CN203568259U

CN203568259U - Pneumatic compressed natural gas cylinder valve

Info

Publication number: CN203568259U
Application number: CN201320794189.7U
Authority: CN
Inventors: 沈云奇; 翁国栋; 朱成
Original assignee: NINGBO SUNAN VALVE MANUFACTURE CO Ltd
Current assignee: NINGBO SUNAN VALVE MANUFACTURE CO Ltd
Priority date: 2013-12-04
Filing date: 2013-12-04
Publication date: 2014-04-30
Anticipated expiration: 2023-12-04

Abstract

The utility model discloses a pneumatic compressed natural gas cylinder valve, which comprises a valve body (1), a large spool assembly, a small spool assembly and an end cap (4), wherein the large spool assembly and the valve body (1) form a first valve, and the small spool assembly and the large spool assembly form a second valve; the small spool assembly comprises a small spool (6) and an O-shaped seal ring (7), and a valve cavity (3) is arranged in a large spool (2) in the large spool assembly; the O-shaped seal ring (7) is embedded at the bottom of the valve cavity (3), and the small spool (6) is slidably matched in the valve cavity (3) and forms the second valve with the O-shaped seal ring (7). After such structure is adopted, the number of parts of the small spool assembly is reduced, and the small spool assembly only comprises the small spool and the O-shaped seal ring, therefore, on the one hand, the production cost of a finished product is reduced, on the other hand, the production and assembly process is relatively simple, and the production efficiency is greatly improved.

Description

Pneumatic compression natural gas bottle valve

Technical field

The utility model relates to the technical field of valve, is specifically a kind of for collecting the control inflation on the single steel cylinder of dress case system and the pneumatic compression natural gas bottle valve of exitting.

Background technology

Pneumatic compression natural gas bottle valve is the by-pass valve control of start-stop system when single air cylinder is as inflation and venting in collection dress case system.The pneumatic compression natural gas bottle valve of prior art, as shown in accompanying drawing 1 and accompanying drawing 2, it comprises inflation pressure cap 01, piston component 02, push rod 03, big valve core assembly 04, small valve core assembly 05, valve assembly 06 and valve body 07; Big valve core assembly 04, small valve core assembly 05 and valve assembly 06 are all positioned at valve body 07, inflation pressure cap 01 is connected on valve body 07, piston component 02 is slidably connected in inflation pressure cap 01 and is connected with big valve core assembly 04 by push rod 03, small valve core assembly 05 is positioned at big valve core assembly 04, big valve core assembly 04 forms the first valve with valve body 07, small valve core assembly 05 forms the second valve with big valve core assembly 04, and valve assembly 06 forms valve with valve body 07.

The principle of work of above-mentioned pneumatic compression natural gas bottle valve is as follows: under normal circumstances, valve is often opened; During work, open the pneumatic inflatable device being connected with inflation pressure cap 01, make piston component 02 promote push rod 03 and move right, until move right together with pushing against and make valve rod drive small valve core assembly 05 with the valve rod in small valve core assembly 05, the second valve open; Now, under the effect of gas interior difference of pressure, drive big valve core assembly 04 also to move right, by the first valve open.Otherwise, close pneumatic inflatable device, pressure on piston component 02 disappears, valve inner gas is in the situation that pressure is the same, on small valve core assembly 05, compressed spring produces reset response, small valve core assembly 05 is promoted left, until close the second valve, promote again subsequently big valve core assembly 04 and be moved to the left, until close the first valve.

But there is following shortcoming in the pneumatic compression natural gas bottle valve of above-mentioned this structure:

1) because small valve core component part is more, comprise small valve core 09, small valve-rod 011 and O RunddichtringO 012, the productive costs of finished product increases on the one hand, produces on the other hand and fitting process complexity, greatly reduces production efficiency;

2) in addition, between the small valve core assembly at the second valve place and big valve core 08, by O RunddichtringO 012, form, and being fillet 013, the big valve core 08 at this valve place contacts with O RunddichtringO 012, therefore, contact easily makes O RunddichtringO 012 produce breakage with disengagement frequently, thereby cause second valve valve blow-by, like this, have potential safety hazard.

Utility model content

Technical problem to be solved in the utility model is a kind of good seal performance to be provided, thereby to avoid the pneumatic compression natural gas bottle valve of potential safety hazard.

