CN203309154U

CN203309154U - Pneumatic natural gas bottle valve

Info

Publication number: CN203309154U
Application number: CN201320380385XU
Authority: CN
Inventors: 沈云奇; 朱成; 翁国栋
Original assignee: NINGBO SUNAN VALVE MANUFACTURE CO Ltd
Current assignee: NINGBO SUNAN VALVE MANUFACTURE CO Ltd
Priority date: 2013-06-28
Filing date: 2013-06-28
Publication date: 2013-11-27
Anticipated expiration: 2023-06-28

Abstract

The utility model discloses a pneumatic natural gas bottle valve. The pneumatic natural gas bottle valve comprises a valve body (12), a piston component (1), a large valve core component and a small valve core component; the piston component (1) and the large valve core component are both installed in the valve body (12); the small valve core component is connected into the large valve core component; the small valve core component and the piston component (1) are connected through an ejection rod (2); the large valve core component and the valve body (12) form a first valve, and the small valve core component and the large valve core component form a second valve; the contact surface of the valve body (12) at the first valve is a conical surface (4), and the large valve core component and the conical surface (4) form conical surface seal; the end surface of a large valve core (6) in the large valve core component at the second valve is provided with a seal groove (10); the side wall of the seal groove (10) is a circular arc surface. Due to adoption of the structure, the seal effect is good, so that the system cannot leak gas no matter the system is at the high-pressure state or the low-pressure state, and the safe use of the gas bottle valve is ensured.

Description

Pneumatic natural gas bottle valve

Technical field

The utility model relates to the technical field of valve, is specifically a kind of for the pneumatic natural gas bottle valve on automobile.

Background technique

At present, along with the requirement to motor vehicle exhaust emission is more and more higher, and traditional automotive fuel is day by day in short supply, adopts rock gas more and more to receive publicity as the gas-fueled vehicles of automotive fuel.Gas-fueled vehicles, be that natural gas steel cylinder is set on car body, utilizes the natural gas compressing gas stored in steel cylinder that the automobile of power is provided to automobile, and it has advantages of that fuel cost is low, pollution emission is few.Pneumatic natural gas bottle valve is a control valve on steel cylinder.As shown in Figure 1, the pneumatic natural gas bottle valve of prior art comprises valve body 07, piston assembly 01, valve assembly 08, valve rod assembly 09 and mangetic core assembly, in valve body 07, have outlet passageway 03 and the gas-entered passageway 06 of connection, piston assembly 01, valve assembly 08, valve rod assembly 09 and mangetic core assembly are installed in valve body 07; Mangetic core assembly is combined by big valve core assembly 04 and small valve core assembly 05, and wherein big valve core assembly 04 forms the first valve with

valve body

07, and 05 of small valve core group is positioned at big valve core assembly 04, and small valve core assembly 05 forms the second valve with big valve core assembly 04; Piston assembly 01 is connected with small valve core assembly 05 by push rod 02, and valve rod assembly 09 is connected with valve assembly 08, and valve assembly 08 forms the 3rd valve with valve body 07, and generally, the 3rd valve is often opened.When automobile uses compressed natural gas, by the system command piston assembly, promote push rod and back down the small valve core assembly pushed against with it, the second valve open, then drive the action of big valve core assembly, by the first valve open.

But, there is following shortcoming in the pneumatic natural gas bottle valve of above-mentioned this structure: because the sealing at the first valve place is the end face seal that utilizes the boss formation on Sealing and valve body, the sealing at the second valve place is also the end face seal that utilizes the boss on Sealing and big valve core assembly to form, therefore, while in system, being in low-pressure state, the first valve and the second valve place exist leaks, thus the potential safety hazard of existence.

The model utility content

Technical problem to be solved in the utility model is that while providing a kind of system no matter to be in high pressure or the state of low pressure, the sealability of the first valve and the second valve is all better, thereby can not produce the compressed natural gas cylinder valve of Leakage Gas, assurance safe handling.

For solving the problems of the technologies described above, the pneumatic natural gas bottle valve that the utility model provides, comprise valve body, piston assembly, big valve core assembly and small valve core assembly, the gas-entered passageway and the outlet passageway that on described valve body, have connection, piston assembly and big valve core assembly are installed in valve body, the small valve core assembly is connected in the big valve core assembly, between small valve core assembly and piston assembly, be connected by push rod, big valve core assembly and valve body form the first valve, and small valve core assembly and big valve core assembly form the second valve; The valve body surface of contact at described the first valve place is conical surface, and big valve core assembly and conical surface form conical surface seal; Big valve core end face in the big valve core assembly at the second valve place has sealed groove, and the sidewall of described sealed groove is arc surface.

