JP2011231702A - Device for cooling of exhaust system for fire truck - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow a device, which cools an exhaust system of a fire truck loaded with a pump for pressurizing and delivering water for fire fighting to be discharged, to be applied to a small fire truck and to cool the exhaust system sufficiently when the pump is driven.SOLUTION: The exhaust system cooling device for the fire truck is provided for cooling the exhaust system 4 connected to an engine 3 and reaching to a tail pipe 45 from an exhaust manifold 41. In the apparatus, a heat-resisting coating is coated on a surface from the exhaust manifold 41 to at least a muffler 44 in the exhaust system 4, and a cooling fan 5 for blowing cooling wind for the exhaust manifold 41 is attached near the exhaust manifold 41 of the exhaust system 4.

Description

  The present invention belongs to a technical field related to an apparatus for cooling an exhaust system (an exhaust path from an exhaust manifold to a tail pipe) of a fire engine equipped with a pump that pressurizes and discharges fire-fighting water to be discharged.

  In general, there are situations where the exhaust system of a fire engine is not equipped with a special cooling means.

  Fire engine engines are usually installed on both sides of the heat sink (core) and the heat sink, such as tubes and fins, where the engine coolant is circulated and cooled by heat dissipation. Cooling is performed by an engine cooling device having a radiator structure with tank units to be assembled. This engine cooling device is installed in the front part of the vehicle body of a fire engine so that traveling wind can be efficiently passed through the heat radiating part.

  In addition, there is a fire engine in which a pump is driven by a traveling engine via a PTO or the like without mounting a dedicated prime mover for driving the pump. Therefore, in this type of fire engine, when the pump is driven (when the fire is extinguished), the engine must be operated without running air flowing through the heat radiating part of the engine cooling device, so that the engine is sufficiently cooled. The problem of being unable to do so occurs. As a result, the temperature of the exhaust gas exhausted to the exhaust system also rises, the temperature of the exhaust system rises considerably, and there is a problem in that various devices installed around the exhaust system are thermally damaged. . For this reason, there is a demand for the development of a technique that can sufficiently cool the exhaust system when the pump is driven.

  Conventionally, as a technique directed to sufficiently cooling an exhaust system when driving a pump in a fire engine, for example, a technique described in Patent Document 1 is known.

  Patent Document 1 describes an engine cooling device for a fire engine that includes a sub-radiator in addition to the above-described radiator structure that cools the engine and distributes a part of water for extinguishing as a cooling medium to the sub-radiator. Yes.

  The engine cooling device of a fire engine according to Patent Document 1 is one in which traveling wind is replaced with fire-fighting water as a cooling medium, and as a result, cooling of the exhaust system is achieved by enhancing the cooling performance of the engine. .

JP-A-9-250341

  In the engine cooling device for a fire engine according to Patent Document 1, a sub-radiator must be provided and piping for flowing fire-extinguishing water between the pump and the pump must be arranged. There is a problem that it cannot be applied to automobiles.

  The present invention has been made in consideration of such problems, and can be applied to a small-sized fire engine and can sufficiently cool the exhaust system when driving a pump. It is an object to provide a cooling device.

  In order to solve the above-mentioned problems, the exhaust system cooling device for a fire engine according to the present invention employs means described in each of the claims.

  That is, in claim 1, the exhaust system connected to the engine and extending from the exhaust manifold to the tail pipe is cooled, and the heat-resistant paint is applied to the surface of the exhaust system from the exhaust manifold to at least the muffler. In addition, a cooling fan that blows cooling air to the exhaust manifold is attached in the vicinity of the exhaust manifold of the exhaust system.

  With this measure, heat-resistant paint is applied to the upstream side of the exhaust system up to the relatively high temperature muffler to prevent the heat of the exhaust system from diffusing to the surroundings, while the exhaust manifold having the highest temperature in the exhaust system is cooled. By cooling with a fan, the exhaust system is cooled with a simple device configuration.

