Over-inflation protecting apparatus

Abstract

An excess charging protector mounted in a liquified petroleum gas pot comprises a state assembly and an on-off assembly. The state assembly has a connecting rod with a float mounted thereon. The connecting rod is hinged with a lower end cover and connects a magnetic loop support. The magnetic loop support with a builtin magnetic loop is mounted in an annular recess of the lower end cover. A valve core rod is mounted in a closedended round meshed pipe of the lower end cover. A magnetic core is mounted at the bottom of the valve core rod. The magnetic core upper plane magnetic pole has identical polarity with that of the magnetic loop. The on-off assembly barrel has a valve port pore communicated with a radial pore. There are axial inflow pores around the valve port pore. A piston cushion on a piston body mounted in lower inner cavity of the valve port pore aligns said valve port pore. Inner bores of the piston body and the barrel are sealed sliding fit. The radial pore communicated with the barrel inner cavity is in inner cavity of the piston body. The barrel underpart is rigidly coupled to the lower end cover. The state assembly applies the two-magnetism repulsion principle to act, and the action can be completed at pole momentarily, and the pole location can be converted exactly. The on-off assembly utilizes the big and small pore flow velocity pressure gradient principle of fluid, and the action is quick and reliable. It is suitable for fine accurate control, and has a good sealing effect.

Description

technical field [0001] The present invention relates to a special protection device for LPG cylinders, which is installed in LPG cylinders. Background technique [0002] All bottles used to fill flammable and explosive liquids, such as "propylene, propane" and other liquefied gases, require that the filling liquid level must not exceed a certain height, and there must be enough space on the top of the bottle to ensure safety. Because this type of liquefied gas has a high coefficient of thermal expansion, the increase in the ambient temperature can cause the pressure of the bottle to increase rapidly. If there is not enough space, it will exceed the rated strength of the bottle and cause an accident. Therefore, this type of liquefied gas is required Proper space must be reserved for gas cylinders, and most of the rapidly increasing pressure is offset by compressing the space inside the cylinder, so the space at the top of the cylinder has a direct impact on the safety of the ...

AI Technical Summary

Problems solved by technology

The opening of the valve depends on the weight of the float itself. As the liquid level drops, the float will drive the connecting rod to rotate due to gravity to lift the metal ball. Therefore, the float also needs to have a certain weight, otherwise the metal ball cannot be lifted and it cannot be opened. Valve, liquefied petroleum gas has a relatively small specific gravity and can generate very little buoyancy. When filling liquefied petroleum gas, a float with a certain weight must be lifted to close the valve. Therefore, this patent uses a metal ball The weight of the float, the weight of the float and the buoyancy received complete the action conversion of opening and closing. The conversion force is large, the reliability is poor, the conversion accuracy is poor, and the filling volume cannot be accurately controlled.

Adopt metal ball seal, the sealing surface is spherical (cone surface), easy to leak, and the sealing effect is poor

Images