CN2425238Y

CN2425238Y - Overfill-limiting valve for liquefied petroleum gas steel cylinder

Info

Publication number: CN2425238Y
Application number: CN 00208674
Authority: CN
Inventors: 张良奇
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-05-09
Filing date: 2000-05-09
Publication date: 2001-03-28
Anticipated expiration: 2010-05-09

Abstract

The utility model discloses an overfill-limiting valve for a liquefied petroleum gas steel cylinder, which is arranged on the internal chamber of the steel cylinder and is connected to the tail portion of a cylinder valve. The overfill-limiting valve for a liquefied petroleum gas steel cylinder is composed of a connecting seat, a yoke, a piston, a pressure spring, a shutter, a sealing ring, and a floater. The connecting seat is connected with the yoke, and a hollow chamber can be formed. The piston is sheathed with the sealing ring and is assembled on the upper part of the hollow chamber in a sliding mode; the shutter is movably arranged on the lower part of the hollow chamber through the sealing ring, and the pressure spring is arranged between the piston and the shutter, and the lower end of the shutter extends the lower part of the fork and is contacted and matched with a cam surface of the floater which is hinged on the lower part of the fork. The overfill-limiting valve for a liquefied petroleum gas steel cylinder with the structure can accurately and quantitatively charge the liquefied petroleum gas and can limit the excess charging of the steel cylinder, and accordingly, the use safety of the steel cylinder can be ensured.

Description

The excessive overfill-limiting valve of liquefied petroleum ga steel cylinder

The technical field that excessive limit was filled when the utility model related to the liquefied petroleum ga steel cylinder inflation.

The liquefied petroleum ga steel cylinder that domestic production is at present used does not all assemble excessive overfill-limiting valve.When the steel cylinder liquefied petroleum gas filling, only depend on artificial control, can not reflect the metering of the liquefied petroleum gas (LPG) that fills exactly, thereby the phenomenon of few dress or overfilling occur, and excessive filling will make steel cylinder have unsafe hidden danger.Particularly liquefied petroleum gas (LPG) fills and clearly stipulates in the transport regulations to forbid the liquid filling weight to surpass 80% of container capacity, in fact the explosive accident that causes of overfilling is quite a few, therefore limits overfilling with regard to the problem that becomes the common care of people and the requirement of government.

The purpose of this utility model overcomes the deficiency of above-mentioned prior art just, and a kind of excessive overfill-limiting valve of steel cylinder that can accurately quantitatively fill liquefied petroleum gas (LPG) is provided, the overfilling of restriction steel cylinder, thus guaranteed the Security that steel cylinder uses.

The purpose of this utility model is achieved by the following technical solution: the excessive overfill-limiting valve of liquefied petroleum ga steel cylinder, be loaded on steel cylinder intracavity and be connected in the cylinder valve afterbody, form by connecting base, crotch, piston, stage clip, valve, seal ring, float, connecting base and crotch are connected to form a cavity, piston sleeve is connected to seal ring and slidable fit in cavity top, valve is loaded on the cavity bottom through the seal ring activity, between piston and the valve stage clip is housed; The valve lower end stretch out the crotch bottom and with the camming surface contact matching of the float that is articulated in crotch below.Change the camming surface of float and the contact position of valve by moving up and down of float, thereby open or close pore, play and molten steel liquefied oil gas amount is carried out quantitative limit fill.

Below in conjunction with drawings and Examples structure of the present utility model and advantage are described further.

Fig. 1 is a scheme of installation of the present utility model;

Fig. 2 is the structural representation of the utility model inflated condition;

Fig. 3 is the structural representation that the utility model limit is filled state.

Referring to Fig. 1-Fig. 3, present embodiment comprises connecting base 1, piston 2, stage clip 6, crotch 7, valve 9, float 11, is placed in the steel cylinder.Piston 2, valve 9 and " O " RunddichtringO 3,4,8, " Y " RunddichtringO 5, stage clip 6 are housed in connecting base 1 and the crotch 7, float 11 ends are by pin 10 and crotch 7 lower hinge, and form a camming surface 12, the convex surface and the concave surface that seamlessly transit are arranged on the camming surface 12.

This valve connects with the valve bottom of steel cylinder by the tapered thread of connecting base 1, places in the steel cylinder.During empty bottle, float 11 is in extreme lower position, and the convex surface of float 11 front end camming surfaces 12 contacts with valve 9, and with valve 9 jack-up upwards, the duct, bottom of crotch 7 is opened.When filling liquid gas, high pressure air is entered by the upper hole of connecting base 1, and this moment, piston 2 moved down at upper pressure lower compression stage clip 6 owing to there is upper and lower pressure difference, pore 13 on connecting base 1 sidewall is communicated with inflation inlet inflates.Along with the increase that charges into liquid gas in the steel cylinder, liquid level rises, float 11 floats gradually, and camming surface 12 is rotated, when reaching specified tolerance, this moment, float 11 was in the extreme higher position, valve 9 is fallen the concave surface place of float 11 end cams faces 12, valve 9 moves down, block the duct of crotch 7 bottoms by seal ring 8, the high pressure petroleum gas that fills is entered in the piston 2 by piston 2 top apertures, make connecting base 1, crotch 7, valve 9, seal ring 5, gas pressure in 8 spaces of forming increases, reach balance with the pressure of inflation inlet and offset, 2 in piston moves up under the elastic force effect of stage clip 6, stops up the passage of suction port and sidewall pore 13, thereby restriction continues to fill liquid gas.

By using excessive overfill-limiting valve, when being filled, liquefied petroleum ga steel cylinder is controlled in the safe rated capacity scope, improve the correct metering and the safety coefficient of liquefied petroleum ga steel cylinder capacity, assure the safety for life and property of the people.

Claims

1, the excessive overfill-limiting valve of liquefied petroleum ga steel cylinder, be loaded on steel cylinder intracavity and be connected in the cylinder valve afterbody, it is characterized in that: form by connecting base, crotch, piston, stage clip, valve, seal ring, float, connecting base and crotch are connected to form a cavity, piston sleeve is connected to seal ring and slidable fit in cavity top, valve is loaded on the cavity bottom through the seal ring activity, between piston and the valve stage clip is housed; The valve lower end stretch out the crotch bottom and with the camming surface contact matching of the float that is articulated in crotch below.

2, excessive overfill-limiting valve according to claim 1 is characterized in that connecting base and crotch have cavity volume, and two cavity volumes connect into the cavity that allows piston, valve move up and down; Have the pore that is communicated with cavity volume on the connecting base, can open or close pore when piston moves up and down.

3, excessive overfill-limiting valve according to claim 1 and 2 is characterized in that piston is hollow tubular, is socketed with " O " type and " Y " RunddichtringO on its outer wall respectively, and its top also has the aperture that is communicated with up and down.