CN2628817Y

CN2628817Y - Valve

Info

Publication number: CN2628817Y
Application number: CN 03256229
Authority: CN
Inventors: 余金权
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-07-29
Filing date: 2003-07-29
Publication date: 2004-07-28
Anticipated expiration: 2013-07-29

Abstract

The utility model discloses a sealing structure valve which completely separates a valve rod and a stuffing contact section with the agent. The utility model consists of the valve rod, a valve body and a valve bonnet. A soft isolation layer is provided between the valve rod and the valve bonnet or the valve body, one end of the soft isolation layer is hermetically linked with the valve bonnet or the valve body, another end of the soft isolation layer is hermetically linked with the valve rod, the balanced liquid is injected in a cavity between the soft isolation layer and the valve rod, the valve bonnet. The utility model can be used in high voltage agent.

Description

Valve

Technical field

The utility model relates to a kind of valve.

Background technique

Extensively leak at present in the valve regular meeting of industrial uses such as chemistry, pharmacy, oil, phenomenon such as gas leakage.The reason that causes mainly is that during the startup valve rod, valve rod and filler rub because present valve adopts different fillers seal, and filler hugs valve rod, in the course of time, makes sealing surface damage between valve rod and filler, cause leak, the generation of gas leak phenomenon.Another reason is that the medium in the valve generally all has corrosivity, and valve rod is immersed in for a long time in the medium and produces corrosion and fouling, makes that sealing surface damages between valve rod and filler, cause leak, the generation of gas leak phenomenon.

Summary of the invention

The purpose of this utility model is in order to overcome above-mentioned the deficiencies in the prior art, and the valve of the sealing configuration that a kind of employing separates valve rod and filler contact seal section fully with medium is provided, thereby fundamentally solves the seepage defect of valve.

To achieve these goals, the utility model adopts following technical solution: a kind of valve, comprise valve rod, valve body, valve gap, be provided with the flexible isolating layer between described valve rod and valve gap or the valve body, one end opening of flexible isolating layer is connected with valve gap or valve seal, flexible isolating layer the other end opening is connected with valve stem seal, and cavity is marked with equilibrium liquid between flexible isolating layer and valve rod and the valve gap.

Above-mentioned valve can be arranged to comprise valve rod, valve body, valve gap, be provided with flexible bellow between described valve rod and the valve gap, one end of flexible bellow is enclosed within on the valve gap, by the adapter sleeve fixed seal connection, the other end of flexible bellow is enclosed within on the valve rod, by the adapter sleeve fixed seal connection, cavity is marked with equilibrium liquid between flexible bellow and the valve rod.

Above-mentioned valve also can be arranged to comprise valve rod, valve body, valve gap, be provided with flexible partition between described valve rod and the valve body, one end opening of flexible partition is connected with valve seal, the other end opening sleeve of flexible partition is on valve rod, by the adapter sleeve fixed seal connection, cavity is marked with equilibrium liquid between flexible partition and the valve gap.

Because in the above-mentioned technical solution, be provided with the flexible isolating layer between valve rod and valve gap or the valve body, the valve stem seal section is kept apart fully with the medium in the valve, thereby overcome in the prior art owing to sealing surface between valve rod and filler damages the shortcoming that causes the seepage phenomenon, simultaneously owing to cavity between flexible isolating layer and valve rod and the valve gap is marked with equilibrium liquid, can avoid the destruction of high-pressure medium, make valve applicable to high-pressure medium to the flexible isolating layer.

The utility model is described in further detail below in conjunction with drawings and Examples.

Description of drawings

Fig. 1 is first kind of embodiment's of the utility model valve a general structure schematic representation.

Fig. 2 is the partial enlarged drawing at A place among Fig. 1.

Fig. 3 is second kind of embodiment's of the utility model valve a general structure schematic representation.

Fig. 4 is the partial enlarged drawing at B place among Fig. 3.

Fig. 5 is the partial enlarged drawing at C place among Fig. 3.

Embodiment

As shown in Figure 1 and Figure 2, first kind of embodiment of the utility model valve, comprise valve rod 1, valve body 3, valve gap 2, wherein be provided with flexible bellow 4 between valve rod 1 and the valve gap 2, one end of flexible bellow 4 is enclosed within on the valve gap 2, and by adapter sleeve 6 fixed seal connections, the other end of flexible bellow 4 is enclosed within on the valve rod 1, by adapter sleeve 6 fixed seal connections, cavity is marked with equilibrium liquid 5 between flexible bellow 4 and the valve rod 1.Therefore valve rod 1 is kept apart by flexible bellow 4 with the medium in the valve fully with filler contact seal section, can guarantee that the medium in the valve does not leak outside, can guarantee that valve rod 1 does not contact with the medium in the valve with filler contact seal section, be that valve rod 1 and filler contact seal Duan Buhui are by dielectric corrosion, fouling, thereby overcome in the prior art owing to sealing surface between valve rod 1 and filler damages the shortcoming that causes the seepage phenomenon, simultaneously owing to cavity between flexible bellow 4 and the valve rod 1 is marked with equilibrium liquid, can avoid the destruction of high-pressure medium to flexible bellow 4, the utility model valve is applicable to high-pressure medium.

