JP2011201664A - Fire-extinguishing system for refuse collecting vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fire-extinguishing system which allows the concentration of fire-extinguishing gas to reach the flame extinction concentration as rapidly as possible over the entire area in a refuse storage box, and maintains the state for the predetermined time.SOLUTION: The fire-extinguishing system A includes two vessels, i.e., a first high-pressure gas vessel 3A and a second high-pressure gas vessel 3B in which carbon dioxide as fire-extinguishing gas is sealed at high pressure, a first release mechanism 4A and a second release mechanism 4B which are respectively provided on the first and second high-pressure gas vessels 3A, 3B, a first flow regulating valve 6A and a second flow regulating valve 6B connected to the first and second release mechanisms 4A, 4B via a first filter 5A and a second filter 5B, a nozzle pipe 7 merging pipes from the first and second flow regulating valves 6A, 6B, a gas release nozzle 8 connected to the nozzle pipe 7, and a control panel 9 for controlling the operations of the first and second release mechanisms 4A, 4B.

Description

  The present invention relates to a fire extinguishing apparatus that extinguishes or suppresses a fire generated in a dust storage box of a garbage collection vehicle.

  The refuse collection vehicle is mainly composed of a vehicle body, a dust storage box mounted on the vehicle body, a dust input box attached to the rear opening of the dust storage box, and a dust loading device installed inside the dust input box. The dust thrown into the dust throwing box is configured to be pushed into the dust containing box and accommodated by the dust loading device. As is well known, the dust loading device includes a rotary type including a swingable pusher plate and a rotatable rotary plate located below the pusher plate, a packer plate that can be raised and lowered, and the packer. There is a press type that includes a press plate that is swingably provided at the lower end of the plate.

  In addition to combustible materials such as paper and plastic, waste collected by garbage trucks may contain flammable materials such as lighters and flammable gas cylinders. In many cases, fires occur due to the effects of compression or friction of the fire. The degree of difficulty in extinguishing and suppressing the expansion of a fire in the dust container varies depending on the loading situation of the dust at the time of the fire, and there is an empty space in the dust container and there is sufficient air. When a fire occurs, the fire spreads quickly and is difficult to extinguish. In particular, in a garbage truck equipped with a rotary loading device, if the loading rate of dust in the garbage storage box is less than 100%, an empty space is created in the upper part of the dust storage box. There is a tendency to fall into.

  As a means for extinguishing or suppressing the fire of the garbage collection vehicle as described above, the following Patent Document 1 discloses a gas discharge nozzle disposed on a ceiling portion on the rear side (a dust input box side) in a dust container, and a vehicle body. Two mounted fire extinguishing pressure gas containers are connected with a connecting pipe, and the fire extinguishing gas (carbon dioxide gas, etc.) from one specific fire extinguishing pressure gas container is sent from the gas discharge nozzle to the rear part of the garbage storage box. In the case that the specific one fire extinguishing pressure gas container does not make it in time, the fire extinguishing from another fire extinguishing pressure gas container at the same time as the preset time elapses. A fire extinguishing and combustion suppressing system is disclosed in which a gas is continuously radiated from a gas discharge nozzle to a rear portion in a dust storage box. This minimizes the spread of fire in the dust container with the minimum amount of fire extinguishing gas, and in the meantime, move the dust collection truck to a safe place and then use a fire truck or fire hydrant for full-fledged and sufficient fire extinguishing. Activities can be carried out to minimize the burning of the garbage truck itself.

JP 2008-284194 A

  When extinguishing or suppressing a fire in the dust storage box using a gas-based fire extinguishing agent, the concentration of the fire extinguishing gas is increased as quickly as possible to a predetermined flame extinction concentration over the entire area of the dust storage box, and It is important to maintain the flame extinguishing concentration for a certain time. However, in the fire-extinguishing combustion suppression system described in Patent Document 1, a fire-extinguishing gas is radiated into the dust container from a gas discharge nozzle disposed on the rear ceiling in the dust container, and a gas supply position ( Since the rear part of the dust storage box is close to the dust input box and has low airtightness, there is a problem that part of the emitted fire extinguishing gas flows out from the gap of the dust input box and is not effectively used for extinguishing. Moreover, since the fire-extinguishing gas is radiated into the dust container at a constant flow rate, it takes time until the concentration of the fire-extinguishing gas reaches the flame extinguishing concentration over the entire area of the dust container, especially in front of the dust container. There is also a problem that the fire extinguishing or suppressing effect of the fire generated in the section is not sufficient.

