CN2360684Y

CN2360684Y - Prefiltering double sealed sub-discharing valve

Info

Publication number: CN2360684Y
Application number: CN 99230906
Authority: CN
Inventors: 米力田; 黄汝桥; 黄和; 蒋理彬
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-02-04
Filing date: 1999-02-04
Publication date: 2000-01-26
Anticipated expiration: 2009-02-04

Abstract

The utility model relates to a pre-filtering double-sealing pair emptying valve which comprises a valve body, valve covers, a valve rod, a valve core, a cage-shaped valve sleeve, a valve seat, and a sealing element, wherein, the valve cover is composed of an upper valve cover positioned at the upper end of the valve body, and a lower valve cover positioned at the lower end of the valve body. A filter cartridge is installed between the lower end of the valve seat and the lower valve cover, and a double-sealing pair is arranged between the valve seat and the valve core. The sealing position and the flow throttling position of the utility model are separated, and the utility model has the advantages of favorable sealing performance, long service life, convenient operation and high safety and can prevent foreign matter from blocking and clamping the valve core. The utility model is suitable for conveying systems and devices for coal gas, natural gas, petroleum oil, and other fluid media.

Description

Pre-filtering double seal assistant atmospheric valve

The utility model relates to a kind of atmospheric valve or stop valve, particularly relates to a kind of pre-filtering double seal assistant atmospheric valve.

At present, the atmospheric valve that uses on fluid line transporting system or the oil gas treatment device all is the atmospheric valve that cage type valve pocket and axial soft sealing pair constitute basically, as Chinese patent 92223823.5 disclosed a kind of atmospheric valves, valve is in opening process, axial soft sealing pair often easily is scratched damage, cylndrical surface, the outside, spool bottom also is subjected in the opening process, the high-velocity fluid erosive wear, moreover, do not pass through pre-filtering owing to enter the fluid of closure member, the entrained solid impurity particle often is stuck between cage type valve seat and the spool in the fluid, causes valve to close.For preventing that accident from taking place, have to a standby valve and a filter are installed again, so that keep ordinary production and change valve at the atmospheric valve front end.

The purpose of this utility model is to overcome above-mentioned shortcoming, and a kind of novel pre-filtering function that has is provided, and the atmospheric valve of double seal pair is arranged.

The utility model pre-filtering double seal assistant atmospheric valve is to realize like this, it comprises valve body, the bonnet that is connected with the valve body upper end, the support that is connected with bonnet, the bottom flange that cooperates with valve body lower end is positioned at the cage type valve pocket and the valve seat of valve body, is positioned at the spool of cage type valve pocket, the valve rod that is connected with spool, the handwheel that cooperates with valve rod is installed in the lower end of valve seat and the cartridge filter between the bottom flange, and Sealing.Sealing comprises the valve rod sealing member that general valve all possesses, valve bonnet seal part etc., wherein, at valve seat and valve core chamber the double seal pair is arranged, the double seal pair is the hard sealing pair that valve seat upper-end surface and spool lower end surface constitute, and is embedded in the soft O RunddichtringO in the inverted v-shaped groove that valve seat and cage type valve pocket constitute and the soft sealing pair of spool lower end surface formation mutually.The spool lower end surface all is perpendicular to the plane of valve medial axis with the valve seat upper-end surface or becomes the plane at 60～90 ° of angles with the medial axis, and the side angle of the inverted v-shaped groove of the soft O RunddichtringO of phase embedding is generally 24～30 °.Cartridge filter is a sieve aperture cylinder or by the sieve aperture cylinder and be wrapped in outer filter layer and constitute, as required, filter layer can be the silk screen layer of various hole shapes and pore size, as stainless steel metal silk screen layer or other cellosilk stratum reticulare, it also can be layer of fibers, promptly directly with glass fibre or other fibers encapsulation outside the sieve aperture cylinder, constitute filter layer.In addition, cartridge filter also can adopt general papery pleated filter cartridge commonly used.

The utility model pre-filtering double seal assistant atmospheric valve advantage be to seal the position and separate with the throttling position; protected sealing pair, adopted the two matter sealings of end face, eliminated in the valve opening and closing process being scratched; valve seal is good; long service life adopts the pre-filtering structure, prevents that impurity particle stops up and stuck spool in the fluid; protected equipment behind closure member and the valve; easy to operate, safe and reliable, be applicable to oil, gas, water or other fluid media feed system and process units.

