JPH0740589U - Overflow warning device for liquid tank - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose is to prevent the overflow that tends to occur when refueling or watering a liquid tank. [Structure] A pipe 2 is arranged by a clip 4 on an inner wall of a cylindrical inlet 16 of a liquid tank, and a float is provided therein, and the float is filled with a thin rod 1d at an upper end of a thick rod-shaped floating portion 1a. Thick rod-shaped mark 1 that serves as a mark for the tongue position
In addition to b, a large diameter portion 1c is formed at the lower end of the floating portion 1a via a thin rod 1d, and they are integrally formed. Further, two stoppers are provided in the pipe 2 that hit the upper and lower end surfaces of the floating portion 1a and regulate the vertical movement amount of the float.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for informing a fuel tank, a water tank, or the like of a construction machine to prevent the overflow by informing that the liquid is full.

[0002]

[Prior art]

 Fuel tanks and water tanks used for large-scale construction machines such as power shovels have a cylindrical inlet on the top of a box-shaped tank, and the amount of liquid injected on the side. There is a level gauge attached to let you know. When injecting liquids into the above fuel tanks, etc., they are directly injected from tank trucks at construction sites and other places where they are used. That is, a tank truck or other liquid injection nozzle is inserted into a fuel tank or other injection port to supply oil or water. At this time, if the injection is not stopped when the liquid reaches a predetermined amount (full tank), the liquid will overflow. Normally, the liquid injection nozzle of tank trucks does not have a function to stop the injection automatically by sensing the rise of the liquid level with a sensor attached to the tip of the nozzle, so it is filled up. The decision was made by the liquid injector himself, by checking through the inside of the injection port to see if the liquid level had risen, or by using a level gauge installed on the side of the liquid tank.

[0003]

[Problems to be solved by the device]

 However, the location of the liquid tank for construction machinery is usually higher than the drive system such as the caterpillar, and the liquid tank is large because it contains a large amount of liquid. Therefore, the position of the inlet on the upper surface of the liquid tank is high. As a result, it is not possible to stand and pour on the side of the construction machine, so you will have to climb to the top of the liquid tank and pour from above. Then, it is difficult to look at the level gauge on the side of the tank to check the rise of the liquid level when performing the injection work by one person. At that point, you should look inside the inlet to see the rise in the liquid level.However, since the inlet is not so large and the tank is dark, it may be difficult to notice the rise in the liquid level. The liquid could overflow and the liquid could overflow due to excessive injection. The present invention has been made in view of the above-mentioned circumstances, and when the injection worker looks into the upper part of the inlet, the float with the float indicating the stored liquid volume inserted in response to the rise of the liquid level is raised. Is installed near the inlet so that it can be seen that the liquid level has risen to near full, so that the injection can be stopped when the liquid is full, and the float The purpose is to prevent the float from coming out of the pipe by limiting the amount of vertical movement.

[0004]

[Means for Solving the Problems]

 In order to achieve the above object, the overflow warning device for a liquid tank of the present invention is arranged such that a pipe is vertically arranged inside a cylindrical inlet of a liquid tank and a float is provided in the pipe to prevent the liquid from rising. Accordingly, the float is raised so that the full tank position can be confirmed. The float has a thick rod-shaped floating part with a mark part for indicating the amount of liquid stored through a thin rod at the upper end, and a large-diameter part with a thin rod at the lower end of the floating part for floating inside the pipe. Two stoppers were installed to control the upward and downward movement of the float by hitting the upper and lower end faces of the float, so that the float does not come out of the pipe. In addition, a liquid injection pipe formed of a screen with a large number of small holes is constructed so that it can be inserted into the liquid injection port of the liquid tank, and the pipe is placed on the peripheral wall of the liquid injection pipe in an upward and downward direction. It is also possible to achieve the object by providing the float having the above-mentioned configuration and providing two stoppers in the pipe, which come into contact with the upper and lower end surfaces of the floating portion and which regulate the vertical movement amount of the float.

[0005]

[Action]

 By providing the overflow warning device of this invention at the liquid inlet of the liquid tank, when the liquid level reaches near full while the liquid is being injected from the inlet of the liquid tank, Liquid enters inside the pipe. When the liquid surface reaches the float, the float floats due to the buoyancy of the float and rises with the liquid surface. Then, since the mark at the upper end of the float projects from the upper end of the pipe, the liquid injector can easily confirm from above the injection port that the liquid tank is full. In addition, since the stopper is provided on the inner wall of the pipe to control the vertical movement amount of the float, the float does not jump out from the pipe.

[0006]

【Example】

 Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. The overflow warning device for the liquid tank T mounted on a construction machine or the like is incorporated in the tubular inlet 16 on the upper surface of the liquid tank T made of resin or the like, and the tubular inlet 16 is a separate part. And is formed integrally with the tank portion. An opening 6 having a smaller diameter than that is provided in the upper part of the cylindrical inlet 16, and a pipe 2 is provided from the opening 6 in the direction of the liquid tank T 1. The pipe 2 is held by a clip 4 fixed to the inner wall of the tubular inlet 16 by welding or the like, and is attached along the inner wall of the tubular inlet 16 so that the float 1 can move up and down in the pipe 2. The float 1 is provided so that when the amount of liquid in the tank becomes full, the float 1 rises to inform the liquid injecter of the full amount.