  In view of the above problems, the present invention can make the concentration of the fire-extinguishing gas reach the flame-extinguishing concentration as quickly as possible over the entire area of the dust container, and maintain the state for a certain period of time. It is an object of the present invention to provide a fire extinguisher that can be used.

  In order to solve the above problems, the present invention provides a dust container including a dust container, a dust container box attached to a rear opening of the dust container box, and a dust loading device installed in the dust container box. In a fire extinguishing apparatus for a collection vehicle, a high-pressure gas container filled with a fire-extinguishing gas, an opening mechanism provided in the high-pressure gas container, a flow rate adjusting mechanism connected to a downstream side of the opening mechanism, and a nozzle pipe in the flow adjusting mechanism And a gas emission nozzle installed in the upper front part of the garbage storage box, and the flow rate adjustment mechanism is configured to relatively reduce the fire-extinguishing gas released from the high-pressure gas container opened by the operation of the opening mechanism. The first state of flowing at a large flow rate and the second state of flowing at a relatively small flow rate, and from the start of operation of the opening mechanism to a predetermined time, the first state of the flow rate adjusting mechanism causes a high pressure. Fire extinguishing gas from the gas container After passing through the gas radiation nozzle at a flow rate and radiating it into the dust storage box, after reaching a predetermined time, the second state of the flow rate adjustment mechanism causes the fire extinguishing gas from the high-pressure gas container to flow into the gas radiation nozzle at a small flow rate. Provided is a structure that circulates and radiates in a dust storage box. Here, carbon dioxide gas, nitrogen gas, argon gas, or the like can be used as the fire extinguishing gas, but carbon dioxide gas is preferred.

  In the above configuration, two high-pressure gas containers each provided with an opening mechanism are provided, and the flow rate adjusting mechanism is connected to the downstream side of the opening mechanism of one high-pressure gas container and is extinguished from one high-pressure gas container. Connected to the downstream side of the first high-pressure gas container and the opening mechanism of the other high-pressure gas container, and the fire-extinguishing gas released from the other high-pressure gas container is relatively small A second flow rate adjustment valve that circulates at a flow rate, and simultaneously operates the opening mechanism of the two high-pressure gas containers, and extinguishes gas from the two high-pressure gas containers via the first and second flow rate adjustment valves. After the discharge of the fire-extinguishing gas from one high-pressure gas container is completed, the fire-extinguishing gas from the other high-pressure gas container is reduced to a small flow rate via the second flow control valve. With a configuration that circulates to the gas radiation nozzle Rukoto can.

  Further, in the above configuration, the apparatus includes one high-pressure gas container provided with an opening mechanism, and the flow rate adjusting mechanism is branched and connected to the switching valve connected to the downstream side of the opening mechanism of the high-pressure gas container, The opening mechanism has a first flow rate adjustment valve that allows a fire-extinguishing gas discharged from the high-pressure gas container to flow at a relatively large flow rate and a second flow rate adjustment valve that allows a relatively small flow rate to flow. From time to time, the switching valve causes the fire extinguishing gas from the high-pressure gas container to flow through the first flow rate adjusting valve to the gas radiation nozzle at a large flow rate. When the predetermined time is reached, the switching valve is switched. Thus, the fire-extinguishing gas from the high-pressure gas container may be circulated to the gas radiation nozzle at a small flow rate via the second flow rate adjustment valve.

