CN2336171Y

CN2336171Y - Spindle of valve body and its seal ring

Info

Publication number: CN2336171Y
Application number: CN 97222273
Authority: CN
Inventors: 卢国珍
Original assignee: BAOQIAO Co Ltd TAIWAN
Current assignee: BAOQIAO Co Ltd TAIWAN
Priority date: 1997-09-19
Filing date: 1997-09-19
Publication date: 1999-09-01
Anticipated expiration: 2007-09-19

Abstract

The utility model relates to a centre shaft of a valve body and the sealing ring of the valve body. The centre shaft is a fixed seat which passes through the valve body, and a lower containing groove is arranged on the bottom of the fixed seat. A flange which is arranged in the lower containing groove in ring way is arranged on the bottom of the centre shaft, and a circle of sealing ring is clamped between the top surface of the flange and the top surface of the lower containing groove, wherein, the top surface and the bottom surface of the sealing ring are an upper slope and a lower slope which are slantways cut to the outer edge to be mutually matched with the flange and the lower containing groove to improve the sealing performance among the sealing ring, the flange of the centre shaft, the perisporium of the centre shaft and the top surface of the lower containing groove by using the pushing and contacting force of the slope to improve degree of safety when the valve body is used.

Description

Valve body axis and seal ring thereof

The utility model relates to a kind of valve body axis and seal ring thereof.

Ball valve is to be located on the pipeline, the fluid control switch that whether circulates in order to pilot line, and since its have and characteristic such as can open, flow resistance minimum, upkeep cost are lower fast, so widely the producer uses, and because it is widely used in the high chemical industry of security requirement, relatively, the sealing of ball valve (anti-leakage) requires also to improve relatively.And the design of existing ball valve, design kenel as shown in Figure 3, its structure is provided with a hollow body 40, be incorporated into the side cover 41 of body 40 both sides and be located at the fixed base 42 at body 40 tops, wherein, one spheroid 50 with through hole is set in the body 40, is provided with Sealing 51 between spheroid 50 both sides and the side cover 41; And the top and bottom ends of fixed base 42 is respectively equipped with containing groove 421 and following containing groove 422, in upper and lower containing groove 421,422, be respectively equipped with diaphragm seal 52 and seal ring 53, other establishes an axis 60 that passes seal ring 53 and diaphragm seal 52, axis 60 bottoms are provided with a clamping block 61 that can snap in spheroid 50, and can be butted on the flange 62 of seal ring 53 root edges, and axis 60 tops are provided with the externally threaded bar 63 of tool, spiral shell was established nut 64 and handle 65 after this bar 63 passed diaphragm seal 52, rotating handles 65 can drive axis 60 rotation, and then control spheroid 50 is path or closes.

For making ball valve reach sealing, anti-leakage, except the Sealing 51 of being located at spheroid 50 both sides is required to be the wear-resisting material, when assembling, utilization screws nut 64, axis 60 is up promoted, and then seal ring 53 pushed against in flange 62 and down between the apical margin of containing groove 422, though aforementioned existing ball valve design widely use, but this kind design has following shortcoming:

1. when axis 60 up promotes, be to utilize positive force that seal ring 53 is suppressed in flange 62 end faces to reach down between containing groove 422 apical margins, but the inner edge of seal ring 53 is not subjected to any lateral force, and only be the periphery wall that nature is located on axis 60, so the sealing of axis 60 perisporiums and seal ring 53 inner edges is very not good.

2. owing to axis 60 must rotate to and fro for the keying of control spheroid 50, after after a while, its perisporium and flange 62 apical margins promptly constantly rub with seal ring 53, cause seal ring 53 wearing and tearing, and produce gap a as illustrated in fig. 4, b, wherein, be formed at the gap b between seal ring 53 root edges and flange 62 end faces, can utilize and screw the nut of being located at axis 60 tops, making axis 60 produce the positive force that up promotes pushes against once again in seal ring 53 root edges, yet the gap a that is formed at axis 60 perisporiums and seal ring 53 inner edges then can't utilize outer force compensating, when seal ring 53 root edges wore and tore once again and form gap b, gas or liquid promptly can be from gap b, a leaks out.

From the above, the seal ring leak preventing effect of existing ball valve is very not good, and in view of the above, this creator promptly sets about design, improves at the structure of seal ring.

The purpose of this utility model is to provide a kind of valve body axis and seal ring thereof, when the axis of valve body up promotes and applies pressure to seal ring, can produce horizontal component and, seal ring be pushed against in the axis periphery, increase its sealing the past axis periphery pushing and pressing of seal ring.