In order to realize the purpose of this utility model better, the two ends madial wall of flexible bellow 4 can be respectively equipped with raised line 9, valve gap 2 and valve rod 1 are respectively equipped with groove 10, flexible bellow 4 and valve gap 2 cooperate to form and are tightly connected by the groove 10 on the raised line on the flexible bellow 49 and the valve gap 2, flexible bellow 4 and valve rod 1 cooperate to form and are tightly connected by the groove 10 on the raised line on the flexible bellow 49 and the valve rod 1, both can guarantee flexible bellow 4 and valve gap 2 or and valve rod 1 between the location, can guarantee again flexible bellow 4 and valve gap 2 or and valve rod 1 between sealing.In order to adapt to the big requirement of valve rod opening travel, can be fixed with reservoir 7 on the valve rod 1, valve rod 1 is provided with intercommunicating pore 8, and an end of intercommunicating pore 8 communicates with reservoir 7, and cavity communicates between the other end of intercommunicating pore 8 and flexible bellow 4 and the valve rod 1.Its working principle is: when valve starts when doing by closing, valve rod 1 moves from bottom to top, and flexible bellow 4 axially slowly shrinks, radially slowly outer rising, when outside rise when producing certain tension force, flexible bellow 4 inner equilibrium liquid 5 flow to reservoir 7, have guaranteed the balance of flexible bellow 4 external and internal pressures; Otherwise, when valve by reaching when closing action, valve rod 1 moves from top to bottom, flexible bellow 4 axially slowly stretches, radially slowly shrink, when producing certain tension force when stretching, reservoir 7 inner equilibrium liquid 5 cavity between flexible bellow 4 and valve rod 1 is filled, and has guaranteed the balance of flexible bellow 4 external and internal pressures.

As Fig. 3, Fig. 4, shown in Figure 5, second kind of embodiment of the utility model valve, comprise valve rod 1, valve body 3, valve gap 2, wherein be provided with flexible partition 11 between valve rod 1 and the valve body 3, valve body 3 is provided with boss 12, one end opening of flexible partition 11 is fixed on the boss 12 of valve body 3 by packing ring 14 and fastening screw trip bolt 13, realize being tightly connected of flexible partition 9 and valve body 3, the other end opening madial wall of flexible partition 11 is provided with raised line 9, valve rod 1 is provided with groove 10, this end opening of flexible partition 11 is enclosed within on the valve rod 1, raised line 9 on the flexible partition 11 cooperatively interacts with the groove 10 on the valve rod 1, by adapter sleeve 6 fixed seal connections, cavity is marked with equilibrium liquid 5 between flexible partition 9 and the valve gap 2.

Claims

1, a kind of valve, comprise valve rod (1), valve body (3), valve gap (2), it is characterized in that: be provided with flexible bellow (4) between valve rod (1) and the valve gap (2), one end of flexible bellow (4) is enclosed within on the valve gap (2), by adapter sleeve (6) fixed seal connection, the other end of flexible bellow (4) is enclosed within on the valve rod (1), and by adapter sleeve (6) fixed seal connection, cavity is marked with equilibrium liquid (5) between flexible bellow (4) and the valve rod (1).

2, valve according to claim 1, it is characterized in that: the two ends madial wall of flexible bellow (4) is respectively equipped with raised line (9), valve gap (2) and valve rod (1) are respectively equipped with groove (10), flexible bellow (4) and valve gap (2) cooperate to form and are tightly connected by the groove (10) on the raised line (9) on the flexible bellow (4) and the valve gap (2), and flexible bellow (4) and valve rod (1) are tightly connected by the formation that cooperates of the groove (10) on the raised line (9) on the flexible bellow (4) and the valve rod (1).

3, valve according to claim 1 and 2, it is characterized in that: be fixed with reservoir (7) on the valve rod (1), valve rod (1) is provided with intercommunicating pore (8), one end of intercommunicating pore (8) communicates with reservoir (7), and cavity communicates between the other end of intercommunicating pore (8) and flexible bellow (4) and the valve rod (1).

4, a kind of valve, comprise valve rod (1), valve body (3), valve gap (2), it is characterized in that: be provided with flexible partition (11) between valve rod (1) and the valve body (3), one end opening of flexible partition (11) and valve body (3) are tightly connected, the other end opening sleeve of flexible partition (11) is on valve rod (1), by adapter sleeve (6) fixed seal connection, cavity is marked with equilibrium liquid (5) between flexible partition (11) and the valve gap (2).

5, valve according to claim 4, it is characterized in that: valve body (3) is provided with boss (12), one end opening of flexible partition (9) is fixed on the boss (12) of valve body (3) by packing ring (14) and fastening screw trip bolt (13), realize being tightly connected of flexible partition (9) and valve body (3), the other end opening madial wall of flexible partition (11) is provided with raised line (9), valve rod (1) is provided with groove (10), and flexible partition (11) and valve rod (1) cooperate to form and are tightly connected by the groove (10) on the raised line (9) on the flexible partition (11) and the valve rod (1).