  Further, in the above configuration, the apparatus includes one high-pressure gas container provided with an opening mechanism, and the flow rate adjusting mechanism is connected to the downstream side of the opening mechanism of the high-pressure gas container and discharges the fire-extinguishing gas discharged from the high-pressure gas container. A first flow rate adjusting valve that circulates at a relatively large flow rate, a switching valve connected downstream of the first flow rate adjusting valve, and a fire extinguishing unit that is branched and connected to the switching valve and flows through the first flow rate adjusting valve It has a second flow rate adjustment valve that circulates gas at a relatively small flow rate, and a branch pipe part that circulates gas at the same large flow rate as the first flow rate adjustment valve. The switching valve causes the fire-extinguishing gas flowing through the first flow rate adjusting valve to flow through the branch pipe portion to the gas radiation nozzle at a large flow rate, and when a predetermined time is reached, the switching valve is switched to switch the high-pressure gas. Fire extinguishing from the container via the first flow control valve Gas through the second flow control valve may be configured to distribute the gas emission nozzle at a low flow rate.

  In the above configuration, a switching time setting device may be further provided, and the switching valve may be switched when the elapsed time from the start of the operation of the opening mechanism reaches the switching setting time set by the switching time setting device. .

  INDUSTRIAL APPLICABILITY The present invention is suitable for a fire extinguishing device for a garbage collection vehicle including a rotary dust loading device including a swingable pushing plate and a rotatable rotating plate located below the pushing plate.

  According to the present invention, the fire extinguishing gas can reach the fire extinguishing concentration as quickly as possible over the entire area of the dust storage box and can maintain the state for a certain period of time. An apparatus can be provided.

It is a figure which shows typically the refuse storage box attached to the dust storage box and its rear opening part of the refuse collection vehicle which concerns on embodiment so that opening and closing is possible. It is a circuit diagram of the fire extinguishing apparatus which concerns on embodiment. It is a circuit diagram of the fire extinguishing apparatus which concerns on other embodiment. It is a circuit diagram of the fire extinguishing apparatus which concerns on other embodiment. It is a figure which shows a simulation result. It is a figure which shows a simulation result. It is a figure which shows a simulation result.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 schematically shows a dust storage box 1 of a garbage collection vehicle according to an embodiment and a dust input box 2 attached to the rear opening of the garbage collection box 2 so as to be freely opened and closed. The refuse storage box 1 is disposed in a vehicle body frame (not shown), and a cab is disposed in front of the dust storage box 1. A dust loading device (not shown) is provided inside the dust throwing box 2. In this embodiment, the dust loading device includes a swingable pushing plate and a rotation located below the pushing plate. A rotary dust loading device provided with a free rotating plate. The dust G thrown into the dust throwing box 2 is pushed into the dust box 1 and stored by the dust loading device. In addition, one or a plurality of gas radiation nozzles 8 constituting the fire extinguishing apparatus A are installed in the upper part (ceiling part) in the front (operator cab side) of the dust container box 1.

  As shown in FIG. 2, in this embodiment, the fire extinguishing apparatus A includes two first high-pressure containers 3A and 2B in which carbon dioxide as a fire-extinguishing gas is sealed at high pressure, The first opening mechanism 4A and the second opening mechanism 4B provided in the second high-pressure gas containers 3A and 3B, respectively, and the first and second opening mechanisms 4A and 4B through the first filter 5A and the second filter 5B, respectively. The first flow rate adjusting valve 6A and the second flow rate adjusting valve 6B connected, the nozzle pipe 7 joining the pipes from the first and second flow rate adjusting valves 6A and 6B, and the gas connected to the nozzle pipe 7 A radiation nozzle 8 and a control panel 9 for controlling the operation of the first and second opening mechanisms 4A and 4B are provided. In this embodiment, the flow rate adjusting mechanism 6 is configured by the first flow rate adjusting valve 6A and the second flow rate adjusting valve 6B.

  The first and second opening mechanisms 4A and 4B operate when a start signal is input from the control panel 9 to open the first and second high-pressure gas containers 3A and 3B, and the first and second high-pressure gas containers Carbon dioxide gas is released from 3A and 3B. The first and second flow rate adjustment valves 6A and 6B have different flow rate setting values, the flow rate set value of the first flow rate adjustment valve 6A is relatively large (large flow rate value setting), and the second The flow rate setting value of the flow rate adjusting valve 6B is relatively small (small flow rate value setting). For example, a flow restrictor having a relatively large orifice diameter can be used as the first flow rate adjusting valve 6A, and a flow restrictor having a relatively small orifice diameter can be used as the second flow rate adjusting valve 6B.

