JPH066074Y2 - Bottom loading device for tank truck - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a bottom loading device for a tank truck. More specifically, the present invention relates to a tank lorry bottom loading device equipped with a relief valve at the top of a tank for loading liquid into the tank main body by supplying liquid from the bottom valve of the tank main body and discharging vapor gas generated at the same time to the outside. is there.

[Conventional technology]

Bottom of a tank truck having a bottom valve for opening and closing a supply / discharge opening for liquid supply / discharge provided in the lower part of the tank body, and a relief valve for opening / closing an exhaust opening hole for gas discharge provided in the upper part of the tank body Regarding the loading device, JP-A-58-90097 and JP-A-57-163.
No. 789.

[Problems to be solved by the device]

In a tank truck equipped with a bottom loading device, the liquid pressurized by the power of a pump, etc. flows through the piping communicating with the supply / discharge opening in the lower part of the tank main body and passes through the supply / discharge opening into the tank main body. It is supposed to flow in.

However, if the inflow pressure is too high or the tank body has a small internal volume like a 2 KL tank, the liquid of the bottom valve member rises to the upper part of the tank body and does not calm down, and it is provided on the upper part of the tank body. There was a risk of liquid entering the relief valve.

In order to prevent this, a rectifying plate was installed around the bottom valve to distribute the liquid flow.However, in a small tank truck, the liquid may travel along the inner wall surface of the tank body and enter the relief valve. It was

An object of the present invention is to prevent the liquid from entering the relief valve in the upper portion of the tank body while the bottom valve in the lower portion of the tank body is opened to supply the liquid from the supply / discharge opening hole.

[Means for Solving the Problems]

The tank lorry bottom loading device of the present invention has a liquid supply / discharge opening formed in the lower part of the tank body and an exhaust opening formed in the upper part of the tank body for discharging gas. Facing each other. The bottom valve that opens and closes the supply / discharge opening hole and the relief valve that opens the exhaust opening hole are connected by a rod. When the rod is raised, the bottom valve and the relief valve are opened.
The rod is provided with a wave blocking member which approaches the exhaust opening when the bottom valve is opened.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view of the bottom loading device showing a state where the bottom valve is closed, and FIG. 2 is a sectional view of the bottom loading device showing a state where the bottom valve is opened.

In the illustrated tank lorry bottom loading device, a supply / discharge opening 12 for liquid supply / discharge is formed in the lower portion 11 of the tank body 10, and a flange 14 for protecting the supply / discharge opening 12 is provided in the lower portion 11. ing. A pipe 15 having a communication passage 20 inside is connected to a lower portion of the flange 14, and the tank body 10 is connected via the pipe 15.
The liquid is supplied to the inside and the liquid in the tank body 10 is discharged.

A support frame 18 is provided inside the flange 14,
The bottom valve mechanism 16 is supported by the support frame 18 and is vertically movable.
Is installed. This bottom valve mechanism 16 is a bottom valve that is attached to a valve rod 28 and opens and closes the supply / discharge opening hole 12, that is, the valve body 2.
4, a spring member 26 that applies a spring force in the closing direction to the valve body 24, and an actuating rod 22 that opens the valve body 24 against the spring force of the spring member 26. For the detailed structure of the bottom valve mechanism 16, see JP-A-58-9.
It is also shown in Japanese Patent Laid-Open No. 0097, and since it is a known structure, its detailed description is omitted.

An exhaust opening 29 for discharging evaporative gas is formed in the upper portion 13 of the tank body 10, and an exhaust pipe 33 having a communication passage 32 communicating with the exhaust opening 29 is connected to the upper portion 13 of the tank. Evaporated gas in the main body 10 is exhausted to the outside through the exhaust pipe 33.

A relief valve mechanism 30 is provided on the upper portion 13,
The relief valve mechanism 30 includes a relief valve or valve element 36 attached to a valve rod 34 for opening and closing the exhaust opening 29.
There is a spring member 40 that applies a spring force to the valve element 36 in the direction of closing the exhaust opening hole 29.

The valve body 24 of the bottom valve mechanism 16 and the valve body 3 of the relief valve mechanism 30.
A connecting rod 38 is attached to the valve rods 28 and 34 which are integrated with the respective valve bodies 24 and 36 in order to connect the valve rods 6 and 6.

