JPH0810545A - Fire prevention device for dust collector - Google Patents

Abstract

PURPOSE:To prevent a fire from being enlarged by preventing 9 the spread of fire into a dust box and to help fire extinguishing to prevent the spread of the fire to the outside, when the fire is generated in the inside of a dust collector. CONSTITUTION:Dampers 12, 10 are provided on a sucking port 1 provided on a machine body 1 of the dust collector and on a discharge port 9, and a rotary shutter 15T is provided in a hopper 13 provided on the upper side part of a dust box 1K, and the dampers 12, 10 and the shutter 15T are rotated to close when temp. sensors S1, S2 provided in a dust collection room 2B detect a setting temp. (fire temp.).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used in the technical field of a dust collector for filtering dust-containing air sucked by a suction action by rotation of a fan with a filter, and more specifically, it is generated in the dust collector. The present invention relates to a fire preventive device for a dust collector, which is devised so as to minimize a fire accident and its damage.

[0002]

2. Description of the Related Art Since dust collectors for collecting inflammable dust are always exposed to the risk of fire, for example, Japanese Patent Application No. 62-28320 (Japanese Utility Model Application Laid-Open No. 63-136723).
No.) has been taken.

That is, in the case of the above conventional dust collector, dampers are attached to the suction port and the exhaust port of the dust collector, a gas fire extinguisher is attached to the inside of the casing (dust collection chamber), and a sensor attached to the suction port is used for the ignition. When it detects that, the dampers of the intake port and the exhaust port are closed, and together, the gas fire extinguisher supplies an incombustible gas to the inside of the casing to extinguish the fire, and a fire prevention device configured to prevent the spread of fire. Had been used.

[0004]

However, the place where the largest amount of combustible material (dust) is accumulated inside the dust collector is the part of the dust box provided under the inside of the casing, and a fire occurs. It is sometimes said that protecting this part from a fire is the most important point to prevent the spread of fire to the outside, but in the case of the above conventional dust collector, the intake port and the exhaust port are closed with dampers, and the inside of the casing is also closed. It is configured to supply non-combustible gas to extinguish fire, and since no fire protection measures have been taken in the part of the dust box where combustion must be prevented quickly, the combustible dust collected in this dust box However, there was a problem that the fire became bigger and the fire became larger, and it took time and effort to extinguish the fire, or the fire spread to the outside.

Therefore, a technical problem of the present invention is that when a fire occurs inside the dust collector, it prevents the fire from burning inside the dust box to prevent the fire from becoming large, and prevents the spread of fire to the outside to accelerate the extinguishing of the fire. That is.

[0006]

[Means for Solving the Problems] Means taken in the present invention for solving the above technical problems are as follows.

In accordance with the rotation of the fan, the dust-containing air is sucked into the body through the suction port and filtered by the filter, and the filtered clean air is discharged through the exhaust port, while the dust adhering to the filter is drawn to the inner bottom of the body. In a dust collector configured to be brushed off in a freely provided dust box,

(1) Dampers are attached to the inside of the suction port and the inside of the exhaust port, respectively, and a shutter is attached on the internal passage of a hopper provided on the upper side of the dust box. The temperature sensor installed in the unit should be configured to close when it detects the set temperature.

(2) The shutter mounted on the internal passage of the hopper is composed of a plurality of shutter blades which are opened and closed by pivoting about a mounting shaft in accordance with the reciprocating motion of one operating arm.

(3) A solenoid is used as a drive source for an operating arm that pivots and opens and closes a plurality of shutter blades. When this solenoid is turned on, the operating arm is moved forward to open each shutter blade and the solenoid is turned off. Then, the actuating arm is returned by the pulling force of the spring, and the shutter blades are closed and rotated.

[0011]

Each of the means described in (1), (2) and (3) above operates as follows.

According to the means described in the above (1), when a temperature sensor provided inside the body detects a set temperature due to the occurrence of a fire, dampers provided at the intake port and the exhaust port are closed to operate the inside of the body. Since it keeps air from entering and exiting, it is possible to prevent the spread of fire first, and at the same time, since the shutter is closed to close the internal passage of the hopper, it is possible to prevent burning in the dust box. Because it can be done, the burning time of dust is shortened to extinguish fire quickly,
It is possible to prevent the spread of fire to the outside.

According to the means described in the above (2), since the swivel shutter which swivels and opens and closes a plurality of shutter blades is used as the shutter provided on the internal passage of the hopper, the installation space is small and narrow. It can be easily attached to the internal passage of the hopper, and also, because it does not get injured by being caught in hands or fingers, it makes it possible to eliminate the risk of maintenance.

According to the means described in (3) above, since the shutter is always open when the dust collector is operating, that is, when the solenoid is ON, the dust that has been blown off is stored inside the dust box. However, when the operation of the dust collector is stopped due to a power failure due to a fire, that is, when the solenoid is turned off, the spring always rotates to close the shutter. The shutter of the hopper is surely closed at the time of occurrence of, and it is possible to surely prevent the burning of dust accumulated in the dust box.