  For example, when an operator detects a fire in the refuse storage box 1 and presses the start button of the control panel 9, a start signal is output from the control panel 9 to the first and second opening mechanisms 4A and 4B. The first and second opening mechanisms 4A and 4B are operated simultaneously. Thereby, the first and second high-pressure gas containers 3A and 3B are simultaneously opened, and carbon dioxide gas is released from the first and second high-pressure gas containers 3A and 3B. Carbon dioxide gas released from the first and second high-pressure gas containers 3A and 3B is nozzle piping from the first filter 5A through the first flow rate adjustment valve 6A and from the second filter 5B through the second flow rate adjustment valve 6B, respectively. 7, flows through the nozzle pipe 7, and radiates downward from the gas radiation nozzle 8 to the front upper space in the dust container 1. On the other hand, as described above, since the first and second flow rate adjusting valves 6A and 6B have different flow rate setting values, the elapsed time from the start of operation of the first and second release mechanisms 4A and 4B is a predetermined time. , The carbon dioxide gas in the first high-pressure gas container 3A set to the large flow rate value by the first flow rate adjusting valve 6A is exhausted first, and thereafter the small flow rate value is set by the second flow rate adjusting valve 6A. Only the carbon dioxide gas in the second high-pressure gas container 3B set to be radiated from the gas radiation nozzle 8. Accordingly, from the start of activation of the fire extinguishing apparatus A (when the first and second opening mechanisms 4A and 4B start operation) to a predetermined time, the gas radiation nozzle 8 is supplied from both the first and second high-pressure gas containers 3A and 3B. Carbon dioxide gas is supplied and radiated into the dust storage box 1 at a large flow rate, and after a predetermined time has elapsed, carbon dioxide gas is supplied from only the second high-pressure gas container 3B to the gas radiation nozzle 8 to accommodate the dust at a small flow rate. Radiated into the box 1.

  In this way, the configuration is such that carbon dioxide gas (fire-extinguishing gas) is radiated from the gas radiation nozzle 8 to the front upper space in the refuse storage box 1, thereby radiating to the rear upper space with low airtightness. , The outflow of carbon dioxide gas to the outside is reduced, the carbon dioxide gas can be effectively used for extinguishing the flame, and the carbon dioxide gas is put in the garbage storage box 1 at a relatively large flow rate from the start of the extinguishing device A to a predetermined time. By radiating, the concentration of carbon dioxide gas can be quickly reached to the flame extinguishing concentration over the entire area of the dust container 1, and carbon dioxide gas is allowed to flow after a predetermined time has elapsed since the start of the extinguishing device A. By supplying the dust container 1 with a relatively small flow rate, the extinguishing concentration can be maintained for a certain time while suppressing the consumption of carbon dioxide gas. This effectively extinguishes a fire in the waste container with a relatively small amount of carbon dioxide gas, or effectively suppresses the expansion of the fire, and implements a full-scale fire extinguishing activity during that time. It is possible to minimize the burning of the collection vehicle itself.

  FIG. 3 shows a fire extinguishing apparatus B according to another embodiment. The fire extinguisher B of this embodiment includes a high pressure gas container 3 in which carbon dioxide as a fire extinguishing gas is sealed at a high pressure, an opening mechanism 4 provided in the high pressure gas container 3, and a filter 5 in the opening mechanism 4. A switching valve (three-way switching valve), for example, an electromagnetic switching valve (electromagnetic three-way switching valve) 6C, and a first flow rate adjusting valve 6A and a second flow rate adjusting valve 6B branched and connected to the electromagnetic switching valve 6C. A nozzle pipe 7 that merges the pipes from the first and second flow rate adjusting valves 6A and 6B, a gas radiation nozzle 8 connected to the nozzle pipe 7, and a control panel 9 that controls the operation of the opening mechanism 4. The switching time setting device 10 is provided.

