JPS6229100Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an air intake device for tanks such as chemical solution tanks.

For example, an agricultural tractor is equipped with a chemical liquid tank at the front of the machine, and performs pest control work by pumping the chemical liquid in the tank and guiding it to a jet pipe at the rear of the vehicle.

In this case, since the contents of the tank are chemical liquids, it is desirable to prevent them from leaking out during traveling operations, and it is also preferable to achieve this prevention with an extremely simple structure.

However, according to the conventional structure, since the tank cap itself had an air hole penetrating through it, the internal liquid directly leaked out due to the rippling phenomenon caused by driving.

This idea was devised to prevent such leakage, and therefore, the feature here is that an air intake pipe is provided in the tank cap that is attached to the tank such as a chemical tank. The lower end opening of the intake pipe corresponds to the vicinity of the bottom of the tank, and
The main point is that an intermediate inlet is opened on the outer circumference of the upper part of the intake pipe.

This invention will be explained below with reference to illustrated embodiments.

What is shown in FIGS. 1 to 3 is an example of a configuration for an agricultural tractor. First, let me explain the outline of the tractor. 1 is the body of the tractor, and the body 1 is the front part. Bonnet 2
A transmission case 4 connected to the engine 3 is arranged at the rear of the engine 3. The engine 3 has a front wheel bearing frame 5 extending forward from both sides thereof, and its shape is a planar gate type with a pair of left and right side plates 5a and a front end connecting plate 5b. A cooler (not shown) is provided in the upper part of the front axle bearing frame 5, and a center-pivoted front axle 7 for the front wheels 6 is provided in the lower part.

On the other hand, at the rear of the tractor is a rear axle case 8 and a rear wheel 9.
A fender 10 for use is arranged, and a seat 1 is placed on the top.
A hydraulic system 12 equipped with a hydraulic system 1 is fixedly mounted on the vehicle.
From this hydraulic device 12, a lift arm 13 can be freely lowered, and a lift rod 15 is connected between a lower link 14 and a top link 16, forming a well-known three-point link mechanism. In this way, the tilling rotary 17 is configured to be pulled up and down freely through the link mechanism, and here, the outline of the rotary 17 will be described enumeratively. Fitting 1
9, 20 is a top mast that connects the top link 16, 21 is a left transmission case, 22 is a right side plate, 23 is a rotary cover, and a support frame 25 for the rear two wheels 24 is connected to a plowing depth adjustment mechanism 26. It is supported by

The above is an overview of the tractor and the rear working machine, and a pest control means is constructed as shown in FIGS. 1 and 2.

That is, the side surface L is inserted through the front end of the front vehicle bearing frame 5.
A tank support 27 in the shape of a letter is provided with an overhang, and a chemical solution tank 28 is mounted on this support 27 and fixed with a band. In particular, the tank cap 29 that is the subject of this invention is a cap placed on the upper right side of the tank 28. The details thereof are constructed as shown in FIG.

As shown in the third figure, a cap opening 30 is provided protruding from the upper end of the tank 28, and a tank cap 29 that can be opened and closed is provided on the cap opening 30, all of which are molded from resin.

An insertion hole 31 is formed in the center of the tank cap 29, into which a first intake pipe 32 with a flange is inserted and supported, and a nut 34 is screwed into the hole through a packing 33 and fixed thereto. 35 is an intermediate inlet opened in the middle of the first intake pipe 32, and the second intake pipe 3 is connected to the second intake pipe 3 through the lower end of the first intake pipe 32.
6 is fixed with a band. The second intake pipe 36 may be a normal soft pipe or a hard pipe, and has its lower end opening 37 facing slightly above the bottom wall of the tank 28. In this way, the first and second intake pipes 32, 36
The air intake pipe 38 is configured by. As an additional explanation, reference numeral 39 is a mounting bracket protruding from the front right side of the front vehicle bearing frame 5, and a small general-purpose engine 40 with a recoil starter is mounted on this bracket 39 as a tank-specific engine. At the same time, a pump (not shown) rotationally driven by the pump (not shown) is arranged in parallel, and the chemical liquid taken out through the suction pipe 41 installed between the pump and the chemical liquid tank 28 follows the path indicated by the arrow in Figure 1. It is connected to a spray pipe 42 at the rear end, and is configured to spray a chemical solution after tilling. In addition, 43 is the mounting bracket 39
An accelerator lever 45 for the dedicated engine 40 is also equipped with a support rod for the fuel tank 44 installed above.

In addition to these embodiments, first, regarding the air intake pipe 38, as shown in FIG.
6 may be integrated, and the intermediate conduction port 35
In some cases, a plurality of holes may be provided in the circumferential direction or a plurality of holes may be provided above and below, and in these cases, they are all formed as minute holes. Furthermore, although the mounting bracket 39 for the dedicated engine 40 and the like mentioned above was of a separate type, it is provided with a first tank support 46 and a second tank support 47 as shown in FIGS. It may be formed integrally on the right side of the tank support 46. In that case, an auxiliary bracket 48 is connected to the rear of the mounting bracket 39, and necessary equipment such as the engine 40 and fuel tank 44 are connected via these brackets. In addition to the suction pipe 41, there is a return pipe 51 used when circulating the flow by operating the Kotoku 50, a relief pipe 52 for returning by pressure adjustment, and a liquid jet pipe 42.
A discharge pipe 53 and the like communicating with the above are also provided. Although the above description has been made regarding a tractor, the present invention can also be applied to other vehicles, particularly two-wheeled or one-wheeled hand-push type or self-propelled type. Also, the contents inside the tank may simply be liquid water.

Therefore, in the above structure, when pump suction is performed, insufficient air is supplied through the intermediate communication port 35, and pumping is performed without resistance. Therefore, even if the vehicle shakes violently and the chemical liquid ripples violently, there is less risk of it leaking outside.

Also, depending on the amount of pumping, air may be discharged from the lower end opening 37, and in this case, the chemical solution contained therein is effectively stirred.

This invention is as described above, and therefore, leakage of contents in the tank is prevented, and it is suitable from the viewpoint of safety, especially when a chemical solution is used.

[Brief explanation of the drawing]

Fig. 1 is a side view of a tractor showing an example of this invention, Fig. 2 is its plan view, and Fig. 3 is Fig. 2-
4 is a sectional view showing another embodiment of the air intake pipe, FIG. 5 is a plan view showing another example of mounting tanks and engines, and FIG.
FIG. 28... (chemical solution) tank, 29... tank cap, 35... intermediate passage port, 37... lower end opening, 38... air intake pipe.

Claims (1)

[Scope of utility model registration request] A tank cap attached to a tank such as a chemical solution tank is equipped with an air intake pipe, the lower end opening of the intake pipe corresponds to the vicinity of the bottom of the tank, and an intermediate inlet is opened on the outer periphery of the upper part of the intake pipe. An air intake device for tanks such as chemical liquid tanks, characterized by: