JPH0454812Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention uses an aqueous solution mixed with antifreeze at a concentration determined according to the outside temperature to remove snow or ice accumulated on the wings of aircraft. This invention relates to a chemical mixing device used in a de-icer that emits .

[Purpose of the invention] This kind of conventional device is installed in the chemical line so that the mixing ratio of water and antifreeze does not change by checking the flow meter every time the amount of aqueous chemical liquid emitted from the de-icer changes. The throttle valve is manually operated to maintain a constant concentration. However, the problem is that the worker must check the flow meter and manually operate the throttle valve, which reduces work efficiency.

[Means for solving the problem] This invention was devised in view of the above-mentioned circumstances, and its outline is that it is equipped with a water tank and a chemical tank,
This water tank is communicated with the radiation nozzle by a water pipe through a water pump, the chemical liquid tank is communicated with the radiation nozzle by a chemical liquid pipe through a chemical pump, and the chemical liquid pump is connected by a bypass pipe. The chemical liquid conduit on the secondary side of the chemical liquid tank is in communication with the chemical liquid tank,
An opening/closing valve equipped with opening/closing driving means is interposed in this bypass conduit. A chemical flow meter is provided in the chemical liquid pipe line between the branch part and the radiation nozzle, and a water flow meter is provided in the water pipe line between the water pump and the radiation nozzle. Therefore, a computer unit is installed that can calculate the chemical mixture ratio of antifreeze and water and can change the output signal by comparing the actual chemical mixture ratio with a set mixture ratio that emits light in an optimal state according to the outside temperature. The opening/closing driving means is controlled by the output signal from this computer unit, so that even when the amount of antifreeze aqueous solution emitted from the de-icer changes, the antifreeze aqueous solution at the set mixing ratio is automatically maintained. An object of the present invention is to provide a device for mixing liquid medicine that is released.

[Example] The chemical liquid mixing device of this invention will be described below with reference to the attached drawings.

Fig. 1 is a perspective view showing a de-icer equipped with the chemical mixing device of this invention, Fig. 2 is a piping diagram of the chemical mixing device of this invention, and Fig. 3 shows part of a computer unit that can be used in the device. In the drawing, 1 is a movable part and a boom 2 is shown in the front view.
This de-icer is equipped with a basket 3 which can be raised and lowered through the de-icer 1, and the de-icer 1 is provided with a device 4 according to this invention.

The device based on this invention, as shown in Figure 2,
A water tank 5 and a chemical tank 6 in which a chemical solution such as antifreeze is stored
The water tank 5 is connected through a water pump 7 and a water pipe 8 to a radiation nozzle 9 disposed in the basket 3 at the tip of the boom. Further, the chemical liquid tank 6 is connected to the chemical liquid pipe line 11 via the chemical liquid pump 10.
The radiant nozzle 9 is connected to the water pipe 8 midway through the radiant nozzle 9. Further, the branch portion 11 a of the secondary side chemical liquid conduit 11 of the chemical liquid pump 10 and the chemical liquid tank 6 are communicated through a bypass conduit 12 . An opening/closing valve 14 equipped with a motor 13 serving as opening/closing driving means is disposed in the bypass conduit 12. A chemical liquid flow meter 15 is provided in the chemical liquid pipe line 11 between the branch portion 11a and the radiation nozzle 9, and a water flow meter 16 is provided in the water pipe line 8 between the water pump 7 and the radiation nozzle 9. Each is arranged. A computer unit 17 and both flowmeters 15 that can calculate the actual chemical mixture ratio based on the flow rate signals of both flowmeters 15 and 16, and can change the output signal by comparing the actual chemical mixture ratio with a set mixing ratio. , 16 are provided. The motor 13 is controlled by an output signal from a computer unit 17.

The computer unit 17 is equipped with an alarm means 17a that issues an alarm when the difference between the actual chemical mixture ratio and the set mixing ratio exceeds a certain level and continues for a certain period of time. The computer unit 17 also includes a setting guide (for example, colored black) 17b that can arbitrarily set a set mixing ratio that specifies the mixed concentration of water and a chemical solution, and a guide (colored in black) that indicates the actual mixing state of the chemical solution at the time of irradiation. For example, colored red)1
7c is formed, and at the same time as setting the setting guideline 17b, an output signal is output from the computer unit 17 to the motor 13, and the opening/closing valve 14 is opened to a constant degree by driving the motor 13, so that the mixed chemical solution of water and antifreeze is can be radiated in an optimal manner depending on the outside temperature.

