JPH0229040Y2 - - Google Patents

Description

[Detailed explanation of the invention] A. Purpose of the invention Industrial application field This invention is used to remove ice and snow from airplanes, etc., and to prevent ice formation by discharging high-temperature water, antifreeze, or a mixture of the two. This relates to the de-icing car that performs the work.

BACKGROUND TECHNOLOGY During cold weather, ice and snow may form on airplanes. Ice and snow as mentioned above are obstacles to airplane navigation, and ice in particular
This may render the control surfaces such as aileron and rudder inoperable, leading to a serious accident. Therefore, de-icing cars are used to remove the ice and snow and to prevent ice from forming.

FIG. 2 is a schematic explanatory diagram of the conventional de-icing car.

In FIG. 2, a support frame 2 that supports the first boom 1 in a vertically movable manner is disposed at the rear of the vehicle body of the de-icing car D via a turntable 3 that is rotatable on a horizontal plane. Above first boom 1
consists of two booms 1a and 1b of the same length, and both ends of each boom are pivotally connected to a support frame 2 and an elbow frame 4 so as to maintain the parallel state of each boom 1a and 1b. A second boom 5 is supported on the elbow frame 4 so as to be movable, and a basket 6 on which a worker rides is supported on the tip of the second boom 5 so as to be swingable. Between the elbow frame 4 and the basket 6, the second
A parallel rod 7 having the same length as the boom 5 is arranged parallel to the second boom 5. Therefore, the support frame 2, each of the booms 1a and 1b of the first boom 1, and the elbow frame 4, the elbow frame 4, the second boom 5, the parallel rod 7, and the basket 6 each form a parallel link mechanism. , the basket 6 is always maintained vertically regardless of the elevation angle of the first boom 1 and the second boom 5. Reference numbers 8 and 9 in the figure are hydraulic cylinders for raising and lowering the first boom 1 and the second boom 5, respectively.

In the basket 6 of the above deicing car D,
A liquid discharge nozzle 10 is provided, and a tank T is mounted behind the driver's seat. Above liquid discharge nozzle 1
A liquid discharge system piping as shown in FIG. 3 is provided between the tank T and the tank T.

In Fig. 3, tank T is equipped with low pressure pump 1.
1. Circulation pipe 13 returning to tank T via heating device 12, high pressure pump 14, check valve 1
A supply pipe line 16 that reaches the liquid discharge nozzle 10 via the pipe 5 is connected. The return side of the circulation pipe 13 to the tank T is connected to a cistern 17 attached to the tank T.

The operation procedure of the conventional de-icing car D will be explained below.

First, a liquid mixture of an antifreeze such as ethylene glycol and water is stored in a tank T. Next, the low pressure pump 11 and heating device 12 disposed in the circulation pipe 13 are operated to circulate the mixed liquid within the circulation pipe 13 and heat the entire amount of the mixed liquid in the tank T.

The mixed liquid in the tank T has a predetermined temperature, for example, about
After the temperature is raised to 80° C., the high-pressure pump 14 is activated and the mixed liquid is pumped through the supply pipe 16 toward the liquid discharge nozzle 10 .

The worker in the basket 6 directs the liquid discharge nozzle 10 toward the frozen or snowy area of the airplane and discharges the mixed liquid to melt and remove the frozen or snowy area. Further, at this time, the antifreeze contained in the liquid mixture prevents the airplane from re-icing.

Problems that the invention aims to solve: Since the conventional de-icing car described above heats the entire amount of the mixed liquid in the tank, it takes a long time for the mixed liquid to reach a predetermined temperature. The immediacy is poor, and it is not possible to heat only the amount necessary for the work, resulting in a large energy loss.

In addition, in the above-mentioned conventional de-icing car, the tank stores a mixture of water and antifreeze at a predetermined ratio, so the amount of water in the mixture changes depending on the snow and ice conditions of the airplane. It was not possible to immediately change the mixing ratio with antifreeze, and the adaptability to the above-mentioned snowy and icy conditions was poor.

B. Means for solving the structural problems of the invention This invention consists of a water tank Tw and an antifreeze tank T _AF.
, a water supply pipe Pw in which a low-pressure pump 20, a heating device H, and a first pressurizing pump 21 are disposed, and a second
An antifreeze supply pipe _PAF in which a pressure pump 22 and a flow rate control valve _VFC are arranged, and a liquid discharge nozzle 10 are provided.
This is a de-icing car in which the water supply pipe Pw and the antifreeze supply pipe _PAF are joined downstream of the flow rate control valve _VFC , and the mixed liquid is discharged from the liquid discharge nozzle 10.

Embodiment Hereinafter, an embodiment in which the present invention is applied to a conventional de-icing car illustrated in FIG. 2 will be described.

FIG. 1 is a piping diagram of a liquid discharge system of a de-icing car according to the present invention.

In Fig. 1, the de-icing car according to the present invention is equipped with a water tank Tw and an antifreeze tank T _AF in place of the tank T of the conventional de-icing car, and the water tank Tw is equipped with a water supply pipe. The upstream side of Pw is the antifreeze supply pipe to the antifreeze tank T _AF .
The upstream sides of P _AF are connected to each other.

The water supply pipe Pw includes a low-pressure pump 20 that supplies water from the water tank Tw to the heating device H, a heating device H that rapidly heats water to a predetermined temperature, and water heated by the heating device H. A first pressurizing pump 21 is disposed for supplying the antifreeze fluid from _the antifreeze tank _TAF to the first switching valve _V1 provided in the basket 6. A second pressurizing pump 22 and a basket 6 pump the antifreeze liquid toward the flow control valve _VFC provided in the
A flow meter M _F for measuring the flow rate of antifreeze from the flow control valve V _FC is provided.

