dust collector.
The frame 1 of this filter body is made of a tube, which is bent into a U-shape, and one end of the upper end is fitted with a filter. It is fixed by welding to the upper part of the body fixing plate 4, and an internally threaded coupling 14 is welded to the other end of the lower part passing through the fixing plate 4. Flank bars 13 and 13'' are installed on the opposite side of the frame 1 to reinforce the frame 1 and serve as fixing plates for the springs 3, and a plurality of springs 3 are installed between the flanges and bars 13 and 13'. It's authentic.

Since the frame 1 is made of a tube, it is possible to pass fluid through it, so by drilling a plurality of holes 30 at the bottom of the frame 1 and attaching nozzles there as necessary, the frame 1 Part of the configuration of the cleaning device is also used.

Then, a nozzle 6 is attached to each hole 30 to form a lug to the air, and a diaphragm valve 8 is installed to generate an air pulse at the open end of the frame 1. Attach the air bleed pilot solenoid valve 9 and connect the piping as shown in FIG.

The structure of the diaphragm valve 8 and the structure of the pilot solenoid valve 9 are shown in FIG.

The diaphragm valve 8 receives high pressure air (
5 to 7 kglci) is the air supply I shown in FIG.
In FIG. 4, air flows in from the air supply port 18, passes through the small hole 19 from part B, and flows into part A, which is connected to pilot solenoid valve 9 by a conduit 20.
Since the valve 22 of the pilot valve 9 is closed by the spring 21, the pressure in the B, A, and A' parts becomes equal, and the diaphragm 23 is pushed down by the pressure, closing the valve 24. Therefore, air is not supplied to the frame 1, but when a pulse signal from the timer momentarily flows through the conductor 25, the electromagnetic coil 26 is momentarily excited and the movable core 27 is attracted, which causes the valve 22 to open. A,
Since the high-pressure air in section A' is injected into the atmosphere from the exhaust port 28, the pressure in section B becomes higher than that in section A. This pressure momentarily pushes up the diaphragm 23, and the high-pressure air is released from the valve 249! The air is supplied to the frame 1 as instantaneous pulsed air and is injected from the air injection section to the clean air side of the filter.

The signal from the timer to the conductor 25 is instantaneous, a pulse signal of approximately 0.04 to 0.36 seconds, and is quite shocking, so the air pressure supplied instantaneously is shown in Figure 1. The spring 3 is made to vibrate in an instantaneous impact, and the bag-shaped fabric filtering member 2 is instantaneously stamped, giving a ma-like torsional vibration. It can remove dust extremely effectively.

Next is the number of injection nozzles 6 installed, but the frame length is 1 m.
Three pieces per hit is appropriate. In addition, a rubber stopper 7 is fitted into the tube near the bent portion at the bottom of the frame 1 shown in FIG. By doing so, multiple filter bodies can be cleaned using one diaphragm valve 8 and one pilot solenoid valve 9, as shown in FIG. can.

Next, FIG. 2(a) shows the case where a hole is simply made in the frame 1, and the effective large diameter is d, = 8 to 101Wl. Figure 2 (b) shows a bell-shaped nozzle,
An effective nozzle inner diameter is 4 to IQ+ma. Figure 2 (
c) This is an example of a nozzle having a curve opposite to that of the hanging pupil, and an effective nozzle inner diameter of 4 to 10 degrees is similar to the bell-shaped nozzle.

(G) Effects of the Invention As described above, the present invention is as follows:- Since high-pressure air is instantaneously injected from the frame constituting the filter body into the inside of the bag-like fabric filtration member, dust is removed. Since the work can be done easily and quickly, not only does cleaning work not reduce temporary operating efficiency, but also the configuration required for cleaning work is extremely simple and streamlined, making it easy to use both in terms of configuration and operation. This can save labor.

[Brief explanation of drawings]

Figure 1 shows an example of the structure of the filter body according to the present invention. Figure 2 (A) is an explanatory diagram when the kiln is simply opened in the frame.
B) → is an explanatory diagram when a nozzle with a different shape is installed. FIG. 3 is a configuration diagram showing an example of the installation piping state. FIG. 4 is an explanatory diagram of the operation of a diaphragm valve and a pilot solenoid valve that generate an impulsive pulse air pressure. FIG. 5 is a perspective view showing an embodiment in which a plurality of filter bodies are washed at the same time. ￥ 5 items

Claims (2)

[Claims] (1) In a bag filter type dust collector, a flat bar is attached to the open side and the opposite side of the frame of the filter body made by bending a tube, and multiple springs are stretched between the flat bars, and one end of the frame is used for filtering. The body is closed and fixed with a fixing plate, and a plurality of holes are bored in the clean air side of the frame on the other end to form an air injection part, and the open end passes through the fixing plate to supply pulse air pressure. 1. A bag-like fabric filtration member cleaning device, characterized in that it is constructed by attaching the device. (2) The bag-like fabric filtration member cleaning device according to claim (1), wherein the air jet diameter of the air jet section is 4 to 10 mm.