Described big valve core assembly also comprises valve core head and conical surface seal spare, and the head of valve core head is the conical head matched with conical surface, and tailing screw flight is connected in big valve core, and conical surface seal spare is embedded between valve core head and big valve core, and forms conical surface seal with conical surface.

Described small valve core assembly comprises small valve core and O type circle, and an end of O type circle is embedded in the end face of small valve core, and the other end and sealed groove form the cambered surface sealing.

After adopting above structure, the utility model compared with prior art, have the following advantages: because the sealing configuration at the first valve place changes conical surface seal into, sealing configuration at the second valve place changes the cambered surface sealing into, therefore, make the sealing effect at this two place better, make system no matter be in high pressure or the state of low pressure all can not produce the leakage of gas, thereby guarantee the safe handling of cylinder valve.

The accompanying drawing explanation

Fig. 1 is the structural representation of pneumatic natural gas bottle valve in prior art.

Fig. 2 is the structural representation of the pneumatic natural gas bottle valve of the utility model.

Wherein:

In prior art: 01, piston assembly; 02, push rod; 03, outlet passageway; 04, big valve core assembly; 05, small valve core assembly; 06, gas-entered passageway; 07, valve body; 08, valve assembly; 09, valve rod assembly;

The utility model: 1, piston assembly; 2, push rod; 3, outlet passageway; 4, conical surface; 5, conical surface seal spare; 6, big valve core; 7, O type circle; 8, small valve core; 9, valve core head; 10, sealed groove; 11, gas-entered passageway; 12, valve body.

Embodiment

Below in conjunction with the drawings and specific embodiments, the utility model is described in more detail.

Structural representation by the pneumatic natural gas bottle valve of the utility model shown in Figure 2 is as can be known, it comprises valve body 12, piston assembly 1, big valve core assembly and small valve core assembly, the gas-entered passageway 11 and the outlet passageway 3 that on described valve body 12, have connection, piston assembly 1 and big valve core assembly are installed in valve body 12, the small valve core assembly is connected in the big valve core assembly, between small valve core assembly and piston assembly 1, be connected by push rod 2, big valve core assembly and valve body 12 form the first valve, and small valve core assembly and big valve core assembly form the second valve.Valve body 12 surface of contact at described the first valve place are conical surface 4, and big valve core assembly and conical surface 4 form conical surface seal.Big valve core 6 end faces in the big valve core assembly at the second valve place have sealed groove 10, and the sidewall of described sealed groove 10 is arc surface.

Described big valve core assembly also comprises valve core head 9 and conical surface seal spare 5, the head of valve core head 9 is the conical head matched with conical surface 4, tailing screw flight is connected in big valve core 6, and conical surface seal spare 5 is embedded between valve core head 9 and big valve core 6, and forms conical surface seal with conical surface 4.

Described small valve core assembly comprises small valve core 8 and O type circle 7, and an end of O type circle 7 is embedded in the end face of small valve core 8, and the other end and sealed groove 10 form the cambered surface sealing.

Claims

1. pneumatic natural gas bottle valve, comprise valve body (12), piston assembly (1), big valve core assembly and small valve core assembly, the gas-entered passageway (11) and the outlet passageway (3) that on described valve body (12), have connection, piston assembly (1) and big valve core assembly are installed in valve body (12), the small valve core assembly is connected in the big valve core assembly, between small valve core assembly and piston assembly (1), be connected by push rod (2), big valve core assembly and valve body (12) form the first valve, and small valve core assembly and big valve core assembly form the second valve; It is characterized in that: the valve body at described the first valve place (12) surface of contact is conical surface (4), and big valve core assembly and conical surface (4) form conical surface seal; Big valve core (6) end face in the big valve core assembly at the second valve place has sealed groove (10), and the sidewall of described sealed groove (10) is arc surface.

2. pneumatic natural gas bottle valve according to claim 1, it is characterized in that: described big valve core assembly also comprises valve core head (9) and conical surface seal spare (5), the head of valve core head (9) is the conical head matched with conical surface (4), tailing screw flight is connected in big valve core (6), conical surface seal spare (5) is embedded between valve core head (9) and big valve core (6), and forms conical surface seal with conical surface (4).

3. pneumatic natural gas bottle valve according to claim 1, it is characterized in that: described small valve core assembly comprises small valve core (8) and O type circle (7), one end of O type circle (7) is embedded in the end face of small valve core (8), and the other end and sealed groove (10) form the cambered surface sealing.