[Operation] Since the device according to this invention is as described above, when the setting guideline 17b is arbitrarily set to open the on-off valve 14 and both pumps 7 and 10 are driven, water is radiated from the water tank 5. The chemical liquid is fed under pressure through the water pipe 8 in the direction of the nozzle 9, and the chemical liquid is fed under pressure from the chemical liquid tank 6 through the chemical liquid pipe 11 into the water pipe 8.
The chemical liquid mixed water is emitted from the radiation nozzle 9. At this time, the actual chemical mixture ratio is calculated by the computer unit 17 based on the signals from both flowmeters 15 and 16, and if it is lower than the set mixing ratio, the motor 1 is operated to open the on-off valve 14.
3, and if high, open/close valve 1
A signal is issued to the motor 13 to close the on-off valve 14 when the temperature is high, and a signal is issued to the motor 13 to close the on-off valve 14, and the chemical solution is separately supplied into the drug solution conduit 11 from the bypass conduit 12. Thereby, it is possible to automatically maintain the chemical liquid mixed water so that the set mixing ratio is always maintained.

[Effects of the invention] As described above, the device of this invention has the following effects.

(1) Even when changing the amount of radiation from the radiation nozzle, it is possible to always radiate water mixed with chemical liquid at the set mixing ratio.

(2) If a water mixture with a chemical solution that is significantly different from the set mixing ratio is emitted for a certain period of time, the operator will be notified by an alarm means, and the safety of the aircraft will be improved by emitting such a water mixture. It is possible to prevent sexuality from being threatened.

(3) Since the actual mixing ratio of the chemical liquid is fed back to the computer unit by both flow meters, once the setting guidelines are matched, calculate the average value of the opening degree of the on-off valve for each mixing ratio from each flow rate. , by suddenly changing its opening,
The responsiveness until the set mixing ratio is reached can be further improved.

(4) The closer the actual chemical liquid mixture ratio is to 0%, the closer the opening degree of the on-off valve is to the fully open position, which lowers the pressure in the chemical liquid pipeline and saves the power source.

(5) The bypass pipe can be installed on the vehicle side, and the weight of the boom, basket, etc. can be further reduced.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a de-icer equipped with the chemical mixing device of this invention, Fig. 2 is a piping diagram of the chemical mixing device of this invention, and Fig. 3 shows part of a computer unit that can be used in the device. FIG. In the drawing, 1...day icer, 4...
...Device according to this invention, 5... Water tank, 6... Chemical solution tank, 7... Water pump, 8... Water pipe, 9...
Radiation nozzle, 10... Pump for chemical solution, 11... Conduit for chemical solution, 12... Bypass conduit, 13... Motor (opening/closing driving means), 14... Opening/closing valve, 15
...Flowmeter for chemical liquid, 16...Flowmeter for water, 17...
...computer unit, 17a...alarm means,
17b...setting guideline, 17c...actual chemical mixture ratio guideline.

Claims (1)

[Claims for Utility Model Registration] 1. A water tank and a chemical liquid tank are provided, the water tank is connected to the radiation nozzle by a water pipe via a water pump, and the chemical liquid tank is connected to a chemical liquid pipe via a chemical pump. The branch part of the chemical liquid pipe line on the secondary side of the chemical liquid pump is communicated with the radiation nozzle by a passage, and the chemical liquid tank is communicated with the branch part of the chemical liquid pipe line on the secondary side of the chemical liquid pump, and an on-off valve equipped with an opening/closing drive means is interposed in this bypass pipe line, and the above-mentioned A chemical flow meter is installed in the chemical liquid conduit between the branch and the radiation nozzle, and a water flow meter is installed in the water conduit between the water pump and the radiation nozzle. A computer unit is provided which is capable of calculating the chemical liquid mixing ratio by using the above-mentioned method, and which can change an output signal by comparing the actual chemical liquid mixing ratio with a set mixing ratio. A chemical liquid mixing device whose means are controlled. 2. Utility model registration claim 1, wherein the computer unit is equipped with an alarm means that issues an alarm when the difference between the actual chemical liquid mixing ratio and the set mixing ratio exceeds a certain level and lasts for a certain period of time or more. The chemical liquid mixing device described. 3. A setting guideline that allows the set mixing ratio to be arbitrarily set and a guideline that indicates the actual chemical mixture ratio are formed in the computer unit, and at the same time as the setting guideline is set, an output signal is output from the computer unit to the opening/closing driving means. A chemical liquid mixing device according to claim 1 of the utility model registration claim.