As described above, the above-mentioned technical problems can be solved by the above-mentioned means, and the problems of the conventional art can be solved.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the above-described fire preventive device for a dust collector according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 and FIG. 2 are cross-sectional views of a dust collector equipped with a fire protection device according to the present invention during normal operation and during a fire, respectively. Then, the inside of the machine body generally indicated by reference numeral 1 is divided into two upper and lower chambers by a horizontal mounting plate 2, that is, a cleaning chamber 2A and a dust collecting chamber 2B, and a fan 8 rotated by a motor 8M on the cleaning chamber 2A side. A fan chamber 7 containing the fan 8, a partition plate 6 for partitioning the fan chamber 7 and the clean room 2A, and compressed air for duster removal sent through the diaphragm valve 5 from the injection port 4a. Is provided with a blow tube 4 for injecting into the inside, and a communication hole 6a for communicating the clean chamber 2A and the fan chamber 7 is opened in the center of the partition plate 6, and the fan chamber 7 has a duct shape. Inlet 9 of the created exhaust port 9 There has been opened.

Further, a dust collecting filter 3 ... Is attached to the dust collecting chamber 2B in a state of being suspended from the mounting plate 2 and a suction port 11 of a dust suction duct is opened at one side thereof. At the same time, a dust box 1K that collects the dust DS that has been blown off from each filter 3 by compressed air injected from the dust removal blow tube 4 or that has fallen due to its own weight after inflow is stored in the inner bottom portion in a freely drawable manner. Further, a hopper 13 for guiding the fall of the dust DS is provided on the upper side of the dust box 1K.

The fire preventive device for a dust collector according to the present invention is implemented in the dust collector with a dust removing function having the above-described structure. In FIGS. 1 and 2 described above, 10 and 12 are the exhaust gas described above. Dampers 10T and 12T provided on the internal passages of the port 9 and the suction port 11 are opening and closing means for opening and closing the dampers 10 and 12, and each opening and closing means is a cylinder or solenoid using hydraulic or compressed air. Alternatively, when the temperature sensors S1 and S2, which are configured by using a motor or the like and are installed inside the dust collecting chamber 2B, detect a set temperature, that is, an abnormal temperature due to a fire, these opening / closing means 1 are provided.
The 0T and 12T are actuated to rotate the dampers 10 and 12 to the closed state as shown in FIG. 2 to close both the exhaust port 9 and the suction port 11.

The above-mentioned FIGS. 1 and 2 and FIG.
In FIG. 5, reference numeral 15T indicates a swivel shutter, which is rotatably mounted on the internal passage 13a of the hopper 13 described above.
A plurality of shutter blades 15 ...
The swivel shutter 15T, which is constructed by being mounted side by side so as to be openable and closable by using, ..., Is configured to be integrally opened and closed by a link type actuating mechanism ST as shown in FIGS. 3 to 5. There is.

That is, in the drawing, 16 ... Actuator arms 17 each have one end fixed to the above-mentioned mounting shaft 14 while being inclined at a predetermined angle, and the other end formed laterally long using the connecting shafts 16a.
The reference numeral 18 designates a rotary lever which is rotatably attached to the robot, and the reference numeral 18 designates the upper and lower ends of the solenoid 20T fixed to the body 1 side and the root end of the operating arm 17 using connecting pins 17a and 18a, respectively. A rotating arm rotatably connected to the actuator 20a, 19 is a support shaft for rotatably supporting an intermediate portion of the rotating arm 18, and 21 is a support shaft for rotating the arm 18 when the solenoid 20T is turned off. As shown in FIG. 4, a spring 22 for pulling and rotating the shutter blades 15 ...

Link type actuating mechanism ST constructed as described above
According to FIG. 1, when the solenoid 20T is ON,
As shown in FIGS. 3 and 5, when the shutter blades 15 are rotated by the suction operation of the actuator 20a so that the solenoid 20T is turned off, the spring 21 is released.
Is configured to rotate each shutter blade 15 ... In a closed state as shown in FIGS. 2 and 4, and the solenoid 2
0T maintains the ON state when the dust collector is operating,
When the temperature sensors S1 and S2 described above detect a fire temperature, or when the operation of the dust collector is stopped due to a power failure due to a fire, or when the power switch is turned off, the mechanism is automatically turned off. There is.

The solenoid 20T described above is an embodiment of the shutter opening / closing means 20, and the other shutter opening / closing means 20 may be, for example, a cylinder or a motor using hydraulic pressure or compressed air.

FIG. 6 is a block diagram showing the electrical construction of the present invention, in which the fan motor 8 described above is added to the control section CST provided in the control box CS shown in FIGS. 1 and 2.
M, temperature sensors S1 and S2, damper opening / closing means 10T and 12T including solenoids, and the same solenoid 2
When the shutter opening / closing means 20 composed of 0T or the like is connected, and further, the alarm lamp 23 as shown in FIGS. 1 and 2 is also connected, and when the temperature sensors S1 and S2 detect the set temperature (fire temperature), control is performed. Part CST is the fan motor 8 first
The rotation of M is stopped, and then the damper opening / closing means 10T,
12T is controlled to rotate the dampers 10 and 12 in a closed manner, and further, the shutter opening / closing means 20 is turned off to rotate the spring 2
When the shutter 15T is closed and rotated by 1, the warning light 23 is turned on to notify the occurrence of a fire.

