CN2145290Y

CN2145290Y - Stop valve

Info

Publication number: CN2145290Y
Application number: CN 92241666
Authority: CN
Inventors: 凌万春
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-11-23
Filing date: 1992-11-23
Publication date: 1993-11-03
Anticipated expiration: 2002-11-23

Abstract

The utility model relates to a stop valve that industrial pipeline used, various oil, gas, water pipeling among the specially adapted oil development process use. Mainly comprises a valve body, a gland, a bush, a plunger, a hand wheel and a valve rod. It is characterized in that the plunger is a hollow cylinder, a track is arranged on the outer circular surface and is in sliding fit with a groove in the valve body, the outer lower part of the plunger is provided with a taper of 45-60 degrees, and hard alloy is welded in a surfacing mode; the lower part of the plunger is provided with a seal; a valve rod gasket or a spring disc is arranged between the gland and the bush; a sealing culvert and a sealing gasket are arranged between the valve body and the plunger piston. The stop valve with simple structure has the advantages that the valve rod only rotates, the hydraulic self-balancing switch without up-down displacement is light and convenient, and the sealing performance is good.

Description

Closed valve

The utility model relates to the stop valve that industrial pipeline uses, and the various oil, gas, the waterpipe that are specially adapted in the petroleum production process use.

The stop valve that uses in the existing petroleum production process as shown in Figure 1, its structure mainly comprises handwheel 1, valve rod 5, valve gap 6, valve plate 15, valve seat 6, valve body 9, its major defect is the handwheel rotation, drive the valve rod rotation and move up and down and drive valve plate and move up and down, when opening valve, valve rod exposes valve gap one big section, so gate takes up space greatly.Because the flashboard up and down pressure reduction in space is very big, so very heavy during knife switch, the gate that is used on the high pressure line must be by means of tool switch.In addition, clearance seal is mainly leaned in the sealing of valve plate and valve seat, easy seepage, and working life is short.

For overcoming the shortcoming of above-mentioned used valve, design a kind of valve rod and only rotate, the switch of fluid power self balancing of not doing upper and lower displacement is light, good seal performance, stop valve simple in structure.

Stop valve of the present utility model mainly comprises valve body 9, gland 6, lining 4, plunger 10, handwheel 1, valve rod 5, and handwheel 1 drives valve rod 5 rotations and drives plunger 10 and move up and down, and opens or the passage of valve body 9.Plunger 10 is hollow Cylinder, has the groove in track 13 and the valve body 9 to be slidingly matched the tapering 11 that its outer bottom is 45 °～60 °, and pile-up welding hard alloy, the screw thread running fit of the screw thread of plunger 10 inside and valve rod 5 bottoms on the face of outer garden.Sealing 12 is arranged at plunger 10 bottoms.Dress valve rod pad or wheel ball bearing 3 between gland 6 and lining 4.Sealing culvert 7 and sealing gasket 8 are housed between valve body 9 and the plunger 10.The switch indicator 2 of valve is equipped with on gland 6 tops.4 of plunger 10 and linings have sealing, and lining 4 has sealing with between the valve body 9 sealing being arranged between lining 4 and the valve rod 5.

Major advantage of the present utility model is: 1, because the screw thread between valve rod 5 and the plunger 10 is a running fit, fluid below the plunger can penetrate into the plunger upper end by the gap between the screw thread, plunger pressure balance up and down, so-called fluid power self balancing that Here it is, because hydraulic resistance balance effect, during the switch gate, handwheel is very light, does not need to get final product switch by other instrument.Can adopt pad or cartridge drum between valve rod and the gland in addition, so the switch of handwheel is lighter.2, the switch of valve is to move up and down along the groove in the valve body by the plunger track, and valve rod only rotates, and does not move up and down, so the switch of valve is easily light and handy.The on off state of valve is indicated by indicator.3, there is tapering the plunger lower end, and pile-up welding hard alloy, and the lower end adds sealing, thus play the double-sealing effect, so plunger wear-resisting, corrosion resistant performance is high, good airproof performance.

Description of drawings:

Fig. 1 is a prior art stop valve structure schematic representation;

Fig. 2 is the structural representation of the utility model stop valve;

Fig. 3 is the A-A sectional drawing of Fig. 2.

Now in conjunction with the accompanying drawings the utility model is further described:

The utility model mainly comprises valve body 9, gland 6, lining 4, plunger 10, handwheel 1, valve rod 5.Handwheel 1 adopts 8 font dishes, and it is convenient to rotate.Handwheel 1 drives valve rod 5 and rotates, and valve rod 5 rotates and drives plungers 10 and move up and down and open or the passage of valve body 9.The twice groove is arranged in valve body 9, have twice track 13 to be slidingly matched on the plunger 10, plunger is only moved up and down in valve body and can not rotate with it.The screw thread running fit of screw thread with plunger 10 inside arranged at valve rod 5 bottoms, and fluid can penetrate into plunger upper part by the slit between screw thread, to reach plunger hydraulic resistance balance up and down.At the switch indicator 2 of gland 6 tops dresses valve, it can move up and down with the rotation of valve rod 5 and indicates valve to be in to open or close or partially open state.Dress valve rod pad or wheel ball bearing 3 between gland 6 and lining 4, it works the drag effect that reduces the valve rod rotation.Expanded graphite sealing culvert 7 and sealing gasket 8 are housed between valve body 9 and the plunger 10, and sealability is fine.Plunger 10 is hollow Cylinder, and 45 °～60 ° tapering 11 is arranged at its outer bottom, and pile-up welding hard alloy, and flexible sealing 12 is arranged in the bottom, and its intensity, hardness, corrosion resistance, sealing are all very good.Plunger 10 has twice " O " type packing_seal with 4 of linings.Lining 4 is with " O " type packing_seal is arranged between the valve body 9.3 road packing_seals are arranged between lining 4 and the valve rod 5.So the each several part sealability of stop valve is all fine.

Claims

1, a kind of stop valve, mainly comprise valve body (9), gland (6), lining (4), plunger (10), handwheel (1), valve rod (5), it is characterized in that plunger (10) is hollow Cylinder, there is the interior groove of track (13) and valve body (9) to be slidingly matched on the face of outer garden, 45 °～60 ° tapering (11) is arranged at its outer bottom, and pile-up welding hard alloy; The screw thread that plunger (10) is inner and the screw thread running fit of valve rod (5) bottom; Sealing (12) is arranged at plunger (10) bottom; Dress valve rod pad or wheel ball bearing (3) between gland (6) and lining (4); Sealing is housed between valve body (9) and the plunger (10) contains (7) and sealing gasket (8); Between plunger (10) and the lining (4) sealing is arranged, between lining (4) and the valve body (9) sealing is arranged, between lining (4) and the valve rod (5) sealing is arranged.

2, stop valve according to claim 1 is characterized in that gland (6) top is equipped with the switch indicator (2) of valve.