For solving the problems of the technologies described above, the pneumatic compression natural gas bottle valve that the utility model provides, comprise valve body, big valve core assembly, small valve core assembly and end cap, described big valve core assembly is positioned at valve body, small valve core assembly is positioned at big valve core assembly and is connected with end cap by spring, and end cap is connected in valve body; 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; Described small valve core assembly comprises small valve core and O RunddichtringO, in the big valve core in big valve core assembly, has valve pocket, and O RunddichtringO is embedded in the bottom of valve pocket, and small valve core is slidably fitted in valve pocket and forms the second valve with O RunddichtringO.

The contact surface of described small valve core and O RunddichtringO is circular conical surface.

Adopt after above structure, the utility model compared with prior art, has the following advantages:

1) because the part of small valve core assembly reduces, just comprise small valve core and O RunddichtringO, therefore, reduce on the one hand the productive costs of finished product, production is relative with fitting process simple on the other hand, greatly enhances productivity;

2) in addition, the second valve that existing fillet and O RunddichtringO are formed, replaces with second valve that contacts formation of O RunddichtringO with circular conical surface, thus assurance O RunddichtringO good airproof performance in use, and increase the service life.

Accompanying drawing explanation

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

Fig. 2 is the structure for amplifying schematic diagram of A portion in Fig. 1.

Fig. 3 is the local structure schematic diagram of the utility model pneumatic compression natural gas bottle valve.

Wherein:

In prior art: 01, inflation pressure cap; 02, piston component; 03, push rod; 04, big valve core assembly; 05, small valve core assembly; 06, valve assembly; 07, valve body; 08, big valve core; 09, small valve core; 010, spring; 011, small valve-rod; 012, O RunddichtringO; 013, fillet;

The utility model: 1, valve body; 2, big valve core; 3, valve pocket; 4, end cap; 5, spring; 6, small valve core; 7, O RunddichtringO; 8, circular conical surface.

The specific embodiment

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

The structural representation of the utility model pneumatic compression natural gas bottle valve is as shown in Figure 3 known, it comprises valve body 1, big valve core assembly, small valve core assembly and end cap 4, described big valve core assembly is positioned at valve body 1, small valve core assembly is positioned at big valve core assembly and is connected with end cap 4 by spring 5, and end cap 4 is connected in valve body 1.Big valve core assembly and valve body 1 form the first valve, and small valve core assembly and big valve core assembly form the second valve.Described small valve core assembly comprises small valve core 6 and O RunddichtringO 7, in the big valve core 2 in big valve core assembly, has valve pocket 3, and O RunddichtringO 7 is embedded in the bottom of valve pocket 3, and small valve core 6 is slidably fitted in valve pocket 3 and forms the second valve with O RunddichtringO 7.

Described small valve core 6 is circular conical surface 8 with the contact surface of O RunddichtringO 7.

Working process of the present utility model is as follows: under normal circumstances, valve is often opened; During work, open the pneumatic inflatable device being connected with inflation pressure cap, make piston component promote push rod and move right, until move right together with pushing against and drive small valve core 6 with the small valve core 6 in small valve core assembly, the second valve open; Now, under the effect of gas interior difference of pressure, drive the big valve core 2 in big valve core assembly also to move right, by the first valve open.Otherwise, close pneumatic inflatable device, pressure on piston component disappears, valve body 1 internal gas is in the situation that pressure is the same, in small valve core assembly, compressed spring 5 produces reset response, small valve core 6 is promoted left, thereby close the second valve until circular conical surface 8 and O RunddichtringO 7 push against, promote again subsequently big valve core 2 and be moved to the left, until close the first valve.

Claims

1. a pneumatic compression natural gas bottle valve, comprise valve body (1), big valve core assembly, small valve core assembly and end cap (4), described big valve core assembly is positioned at valve body (1), small valve core assembly is positioned at big valve core assembly and is connected with end cap (4) by spring (5), and end cap (4) is connected in valve body (1); Big valve core assembly and valve body (1) form the first valve, and small valve core assembly and big valve core assembly form the second valve; It is characterized in that: described small valve core assembly comprises small valve core (6) and O RunddichtringO (7), in big valve core (2) in big valve core assembly, there is valve pocket (3), O RunddichtringO (7) is embedded in the bottom of valve pocket (3), and small valve core (6) is slidably fitted in valve pocket (3) and with O RunddichtringO (7) and forms the second valve.

2. pneumatic compression natural gas bottle valve according to claim 1, is characterized in that: described small valve core (6) is circular conical surface (8) with the contact surface of O RunddichtringO (7).