CN2530117Y

CN2530117Y - Gas compressor governor

Info

Publication number: CN2530117Y
Application number: CN 02221735
Authority: CN
Inventors: 杨叶
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-03-04
Filing date: 2002-03-04
Publication date: 2003-01-08
Anticipated expiration: 2012-03-04

Abstract

The utility model provides a gas pressure regulator, comprising a lower valve cap, a throttle sleeve barrel, a valve rod, a valve core and an air cavity body connected with a valve body and a direct valve communicated with the air cavity body. A soft seal is composed of a wear-resistant alloy body inserted on a top end of the valve core and a seal ring inserted at a bottom of the valve seat ring, a hard seal is formed of a frustum surface at a site opposite to a bottom corner of the valve seat ring in a cavity at the top of the valve core and the bottom corner of the valve seat ring and a sealing system consists of the hard seal and the soft seal, so as to ensure the sealing performance, promote the stability, reliability, normal operating life of the gas pressure regulator greatly.

Description

Gas pressure regulator

Technical field:

The utility model relates to a kind of pressure regulator of gas medium, particularly a kind of petrochemical industry department and CNG gas station rock gas or the pressure adjusting of regeneration usefulness gas and gas pressure regulator of voltage stabilizing of being applicable to.

Background technique:

In petrochemical industry gathering line system and transmission ﹠ distribution gas field, stand and the CNG gas station, usually need pressurized gas steadily are decompressed to the low-voltage safety pressure state of setting, for producing, life provides the low-pressure gas source with steady pressure for using, for now, though realize the pressure regulating valve device of gas pressure regulation decompression number of different types are arranged, but, modal gas pressure regulation decompressor is still by command valve, air cavity and expenditure and pressure valve that convolution diaphragm is installed constitute, its working principle is to set the working pressure of command valve in advance, import compressed gas by command valve to the air cavity that convolution diaphragm is installed, promotion is installed on the valve rod control expenditure and pressure valve work of ripple film bar, realizes the steadily purpose of decompression pressure regulation.Because gas pressure regulation decompressor is to work under gas medium High Pressure Difference environment, in gas medium, can carry some foul impurity inevitably secretly, it is very serious to the erosive wear of sealed member to carry residual foul impurity during expenditure and pressure in the gas medium of high-speed motion secretly, some foul impurity also can stockpile in valve, quicken the abrasion of sealed member, cause seal failure, have a strong impact on gas pressure regulation decompressor proper functioning, this is the gas pressure regulation decompressor poor sealing performance that uses at present, the main cause that the proper functioning life-span is short, have a strong impact on transmission ﹠ distribution gas field, stand and CNG gas station proper functioning, increased transmission ﹠ distribution gas field greatly, stand and CNG gas station maintenance management cost.

Summary of the invention:

The utility model be propose on the basis of existing technology a kind of simple in structure, erosive wear resistance is strong, has the reliable sealing service behaviour, pressure regulation decompression stable work in work and the long gas pressure regulator of useful working life, it is achieved by the following technical solution: it is mainly by the bottom flange that is connected in valve body, air cavity and the command valve that is connected with air cavity constitute, device is done the throttle sleeve in expenditure and pressure hole in valve body, in throttle sleeve, be fitted with seat ring and the spool of doing the balance through hole, the balance through hole is connected the bottom flange inner chamber with the ring cavity of seat ring, spool is moved up and down freely, air cavity is divided into upper gas chamber and lower chamber by convolution diaphragm, the valve rod that is fixedly connected on the ripple film bar passes the seat ring overhead in the cavity at spool top, be installed on the interior spring overhead of bottom flange in the bottom of spool, the seat ring bottom that it is characterized in that being fitted in the throttle sleeve is embedded with seal ring, seal ring is embedded in the seat ring bottom, away from the expenditure and pressure hole, can avoid the direct erosive wear seal ring of gas medium of high-speed motion, the top of spool top cavity is inlaid with the abrasion resistance alloy body, improve erosion resistance effectively, abrasion resistance properties, in the cavity of spool top, done the frustum face with the corresponding section, position at angle, seat ring base, the frustum face of spool and angle, seat ring base constitute hard sealing structure, when closing, spring in the bottom flange is with the spool jack-up that makes progress, frustum face in the cavity of spool top is adjacent to seals angle, seat ring base formation hard sealing structure, simultaneously, the abrasion resistance alloy body of the top insert of spool top cavity also tightly withstands the seal ring that is flush-mounted in the seat ring bottom and constitutes soft sealing structure, can guarantee its sealability by the sealing system that hard sealing and soft seal are formed, improve the proper functioning life-span of gas pressure regulator widely.