Describe the utility model embodiment in detail below in conjunction with accompanying drawing.

Fig. 1: the utility model structural representation

Fig. 2: the A portion enlarged view among Fig. 1

Fig. 3: V-type groove schematic representation

Fig. 4: cartridge structure schematic representation

The utility model pre-filtering double seal assistant atmospheric valve comprises valve body 1, the bonnet 2 that is connected with valve body 1 upper end, the support 3 that is connected with bonnet 2, the bottom flange 4 that cooperates with valve body 1 lower end, be positioned at the cage type valve pocket 5 and the valve seat 6 of valve body 1, be positioned at the spool 7 of cage type valve pocket 5, the valve rod 8 that is connected with spool 7, the handwheel 9 that cooperates with valve rod 8, be installed in the cartridge filter 10 between valve seat 6 lower ends and the bottom flange 4, be embedded in the interior soft O RunddichtringO 11 of inverted v-shaped groove that valve seat 6 and cage type valve pocket 5 constitute mutually, spool 7 lower end surfaces and valve seat 6 upper-end surfaces all are perpendicular to the plane of valve medial axis, and the side angle of the inverted v-shaped groove of the soft O RunddichtringO of phase embedding is 30 °.Cartridge filter 10 is by sieve aperture cylinder 11 and be wrapped in outer filter layer 12 and constitute, and stuffing box packing 13 is arranged between bonnet and valve rod.

The working principle of the utility model pre-filtering double seal assistant atmospheric valve is, during valve opening, spool 7 is upwards mentioned, after spool 7 rises to its lower end surface to surpass valve pocket 5 grooved bore (being the B position among Fig. 2), flowing medium is by valve inlet and cartridge filter 10, in the narrow openings place throttling of valve pocket 5 fluting places and the formation of spool 7 lower edge, discharge from valve export; During valve closing, spool 7 descends, (being the A position among Fig. 2), spool 7 lower end surfaces tightly are pressed on the upper-end surface of valve seat 9, form the hard sealing pair one, and at this moment the lower end surface of spool also is pressed on the O RunddichtringO, form the soft sealing in second road, in off position down, soft and hard sealing is worked simultaneously, has improved the sealability of valve.

Claims

1, a kind of pre-filtering double seal assistant atmospheric valve, comprise valve body, valve gap, valve rod, spool, cage type valve pocket, valve seat and Sealing, it is characterized in that valve gap is made up of bonnet that is positioned at valve body upper end and the bottom flange that is positioned at valve body lower end, between the lower end of valve seat and bottom flange, cartridge filter is installed, the double seal pair is arranged at valve seat and valve core chamber.

2, pre-filtering double seal assistant atmospheric valve as claimed in claim 1, it is characterized in that the double seal pair is the hard sealing pair that valve seat upper-end surface and spool lower end surface constitute, and be embedded in the soft O RunddichtringO in the inverted v-shaped groove that valve seat and cage type valve pocket constitute and the soft sealing pair of spool lower end surface formation mutually.

3, pre-filtering double seal assistant atmospheric valve as claimed in claim 2 is characterized in that spool lower end surface and valve seat upper-end surface all are perpendicular to the plane of valve medial axis or become the plane at 60～90 ° of angles with the medial axis.

4, pre-filtering double seal assistant atmospheric valve as claimed in claim 2, the side angle that it is characterized in that the inverted v-shaped groove of the soft O RunddichtringO of phase embedding is 24～30 °.

5, pre-filtering double seal assistant atmospheric valve as claimed in claim 1 is characterized in that cartridge filter is a sieve aperture cylinder or by the sieve aperture cylinder and be wrapped in outer filter layer and constitute.

6, pre-filtering double seal assistant atmospheric valve as claimed in claim 5 is characterized in that filter layer is a silk screen layer.

7, pre-filtering double seal assistant atmospheric valve as claimed in claim 5 is characterized in that filter layer is a layer of fibers.

8, pre-filtering double seal assistant atmospheric valve as claimed in claim 1 is characterized in that cartridge filter is the papery pleated filter cartridge.