In the above-described embodiment, the dampers 10 and 12 are used.
Both the shutter and the shutter 15T are connected to the respective opening / closing means 10T, 12T
It is designed to automatically open and close each by 20. However, if it is configured so that it can be freely opened and closed manually by switching a switch (not shown), it can be used for emergency or maintenance. It is possible to quickly open and close each of the dampers 10 and 12 and the shutter 15T manually.

Since the fire protection device for the dust collector according to the present invention has the structure as described above, when the temperature sensors S1 and S2 detect an abnormal temperature due to the occurrence of a fire, the dampers 10 and 12 of the exhaust port 9 and the suction port 11 are promptly detected. Since the shutter 15T of the hopper 13 is also closed at the same time, the inside of the machine is made oxygen-free to prevent the spread of the fire, and at the same time, the fire spreads to the dust DS in the most dangerous dust box 1K. To prevent this, if the dust box 1K is quickly pulled out of the machine body 1 during this period, the fire can be minimized to prevent the spread of fire to the outside and accelerate the extinguishing of the fire.

Further, since the shutter 15T for protecting the dust box 1K adopts a swivel system in which the shutter blades 15 ... Are rotated around the mounting shafts 14 to open and close, the shutter 15T can be easily mounted even in the narrow internal space of the hopper 13. In addition, since it is a turning method, there is no danger of being injured by putting a hand or fingers in the maintenance, and the work can be safely carried out.

Further in accordance with the present invention, each shutter blade 15
The solenoid 20T is used as a drive source for opening and closing
If the shutter blades 15 ... Are automatically closed and rotated by the pulling force of the spring 21 when the solenoid 20T is turned off due to a power failure or the like, the dust collector may be cut off due to a fire, or the operation may be stopped. Even if the control unit CST fails due to a fire, the shutter blades 15 can be reliably closed and rotated to protect the dust box 1K from a fire.

[0029]

EFFECTS OF THE INVENTION Since the fire protection device for a dust collector according to the present invention is as described above, even if a fire occurs in the body during the dust collection operation, the spread of the fire can be suppressed as much as possible.
It is possible to prevent the spread of fire to the outside and to exhibit the safety of extinguishing the fire within a short time, and to minimize the damage caused by the fire.

[Brief description of drawings]

FIG. 1 is a front sectional view showing a state of a dust collector provided with a fire protection device according to the present invention during normal operation.

FIG. 2 is a front sectional view showing a state of a dust collector equipped with a fire protection device according to the present invention when a fire occurs.

FIG. 3 is a front configuration diagram of a link type actuation mechanism showing a state where a shutter is opened.

FIG. 4 is a front configuration diagram of the link type actuation mechanism showing a state in which a shutter is closed.

FIG. 5 is a perspective view of the link-type actuating mechanism similarly showing a state in which the shutter is open.

FIG. 6 is a block diagram showing an electrical configuration of the present invention.

[Explanation of symbols]

 1 Aircraft 2B Dust collection chamber 3 Filter 4 Dust removal blow tube 8 Fan 9 Exhaust port 10 Damper 10T opening / closing means 11 Suction port 12 Damper 12T Opening / closing means 13 Hopper 13a Internal passage 14 Mounting shaft 15T Shutter 15 Shutter blade 17 Working arm 20T Solenoid 20 Opening / closing means 21 Spring ST link type operating mechanism 1K dust box DS dust

Claims (3)

[Claims] 1. Dust-containing air is sucked into the airframe through a suction port according to the rotation of a fan, filtered by a filter, and filtered clean air is discharged from an exhaust port, while dust adhering to the filter is removed from the inner bottom portion of the airframe. In a dust collector configured to be blown off to a dust box that can be pulled out freely, dampers are attached to the inside of the suction port and the inside of the exhaust port, respectively, and a shutter is installed on the internal passage of a hopper provided above the dust box. A fireproof device for a dust collector, characterized in that the damper and the shutter are configured to be closed when a temperature sensor provided inside the body detects a set temperature. 2. A shutter mounted on an internal passage of a hopper is constituted by a plurality of shutter blades which are pivoted about a mounting shaft and opened / closed in accordance with the reciprocating motion of one operating arm. 1. A fire protection device for a dust collector according to 1. 3. A solenoid is used as a drive source for an operating arm that pivots a plurality of shutter blades to open and close. On the other hand, when the solenoid is turned on, the operating arm is moved forward to open each shutter blade and the solenoid is turned off. 3. The fire protection device for a dust collector according to claim 2, wherein the actuating arm is moved back by the pulling force of the spring to close and rotate each shutter blade.