Description of drawings:

Fig. 1 is structural representation of the present utility model (closed condition);

Fig. 2 is the local enlarged diagram (expenditure and pressure working state) of the utility model;

Fig. 3 is the part figure of spool.

Embodiment:

The gas pressure regulator that the utility model proposes, it is mainly by the bottom flange 16 that is connected in valve body 1, air cavity 2 and the command valve 4 that is connected with air cavity 2 constitute, the high-pressure air pipe 3 that is communicated in command valve 4 communicates with the high pressure pipe line source of the gas of the high-pressure inlet 19 that is connected in valve body 1, the muffler 8 of air cavity 2 communicates with the pipeline of the low tension outlet 12 that is connected in valve body 1, device is done the throttle sleeve 17 in expenditure and pressure hole 18 in valve body 1, in throttle sleeve 17, be fitted with seat ring 11 and the spool 13 of doing balance through hole 21, balance through hole 21 is connected bottom flange 16 inner chambers with the ring cavity of seat ring 11, spool 13 is moved up and down freely, convolution diaphragm 6 is installed in the air cavity 2, convolution diaphragm 6 is divided into upper gas chamber 5 and lower chamber 7 with air cavity 2, the valve rod 10 that is fixedly connected on ripple film bar 9 passes seat ring 11 overheads in the cavity 24 at spool 13 tops, be installed on spring 15 overheads in the bottom flange 16 in the bottom of spool 13, seat ring 11 bottoms that are fitted in the throttle sleeve 17 are embedded with seal ring 14, seal ring 14 is seat ring 11 bottoms that are embedded in away from the expenditure and pressure hole 18 of throttle sleeve 17, can avoid the direct erosion seal ring 14 of gas medium of high-speed motion, the top of spool 13 top cavitys 24 is inlaid with abrasion resistance alloy body 22, can improve erosion resistance effectively, abrasion resistance properties, in spool 13 top cavitys 24, done frustum face 23 with the corresponding section, position at angle, seat ring 11 base 20, the frustum face 23 of spool 13 constitutes hard sealing structure with angle, seat ring 11 base 20, the abrasion resistance alloy body 22 that inlay on the top of spool 13 top cavitys 24 constitutes soft sealing structure with seal ring 14, during work, set the working pressure of command valve 4 earlier, by the upper gas chamber 5 input compressed gas of command valve 4 to air cavity 2, the valve rod 10 that promotion is installed on ripple film bar 9 moves down, the valve rod 10 of overhead in spool 13 cavitys 24 promotes spool 13 downwards, spring 15 in the bottom flange 16 is compressed, open the expenditure and pressure hole 18 of throttle sleeve 17, pressurized gas are by the expenditure and pressure hole 18 of high-pressure inlet 19 through throttle sleeve 17, the ring cavity of seat ring 11, export low-pressure gases by the low tension outlet 12 of valve body 1 again, realize the steadily purpose of decompression pressure regulation, when closing, by the spring 15 in the bottom flange 16 with spool 13 jack-up upwards, frustum face 23 in the spool 13 top cavitys 24 is adjacent to seals angle, seat ring 11 base 20 formation hard sealing structures, simultaneously, the abrasion resistance alloy body 22 of the top insert of spool 13 top cavitys 24 also tightly withstands the seal ring 14 that is flush-mounted in seat ring 11 bottoms and constitutes soft sealing structure, can guarantee its sealability by the sealing system that hard sealing and soft seal are formed, improve the stability of gas pressure regulator widely, reliability and proper functioning life-span.

Claims

1. gas pressure regulator, it is mainly by the bottom flange that is connected in valve body (1) (16), air cavity (2) and the command valve (4) that is connected with air cavity (2) constitute, device is done the throttle sleeve (17) of expenditure and pressure hole (18) in valve body (1), in throttle sleeve (17), be fitted with seat ring (11) and do the spool (13) of balance through hole (21), air cavity (2) is divided into upper gas chamber (5) and lower chamber (7) by convolution diaphragm (6), the valve rod (10) that is fixedly connected on ripple film bar (9) passes seat ring (11) overhead in the cavity (24) at spool (13) top, be installed on interior spring (15) overhead of bottom flange (16) in the bottom of spool (13), seat ring (11) bottom that it is characterized in that being fitted in the throttle sleeve (17) is embedded with seal ring (14), the top of spool (13) top cavity (24) is inlaid with abrasion resistance alloy body (22), has done frustum face (23) with the corresponding section, position at seat ring (11) angle, base (20) in spool (13) top cavity (24).