  Further, according to claim 2, in the exhaust system cooling device for a fire engine according to claim 1, a temperature sensor for detecting the temperature in the vicinity of the exhaust manifold of the exhaust system, and a temperature sensor connected to the temperature sensor and the cooling fan is at a temperature above a certain level. And a controller for instructing the cooling fan to drive the motor when it is detected.

  In this means, by providing the temperature sensor and the controller, the cooling is automatically executed when the temperature of the exhaust system becomes high.

  According to a third aspect of the present invention, in the exhaust system cooling device for a fire engine according to the second aspect, the power supply of the cooling fan is turned on when the pump for pressurizing and discharging the fire-extinguishing water is driven and the pump is driven. When the temperature sensor is stopped and the temperature sensor detects a temperature below a certain level, it is controlled by a controller so as to be turned off.

  In this means, the power supply of the cooling fan is turned on by the controller in conjunction with the driving of the pump, but when the exhaust system is maintained at a high temperature, it is turned off in conjunction with the stop of the driving of the pump. In addition, automatic cooling of the exhaust system can be reliably performed.

  The exhaust system cooling device for a fire engine according to the present invention is applied to the upstream side of the exhaust system up to the muffler, which is relatively hot, and the exhaust system is prevented from diffusing around the exhaust system while preventing the heat of the exhaust system from diffusing Since the exhaust manifold is cooled by a cooling fan, the exhaust system is cooled with a simple device configuration, so it can be applied to a small fire engine and the exhaust system can be used when driving the pump. There is an effect that it can be sufficiently cooled.

  Further, as claimed in claim 2, since the temperature sensor and the controller are provided so that the cooling is automatically performed when the temperature of the exhaust system becomes high, the use of the exhaust system is unnecessary by driving the cooling fan unnecessarily. There is no effect of cooling.

  Further, as claimed in claim 3, although the power supply of the cooling fan is turned on by the controller in conjunction with the drive of the pump, it is turned off in conjunction with the stop of the drive of the pump when the exhaust system is maintained at a high temperature. As a result, automatic cooling of the exhaust system can be surely executed, so that it is possible to expect safe and reliable cooling control of the exhaust system.

It is a block diagram of the form for implementing the exhaust-system cooling device of the fire engine which concerns on this invention. It is a top view of the principal part of FIG. It is a flowchart of control of FIG.

  EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing the exhaust-system cooling device of the fire engine which concerns on this invention is demonstrated based on drawing.

  In this embodiment, as shown in FIG. 1, a pump 1 that pressurizes and discharges fire-fighting water W to be discharged is implemented in a fire engine connected to an engine 3 via a transmission mechanism 2 such as PTO. Has been. .

  In this embodiment, as shown in FIG. 1, a cooling fan 5, a temperature sensor 6, and a controller 7 are attached to an exhaust system 4 connected to the engine 3.

  The exhaust system 4 is arranged from the exhaust manifold 41 connected to the engine 3 to the front pipe 42, the center pipe 43, the muffler 44, and the tail pipe 45. In addition to these components, a sub-muffler, a catalytic converter, etc. may be added. With respect to the exhaust system 4, heat resistant paint is applied to the surfaces of the exhaust manifold 41, the front pipe 42, the center pipe 43, and the muffler 44. The heat-resistant paint prevents exhaust gas flowing through the exhaust system 4 from heating the exhaust manifold 41, the front pipe 42, the center pipe 43, and the muffler 44 and diffusing heat to the surroundings. The above are selected. In addition, it is preferable to select a heat-resistant paint that can be tossed by spraying and has quick-drying properties in consideration of remodeling from a semifinished vehicle to a fire engine.

  The cooling fan 5 is installed on the side of the vehicle body of the exhaust manifold 41 of the exhaust system 4 and blows cooling air to the exhaust manifold 41, the front pipe 42 and the engine 3 (transmission etc.) of the exhaust system 4. About this cooling fan 5, the thing of the type attached to the engine cooling device of a radiator structure can be selected.