  The opening mechanism 4 operates when a start signal is input from the control panel 9, opens the high-pressure gas container 3, and releases carbon dioxide gas from the high-pressure gas container 3. The carbon dioxide gas released from the high-pressure gas container 3 flows into the first flow rate adjustment valve 6A or the second flow rate adjustment valve 6B via the filter 5 and the electromagnetic switching valve 6C. The first and second flow rate adjustment valves 6A and 6B have different flow rate setting values, the flow rate set value of the first flow rate adjustment valve 6A is relatively large (large flow rate value setting), and the second The flow rate setting value of the flow rate adjusting valve 6B is relatively small (small flow rate value setting). The switching of the electromagnetic switching valve 6C is performed by outputting a switching signal from the control panel 9 to the electromagnetic switching valve 6C, and the time for outputting the switching signal from the control panel 9 to the electromagnetic switching valve 6C is set by the switching time setting device 10. can do. For example, at the initial start of the fire extinguisher A (when no switching signal is input from the control panel 9), the electromagnetic switching valve 6C is held at a position communicating with the first flow rate adjusting valve 6A, and when the fire extinguisher A starts to start ( When the elapsed time since the start of the opening mechanism 4 reaches the switching time set by the switching time setting device 10, a switching signal is input from the control panel 9 to the electromagnetic switching valve 6C, and the electromagnetic switching valve 6C is turned on. The position is switched to a position communicating with the second flow rate adjustment valve 6B. In this embodiment, the flow rate adjusting mechanism 6 is configured by the first flow rate adjusting valve 6A, the second flow rate adjusting valve 6B, and the electromagnetic switching valve 6C.

  For example, when the worker senses the occurrence of a fire in the refuse storage box 1, based on the relationship data between the load amount of the dust displayed on the monitor screen of the cab and the switching time of the electromagnetic switching valve 6C (the dust The optimum switching time of the electromagnetic switching valve 6C is obtained in advance by experiments or the like according to the loading amount, and the relationship is displayed in a graph or table.) After the switching time is set by the switching time setting device 10, the control is performed. Press the start button on the board 9. As a result, an activation signal is output from the control panel 9 to the opening mechanism 4, the opening mechanism 4 is operated, the high pressure gas container 3 is opened, and carbon dioxide gas is released from the high pressure gas container 3. At the same time, the switching time setter 10 is activated to accumulate the elapsed time from the start of activation. Since the electromagnetic switching valve 6C is held at a position communicating with the first flow rate adjusting valve 6A from the start of activation until the switching set time is reached, the carbon dioxide gas released from the high pressure gas container 3 is filtered by the filter 5. Then, it flows into the nozzle pipe 7 via the electromagnetic switching valve 6C and the first flow rate adjusting valve 6A, circulates through the nozzle pipe 7, and is radiated downward from the gas radiation nozzle 8 to the front upper space in the dust container box 1. When the elapsed time from the start of starting reaches the switching set time set in the switching time setter 10, a switching signal is input from the control panel 9 to the electromagnetic switching valve 6C, and the electromagnetic switching valve 6C is set to the second flow rate. The carbon dioxide gas released from the high-pressure gas container 3 is switched to a position communicating with the regulating valve 6B and flows into the nozzle pipe 7 from the filter 5 via the electromagnetic switching valve 6C and the second flow rate regulating valve 6B. 7 is radiated from the gas radiation nozzle 8 to the front upper space in the dust container 1.

  The fire extinguisher B according to this embodiment has the same effects as the fire extinguisher A according to the above-described embodiment. In addition, since the single high-pressure gas container 3 is provided, the overall structure is lighter and more compact than the fire extinguisher A. In addition, there is an advantage that the switching time between the large flow rate radiation and the small flow rate radiation of the fire extinguishing gas (carbon dioxide gas) can be optimally set according to the load amount of the dust.

  FIG. 4 shows a fire extinguishing apparatus C according to another embodiment. The fire extinguisher C of this embodiment includes a high pressure gas container 3 in which carbon dioxide as a fire extinguishing gas is sealed at a high pressure, an opening mechanism 4 provided in the high pressure gas container 3, and a filter 5 in the opening mechanism 4. The first flow rate adjusting valve 6A connected via the first flow rate adjusting valve 6C, the electromagnetic switching valve 6C connected to the downstream side of the first flow rate adjusting valve 6A, the branch pipe portion 6D branchingly connected to the electromagnetic switching valve 6C, and the second flow rate. Controls the operation of the regulating valve 6B, the nozzle pipe 7 that joins the branch pipe section 6D and the pipe from the second flow regulating valve 6B, the gas radiation nozzle 8 connected to the nozzle pipe 7, and the opening mechanism 4. And a switching time setting device 10.

