CN2497121Y

CN2497121Y - Non-differential-pressure on-off stop valve

Info

Publication number: CN2497121Y
Application number: CN 01251650
Authority: CN
Inventors: 黄祥胜
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-08-21
Filing date: 2001-08-21
Publication date: 2002-06-26
Anticipated expiration: 2011-08-21

Abstract

A no-pressure difference start and close cut-off valve is used for controlling all high-temperature and high-pressure gas (liquid) flow pipelines. The utility model is characterized in that a valve electric device is connected with a door frame which is connected with a valve body which is connected with a bottom cover; a valve rod connected with the valve electric device is connected with a valve core; the valve rod is provided with a guide frame; the valve rod is fixedly pierced with the valve core by a transverse pin; the valve core is provided with a guide plate; the lower end of the guide plate is provided with an internal sealing sleeve; the upper end of the internal sealing sleeve is provided with a flow guide window while the lower end is provided with a flow inlet window; the internal sealing sleeve is arranged in the external sealing sleeve; the external sealing sleeve is also provided with the flow inlet window; the external sealing sleeve is sleeved in the valve body; the lower end of the external sealing sleeve is connected to the bottom cover. The main sealing surface of the valve is always not washed by high-pressure medium, with good sealing performance.

Description

No differential pressure open-close stop valve

The utility model relates to a kind of no differential pressure open-close stop valve, is used to control all kinds of High Temperature High Pressure gas (liquid) stream pipeline.

At present, used conventional stop valve, in unlatching initial stage and the later stage of closing pressure reduction maximum, very easily cause medium that the high pressure of valve sealing face is washed away, sealing surface is damaged, cause valve closing not tight, and also have welding slag and dirty piece in the fluid, these welding slags or dirty piece also can be stuck in the sealing surface sometimes, cause sealing surface to destroy, and cause the sealing surface seepage.

The purpose of this utility model is exactly a kind of no differential pressure open-close stop valve of developing at the problems referred to above, it is made up of the moving device of valve electricity (hand), door frame, valve body, bottom, valve rod, spool, leading truck and stuffing box gland etc., during Open valve, open primary sealing area earlier, after open in the outer seal sleeve window that becomes a mandarin, during throttle down, the outer seal sleeve window that becomes a mandarin in closing earlier, after close primary sealing area, primary sealing area does not have the purpose of pressure reduction in the time of can reaching stop valve like this and open and close.

Achieve the above object, the utility model is achieved in that it comprises that valve electricity (hand) moves device, door frame, valve body, valve rod, spool etc., the moving device of valve electricity (hand) is connected with door frame, door frame is connected with valve body, valve inlet and outlet are arranged on the valve body, the moving device of valve electricity (hand) also is connected with valve rod simultaneously, valve rod is connected with spool, its structural feature: adorn a leading truck on the valve rod, the leading truck cunning is stuck in the guiding groove of door frame, and the valve rod lower end is fitted on the spool by nut sleeve, and a lateral pin is arranged, valve rod and spool are worn admittedly, there is guide plate the spool lower end, and guide plate is installed in the inner seal sleeve, and there is diversion window the inner seal sleeve upper end, the lower end window that becomes a mandarin, inner seal sleeve is contained in the outer seal sleeve, the window that also becomes a mandarin on the outer seal sleeve, and the outer seal sleeve upper end is installed on the valve body, its lower end surface is stuck on the positioning boss of bottom, and bottom is connected on the valve body.

The utility model compared with prior art has following advantage:

1, this valve has realized that primary sealing area is when work; the program of opening the back water conservancy diversion earlier and damming earlier and afterwards close; make valve open, close and normally in service; primary sealing area is not subjected to washing away of high-pressure liquid all the time; thereby protected sealing surface effectively; improve sealability widely, prolonged working life.

2, this valve is applied to the drainage in the high temperature and high pressure environment usually because it has adopted little leakage current guide purge primary sealing area, after the structure of closing, so primary sealing area can not destroyed, thereby protect primary sealing area by the welding slag in the fluid, dirty piece.

Description of drawings:

Fig. 1 is a general structure schematic representation of the present utility model

Fig. 2 is an A-A sectional drawing of the present utility model

Fig. 3 is a B-B sectional drawing of the present utility model

Fig. 4 is a C-C sectional drawing of the present utility model

Fig. 5 is a D-D sectional drawing of the present utility model

Fig. 6 is that E of the present utility model is to view

In the accompanying drawing: moving device 2 leading truck sliding sleeves 3 leading truck round bar handles 4 gathering sills 5 door frames 6 valve rods 7 spools 8 guide plates 9 primary sealing areas 10 inner seal sleeves 11 valve inlets 12 outer seal sleeves 13 positioning boss 14 bottoms 15 valve stem nuts 16 leading trucks 17 flat keys 18 nut sleeve 19 lateral pins 20 diversion window 21 inner seal sleeve gathering sills 22 inner seal sleeves of 1 valve electricity (hand) the window 23 valve exports 24 valve bodies 25 bolts 26 gathering sill corners 27 outer seal sleeves window that becomes a mandarin that becomes a mandarin

The utility model is described in further detail below in conjunction with accompanying drawing:

Shown in Fig. 1,2,3,4,5,6, this valve mainly is made up of the moving device of valve electricity (hand), door frame, valve body, bottom, leading truck, valve rod, spool and stuffing box gland etc.