The water supply pipe Pw merges with the downstream side of the flow rate control valve V _FC of the antifreeze supply pipe P _AF on the downstream side of the first stop valve V ₁ and reaches the liquid discharge nozzle 10 .

A second stop valve V ₂ is disposed in the circulation pipe Pc that branches from the discharge side of the first pressurizing pump 21 of the water supply pipe Pw and reaches the water tank Tw, and is connected to the antifreeze supply pipe Pc. A safety valve Vs is provided between the discharge side of the second pressurizing pump 22 of the conduit P _AF and the antifreeze tank T _AF .

In addition, in FIG. 1, reference symbols Vc ₁ and Vc ₂ are
Water supply pipe Pw and antifreeze supply pipe P _AF, respectively.
This is a check valve installed in the

Further, the liquid discharge nozzle 10 is of a type that can freely change the liquid discharge state from a diffused state to a concentrated state by changing the nozzle opening degree.

The operating procedure of the de-icing car according to the present invention will be explained below.

First, fill the water tank Tw and antifreeze tank _TAF with water and antifreeze, respectively.

Next, the low pressure pump 20, the heating device H, and the first pressure pump 21 are operated to force-feed high temperature and high pressure water toward the first stop valve _V1 , while the second pressure pump 22 is operated. Let high pressure antifreeze flow control valve
Pump it towards V _FC .

Thereafter, the first stop valve V ₁ is opened, and the flow rate control valve V _FC is operated while monitoring the flow meter M _F to supply high-temperature, high-pressure water downstream of the stop valve V ₁ in the water supply channel Pw. The mixed liquid is mixed with high-pressure antifreeze liquid, and the mixed liquid is discharged from a liquid discharge nozzle 10 toward the frozen or snowy area of the airplane to remove the frozen or snowy area. The above-mentioned mixing ratio of water and antifreeze is adjusted by operating the flow control valve V _FC while monitoring the flow meter _MF depending on the icy or snowy state of the airplane.

If the icy state or snowy state of the aircraft is slight, the flow control valve V _FC is closed, the second pressurizing pump 22 is stopped, and the pumping of antifreeze is stopped;
When only high-temperature, high-pressure water is to be discharged from the liquid discharge nozzle 10, and only antifreeze liquid is to be discharged to prevent freezing of the airplane, the first stop valve _V1 is closed;
The flow control valve 25 may be opened after the low pressure pump 20, the heating device H, and the first pressure pump 21 are stopped and the second pressure pump 22 is activated.

In addition, in the embodiment of the present invention, the first stop valve
Close V ₁ , low pressure pump 20, heating device H, first
The pressurizing pump 21 of V 2 is activated, and the second stop valve V _{2 is} activated.
By opening the water tank, the water in the water tank Tw is transferred from the water supply pipe Pw to the circulation pipe Pc and returned to the water tank.
The water in the water tank Tw can be circulated through the Tw to heat it and prepare it for the next ice or snow removal operation.

C. Effect of the invention As explained above, the de-icing car according to the invention stores water and antifreeze in separate tanks, and heats only the required amount of water and controls the supply amount by the flow rate control valve. The adjusted antifreeze liquid is mixed just before the liquid discharge nozzle, and the mixed liquid is discharged from the liquid discharge nozzle, so the mixing ratio of water and antifreeze liquid can be freely adjusted depending on the ice and snow conditions. Moreover, since only the necessary amount of water is heated, time and energy losses are small.
To provide a de-icing car that is highly adaptable to freezing and snow conditions since only the required amount of antifreeze is consumed, has short time required to start work, is highly immediate, and is economical for work. became possible.

In addition, in the embodiment of the present invention, by operating the first stop valve and flow control valve installed in the water supply pipe, high-temperature, high-pressure water, antifreeze, or a mixture of the two can be used for the work, i.e., ice formation, snow accumulation, etc. The water can be selectively discharged from the discharge nozzle depending on the removal work and ice prevention work, and the water in the water tank can be preheated by circulating water between the water tank and the heating device. It is also possible to prepare for ice and snow removal operations.

[Brief explanation of drawings]

Figure 1 is a piping diagram illustrating the liquid discharge system piping structure of the de-icing car according to the present invention, Figure 2 is a side view illustrating the appearance of the de-icing car, and Figure 3 is a conventional de-icing car discharge system. FIG. 2 is a piping diagram illustrating a liquid system piping structure. 10...Liquid discharge nozzle, 20...Low pressure pump, 2
1...First pressure pump, 22...Second pressure pump, H...Heating device, Pw...Water supply pipe, P _AF
...Antifreeze supply pipe, Tw...Water tank, T _AF ...
...Antifreeze tank, V _FC ...Flow control valve.

Claims (1)

[Scope of utility model registration request] A water tank, an antifreeze tank, a water supply pipe line in which a low pressure pump, a heating device, and a first pressure pump are arranged, an antifreeze supply pipe line in which a second pressure pump and a flow rate control valve are arranged, Equipped with a liquid discharge nozzle,
A de-icing car characterized in that the water supply pipe and the antifreeze supply pipe are joined downstream of a flow rate control valve, and the mixed liquid is discharged from a liquid discharge nozzle.