  The opening mechanism 4 operates when a start signal is input from the control panel 9, opens the high-pressure gas container 3, and releases carbon dioxide gas from the high-pressure gas container 3. The carbon dioxide gas released from the high-pressure gas container 3 flows into the electromagnetic switching valve 6C via the first flow rate adjusting valve 6A, and flows into the branch pipe section 6D or the second flow rate adjusting valve 6B via the electromagnetic switching valve 6C. To do. The first and second flow rate adjustment valves 6A and 6B have different flow rate setting values, the flow rate set value of the first flow rate adjustment valve 6A is relatively large (large flow rate value setting), and the second The flow rate setting value of the flow rate adjusting valve 6B is relatively small (small flow rate value setting). The switching of the electromagnetic switching valve 6C is performed by outputting a switching signal from the control panel 9 to the electromagnetic switching valve 6C, and the time for outputting the switching signal from the control panel 9 to the electromagnetic switching valve 6C is set by the switching time setting device 10. can do. For example, at the initial start-up time of the fire extinguisher A (when no switching signal is input from the control panel 9), the electromagnetic switching valve 6C is held at a position communicating with the branch pipe portion 6D, and the elapsed time from the start of the start-up is the switching time. When the switching set time set in the setting device 10 is reached, a switching signal is inputted from the control panel 9 to the electromagnetic switching valve 6C, and the electromagnetic switching valve 6C is switched to a position where it is communicated with the second flow rate adjusting valve 6B.

  For example, when the worker senses the occurrence of a fire in the refuse storage box 1, based on the relationship data between the load amount of the dust displayed on the monitor screen of the cab and the switching time of the electromagnetic switching valve 6C (the dust The optimum switching time of the electromagnetic switching valve 6C according to the loading amount is obtained in advance by experiments or the like, and the relationship is displayed in a graph or table). After the switching time is set by the switching time setter 10, the control panel Press the 9 start button. As a result, an activation signal is output from the control panel 9 to the opening mechanism 4, the opening mechanism 4 is operated, the high pressure gas container 3 is opened, and carbon dioxide gas is released from the high pressure gas container 3. At the same time, the switching time setter 10 is activated and the time from the start of activation is accumulated. Since the electromagnetic switching valve 6C is held at a position communicating with the branch pipe section 6D from the start of activation until the switching set time is reached, the carbon dioxide gas released from the high-pressure gas container 3 is passed through the filter 5 1 It flows into the nozzle pipe 7 through the flow rate adjusting valve 6A, the electromagnetic switching valve 6C and the branch pipe section 6D, circulates through the nozzle pipe 7, and is radiated from the gas radiation nozzle 8 to the front upper space in the dust container box 1. . When the elapsed time from the start of starting reaches the switching set time set in the switching time setter 10, a switching signal is input from the control panel 9 to the electromagnetic switching valve 6C, and the electromagnetic switching valve 6C is set to the second flow rate. The carbon dioxide gas released from the high-pressure gas container 3 is switched to a position communicating with the regulating valve 6B, and the nozzle pipe is supplied from the filter 5 via the first flow regulating valve 6A, the electromagnetic switching valve 6C and the second flow regulating valve 6B. 7, flows through the nozzle pipe 7, and is radiated from the gas radiation nozzle 8 to the front upper space in the dust container 1.

  The fire extinguisher C of this embodiment has the same effect as the fire extinguisher B of the embodiment described above, but the carbon dioxide gas released from the high pressure gas container 3 is electromagnetically switched 6C via the first flow rate adjusting valve 6A. Since the electromagnetic switching valve 6C can be operated at a lower pressure than the electromagnetic switching valve 6C of the fire extinguishing device B, the cost can be reduced.