The float 1 is formed of, for example, a foaming resin, has a thick bar-shaped floating portion 1a, and a thick bar-shaped mark portion 1b serving as a mark for a full tank position at the upper end of the thick bar-shaped floating portion 1a. A large diameter portion 1c is formed at the lower end of the floating portion 1a via a thin rod 1d, and these are integrally formed. When the liquid tank is almost full, the mark portion 1b tries to protrude from the upper end of the pipe 2, but the cap C restricts it from protruding. At this time, since the tip of the mark portion 1b is spherical, the cap C that closes the upper end of the cylindrical inlet 16 is not damaged. The pipe 2 for accommodating the float 1 is formed in a long tubular shape with both ends open, and its lower end is closed by a plate 9 to prevent the wave of the liquid surface from directly acting on the float 1. A small hole 9a for introducing the fuel into the pipe 2 is opened at the center of the. Further, the inner wall of the pipe 2 is provided with two stoppers for hitting the upper and lower end surfaces of the floating portion 1a to regulate the vertical movement amount, and at the liquid full position, the upper end of the floating portion 1a of the float 1 is on the upper side. The large-diameter portion 1c hits the lower stopper 3 and its rise is restricted. When the amount of liquid is small, the float 1 is lowered downward, and the lower end of the mark portion 1b contacts the upper stopper 3 and the lower surface of the floating portion 1a contacts the lower stopper 3 to regulate the amount of lowering of the float 1. In the stopper 3, two half ring plates are arranged to face each other with a space S therebetween, and the liquid smoothly passes through the space S so that the thin rod 1d of the float 1 can move up and down. . By the way, the shape of the floating portion 1a of the float 1 may be such that the floating portion 1a floats on the liquid surface of the fuel in the pipe 2 and rises steadily. Depending on the shape of 2 and the length of the mark portion 1b, the floating portion 1a may have a spherical shape or the like, and is not limited to a cylindrical shape. It should be noted that if the entire mark portion 1b indicating the amount of liquid stored is colored, it becomes easier for the liquid injecter to confirm the rise of the float 1, and overflow can be prevented.

Next, an overflow warning device according to a second embodiment of the present invention will be described with reference to FIGS. 4 and 5. The overflow warning device for the liquid tank T of this embodiment is used by inserting it into the cylindrical inlet of the liquid tank. That is, the cylindrical filter body 8 to be inserted into the cylindrical inlet port is formed by the screen 12 having a large number of small holes for filtering, and is set at the upper end of the tubular filter member 8 for the cylindrical inlet port. The flange portion 13 is provided. Further, a pipe 2 is vertically mounted on the outer surface of the peripheral wall of the tubular filter body 8, and the float 1 is placed in the pipe 2. The pipe 2 was attached to the tubular filter body 8 integrally with bands 14 at several places.

Also in this embodiment, the float 1 has a thick rod-shaped mark bar 1b at the upper end of the floating portion 1a via a thin rod 1d and the thin rod 1d at the lower end of the floating portion 1a in the same manner as in the previous embodiment. Has a large diameter portion 1c. Further, two stoppers with which the upper and lower end surfaces of the floating portion 1a abut are provided in the pipe 2 to regulate the vertical movement amount of the float 1. Therefore, the float 1 does not fall out from the pipe 2, which is very convenient when the tubular filter 8 is moved or stored. The other constituent operations of the float 1, the pipe 2 and the stopper 3 are the same as those of the first embodiment. In the above two embodiments, the liquid tank as the gasoline tank mounted on the construction machine has been described, but the present invention can also be applied to a kerosene tank, a water tank, etc. not mounted on the construction machine.

[0010]

[Effect of device]

 With the overflow warning device for a liquid tank of the present invention, when a liquid injecter looks into the inlet and injects the liquid, when the inside of the tank approaches full, the float in the pipe attached to the inlet rises. It is possible to confirm the protruding mark part. Therefore, it is possible to accurately know the full tank position while supplying the liquid from the inlet into the tank, and it is possible to reliably prevent the liquid from overflowing. In addition, since the movement amount of the float is restricted by the stopper provided inside the pipe, it does not come off from the pipe and there is no worry of losing the float, which is convenient for storage. Furthermore, when using the liquid injection pipe equipped with the overflow warning device at the inlet of the liquid tank, it can be installed at the inlet of the existing liquid tank and used, so there is no need to modify the tank. Liquid overflow can be prevented at a very low cost. Further, since the liquid injection pipe is easily attached and detached, the inside of the pipe can be easily cleaned.

[Brief description of drawings]

FIG. 1 is a plan view of a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line CC of FIG.

FIG. 4 is a plan view of a second embodiment of the present invention.

5 is a sectional view taken along line BB of FIG.

[Explanation of symbols]

 1 Float 2 Pipe 3 Stopper 8 Cylindrical filter 16 Cylindrical inlet

Claims (2)

[Scope of utility model registration request] 1. A pipe is arranged vertically inside a cylindrical inlet of a liquid tank to provide a float in the pipe, and the float has a thick rod-like floating portion with a thin rod at the upper end to store the amount of the stored liquid. In addition to having the mark portion shown, a large diameter portion is provided at the lower end of the floating portion via a thin rod, and two stoppers that control the vertical movement amount of the float by hitting the upper and lower end surfaces of the floating portion inside the pipe. An overflow warning device for a liquid tank, which is provided with. 2. A liquid injection pipe formed by a screen having a large number of small holes is configured to be insertable into a liquid injection port of a liquid tank, and the pipe is vertically arranged on the peripheral wall of the liquid injection pipe, and inside the pipe. The float is provided with a thick rod-shaped floating portion having a mark portion indicating the amount of the stored liquid through the thin rod at the upper end, and the floating portion has a large diameter portion at the lower end through the thin rod, An overflow warning device for a liquid tank, characterized in that two stoppers for hitting the upper and lower end surfaces of the floating portion and regulating the vertical movement amount of the float are provided.