  The temperature sensor 6 detects the temperature of air near the exhaust manifold 41 of the exhaust system 4. The detection signal of the temperature sensor 6 is transmitted to the controller 7.

  The controller 7 is connected to the cooling fan 5 and the temperature sensor 6. When the temperature sensor 6 detects a temperature above a certain level, the controller 7 instructs the cooling fan 5 to drive, and when the temperature sensor 6 detects a temperature below the certain level. It is set to instruct the cooling fan 5 to stop driving. Further, the power supply of the cooling fan 5 is set to ON when the pump 1 is driven, and is set not to be turned OFF until the temperature sensor 6 detects a temperature below a certain level when the drive of the pump 1 is stopped. ing.

  According to this embodiment, when the pump 1 is driven by cooling the vicinity of the exhaust manifold 41 where the exhaust system 4 becomes the highest temperature by the blowing of the cooling fan 5, the running air is not passed through the heat radiating portion of the engine cooling device. Even if the engine 3 is operated and the engine 3 cannot be sufficiently cooled, the exhaust system 4 can be sufficiently cooled. Moreover, since the ventilation of the cooling fan 5 reaches the engine 3 and the like, the entire exhaust system 4 can be cooled from the engine 3 to some extent.

  Furthermore, since it is a simple apparatus structure which installs the cooling fan 5 which ventilates the exhaust system 4, it can apply to a small fire engine.

  Moreover, in spite of the simple device configuration, the temperature sensor 6 and the controller 7 execute control for automatically cooling the exhaust system 4 in conjunction with the driving of the pump 1. Even when the pump 1 is stopped, if the exhaust system 4 is not sufficiently cooled, the cooling of the exhaust system 4 by the cooling fan 5 is maintained. Therefore, safe and reliable cooling control of the exhaust system 4 can be expected.

  Furthermore, in addition to cooling by the cooling fan 5, a heat-resistant paint is applied to the upstream side of the exhaust system 4 up to the muffler 44, which is relatively hot, and diffusion of heat of the exhaust system 4 to the surroundings is prevented. The various devices installed around the exhaust system 4 are not thermally damaged.

  As described above, in addition to the illustrated embodiment, it is possible to apply heat resistant paint to the whole of the exhaust system 4 reaching the tail pipe 45.

  Furthermore, a plurality of cooling fans 5 can be installed.

  Furthermore, the cooling fan 5 can be installed at the upper part of the vehicle body and blown downward. According to this embodiment, there is an advantage that the cooling air whose temperature has risen can be easily discharged to the outside of the vehicle body.

1
Pump 2 Transmission mechanism (PTO)
3 Engine 4 Exhaust system 41
Exhaust manifold 44 Muffler 5 Cooling fan 6 Temperature sensor 7 Controller

Claims (3)

  It is connected to the engine and cools the exhaust system from the exhaust manifold to the tail pipe. A heat-resistant paint is applied to the surface of the exhaust system from the exhaust manifold to at least the muffler. An exhaust system cooling device for a fire engine, wherein a cooling fan for sending cooling air to the exhaust manifold is attached in the vicinity of the exhaust manifold.   2. An exhaust system cooling device for a fire engine according to claim 1, wherein the temperature sensor detects the temperature near the exhaust manifold of the exhaust system, and the cooling fan when connected to the temperature sensor and the cooling fan detects a temperature above a certain level. An exhaust system cooling device for a fire engine, comprising a controller for instructing driving.   The exhaust system cooling device for a fire engine according to claim 2, wherein the power supply of the cooling fan is turned on when the pump for pressurizing and discharging the fire-extinguishing water is driven and the pump is stopped and the temperature sensor is below a certain level. An exhaust system cooling device for a fire engine, which is controlled by a controller so as to be turned off when the temperature of the engine is detected.

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