  According to the experiment, the extinguishing concentration of carbon dioxide gas with respect to n-heptane is 22%, and in order to extinguish or suppress the fire generated in the dust storage box, the concentration of carbon dioxide gas is changed over the entire area of the dust storage box. It is important to increase the flame extinguishing concentration to 22% as quickly as possible and to maintain the flame extinguishing concentration of 22% or more for a certain period of time.

  FIGS. 5 to 7 simulate how the carbon dioxide gas concentration distribution in the dust container after a predetermined time elapses from the start of gas emission depending on the installation position of the gas emission nozzle and the emission mode of the carbon dioxide gas. Shows the results. The simulation result is obtained by dividing the inside of the refuse storage box into five regions, indicating the carbon dioxide concentration of each region by a numerical value, and displaying the concentration according to the concentration. Actually, the shading is displayed as the shading of the color, but in FIGS. 5 to 7, the shading is displayed with the density of black dots for convenience.

  FIG. 7 is a simulation result in the case where the gas radiation nozzle is installed at the upper rear part in the dust storage box, and carbon dioxide gas is emitted downward from the gas radiation nozzle with a constant flow rate. The radiation mode of the gas is the same as that of Patent Document 1 described above. As shown in the figure, even after 600 seconds from the start of radiation, the carbon dioxide concentration in the front region in the trash storage box still does not reach the flame extinguishing concentration of 22%, and there is an effect of extinguishing or suppressing fire in the front region. I understand that it is small.

  FIG. 6 shows a simulation result in the case where the gas emission nozzle is installed in the upper part of the dust storage box and emits carbon dioxide gas downward at a constant flow rate from the gas emission nozzle. As shown in the figure, the time when the carbon dioxide concentration in the entire area of the dust container reaches the extinguishing concentration of 22% is 230 seconds from the start of radiation, which is considerably improved compared to the configuration of FIG. The time to reach 22% is still considerably longer than within 1 minute of reaching the flame extinguishing concentration which is a standard for gas fire extinguishing devices.

  FIG. 5 shows a simulation result in the case where the gas radiation nozzle is installed in the upper part of the dust storage box and radiates carbon dioxide gas downward from the gas radiation nozzle by two-stage switching between a large flow rate and a small flow rate. That is, 50% of the amount of carbon dioxide stored in one high-pressure gas container is emitted in 1 minute, and the remaining 50% is uniformly emitted over the subsequent 9 minutes. As shown in the figure, the time when the carbon dioxide concentration in the entire area of the dust container reaches the flame extinction concentration of 22% is about 40 seconds from the start of radiation, which is greatly improved compared to the configuration of FIG. The time to reach the concentration of 22% can sufficiently achieve the flame extinguishing concentration reaching within 1 minute, which is a standard for the gas fire extinguishing apparatus. Further, even after the concentration of carbon dioxide gas reaches the extinguishing concentration of 22%, the concentration of the extinguishing concentration of 22% or more can be maintained until the end of radiation.

DESCRIPTION OF SYMBOLS 1 Dust storage box 2 Dust input box 3 High pressure gas container 3A First high pressure gas container 3B Second high pressure gas container 4 Opening mechanism 4A First opening mechanism 4B Second opening mechanism 6 Flow rate adjusting mechanism 6A First flow rate adjusting valve 6B Second Flow control valve 6C Solenoid switching valve 6D Branch piping section 7 Nozzle piping 8 Gas discharge nozzle 9 Control panel 10 Switching time setting device

Claims (6)

