JPH0624397Y2 - Oil supply device in tank truck - Google Patents

Description

[Detailed Description of the Invention] (Field of Utilization of the Invention) The present invention relates to the oil filled in the tank of the tank truck,
The present invention relates to an oil feeding device provided at the bottom of a tank for taking out liquid such as chemicals and gasoline to the outside or filling the tank from the outside.

(Prior Art) A bottom valve is provided at the bottom of the tank for each compartment in the tank, and each bottom valve is provided with a quick shut-off valve for shutting off the outlet port thereof in an unexpected situation. Each bottom valve is equipped with an oil feed pipe and an oil feed pump, and combustible oil such as gasoline and light oil is forcibly discharged when it is discharged to the outside, and is naturally discharged. Although necessary, an oil pipe for natural discharge is generally provided in the past. Therefore, the piping structure is extremely complicated and very expensive.

(Problems to be solved by the invention) The present invention provides this kind of oil feeding device in which the piping structure is made as simple as possible and smooth forcible oil input / output and natural oil discharge can be performed. Is what you are trying to do.

(Means for Solving Problems) In order to solve the above problems, according to the present invention, the inside of the tank 1 in the tank truck is divided into a plurality of oil chambers, and a bottom portion 2 of each oil chamber is formed in a longitudinal direction. In an oil feeding device in which a bottom valve 3 and each emergency shutoff valve 4 are provided at appropriate intervals, and an oil feeding pipe 5 is attached to each bottom valve 3, a tank bottom portion 2
Is provided with a slight downward slope from the front to the rear, the oil feed pipe 5 is arranged along the inclined tank bottom 2, and an opening / closing cock 7 is provided at the end of the oil feed pipe 5, At the rear end portion, a switching valve 6 is connected in series between the tank side oil feeding pipe 7 and the opening / closing cock side oil feeding pipe 8 and the switching valve 6 is directly connected to an oil feeding pump 9 to connect the oil. A forced discharge position for forcibly discharging the oil from the tank side oil supply pipe 5 to the opening / closing cock side oil supply pipe 8, a forced inflow position for forcibly flowing from the opening / closing cock side oil supply pipe 8 to the tank side oil supply pipe 5, and the oil supply It has a function of a 4-port 3-position switching valve that switches to a neutral position where oil circulates in the pump 9, and the switching valve 6 is connected to the forced discharge inflow passage at the forced discharge position and the forced inflow position. Refueling when overloaded The pressure regulating valve 37 is provided so that the pump 9 is in a neutral state, and the switching valve 6 communicates the tank side oil feeding pipe 5 with the open / close cock side oil feeding pipe 8 in the neutral position. Is adopted.

(Embodiment) FIG. 1 mainly shows a tank 1 of a tank truck and its piping portion. A bottom portion 2 of the tank 1 is provided so as to incline downward from the front to the rear, and the inside of the tank 1 is It is divided by partition walls 10 and 10, and a bottom valve 3 is attached to the bottom portion 2 of each of the compartments. Bottom valve 3
Is opened and closed by operating a handle 12 provided on the top of the tank 1 through a long connecting rod 11 extending upward inside the tank. The bottom valves 3, 3, 3 are connected in series by an oil feed pipe 5 via an emergency cutoff valve 4 provided in each of the bottom valves 3, 3, 3 as shown in FIG. A switching valve 6 having a pressure regulating valve 37 and an opening / closing cock 7 are connected in series by an oil feed pipe 8 in series. An oil feed pump 9 is directly connected to the switching valve 6.

The relationship between the bottom valve 3 and the emergency shutoff valve 4 is as shown in FIG. That is, the portal valve body of the bottom valve 3 attached to the tank bottom 2
A valve body 14 is attached to 13 by a valve rod 15 connected to a connecting rod 11 so as to be movable up and down, and the valve body 13 is communicated with a valve body 17 of an emergency shutoff valve 4 through a flow hole 16 penetrating the tank bottom 2. The valve body 18 connected to this is pivotally attached to the crank pin 21 at the tip of the rotary shaft 20 and the valve rod 19 is moved up and down by rotating the rotary shaft 20. At the free end of the rotary shaft 20, a swing rod 23, which is pulled by a spring 22, is attached, and the swing rod 23 is connected to an operating lever 26 via connecting rods 24 and 25 as shown in FIG. There is. Therefore, by operating the handle 12 from the top of the tank 1, the valve body 14 is moved up and down to open and close the valve hole 27, and in case of an unexpected situation such as oil leak, the operating lever 26 is operated, The valve body 18, which is normally pulled and opened by the spring 22, is moved to the closed position to close the valve hole 28.