The moving device 1 of valve electricity (hand) is connected with door frame 5 by flange, door frame is connected with valve body 24 upper ends by flange, valve body lower end is connected with bottom 14 by bolt 25, with the Stem Mut 15 of moving device 1 interlock of valve electricity (hand) valve rod 6 of ining succession, connect leading truck 16 by a pair of flat key 17 on the valve rod, on two ends, the leading truck left and right sides round bar handle 3 leading truck sliding sleeve 2 is housed, sliding sleeve 2 sliding being stuck in the guiding groove 4 of door frame 5, valve rod 6 lower ends are fitted on the spool 7 through nut sleeve 18, and there is a lateral pin 19 that spool 7 and valve rod 6 are worn admittedly, the spool the other end is equipped with inner seal sleeve 10, guide plate 8 on the spool 7 is stuck in the inner seal sleeve guiding groove 21 just, inner seal sleeve 10 is sleeved in the outer seal sleeve 12, inner seal sleeve 10 upper ends are near valve export 23 places, a pair of diversion window 20 is arranged, there is the window 22 that becomes a mandarin of 4 symmetries the lower end, on the outer seal sleeve 12 with respect to the inner seal sleeve 10 window window place that becomes a mandarin, the window 27 that becomes a mandarin that 4 symmetries are equally also arranged, the upper end of outer seal sleeve 12 is installed on the valve body 24, its lower end surface is stuck in through positioning recess on the positioning boss 13 of bottom 14, to prevent the outer seal sleeve rotation.

Working procedure: during open valve, moving device 1 work of valve electricity (hand) also drives Stem Mut 15 rotations, on beginning, valve rod 6 carries, leading truck 16 just with leading truck sliding sleeve 2 along guiding groove 4 do earlier Vertical direction on move, this moment, spool 7 lower end surfaces broke away from the primary sealing area 9 that presses, interior outer seal sleeve is little Spielpassung, can produce a small amount of leakage current, the essentially no pressure reduction of primary sealing area, carry in the continuation along with valve rod 6, when moving to guiding groove corner 26 on the leading truck sliding sleeve 2, be with valve rod to rotate together in the process that leading truck is carried on valve rod 6 continues, the also rotation thereupon of guide plate 8 that makes spool 7 and be connected, and force cunning to be stuck in the inner seal sleeve 10 of guide plate 8 lower ends, relatively rotate in outer seal sleeve 12, align fully until the window 27 that becomes a mandarin of become a mandarin window 22 and the outer seal sleeve 12 of inner seal sleeve 10, this moment, fluid was through valve inlet

11, after interior outer seal sleeve becomes a

mandarin window

22,27 and diversion window 20, flow out through valve export 23.

During cut-off valve, the moving device 1 of valve electricity (hand) drives Stem Mut 15 opposite spins, valve rod 6 moves down gradually, same leading truck band leading truck sliding sleeve 2, make valve rod when moving down, also will do corresponding rotation, guiding strip on the spool 7 inner seal sleeve 10 also begin to rotate the window 27 that becomes a mandarin until become a mandarin window 22 and the outer seal sleeve of inner seal sleeve misplace fully seal till, this moment, the spool primary sealing area came downwards to the top edge of diversion window 20 just, the little gap leakage current of interior outer seal sleeve has the purge effect to primary sealing area, along with last segment of valve rod 6 moves down, spool 7 finally presses on the valve body primary sealing area, throttle down.

Claims

1, a kind of no differential pressure open-close stop valve, comprise that valve electricity (hand) moves device, door frame, valve body, valve rod, spool etc., the moving device (1) of valve electricity (hand) is connected with door frame (5), door frame is connected with valve body (24), valve inlet (11) and outlet (23) are arranged on the valve body, the moving device of valve electricity (hand) also is connected with valve rod (6) simultaneously, valve rod is connected with spool (7), it is characterized in that: adorn a leading truck (16) on the valve rod (6), the valve rod lower end is fitted on the spool (7), and there is a lateral pin (19) that valve rod and spool are worn admittedly, the spool the other end is equipped with inner seal sleeve (10), and the guide plate (8) on the spool (7) is contained in the inner seal sleeve, and there is diversion window (20) the inner seal sleeve upper end, the lower end window (22) that becomes a mandarin, inner seal sleeve (10) is contained in the outer seal sleeve (12), the window (27) that becomes a mandarin on the outer seal sleeve, and the outer seal sleeve upper end is installed on the valve body (24), its lower end surface is stuck on the bottom (14), and bottom is connected on the valve body (24).

2, according to the described no differential pressure open-close stop valve of claim 1, it is characterized in that: there is round bar handle (3) at leading truck (16) two ends, and leading truck sliding sleeve (2) is arranged on the round bar handle, and leading truck (16) is contained in the guiding groove (4) of door frame (5) by sliding sleeve (2).

3, according to the described no differential pressure open-close stop valve of claim 1, it is characterized in that: the diversion window (20) of inner seal sleeve (10) upper end has two windows.

4, according to the described no differential pressure open-close stop valve of claim 1, it is characterized in that: the window that all there are 4 symmetries the window that becomes a mandarin (22) on inner seal sleeve (10) and the outer seal sleeve (12), (27).

5, according to the described no differential pressure open-close stop valve of claim 1, it is characterized in that: the guide plate (8) of spool upper end is to slide in the guiding groove (21) that is stuck in inner seal sleeve (10).