In a fire extinguishing device for a dust collector equipped with a dust storage box, a dust input box attached to a rear opening of the dust storage box, and a dust loading device installed inside the dust input box,
A high-pressure gas container filled with fire-extinguishing gas, an opening mechanism provided in the high-pressure gas container, a flow rate adjusting mechanism connected to the downstream side of the opening mechanism, and connected to the flow rate adjusting mechanism via a nozzle pipe And a gas radiation nozzle installed at the upper front in the dust storage box,
The flow rate adjusting mechanism includes a first state in which the fire extinguishing gas released from the high-pressure gas container opened by the operation of the opening mechanism is circulated at a relatively large flow rate, and a first state in which the fire extinguishing gas is circulated at a relatively small flow rate. Two states,
From the start of operation of the opening mechanism to a predetermined time, according to the first state of the flow rate adjusting mechanism, the fire extinguishing gas from the high-pressure gas container is circulated through the gas radiation nozzle at a large flow rate into the dust container. Radiate,
After reaching the predetermined time, by the second state of the flow rate adjusting mechanism, the fire extinguishing gas from the high pressure gas container is circulated through the gas radiation nozzle at a small flow rate and radiated into the dust container box. Characteristic fire extinguishing device for garbage truck. Two high-pressure gas containers each provided with the opening mechanism,
The flow rate adjusting mechanism is connected to the downstream side of the opening mechanism of one of the high pressure gas containers, and a first flow rate adjusting valve that causes the fire extinguishing gas discharged from the one high pressure gas container to flow at a relatively large flow rate. A second flow rate adjustment valve connected to the downstream side of the opening mechanism of the other high-pressure gas container and allowing the fire-extinguishing gas discharged from the other high-pressure gas container to flow at a relatively small flow rate,
The opening mechanisms of the two high-pressure gas containers are simultaneously operated, and the fire-extinguishing gas from the two high-pressure gas containers is circulated to the gas radiation nozzle at a large flow rate through the first and second flow rate regulating valves. ,
After the discharge of the fire-extinguishing gas from the one high-pressure gas container is completed, the fire-extinguishing gas from the other high-pressure gas container is circulated to the gas radiation nozzle at a small flow rate through the second flow rate adjusting valve. The fire extinguishing apparatus for a garbage truck according to claim 1. One high-pressure gas container provided with the opening mechanism;
The flow rate adjusting mechanism includes a switching valve connected to the downstream side of the opening mechanism of the high pressure gas container, and a fire extinguishing gas that is branched to the switching valve and discharged from the high pressure gas container. A first flow rate adjustment valve that circulates at a low flow rate, and a second flow rate adjustment valve that circulates at a relatively small flow rate,
From the start of operation of the opening mechanism to a predetermined time, the switching valve causes the fire extinguishing gas from the high-pressure gas container to flow through the first flow rate adjusting valve to the gas radiation nozzle at a high flow rate,
When the predetermined time is reached, by switching the switching valve, the fire-extinguishing gas from the high-pressure gas container is circulated to the gas radiation nozzle at a small flow rate through the second flow rate adjustment valve. A fire extinguishing device for a garbage truck according to claim 1. One high-pressure gas container provided with the opening mechanism;
The flow rate adjusting mechanism is connected to a downstream side of the opening mechanism of the high-pressure gas container, and a first flow rate adjusting valve that causes the fire-extinguishing gas discharged from the high-pressure gas container to flow at a relatively large flow rate, A switching valve connected to the downstream side of the flow rate adjusting valve, and a second flow rate adjustment branchingly connected to the switching valve and allowing the fire extinguishing gas flowing through the first flow rate adjusting valve to flow at a relatively small flow rate. A valve and a branch pipe part that circulates at the same large flow rate as the first flow rate adjustment valve,
From the start of operation of the opening mechanism to a predetermined time, the switching valve causes the fire extinguishing gas flowing through the first flow rate adjusting valve to flow through the branch pipe portion at a large flow rate to the gas radiation nozzle. ,
When the predetermined time is reached, by switching the switching valve, the gas for fire extinguishing flowing from the high-pressure gas container through the first flow rate adjustment valve is reduced at a small flow rate through the second flow rate adjustment valve. The fire extinguishing device for a garbage truck according to claim 1, wherein the fire fighting device is circulated through a radiation nozzle.   4. A switching time setting device is further provided, and the switching valve is switched when an elapsed time from the start of operation of the opening mechanism reaches a switching setting time set by the switching time setting device. Or the fire extinguishing apparatus of the garbage truck as described in 4.   6. The dust loading apparatus according to claim 1, wherein the dust loading apparatus is a rotary dust loading apparatus including a swingable pressing plate and a rotatable rotating plate positioned below the pressing plate. A fire extinguishing device for a garbage truck according to any one of the above.

Images