In the present embodiment, in particular, on the outer peripheral side of the portal valve body 13, a net-shaped or perforated plate-shaped tubular filter 29 is attached so as to surround the portal-shaped valve main body 13, and foreign matter such as dust is blocked by the filter 29. To prevent entry into the valve body 13.

The structure of the switching valve 6 and the function of the oil feed pump 9 directly connected thereto will be described with reference to FIGS. 4A, 4B to 6A, B. First, the valve body 30 of the switching valve 6 is located on the bottom valve 2 side. The left port 31 connected to the oil feed pipe 5, the right port 32 connected to the oil feed pipe 8 on the opening / closing cock 7, the suction port 33 directly connected to the suction port 9a of the oil pump 9, and the discharge port 9b thereof. And a valve body 35 attached thereto has a passage hole 36 having a substantially U-shaped wall surface in a front view and a substantially arc-shaped wall surface in a side view.
Have.

The valve rod 48 attached to the valve body 35 is formed in an elongated shape as shown in FIG. 2, and its free end is connected to the operation handle 43.
The pointer 44 is rotated to match N, D and S as described later.

Further, the pressure regulating valve 37 is provided with a valve hole 39 communicating with the partition wall 38 between the suction port 33 and the discharge port 34 in the valve body 30, and a valve body 41 having a guide projection 40 is regulated in the valve hole 39. The structure is supported and attached to the pressure spring 42.

4A and 4B show a state in which the pointer 44 of the operation handle 43 is operated to the N (neutral) position (see FIG. 2). In this case, the oil in the oil feed pump 9 is the discharge port 34 and the valve body. It circulates in the passage hole 36, the suction port 33 and the oil feed pump 9 so as not to apply a load to the pump, while the left side port 31 on the bottom valve side and the right side port 32 on the opening / closing cock side are in the neutral position. At this time, the fluid is communicated through the gap 45. Therefore, unless the opening / closing cock 7 is closed, the oil in the tank 1 can be naturally discharged through the gap 45, and the opening / closing cock 7 is opened / closed. By doing so, the emission amount can be adjusted and stopped.

The present invention is a switching valve 6 provided with the above-mentioned spontaneous discharge gap 45.
Is provided at the rear end portion of the tank 1, and when the oil in each oil chamber of the tank 1 is naturally discharged to the outside, the common oil supply pipes 5 and 8 and the rear end portion thereof are provided. It is possible to reliably discharge the oil via the gap 45 of the switching valve 6. In this case, if the switching valve has a structure in which no gap for natural discharge is provided, an oil supply pipe for natural discharge must be provided in parallel with this switching valve.
Also, even if a switching valve provided with a natural discharge circuit is provided in the oil supply pipe, if it is provided midway in the longitudinal direction of the tank,
In order to naturally discharge the oil in each oil chamber, a switching valve must be provided for each oil chamber.

5A and 5B, the pointer 44 of the operation handle 43 is D (drain).
The oil which has flowed in from the left port 31 is sucked into the oil feed pump 9 from the suction port 33 through the passage hole 36, and is discharged from the discharge port 34 directly connected to the discharge port 9b. The oil thus discharged is sent out from the right port 32 to the sending pipe 8 on the opening / closing cock side through the gap 46, and the opening / closing cock 7
By opening the, the oil is forced to flow outside. In this case, when the opening / closing cock 7 is closed, an overload is applied to the discharge port 34 side, and this overpressure pushes the valve body 41 of the pressure regulating valve 37 open against the spring 42, and the oil on the discharge port side is It reflows into the suction port 33 through the valve hole 39 and circulates in the oil feed pump 9 to prevent damage to the switching valve 6, the oil feed pipe 8 and the oil feed pump 9.