The wave-blocking member 42 is formed by a donut-shaped wave-blocking plate 44 having a hole in the center and a cylindrical body 46 that hangs downward from the center hole of the wave-blocking plate 44. The tubular body 46 is attached to the upper end of the connecting rod 38.

The wave preventing member 42 is attached to the connecting rod 38 by screwing the tubular body 46 into the screw 39 formed on the upper end of the connecting rod 38. Therefore, by rotating the wave blocking member 42, the vertical position of the wave blocking plate 44 can be adjusted.

In the tank lorry bottom loading device having such a configuration, when the liquid is supplied into the tank body 10, the valve rod 24 of the bottom valve mechanism 16 is lifted by the operating rod 22 to open the supply / discharge opening hole 12. Open.

As a result, the valve rod 36 of the relief valve mechanism 30 opens the exhaust opening hole 29 in association with the valve body 24 by the connecting rod 38, and the corrugated plate 44 also approaches the exhaust opening hole 29.

In this state, when the liquid is pumped from the communication passage 20 in the lower portion 11 of the tank body 10, the liquid rises or the tank body 1
0 through the inner surface of the exhaust valve opening 29 of the relief valve mechanism 30
However, the liquid is blocked by the corrugated plate 44 and the liquid flows into the communication passage 3
Do not penetrate into 2.

The axial movement stroke of the connecting rod 38 changes depending on the opening degree of the valve body 24. Therefore, if the opening degree of the valve body 24 is changed, the type of liquid supplied into the tank body 10 and the capacity of the tank body 10 can be changed. It is also possible to adjust the gap between the wave shelter plate 44 and the exhaust opening hole 29 by the amount of pressure feed.

The bottom valve mechanism 16 and the relief valve mechanism 30 are also set to the open state when the liquid in the tank body 10 is discharged to the outside.

It is needless to say that the present invention is not limited to the illustrated embodiments and can be variously modified without departing from the gist thereof.

[Effect of device]

(1). When supplying the liquid into the tank body, if the bottom valve is set to the open state, the rod that links the opening / closing movement of the bottom valve with the opening / closing movement of the relief valve is provided with a wave shelter member that approaches the exhaust opening hole. Therefore, even if the liquid pumped into the tank body rises or approaches the exhaust opening hole along the inner surface of the tank body, the liquid is prevented from entering the exhaust opening hole.

(2). If the opening degree of the bottom valve is increased to increase the amount of liquid to be pumped, the wave blocking member comes closer to the exhaust opening hole. Is surely prevented.

[Brief description of drawings]

FIG. 1 is a sectional view showing a closed state of a bottom valve in a tank lorry bodom loading apparatus according to an embodiment of the present invention, and FIG. 2 is a sectional view showing a bottom valve opened state of the apparatus shown in FIG. 10 ... Tank main body, 11 ... Lower part, 12 ... Supply / drain opening hole, 13 ... Upper part, 14 ... Flange, 15 ... Piping, 16 ... Bottom valve mechanism, 18 ... Support frame, 20 ... Communication passage, 22 ... actuating rod, 24 ... valve element, 26 ... spring member, 28 ... valve rod, 29 ... exhaust opening hole, 30 ... relief valve mechanism, 32 ... communication passage, 33 ... Exhaust pipe, 34 ... Valve rod, 36 ... Valve body, 38 ... Connecting rod, 39 ... Screw, 40 ... Spring member, 42 ... Wave blocking member, 44 ... Wave blocking plate, 46 ... … Cylinder.

Claims (2)

[Scope of utility model registration request] 1. A supply / discharge opening hole for supplying / discharging a liquid is formed in a lower portion of a tank body, and an exhaust opening hole for discharging a gas is formed in an upper portion of the tank body so as to face the supply / discharge opening hole. When a bottom valve that opens and closes the supply / discharge opening hole and a relief valve that opens and closes the exhaust opening hole are connected by a rod, and the bottom valve is opened against the spring force biased in the direction of closing the bottom valve, A bottom loading device for a tank truck, wherein the rod is provided with a wave blocking member that approaches the exhaust opening. 2. The bottom loading device for a tank truck according to claim 1, wherein a distance between the exhaust opening for discharging gas and the corrugated member can be adjusted.