The purpose of this utility model is achieved in that a kind of valve body axis and seal ring thereof, this axis is the fixed base that passes valve body, and be provided with containing groove at the bottom of the fixed base, the axis bottom then is provided with a ring and places down the interior flange of containing groove, folder is established a circle seal ring between the end face of flange end face and following containing groove, wherein the top of seal ring, bottom surface are provided with the ramp and the lower inclined plane of cutting sth. askew towards outer rim, and the end face of containing groove then was provided with the tilted guide surface that can cooperate with seal ring relatively under flange reached.

In above-mentioned valve body axis and seal ring thereof, can be provided with one section between the maximum diameter of seal ring and the inner edge and can reach the flat face that following containing groove end face cooperatively interacts with flange; Between the upper and lower inclined-plane peak and inner edge of seal ring, and between minimum point and the outer rim, can respectively be provided with one section and can reach the flat face that following containing groove end face cooperatively interacts with flange.

The utility model compared with the prior art advantage and good effect is very obvious.By above technological scheme as can be known, flange of the present utility model, down between containing groove and the seal ring because of forming wedge-like engagement, so the flange that can improve axis and seal ring, axis perisporium and seal ring inner edge, and following containing groove and seal ring between adaptation, thereby improved margin of safety in the valve body use.

Further specify concrete structure of the present utility model below in conjunction with embodiment and accompanying drawing:

Fig. 1 is an an embodiment's of the present utility model local enlarged diagram.

Fig. 2 is another embodiment's of the utility model a local enlarged diagram.

Fig. 3 is the plan cross-section schematic representation of existing ball valve.

Fig. 4 is the axis of existing ball valve and the local enlarged diagram of fixed base.

As shown in Figure 1, the utility model is to be applicable to general ball valve, so the non-this case emphasis that concerns of other structures does not also have particular form, so will not give unnecessary details, axis 10, fixed base 20, and the part combination enlarged diagram of seal ring 30 only is shown.By shown in the accompanying drawing as can be known, axis 10 is to utilize its flange 11 of being located at the bottom to be placed through in the following containing groove 21 of fixed base 20, and flange 11 end face stage casings are provided with the high outside and low outside tilted guide surface 111 of a circle, also are provided with outer low and inner high tilted guide surface 211 relatively in the end face stage casing of following containing groove 21 in addition;

And seal ring 30 also forms the conical design of cutting sth. askew to outer rim, promptly also be provided with ramp 31 and lower inclined plane 32 relatively in the Qi Ding bottom surface, two tilted guide surfaces 111,211 of containing groove 21 match to reach down with flange 11, promptly form wedge-shaped design, and upper and lower inclined-

plane

31,32 peaks of seal ring 30 are to forming one section flat face 33 between the inner edge, also form one section flat face 34 between its minimum point and the outer rim, containing groove 21 cooperatively interacts to reach down with flange 11.

During assembling, when axis 10 stressed and when up promoting, be about to seal ring 30 clippings between flange 11 end faces and 20 times containing groove 21 end faces of fixed base, and utilize flange 11 and down the tilted guide surface 111,211 of containing groove 21 apply pressure to seal ring 30 upper and lower inclined-

planes

31,32, make the splendid adaptation of generation between the three, simultaneously, owing to cooperating the horizontal component produced also can bestow the power that seal ring 30 inner edges are subjected to the level pushing and pressing, the inclined-plane is close to axis 10 perisporiums.

In addition, seal ring of the present utility model also can be the design kenel of Fig. 2, the bottom surface, top that is about to seal ring 30 establish with the ramp 31 that is connected to outer periphery, lower inclined plane 32, and peak to the flat face between the inner edge 33, it more helps seal ring 30 performance inclined-plane effects, and makes its inner rim be close to axis 10.

In sum, the utility model utilizes the inclined-plane to cooperate, and makes it produce excellent adaptation, thereby has improved the margin of safety in the valve body use.

Claims

1. valve body axis and seal ring thereof, this axis is the fixed base that passes valve body, and is provided with containing groove at the bottom of the fixed base, and the axis bottom then is provided with a ring and places down the interior flange of containing groove, folder is established a circle seal ring between the end face of flange end face and following containing groove, it is characterized in that:

The top of seal ring, bottom surface are provided with the ramp and the lower inclined plane of cutting sth. askew towards outer rim, and the end face of containing groove then was provided with the tilted guide surface that can cooperate with seal ring relatively under flange reached.

2. valve body axis according to claim 1 and seal ring thereof is characterized in that: between the maximum diameter and inner edge of described seal ring, be provided with one section and can reach the flat face that following containing groove end face cooperatively interacts with flange.

3. valve body axis according to claim 1 and seal ring thereof, it is characterized in that: between the upper and lower inclined-plane peak and inner edge of described seal ring, and between minimum point and the outer rim, respectively be provided with one section and can reach the flat face that following containing groove end face cooperatively interacts with flange.