6A and 6B show a state in which the pointer 44 of the operation handle 43 is rotated to the S (supply) position, and the oil that has flowed into the right side port 32 from the outside passes through the passage hole 36 and the suction port 33.
The oil sucked into the oil feed pump 9 and discharged from the discharge port 34 directly connected to the discharge port is sent through the gap 47 from the left port 31 to the oil feed pipe 5 on the bottom valve side, and the oil feed pipe 5
The oil inside will be filled in the tank 1 through each bottom valve 3.

As shown in FIG. 2, the intake / exhaust port 49 of the opening / closing cock 7 can be closed by a cap 50.
The cap 50 is removed, and the L-shaped take-out pipe 51 can be locked to the intake / exhaust port 49 with a screw 52 such that the take-out port 52 is oriented in either the front or rear direction.

(Effect) According to the present invention, the tank bottom is provided with a slight downward slope from the front to the rear, and the oil feed pipe is arranged along the inclined tank bottom, and the tank bottom is provided with the downward slope. Since a plurality of bottom valves provided are connected in series by oil feed pipes, oil inside each oil chamber of the tank and oil feed pipes can be reliably discharged without remaining, and a switching valve for the oil feed pipes By connecting the open and close cocks in series, oil supply can be stopped, forced oil supply direction can be switched, and damage due to overload can be prevented at once, and since the oil transfer pump is directly connected to the switching valve, There is an advantage that it is possible to fulfill the oil supply / drainage oil feeding function in the tank lorry by almost one series piping path without the need for complicated piping as in the conventional case, and the installation cost can be markedly reduced.

Further, since the switching valve, the opening / closing cock, and the oil feed pump are installed centrally at the rear end of the tank, the operation of the switching valve and the opening / closing cock and the extraction pipe for the intake / exhaust port of the opening / closing cock are performed. Detachment can be done intensively from the rear of the tank, and oil loading and unloading work can be performed quickly, and repair and management of the above-mentioned switching valve, open / close cock or oil pump etc. can also be done at the rear of the tank. You can do it intensively.

Further, since the switching valve communicates the tank-side oil feeding pipe with the opening / closing cock-side oil feeding pipe when the switching valve is in the neutral position, a natural draining oil feeding pipe is separately provided as in the conventional case. There is no need to provide it, and from this aspect, there is a practical advantage that the installation cost of the oil feeding pipe can be significantly reduced.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment of the present invention, FIG. 2 is a perspective view of the same, FIG. 3 is a longitudinal sectional front view of the same part, and FIGS.
Figures A and B are a vertical sectional front view and a vertical sectional side view of the other main part,
It is a figure which shows each operating state. 1 ... Tank, 2 ... Tank bottom, 3 ... Bottom valve, 4 ...
Emergency shutoff valve, 5 ... Oil supply pipe, 6 ... 4-port 3-position switching valve, 7 ... Opening cock, 8 ... Oil supply pipe, 9 ... Oil supply pump, 37 ... Pressure adjusting valve, 45 ... Gap.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References SHO 58-167370 (JP, U) ACT 48-44505 (JP, U) ACT 57-5233 (JP, U) ACT 53- 4499 (JP, Y2)

Claims (1)

[Scope of utility model registration request] 1. A tank lorry having a tank interior divided into a plurality of oil chambers, each of which is provided with a bottom valve and an emergency shutoff valve at appropriate intervals in the longitudinal direction. In an oil feeding device having an oil feeding pipe attached thereto, a tank bottom is provided with a slight downward slope from the front to the rear, and the oil feeding pipe is arranged along the inclined tank bottom, and the oil feeding pipe is provided. An opening / closing cock is provided at the end of the tank, and a switching valve is connected in series between the tank side oil feeding pipe and the opening / closing cock side oil feeding pipe at the rear end of the tank, and the switching valve is directly connected to the oil feeding pump. A forced discharge position for forcibly discharging oil from the tank side oil supply pipe to the opening / closing cock side oil supply pipe, a forced inflow position for forcibly flowing oil from the opening / closing cock side oil supply pipe to the tank side oil supply pipe, and the oil supply pump The oil circulates inside It switched on and Toraru position 4
It has a function of a port 3 position switching valve, and the switching valve is in a neutral state when the forced discharge inflow passage is overloaded at the forced discharge position and the forced inflow position. An oil feeding device in a tank truck, wherein the switching valve communicates the tank-side oil feeding pipe with the opening / closing cock-side oil feeding pipe when in the neutral position.